m6A 介导的 7-去氢胆固醇还原酶刺激胆固醇合成和 cAMP 信号转导,促进膀胱癌转移。

IF 12.5 1区 医学 Q1 ONCOLOGY Cancer research Pub Date : 2024-10-15 DOI:10.1158/0008-5472.CAN-23-3703
Youmiao Zeng, Yongbo Luo, Keyuan Zhao, Sheng Liu, Kaiwen Wu, Yudong Wu, Kaixuan Du, Wenbang Pan, Yiheng Dai, Yuanhao Liu, Mengda Ren, Fengyan Tian, Lijie Zhou, Chaohui Gu
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引用次数: 0

摘要

胆固醇平衡失调发生在多种类型的肿瘤中,并促进癌症的进展。研究诱发胆固醇代谢异常的具体过程可以确定治疗靶点,从而改善癌症治疗。在这项研究中,我们观察到膀胱癌(BC)组织中参与胆固醇合成的重要酶--7-脱氢胆固醇还原酶(DHCR7)与正常组织相比出现上调,这与BC转移的增加有关。DHCR7在膀胱癌中的表达增加是由于YTHDF2介导的mRNA降解减少所致。缺失或抑制DHCR7可减少BC细胞的体外侵袭和体内转移。从机理上讲,DHCR7通过激活cAMP/PKA/FAK通路促进了BC的转移。具体来说,DHCR7通过提高脂质筏中的胆固醇含量来增加cAMP水平,从而促进由cAMP受体介导的信号通路的转导。DHCR7 还通过降低 7-DHC 的浓度和促进 G 蛋白偶联受体 GIPR 的转录来增强 cAMP 信号通路。总之,这些研究结果表明,DHCR7通过调节胆固醇合成和cAMP信号传导,在BC侵袭和转移中发挥着重要作用。此外,抑制DHCR7有望成为抑制BC侵袭和转移的一种可行的治疗策略。
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m6A-Mediated Induction of 7-Dehydrocholesterol Reductase Stimulates Cholesterol Synthesis and cAMP Signaling to Promote Bladder Cancer Metastasis.

Dysregulation of cholesterol homeostasis occurs in multiple types of tumors and promotes cancer progression. Investigating the specific processes that induce abnormal cholesterol metabolism could identify therapeutic targets to improve cancer treatment. In this investigation, we observed upregulation of 7-dehydrocholesterol reductase (DHCR7), a vital enzyme involved in the synthesis of cholesterol, within bladder cancer tissues in comparison to normal tissues, which was correlated with increased bladder cancer metastasis. Increased expression of DHCR7 in bladder cancer was attributed to decreased mRNA degradation mediated by YTHDF2. Loss or inhibition of DHCR7 reduced bladder cancer cell invasion in vitro and metastasis in vivo. Mechanistically, DHCR7 promoted bladder cancer metastasis by activating the cAMP/protein kinase A/FAK pathway. Specifically, DHCR7 increased cAMP levels by elevating cholesterol content in lipid rafts, thereby facilitating the transduction of signaling pathways mediated by cAMP receptors. DHCR7 additionally enhanced the cAMP signaling pathway by reducing the concentration of 7-dehydrocholesterol and promoting the transcription of the G protein-coupled receptor, namely gastric inhibitory polypeptide receptor. Overall, these findings demonstrate that DHCR7 plays an important role in bladder cancer invasion and metastasis by modulating cholesterol synthesis and cAMP signaling. Furthermore, inhibition of DHCR7 shows promise as a viable therapeutic strategy for suppressing bladder cancer invasion and metastasis. Significance: Inhibiting DHCR7 induces cholesterol metabolism reprogramming and lipid raft remodeling to inactivate the cAMP/protein kinase A/FAK axis and suppress bladder cancer metastasis, indicating the therapeutic potential of targeting DHCR7.

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来源期刊
Cancer research
Cancer research 医学-肿瘤学
CiteScore
16.10
自引率
0.90%
发文量
7677
审稿时长
2.5 months
期刊介绍: Cancer Research, published by the American Association for Cancer Research (AACR), is a journal that focuses on impactful original studies, reviews, and opinion pieces relevant to the broad cancer research community. Manuscripts that present conceptual or technological advances leading to insights into cancer biology are particularly sought after. The journal also places emphasis on convergence science, which involves bridging multiple distinct areas of cancer research. With primary subsections including Cancer Biology, Cancer Immunology, Cancer Metabolism and Molecular Mechanisms, Translational Cancer Biology, Cancer Landscapes, and Convergence Science, Cancer Research has a comprehensive scope. It is published twice a month and has one volume per year, with a print ISSN of 0008-5472 and an online ISSN of 1538-7445. Cancer Research is abstracted and/or indexed in various databases and platforms, including BIOSIS Previews (R) Database, MEDLINE, Current Contents/Life Sciences, Current Contents/Clinical Medicine, Science Citation Index, Scopus, and Web of Science.
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