WO2018152488A1 - Fat-associated lymphoid clusters as sites for transplantation,tissue regeneration, organogenesis and function for multiple tissues - Google Patents
Fat-associated lymphoid clusters as sites for transplantation,tissue regeneration, organogenesis and function for multiple tissues Download PDFInfo
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Classifications
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- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
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- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/22—Urine; Urinary tract, e.g. kidney or bladder; Intraglomerular mesangial cells; Renal mesenchymal cells; Adrenal gland
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- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/28—Bone marrow; Haematopoietic stem cells; Mesenchymal stem cells of any origin, e.g. adipose-derived stem cells
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- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
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Definitions
- the present disclosure relates to the engraftment and proliferation of organ cells in fat-associated lymphoid clusters ("FALCs," a.k.a. "milky spots”) to generate ectopic tissue that may be used to supplement or replace organ function in a subject.
- FALCs fat-associated lymphoid clusters
- milky spots ectopic tissue
- hepatocyte transplantation has demonstrated its functional utility in animal models. From the transgenic urokinase (7-9) to the induced tyrosinemic mouse (10-15), hepatocyte transplantation has successfully established its therapeutic potential with complete regeneration of the liver. In spite of these encouraging results, human hepatocyte transplantation is still in the experimental phase of clinical exploration (6, 16) in hope that the positive results of animal studies can be translated into therapeutic utility for human diseases.
- Transplanted liver cells are generally injected via the spleen (e.g., through the splenic artery in human patients or into the splenic parenchyma in rodents) or via the portal vein. Liver cells rapidly migrate, actively or passively, to the diseased liver, where hepatic regeneration by the transplanted hepatocytes is expected to occur.
- This approach limits, and possibly precludes, the efficacy of cellular therapy in a vast majority of patients with severe liver disease due to the presence of cirrhosis and fibrosis (17), common pathological features in diseased livers.
- native liver regeneration for these patients - the patients most in need of the treatment - is a major challenge.
- auxiliary liver 18-20.
- this consists of implanting a healthy liver graft placed either heterotopically or orthotopically while leaving all or part of the native liver intact.
- This approach not only has the potential to avoid OLT for a certain category of patients, but it also embraces the potential for spontaneous regeneration of the native liver and eventual withdrawal of immunosuppressive drugs (21-24).
- problems have been noted in early trials (18-20, 25-27), more recent favorable outcomes have been reported and are encouraging in cases of acute liver failure (25), metabolic disorder (28-31), and even cirrhotic liver (26, 27).
- kidney transplantation Known therapeutic methods for treating kidney disease include rest, diet changes, pharmacotherapy, hemodialysis therapy and kidney transplantation and depend on the severity of the disease.
- dialysis therapy such as hemodialysis or peritoneal dialysis or kidney transplantation is necessary.
- hemodialysis therapy allows the elimination of waste that accumulates in the body, the function of the damaged kidney does not recover.
- the patient undergoes a kidney transplant the patient will have to continue dialysis therapy for their lifetime.
- problems associated with kidney transplantation including a shortage of donors, difficulties in tissue compatibility and avoidance of rejection reaction.
- Lymph nodes and Fat-Associated Lymphoid Clusters are secondary lymphoid organs of the lymphatic system, and are well-vascularized. FALCs occur at a number of anatomical locations, including the omentum (see FIGURE 1). They have an important role in the immune system, allowing for massive expansion of white blood cells during various conditions such as bacterial or viral infections. Interestingly, lymph nodes and milky spots also have clinical significance in cancer, as they are the sites of early metastatic events, namely tumor invasion and initial metastatic growth. Tumor metastasis in lymph nodes is commonly used for the staging and prognosis of cancer.
- the present disclosure relates to the engraftment and proliferation of cells in fat-associated lymphoid clusters ("FALCs" or "milky spots”), which may be used to generate functional ectopic tissue for transplantation into a host subject. It is based, at least in part, on the discovery that hepatocytes, intraperitoneally transplanted into a mouse with liver dysfunction, localize and proliferate in FALCs (milky spots) of the omentum, as well as in FALCs of mesenteric, splenic, portal and/or gonadal fat to produce ectopic liver tissue capable of beneficially augmenting liver function in the mouse.
- FALCs fat- associated lymphoid clusters
- mesenteric, splenic, portal and/or gonadal fat to produce ectopic liver tissue capable of beneficially augmenting liver function in the mouse.
- the present disclosure provides for methods and compositions to establish ectopic liver tissue in FALCs (milky spots) of the omentum, as well as in FALCs of mesenteric, splenic, portal and/or gonadal fat and to use such ectopic liver tissue for therapeutic benefit.
- the present disclosure further provides for methods and compositions to generate ectopic kidney tissue in FALCs, which can be used in a subject for therapeutic benefit.
- the present disclosure further provides methods and compositions for grafting and proliferating cells, e.g., hepatocyte or kidney cells, in FALCs or lymph nodes by activating the lymphotoxin beta receptor (LTpR) and/or NF- ⁇ -inducing kinase (NIK) signaling pathway.
- LTP lymphotoxin beta receptor
- NIK NF- ⁇ -inducing kinase
- the present disclosure provides methods for developing ectopic tissue in a subject.
- the method includes introducing one or more cells into a fat-associated lymphoid cluster or lymph node of the subject and providing one or more agents that promotes the proliferation and/or vascularization of the one or more cells to form an ectopic tissue.
- the one or more cells are hepatocytes and the ectopic tissue is ectopic liver tissue.
- the one or more cells are kidney cells and/or kidney tissue fragments and the ectopic tissue is ectopic kidney tissue.
- the fat-associated lymphoid cluster is located in the adipose tissue of the pleural and/or pericardial and/or peritoneal cavity.
- the FALC can be located in the omentum and/or mesenteric and/or splenic and/or portal and/or gonadal fat of the subject.
- the agent that promotes the formation of ectopic tissue comprises one or more of bone marrow-derived cells and/or stromal cells.
- the one or more agents comprise stromal cells, e.g., fibroblast cells.
- the stromal cells express one or more of podoplanin, NIK and/or LTpR.
- the stromal cells are treated with an activator of the LTpR and/or NIK signaling pathway.
- the agent that promotes the formation of ectopic tissue comprises an activator of the LTpR and/or NIK signaling pathway, e.g., an activator of LTpR and/or NIK. In certain embodiments, the agent that promotes the formation of ectopic tissue comprises an activator of the non-canonical NF- ⁇ signaling pathway. In certain embodiments, the activation of LTpR and/or NIK and/or the activation of the non-canonical NF- ⁇ signaling pathway promotes the proliferation and/or
- the agent that promotes the formation of ectopic tissue comprises an agent that promotes inflammation.
- inflammation is induced prior to introducing one or more cells in a fat-associated lymphoid cluster or lymph node of the subj ect.
- the present disclosure further provides methods of treating a subject in need of augmented liver function.
- the method comprises administering, to the subject, a therapeutically effective amount of hepatocytes, and promoting the proliferation of a hepatocyte in a fat-associated lymphoid cluster or lymph node of the subject to form ectopic liver tissue.
- the formation of ectopic liver tissue in the fat-associated lymphoid cluster is promoted by administration of the hepatocytes locally to the anatomical region of the fat-associated lymphoid cluster.
- the fat-associated lymphoid cluster is located in the omentum and/or mesenteric and/or splenic and/or portal and/or gonadal fat.
- the formation of ectopic liver tissue in the fat-associated lymphoid cluster or lymph node is promoted by co-administration of one or more of bone marrow-derived cells or stromal cells.
- stromal cells are co-administered.
- the stromal cells are fibroblast cells.
- the stromal cells express one or more of podoplanin, NIK, and/or LTpR.
- the formation of ectopic liver tissue in the fat-associated lymphoid cluster or lymph node is promoted by co-administration of an activator of the LTpR and/or NIK signaling pathway. In certain embodiments, the formation of ectopic liver tissue in the fat-associated lymphoid cluster or lymph node is promoted by coadministration of an activator of the non-canonical NF- ⁇ signaling pathway.
- the formation of ectopic liver tissue in the fat-associated lymphoid cluster or lymph node is promoted by inducing inflammation in the subject.
- inflammation is induced by administration of an agent that promotes inflammation to the subject.
- the inflammation is induced prior to introducing one or more cells in a fat-associated lymphoid cluster or lymph node of the subject.
- the present disclosure further provides methods for generating an ectopic liver, where the method comprises introducing, into a fat-associated lymphoid cluster or lymph node, one or more hepatocytes, and providing at least one agent that promotes the formation of ectopic liver tissue.
- the method is practiced in vivo or in vitro.
- the agent that promotes the formation of ectopic liver tissue comprises one or more of bone marrow-derived cells and/or stromal cells.
- the stromal cells are fibroblast cells.
- the stromal cells express one or more of podoplanin, NIK and/or LTpR.
- the stromal cells are treated with an activator of the LTpR and/or NIK signaling pathway.
- the agent that promotes the formation of ectopic tissue comprises an activator of the LTpR and/or NIK signaling pathway.
- the agent that promotes the formation of ectopic tissue comprises an agent that promotes inflammation.
- the method for generating an ectopic liver tissue in a subject comprises introducing cells comprising one or more hepatocytes and one or more stromal cells in a fat-associated lymphoid cluster or lymph node of the subject and providing an activator of the LTpR and/or NIK signaling pathway, wherein activation of the LTpR and/or NIK signaling pathway in the one or more stromal cells promotes the proliferation and/or vascularization of the one or more hepatocytes to form the ectopic liver tissue.
