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Leukotriene C < sub > 4 < /sub > synthase is a novel PPAR γ target gene, and leukotriene C < sub > 4 < /sub > and D < sub > 4 < /sub > activate adipogenesis through cysteinyl LT1 receptors in adipocytes
In this study, we investigated the expression of LTC4S and production of CysLTs in murine adipocyte 3T3-L1 cells and their underlying regulatory mechanisms. Expression of LTC4S and production of LTC4 and CysLTs increased during adipogenesis, whereas siRNA-mediated suppression of LTC4S expression repressed adipogenesis by reducing adipogenic gene expression. The CysLT1 receptor, one of the two LTC4 receptors, was expressed in adipocytes. LTC4 and LTD4 increased the intracellular triglyceride levels and adipogenic gene expression, and their enhancement was suppressed by co-treatment with pranlukast, a CysLT1 receptor antagon...
Source: Biochimica et Biophysica Acta - December 30, 2021 Category: Biochemistry Authors: Ko Fujimori Saki Uno Kyohei Kuroda Chihiro Matsumoto Toko Maehara Source Type: research

TSLP-induced collagen type-I synthesis through STAT3 and PRMT1 is sensitive to calcitriol in human lung fibroblasts
This study assessed the effect of calcitriol on PRMT1-dependent fibroblast remodeling in human lung fibroblasts, and allergen-induced asthma in E3-rats. Fibroblasts were activated with thymic stromal lymphopoietin (TLSP); asthma was induced by ovalbumin inhalation in rats. The airway structure was assessed by immunohistology. Protein expression in fibroblasts and activation of the mitogen activated protein kinases were detected by Western-blotting. Transcription factor activation was determined by luciferase reporter assay. PRMT1 action was blocked by siRNA and PRMT-inhibition. Ovalbumin upregulated the expression of TSLP,...
Source: Biochimica et Biophysica Acta - June 20, 2021 Category: Biochemistry Authors: Ai Jin Xuemei Tang Weiqi Zhai Yuwen Li Qingzhu Sun Li Liu Xiaojun Yang Hui Ren Shemin Lu Source Type: research