WO2000073791A1 - Remedies for kidney diseases and method for screening the same - Google Patents
Remedies for kidney diseases and method for screening the same Download PDFInfo
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- WO2000073791A1 WO2000073791A1 PCT/JP2000/001695 JP0001695W WO0073791A1 WO 2000073791 A1 WO2000073791 A1 WO 2000073791A1 JP 0001695 W JP0001695 W JP 0001695W WO 0073791 A1 WO0073791 A1 WO 0073791A1
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- G—PHYSICS
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- G01N2500/00—Screening for compounds of potential therapeutic value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2500/00—Screening for compounds of potential therapeutic value
- G01N2500/10—Screening for compounds of potential therapeutic value involving cells
Definitions
- the present invention relates to a method for screening and identifying a therapeutic agent for renal disease.
- it relates to a screening method and an identification method focusing on the expression of a fatty acid binding protein, and to a cell line established from kidney (proximal tubule) cells.
- Kidney diseases such as nephritis have complex and diverse pathologies, but when they become chronic, glomerulosclerosis and interstitial iteration occur, and may lead to a serious course of renal failure . Therefore, accurate treatment at an early stage is desired, but at present there are very few effective therapeutic agents.
- Steroids one of the few therapeutic drugs, have clear effects, but have the problem of very strong side effects, and there has been a strong demand for new and superior therapeutic drugs.
- FABP fatty acid binding protein
- FABP includes liver type (L-FABP), intestinal type (I-FABP), myocardial type (H-FABP), brain type (B-FABP), skin type (CF AB P / EF AB P), fat At least seven molecular species are known, including cell type (aP2) and peripheral nerve cell type (myelin P2). These all have fatty acid binding ability and are considered to be families evolved from common ancestral genes.
- L-FABP liver type
- I-FABP intestinal type
- H-FABP myocardial type
- B-FABP brain type
- CF AB P / EF AB P skin type
- CF AB P / EF AB P fat
- FABP includes liver type (L-FABP), intestinal type (I-FABP), myocardial type (H-FABP), brain type (B-FABP), skin type (CF AB P / EF AB P), fat At least seven molecular species are known, including cell type (aP2) and peripheral nerve cell type (myelin P2).
- H-FABP myocardial type
- H—FAB P is mainly distributed in the distal tubule.
- K—FAB P is synthesized by the liver after ⁇ 2 ⁇ -glopurin synthesized in the liver is excreted from the blood into the urine via the kidneys and then partially reabsorbed into tubular cells and processed inside the cells. Is considered to be converted to renal-type FAB ⁇ following the treatment of cysteine (Kimura et al., FEBS Letters, Vol. 246, pp. 101-104, 1989).
- the present invention is a method for screening or identifying a therapeutic or prophylactic agent for renal disease, characterized by assaying the effect of a test substance on the expression of fatty acid binding protein (FABP) in animal cells. Further, it is a therapeutic or prophylactic agent for renal disease selected or identified by such a method. Also, kidney cells Or a drug having an action to enhance the expression of FAB P in a tissue or tissue (such as a compound having an agonistic effect of peroxisome proliferator-activated receptor (PPAR)) as an active ingredient, It is a prophylactic drug. Further, the present invention is a novel mouse proximal tubular epithelial cell line useful for the screening method or the identification method.
- FABP fatty acid binding protein
- kidney tissues and cells are exposed to various stresses such as severe proteinuria and ischemia.
- the therapeutic or prophylactic agent for renal disease selected or identified by the method of the present invention that is, a drug that enhances the expression of FABP, protects kidney cells or tissues. Its mode of action is based on the fact that FABP in kidney tissues and cells (particularly tubular cells) protects against stress such as severe proteinuria and ischemia.
- severe proteinuria has recently been regarded as a risk factor in itself, not just an indicator of kidney damage (Kees-Folts et al., Kidney International, Vol. 45, pp. 1697-1709, 1994; Eddy Et al., Journal of the American Society of Nephrology, Vol. 5, pp.
- albumin which is the main component of proteinuria
- Fatty acid bound to urine protein is likely to be reabsorbed from the brush border membrane of proximal tubular epithelial cells, bind to intracellular FABP, and be transported to mitochondria and peroxisomes].
- fatty acids do not undergo normal j3 oxidation, and as a result, the production of lipid factors (nephrotoxic factors) that activate macrophages is induced, and so on. It will progress the conversion of stroma to ml by immunological mechanisms.
- by increasing the expression of FABP in proximal tubular epithelial cells normalization of fatty acid metabolism and suppression of the production of renal impaired lipidic factors improve the disease state. It is thought to get.
- FIG. 1 is an electron micrograph showing the morphology of mouse proximal tubular epithelial cell line No. 13 (37-13).
- Figure 2 shows the hormonal response of mouse proximal tubular epithelial cell lines (Nos. 10, 13, 14, 15, 16, and 19) (induction of intracellular cAMP production when stimulated with PTH and AVP). It is a figure showing the result of measurement.
- FIG. 3 shows the results of measuring the BSA uptake ability of mouse proximal tubular epithelial cell lines (Nos. 13 and 16).
- FIG. 4 is a diagram showing the results of measuring the L_FABP expression enhancing effect of a test substance by a reporter assay using a mouse proximal tubular epithelial cell line.
- FIG. 5 shows the effect of L-FABP expression suppression on cell injury in a hypoxia-reoxygenation model (in vitro renal ischemia-reperfusion model).
- L-FAPP antisense was used for transient transfection of L-FAPP antisense RNA expression vector from porcine proximal tubule-derived LLC-PK1 cells. The same cells that were transiently transfused are represented.
