Please help me with a cytokind production question!

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waterangel
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Please help me with a cytokind production question!

Post by waterangel » Wed Aug 08, 2007 5:52 pm

My macrophage cells line (mouse J774) used to produce a high amout of TNF-alfa upon LPS stimulation (last Nov). But now their response is so weak (50 fold lower)! I even thawed the earliest stock I have yet it didn't change much. Does anyone know whether it's likely that cell lines could readily change their cytokine production? Anything I should pay particular attention when culturing them in order not to alter its immunopotency? I checked the cell morphology and they look normal, w/o apparent contamination.

Thank you a million for your kindest answer!!!

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