WO2009021468A1 - Péptidos penetradores a células y su uso fusionados a biomoléculas con acción terapéutica - Google Patents
Péptidos penetradores a células y su uso fusionados a biomoléculas con acción terapéutica Download PDFInfo
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- WO2009021468A1 WO2009021468A1 PCT/CU2008/000006 CU2008000006W WO2009021468A1 WO 2009021468 A1 WO2009021468 A1 WO 2009021468A1 CU 2008000006 W CU2008000006 W CU 2008000006W WO 2009021468 A1 WO2009021468 A1 WO 2009021468A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/12—Viral antigens
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/005—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
- C07K14/01—DNA viruses
- C07K14/025—Papovaviridae, e.g. papillomavirus, polyomavirus, SV40, BK virus, JC virus
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/62—DNA sequences coding for fusion proteins
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/58—Medicinal preparations containing antigens or antibodies raising an immune response against a target which is not the antigen used for immunisation
- A61K2039/585—Medicinal preparations containing antigens or antibodies raising an immune response against a target which is not the antigen used for immunisation wherein the target is cancer
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/60—Medicinal preparations containing antigens or antibodies characteristics by the carrier linked to the antigen
- A61K2039/6031—Proteins
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- C12N2710/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA dsDNA viruses
- C12N2710/00011—Details
- C12N2710/20011—Papillomaviridae
- C12N2710/20034—Use of virus or viral component as vaccine, e.g. live-attenuated or inactivated virus, VLP, viral protein
Definitions
- the present invention falls within the field of immunology, cell biology and cancer. Specifically, the methods and compositions of the present invention involve the binding of biomolecules of different origin to cell-penetrating peptides (PPC) to induce a potent therapeutic action.
- PPC cell-penetrating peptides
- the biomolecules can be antigenic peptides, nucleic acids, oligonucleotides, whole proteins, nanoparticles and liposomes. Many of the drugs are internalized with great difficulty in the cells, which is considered one of the main limitations in the development of therapeutic agents. Therefore, the fusion of therapeutic agents to PPCs can be a very effective strategy to improve their pharmacological properties.
- Some PPCs that have been identified include the Tat protein of the human immunodeficiency virus (Frankel, AD, and Pabo, CO (1988) Cellular uptake of the Tat protein from human immunodeficiency virus.
- CeII 55: 1189-1193 the VP22 protein of the Herpes simplex virus (Elliott, G., and O'Hare, P. (1997) Intercellular trafficking and protein delivery by a herpesvirus structural protein CeII 88: 223-233), and fibroblast growth factor (Rojas M, et al. (1998) Genetic engineering of protein with cell. Membrane permeability. Nat Biotechnol. 16: 370-375).
- the Tat peptide has been used to transduce proteins to cells both in vitro and in vivo (Lindgren, M et al. (2000) Cell-penetrating peptides. Trenos Pharmacol. Sci. 21: 99-103).
- HPVs can play an important role in cancer of the anus, vulva, vagina and some oropharyngeal cancers (the central part of the throat that includes the soft palate, the base of the tongue and the tonsils) ( Division of STD Prevention, Prevention of Genital HPV infection and sequelae: Report of an external consultants' meeting, Atlanta, GA: Centers for Disease Control and Prevention, 1999).
- HPVs are a group of more than 100 types of viruses and of them more than 30 types are usually transmitted by sexual contact. Some types of HPV are known as “low risk” viruses because they rarely turn into cancer. HPVs that are more likely to become cancer are known as “high risk” viruses. Both high-risk and low-risk viruses can cause the growth of abnormal cells, but generally only high-risk types of HPV can cause cancer. High-risk HPVs that are transmitted through sexual contact are types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68, 69 and possibly some others. These types of high-risk HPV cause tumors that are generally flat and almost invisible.
- Genital warts are generally related to two types of low-risk human papillomavirus, HPV-6 and HPV-11.
- HPVs are small, double-stranded (50-60 nm) double-stranded DNA viruses with a circular DNA genome of 7800 to 7900 base pairs. The genome contains three main regions, one that codes for late genes, another that codes for early genes and a non-coding region (Park TW et al. (1995) Molecular biology of cervical cancer and its precursors. Cancer 76: 1902- 1913).
