CCFM8610 缓解镉诱导的小鼠肠道运动障碍。
Relief of Cadmium-Induced Intestinal Motility Disorder in Mice by CCFM8610.
机构信息
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.
School of Food Science and Technology, Jiangnan University, Wuxi, China.
出版信息
Front Immunol. 2020 Dec 10;11:619574. doi: 10.3389/fimmu.2020.619574. eCollection 2020.
Cadmium (Cd) is a toxic metal inducing a range of adverse effects on organs including liver and kidneys. However, the underlying molecular mechanisms of Cd-induced intestinal toxicity through dietary intake is poorly studied. This study evaluated the toxic effects of Cd on intestinal physiology and confirmed the effectiveness of the protective mechanism of the probiotic CCFM8610 against chronic Cd toxicity. After treatment with Cd, the HT-29 cell line was subjected to iTRAQ analysis, which revealed that changes in the proteomic profiles after Cd exposure were related to pathways involved in the stress response and carbohydrate metabolism. The results of an animal trial also indicated that 10 weeks of Cd exposure decreased the fecal water content and contractile response of colonic muscle strips in mice, and delayed the excretion time of the first black feces. CCFM8610 treatment provided protective effects against these Cd-induced intestinal motility dysfunctions by recovering the levels of neurotransmitters, including substance P, acetyl cholinesterase, vasoactive intestinal peptide, 5-hydroxytryptamine, calcitonin gene-related peptide, and nitric oxide, and suppressing the cellular stress response in mice (e.g., the inhibition of mitogen-activated protein kinase pathways). The administration of this probiotic was also observed to reduce Cd levels in the tissues and blood of the mice. Our results suggest a newly identified protective mechanism of probiotics against Cd toxicity that involves the recovery of intestinal motility and increase in fecal cadmium excretion.
镉(Cd)是一种有毒金属,会对包括肝脏和肾脏在内的器官产生一系列不良影响。然而,通过饮食摄入导致肠道毒性的镉的潜在分子机制研究甚少。本研究评估了 Cd 对肠道生理学的毒性作用,并证实了益生菌 CCFM8610 对慢性 Cd 毒性的保护机制的有效性。用 Cd 处理 HT-29 细胞系后,进行 iTRAQ 分析,结果表明 Cd 暴露后蛋白质组图谱的变化与涉及应激反应和碳水化合物代谢途径的变化有关。动物试验的结果也表明,10 周的 Cd 暴露降低了小鼠粪便的含水量和结肠肌条的收缩反应,并延迟了第一块黑便的排出时间。CCFM8610 处理通过恢复包括 P 物质、乙酰胆碱酯酶、血管活性肠肽、5-羟色胺、降钙素基因相关肽和一氧化氮在内的神经递质水平,并抑制小鼠的细胞应激反应(例如,抑制丝裂原活化蛋白激酶途径),对这些 Cd 引起的肠道运动功能障碍提供了保护作用。还观察到该益生菌的给药可降低小鼠组织和血液中的 Cd 水平。我们的研究结果表明,益生菌对 Cd 毒性具有新发现的保护机制,包括恢复肠道运动和增加粪便中 Cd 的排泄。