- the method for generating an ectopic liver tissue in a subject comprises introducing cells comprising one or more hepatocytes and one or more stromal cells in a fat-associated lymphoid cluster or lymph node of the subject and providing an activator of LTpR and/or NIK, wherein activation of LTpR and/or NIK in the one or more stromal cells promotes the proliferation and/or vascularization of the one or more hepatocytes to form the ectopic liver tissue.
- the kidney cells comprise cells isolated from embryonic kidney, metanephroi, cells isolated from a kidney organoid formed in vitro or any combination thereof.
- the present disclosure further provides methods of treating a subject in need of augmented kidney function.
- the method comprises
- kidney cells or kidney tissue fragments
- the formation of ectopic kidney tissue in the fat-associated lymphoid cluster is promoted by administration of the hepatocytes locally to the anatomical region of the fat-associated lymphoid cluster.
- the fat-associated lymphoid cluster is located in the omentum and/or mesenteric and/or splenic and/or portal and/or gonadal fat.
- the formation of ectopic kidney tissue in the fat- associated lymphoid cluster or lymph node is promoted by co-administration of one or more of bone marrow-derived cells or stromal cells.
- stromal cells are co-administered.
- the stromal cells are fibroblast cells.
- the stromal cells express one or more of podoplanin, NIK, and/or LTpR.
- the formation of ectopic kidney tissue in the fat-associated lymphoid cluster or lymph node is promoted by co-administration of an activator of the LTpR and/or NIK signaling pathway. In certain embodiments, the formation of ectopic kidney tissue in the fat-associated lymphoid cluster or lymph node is promoted by co-administration of an activator of the non-canonical NF- ⁇ signaling pathway.
- the formation of ectopic kidney tissue in the fat- associated lymphoid cluster or lymph node is promoted by inducing inflammation in the subject.
- inflammation is induced by administration of an agent that promotes inflammation to the subject.
- inflammation is induced prior to introducing the one or more cells kidney cells in a fat-associated lymphoid cluster or lymph node of the subject.
- the present disclosure further provides methods for generating an ectopic kidney, where the method comprises introducing, into a fat-associated lymphoid cluster or lymph node, one or more kidney cells (or one or more kidney tissue fragments), and providing at least one agent that promotes the formation of ectopic kidney tissue.
- the method is practiced in vivo or in vitro.
- the agent that promotes the formation of ectopic kidney tissue comprises one or more of bone marrow-derived cells and/or stromal cells.
- the stromal cells are fibroblast cells.
- the stromal cells express one or more of podoplanin, NIK and/or LTpR.
- the stromal cells are treated with an activator of the LTpR and/or NIK signaling pathway.
- the agent that promotes the formation of ectopic kidney tissue comprises an activator of the LTpR and/or NIK signaling pathway.
- the agent that promotes the formation of ectopic kidney tissue comprises an agent that promotes inflammation.
- a method for generating an ectopic kidney tissue in a subject comprises introducing cells comprising one or more kidney cells and one or more stromal cells in a fat-associated lymphoid cluster or lymph node of the subject and providing an activator of the LTpR and/or NIK signaling pathway, wherein activation of the LTpR and/or NIK signaling pathway in the one or more stromal cells promotes the proliferation and/or vascularization of the one or more kidney cells to form the ectopic kidney tissue.
- a method for generating an ectopic kidney tissue in a subject comprises introducing cells comprising one or more kidney cells and one or more stromal cells in a fat-associated lymphoid cluster or lymph node of the subject and providing an activator of LTpR and/or NIK, wherein activation of LTpR and/or NIK in the one or more stromal cells promotes the proliferation and/or vascularization of the one or more kidney cells to form the ectopic kidney tissue.
- compositions for generating an ectopic tissue comprising a plurality of cells and one or more of the agents that promote the formation of an ectopic tissue.
- a composition for generating an ectopic liver tissue comprises a plurality of hepatocytes and one or more of the agents that promote the formation of an ectopic liver.
- a composition for generating an ectopic kidney tissue comprises a plurality of kidney cells and one or more of the agents that promote the formation of an ectopic kidney
- the one or more agents that is included in a composition of the presently disclosed subject matter comprises a plurality of bone marrow-derived cells and/or a plurality of stromal cells.
- the stromal cells express one or more of podoplanin, NIK, and/or LTpR.
- the one or more agents is an activator of the LTpR and/or NIK signaling pathway.
- the one or more agents is an agent that promotes inflammation.
- the one or more agents comprises two or more of: (a) plurality of bone marrow-derived cells and/or a plurality of stromal cells stromal cells; (b) an activator of the LTpR and/or NIK signaling pathway; and (c) an agent that promotes inflammation.
- the composition further comprising a synthetic culture medium.
- a method of treating a subject in need of augmented liver function comprises administering, to the subject, a therapeutically effective amount of hepatocytes, and providing one or more agents that promote formation of an ectopic liver tissue in a lymph node of the subject, wherein the one or more agents comprise two or more of: (a) a plurality of bone marrow-derived cells, a plurality of stromal cells or a combination thereof; (b) an activator of a LTpR signaling pathway, an activator of a NIK signaling pathway or a combination thereof; or (c) an agent that promotes inflammation.
- the present disclosure further provides a method of treating a subject in need of augmented kidney function, where the method comprises administering, to the subject, a therapeutically effective amount of kidney cells, a kidney tissue fragment, or a combination thereof, and providing one or more agents that promotes formation of an ectopic kidney tissue in a lymph node of the subject, wherein the one or more agents comprise two or more of: (a) a plurality of bone marrow-derived cells, a plurality of stromal cells or a combination thereof; (b) an activator of a LTpR signaling pathway, an activator of a NIK signaling pathway or a combination thereof; or (c) an agent that promotes inflammation.
- kits comprising one or more compositions disclosed herein. 4. BRIEF DESCRIPTION OF THE FIGURES
- FIGURE 1 Fat-associated lymphoid clusters; schematic depiction (upper panel), and distribution (lower panel).
- FIGURE 2A-D Generation of ectopic livers in secondary lymphoid tissues.
- A Macroscopic image of a Fah _/" mouse 12 weeks after IP transplantation of hepatocytes. Yellow circles highlight the many ectopic hepatic nodules generated in lymphoid tissues (milky spots and lymph nodes (LN)).
- B Mesenteric pig lymph node 2 months after portacaval shunt, partial hepatectomy and hepatocyte transplantation. Left panels, OCT block and frozen section from this block stained with CK18 for hepatocytes and PNAd for High Endothelial Venule in LN. 51.5% of the LN mass was identified as CK18+ hepatocytes.
- H&E shows normal microvascularization present in the pig ectopic liver
- C Top panel, macroscopic view of mouse peritoneal space showing the greater omentum (O) covering the stomach (S) and intestine (I), adjacent to the liver (L) and above the pancreas (not shown).
- Middle panel mouse omentum under dissecting microscope showing abundant vasculature.
- Lower panel cartoon depiction of the omentum showing vascular trees feeding the milky spots.
- D IP transplantation of GFP+ hepatocyte.
- FIGURE 4 Omental milky spots in a mouse.
- FIGURE 5 Engraftment of transplanted hepatocytes in omental milky spots.
- the hepatocytes are GFP labeled and present as bright areas of green fluorescence.
- ER- TR7 is an antigen found in the extracellular matrix of lymphoid tissues, fluorescent blue in this image (indicated by arrows).
- FIGURE 6 Omental milky spots are lacking in FRGN (Fah 7" Rag2/YC 7" Nod) mice. Immunofluorescent staining of wild type (left) and FRGN omentum, milky spots ("MS”) labeled.
- FIGURE 7 Engraftment of hepatocytes in omentum of FRGN mice.
- FIGURE 8 Engrafted hepatocytes in the omentum are not observed to grow in FRGN mice over a 12 week period.
- FIGURE 9 Milky spots are restored in the omentum of FRGN mice by bone marrow transplantation.
- FIGURE 10 Milky spots are restored in the omentum of FRGN mice by bone marrow transplantation. Note arrow in right panel showing engrafted hepatocytes in milky spot.
- FIGURE 11 Ectopic liver formation in FRGN mice after bone marrow transplantation.
- FIGURE 12 Ectopic liver formation in FRGN mice after bone marrow transplantation. Left panel shows result without bone marrow transplantation - hepatocyte aggregation but no ectopic liver formation is seen. Right panel shows result with bone marrow transplantation, generation of an ectopic liver.
- FIGURE 13 Stromal cells/Lymphoid tissue inducer interaction (left) and NIK signal pathway (right).
- FIGURE 14 Schematic of studies to test the impact of NIK function on rescue of liver function by intraperitoneal (IP) versus splenic (SP) injection in NIK-deficient (aly/aly) and control Fah 7" mice.
- IP intraperitoneal
- SP splenic
- FIGURE 14 Kaplan Meier survival curves of Fah-/- mice and aly/aly Fah-/- mice transplanted with 10 6 hepatocytes by splenic (SP) injection (left) or IP injection (right).
- FIGURE 15 NIK function is required to rescue the Fah 7" mouse by IP injection.
- 10 6 GFP+ hepatocytes were inoculated by IP injection into Fah 7" mice and into the alymphoplasia Fah 7" mice (aly/aly Fah 7" ) respectively.
- FIGURE 16 Schematic representation of the observed outcome after IP hepatocyte transplantation.
