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Metastatic suppression by DOC2B is mediated by inhibition of epithelial-mesenchymal transition and induction of senescence
Cell Biology and Toxicology ( IF 6.1 ) Pub Date : 2021-03-24 , DOI: 10.1007/s10565-021-09598-w
Samatha Bhat 1 , Divya Adiga 1 , Vaibhav Shukla 1 , Kanive Parashiva Guruprasad 2 , Shama Prasada Kabekkodu 1 , Kapaettu Satyamoorthy 1
Affiliation  

Senescence induction and epithelial-mesenchymal transition (EMT) events are the opposite sides of the spectrum of cancer phenotypes. The key molecules involved in these processes may get influenced or altered by genetic and epigenetic changes during tumor progression. Double C2-like domain beta (DOC2B), an intracellular vesicle trafficking protein of the double C2 protein family, plays a critical role in exocytosis, neurotransmitter release, and intracellular vesicle trafficking. DOC2B is repressed by DNA promoter hypermethylation and functions as a tumor growth regulator in cervical cancer. To date, the molecular mechanisms of DOC2B in cervical cancer progression and metastasis is elusive. Herein, the biological functions and molecular mechanisms regulated by DOC2B and its impact on senescence and EMT are described. DOC2B inhibition promotes proliferation, growth, and migration by relieving G0/G1-S arrest, actin remodeling, and anoikis resistance in Cal27 cells. It enhanced tumor growth and liver metastasis in nude mice with the concomitant increase in metastasis-associated CD55 and CD61 expression. Inhibition of EMT and promotion of senescence by DOC2B is a calcium-dependent process and accompanied by calcium-mediated interaction between DOC2B and CDH1. In addition, we have identified several EMT and senescence regulators as targets of DOC2B. We show that DOC2B may act as a metastatic suppressor by inhibiting EMT through induction of senescence via DOC2B-calcium-EMT-senescence axis.

Graphical abstract



中文翻译:

DOC2B 的转移抑制是通过抑制上皮间质转化和诱导衰老来介导的

衰老诱导和上皮间质转化 (EMT) 事件是癌症表型谱的对立面。参与这些过程的关键分子可能会在肿瘤进展过程中受到遗传和表观遗传变化的影响或改变。双 C2 样结构域 β (DOC2B) 是双 C2 蛋白家族的细胞内囊泡转运蛋白,在胞吐作用、神经递质释放和细胞内囊泡转运中起关键作用。DOC2B 受到 DNA 启动子高甲基化的抑制,并在宫颈癌中起到肿瘤生长调节剂的作用。迄今为止,DOC2B 在宫颈癌进展和转移中的分子机制尚不清楚。本文介绍了 DOC2B 调控的生物学功能和分子机制及其对衰老和 EMT 的影响。DOC2B 抑制通过缓解 Cal27 细胞中的 G0/G1-S 停滞、肌动蛋白重塑和失巢凋亡抗性来促进增殖、生长和迁移。它增强了裸鼠的肿瘤生长和肝转移,同时增加了转移相关的 CD55 和 CD61 表达。DOC2B 抑制 EMT 和促进衰老是一个钙依赖性过程,并伴随着钙介导的 DOC2B 和 CDH1 之间的相互作用。此外,我们已经确定了几种 EMT 和衰老调节剂作为 DOC2B 的目标。我们表明,DOC2B 可以通过通过 DOC2B-钙-EMT-衰老轴诱导衰老来抑制 EMT 来充当转移抑制因子。它增强了裸鼠的肿瘤生长和肝转移,同时增加了转移相关的 CD55 和 CD61 表达。DOC2B 抑制 EMT 和促进衰老是一个钙依赖性过程,并伴随着钙介导的 DOC2B 和 CDH1 之间的相互作用。此外,我们已经确定了几种 EMT 和衰老调节剂作为 DOC2B 的目标。我们表明,DOC2B 可以通过通过 DOC2B-钙-EMT-衰老轴诱导衰老来抑制 EMT 来充当转移抑制因子。它增强了裸鼠的肿瘤生长和肝转移,同时增加了转移相关的 CD55 和 CD61 表达。DOC2B 抑制 EMT 和促进衰老是一个钙依赖性过程,并伴随着钙介导的 DOC2B 和 CDH1 之间的相互作用。此外,我们已经确定了几种 EMT 和衰老调节剂作为 DOC2B 的目标。我们表明,DOC2B 可以通过通过 DOC2B-钙-EMT-衰老轴诱导衰老来抑制 EMT 来充当转移抑制因子。

图形概要

更新日期:2021-03-24
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