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IBD:全反式维甲酸可抵消肠道炎症中的腹泻并抑制腺瘤表达

2020-03-08 MedSci原创 MedSci原创

肠上皮中的Cl- / HCO 3 -交换泵——DRA已成为腹泻的一个重要的治疗靶点,全反式维甲酸(ATRA)是一种关键的维生素A代谢产物,之前曾证明它可以刺激DRA在肠上皮细胞中的表达。因此,本项研

背景及目的: 肠上皮中的Cl- / HCO 3 -交换泵——DRA已成为腹泻的一个重要的治疗靶点,全反式维甲酸(ATRA)是一种关键的维生素A代谢产物,之前曾证明它可以刺激DRA在肠上皮细胞中的表达。因此,本项研究旨在探究分析ATRA在体外和体内抵抗炎症引起的DRA降低的功效。

方法: 研究人员使用干扰素-γ(IFN-γ)处理的Caco-2细胞和葡聚糖硫酸钠(DSS)处理的C57BL / 6J小鼠分别作为肠道炎症的体外和体内模型,以了解ATRA对IFN-γ介导的DRA功能,表达和启动子活性抑制的影响。在DSS结肠炎模型中,测量了远端结肠的腹泻表型,细胞因子反应,体内成像,髓过氧化物酶活性和DRA表达。

结果:全反式维甲酸(10μM,24 h)消除了IFN-γ(30 ng / mL,24 h)诱导的Caco-2细胞DRA功能,表达和启动子活性的降低。全反式维甲酸通过阻断IFN-γ诱导的STAT-1酪氨酸磷酸化来改变IFN-γ信号传导。DSS治疗小鼠的全反式维甲酸联合治疗(每天1 mg / kg体重,腹腔注射)(3%的饮用水,连续7天)减轻了与结肠炎相关的体重减轻,腹泻表型以及诱导IL-1β和CXCL1和降低了结肠中DRA mRNA和蛋白质水平。

结论:在正常和炎症条件下,ATRA对DRA的上调证明了这种微量营养素在减轻IBD相关的腹泻中的作用。

原始出处:

Shubha Priyamvada. All-trans Retinoic Acid Counteracts Diarrhea and Inhibition of Downregulated in Adenoma Expression in Gut Inflammation. Inflammatory Bowel Diseases.2020.

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