Drp1 Regulated Mitochondrial Hypofission Promotes the Invasion and Proliferation of Growth Hormone-Secreting Pituitary Adenomas via Activating STAT3

作者全名："Zhang, Yin; Zhang, Lei; Fan, Kexia; Gou, Yajun; Zang, Zhenle; Ding, Xiao; Yang, Hui; Li, Song"

作者地址："[Zhang, Yin; Fan, Kexia; Zang, Zhenle; Ding, Xiao; Yang, Hui; Li, Song] Army Med Univ, Xinqiao Hosp, Multidsciplinary Ctr Pituitary Adenomas Chongqing, Dept Neurosurg, Chongqing, Peoples R China; [Zhang, Yin; Gou, Yajun] Peoples Hosp Shapingba Dist, Dept Neurosurg, Chongqing, Peoples R China; [Zhang, Lei] Chongqing Med Univ, Dept Histol & Embryol, Chongqing, Peoples R China; [Yang, Hui; Li, Song] Chongqing Inst Brian & Intelligence, Guangyang Bay Lab, Chongqing, Peoples R China"

通信作者："Yang, H; Li, S (通讯作者)，Army Med Univ, Xinqiao Hosp, Multidsciplinary Ctr Pituitary Adenomas Chongqing, Dept Neurosurg, Chongqing, Peoples R China.; Yang, H; Li, S (通讯作者)，Chongqing Inst Brian & Intelligence, Guangyang Bay Lab, Chongqing, Peoples R China."

来源：FRONTIERS IN ONCOLOGY

ESI学科分类：CLINICAL MEDICINE

WOS号：WOS:000792235000001

JCR分区：Q2

影响因子：4.7

年份：2022

卷号：12

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：growth hormone-secreting pituitary adenomas; DRP1; mitochondrial fission; stat3; invasion; proliferation

摘要："The invasiveness and high proliferation rate of growth hormone-secreting pituitary adenomas (GHPAs) are closely related to poor prognosis in patients. We previously reported that abnormal glycolysis participates in this process; however, the role of mitochondria in the invasion and proliferation of GHPAs remains unknown. In the current study, stereological methods were first used to quantitatively calculate the number and morphology of mitochondria. The results revealed that the numbers, volumes and membrane areas of mitochondria were decreased in invasive GHPAs (IGHPAs) samples compared to noninvasive GHPAs (NIGHPAs) samples. Furthermore, significantly downregulated mRNA and protein levels of dynamin-related protein 1 (Drp1) were detected in IGHPAs, but no notable changes in fusion related molecules (Mfn1, Mfn2 and OPA1) were detected, suggesting that the abnormal mitochondrial dynamics in IGHPAs are characterized by hypofission. Mitochondrial hypofission caused by Mdivi-1, a specific Drp1 inhibitor, enhanced the invasion and proliferation of GH3 cell lines and primary cells from patients with GHPAs in vitro and in vivo, while overexpression of Drp1 reversed these processes. Mechanistically, mitochondrial hypofission might activate signal transducer and activator of transcription 3 (STAT3). Specifically, elevated nuclear pSTAT3(Y705) may promote GH3 cell invasion by upregulating the activity of matrix metalloproteinase 2/9, and elevated mitochondrial pSTAT3(S727) may promote GH3 cell proliferation by inhibiting the mitochondria-dependent apoptotic pathway. Taken together, our findings suggest that mitochondrial hypofission induced by Drp1 might strengthen the invasion and proliferation of GHPA tumor cells by activating STAT3, providing us with a new perspective on how mitochondria regulate the development of IGHPAs."

基金机构：Nursery Project of Army Medical University [2019R054]; Natural Science Foundation of Chongqing [cstc2019jcyj-msxmX0475]; Basic Research Project of Army Military Medical University [2019XQN12]

基金资助正文："This work was supported by the Nursery Project of Army Medical University (No.2019R054),Natural Science Foundation of Chongqing (No.cstc2019jcyj-msxmX0475) and Basic Research Project of Army Military Medical University (2019XQN12)."