- Figure 6 shows the effect of forced expression of L-FABP on cell injury in a hypoxia-reoxygenation model (in vitro renal ischemia-reperfusion model).
- FIG. 5 shows the effect of L-FABP expression suppression on cell injury in a hypoxia-reoxygenation model (in vitro renal ischemia-reperfusion model).
- FIG. 7 shows the results of examining the effects of a drug (MCC-555) on proteinuria and NAG excretion in a kidney disease model (adreamycin-induced glomerulosclerosis model) mouse.
- FIG. 8 shows the effect of a drug (MCC-555) on blood biochemical parameters (blood cholesterol and albumin levels) in a kidney disease model (adreamycin-induced glomerulosclerosis model) mouse.
- FIG. 9 shows the effect of the drug (MCC-555) on proteinuria and NAG excretion in a renal disease model (adreamycin-induced glomerulosclerosis model) using transgenic mice transfected with the human L-FAB P gene.
- FIG. 4 is a diagram showing the result of examining the above.
- the diseases targeted by the present invention include diabetic nephropathy, glomerulonephritis, nephrotic syndrome, focal glomerulosclerosis, immune complex nephropathy (IgA nephropathy) , Membranous nephropathy), renal diseases such as lupus nephritis, drug-induced nephropathy and renal failure.
- the present invention is applied not only to human diseases, but also to mammals such as monkeys, dogs, cats, pigs, pigs, sheep, sheep, goats, rabbits, rats, and mice. In mammals such as humans (other than rodents), kidney cells or tissues express LFABP and H—FABP.
- L-FABP is distributed in the proximal tubule
- H-FABP is mainly distributed in the distal tubule.
- FABP in kidney cells or tissues, especially on FABP in proximal tubular cells (ie, L-FABP in humans, etc.). it is conceivable that.
- the screening method and the identification method of the therapeutic agent for renal disease according to the present invention can be carried out in the following modes. That is, by culturing animal cells (such as mammalian cells or tissues) in the presence of the test substance, and comparing the expression level of FABP in the cells with that in the absence of the test substance, the test substance The effect of enhancing the expression of FABP may be determined. Alternatively, the test substance may be administered to an animal individual, and the FABP expression-enhancing effect of the test substance may be assayed by comparing the expression of FABP in kidney tissues and cells with that of the non-administration.
- animal cells such as mammalian cells or tissues
- the test substance is determined to have a potentiating effect according to the degree, and the effect as a therapeutic drug for renal disease can be expected .
- a test substance having a strong FABP expression enhancing action as a candidate, a therapeutic agent for renal disease can be suitably screened.
- the mechanism of action as a therapeutic agent for renal disease is clarified, and excellent characterization as a therapeutic agent It can be performed.
- Examples of a method for detecting the expression of FABP include a method for measuring the expression of a gene by a reporter assay using a reporter protein as an index. Gene expression can also be detected at the mRNA level. Alternatively, the expression of FABP in the cell extract can be directly detected at the protein level.
- a DNA construct consisting of a transcriptional regulatory region of the FABP gene and a reporter gene linked downstream thereof is prepared, and the DNA construct is prepared in an appropriate animal cell. To be introduced. The cells are After culturing in the presence and absence of personally, the expression level may be quantified and measured by measuring the activity of the reporter protein in the cell extract.
- Genbank / EMBL accession number M10050 Rat chromosomal gene (Sweetser et al., Journal of Biological Chemistry, Vol. 261, Vol. 5553-5561, 1986) Sequence information such as Genbank / EMBL accession number M13501) is known.
- primers and probes are designed based on the above sequence information, and the PCR method, colony hybridization method, plaque hybridization method, etc. are used. It can be obtained from an appropriate DNA library in appropriate combination.
- the reporter structure and the reporter plasmid containing it are prepared by a conventional gene recombination technique using the transcription regulatory region located in the 5 'upstream region of the chromosomal gene of FABP and an appropriate reporter gene. can do.
- the reporter gene is not particularly limited, but it is preferable to use a gene of an enzyme which is stable and whose activity can be easily measured quantitatively.
- reporter genes include the galactosidase gene (1 ac Z), the chloramphenic acid acetyltransferase gene (CAT) derived from a bacterial transposon, and the luciferase gene (Luc) derived from firefly. .
- RNA is extracted from cells or tissues, and PCR (Polymerase chain reaction method) (rpCR Protocols J Innis MA, Gel fad DH, Sninsky JJ and White TJ eds., Academic Press, Sandiego, 1990), RNase protection assay method (Nucleic Acid Research Vol. 12, pp. 7035-7056, 1984), or Northern blot analysis
- PCR Polymerase chain reaction method
- RNase protection assay method Nucleic Acid Research Vol. 12, pp. 7035-7056, 1984
- Northern blot analysis The mRNA transcribed from the FABP gene may be detected and quantified using a method or the like.
- an anti-FABP antibody n etc. can be used immunochemical methods using (EL I SA method, immunohistochemical staining method).
- Antibodies can be prepared by a conventional method using purified FABP as an immunizing antigen.
- EL I SA method immunohistochemical staining method.
- Antibodies can be prepared by a conventional method using purified FABP as an immunizing antigen.
- FABP adenosine-derived protein
- cDNA may be isolated based on the known gene sequence information and prepared and used by gene recombination technology.
- the cell be an animal cell (such as a mammalian cell).
- an animal cell such as a mammalian cell.
- cells derived from animal kidney are preferred, tubular cells are more preferred, and proximal tubular epithelial cells are particularly preferred.