- the region of late genes has two open reading fronts that encode the capsid proteins of virus L1 (majority) and L2 (minority).
- the early gene region includes six open reading fronts, designated as E1, E2, E4, E5, E6 and E7.
- the E6 and E7 proteins are critical oncoproteins for viral replication as well as for the immortalization of the host cell and its transformation.
- the methods commonly used to treat HPV injuries are cryosurgery (freezing that destroys tissue), the electrosurgical excision procedure with a handle (LEEP), in which tissue is removed using a hot wire ring) and Ia conventional surgery. Similar treatments can be used for external genital warts. In addition, some medications can be administered to treat them (Centers for Disease Control and Prevention. Sexually transmitted diseases treatment guidelines 2002. Centers for Disease Control and Prevention. Morbidity and Mortality Weekly Report 2002; 51: 1-78).
- the dendritic cell and human cancer vaccines Curr Opin Immunol 12: 583-588 due to the fact that the response of reactive T cells against tumors is very weak, therefore, the main challenge of cancer vaccines is the breakdown of tolerance and the generation of a strong and lasting immunity through the manipulation of the antigen and the delivery or distribution system of the antigen to the cell.
- the present invention in contrast to the state of the art Previously, it proposes the use of a new family of PPC and compositions containing HPV antigens genetically fused to this new family of PPC, which enhance the cellular and antitumor immune response against HPV antigens and against cells that exhibit HPV antigens including tumors associated with HPV.
- the present invention solves the aforementioned problem by providing a new family of cell-penetrating peptides (PPC) that can be used as a platform to fuse biomolecules and achieve effective drug internalization in cells.
- the new PPC family consists of the peptide corresponding to region 32-51 of the LALF protein (SEQ ID NO. 1) and its analog peptides with specific amino acid substitutions at different positions for the amino acid alanine: L-2 ( SEQ ID NO. 2, replacement in position 2), L-8 (SEQ ID NO. 3, replacement in position 8), L-12 (SEQ ID NO. 4, replacement in position 12) and L-20 (SEQ ID NO. 5, replacement in position 20).
- the present invention provides a pharmaceutical composition containing HPV antigens genetically fused to the aforementioned PPC family that enhances Ia immune response against HPV antigens, where HPV protein antigens are covalently linked to the PPC family.
- This genetic fusion guarantees the delivery and distribution of HPV antigens to cells, guaranteeing the processing of the cargo protein and the presentation to T cells of antigenic epitopes, for a prolonged time resulting in a potent cellular and antitumor immune response.
- the immune response can be cellular, in particular a cell-mediated cytolytic response against the HPV protein antigen.
- the compositions can be used therapeutically.
- the induction of the immune response in a subject refers to the generation of response that exceeds, in such magnitude and quality, the response previously induced by contact with HPV protein antigens exhibited both by the virus, or by the infected subject, or by the transformed cells of the subject.
- pharmaceutical compositions are used to generate an immune response against tumor cells that express and exhibit an HPV protein antigen.
- the preferred HPV white protein antigens for the compositions are the early viral proteins E6 and E7 which are known to be consistently expressed in tumors associated with HPV.
- the pharmaceutical compositions comprise the HPV E6 or E7 protein antigen bound to the PPC LALF at the nucleotide level, which allows the expression and purification of a protein that contains both the E6 / E7 antigen sequences and the PPC LALF.
- the fusion protein can also be mixed with an adjuvant.
- the compositions can be used therapeutically in the host previously infected with HPV to prevent future viral proliferation or to eliminate cells that proliferate as a consequence of HPV infection, including tumors that express and exhibit an HPV antigen or present a portion of the antigen.
- the protein antigen includes the complete protein or a polypeptide portion of the HPV protein exhibited on the surface of the HPV or in the infected cell of a subject as well as in a peptide presented by an infected cell as a result of the processing and presentation of HPV proteins, for example, through the typical MHC class I or II pathways.
- HPV genomes of several different types of HPV were cloned and characterized by DNA sequence analysis.
- Bacterial vectors that contain the complete or partial HPV genome are available from several sources that include the American Tissue Culture Collection (abbreviated "American Type Culture Collection”, abbreviated ATCC).
