Hegde Mangala, Daimary Uzini Devi, Jose Sandra, Sajeev Anjana, Chinnathambi Arunachalam, Alharbi Sulaiman Ali, Shakibaei Mehdi, Kunnumakkara Ajaikumar B
Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology-Guwahati, Guwahati, India.
DBT-AIST International Center for Translational and Environmental Research, Indian Institute of Technology-Guwahati, Guwahati, India.
Front Genet. 2022 May 31;13:866473. doi: 10.3389/fgene.2022.866473. eCollection 2022.
Regulation of intracellular concentration of calcium levels is crucial for cell signaling, homeostasis, and in the pathology of diseases including cancer. Agonist-induced entry of calcium ions into the non-excitable cells is mediated by store-operated calcium channels (SOCs). This pathway is activated by the release of calcium ions from the endoplasmic reticulum and further regulated by the calcium uptake through mitochondria leading to calcium-dependent inactivation of calcium-release activated calcium channels (CARC). SOCs including stromal interaction molecules (STIM) and ORAI proteins have been implicated in tumor growth, progression, and metastasis. In the present study, we analyzed the mRNA and protein expression of genes mediating SOCs-STIM1, STIM2, ORAI1, ORAI2, ORAI3, TRPC1, TRPC3, TRPC4, TRPC5, TRPC6, TRPC7, TRPV1, TRPV2, TRPM1, and TRPM7 in head and neck squamous cell cancer (HNSC) patients using TCGA and CPTAC analysis. Further, our analysis showed a significant correlation between the expression of SOCs and genes involved in the mitochondrial dynamics (MDGs) both at mRNA and protein levels. Protein-protein docking results showed lower binding energy for SOCs with MDGs. Subsequently, we validated these results using gene expression and single-cell RNA sequencing datasets retrieved from Gene Expression Omnibus (GEO). Single-cell gene expression analysis of HNSC tumor tissues revealed that SOCs expression is remarkably associated with the MDGs expression in both cancer and fibroblast cells.
细胞内钙离子浓度的调节对于细胞信号传导、内环境稳态以及包括癌症在内的多种疾病的病理过程至关重要。激动剂诱导的钙离子进入非兴奋性细胞是由储存-操纵性钙通道(SOCs)介导的。该途径由内质网释放钙离子激活,并通过线粒体的钙摄取进一步调节,导致钙释放激活钙通道(CARC)的钙依赖性失活。包括基质相互作用分子(STIM)和ORAI蛋白在内的SOCs与肿瘤生长、进展和转移有关。在本研究中,我们使用TCGA和CPTAC分析,分析了头颈部鳞状细胞癌(HNSC)患者中介导SOCs的基因——STIM1、STIM2、ORAI1、ORAI2、ORAI3、TRPC1、TRPC3、TRPC4、TRPC5、TRPC6、TRPC7、TRPV1、TRPV2、TRPM1和TRPM7的mRNA和蛋白表达。此外,我们的分析表明,SOCs的表达与线粒体动力学相关基因(MDGs)在mRNA和蛋白水平上均存在显著相关性。蛋白质-蛋白质对接结果显示,SOCs与MDGs的结合能较低。随后,我们使用从基因表达综合数据库(GEO)检索到的基因表达和单细胞RNA测序数据集验证了这些结果。HNSC肿瘤组织的单细胞基因表达分析显示,SOCs的表达在癌细胞和成纤维细胞中均与MDGs的表达显著相关。