Contribution of organic cation transporter 2 (OCT2) to cisplatin-induced nephrotoxicity.

Contribution of organic cation transporter 2 (OCT2) to cisplatin-induced nephrotoxicity.
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DOI:
10.1038/clpt.2009.139
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发表时间:
2009-10
影响因子:
6.7
通讯作者:
--
中科院分区:
医学2区
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--
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顺铂是治疗实体瘤最广泛使用的抗癌药物之一。顺铂的临床使用与剂量限制性肾毒性有关,尽管采取了强化预防措施,仍有三分之一的患者出现这种情况。有机阳离子转运蛋白 2 (OCT2) 与顺铂的细胞摄取有关,但其在顺铂诱导的肾毒性中的作用仍不清楚。在小鼠中,Oct1 和 Oct2 的缺失导致顺铂的尿排泄显着受损,但对血浆水平没有明显影响。此外,Oct1/Oct2 缺陷小鼠免受顺铂引起的严重肾小管损伤。随后,我们发现 OCT2 基因 SLC22A2 (rs316019) 中的非同义单核苷酸多态性与顺铂诱导的患者肾毒性降低相关。总的来说,这些结果表明 OCT2 在顺铂的肾脏处理和随后的肾毒性中至关重要,并为开发新的靶向方法来减轻这种使人衰弱的副作用提供了理论依据。
Cisplatin is one of the most widely used anticancer agents for the treatment of solid tumors. The clinical use of cisplatin is associated with dose-limiting nephrotoxicity, which occurs in one-third of patients despite intensive prophylactic measures. Organic cation transporter 2 (OCT2) has been implicated in the cellular uptake of cisplatin, but its role in cisplatin-induced nephrotoxicity remains unknown. In mice, deletion of Oct1 and Oct2 resulted in significantly impaired urinary excretion of cisplatin without an apparent influence on plasma levels. Furthermore, the Oct1/Oct2-deficient mice were protected from severe cisplatin-induced renal tubular damage. Subsequently, we found that a non-synonymous single-nucleotide polymorphism in the OCT2 gene SLC22A2 (rs316019) was associated with reduced cisplatin-induced nephrotoxicity in patients. Collectively, these results indicate the critical importance of OCT2 in the renal handling and subsequent renal toxicity of cisplatin, and provide a rationale for the development of new targeted approaches to mitigate this debilitating side effect.
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