- primary cultured cells or immortalized cells may be used.
- Use of immortalized cells (cell lines) is advantageous in that culturing and handling are easy.
- kidney-derived cells As cells derived from human kidney, cells falling in urine (particularly, proximal tubular epithelial cells) can be separated from human urine samples and used.
- the use of human kidney-derived cells is advantageous in that the effects in humans can be more reliably predicted.
- Known cell lines derived from tubules include, for example, MDCK (ATCC CRL 6253), a cell line derived from canine tubule (distal tubule), and porcine tubule (proximal tubule). Derived cell line, such as LLC-PK1 (ATCC CRL1392).
- the inventors of the present invention such as the mouse cell line mPro X 37-13, used a mouse near the mouse in Example 2 to be described later.
- Immortalized cell lines established from renal tubular cells. These cell lines have the following properties (1), (2) and (3). (1) It has an epithelial cell morphology.
- LLC-PK1 is considered to be derived from the proximal tubule and is an epithelial cell, but has a hormone-responsive characteristic of proximal tubule cells in vivo (3 ) (See Example 2 below).
- the cell lines established by the present inventors are cell lines that clearly maintain the characteristics of proximal tubular epithelial cells, including hormone responsiveness. The system becomes closer to the physiological environment in the living body. The use of such cells is advantageous for effective screening and identification of renal disease drugs.
- the therapeutic and preventive effects can be further confirmed in a known disease state model (in vivo or in vitro) of renal disease.
- Examples of such an in vitro disease state model include a model for producing renal impaired lipids (inflammatory lipids) using tubular cells (Kees-Folts et al., Kidney International, Vol. 45, pp. 1697-1709, 1994). And the like.
- In vivo disease models include an accelerated anti-GBM nephritis model (Nagai et al., Jpn. J. Pharmacol., Vol. 32, pp. 1171-1124, 1982) and an S S-induced diabetic nephropathy model. (Sharma et al., Diabetes., Vol. 45, pp.
- Drugs having FABP expression enhancing activity include, for example, peroxisome proiiferator-activated receptor (PPAR) agonists, carnitine palmitoyltransferase
- PPAR peroxisome proiiferator-activated receptor
- CPT cystethione-transferase
- a peroxisome proliferator response element is found upstream of the FABP gene. This confirms that the PPARagonist has an activity of enhancing FABP expression.
- P PAR agonists examples include known P PAR agonists (Lehmann et al., Journal of Biological Chemistry, Vol. 270, Vol. 12953-12956, 1995; Willson et al., Journal of Medicinal Chemistry, Vol. 39, Vol. 665-668. P. 1996) and the methods described in the literature (WO 99/1 0532; WO 96/33724; WO 9
- MCC-555 chemical name: 5- [6- (2-fluorobenzyloxy) naphthalen-2-ylmethylJtniazoliame-2, 4-dione; EP 604 983) is an agonist of PPAR (PP ARy). It can be used particularly preferably.
- CPT inhibitors examples include known CPT inhibitors (Current
- 4-THA chemical name: 2-hydroxy-3-propyl- 4-[6- (tetrazol-5-y ⁇ ) hexyloxy] acetophenone; Biochem J. Vol. 252, pp. 409-414, 1988
- 4-THA chemical name: 2-hydroxy-3-propyl- 4-[6- (tetrazol-5-y ⁇ ) hexyloxy] acetophenone; Biochem J. Vol. 252, pp. 409-414, 1988
- PPARagonist II CPT inhibitors are known as therapeutic agents for diabetes. It has also been reported that diabetic-induced kidney disease symptoms are improved in a diabetic condition model (Buckingham et al., Diabetes, Vol. 47, pp. 1326-1334, 1998). This is based on the improvement of the underlying disease, diabetes. There is no information or suggestion to apply PPAR agonists or CPT inhibitors to renal diseases not caused by diabetes. On the other hand, the therapeutic or prophylactic agent of the present invention is suitably applied to renal diseases other than renal diseases caused by diabetes (eg, diabetic nephropathy).
- a test substance when a test substance, a drug having a FABP expression enhancing action, a PPAR agonist, an inhibitor of CPT, or the like is administered to an animal individual or a human, any of oral, intravenous, intramuscular, subcutaneous, etc.
- a form may be used. It can be formulated as necessary together with an inert carrier according to the dosage form and used.
- the dose varies depending on the method of administration, the age and weight of the individual, the degree of the disease, etc., but is usually 1-3 mg / kg per day for oral administration and 0 mg / kg for parenteral administration. Set in the range of 01 to 5 OmgZkg.
- the medicament (therapeutic agent or prophylactic agent) of the present invention exerts an in vivo drug effect based on the FABP expression enhancing action (or PPAR agonist action or CPT inhibitory action).
- the medicament of the present invention does not include a drug which does not have an action of enhancing FABP expression (or a PPAR agonist action or an inhibitory action of CPT) having sufficient strength to exert a drug effect in vivo. Also, it does not include drugs that exert a drug effect in vivo based on other major actions other than the FABP expression enhancing action (or PPAR agonist action or CPT inhibitory action).
- the pharmaceuticals of the present invention do not include those which cannot be used for the treatment or prevention of diseases due to toxicity or unfavorable characteristics in pharmacokinetics.
- the DNA fragment (approximately 420 base pairs) obtained by PCR contained the entire translation region of human L-FAB Pc DNA. This fragment was ligated to the appropriate plasmid.
