Nat Commun:STING通过免疫和神经元调节抑制骨癌疼痛

2021-08-07 xiaozeng MedSci原创

晚期肺癌、乳腺癌、甲状腺癌和膀胱癌患者在出现疾病骨转移后常会出现癌疼痛,并伴有溶骨性病变和剧烈疼痛。

晚期肺癌、乳腺癌、甲状腺癌和膀胱癌患者在出现疾病骨转移后常会出现癌疼痛,并伴有溶骨性病变和剧烈疼痛。既往研究显示,约75%的晚期癌症患者会经历中度或重度疼痛,且对于超过半数的转移性癌痛患者而言,目前可用的药物疗法无法充分缓解患者的疼痛。

转移性癌症患者的疼痛控制不足往往会伴随着抑郁、焦虑、功能受损和生活质量的显著降低,最终导致发病率和死亡率的升高。因此,迫切需要开发新型的疗法,为癌症患者提供姑息治疗以缓解疼痛并提高生活质量。

STING或干扰素(IFN)基因刺激因子是一种细胞内DNA传感器,其在先天免疫中发挥着关键的作用,通过诱导I型IFN(IFN-I),包括IFN-α和IFN-β,促进病原体和受损宿主细胞的清除。


STING通路的激活还可以有效增强抗肿瘤免疫,最近的研究表明,STING激动剂可有效控制病理性疼痛动物的伤害感受。然而,目前尚不清楚STING激动剂能否有效治疗骨癌。

STING激动剂可减弱癌症引起的骨骼破坏

在该研究中,研究人员通过研究多种骨癌小鼠模型,发现STING激动剂对癌症疼痛、骨骼破坏和局部肿瘤负担具有显著的保护作用。反复的STING激动剂全身给药可有效的减轻骨癌引起的疼痛并改善运动功能。


有趣的是,STING激动剂是通过直接的神经元调节来缓解急性疼痛。此外,STING激动剂可通过调节肿瘤微环境中破骨细胞和免疫细胞的功能来防止局部骨破坏并减少局部肿瘤负荷,从而长期缓解癌症疼痛。进一步的研究显示,这些体内效应主要取决于宿主内在的STING和IFN-I信号。

相关机制示意图

总而言之,该研究结果揭示,STING的激活可通过对伤害感受器、免疫细胞和破骨细胞的独特协同作用,以调控骨癌的疼痛。


原始出处:

Wang, K., Donnelly, C.R., Jiang, C. et al. STING suppresses bone cancer pain via immune and neuronal modulation. Nat Commun 12, 4558 (27 July 2021).

 

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    2022-06-02 liye789132251
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    2022-07-01 liuli5079
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    2021-08-09 lxg955
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    2021-08-08 jyq1990

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