- ATCC American Type Culture Collection
- Some additional types of HPV useful for the practice of the present invention can be isolated and typed by methods that have been previously established for these purposes, whose methods are well known in the state of the art.
- E6 and E7 proteins are consistently expressed in cervix cancer (Zur Hausen H. (1987) Papillomaviruses in human cancer.
- E6 and E7 are the preferred targets for immuno intervention, and therefore, are the preferred HPV protein antigens of the pharmaceutical compositions of the present invention to be used in the treatment of cancer associated with HPV
- the pharmaceutical composition described herein can be used to enhance an immune response, particularly a cell-mediated cytolytic response, against an HPV, or an HPV-infected or transformed cell that express an HPV antigen.
- composition described herein may contain and be administered together with adjuvants. It can also be used ex vivo as a way of stimulating the white blood cells obtained from a subject to induce, expand and spread, in vitro, specific immune cells against an HPV antigen that are subsequently reintroduced into the subject.
- the effective amount is the amount that when administered results in the induction of an immune response.
- the amount of the pharmaceutical composition administered to the host may vary depending on several factors, including the antigen or HPV protein antigens used, the size, age, body weight, general health, sex and diet, as well as their level of immune response in general.
- Figure 1 Image by fluorescence microscopy demonstrating the ability of the LALF PPC to penetrate the cell.
- FIG. 7 Graph showing the effect of treatment with LALF-E7 on the volume of established tumors of TC-1 cells in animals
- Figure 8. Graph showing that the effect of treatment with LALF-E7 on the volume of established tumors of TC-1 cells in animals is dependent on covalent fusion.
- Figure 9. Graph showing the count of effector point cells (CFS) by 10 6 of a pool of splenocytes of 3 mice immunized with different preparations
- Different cell lines were used in this embodiment (Table 1).
- the cells were grown on sterile coverslips 22mm place overnight at 37 0 C and 5% CO2 in RPMI 1640 with 10% inactivated fetal bovine serum and 2 mM glutamine. Subsequently Ie added 25 or 50 .mu.M CFP LALF or its analogues Biotinylated L-2 and L-20 and incubated at 37 0 C and 4 0 C and at different times (10 min, 20 min, 30 min, 1 hour and 2 hours). The cells were washed gently with PBS and fixed with 4% paraformaldehyde for 20 min at room temperature. Three washes were performed with PBS.
- Permeabilization of the cells was performed with 0.5% Triton X-100 for 15 min at room temperature. Three washes were performed with PBS. Blocking was performed with 1% SFB in PBS for 1 hour at room temperature. Three washes were performed with PBS. Incubate with 1: 50,000 streptavidin-fluorescein in PBS for 45 minutes in a dark chamber. Wash extensively with PBS. Mount the covers on objects on slides with aqueous mounting medium. Examine using a fluorescence microscope with the appropriate filter. Table. one
- the C57BL / 6 mice were euthanized by dislocation of the cervical and the spleens were removed aseptically.
- Cell suspensions of the animals extracted from the spleens were collected in a pool and gently homogenized.
- the splenocytes were washed and the erythrocytes were used with a 0.83% NH 4 CI solution. They were subsequently washed and finally separated in different tubes with 20x10 6 of total cells resuspended in 10 mL of fresh RPMI 1640 medium supplemented with 7% fetal bovine serum (in English "Fetal Bovine Serum", abbreviated FBS).
- Each preparation was incubated with 0.8 mg of the biotinylated peptides L-2 (278 ⁇ M) and L-20 (280 ⁇ M) at different times: 10 minutes, 30 minutes, 1 hour and 18 hours. Incubations were performed at 37 0 C and 5% CO2. The cells were mounted on an object holder, fixed and permeabilized. The cells were treated with propidium lodide to stain the nucleus and with streptavidin-fluorescein to detect the peptides inside the cells. The results obtained from observation by confocal microscopy (Figure 2) showed that peptides L-2 and L-20 are internalized and short incubation times (30 min). These results are similar when using the LALF PPC and the L-8 and L-12 analogues.
- Example 3 Cloning and expression of the PPC LALF recombinant fusion protein or its analogues with E7 To obtain the recombinant fusion of PPC LALF with the E7 protein, the chemical synthesis of the two DNA strands of each of the components of the fusion separately was started.