- Fragment containing human FABP cDNA obtained in (1) above (about 420 base pairs, BamH
- the human L-FAPP chromosomal gene was cloned from the human chromosomal DNA library (Clontech, Cat # HL1006d L0T # 19412) by the plaque hybridization method. One Jung. The resulting clone contained an approximately 20 kb insert. Partial nucleotide sequencing revealed that this fragment contained the entire translation region of human L-FABP.
- a fragment (about 5360 bp, Sail-K ⁇ I fragment) containing the 5 ′ upstream region was cut out of this inserted fragment, and incorporated into Vector Plasmid for use in the following experiments.
- the nucleotide sequence of the fragment containing the 5 'upstream region (SalI-KpnI fragment) is shown in SEQ ID NO: 1 in the sequence listing below.
- the L-FAPP gene fragment (about 5360 base pairs, Sa1I-KpnI fragment) obtained in the previous section (2) was used as type III, and the NspV recognition site (5 ' A region from the 4670th base of SEQ ID NO: 1 to about 100 bases downstream (immediately before the start codon) was amplified to obtain a fragment (about 100 bp).
- the resulting plasmid was digested with NspV and KpnI. Digestion deleted the portion downstream from the NspV recognition site.
- the fragment obtained by the above PCR was ligated with this to obtain plasmid pUC18-925.
- This plasmid is then digested with Sa1I and KpnI and the resulting fragment (About 4760 base pairs) was inserted into a vector plasmid pGV-B (manufactured by Toyo Ink) to obtain a plasmid for reporter assembly.
- the inserted fragment contains the nucleotide sequence corresponding to the 1st to 4760th positions (immediately before the start codon) of SEQ ID NO: 1, and a Kpnl recognition sequence (6 base pairs) is added to its 3 'end.
- the resulting L-FAB ⁇ reporter plasmid is composed of a reporter in which the luciferase gene (excluding the promoter region) is linked downstream of the 5 'upstream region containing the transcriptional regulatory region of the human L-FAB ⁇ gene. Having.
- Nephrons were isolated from mouse kidneys by microdissection as follows. The mouse was anesthetized with pentobarbital and then laparotomy was performed, and 20 ml of a cold Hanks' buffered solution (HBS) containing 0.1% BSA was perfused from the abdominal aorta. Then, 10 ml of cold HBS containing 0.1% BSA and 0.1% collagenase type 1 were perfused. 5% of these perfusate
- HBS Hanks' buffered solution
- kidney was excised and sliced with a thickness of 0.5 to: 1.0 mm using a surgical blade (Surgical Brade). This was immersed in 10 ml of 0.1% collagenase solution (in HBS), treated with the enzyme at 37 ° C for 10 minutes, and then washed twice with HBS. A single segment (nephron) was isolated while observing this sliced piece with a stereoscopic microscope in an ice-cooled state.
- a single segment was prepared using K1 medium (50:50 DMEM / Ham's F-12, 15 mM Hepes, 13.4 mM sodium bicarbonate 5 ⁇ g / m1 insulin, 5 ⁇ g / After washing twice with m 1 transferrin ⁇ 5 ng / m 1 selenous acid, 0.05 // M hydrocortisone, 10 ng / m 1 epidermal growth factor), the cells were seeded on a 96-well plate and cultured in the same medium. The next day, the addition of feeder cells (Feeder layer) (2.
- Tubular epithelial cells were cultured in the same manner as in (2) above.
- the plasmid containing the SV40 Large T antigen gene and the neomycin resistance gene (a commercially available plasmid containing the neomycin resistance gene p GEM3 S Ra neo inserted the SV40 Large T antigen gene into the plasmid) C) transfection.
- Transfection was performed by culturing cells at 37 ° C. for 1 to 3 hours in a medium to which a mixture of plasmid and transphenatam (Air Brown; cationic ribosome) was added.
- the cells were cultured for 2 to 3 days, treated with trypsin-EDTA to detach the cells, and subcultured into a 48-well plate. At that time, a new supporting cell was added to the feeder (about 1 X 1 C ⁇ cellsZwell). One or two days after the passage, the plasmid was transfused again. Thereafter, the above operation was repeated while expanding the culture scale to obtain immortalized cells.
- the obtained immortalized cells were cultured in a K1 medium containing 10% fetal calf serum in a culture vessel coated with 0.1% gelatin without using feeder cells. went.
- Example 1 The immortalized cells obtained in (3) above were cultured overnight. Then, the Example 1 was made adjusted by a human L one FABP reporter plus Mi de (18 mu g), a plasmid containing a Haiguromaishi down resistance gene (p PUR, Clontech, Inc., Cat # 6 1 ⁇ 6-1) (1.8 / / g) and transfection was performed. Transfection was performed using transfection as in the previous section (3).
- hygromycin 100 / zg / m1
- the cells were cultured in a medium (Kl medium containing 10% fetal bovine serum). After passage once after 6 days of culture, the cells were further cultured for 10 days, and the resulting hygromycin-resistant colonies were collected under a microscope, inoculated into a 96-well plate, and cultured. Thus, several transformed cell lines (No. 10 to No. 19) into which the plasmid was introduced were obtained.
- FIG. 1 shows an electron micrograph of the cell line No. 13. It is known that renal tubular epithelial cells show specific responsiveness to various hormones in each segment and induce intracellular cAMP production. For example, proximal tubule cells respond only to parathyroid hormone (PTH) and no response to vasopressin (AVP). On the other hand, collecting ducts and Hen 1e snares respond to AVP.
- PTH parathyroid hormone
- AVP vasopressin
- LLC-PK1 ATCC CRL 1392
- a known proximal tubular epithelial cell line was examined in the same manner as described above.