- FIGURE 17A-D (A) Distribution of podoplanin (PDPLN) and CD31 in fibroblastic reticular cells ("FRC"), lymphatic endothelial cells (LEC), and brain endothelial cells (BEC), and flow cytometric analysis of these markers in lymph nodes as compared to milky spots.
- FRC fibroblastic reticular cells
- LEC lymphatic endothelial cells
- BEC brain endothelial cells
- flow cytometric analysis of these markers in lymph nodes as compared to milky spots.
- B Hepatocytes establish themselves in close proximity to ER-TR7 stromal cells in milky spots.
- C Isolated stromal cells, transplanted IP, will migrate back to omental milky spots.
- D Milky spot with transplanted hepatocytes.
- FIGURE 18 Immunofluorescent studies demonstrating that hepatocytes are lymphotoxin alpha and beta positive and stromal cells are NIK and lymphotoxin beta receptor positive.
- FIGURE 19 Wild-type GFP+ (Green Fluorescent Protein) hepatocytes transplanted intraperitoneally into either Fah _/" or Fah/LTbR " " mice after 2, 4 and 6 weeks. The pictures show engraftment in the omentum of these animals.
- GFP+ Green Fluorescent Protein
- FIGURE 20A-G (A) Top, from left to right, images of human fetal kidney, jejunal LNs after kidney fragment transplantation, and LNs 3 weeks after transplantation. Middle left, H&E-stained section of paraffin-embedded donor human fetal kidney.
- C Representative 3D reconstruction of an 8-week graft. Left, image of engrafted glomeruli and tubules inside the LN. Right, image with glomeruli and tubules only.
- D 10,000 kDa MW Texas Red Dextran accumulation in 11 -week mouse bearing graft.
- E Representative immunofluorescence stainings of 1-, 3- and 8-week graft sections for mouse and human CD31.
- F Left, representative
- FIGURE 21 Schematic representation of the canonical and non-canonical NF- KB signaling pathways.
- FIGURE 22A-G (A) Left, schematic view of the experimental plan. Mice were injected IP with lOC ⁇ g LTpR-Fc or Control Ig two days before receiving transplantation of embryonic GFP+ kidney fragments into their LNs (Day 1). Mice were treated again at Day 8 and 15. LNs were collected at Day 22. Right, whole mount kidney-bearing LNs isolated from treated or untreated mice. (B) Representative immunofluorescence stainings of serial sections of kidney grafts as in A for PDPLN, LTL, CD31, CD 105, Ly- 76.
- C Flow cytometric profiles of fibroblast reticular cells (FRCs), lymphatic endothelial cells (LECs), and blood endothelial cells (BECs) in LN or omental stromal cell population (CD45-).
- D Representative immunofluorescence staining for PDPLN and LTpR of omental stromal cells.
- E Whole mount kidney-bearing omenta from wild type or LTpR-/- mice after transplantation of embryonic GFP+ kidneys, 6 weeks after transplantation (merged fluorescence/bright-field images on the left and dissecting scope images on the right). Neo-kidneys are shown in comparison to an adult mouse kidney.
- F Representative immunofluorescence stainings for CD31, CD105, and Ly-76 on serial sections of intraomental kidney grafts as in E.
- G Representative immunofluorescence stainings for CD31, CD105, and Ly-76 on serial sections of intraomental kidney grafts as in E.
- FIGURE 23 Peritoneal inflammation induces dramatic changes in the omentum.
- Upper panel Schematic view of the experiment. Zymosan is injected intraperitoneally (IP) on day 0. Three days later, 1 million hepatocytes are injected IP. 7 days after hepatocyte injection the samples are collected.
- Lower left panel Macroscopic view of the omentum from a zymosan induced and control animal. Lower right panel. Dramatic increase in the weight of the omentum after Zymosan induced inflammation when compared to control.
- FIGURE 24 FALCs and hepatic growth. Omentum and mesenteric fat of C57M/6 mice after zymosan or PBS injection one week after GFP+ hepatocyte transplantation. Zymosan inflammation induced FALCs number and size that allowed a dramatic increase in GFP+ hepatocyte engraftment. Omentum and mesenteric fat were compared and GFP+ hepatocytes identified under fluorescent microscope.
- FIGURE 25 Peritoneal inflammation increases survival of tyrosinemic mice after hepatocyte transplantation. Fah _/ ⁇ C57bl/6 mice with or without previous induced inflammation were transplanted IP with wild type hepatocytes followed by two selections (off NTBC). Animals without inflammation (left panel) continued to lose weight after the second selection, Animal H146 and H148 died around/at 8 weeks after transplantation. The animal with previous induced inflammation (right panel) increased weight during the second selection indicating a rescue of liver disease with restoration of functional liver mass.
- FIGURE 26 Peritoneal inflammation increases liver mass present in fat containing FALCs.
- the term “about” or “approximately” means within an acceptable error range for the particular value as determined by one of ordinary skill in the art, which will depend in part on how the value is measured or determined, i.e., the limitations of the measurement system. For example, “about” can mean within 3 or more than 3 standard deviations, per the practice in the art. Alternatively, “about” can mean a range of up to 20%, preferably up to 10%, more preferably up to 5%, and more preferably still up to 1% of a given value. Alternatively, particularly with respect to biological systems or processes, the term can mean within an order of magnitude, preferably within 5-fold, and more preferably within 2-fold, of a value.
- FALCs Fat-Associated Lymphoid Clusters
- milky spots are structures of the lymphoid system that are not lymph nodes.
- FALCs are present in a number of anatomical locations, including but not limited to the mesentery, the mediastinum, the pericardium and subcutaneous tissue (see FIGURE 1).
- FALCs are located in the adipose tissue of the pleural, pericardial and peritoneal cavity. In the peritoneal cavity, the FALC is located in the omentum and mesenteric, splenic, portal and gonadal fat of the subject.
- the FALCs used for ectopic tissue growth e.g., liver or kidney tissue growth
- the FALCs are located in the mediastinum or pericardium.
- Lymph Node refers to any lymph node for example, but not limited to, abdominal lymph nodes, celiac lymph nodes, paraaortic lymph nodes, splenic hilar lymph nodes, porta hepatis lymph nodes, gastric lymph nodes (left and right), gastroomental (gastroepiploic) lymph nodes (left and right), retroperitoneal lymph nodes, pyloric lymph nodes (suprapyloric, subpyloric, retropyloric), pancreatic lymph nodes (superior pancreatic, inferior pancreatic, splenic lineal lymph nodes), hepatic lymph nodes (cystic, foraminal-including foramen of Winslow), pancreaticoduodenal lymph nodes (superior pancreaticoduodenal, inferior pancreaticodoudenal), superior mesenteric lymph nodes, ileocolic lymph nodes, prececal lymph nodes
- Cells of an organ may be comprised of one or a plurality of cell types.
- cells are comprised of a plurality of cell types found in the originating organ, but need not necessarily comprise all cell types found in that organ.
- "liver cells" for engraftment according to the present disclosure comprise hepatocytes and may further comprise one or more of biliary cells, endothelial cells, stem cells and progenitor cells of the liver.
- "kidney cells” for engraftment according to the present disclosure comprise renal parenchymal cells and may further comprise one or more of glomerular cells, endothelial cells, stem and progenitor cells of the kidney.
- the cells are dissociated prior to introduction for engraftment. In certain embodiments, the cells are comprised in an aggregate prior to introduction. In certain embodiments, the cells are comprised of organoids expanded in vitro. In certain embodiments, the cells are comprised of iPS or other stem cells expanded in vitro. In certain embodiments, the cells are comprised in a tissue fragment obtained from an intact organ, but said fragment constitutes no more than about 5%, or no more than about 10%, or no more than about 25% or no more than about 50% of the organ.
- Activator refers to a compound or molecule ⁇ e.g., small molecule, peptide, peptidomimetic, natural compound or antibody) that activates ⁇ e.g., increases, promotes or enhances) the activity, function, expression and/or generation of a protein or pathway.
- An activator can be any compound or molecule that promotes any activity of a named protein (molecule, any molecule involved with the named molecule or a named associated molecule), such as LTpR or NIK, or promotes the interaction of a named protein, e.g., LTpR or NIK, with signaling partners or binding partners.
- Activators can also include molecules that indirectly regulate the biological activity of a named protein, e.g., LTpR or NIK, by intercepting upstream signaling molecules.
- the activator can include molecules that promote, increase and/or enhance the generation and/or production of a named protein such as LTpR or NIK, e.g., by increasing the activity and/or function of the enzymes that generate and/or produce LTpR or NIK.
- treatment and grammatical variations thereof such as “treat” or
- treating refers to clinical intervention in an attempt to alter the natural course of the individual being treated, and can be performed either for prophylaxis or during the course of clinical pathology. Desirable effects of treatment include, but are not limited to, preventing occurrence or recurrence of disease, alleviation of symptoms, diminishing any direct or indirect pathological consequences of the disease, decreasing the rate of disease progression, amelioration or palliation of the disease state and remission or improved prognosis. In certain embodiments, “treatment” can refer to a decrease in the severity of complications, symptoms and/or deterioration.
- the decrease can be a 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%), 98%) or 99% decrease in severity of complications, symptoms and/or deterioration, for example relative to a comparable control subject not receiving the treatment.
- treatment can also mean prolonging survival as compared to expected survival if treatment is not received.