- the PPC LALF DNA fragment (SEQ ID NO. 6) carries at the 5 ' and 3 ' ends, the open restriction sites Ncol and Hindlll, respectively.
- the DNA sequence of the HPV 16 E7 gene carries at the 5 ' and 3 ' ends, the Hindlll and BamHI open restriction sites, respectively.
- the ligation reaction was transformed into a preparation of competent E. coli cells. The colonies obtained were examined by analysis with 5 restriction enzymes.
- the positive clones were examined by double chain sequencing, using a 27 base oligonucleotide (SEQ ID NO. 8) that produces hybridization with E7, thereby confirming the correct fusion (SEQ ID NO. 9 and 10) and the replacement of the cysteine with a glycine at the binding site to the Rb protein.
- the selected clone ( Figure 3) was named pPEPE7M-7.
- Plasmid pPEPE7M-7 was transformed into the E. coli strain BL-21.
- the transformed bacteria were subjected to fermentation processes in minimal medium composed of M9 salt and supplemented with 0.1 mM CaCI2; 1 mM MgCl2; 1% glucose; 1% hydrolyzed casein; 0.5% tryptone and 100 ⁇ g / mL of ampicülina for 24 hours at 37 0 C with a stirring of 250 rpm.
- the sedimentation of the cells was carried out by centrifugation of 10,000 rpm for 20 minutes at 4 0 C.
- Five grams of biomass were resuspended in 25 mL of a buffer solution of 50 mM NaH 2 PO4 ⁇ 0.3 M NaCI; pH 8 and underwent a cell rupture by ultrasound (0.5 cycles, 70 amplitude for 1 minute).
- the breaking process was repeated 5 times.
- the broken cells were homogenized and centrifuged at 10,000 rpm for 30 minutes at 4 0 C. The supernatant was removed from this centrifugation and the insoluble fraction containing the recombinant protein was collected for later purification.
- the supernatant was removed and the insoluble fraction was resuspended in 30 mL of 50 mM NaH 2 PO4 buffer solution; 0.3 M NaCL; pH 8 and homogenization was performed as described previously.
- the homogenate was centrifuged at 10,000 rpm for 20 minutes at 4 0 C.
- To perform the extraction of the protein from the insoluble fraction 1 gram of it was resuspended in 100 mL of 4 M urea in a 50 mM NaH 2 PO 4 buffer; 0.3 M NaCI, pH 8. Homogenization was performed with a Politron at a rotation speed of 9500 rpm for 1 minute. Subsequently, the extraction was centrifuged at 10,000 rpm for 20 minutes at 4 0 C.
- the protein of interest In the soluble fraction is the protein of interest which was applied to a Ni-NTA column (His-Select TM Nickel Affinity GeI, Sigma) equilibrated with urea 4 M in 50 mM NaH 2 PO 4 buffer; 0.3 M NaCL; pH 8 and 5 mM imidazole.
- the column was washed with the same equilibrium solution but with 40 mM imidazole and the protein was eluted with 250 mM imidazole.
- the eluate underwent a dialysis process with a 1x pH 8.4 Tris buffer using a 10 ⁇ m pore diameter membrane. Finally, the protein was sterilized by filtration through a 0.22 ⁇ m filter.
- Example 5 Demonstration by fluorescence microscopy that the CPP LALF or their analogues internalize the protein E7 to the cell charge J774 cells were grown on sterile coverslips 22mm place overnight at 37 0 C and 5% CO2 in RPMI 1640 with 10% inactivated bovine fetal serum and 2 mM glutamine. Subsequently, different covers of objects were independently incubated with 1.66 ⁇ M of the LALF-E7 fusion protein, 1.66 ⁇ M of the E7 protein and PBS (as a negative control) at 37 0 C for 30 min, 1 hour and 2 hours . As a positive control, CasKi cells (human cells expressing HPV 16) were also cultured and maintained under the same experimental conditions.