- the ratio of cAMP production to hormonal stimulation was 1: 0.7: 7.4 in the control: PTH stimulation: AVP stimulation, and was found to respond to AVP without responding to PTH. . That is, unlike the cell line No. 13, LLC-PK1 did not have the characteristics of proximal tubule cells in terms of hormone responsiveness.
- albumin uptake ability of cell lines No. 13 and No. 16 was examined in accordance with the method described in Reference Example 1 (5) below.
- the proximal tubule is a segment responsible for the reabsorption of proteins contained in the filtrate filtered by the glomerulus, and the proximal tubule cells are known to have the ability to take up albumin and other substances that are present in large amounts in plasma. Have been.
- both cell lines showed albumin uptake ability.
- cell line No. 13 showed about 5 times higher albumin uptake capacity than the control, and this indicates that cell line No. 13 has proximal tubular cells also in terms of albumin uptake capacity. It was found that the characteristics as well were maintained.
- cell line No. 13 is a mouse proximal tubular epithelial cell line and a cell line into which L-FABP reporter plasmid has been introduced.
- Southern blot analysis was performed as follows.
- a 4.3 Kb fragment was obtained by cutting the chromosomal DNA with the restriction enzyme Ap a-Kpn I. Should occur.
- Chromosomal DNA was prepared from cells of cell line No. 13, treated with restriction enzymes Apa and Kp ⁇ I, and then subjected to agarose gel electrophoresis. After transferring the DNA from the gel after the electrophoresis to a nylon membrane (Hyband N + membrane, Amershaml earth), the membrane was washed with 2 XSSC and dried. After pre-hybridization treatment of the membrane, the membrane is hybridized in a hybridization buffer containing probe at 65 ° C.
- cell line No. 13 has a DNA structure derived from the L-FABP reporter plasmid (a structure comprising the human L-FABP gene transcription regulatory region and the luciferase gene) inserted into its chromosome. It was considered.
- mProx 37- 13 This cell line No. 13 (hereinafter referred to as mProx 37- 13) was deposited as described above under the cell line name "mouse cell line mPro X 37- 13" (Receiving Deposit number: FE RM BP—7038, Date of change to international deposit: February 21, 2000).
- the proximal tubular epithelial cell line mPro X37-13 (also referred to as cell line No13) containing the L-FABP reporter-DNA construct obtained in Example 2 was used.
- the L-FABP expression enhancing effect of the test substance was measured by the reporter assay as described below.
- the cell line mProx 37-13 was dispensed into a 96-well flat bottom plate at 5 ⁇ 10 4 cells / 100 ⁇ l well and cultured.
- the medium was 100% fetal serum serum, penicillin (100 units / m1) and streptomycin (100 / ZZm Dulbecco's MEM (high glucose; DMEM) (Gibco) supplemented with 1) was used.
- the cells were washed once with a serum-free medium, and then a serum-free medium containing a test substance was added. As a control, no test substance was added. After further culturing, the luciferase activity was measured 2 to 10 hours later.
- Luciferase activity was measured as follows. After washing the cells with phosphate buffered saline (PBS), add 20 ⁇ l of cell lysate (cultured cell lysate LC) 3-51, manufactured by Toyo Ink Co., Ltd., and leave at room temperature for 20 minutes. Stored overnight at 80 ° C. ⁇ After returning the plate stored at 80 ° C. to room temperature, 1 ⁇ l of a luminescent substrate solution (Pitka Gene Luminescence Kit, manufactured by Toyo Ink) was added to start the reaction. The luminescence was measured using a luminometer (MicroLumat LP98P, BERTHOLD
- peroxisome proliferator-activated receptor As a test substance, peroxisome proliferator-activated receptor
- MCC-555 (chemical name: 5- [6- (2-fluorobenzyloxy) naphthalen_2-yl-methyl] thiazolidine-2, 4-dione; EP 604 983) and etomoxinole (chemical name: ethyl 2- [6- ( 4-chlorophenoxy) hexyl] -oxiranecarboxylate; EP 465 90 and Current Pharmaceutical Design, Vol. 4, pp. 1-15, 1998) were synthesized according to the method described in the literature.
- Example 4 Assay for enhancing L-FABP expression in proximal tubular epithelial cells
- the pig tubule cell line LLC-PK1 or Example 2 described above was used.
- the mice were transfected into immortalized tubular epithelial cells obtained in the same manner as in (3) to obtain stable transformed cells.
- the chromosomal gene for human L-FABP was integrated on the chromosome without deletion.
- the L-FABP expression enhancing effect of the test drug was examined at the mRNA and protein levels as follows. After culturing the cells to confluence, replace the medium with serum-free DMEM medium to a final concentration of 1 zM. The test drug was added to the medium so as to be cultured at 37 ° C. In the control, no test drug was added.
- the measurement at the mRNA level was performed as follows. After the culture, the cells were collected and total RNA was prepared. RT-PCR using the obtained total RNA as type II
- ABP mRNA was detected.
- mRNA of GAPDH (Glyceraldehyde 3-phosphate dehydrogenase) was detected using the same RT-PCR as a control. After the obtained PCR product was subjected to agarose gel electrophoresis, each band was detected by staining with ethidium bromide, and the expression level was determined by densitometry or visual observation. As a result, when MCC-555 was added as a test drug, the induction of L-FAB P mRNA was observed from 15 minutes to 24 hours after the culture.
