The Non-Hodgkin's Lymphoma (NHLs) are neoplasms of the immune system. Currently, less than 1% of the etiology of the 22,000 newly diagnosed lymphoma cases in the U.S.A. every year is known. This disease has a significant prevalence and high mortality rate. Cell growth in lymphomas has been shown to be an important parameter in aggressive NHL when establishing prognosis, as well as an integral part in the pathophysiology of the disease process. While many aggressive B cell NHLs respond initially to chemotherapeutic regimens such as CHOP-bleo (adriamycin, vincristine and bleomycin) etc., relapse is common, and the patient is then often refractory to further salvage treatment regimens. To assess their potential to inhibit aggressive B cell NHLs and induce apoptosis (also referred to as programmed cell death (PCD)), it was proposed to utilize the following biological agents-liposomal all-trans retinoic acid (L-ATRA) which is a derivative of Vitamin A in liposomes and Vitamin D3. Preliminary evidence indicates that L-ATRA may inhibit cell growth in these cells and may induce PCD as well. Detailed studies were performed to understand the above phenomena by L-ATRA and Vitamin D3 in recently established NHL-B cell lines and primary cell cultures. The gene regulation involved in the case of L-ATRA was also delineated.
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