"Differentiation Induction" culture of human leukemic myeloid cells stimulates high production of macrophage differentiation inducing factor.

Cytotechnology
T AbeR Kodaira

Abstract

A suitable procedure for the production of human monokines was defined as 'differentiation-induction' culture. Human monocytic leukemia THP-1 cells were well-differentiated from nonfunctional promonocytes into macrophage-like cells by the induction with a combination of mezerein, retinoic acid, and aMycoplasma fermentans extract. The differentiated THP-1 cells secreted a high amount of macrophage differentiation-inducing factor (DIF) activity and concomitantly produced other known monokines, such as tumor necrosis factor-α (TNF-α), interleukin-1α (IL-1α) and interleukin-1β (IL-1β), into the medium. These results suggest that other novel human monokines may also be found in the conditioned medium of THP-1 cells induced by the 'differentiation-induction' culture conditions defined in this study. Macrophage DIF was purified to homogeneity and NH(2)-terminal amino acid sequence analysis revealed that macrophage DIF is very similar or identical to human leukemia inhibitory factor (LIF). The cDNA encoding human LIF was isolated using the polymerase chain reaction, and a clone producing 3.7 μg/10(6) cells day recombinant LIF was selected from Chinese hamster ovary (CHO) cells which were transfected with the LIF cDNA. The recombinant L...Continue Reading

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Citations

Jul 1, 2014·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Cong WangKui Wang
Jun 11, 2008·Laboratory Investigation; a Journal of Technical Methods and Pathology·Patrick DumontIsabelle Salmon
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