- CasKi cells human cells expressing HPV 16
- J774 cells were grown on sterile coverslips 22mm place overnight at 37 0 C and 5% CO2 in RPMI 1640 with 10% inactivated fetal bovine serum and 2 mM glutamine. Subsequently they were separated into three aliquots of 5x10 6 cells. They were incubated separately with 25 uM of the fusion protein LALF-E7, 25 uM of the protein E7 and PBS during 4 hours at 37 0 C. The cells were centrifuged at 1000 rpm for 10 minutes. The pellet was washed three times with PBS. Subsequently, the cells were resuspended in 100 ⁇ L of RIPA buffer (Promega) and subjected to 3 vortex cycles for 10 seconds and 2 minutes on ice.
- RIPA buffer Promega
- the broken cells were centrifuged at 12,000 rpm for 15 minutes to separate the cell extract.
- the protein concentration was determined thereto and 10 ⁇ g of total protein was applied in a 15% polyacrylamide electrophoresis gel.
- the gel was transferred to a nitrocellulose membrane and after blocking it was incubated with a polyclonal IgG anti-E7 antibody of HPV 16 (Santa Cruz) obtained in goat and diluted in PBS (1: 100) for 2 hours at temperature ambient. Three washes were performed with PBS.
- the membrane was incubated for 45 minutes at room temperature and in a dark chamber with a goat anti-IgG antibody conjugated to peroxidase (Sigma) and diluted in PBS (1: 5000).
- the protein obtained in E. coli from the recombinant LALF-GFP fusion (GFP) was used to verify that the PPC LALF or its analogs could internalize the protein charge.
- the GFP (GenBank Accession # U55762) was obtained with the use of the polymerase chain reaction from the plasmid pEGFP-N1 of Clontech using the oligonucleotides with SEQ ID NO. 11 and 12. Both oligonucleotides have restriction sites used for cloning (Hindlll- with sense and BamHI- with antisense).
- the synthetic LALF fragment and the GFP gene obtained by PCR were inserted with the use of T4 ligase in the vector pM238 in a similar manner as in Example III.
- the recombinant clone is identified with SEQ ID NO. 13 and 14.
- an experiment similar to that of example V was performed, but in this case the J774 cells were incubated with LALF-GFP, biotinylated LALF, GFP and PBS.
- Example 8 Treatment of tumors established in mice with the fusion of PPC LALF or its analogues with E7
- the tumor cell line TC-1 expressing the E7 protein of HPV-16 was used. It was derived from a primary culture of lung cells of C57BL / 6 mice through the immortalization and transformation of the cells with the E6 and E7 genes of HPV-16 and an activated human c-Hras gene as described in Lin KY et al. (1996) Treatment of established tumors with a novel vaccine that enhances major histocompatibility class Il presentation of tumor antigen. Cancer Res. 56: 21-26. For the inoculation of the tumors, the TC-1 cells, supplied by Dr. T.-C.
- Each group included 10 animals. Two immunizations were performed, every 14 days. Group 1 was immunized with the recombinant protein LALF-E7; group 2 with the recombinant E7 protein; group 3 with the synthetic LALF peptide and group 4 with PBS. Immunizations were performed subcutaneously on the flank of the mouse and in 0.2 mL volumes.
- Example 9 Treatment of tumors established in mice with the fusion of PPC LALF or its analogues with E7 (LALF-E7) and the mixture of PPC LALF or its analogues with E7 (LALF + E7)
- LALF-E7 the mixture of PPC LALF or its analogues with E7
- LALF + E7 the mixture of PPC LALF or its analogues with E7
- Each group included 10 animals. Two immunizations were performed, every 14 days. Group 1 was immunized with the LALF-E7 fusion protein; group 2 with the LALF + E7 mixture; group 3 with LALF; group 4 with E7 and group 5 with PBS. Immunizations were performed subcutaneously on the flank of the mouse and in 0.2 mL volumes. Tumor kinetics in the different groups was followed by the tumor volume which was determined and calculated as previously described in Example 9. The average volume of each group +/- the standard deviation 30 days after inoculation the tumors are represented. in Figure 8.
- Example 10 Comparison of the ability of pharmaceutical preparations to induce a cellular immune response.