- a “therapeutically effective amount” or “effective amount” as used herein, refers to an amount that is able to achieve one or more of the following: alleviation of symptoms, decreasing the rate of disease progression, prolongation of survival, amelioration or palliation of the disease state and/or improved prognosis.
- a “subject” or “individual,” as used interchangeably herein, can refer to a human or a non-human subject.
- Non-limiting examples of non-human subjects include non- human primates, dogs, cats, horses, mice, rats, hamsters, rabbits, swine, etc.
- transplantation refers to the introduction of cells to a target tissue, e.g., FALCs or tissues that contain FALCs.
- “In combination with,” as used herein, can mean that one or more cells to be grafted or a composition thereof, and an agent, e.g., an activator of the LTpR and/or NIK signaling pathway, are administered to a subject as part of a treatment regimen or plan.
- being used in combination does not require that the one or more cells and the one or more agents are physically combined prior to administration or that they be administered over the same time frame.
- the one or more cells to be grafted and the one or more agents can be administered concurrently to the subject being treated, or can be administered at the same time or sequentially in any order or at different points in time.
- methods of the present disclosure can include the administration of one or more agents prior to administration of the one or more cells to be grafted, e.g., hepatocytes or kidney cells.
- the present disclosure relates to the engraftment and proliferation of cells in fat-associated lymphoid clusters ("FALCs" or "milky spots”) to develop ectopic tissue.
- FALCs fat-associated lymphoid clusters
- milky spots milky spots
- the present disclosure provides methods of generating ectopic tissue in or around a FALC.
- the method for generating ectopic tissue can comprise introducing a cell, e.g., a hepatocyte or a kidney cell, into a FALC of a subject to form an ectopic tissue, e.g., an ectopic liver tissue or an ectopic kidney tissue.
- the methods for generating an ectopic tissue can comprise introducing a cell in a lymph node of the subject.
- the methods of the present disclosure can be used to treat a medical condition and/or disorder (e.g., pathology, disease, syndrome) which may benefit from the generation of the ectopic tissue.
- the subject can be suffering from a disease or disorder such as, but not limited to, liver disease and/or failure or kidney disease and/or failure.
- the subject can be human or non-human.
- non-humans include non-human primates, dogs, cats, horses, mice, rats, hamsters, rabbits, swine, etc.
- the subject is human.
- the cells to be grafted into the FALCs of a subject can be human cells, non-human cells or both. In certain embodiments, the cells are human cells. In certain embodiments, human cells can be grafted into the FALCs, or a region that contains FALCs, of a non-human subject, e.g., mouse.
- the cells for engraftment can be obtained from the subject that is undergoing the graft.
- the cells can be obtained from a source other than the subject that is undergoing the graft.
- the cells can be obtained from fresh or frozen cell populations.
- the cells can be isolated from tissue and grown in vitro under various culture conditions prior to transplantation.
- the cells can be obtained from embryonic, fetal, pediatric or adult tissue.
- the cells can be progenitor or precursor cells.
- the progenitor or precursor cells can be differentiated into the type of cell to be transplanted.
- the cells for use according to the present disclosure can be prepared by any means known in the art.
- cell solutions e.g., compositions disclosed herein
- Non-limiting examples of compositions for use in the disclosed methods are described in Section 5.3 below.
- the cells can be prepared according to the method of Li et al. J Tissue Culture Methods 14: 139-146 (1992). Briefly, isolation involves collagenase perfusion of a sample of limited size ( ⁇ 50 g) with only one cut surface.
- specifically enriched cell populations can be used such as those disclosed in U.S. Pat. No. 7,211,404.
- the cells can be administered to the subject by any method known in the art.
- the cells can be injected, including but not limited to,
- the cells can be surgically engrafted, e.g., by conventional or endoscopic surgical techniques.
- the cells can be locally administered.
- cells can be introduced into the proximity of an anatomical location that contains FALCs, such as, but not limited to, the gonads, the omentum, the mesentery, the mediastinum, the pericardium and subcutaneous tissue.
- the anatomical region is the omentum.
- hepatocytes or kidney cells can be introduced into proximity of the omentum (and FALCs residing there), for example by targeted intraperitoneal injection or by conventional or endoscopic surgical techniques.
- the cells to be engrafted may be initially expanded in culture before introduction into a FALC or lymph node in vivo.
- the cells can be suspended in any appropriate buffer for injection.
- buffers include saline, phosphate buffered saline, Hank's salt and Ringer's solution, among others.
- the method for generating an ectopic tissue in or around a FALC or lymph node can further comprise providing an agent that promotes the formation of the ectopic tissue.
- the methods can include administering one or more cells to be grafted in combination with one or more agents that promote the formation of the ectopic tissue.
- the one or more agents can be included in the composition that includes the one or more cells to be grafted.
- the one or more agents can be administered prior to, after or concurrently with the grafting of the one or more cells.
- the agent promotes the proliferation and/or vascularization of the one or more cells to form the ectopic tissue.
- Analogous methods may be used to generate an ectopic tissue in a lymph node.
- the agent that promotes the formation of ectopic tissue can be a cell type different from that of the cells, e.g., kidney cells or hepatocytes, that form the ectopic tissue.
- the agent includes one or more of bone marrow-derived cells and/or stromal cells.
- the agent includes stromal cells, e.g., fibroblasts, fibroblastic reticular cells (FRCs), folicular dendritic cells (FDCs), lymphatic endothelial cells (LECs), blood endothelial cells (BECs), alpha-7 integrin pericytes (AIPs) and double negative cells (DNCs).
- stromal cells e.g., fibroblasts, fibroblastic reticular cells (FRCs), folicular dendritic cells (FDCs), lymphatic endothelial cells (LECs), blood endothelial cells (BECs), alpha-7 integrin pericytes (AIPs) and double negative cells (DNCs).
- the fibroblasts can be human foreskin fibroblasts, human embryonic fibroblasts, mouse embryonic fibroblasts, skin fibroblasts cells, vascular fibroblast cells, myofibroblasts, smooth muscle cells, mesenchymal stem cells (MSCs
- a method for generating ectopic tissue can comprise (a) introducing one or more cells, e.g., hepatocytes or kidney cells, into a FALC (or an anatomical region containing the FALC) or lymph node (or an anatomical region containing the lymph node) of a subject to form an ectopic tissue, e.g., an ectopic liver tissue or an ectopic kidney tissue, and (b) introducing one or more bone marrow-derived cells and/or stromal cells to promote the formation of ectopic tissue, e.g., by promoting the proliferation and/or vascularization of the one or more cells to form the ectopic tissue.
- the one or more cells to be grafted and the one or more bone marrow-derived cells and/or stromal cells can be included in the same composition.
- the stromal cells e.g., stromal endothelial cells or fibroblasts, that promote the formation of ectopic tissue may express detectable levels of one or more of podoplanin, lymphotoxin beta receptor ("LTpR"), NIK or a combination thereof.
- the stromal cells can be treated with an activator of the LTpR and/or NIK signaling pathway, e.g., an activator of LTpR or NIK or downstream targets thereof, prior to, during or after administration to the subject.
- stromal cells e.g., stromal endothelial cells or fibroblasts
- the stromal cells can be genetically modified to exogenously express LTpR and/or NIK and/or overexpress LTpR and/or NIK.
- the agent that promotes the formation of ectopic tissue e.g., by promoting the proliferation and/or vascularization of the one or more cells to form the ectopic tissue, can be an activator of the LTpR and/or NIK signaling pathway.
- the method of generating ectopic tissue in or around a FALC or lymph node can comprise introducing a cell, e.g., a hepatocyte or a kidney cell into a FALC (or an anatomical region containing the FALC) or lymph node of a subject and providing at least one activator of the LTpR and/or NIK signaling pathway, wherein the activation of LTpR and/or NIK or downstream targets thereof promotes formation of the ectopic tissue, e.g., an ectopic liver tissue or an ectopic kidney tissue.
- a cell e.g., a hepatocyte or a kidney cell into a FALC (or an anatomical region containing the FALC) or lymph node of a subject and providing at least one activator of the LTpR and/or NIK signaling pathway, wherein the activation of LTpR and/or NIK or downstream targets thereof promotes formation of the ectopic tissue, e.g
- the activator of the LTpR and/or NIK signaling pathway is an activator of LTpR and/or NIK or an activator of the non-canonical NF- ⁇ signaling pathway.
- the one or more cells to be grafted and the activator of the LTpR and/or NIK signaling pathway can be included in the same composition.
- the activator can be administrated prior to, during or after introduction of the one or more cells to be grafted into the subject.
- the activator of the LTpR and/or NIK signaling pathway can increase expression of LTpR or NIK in a cell, e.g., a stromal cell or stromal endothelial cell, present in the subject that is undergoing the graft.
- a cell e.g., a stromal cell or stromal endothelial cell
- the activator of the LTpR and/or NIK signaling pathway activates the signaling pathway in stromal cells present in the FALC of the subject.
- the cells to be grafted can be a heterogeneous cell population, e.g., a composition comprising a heterogeneous cell population, that includes stromal cells or stromal endothelial cells, and the activator of the LTpR and/or NIK signaling pathway can increase expression of LTpR or NIK in the stromal cells or stromal endothelial cells present in the composition to be grafted.
- a heterogeneous cell population e.g., a composition comprising a heterogeneous cell population, that includes stromal cells or stromal endothelial cells
- the activator of the LTpR and/or NIK signaling pathway can increase expression of LTpR or NIK in the stromal cells or stromal endothelial cells present in the composition to be grafted.
