Hypoxia-inducible APCDD1L-AS1 promotes osimertinib resistance by stabilising DLST to drive tricarboxylic acid cycle in lung adenocarcinoma.

IF 12.8 1区 医学 Q1 ONCOLOGY
Quanli Zhang, Ye Shen, Yuru Che, Lili Jia, Xiang Xiao, Hao Xu, Chi Su, Kemin Sun, Limin Zheng, Jiawen Xu, Jingwen Hu, Chaofeng Zhang, Dihan Zhu, Ming Li
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Abstract

Acquired resistance is unavoidable in lung adenocarcinoma (LUAD) treated with osimertinib, however, the underlying mechanisms remain largely unknown. Here, we report that the long non-coding RNA (lncRNA) APCDD1L-AS1 is upregulated in osimertinib-resistant LUAD tissues and cells and is associated with short survival of osimertinib-resistant LUAD patients. Our data showed that APCDD1L-AS1 upregulation is an independent risk factor for overall survival in patients with osimertinib-resistant LUAD. APCDD1L-AS1 knockdown enhanced osimertinib sensitivity both in vitro and in vivo, whereas APCDD1L-AS1 overexpression promoted osimertinib resistance. Mechanistically, APCDD1L-AS1 accelerates the tricarboxylic acid (TCA) cycle by forming complexes and maintaining the stability of dihydrolipoamide S-succinyltransferase (DLST), which inhibits the ubiquitination and degradation of DLST. Moreover, we demonstrate that hypoxia-inducible factor (HIF)-1α transcriptionally activates APCDD1L-AS1 by binding to the APCDD1L-AS1 promoter region under hypoxic conditions. Overall, our data confirm that APCDD1L-AS1 is upregulated by hypoxia-induced HIF-1α, which drives the TCA cycle by stabilising DLST to further promote osimertinib resistance in LUAD. Our findings provide new insights into the role of HIF-1α/APCDD1L-AS1/DLST axis-related reprogramming of hypoxia and the TCA balance in conferring osimertinib resistance in LUAD and confirm the therapeutic potential for targeting the APCDD1L-AS1.

缺氧诱导的APCDD1L-AS1通过稳定DLST驱动肺腺癌三羧酸循环促进奥希替尼耐药。
获得性耐药在奥西替尼治疗的肺腺癌(LUAD)中是不可避免的,然而,其潜在机制在很大程度上仍然未知。在这里,我们报道了长链非编码RNA (lncRNA) APCDD1L-AS1在奥西替尼耐药LUAD组织和细胞中上调,并与奥西替尼耐药LUAD患者的短生存期相关。我们的数据显示,APCDD1L-AS1上调是奥西替尼耐药LUAD患者总生存的独立危险因素。APCDD1L-AS1敲低增强了体外和体内对奥希替尼的敏感性,而APCDD1L-AS1过表达则促进了对奥希替尼的耐药性。机制上,APCDD1L-AS1通过形成配合物,维持二氢脂酰胺s -琥珀基转移酶(dihydrolipoamide S-succinyltransferase, DLST)的稳定性,从而加速三羧酸(TCA)循环,抑制DLST的泛素化和降解。此外,我们证明了缺氧诱导因子(HIF)-1α在缺氧条件下通过结合APCDD1L-AS1启动子区来转录激活APCDD1L-AS1。总之,我们的数据证实APCDD1L-AS1被缺氧诱导的HIF-1α上调,HIF-1α通过稳定DLST驱动TCA循环,进一步促进LUAD患者对奥西替尼的耐药性。我们的研究结果为HIF-1α/APCDD1L-AS1/DLST轴相关的缺氧重编程和TCA平衡在LUAD中赋予奥西替尼耐药的作用提供了新的见解,并证实了靶向APCDD1L-AS1的治疗潜力。
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来源期刊
CiteScore
18.20
自引率
1.80%
发文量
333
审稿时长
1 months
期刊介绍: The Journal of Experimental & Clinical Cancer Research is an esteemed peer-reviewed publication that focuses on cancer research, encompassing everything from fundamental discoveries to practical applications. We welcome submissions that showcase groundbreaking advancements in the field of cancer research, especially those that bridge the gap between laboratory findings and clinical implementation. Our goal is to foster a deeper understanding of cancer, improve prevention and detection strategies, facilitate accurate diagnosis, and enhance treatment options. We are particularly interested in manuscripts that shed light on the mechanisms behind the development and progression of cancer, including metastasis. Additionally, we encourage submissions that explore molecular alterations or biomarkers that can help predict the efficacy of different treatments or identify drug resistance. Translational research related to targeted therapies, personalized medicine, tumor immunotherapy, and innovative approaches applicable to clinical investigations are also of great interest to us. We provide a platform for the dissemination of large-scale molecular characterizations of human tumors and encourage researchers to share their insights, discoveries, and methodologies with the wider scientific community. By publishing high-quality research articles, reviews, and commentaries, the Journal of Experimental & Clinical Cancer Research strives to contribute to the continuous improvement of cancer care and make a meaningful impact on patients' lives.
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