- the measurement at the protein level was performed as follows. The cells after culturing were collected and disrupted by ultrasonic waves, and then a cell extract was prepared. The amount of L-FABP in the extract was measured by the western blotting method using an anti-human L-FABP antibody or the ELISA 'method. As a result, the addition of MCC-555 as a test drug was found to enhance the expression of L-FABP protein. Similarly, when etomoxil was added as a test drug, an effect of enhancing the expression of L-FABP protein was also observed.
- Example 5 Assay of L-FABP expression enhancing action in human urinary falling cells
- Tubular epithelial cells (hereinafter referred to as urinary falling cells) falling from the kidney tissue into the urine were separated from the human urine sample as described below and used for culture.
- urine samples were collected by boys with nephritis (0 to 3 years old) or by the clean-catch method. Then, this urine sample was centrifuged at room temperature (1000 rpm, 10 minutes), the supernatant was discarded, and the pellet was reduced to 10%.
- V Z V Dulbecco's medium containing fetal serum
- the plate was washed twice with modified Eagle's medium) and once with the culture medium.
- Culture media include Dulbecco's Ignore medium and Ham's F-12 medium (Ham, sF-1). 2 medium) in 1: 1 mixture, fetal calf serum (10% vZv), insulin (5 ⁇ g / m 1), transferrin (5 ⁇ g / m 1), sodium selenite (sodium selenite) (5 ng / m 1), dexamethasone (1 0- 8 M), was added nicotinamidine de (5 mM), penicillin (1 00 1 UZm 1) and streptomycin (l OO / zg / ml) Was used.
- the pellet was suspended in a culture medium, diluted appropriately, and then cultured in a 3.5 cm-diameter dish (Falcon) coated with type 4 collagen. Cultivation was performed at 5% CO 2 at 37 ° C.
- the medium is replaced with Dulbecco's Eagle's medium (containing no serum) containing the test drug to a final concentration of ⁇ .
- the cells were cultured at 37 ° C.
- MCC-555 PPARagonist
- 4-THA 4-hydroxy-3-propyl-4- [6- (tetrazol-5-yl) hexyloxy] -acetophenone
- CPT inhibitor 4-THA (2-hydroxy-3-propyl-4- [6- (tetrazol-5-yl) hexyloxy] -acetophenone)
- RNA DNA sequence complementary metal-oxide-semiconductor
- RT-PCR Reverse transcriptase-Polymerase chain reaction
- mRNA of rBAT related to b0 , + system amino acid transporter; Purroy et al., Genomics ⁇ Vol. 37, Vol. 249-252, 1996) was used as a control.
- RT Detected by PCR.
- porcine L-FAB Pc DNA was cloned by RT-PCR, and pRCZ
- p L FAB P — p RCZCMV was transfected with lipofectamine (manufactured by GIBCO).
- lipofectamine manufactured by GIBCO
- pRC / CMV lipofectamine
- the degree of cytotoxicity was measured using LDH (lactic dehydrogenase) leaked into the medium as an index. That is, after the exposure to hypoxia, the medium was collected, and the LDH activity in the medium was measured using a measurement kit “LDH-Cytotoxicity Test II” (manufactured by Wako Pure Chemical Industries, Ltd.).
- L-FABP antisense RNA expression ie, L-FABP expression
- L-FABP expression increased cytotoxicity during hypoxia / reoxygenation, resulting in renal vascular damage to proximal tubular cells.
- L-FABP was thought to play a role in protecting cells.
- Example 6 the effect of forced expression of L-FABP on cell injury was examined using a hypoxia / reoxygenation model using proximal tubular cells (in vitro renal ischemia / reperfusion model).
- Example 1 A mouse containing the human L-FABP chromosomal gene (full length) isolated in Example 1 (2) was linearized and then obtained in the same manner as in Example 2 (3). Transfection into proximal tubular cells (clone 24) yielded stable transformed cells (clone 24-19). In this cell, the chromosomal gene of human L-FABP was integrated on the chromosome without deletion.
- Clone 24-19 obtained above and clone 24 as a control cell were each exposed to hypoxia for 24 hours in an anaerobic chamber (COY). Further, the cells were returned to the normal atmosphere and reoxygenated for 24 hours, and then the degree of cytotoxicity was measured. The degree of cytotoxicity was measured using LDH (lactic dehydrogenas) leaked into the medium as an index.
- COY an anaerobic chamber
- Adriamycin-induced glomerulosclerosis mice were used as a kidney disease model.
- the effect of the PPAR agonist MCC-555 on the drug was confirmed as follows.
- Adriamycin (AD) -induced glomerulosclerosis mice exhibit nephrotic symptoms, develop focal glomerulosclerosis at 3 weeks, and irreversibly lead to chronic renal failure (Chen et al. Nron hron, Vol. 78, pp. 440-452, 1998). Further, as shown in Examples 3, 4 and 5, MCC-555 is a compound that has been confirmed to have an L-FABP gene expression enhancing effect.
- mice used 7-week-old female BALBZc (purchased from Nippon Charls River).
- adriamycin manufactured by Sigma
- the normal group received only the same volume of physiological saline intravenously.
- mice were orally administered either MCC-555 or vehicle alone for 14 days (from day 0 to day 13) from the start of the experiment.
- the first dose was administered one hour before the administration of adriamycin, and the volume of each solution was 10 m1 kg.
- FIG. 7 shows the result of the blood biochemical test on the 14th day.
- FIG. 8 shows the result of the blood biochemical test on the 14th day.
- the control group symptoms of hypercholesterolemia and hypoalbuminemia, which are the main symptoms of nephrosis, were observed. In contrast, these symptoms were improved in the drug-administered group.
