25,26-Dehydro-1.alpha.,23(S,R)-dihydroxycholecalciferol and its

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – 9,10-seco- cyclopentanohydrophenanthrene ring system doai

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2603972, 568379, 568664, A61K 3159

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active

046123083

ABSTRACT:
The syntheses of 25,26-dehydro-1.alpha.,23S-dihydroxycholecalciferol, 25,26-dehydro-1.alpha.,23R-dihydroxycholecalciferol, and the epimeric mixture thereof which are useful as differentiation inducing agents and anti-proliferation agents are described, 25,26-dehydro-1.alpha.,23S-dihydroxycholecalciferol 25,26-dehydro-1.alpha.,23R-dihydroxycholecalciferol and the epimeric mixture thereof are useful for treating tumors and leukemia, and osteoporosis.

REFERENCES:
patent: 4391802 (1983-07-01), Suda et al.
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Reitsma, P. et al., Vitamin D.sub.3 Regulates c-myc Oncogene Expression in HL-60 Leukemic Cells, J. Cell Biol. 97 (5): 347a, 1983.
Rigby, W. F. C. et al., 1,25-Dihydroxyvitamin D.sub.3 Induces Granulocytic Differention and Myeloid Specific Antigens in the HL-60 Promyelocytic Leukemia Cell Line, Blood 62 (5): 153a, 1983.
Olsson, I., and Lund, U., Induction of Differentiation of the Human Histiocytic Lymphoma Cell Line U937 by 1.alpha., 25-Dihydroxycholecalciferol. Cancer Res. 43 (12) 5862-5867, 1983.
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McCarthy, D., 1.alpha.,25-dihydroxyvitamin D.sub.3 Causes Granulocytes from Patients with Chronic Granulocytic Leukemia to Differentiate into Monocytes-macrophages: This Effect is Mediated by a Protein Receptor, Exp. Hematol. 11 (Suppl. 14): 200, 1983.
Honma, Y. et al., 1.alpha.,25-dihydroxyvitamin D.sub.3 and 1.alpha.-hydroxy Vitamin D.sub.3 Prolong Survival Time of Mice Inoculated with Myeloid Proc. Natl. Acad. Sci. USA 80: 201-204, 1983 Leukemia Cells.
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