Retinyl esters in chylomicron remnants inhibit growth of myeloid and lymphoid leukaemic cells. Skrede B, Blomhoff HK, Smeland EB, Wathne KO, Norum KR, Blomhoff R. Institute for Nutrition Research, School of Medicine, University of Oslo, Blindern, Norway. We have studied the effects of retinyl esters in chylomicron remnants on cell growth and differentiation of myeloid and lymphoid leukaemic cells. Ten mumol l-1 retinyl ester in chylomicron remnants effectively reduced proliferation of the myeloid leukaemic cell lines HL60, U937 and KG-1, and induced differentiation of 68% and 53% of the HL60 and U937 cells, respectively, in 5 days. While no effect on cell growth of the lymphoid cell lines Daudi, Raji and SOS was observed, 10 mumol 1-1 retinyl esters in chylomicron remnants reduced the growth of the B lymphoid cell line Reh by more than 50%. Primary cell cultures from six patients with acute leukaemia (four non-lymphocytic and two lymphocytic) were incubated with chylomicron remnant retinyl esters and proliferation was measured by means of thymidine incorporation. Among the myeloid leukaemic cells, the monomyelocytic, the two promyelocytic and the monoblastic leukaemic cells were growth inhibited. Chylomicron remnants had no effect on the growth of the c-ALL primary culture, but reduced proliferation of the T-ALL primary culture by approximately 20% after 48 h. These data suggest that high doses of retinol may be used in the treatment of some forms of acute leukaemia. Eur J Clin Invest. 1991 Dec;21(6):574-9. Remember we are NOT Doctors and have NO medical training. This site is like an Encylopedia - there are many pages, many links on many topics. Support our work with any size DONATION - see left side of any page - for how to donate. You can help raise awareness of CAM.