Stimulation of rat hepatocyte fibronectin production by monocyte-conditioned medium is due to interleukin 6.

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Stimulation of rat hepatocyte fibronectin production by monocyte- conditioned medium is due to interleukin 6

In this report, conditioned media from LPS-stimulated monocytes increased rat hepatocyte production of fibronectin (Fn) in a dose-dependent manner. Preincubation of the conditioned media with anti-IL-6, but not with anti-IL-1 alpha, anti-IL-1 beta, or anti-TNF, completely neutralized the Fn-stimulating activity. 10-100 pg/ml of rIL-6 was sufficient to increase Fn production. Neither IL-1 nor TN...

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Generation of Mature Monocyte-Derived Dendritic Cells in the Presence of Heparin and Monocyte Conditioned Medium: Phenotypic and Functional Comparison

Background: Dendritic cells (DC) induce tumor or pathogen-specific T cell responses in humans. Several laboratories have developed culture systems, including maturation factors for human DC from peripheral blood monocytes. We comprehensively compared standard maturation stimulus, an autologous monocyte-conditioned medium (MCM), with heparin for their ability to promote uniformly mature DC that ...

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Stimulation of interleukin-6 production by endothelin in rat bone marrow-derived stromal cells.

Endothelin (ET) produced by endothelial cells has recently been found to be a potent vasoconstricting hormone. In this report, ET is shown to be a potent stimulator of interleukin-6 (IL-6) production by rat bone marrow (BM)-derived stromal cells. It was also shown that ET increased the level of mRNA for IL-6 in these cells. The two types of ET receptor (R), ETAR and ETBR, were shown to be expre...

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Effects of retinol and hepatocyte-conditioned medium on cultured rat hepatic stellate cells.

Hepatic stellate cells (HSC) become activated in liver injury, proliferating and secreting components of connective tissue. Activated HSC lose their native retinol and fat storing capacity. Signals from hepatocytes and/or Kupffer cells injured (eg, by iron overload) may contribute to the so-called activated HSC phenotype. Primary rat HSC cultures were treated with retinol to determine if this c...

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Dual effect of monocyte-conditioned medium on in vitro hematopoiesis.

To investigate the effects of the conditioned medium on regulation of hematopoietic stem cells, serial volumes of monocyte-conditioned medium were added to the culture systems of CFUE and CFUC. Small volumes of the conditioned medium possessed stimulatory activity and large volumes inhibitory activity for both CFUE and CFUC. These findings suggest that the monocyte-conditioned medium regulates ...

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ژورنال

عنوان ژورنال: Journal of Experimental Medicine

سال: 1989

ISSN: 0022-1007,1540-9538

DOI: 10.1084/jem.170.5.1781