Abstract
In the present study, effects of TGF-β1 on IL-1β signaling during inflammatory response were examined in grass carp. In grass carp head kidney leukocytes (HKLs), LPS significantly induced the mRNA expression of grass carp TGF-β1 (gcTGF-β1) and IL-1β, indicating the involvement of TGF-β1 and IL-1β in inflammatory process. Using anti-IL-1β antibody to neutralize the endogenous IL-1β, we found that stimulation of IL-1β mRNA expression by LPS was independent on IL-1β itself. Interestingly, recombinant gcTGF-β1 (rgcTGF-β1) suppressed basal and LPS-stimulated IL-1β mRNA expression in spite of immunoneutralizing endogenous IL-1β or not. Given that IL-1β receptor signaling molecule and natural IL-1β inhibitors are the important regulators in IL-1β signaling and activity, the effect of LPS on these molecules' expression was determined in HKLs. Results showed that LPS significantly enhanced the mRNA levels of IL-1 receptor type I (IL-1RI) and II (IL-1RII), IL-1R accessory protein (IL-1Racp) and novel IL-1 family member (nIL-1F). Moreover, the induction of IL-1RII, IL-1Racp and nIL-1F by LPS was IL-1β-dependent since IL-1β immunoneutralization abolished these inductions, implying the involvement of IL-1β auto-induction in these effects. C...Continue Reading
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May 11, 2016·Fish & Shellfish Immunology·Qing Chu, Tianjun Xu
Jan 11, 2018·Artificial Cells, Nanomedicine, and Biotechnology·Shiyu ZongBing Wang
May 13, 2021·Developmental and Comparative Immunology·Wenjing DongTianjun Xu