Methods of organ regeneration using
The invention features methods for increasing or maintaining the number of functional cells of a predetermined type in a mammal (e.g., a human patient), for example, the insulin producing cells of the pancreas, liver cells, spleen cells, or bone cells, that has injured or damaged cells of the predetermined type or is deficient in cells of the predetermined type.
1. A method for increasing or maintaining the number of functional pancreatic islet cells in a pancreas of a human, wherein said pancreas is injured, damaged, or deficient in said pancreatic islet cells, said method comprising administering to said human a composition enriched in pluripotent cells that express the Hox11 gene.
2. The method of claim 1 , further comprising stimulating said pancreas before administering said composition.
3. The method of claim 2 , wherein said pancreas is stimulated by administering TNF-alpha.
4. The method of claim 2 , wherein said pancreas is stimulated by administering a TNF-alpha agonist or a TNF-alpha inducing substance.
5. The method of claim 4 , wherein said TNF-alpha agonist or TNF-alpha inducing substance is Complete Freund's Adjuvant (CFA), ISS-ODN, microbial cell wall components with LPS-like activity, cholera particles, E. coli heat labile enterotoxin, E. coli heat labile enterotoxin complexed with lecithin vesicles, ISCOMS-immune stimulating complexes, polyethylene glycol, poly(N-2-(hydroxypropyl)methacrylamide), synthetic oligonucleotides containing CpG or CpA motifs, monophosphoryl lipid A, Bacillus Clamette-Guerin, γ-interferon, Tissue Plasminogen Activator, LPS, Interleukin-1, Interleukin-2, UV light, a lymphotoxin, cachectin, a TNFR-2 agonist, an intracellular mediator of the TNF-alpha signaling pathway, a NFκB inducing substance, IRF-1, STAT1, a lymphokine, a tumor necrosis factor-alpha (TNF-α) receptor II agonist, or the combination of TNF-alpha and an anti-TNFR-1 antibody.
6. The method of claim 5 , wherein said TNF-alpha agonist or TNF-alpha inducing substance is Complete Freund's Adjuvant, Bacillus Clamette-Guerin, or γ-interferon.
7. The method of claim 2 , wherein said pancreas is stimulated 6-12 hours before administering said composition.
8. The method of claim 1 , wherein said composition is enriched in cells which do not express CD45 protein.
9. The method of claim 8 , wherein said pluripotent cells are enriched from the peripheral blood or tissue of a human by a method comprising: a) providing from the human peripheral blood or tissue that contains pluripotent cells; b) separating pluripotent cells from said peripheral blood or tissue; c) separating said pluripotent cells into a first cell population which expresses CD45 antigen on the surface of said cells and a second cell population which predominantly does not express CD45 antigen on the surface of said cells; and d) selecting said second cell population.
10. The method of claim 1 , wherein said pluripotent cells are derived from the spleen.
11. The method of claim 1 , wherein said pluripotent cells are semi-allogeneic.
12. The method of claim 1 , wherein said pluripotent cells are isogeneic.
13. The method of claim 1 , wherein said composition comprises cells that present MHC class I and peptide, wherein said MHC class I has at least one allele that matches an MHC class I allele expressed by said human.
14. The method of claim 1 , further comprising administering to said human an agent that selectively inhibits, removes, or kills cell populations that interfere or prevent the trafficking of, differentiation of, or growth of Hox-11-expressing pluripotent cells.
15. The method of claim 14 , wherein said cell populations comprise lymphocytes.
16. The method of claim 14 , wherein said agent comprises TNF-alpha.
17. The method of claim 14 , wherein said agent comprises a TNF-alpha agonist or a TNF-alpha inducing substance.
18. The method of claim 17 , wherein said TNF-alpha agonist or TNF-alpha inducing substance is Complete Freund's Adjuvant (CFA), ISS-ODN, microbial cell wall components with LPS-like activity, cholera particles, E. coli heat labile enterotoxin, E. coli heat labile enterotoxin complexed with lecithin vesicles, ISCOMS-immune stimulating complexes, polyethylene glycol, poly(N-2-(hydroxypropyl)methacrylamide), synthetic oligonucleotides containing CpG or CpA motifs, monophosphoryl lipid A, Bacillus Clamette-Guerin, γ-interferon, Tissue Plasminogen Activator, LPS, Interleukin-1, Interleukin-2, UV light, a lymphotoxin, cachectin, a TNFR-2 agonist, an intracellular mediator of the TNF-alpha signaling pathway, a NFKB inducing substance, IRF-1, STAT1, a lymphokine, a tumor necrosis factor-alpha (TNFα) receptor II agonist, or the combination of TNF-alpha and an anti-TNFR-1 antibody.
19. The method of claim 18 , wherein said TNF-alpha agonist or TNF-alpha inducing substance is Complete Freund's Adjuvant, Bacillus Clamette-Guerin, or γ-interferon.
20. The method of claim 1 , wherein said human has an autoimmune disease.
21. The method of claim 20 , wherein said disease is diabetes.