Genetic and pharmacologic inhibition of the Ca2+ influx channel TRPC3 protects secretory epithelia from Ca2+-dependent toxicity.

Genetic and pharmacologic inhibition of the Ca2+ influx channel TRPC3 protects secretory epithelia from Ca2+-dependent toxicity.
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DOI:
10.1053/j.gastro.2011.02.052
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发表时间:
2011-06
期刊:
影响因子:
29.4
通讯作者:
Muallem S
Muallem S
中科院分区:
医学1区
文献类型:
--
作者:
Kim MS;Lee KP;Yang D;Shin DM;Abramowitz J;Kiyonaka S;Birnbaumer L;Mori Y;Muallem S

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过多的 Ca2+ 流入会介导许多细胞毒性过程,包括与急性胰腺炎和干燥综合征等自身免疫性炎症性疾病相关的过程。 TRPC3 是胰腺和唾液腺细胞中主要的 Ca2+ 流入通道。我们研究了 TRPC3 的遗传或药理学抑制是否可以保护胰腺和唾液腺免受 Ca2+ 依赖性损伤。我们开发了一种 Ca2+ 依赖性唾液腺腺泡细胞损伤模型。通过向野生型和Trpc3−/−小鼠注射雨蛙素诱导急性胰腺炎。小鼠还接受了 Trpc3 选择性抑制剂吡唑 3 (Pyr3)。 Trpc3−/− 小鼠的唾液腺和胰腺受到保护,免受 Ca2+ 介导的细胞毒性。对野生型和 Trpc3−/− 腺泡中 Ca2+ 信号传导的分析表明,Pyr3 是 Tprc3 的高度特异性抑制剂;它通过抑制 Trpc3 介导的 Ca2+ 流入成分,保护唾液腺和胰腺细胞免受 Ca2+ 介导的毒性。 TRPC3 介导的 Ca2+ 内流介导对胰腺和唾液腺的损伤。高选择性 TRPC3 抑制剂 Pyr3 对 TRPC3 的药理学抑制可能被开发用于治疗急性胰腺炎和干燥综合征患者。
Excessive Ca2+ influx mediates many cytotoxic processes, including those associated with autoimmune inflammatory diseases such as acute pancreatitis and Sjögren's syndrome. TRPC3 is a major Ca2+ influx channel in pancreatic and salivary gland cells. We investigated whether genetic or pharmacological inhibition of TRPC3 protects pancreas and salivary glands from Ca2+-dependent damage. We developed a Ca2+-dependent model of cell damage for salivary gland acini. Acute pancreatitis was induced by injection of cerulein into wild-type and Trpc3−/− mice. Mice were also given the Trpc3-selective inhibitor pyrazole 3 (Pyr3). Salivary glands and pancreas of Trpc3−/− mice were protected from Ca2+-mediated cell toxicity. Analysis of Ca2+ signaling in wild-type and Trpc3−/− acini showed that Pyr3 is highly specific inhibitor of Tprc3; it protected salivary glands and pancreas cells from Ca2+-mediated toxicity by inhibiting the Trpc3-mediated component of Ca2+ influx. TRPC3-mediated Ca2+ influx mediates damage to pancreas and salivary glands. Pharmacological inhibition of TRPC3 with the highly selective TRPC3 inhibitor Pyr3 might be developed for treatment of patients with acute pancreatitis and Sjögren's syndrome.
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