CaR receptor as a mediator of migratory cell chemotaxis and/or chemokinesis
View Patent ↗This invention relates to methods and compositions for modulating movement of eukaryotic cells with migratory capacity. More specifically, the invention relates to methods and compositions for modulating movement of CaR receptor expressing cells of hematopoietic, neural, epithelial, endothelial, or mesenchymal origin, in a specific site in a subject. The foregoing are useful, inter alia, in the treatment of conditions characterized by a need to modulate migratory-cell movement associated with specific sites in a subject. Specific sites include sites of inflammation and modulation of migratory-cell movement is movement away from an agent source, or repulsion. The invention also relates to methods for manipulating hematopoeitic progenitor cells and related products. In particular the invention includes methods and products for using CaR receptor-related compositions to enhance mobilization of hematopoietic progenitor cells, to improve the efficiency of targeting cells to the bone marrow, and/or to modulate hematopoietic progenitor cell function.
1. A method of inhibiting migration of calcium-sensing receptor expressing hematopoietic cells to a specific site in a subject, comprising:
locally administering to a specific site in a subject in need of such treatment a calcium-sensing receptor antagonist in an amount effective to inhibit migration of calcium-sensing receptor expressing hematopoietic cells to the specific site in the subject.
2. The method of claim 1 , wherein the specific site is a site of inflammation.
3. The method of claim 2 , further comprising co-administration of a non-calcium-sensing receptor antagonist that inhibits migration of immune cells to the site of inflammation in the subject.
4. The method of claim 3 , wherein the non-calcium-sensing receptor antagonist is an antiinflammatory agent.
5. The method of claim 1 , wherein the subject has an autoimmune disease.
6. The method of claim 5 , wherein the autoimmune disease is rheumatoid arthritis, uveitis, insulin-dependent diabetes mellitus, hemolytic anemias, rheumatic fever, Crohn's disease, Guillain-Barre syndrome, psoriasis, thyroiditis, Graves'disease, myasthenia gravis, glomerulonephritis, autoimmune hepatitis, or systemic lupus erythematosus.
7. The method of claim 1 , wherein the subject has an abscess, a transplant, an implant, atherosclerosis, or myocarditis.
8. the method of claim 7 , wherein the hematopoietic cells are hematopoietic progenitor cells.
9. The method according to any of the claims 1 , 2 , 7 and 8 , wherein the calcium-sensing receptor antagonist is N-[(R)-2-hydroxy-3-(2-cyano-3-chlorophenoxy) propyl]-1-dimethyl-2-(2-napthyl) ethylamine (NPS-2143).