C-176(AbMole,M9893)是一種具血腦屏障滲透性的STING抑制劑,能夠選擇性抑制STING通路的激活,從而發(fā)揮廣泛的抗炎作用[1]。C-176可通過抑制STING信號傳導(dǎo),減少下游炎癥因子(如IL-1β、iNOS、IL-6、TNF-α、MCP-1和NLRP3炎癥小體)的產(chǎn)生,并調(diào)控免疫細(xì)胞極化[2]。在細(xì)胞模型中,C-176(CAS No.:314054-00-7)顯著抑制了脂多糖(LPS)誘導(dǎo)的M1型巨噬細(xì)胞極化(如小鼠BV2小膠質(zhì)細(xì)胞系和GMI-R1小膠質(zhì)細(xì)胞),同時促進(jìn)M2型極化,降低促炎因子的蛋白水平和基因表達(dá)水平[3]。此外,在破骨細(xì)胞前體細(xì)胞中,C-176通過抑制STING激活,阻斷了核因子κB受體激活劑配體(RANKL)誘導(dǎo)的破骨細(xì)胞分化[4]。在動物實(shí)驗(yàn)中,C-176的應(yīng)用效果在多類小鼠模型中得到了驗(yàn)證。例如,C-176(15-30 mg/kg,腹腔注射)在LPS(Lipopolysaccharides誘導(dǎo)的急性肺損傷(ALI)模型中,劑量依賴性地抑制肺組織中STING表達(dá),減少炎癥介質(zhì)釋放,并改善肺損傷[5]。
在缺血再灌注損傷模型中,C-176通過激活A(yù)MPK信號通路減輕組織損傷[6]。此外,C-176在Streptozotocin(鏈脲佐菌素,STZ)誘導(dǎo)的糖尿病小鼠中,通過抑制STING-TBK1-NF-κB軸,改善了血管內(nèi)皮功能障礙[7]。C-176不僅能在創(chuàng)傷性腦損傷(TBI)模型(C57BL/6雄性小鼠)中縮小皮質(zhì)損傷面積[8],還能在小鼠銀屑病樣炎癥模型(由Imiquimod誘導(dǎo))中,通過抑制樹突狀細(xì)胞活化,減少IL-17和IFN-γ分泌性T細(xì)胞的增殖,從而減輕皮膚炎癥。綜上,C-176作為一種高效的STING抑制劑,在多種疾病模型中展現(xiàn)出核心調(diào)控作用,其機(jī)制涵蓋AMPK激活、巨噬細(xì)胞極化調(diào)節(jié)及炎癥小體抑制等。
范例詳解
ACS Nano. 2025 Jan 21;19(2):2726-2741.
四川大學(xué)的科研團(tuán)隊(duì)在上述文獻(xiàn)中使用了AbMole的
C-176(AbMole,M9893),實(shí)驗(yàn)人員開發(fā)了具有pH/氧化還原雙重響應(yīng)特性的鉑(IV)骨架聚合物前藥功能化氧化錳納米顆粒(DHP/MnO2NP)。體外實(shí)驗(yàn)表明,該納米顆粒能有效誘導(dǎo)腫瘤細(xì)胞DNA損傷并促使其泄漏到細(xì)胞質(zhì)中,與Mn2+協(xié)同促進(jìn)STING激活,顯著上調(diào)促炎細(xì)胞因子表達(dá)。體內(nèi)實(shí)驗(yàn)中,DHP/MnO2NP通過誘導(dǎo)STING激活和啟動強(qiáng)大的抗腫瘤免疫,展現(xiàn)出對腫瘤的抑制效果,能將腫瘤相關(guān)巨噬細(xì)胞向促炎表型傾斜,使腫瘤中促炎細(xì)胞因子表達(dá)上調(diào)高達(dá)99倍,同時顯著增加CD8+ T細(xì)胞浸潤。C-176作為STING抑制劑,可抑制DHP/MnO2NP的抗腫瘤和免疫刺激功效,用于驗(yàn)證納米粒子對STING通路的激活和作用機(jī)理。
Therapeutic efficacy of DHP/MnO2NP after intravenous administration
參考文獻(xiàn)及鳴謝
[1] Yu, Z. C.; Fu, R.; Li, Y.; et al. The STING inhibitor C-176 attenuates osteoclast-related osteolytic diseases by inhibiting osteoclast differentiation.
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[2] Hu, S.; Gao, Y.; Gao, R.; et al. The selective STING inhibitor H-151 preserves myocardial function and ameliorates cardiac fibrosis in murine myocardial infarction.
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[3] Zhang, X.; Li, X.; Wang, W.; et al. STING Contributes to Cancer-Induced Bone Pain by Promoting M1 Polarization of Microglia in the Medial Prefrontal Cortex.
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[4] Mao, H. Q.; Zhou, L.; Li, J. Q.; et al. STING inhibition alleviates bone resorption in apical periodontitis.
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[5] Wu, B.; Xu, M. M.; Fan, C.; et al. STING inhibitor ameliorates LPS-induced ALI by preventing vascular endothelial cells-mediated immune cells chemotaxis and adhesion.
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[6] Yang, M.; Ma, Y. X.; Zhi, Y.; et al. Inhibitors of IFN gene stimulators (STING) improve intestinal ischemia-reperfusion-induced acute lung injury by activating AMPK signaling.
European journal of medical research 2022,
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[7] Pham, P. T.; Bavuu, O.; Kim-Kaneyama, J. R.; et al. Innate Immune System Regulated by Stimulator of Interferon Genes, a Cytosolic DNA Sensor, Regulates Endothelial Function.
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[8] Fryer, A. L.; Abdullah, A.; Mobilio, F.; et al. Pharmacological inhibition of STING reduces neuroinflammation-mediated damage post-traumatic brain injury.
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