- MCC-555 suppresses NAG excretion, which is an indicator of proximal tubule injury, in renal disease model mice (adreamycin-induced glomerulosclerosis model), as well as the main symptoms of nephrosis. Proteinuria and blood biochemical parameters. Furthermore, examination of the renal histology confirmed that MCC-555 also suppressed histological changes in the kidney of the model mouse.
- hFABP-Tg mice Transgenic mice into which human L-FABP gene was introduced were prepared.
- a renal disease model according to Example 8 was prepared as described below, and the action of MCC-555 was confirmed.
- h F ABP-T g mice were prepared using BCF 1 male mice 13 weeks or older for infertile and natural mating, and ICR female mice 10 weeks or older for embryo transfer and foster care.
- BDF 1 male mice 13 weeks or older were used for mating, and BCF 1 female mice 8 weeks or older were used for egg collection.
- the transgenic mice (B6C3F1 strain) obtained in this way were returned to BALB / c mice and crossed.
- a renal disease model (adriamycin-induced glomerulosclerosis model) was prepared and the action of the drug (MCC-555) was confirmed.
- Preparation of the disease model and confirmation of the action of the drug were conducted in accordance with Example 8 described above.
- the dose of adriamycin (AD) administered on the day of the experiment was 15 mg / kg (15 ml 1 Zkg dissolved in physiological saline at a concentration of 1 mg Zm 1). .
- Reference Example 1 Isolation of primary tubular epithelial cells by density gradient centrifugation and primary culture
- kidney cortical cells were isolated from mouse kidney as follows.
- HBS Hank's buffered solution
- This cell suspension was overlaid on 30 ⁇ 1 ⁇ 2—50% protein (Perco 11) overlay solution, and then centrifuged (3500 rpm, 4 ° C., 30 minutes). After centrifugation, the cells in each layer (four layers of fractions 1 to 4 from the top) separated in the Percoll density gradient were carefully collected.
- Alkaline phosphatase is known to be located in the proximal tubule in the kidney. Therefore, a part of the cells in each layer collected in the above (1) was collected and subjected to alkaline phosphatase staining as follows. That is, the cell suspension was centrifuged, fixed on a preparation, stained using an alkaline phosphatase substrate kit (Funacocine :), and then encapsulated with glycerol. As a result, in fraction 1 of the uppermost layer, The alkaline phosphatase positive rate was the highest, and therefore, the content of proximal tubular cells was considered to be the highest.
- the cells of fraction 1 in (1) above were treated with collagenase as follows, and then subjected to primary culture. That is, the collected cells were washed once with HBS, and 1 ml of a collagenase solution (collagenase type 4, 2 mg ml, in HBS) was added thereto, followed by enzyme treatment at 37 ° C for 5 minutes. After further washing twice with HBS, the cells were cultured. It is generally known that the primary culture of epithelial cells is contaminated with fibroblasts, and it is necessary to suppress the proliferation of blast cells and selectively grow only epithelial cells.
- a collagenase solution collagenase type 4, 2 mg ml, in HBS
- MEM / D-Va1 medium a medium in which L-valine was replaced with D-valine in MEM medium; Gibco
- MEM / D-Va1 medium a medium in which L-valine was replaced with D-valine in MEM medium; Gibco
- a serum-free K1 medium 50:50
- a hormone and a growth factor for specifically growing epithelial cells, and free of factors involved in fibroblast proliferation.
- cells are 10 ° /. ⁇ ⁇ In MEM / D—Va1 medium containing fetal serum: After culturing for ⁇ 2 days and confirming cell adhesion and proliferation, the medium was replaced with serum-free K1 medium, and culturing was continued for about another week. Cells were seeded in plates Koten grayed in advance 0.1% gelatin and cultured in co 2 incubator within one.
- an anti-albumin antibody (Egret polyclonal antibody, manufactured by Sigma) was used as the primary antibody, and a biotin-labeled anti-albumin antibody was used as the secondary antibody.
- the primary antibody is adsorbed to a 96-well immunoplate, the above cell extract ( ⁇ ⁇ 1 ⁇ well) is added and reacted at room temperature for 2 hours. Then, a secondary antibody diluent is added, and Allowed to react for hours. After washing the wells, color development was detected using a detection kit (Vector Laboratories, Vectorstin ABC-PO kit) containing streptavidin and biotin-labeled sabiperoxidase.
- a detection kit Vector Laboratories, Vectorstin ABC-PO kit
- Proximal tubular cells are known to induce intracellular cAMP production in response to parathyroid hormone (PTH) but not to vasopressin (AVP).
- PTH parathyroid hormone
- AVP vasopressin
- the cell surface was washed twice with a medium (MEMZD-Va1 medium). Thereto, the PTH (10 “7 M) or A VP (1 U / m 1 ), I BMX; was added Caro with (3-isobutyl-1-Mechirukisa Nchin c AMP phosphodiesterase inhibitors) (10_ 4 M) Medium As a control, a medium to which only IBMX was added was added.
- cAMP in the cells and culture medium was extracted with 65% ethanol, and the amount of cAMP was determined by ELISA (using the cAMP EIA system kit from Amersham). It was measured.
- the amount of intracellular cAMP was found to be about 1.6 times that of the control, confirming that the primary culture contained proximal tubular cells. .
- the cAMP level was about 4.6 times that of the control, indicating that some cells not derived from proximal tubular cells were also contaminated.
- hypoxia inducible factor HIr binding-site
- a novel therapeutic and / or prophylactic agent for renal disease can be screened accurately and efficiently.