- a method for generating ectopic tissue can comprise (a) introducing one or more cells, e.g., hepatocytes or kidney cells, into a FALC or lymph node of a subject to form an ectopic tissue, e.g., an ectopic liver tissue or an ectopic kidney tissue, (b) introducing one or more bone marrow-derived cells and/or stromal cells to promote the proliferation and/or vascularization of the one or more cells to form the ectopic tissue and (c) administering an activator of the LTpR and/or NIK signaling pathway.
- cells e.g., hepatocytes or kidney cells
- the activator of the LTpR and/or NIK signaling pathway is present in the composition that includes the one or more cells to be grafted and the one or more bone marrow-derived cells and/or stromal cells or the activator of the LTpR and/or NIK signaling pathway is present in the composition that includes the one or more bone marrow-derived cells and/or stromal cells.
- the activator of the LTpR and/or NIK signaling pathway can be an activator of LTpR or a downstream target of LTpR. In certain embodiments, the activator can be an activator of NIK or a downstream target of NIK, e.g., an activator of the non-canonical NF- ⁇ signaling pathway. In certain embodiments, the activator of the LTpR and/or NIK signaling pathway can be an agonist antibody (or antibody fragment thereof) or single chain antibody that specifically binds to LTpR or NIK.
- Non- limiting examples of anti-LTpR agonist antibodies include the monoclonal antibody produced by Adipogen Life Sciences., catalog number AG-20B-0008, the anti-LTpR agonist antibody CBE11 (see, e.g., Lukashev et al., Cancer Res. 66(19):9617-9624 (2006)), the anti-LTpR agonist antibody BS-1 (see, e.g., Hu et al., Carcinogenesis 34(5): 1105-1114 (2013)) and the anti-LTpR agonist antibody 4H8 (see, e.g., Scarzello et al., Gut 65: 1765-1775 (2016)). Additional non-limiting examples of anti-LTpR agonist antibodies are disclosed in U.S. Patent Publication No.
- the activator of the LTpR and/or NIK signaling pathway can be a small molecule that increases function and/or activity of LTpR or NIK or a downstream target thereof
- the present disclosure provides a method for generating an ectopic tissue in a subject comprising introducing one or more cells into a FALC or lymph node of the subject and providing an activator of LTpR and/or NIK, wherein activation of LTpR and/or NIK promotes the proliferation and/or vascularization of the one or more cells to generate the ectopic tissue.
- the one or more cells comprise a hepatocyte and the ectopic tissue comprises an ectopic liver tissue.
- the one or more cells comprise a kidney cell and the ectopic tissue comprises an ectopic kidney tissue.
- the one or more cells further comprise one or more stromal cells and the activator of LTpR and/or NIK results in activation of the LTpR and/or NIK signaling pathway in the stromal cells.
- the agent that promotes the formation of ectopic tissue can be an agent that promotes inflammation in the subject.
- the method for generating an ectopic tissue in or around a FALC or lymph node can further include inducing inflammation in the subject, e.g., by administration of an agent that promotes inflammation in the subject.
- agents include cytokines, vasodilators, histamine, serotonin, bradykinin and zymosan.
- Non-limiting examples of cytokines include IL-1, IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL- 8, IL-9, IL-10, IL-11, IL-12, IL-13, IL-15, IL-17, IL-18, IL-21, IL-23, IL-24, IL-27, IFN- alpha, IFN-alpha2, IFN-beta, or IFN-gamma, TNF-alpha and TNF-beta, TGF-alpha and TGF-beta, Lymphotoxin-alpha and Lymphotoxin-beta.
- Non-limiting examples of chemokines include CCL18, CCL19, CCL21, CXCL8, CCL2, CCL3, CCL4, CCL5 CCL7, CXCL12 and CXCL13.
- the agent comprises a compound and/or molecule that activates the complement system.
- the agent comprises zymosan.
- the agent is administered in and/or around the FALCs that were or are to be grafted with the cells.
- inflammation is induced locally, e.g., in or around the anatomical region that contains FALCs or the lymph node where the cells were or are to be transplanted. Alternatively and/or additionally, the inflammation is induced
- the inflammation is temporary.
- the inflammation lasts for no longer than about 10 weeks, no longer than about 9 weeks, no longer than about 8 weeks, no longer than about 7 weeks, no longer than about 6 weeks, no longer than about 5 weeks, no longer than about 4 weeks, no longer than about 3 weeks, no longer than about 2 weeks, no longer than about 1 week, no longer than about 6 days, no longer than about 5 days, no longer than about 4 days or no longer than about 3 days.
- inflammation is induced prior to the introduction of the one or more cells to be grafted.
- inflammation is induced at least 2 hours before, at least 4 hours before, at least 6 hours before, at least 8 hours before, at least 10 hours before, at least 12 hours before, at least 14 hours before, at least 16 hours before, at least 18 hours before, at least 20 hours before, at least 22 hours before, 1 day before, at least 2 days before, at least 3 days before, at least 4 days before, at least 5 days before, at least 6 days before, at least 7 days before, at least 8 days before, at least 9 days before or at least 10 days before the introduction of the one or more cells to be grafted.
- inflammation is induced after the introduction of the one or more cells to be grafted.
- inflammation is induced at least 10 minutes after, at least 30 minutes after, at least 1 hour after, at least 2 hours after, at least 4 hours after, at least 6 hours after, at least 8 hours after, at least 10 hours after, at least 12 hours after, at least 14 hours after, at least 16 hours after, at least 18 hours after, at least 20 hours after, at least 22 hours after, 1 day after, at least 2 days after, at least 3 days after, at least 4 days after, at least 5 days after, at least 6 days after, at least 7 days after, at least 8 days after, at least 9 days after or at least 10 days after the introduction of the one or more cells to be grafted.
- the cell e.g., hepatocyte or kidney cells
- transplant recipients may be additionally administered with immunosuppressive agents in order to minimize immune rejection of the grafted cells, e.g., hepatocytes or kidney cells.
- Immunosuppressive agents can reduce or prevent an adverse immune response in the recipient mammal to the foreign or grafted tissue by inhibiting or suppressing any innate immune system activity, including, but not limited to, T-cell and/or B-cell activity.
- Immunosuppressive agents may include, but is not limited to, the administration of radiation therapy and/or the administration of immunosuppressive drugs.
- suitable immunosuppressive drugs include, but are not limited to, steroids (such as corticosteroids, dexamethasone, and prednisone), Cox-1 and Cox -2 inhibitors, macrolide antibiotics (such as rapamycin and tacrolimus), and other substances that limit, reduce, or suppress B-cell, T-cell, and/or other innate immune activity.
- immunosuppressive agents particularly suitable for use with the present disclosure include those immunosuppressive agents known for use with liver and/or kidney transplantation, including, but not limited to, steroids, cyclosporine, rapamycin, azathioprine, prednisone, and OKT3.
- hepatocyte graft recipients are administered with the immunosuppressive agent tacrolimus, also called FK506, a calcineurin inhibitor that in turn may inhibit IL-2 production and downstream B-lymphocyte activation.
- a subject is not administered an
- immunosuppressive agent for example, an agent set forth above in this paragraph (for example, but not by limitation, where autologous hepatocytes or kidney cells are transplanted).
- the present disclosure provides methods of treating a subject in need of augmented liver function.
- the present disclosure provides methods of propagating hepatocytes in FALCs or lymph nodes for the purpose of producing ectopic liver tissue, which can be used in a subject for therapeutic benefit, e.g., in a subject with reduced liver function.
- the FALCs are located in the omentum.
- a subject in need of augmented liver function is a subject lacking sufficient functional liver to maintain a healthy state, including but not limited to a subject having a fibrotic and/or cirrhotic liver, or a liver damaged by disease, trauma or toxic effect.
- a healthy state is evidenced by one or more liver function parameter falling within a normal range for the subject.
- liver function parameters include albumin level, alanine transaminase ("ALT”) level, aspartate transaminase (“AST”) level, creatinine level, total bilirubin level, direct bilirubin level, phenylalanine level, alanine level, glycine level, valine level, glutamate level, prothrombin time, lactate dehydrogenase and alkaline phosphatase; normal ranges for these levels are known in the art for various subjects, including human subjects.
- an elevation of one or more, or two or more, or three or more of said parameters by at least about 25% or by at least about 50% relative to normal levels indicates a need for augmented liver function.
- Achieving augmented liver function in the subject means moving toward the normal range in at least one liver function parameter, for example, but not by limitation, improving by at least about 10 percent or at least about 20 percent or at least about 30 percent or at least about 40 percent or at least about 50 percent.
- augmented liver function is indicated by a prolongation of survival of a subject, for example by at least about 20% or at least about 30%.
- the subject in need of augmented liver function can be suffering from a liver disease, a liver disorder, liver failure and/or reduced liver function.
- liver diseases and/or disorders that can be treated by the methods of the present disclosure include metabolic disorders, Crigler-Najjar syndrome type I, acute liver failure, cirrhosis, hemochromatosis, hyperoxaluria, oxalosis, Wilson's disease, Alpha-1 antitrypsin deficiency, liver cancer, hepatitis (alcoholic and
- Non-limiting examples of diseases and/or disorders related to the biliary system (and indirectly to the liver) that can be treated by the methods of the present disclosure include primary biliary cirrhosis and primary sclerosing cholangitis.
- the present disclosure provides for a method of treating a subject in need of augmented liver function, comprising
- hepatocytes administering, to the subject, a therapeutically effective amount of hepatocytes, wherein at least one of the administered hepatocytes proliferates in or around a FALC or lymph node and generates an ectopic liver tissue, whereby the liver function of the subject is augmented.
