Abstract
We evaluated the proliferative and differentiative effects of analogs of 1,25(OH)2 vitamin D3 [1,25(OH)2D3] on a chronic myelogenous leukemia cell line, RWLeu-4, which is growth-inhibited and differentiates in response to 1,25(OH)2D3 (ED50-3-10 n M). Side-chain-fluorinated analogs were more potent (ED50=0.7-2 n M) while most of those with altered saturation of the D ring or side-chain carbon-carbon bonds were equally or less effective than 1,25(OH)2D3. However, the two analogs with either two additional double bonds or an extra double and triple bond in the D ring had greater antiproliferatiive activity [1,25(OH)2-16,23-diene D3 (ED50=2.7 n M) and 1,25(OH)2-16-ene-23-yne D3 (ED50=0.7 n M)]. Since the latter of these has been reported to be less potent at mobilizing calcium than 1,25(OH)2D3, it (or a similar compound) may be a candidate for clinical use as an antineoplastic agent.
| Original language | English |
|---|---|
| Pages (from-to) | 190-194 |
| Number of pages | 5 |
| Journal | Journal of Cancer Research and Clinical Oncology |
| Volume | 118 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1992 |
| Externally published | Yes |
Keywords
- Analogs
- Chronic myelogenous leukemia cells
- Differentiation
- Proliferation
- Vitamin D