Anti-leukemic agent useful for inducing differentiation in myeloid leukemia cells
US9820968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Feb 28, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides the compound Ormeloxifene [3, 4-trans-2,2-dimethyl-3-phenyl-4-p-(beta-pyrrolidinoethoxy) phenyl-7-methoxy chroman] as useful in inducing differentiation in wide range of myeloid leukemias including acute promyelocytic leukemia, acute myeloid leukemia and chronic myeloid leukemia where block in differentiation is common feature. Ormeloxifene induced differentiation that is marked by increase in differentiation marker proteins like C/EBPα and surface proteins such as cd11b and granulocyte colony stimulating factor receptor (GCSFr). Differentiated cells having neutrophil like morphology were observed when treated with 1.0 uM to 7.5 uM ORM which clearly indicates that ORM can induce differentiation in myeloid leukemia cells. At higher doses (5 uM to 7.5 uM) there is early onset of myeloid differentiation (24 to 48 h) with reduced no. of cells which is likely due to apoptotic effects of ORM at higher does. In contrary, lower doses (1 uM) induce differentiation after longer duration (6-15 days) with quite reduced apoptotic effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.