- the hepatocytes transplanted into the subject can be human hepatocytes, non-human hepatocytes or both.
- a hepatocyte may be syngeneic or allogeneic to the intended recipient.
- the hepatocyte is autologous to the intended recipient (for example, was harvested and expanded in culture prior to transplant, or was generated from a precursor cell or stem cell of the intended recipient).
- a hepatocyte of one species may be transplanted into another species, for example, but not limited to, a human hepatocyte transplanted into a non-human (e.g. , mouse) host.
- non-human hepatocytes can be grafted in FALCs of a human recipient.
- An effective amount or therapeutically effective amount of hepatocytes to be grafted can comprise between about 10 4 and 10 11 hepatocytes, or between about 10 5 and 10 10 hepatocytes or an amount found to be effective in resulting in at least one site of ectopic liver tissue in a FALC or lymph node.
- an effective amount of hepatocytes may comprise one or more hepatocytes.
- 1 1 11 1 10 1 to about 10 , of about 10 to about 10 , of about 10 to about 10 , of about 10 to about 10 9 or of about 10 7 to about 10 8 hepatocytes can be administered to the subject.
- the hepatocytes can be administered to a subject more than once to achieve the desired ectopic liver tissue.
- the hepatocytes can be administered to the subject at least two times, at least three times or at least four times.
- the hepatocytes can be grafted to two or more different anatomical regions that contain FALCs or lymph nodes to obtain two or more ectopic liver tissues.
- the present disclosure provides for a method of treating a subject in need of augmented liver function, comprising
- the agent can be for example, but not limited to, a plurality of bone marrow-derived cells and/or a plurality of stromal cells.
- the agent can be an activator of the LTpR and/or NIK signaling pathway, e.g., an activator of LTpR or NIK or downstream targets thereof, as described above.
- the agent can be bone marrow-derived cells, stromal cells, an activator of the LTpR and/or NIK signaling pathway or combinations thereof.
- Analogous methods may be used to generate an ectopic tissue in a lymph node to augment liver function.
- the present disclosure provides for a method of generating an ectopic liver tissue comprising introducing, into a FALC, a hepatocyte, and providing at least one agent that promotes the formation of an ectopic liver tissue, for example as set forth above.
- a method for treating a subject in need of augmented liver function comprising (a) administering, to the subject, a therapeutically effective amount of hepatocytes into a FALC of a subject to form an ectopic liver tissue, and (b) administering, to the subject, one or more bone marrowderived cells and/or stromal cells to promote the formation of the ectopic liver, e.g., by promoting the proliferation and/or vascularization of the one or more cells to form the ectopic liver tissue.
- Analogous methods may be used to generate an ectopic tissue in a lymph node.
- a method for treating a subject in need of augmented liver function can comprise (a) administering, to the subject, a
- hepatocytes into a FALC of a subject to form an ectopic liver tissue
- administering to the subject, an activator of the LTpR and/or NIK signaling pathway to promote the formation of the ectopic liver tissue.
- Analogous methods may be used to generate an ectopic tissue in a lymph node to augment liver function.
- a method for treating a subject in need of augmented liver function can comprise (a) administering, to the subject, a
- hepatocytes into a FALC of a subject to form an ectopic liver tissue
- administering to the subject, one or more bone marrow-derived cells and/or stromal cells to promote the formation of the ectopic liver, e.g., by promoting the proliferation and/or vascularization of the one or more cells to form the ectopic liver tissue
- administering an activator of the LTpR and/or NIK signaling pathway.
- Analogous methods may be used to generate an ectopic tissue in a lymph node to augment liver function.
- the method for treating a subject in need of augmented liver function can further include inducing inflammation in the subject.
- inflammation can be induced by the administration of an agent that promotes inflammation to the subject, as disclosed above.
- inflammation is induced prior to the introduction of the one or more hepatocytes to be grafted, as described above.
- the disclosed method is performed in vivo, as described above. In certain embodiments, it is performed in vitro/ex vivo, for example as a cultured tissue explant. In certain non-limiting embodiments, the presently disclosed subject matter provides for liver tissue produced in such an in vitro/ex vivo method, for example for later transplant into a subject needing augmented liver function.
- the present disclosure provides methods of treating a subject in need of augmented kidney function.
- the present disclosure provides methods of propagating kidney cells or fragments of kidney tissue in FALCs or lymph nodes for the purpose of producing ectopic kidney tissue, which can be used in a subject for therapeutic benefit, e.g., in a subject with reduced kidney function.
- the FALCs are located in the omentum.
- a subject in need of augmented kidney function is a subject lacking sufficient functional kidney to maintain a healthy state, including but not limited to a subject having kidney failure, or a kidney damaged by disease, trauma or toxic effect.
- a healthy state is evidenced by one or more kidney function parameters falling within a normal range for the subject.
- kidney function parameters include creatinine level, protein level and albumin level; normal ranges for these levels are known in the art for various subjects, including human subjects.
- an elevation of one or more, or two or more, or three of said parameters by at least about 25% or by at least about 50% relative to normal levels indicates a need for augmented kidney function.
- Achieving augmented kidney function in the subject means moving toward the normal range in at least one kidney function parameter, for example, but not by limitation, improving by at least about 10 percent or at least about 20 percent or at least about 30 percent or at least about 40 percent or at least about 50 percent.
- a reduction in a subject's glomerular filtration rate (GFR) is indicative of reduced kidney function.
- GFR glomerular filtration rate
- a reduction of about 10%, about 20%, of about 30%), of about 40% or of about 50% in a subject's GFR is indicative of reduced kidney function.
- the engrafted cells are capable of producing a concentrated urine.
- augmented kidney function is indicated by a prolongation of survival of a subject, for example by at least about 20% or at least about 30%.
- the subject in need of augmented kidney function can be suffering from a kidney disease, a kidney disorder, kidney failure and/or reduced kidney function.
- kidney diseases and/or disorders that can be treated by the methods of the present disclosure include acute kidney failure, chronic kidney disease, glomerulonephritis, Lupus, polycystic kidney disease, nephropathy, nephrosis, kidney malformations and kidney cancer.
- Other non-limiting examples related to kidney diseases are diminished erythropoiesis, lack of activated Vitamin D and atypical nonthyroidal illnesses.
- the present disclosure provides for a method of treating a subject in need of augmented kidney function, comprising administering, to the subject, a therapeutically effective amount of kidney cells, wherein at least one of the administered kidney cells proliferates in or around a FALC or lymph node and generates an ectopic kidney tissue, whereby the kidney function of the subject is augmented.
- kidney cells or fragments of kidney tissue are grafted in or around a FALC or lymph node to generate ectopic kidney tissue.
- the kidney cells or fragments of kidney tissue transplanted into the subject can be human or non-human cells.
- non-human kidney cells include non-human primate kidney cells and kidney cells from various non-human animals such as dogs, cats, horses, mice, rats, hamsters, rabbits, swine, etc.
- the kidney cells or fragments of kidney tissue can be syngeneic or allogeneic to the intended recipient.
- the kidney cell and/or kidney tissue fragment is autologous to the intended recipient (for example, was harvested and expanded in culture prior to transplant, or was generated from a precursor cell or stem cell of the intended recipient).
- the kidney cells are fetal kidney cells or tissue, e.g., metanephroi.
- the kidney cells are not metanephroi, e.g., intact metanephroi.
- the kidney cells can be renal progenitor cells.
- a kidney cell and/or kidney tissue fragment of one species may be transplanted into another species, for example, but not limited to, a human kidney cell transplanted into a mouse host.
- non-human kidney cells and/or kidney tissue fragments can be grafted in FALCs of a human recipient.
- an effective amount of kidney cells may comprise between about 10 4 and 10 11 kidney cells, or between about 10 5 and 10 10 kidney cells or an amount found to be effective in resulting in at least one site of ectopic kidney tissue in a FALC. In certain embodiments, an effective amount of kidney cells may comprise one or more kidney cells.
- the kidney cells and/or kidney tissue fragments can be administered to a subject more than once to achieve the desired ectopic kidney tissue.
- the kidney cells and/or kidney tissue fragments can be administered to the subject at least two times, at least three times or at least four times.
- the kidney cells and/or kidney tissue fragments can be grafted to two or more different anatomical regions that contain FALCs or lymph nodes to obtain two or more ectopic kidney tissues.
- the present disclosure further provides for a method of treating a subject in need of augmented kidney function, comprising administering, to the subject, a therapeutically effective amount of kidney cells (or a fragment of kidney tissue), and promoting the proliferation of a kidney cell in a fat-associated lymphoid cluster or lymph node of the subject.
- a therapeutically effective amount of kidney cells or a fragment of kidney tissue
- such proliferation may be promoted, for example and not by limitation, by administering the kidney cells locally to the anatomic region containing the FALC or lymph node targeted for ectopic kidney tissue formation, and/or by providing at least one agent that promotes the formation of an ectopic kidney tissue.
- the agent can be, for example, but not limited to, a plurality of bone marrow-derived cells and/or a plurality of stromal cells or stromal endothelial cells.
- the agent can be an activator of the LTpR and/or NIK signaling pathway, e.g., an activator of LTpR or NIK or downstream targets thereof.
- the agent can be an activator of the non- canonical NF-KB signaling pathway.
