Effect of lipopolysaccharide on mouse mast cell induction by a splenic cell culture system.
We have previously reported a method of mast cell induction by long-term culture of mouse spleen cells without using exogenous mast cell growth factor (Z.-Q. Hu, T. Yoshida, and T. Shimamura, J. Immunol. Methods 149:173, 1992). Supernatants recovered from the long-term cultures contain endogenous interleukin 3 and soluble stem cell factor. These were assessed by the capacity of the recovered supernatants to foster the growth of a mast cell growth factor-dependent cell line and by neutralizing antibodies. Besides the soluble factors, cell-to-cell contacts mediated by membrane stem cell factor on splenic stromal cells and c-Kit receptors on mast cells also affect mast cell induction. Different lots of fetal calf serum (FCS) were examined to determine a possible trigger for cytokine production. FCS can be divided into mast cell-inducible and noninducible sera by this process. However, not all FCS lots contain mast cell growth factor. The mast cell-inducible lots contain lipopolysaccharide (LPS) confirmed by a Limulus assay. Polymyxin B can neutralize the mast cell induction activity. Non-mast cell-inducible FCS can be converted to inducible FCS by adding exogenous LPS. The results indicate that LPS as a trigger of cytokine production is responsible for mast cell induction.
Hu
Z Q
ZQ
Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, Japan.
Asano
K
K
Yamazaki
T
T
Shimamura
T
T
D000818:Animals; D002417:Cattle; D002455:Cell Division; D002478:Cells, Cultured; D005312:Fetal Blood / Q000502:physiology; D016298:Hematopoietic Cell Growth Factors / Q000502:physiology; D007377:Interleukin-3 / Q000502:physiology; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008297:Male; D008407:Mast Cells / Q000187:drug effects* / Q000502:physiology; D051379:Mice; D008809:Mice, Inbred C3H; D011112:Polymyxin B / Q000494:pharmacology; D019089:Stem Cell Factor
D016298:Hematopoietic Cell Growth Factors; D007377:Interleukin-3; D008070:Lipopolysaccharides; D019089:Stem Cell Factor; D011112:Polymyxin B