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Identification of macrophage migration inhibitory factor in human leukemia HL‐60 cells and its induction by lipopolysaccharide
Author(s) -
Nishihira Jun,
Koyama Yoshikazu,
Mizue Yuka
Publication year - 1996
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1080/15216549600201473
Subject(s) - macrophage migration inhibitory factor , lipopolysaccharide , western blot , microbiology and biotechnology , leukemia inhibitory factor , cytokine , leukemia , inflammation , biology , immunohistochemistry , reverse transcription polymerase chain reaction , northern blot , chemistry , messenger rna , interleukin 6 , immunology , gene , biochemistry
Cytokines play an important role in inflammation and immunity. In this study, we examined the expression and presence of human macrophage migration inhibitory factor (MIF) in human myelomonocytic leukemia cell line, HL‐60 by reverse transcription‐polymerase chain reaction (RT‐PCR) and immunological methods (Western blot analysis and immunohistochemistry), respectively. The RT‐PCR showed that MIF mRNA was constitutively expressed, and the expression was further induced by lipopolysaccharide (LPS) stimulation. The expression was up‐regulated by LPS at the range of 10 pg/ml to 10 ng/ml; however, it decreased at doses higher than 100 ng/ml. The expression reached the maximum 12 hr after the stimulation, but substantially decreased by 24 hr. Western blot analysis and immunohistochemistry using an anti‐human MIF antibody revealed the presence of MIF protein in cytoplasm of the cells. The pathophysiological role of MIF in HL‐60 cells has not been fully understood; however, the regulation of MIF mRNA expression by LPS suggests the possibility that the cytokine plays an important role in inflammatory events of leukemia.