- the agent can be bone marrow-derived cells, stromal cells, an activator of the LTpR and/or NIK signaling pathway, an activator of the non-canonical NF- ⁇ signaling pathway or combinations thereof.
- the present disclosure provides for a method of generating an ectopic kidney tissue comprising introducing, into a FALC, a composition comprising kidney cells, and providing at least one agent that promotes the formation of an ectopic kidney tissue, for example as set forth above.
- a method for treating a subject in need of augmented kidney function comprising (a) administering, to the subject, a therapeutically effective amount of kidney cells or kidney tissue fragments into a FALC of a subject to form an ectopic kidney tissue, and (b) administering, to the subject, one or more bone marrow-derived cells and/or stromal cells to promote the formation of the ectopic kidney, e.g., by promoting the proliferation and/or vascularization of the one or more cells to form the ectopic kidney tissue.
- Analogous methods may be used to generate an ectopic tissue in a lymph node.
- a method for treating a subject in need of augmented kidney function comprising (a) administering, to the subject, a
- kidney cells or kidney tissue fragments into a FALC or lymph node of a subject to form an ectopic kidney tissue, and (b) administering, to the subject, one or more bone marrow-derived cells and/or stromal cells to promote the formation of the ectopic kidney, e.g., by promoting the proliferation and/or
- vascularization of the one or more cells to form the ectopic kidney tissue may be used to generate an ectopic tissue in a lymph node to augment kidney function.
- a method for treating a subject in need of augmented kidney function can comprise (a) administering, to the subject, a
- kidney cells or kidney tissue fragments into a FALC or lymph node of a subject to form an ectopic kidney tissue, (b) administering, to the subject, an activator of the LTpR and/or NIK signaling pathway to promote the formation of the ectopic kidney tissue.
- Analogous methods may be used to generate an ectopic tissue in a lymph node to augment kidney function.
- the method for treating a subject in need of augmented kidney function can further include inducing inflammation in the subject.
- inflammation can be induced by the administration of an agent that promotes inflammation to the subject, as disclosed above.
- inflammation is induced prior to the introduction of the one or more hepatocytes to be grafted, as described above.
- the disclosed method is performed in vivo, as described above. In certain embodiments, it is performed in vitro/ex vivo, for example as a cultured tissue explant. In certain non-limiting embodiments, the presently disclosed subject matter provides for kidney tissue produced in such an in vitro/ex vivo method, for example for later transplant into a subject needing augmented kidney function.
- compositions for generating ectopic tissue that include one or more cells and one or more agents that can be used to promote the formation of an ectopic tissue from the one or more cells.
- the one or more cells present in the composition comprise hepatocytes. In certain embodiments, the one or more cells present in the composition comprise kidney cells. In certain embodiments, hepatocytes or kidney cells may be prepared for transplantation, and/or transplantation procedures may be carried out using methodology described in, United States Patent No. 9,125,891, incorporated by reference herein.
- the cells suitable for use in the present disclosure can be derived from any suitable source.
- the cells can be derived from an autologous source.
- the cells can be derived from the subject to be implanted with the cells.
- the cells can be derived from a heterologous source.
- the cells can be derived an individual different from the subject to be implanted with the cells.
- the cells e.g., hepatocytes or kidney cells, can also be generated from stem cells derived from various sources that are then differentiated into the relevant cell type.
- cells can be cultured for a period of time under various conditions to induce certain phenotypes before use in the presently disclosed compositions and/or methods.
- a composition can include at least about 1, about 2, about 3, about 4, about 5, about 10, about 15, about 20, about 25, about 30, about 35, about 50, about 100, about 150, about 200, about 300, about 400, about 500, about 1000, about 10,000, about 100,000 or about 1,000,000 cells, e.g., hepatocytes or kidney cells.
- a composition can include from about 10 4 to about 10 11 cells, e.g., hepatocytes or kidney cells.
- the present disclosure provides for a composition for generating an ectopic liver or treating a subject that needs augmented liver function.
- the composition comprises a plurality of hepatocytes and one or more of the following agents that promote the formation of an ectopic liver.
- the agent can be one or more cells that are not hepatocytes.
- the one or more agents can include a plurality of bone marrow-derived cells and/or a plurality of stromal cells.
- the bone marrow-derived cells can be hematopoietic stem cells.
- the stromal cells can be fibroblast or fibroblast-like cells, such as fibroblastic reticular cells (FRCs), folicular dendritic cells (FDCs), lymphatic endothelial cells (LECs), blood endothelial cells (BECs), alpha-7 integrin pericytes (AIPs) and double negative cells (DNCs).
- FRCs fibroblastic reticular cells
- FDCs folicular dendritic cells
- LECs lymphatic endothelial cells
- BECs blood endothelial cells
- AIPs alpha-7 integrin pericytes
- DNCs double negative cells
- the present disclosure provides for a composition for generating an ectopic kidney or treating a subject that needs augmented kidney function.
- the present disclosure provides for a composition for generating an ectopic kidney comprising a plurality of kidney cells (or a fragment of kidney tissue) and one or more of the agents that promote the formation of an ectopic kidney.
- the agent can be one or more cells that are not kidney cells.
- the one or more agents can include a plurality of bone marrow-derived cells and a plurality of stromal cells.
- the bone marrow-derived cells can be hematopoietic stem cells.
- the stromal cells can be fibroblast or fibroblast-like cells, such as fibroblastic reticular cells (FRCs), folicular dendritic cells (FDCs), lymphatic endothelial cells (LECs), blood endothelial cells (BECs), alpha-7 integrin pericytes (AIPs) and double negative cells (DNCs).
- FRCs fibroblastic reticular cells
- FDCs folicular dendritic cells
- LECs lymphatic endothelial cells
- BECs blood endothelial cells
- AIPs alpha-7 integrin pericytes
- DNCs double negative cells
- composition can further include an activator of the
- the composition can further include an activator of the non-canonical NF- ⁇ signaling pathway.
- a composition of the present disclosure can include a plurality of cells, e.g., kidney cells (or a fragment of kidney tissue) or hepatocytes, and a therapeutically effective amount of an activator of the LTpR and/or NIK signaling pathway.
- the present disclosure provides a composition that can include (a) a plurality of cells, e.g., kidney cells (or a fragment of kidney tissue) or hepatocytes, (b) a plurality of bone marrow-derived cells and a plurality of stromal cells and (c) a therapeutically effective amount of an activator of the LTpR and/or NIK signaling pathway.
- a plurality of cells e.g., kidney cells (or a fragment of kidney tissue) or hepatocytes
- a plurality of bone marrow-derived cells and a plurality of stromal cells e.g., a plurality of bone marrow-derived cells and a plurality of stromal cells.
- the composition can optionally comprise a synthetic culture medium and/or a scaffold.
- the medium and/or scaffold can include, but not limited to, peptides, proteins, carbohydrates, matrigel, hyaluronic acid, collagen, fibrin, fibrinogen, fibronectin, polyorthoester, polyvinyl alcohol, polyamide, polycarbonate, agarose, alginate, poly(ethylene) glycol, polylactic acid, polyglycolic acid, polycaprolactone, polyvinyl pyrrolidone, a marine adhesive protein, cyanoacrylate, polymeric hydrogel, analogs or a combination thereof.
- the composition may optionally comprise an antibiotic.
- antibiotics include, but are not limited to, penicillin, e.g., penicillin and amoxicillin; cephalosporins, e.g., cephalexin; sulfonamides, e.g., co- trimoxazole and trimethoprim; macrolides, e.g., erythromycin, clarithromycin and azithromycin; fluoroquinolones, e.g., ciprofloxacin, levofloxacin and ofloxacin;
- tetracyclines e.g., tetracycline and doxycycline
- aminoglycosides e.g., aminoglycosides
- compositions that include ectopic tissue produced by the methods disclosed above.
- a composition of the present disclosure can include a human liver tissue produced in a non-human host, as disclosed above.
- the compositions can optionally comprise a synthetic culture medium and/or scaffold.
- the compositions can optionally comprise an antibiotic.
- kits that include one or more of the compositions disclosed herein.
- each composition can be provided in its own container in the kit.
- a kit of the present disclosure further provides instructions for using the kit, e.g., instructions for administering the composition present in the kit.
- a kit of this disclosure can further include one or more components such as instructions for use, devices and additional reagents, and components, such as tubes, containers and syringes for performing the methods disclosed above.
- hepatocytes could form ectopic nodules de novo after intraperitoneal injection (IP) in the Fah _/" mouse (a mouse deficient in the tyrosine catabolic enzyme fumarylacetoacetate hydrolase (Fah)), a model of induced liver failure, following removal of 2-(2-nitro-4-trifluoromethylbenzoyl)-l,3- cyclohexanedione ("NTBC”) from the drinking water (32).
- IP intraperitoneal injection
- Fah Fah _/
- NTBC 2-(2-nitro-4-trifluoromethylbenzoyl)-l,3- cyclohexanedione
- FIGURE 3 depicts Fah _/" mice 3 to 4 weeks after IP transplantation of hepatocytes; dilation of capillary space and sprouting of blood vessels in milky spots.
- lymph nodes could be targeted directly as a site for ectopic transplantation of multiple cell types to restore tissue and organ function. It was established that direct injection of hepatocytes into a single Fah _/" mouse lymph node (axillary, popliteal or mesenteric) generated enough functional ectopic liver mass to rescue the survival of these mutant mice affected with lethal metabolic disease (33).
