TNF and infection: Interestingly, M1-linked Cebpa expression was not affected by 4T1 cell CM or infection, while 4T1 cells upregulated M1-linked Cepbd. Infection with SFV/TNFα increased Cepbd levels, but infection with SFV/IFNγ reduced expression compared to the SFV/Luc (SFV) group.