- the therapeutic agent and Z or the prophylactic agent identified or characterized by the method of the present invention are excellent therapeutic agents for renal diseases having a clear mechanism of action.
- Z or prophylactic are excellent therapeutic agents for renal diseases having a clear mechanism of action.
- the novel cell line of the present invention maintains the physiological characteristics of proximal tubular epithelial cells well, and is useful for research and development of therapeutic agents for renal diseases and the like.
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AT00909752T ATE445837T1 (de) | 1999-05-27 | 2000-03-21 | Heilmittel für nierenkrankheiten und verfahren zum screenen selbiger |
AU31957/00A AU3195700A (en) | 1999-05-27 | 2000-03-21 | Remedies for kidney diseases and method for screening the same |
US09/979,765 US6794154B1 (en) | 1999-05-27 | 2000-03-21 | Remedies for kidney diseases and method for screening the same |
DE60043152T DE60043152D1 (de) | 1999-05-27 | 2000-03-21 | Heilmittel für nierenkrankheiten und verfahren zum screenen selbiger |
EP00909752A EP1180686B1 (en) | 1999-05-27 | 2000-03-21 | Remedies for kidney diseases and method for screening the same |
DK00909752T DK1180686T3 (da) | 1999-05-27 | 2000-03-21 | Lægemidler til nyresygdomme og fremgangsmåde til screening deraf |
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JP26642599A JP3589113B2 (ja) | 1998-09-24 | 1999-09-21 | 腎疾患治療薬およびそのスクリーニング方法 |
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US10/809,395 Division US20040185503A1 (en) | 1998-09-24 | 2004-03-26 | Therapeutic agents for renal diseases and method for screening the same |
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CN117016486A (zh) * | 2023-07-20 | 2023-11-10 | 澎立生物医药技术(上海)股份有限公司 | 一种IgA肾病合并膜性肾病的动物模型构建方法 |
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WO2004071534A1 (ja) * | 2003-02-17 | 2004-08-26 | Takeda Pharmaceutical Company Limited | 腎疾患の予防・治療剤 |
US7411060B2 (en) * | 2003-04-16 | 2008-08-12 | Academia Sinica | Transgenic fish germline expression driven by liver fatty acid binding (L-FABP) gene promoter and applications thereof |
DE102005026710A1 (de) * | 2005-06-09 | 2006-12-14 | Basf Ag | Verfahren zum Testen von Substanzen oder Substanzgemischen, dessen Verwendung und entsprechende Analysekits |
WO2008104304A1 (en) * | 2007-02-27 | 2008-09-04 | Bayer Schering Pharma Aktiengesellschaft | Fabp3 as a biomarker for ppara modulators |
RU2492858C2 (ru) | 2007-04-11 | 2013-09-20 | Омерос Корпорейшн | Композиции и способы профилактики и лечения зависимостей |
US20160331729A9 (en) * | 2007-04-11 | 2016-11-17 | Omeros Corporation | Compositions and methods for prophylaxis and treatment of addictions |
US11241420B2 (en) | 2007-04-11 | 2022-02-08 | Omeros Corporation | Compositions and methods for prophylaxis and treatment of addictions |
CN103937737B (zh) | 2008-11-12 | 2023-05-23 | 因瑞金公司 | 分离的肾细胞及其用途 |
BRPI1009141A2 (pt) | 2009-03-11 | 2016-03-08 | Omeros Corp | composições e métodos para profilaxia e tratamento de vícios |
JP5565607B2 (ja) | 2009-07-15 | 2014-08-06 | 国立大学法人 東京大学 | 敗血症又は多臓器不全の予後診断方法及び予後診断用キット |
KR101975212B1 (ko) | 2010-05-12 | 2019-05-07 | 인리젠 | 생물활성 신장 세포 |
EP2773955B1 (en) * | 2011-11-04 | 2018-07-18 | inRegen | Drug screening and potency assays |
US20140178456A1 (en) * | 2012-08-30 | 2014-06-26 | Udaya Sankar Devanaboyina | Methods and compositions for treating type 2 diabetes and related conditions |
EP3316159A4 (en) | 2015-06-25 | 2019-08-14 | Advanced Telecommunications Research Institute International | PREDICTIVE EQUIPMENT BASED ON A SYSTEM ASSOCIATED WITH SEVERAL INSTITUTIONS AND PREDICTION PROGRAM |
CN109414504B (zh) | 2016-03-29 | 2022-04-08 | 无限生物制药公司 | 药物组合物或食品组合物及评价活性成分体内效果的方法 |
WO2017170610A1 (ja) * | 2016-03-29 | 2017-10-05 | 株式会社国際電気通信基礎技術研究所 | 腎機能低下、慢性腎疾患及び腎不全からなる群から選択される少なくとも一種の疾患を予防、又は治療するための有効成分の候補物質のスクリーニング方法 |
US11123372B2 (en) | 2016-07-29 | 2021-09-21 | Prokidney | Bioactive renal cells for the treatment of chronic kidney disease |
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US20020115699A1 (en) * | 1994-02-10 | 2002-08-22 | Smithkline Beecham P.L.C. | Method for treating renal disease |
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CN117016486A (zh) * | 2023-07-20 | 2023-11-10 | 澎立生物医药技术(上海)股份有限公司 | 一种IgA肾病合并膜性肾病的动物模型构建方法 |
CN117016486B (zh) * | 2023-07-20 | 2024-05-14 | 上海澎立生技医药研究有限公司 | 一种IgA肾病合并膜性肾病的动物模型构建方法 |
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US20040185503A1 (en) | 2004-09-23 |
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DE60043152D1 (de) | 2009-11-26 |
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