Production of B cell differentiation factors by mouse parenchymal liver cells
1997
: Previously we reported that most antibody secreting cells secreted IgA in the liver. Here we assessed the possibility that parenchymal liver cells (PLC) produced factors, transforming growth factor (TGF)-beta and IL-5, which participate in the differentiation of B cells to IgA-secreting cells. We showed that TGF-beta activity was present in the culture supernatant of PLC, and IL-5 activity was in the lysate of PLC. Moreover, it was confirmed that IL-5 protein produced by PLC was mainly localized in the cell membrane by histochemical staining. The findings that both TGF-beta and IL-5 were produced by PLC should provide useful information concerning the fact that IgA-secreting cells were dominant in the liver.
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