- FIG. 2B a pig model of liver disease was generated and ectopic liver tissue growth in lymph nodes by performing a portacaval shunt followed by transplantation of hepatocytes in mesenteric lymph nodes. 6 pigs were transplanted with increased additional hepatic injury using partial hepatectomy. The result of this experiment was the demonstration of hepatocyte engraftment in lymph nodes and the generation of hepatic tissue in all transplanted animals (FIGURE 2B) with increased ectopic liver mass.
- Portacaval shunt is major surgical procedure for patients with serious liver diseases, but is now less commonly used. It reduces 75% of the blood flow to the liver by creating a new connection between blood vessels (portal vein to vena cava) to relieve debilitating portal hypertension. In addition, this dramatic reduction of the blood flow to the liver is known to induce hepatotrophic factors and hepatocyte proliferation (41).
- TIPS Transjugular Intrahepatic Portosystemic Shunting
- Hepatocytes also engraft into milky spots.
- hepatocyte engraftment site in the Fah _/" mouse after IP injection was carefully analyzed, it was found that, in addition to lymph nodes, hepatocytes also migrated to the omental milky spots, generating hepatic nodules (FIGURE 2C-D, FIGURES 3-5).
- FIGURE 3 the dilation of the capillary space and sprouting of blood vessels (e.g., lower right panel) in milky spots.
- Milky spots are small "milky” colored areas of lymphoid tissue (Fat-Associated Lymhoid Clusters or "FALCs") found mostly in the greater omentum (FIGURE 2C). These aggregates of hematopoietic cells (lymphoid cells and
- lymphoid organs 42, 43
- milky spots have also been identified as an early target in peritoneal carcinomatosis, particularly with metastatic ovarian cancer.
- IP transplantation was performed in Fah v" NOD mice further carrying mutations in recombinase activating gene-2 (RAG2) and common cytokine receptor gamma chain (gamma c) ("FRGN" mice); such mice are completely alymphoid (44).
- RAG2 recombinase activating gene-2
- FRGN common cytokine receptor gamma chain
- Aly/aly mice lack lymph nodes, Peyer's patches and have a disorganized spleen due to a point mutation in the NF- ⁇ inducing kinase (NIK) that disrupts non-canonical NF-KB signaling in cells (FIGURE 13). Without non-canonical NF- ⁇ signaling, lymph node organogenesis does not occur properly during development (no lymph nodes), although lymphatic vessels, and importantly milky spots, are present and functional in these mice (43).
- NIK NF- ⁇ inducing kinase
- FIGURE 17A shows the distribution of the lymphoid marker podoplanin and the endothelial marker CD31 in lymph nodes as compared to milky spots.
- FIGURE 17B transplanted hepatocytes form close
- stromal cells were found to express both NIK and the lymphotoxin beta receptor; hepatocytes, in turn, were lymphotoxin alpha (also known as Tumor Necrosis Factor Beta) and beta (also known as Tumor Necrosis Factor C) positive.
- lymphotoxin alpha also known as Tumor Necrosis Factor Beta
- beta also known as Tumor Necrosis Factor C
- lymphotoxin beta (“LTb”) and stromal cells express lymphotoxin beta receptor (“LTbR”) it was of interest to see whether hepatocytes would engraft and grow in milky spots of Fah _/" mice lacking LTbR.
- FIGURE 19 The results are shown in FIGURE 19, where growth of hepatocytes in the Fah/LTbR _/" mice was observed to be less than that in Fah v" , LTbR + mice.
- hepatocytes injected IP undergo organogenesis, complete with neo-vascularization to support the ectopic liver mass in Fah _/" mice, and the NIK pathway is a unique pathway necessary for this process to be completed.
- hepatocytes require the soil (secondary lymphoid organs) to engraft and generate liver tissue at an ectopic site.
- the data support a mechanism in which hepatocytes with stromal cells activate the lymphotoxin/NIK pathway to generate an auxiliary liver in milky spots.
- the data further indicate that regeneration of hepatic tissue, by
- NIK NF- ⁇ inducing kinase
- NIK is a member of the mitogen-activating protein 3 (MAP3) kinases, which following receptor ligation, accumulates to detectable levels. This allows NIK to phosphorylate and activate the inhibitor of ⁇ Kinase a (IKKa), thus initiating IKK a-mediated phosphorylation of pi 00 ⁇ see FIGURE 13).
- MAP3 mitogen-activating protein 3
- Fabregat I Moreno-Caceres J, Sanchez A, Dooley S, Dewidar B, Giannelli G, Ten Dijke P; IT -LIVER Consortium., TGF- ⁇ signalling and liver disease.
- FEBS J Fabregat I, Moreno-Caceres J, Sanchez A, Dooley S, Dewidar B, Giannelli G, Ten Dijke P; IT -LIVER Consortium., TGF- ⁇ signalling and liver disease.
- the mouse lymph node (LN), a secondary lymphoid organ (SLO), can support the maturation of mouse metanephroi into nephrons with glomerular and tubular functions, and the LN can also foster the maturation of transplanted human fetal kidney as well as kidney organoid cultures generated from mouse nephron progenitors (NPs) or human induced pluripotent stem cells (hiPSCs) (FIGURE 20).
- NPs mouse nephron progenitors
- hiPSCs human induced pluripotent stem cells
- the LTpR- Fc fusion protein antagonizes LTpR-mediated effects by engaging LTpR ligands (LTa and LTp) (see FIGURE 21). As shown in Figure 22A-B, LTpR-Fc treatment significantly reduced the size of the grafts and their vascularization.
- LTpR-Fc Besides engaging LTpR ligands, LTpR-Fc also engages the non-TNF family member LIGHT, which not only interacts with LTpR, but may also interact with HVEM and Dcr3 receptors (see FIGURE 21).
- LIGHT non-TNF family member
- HVEM and Dcr3 receptors see FIGURE 21.
- omentum As LTpR-/- mice do not have LNs, the greater omentum was used as an alternative SLO for transplantation.
- the omentum contains lymphoid aggregates, called milky spots, which promote immunity to peritoneal antigens (see FIGURE 1).
- a reticular network of fibroblast reticular cells (FRCs) supports leukocytes in milky spots.
- FRCs fibroblast reticular cells
- PDPLN+/LTpR+ and PDPLN-/LTpR+ cell subsets were identified in omental cell suspensions, indicating the existence of rare populations of LT-responsive FRCs and brain endothelial cells (BECs) in the omentum (FIGURE 22D).
- BECs brain endothelial cells
- Growth of embryonic kidney fragments was significantly affected in the LTpR-/- omentum; not only did the grafts grow smaller, but they also were less vascularized, and showed an aberrant morphology when compared to their control counterparts, pinpointing the importance of the LTpR signaling in host stromal cells for successful
- NIK vascularization/angiogenesis of the ectopic kidney graft
- FIG. 22G glomerular endothelial cells
- LTpR-Fc vascularization/angiogenesis of the transplanted tissue.
- NIK expression could not be detected in grafts grown in the LTpR-/- omenta.
- LTpR might use NIK to propagate the non-canonical NF-KB signaling and promote vascularization/angiogenesis of the transplanted tissue.
- stromal cells residing within secondary lymphoid organs appear to use LTpR-signaling to favor organogenesis, and that stromal endothelial cell-restricted NIK activation may promote graph angiogenesis.
- Fah _/ ⁇ C57bl/6 mice were tested in Fah _/ ⁇ C57bl/6 mice to determine if it will affect the survival of tyrosinemic mice after inducing a liver disease (off NTBC).
- Fah _/ ⁇ C57bl/6 mice with or without an induced inflammation were transplanted with wild type hepatocytes followed by inducing liver disease (off NTBC).
- Necropsy of the animals without induced inflammation revealed a low/limited hepatic engraftment and liver mass in the FALCs present in omental, splenic, portal, gonadal and mesenteric fat (FIGURE 26).
- the animal with induced inflammation had large masses of hepatic tissue in these locations.
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GB2600256A (en) * | 2019-04-11 | 2022-04-27 | Univ Pittsburgh Commonwealth Sys Higher Education | Minimally invasive cell transplant procedure to induce the development of in vivoorganogenesis |
GB2600256B (en) * | 2019-04-11 | 2024-02-21 | Univ Pittsburgh Commonwealth Sys Higher Education | Minimally invasive cell transplant procedure to induce the development of in vivo organogenesis |
CN116925997A (en) * | 2023-07-27 | 2023-10-24 | 湖北医药学院 | Application of quinolone drugs as EGFR (epidermal growth factor receptor) activator to promotion of cell proliferation |
CN116925997B (en) * | 2023-07-27 | 2024-04-02 | 湖北医药学院 | Application of levofloxacin in preparing medicine for promoting cell proliferation |
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EP3582794A4 (en) | 2020-12-09 |
CN110869032A (en) | 2020-03-06 |
EP3582794A1 (en) | 2019-12-25 |
JP2023061960A (en) | 2023-05-02 |
IL310219A (en) | 2024-03-01 |
IL268389B2 (en) | 2024-06-01 |
MX2019009367A (en) | 2019-10-24 |
AU2018221254A1 (en) | 2019-08-15 |
BR112019016965A2 (en) | 2020-04-14 |
KR20190116439A (en) | 2019-10-14 |
IL268389B1 (en) | 2024-02-01 |
CA3052295A1 (en) | 2018-08-23 |
IL268389A (en) | 2019-09-26 |
US20190374583A1 (en) | 2019-12-12 |
JP2020508298A (en) | 2020-03-19 |
US20240091271A1 (en) | 2024-03-21 |
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