- Group 1 was immunized with 30 ⁇ g of the recombinant protein LALF-E7; group 2 with 30 ⁇ g of the E7 recombinant protein; group 3 with 8 ⁇ g of the synthetic LALF peptide and group 4 with PBS. Immunizations were performed. subcutaneously on the flank of the animal with volumes of 0.2 ml_ and without adjuvants. Two doses were administered every 14 days. Seven days after the second immunization, the mice were euthanized by dislocation of the cervical and the splenocytes were removed aseptically for later analysis in an ELISPOT anti-gamma interferon (anti-IFN- ⁇ ) assay. The animal cell suspensions for each group were collected in a pool and gently homogenized.
- the splenocytes were washed and the erythrocytes were used with a 0.83% NH 4 CI solution. They were subsequently washed and finally resuspended in a fresh medium of RPMI 1640 supplemented with 10% fetal bovine serum (in English "Fetal Bovine Serum", abbreviated FBS) and 10 U / mL of human IL-2 (hlL-2).
- FBS fetal bovine serum
- human IL-2 human IL-2
- Mouse EL4 cells (H-2 b ), which do not express HPV-16 E7 epitopes were used as white cells, which were previously pulsed at a concentration of 10 ⁇ M with peptide 49 RAHYNIVTF 57 corresponding to the mouse CTL epitope C57BL / 6, H- 2 b (Feltkamp MC et al. (1993) Vaccination with cytotoxic T lymphocyte epitope containing peptide protects against a tumor induced by human papillomavirus type 16-transformed cells. Eur. J. Immunol. 23: 2242-2249 ). The cells were subsequently suspended in RPMI 1640 supplemented with 10% FBS and hlL-2, which were used as antigen presenting cells. The non-pulsed EL4 cells were also included for the determination of the background of IFN- ⁇ secretory cells.
- the assay for the determination of IFN- ⁇ secretion was performed as previously described (Vazquez-Blomquist D. et al. (2002) Induction of a strong HlV-specific CD8 + T cell response in mice using a fowlpox virus vector expressing an HIV-1 multi-CTL-epitope polypeptide Viral Immunol. 5 (2): 337-356).
- the 96-well plates with the bottom coated with nitrocellulose paper were coated with 100 ⁇ L of 5 ⁇ g / mL of the capture Ab and incubated overnight at 4 0 C. After three washes with PBS, the plates were blocked with RPMI 1640 supplemented with 10% FBS at 37 0 C for one hour.
- Splenocytes (10 6 , 2x10 5 and 4x10 4 cells per well) and white EL4 cells (10 5 per well) were added respectively in a final volume of 0.2 mL and co-incubated in duplicate at 37 0 C and 5 % of CO 2 for 17 hours. After incubation, a standard ELISPOT test was performed (Vazquez-Blomquist D. et al. (2002) Induction of a strong HIV-spec ⁇ f ⁇ c CD8 + T cell response in mice using a fowlpox virus vector expressing an HIV-1 multi- CTL-epitope polypeptide. Viral Immunol. 5 (2): 337-356).
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Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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US12/671,335 US8673313B2 (en) | 2007-07-31 | 2008-07-31 | Cell penetrating peptides and its use fused to biomolecules with therapeutic action |
EP08784156.5A EP2186526B1 (en) | 2007-07-31 | 2008-07-31 | Cell-penetrating peptides and use thereof bonded to biomolecules with therapeutic action |
CN2008801095459A CN101808658B (zh) | 2007-07-31 | 2008-07-31 | 细胞穿透肽及其与具有治疗作用的生物分子相融合的用途 |
CA2694735A CA2694735C (en) | 2007-07-31 | 2008-07-31 | Cell-penetrating peptides and use thereof bonded to biomolecules with therapeutic action |
ES08784156.5T ES2610408T3 (es) | 2007-07-31 | 2008-07-31 | Péptidos de penetración a células y su uso fusionados a biomoléculas con acción terapéutica |
BRPI0814452-4A2A BRPI0814452A2 (pt) | 2007-07-31 | 2008-07-31 | Composição que contém um peptídeo penetrador em células, uso de uma composição farmacêutica e método de tratamento de um tumor |
KR1020107004635A KR101515445B1 (ko) | 2007-07-31 | 2008-07-31 | 세포 투과 펩타이드 및 치료 작용을 갖는 생체 분자에 결합된 이의 용도 |
ZA2010/01337A ZA201001337B (en) | 2007-07-31 | 2010-02-24 | Cell-penetrating peptides and use thereof bonded to biomolecules with therapeutic action |
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CU20070180A CU23674A1 (es) | 2007-07-31 | 2007-07-31 | Péptidos penetradores a células fusionados a una biomolécula con acción terapéutica |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011120474A1 (es) * | 2010-04-01 | 2011-10-06 | Centro De Ingeniería Genética Y Biotecnología | Metodo para inhibir la replicacion del vih en celulas de mamiferos y en humanos |
CN102212124A (zh) * | 2011-05-17 | 2011-10-12 | 厦门大学 | 拟穴青蟹抗脂多糖因子及其制备方法与应用 |
WO2011150897A3 (es) * | 2010-05-31 | 2012-03-15 | Centro De Ingeniería Genética Y Biotecnología | Método para la terapia del cáncer |
US10759839B2 (en) | 2016-04-07 | 2020-09-01 | Neoregen Biotech | Cell-penetrating peptide |
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BR112014031891A2 (pt) | 2012-06-19 | 2017-08-01 | Univ Minnesota | direcionamento genético nas plantas utilizando vírus de dna |
CN105531372A (zh) | 2013-06-14 | 2016-04-27 | 塞尔克蒂斯股份有限公司 | 植物中非转基因基因组编辑方法 |
KR101695792B1 (ko) * | 2014-09-04 | 2017-01-12 | 디오셀 주식회사 | 신규 세포막 투과 펩티드 및 생리활성 물질 전달체로서의 그의 용도 |
KR102484312B1 (ko) * | 2020-05-14 | 2023-01-02 | 한국화학연구원 | 고효능 사스 코로나바이러스 2 항원 및 이를 포함하는 백신 조성물 |
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WO2011120474A1 (es) * | 2010-04-01 | 2011-10-06 | Centro De Ingeniería Genética Y Biotecnología | Metodo para inhibir la replicacion del vih en celulas de mamiferos y en humanos |
US9205128B2 (en) | 2010-04-01 | 2015-12-08 | Centro De Ingenieria Genetica Y Biotechnologia | Method for inhibiting HIV replication in mammal and human cells |
US10434137B2 (en) | 2010-04-01 | 2019-10-08 | Centro De Ingenieria Genetica Y Biotecnologia | Method for inhibiting HIV replication in mammal and human cells |
WO2011150897A3 (es) * | 2010-05-31 | 2012-03-15 | Centro De Ingeniería Genética Y Biotecnología | Método para la terapia del cáncer |
US8729226B2 (en) | 2010-05-31 | 2014-05-20 | Centro De Ingenieria Genetica Y Biotecnologia | Cancer therapy method |
US9145554B2 (en) | 2010-05-31 | 2015-09-29 | Centro De Ingenieria Genetica Y Biotecnologia | Cancer therapy method |
CN102212124A (zh) * | 2011-05-17 | 2011-10-12 | 厦门大学 | 拟穴青蟹抗脂多糖因子及其制备方法与应用 |
CN102212124B (zh) * | 2011-05-17 | 2012-07-18 | 厦门大学 | 拟穴青蟹抗脂多糖因子及其制备方法与应用 |
US10759839B2 (en) | 2016-04-07 | 2020-09-01 | Neoregen Biotech | Cell-penetrating peptide |
Also Published As
Publication number | Publication date |
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BRPI0814452A2 (pt) | 2015-01-06 |
KR101515445B1 (ko) | 2015-05-07 |
CN101808658A (zh) | 2010-08-18 |
CN101808658B (zh) | 2013-10-23 |
CA2694735C (en) | 2014-09-09 |
AR068329A1 (es) | 2009-11-11 |
ZA201001337B (en) | 2010-11-24 |
CU23674A1 (es) | 2011-05-27 |
EP2186526A1 (en) | 2010-05-19 |
KR20100045498A (ko) | 2010-05-03 |
CA2694735A1 (en) | 2009-02-19 |
EP2186526B1 (en) | 2016-10-26 |
US20120135021A1 (en) | 2012-05-31 |
ES2610408T3 (es) | 2017-04-27 |
US8673313B2 (en) | 2014-03-18 |
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