1.南方医科大学附属广东省人民医院//广东省医学科学院,广东 广州 510080
2.华南理工大学医学院,广东 广州 510006
3.广东省临床药理学重点实验室//南方医科大学附属广东省人民医院//广东省医学科学院,广东 广州 510080
4.广东省心血管病研究所//南方医科大学附属广东省人民医院//广东省医学科学院,广东 广州 510080
周川孟,第一作者,研究方向:心肌纤维化的分子机制,E-mail:13541666148@163.com
单志新,通信作者,研究员,博士生导师,研究方向:非编码RNA与心肌重构,E-mail:shanzhixin@gdph.org.cn
收稿:2025-12-05,
修回:2025-12-23,
录用:2026-02-14,
纸质出版:2026-03-20
移动端阅览
周川孟,关佩莹,吴茹诗等.具有序列相似性的家族162成员A抑制心肌成纤维细胞纤维化表型的作用[J].中山大学学报(医学科学版),2026,47(02):238-250.
ZHOU Chuanmeng,GUAN Peiying,WU Rushi,et al.Inhibitory Role of Family with Sequence Similarity 162 Member A in the Fibrotic Phenotypes of Cardiac Fibroblasts[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(02):238-250.
周川孟,关佩莹,吴茹诗等.具有序列相似性的家族162成员A抑制心肌成纤维细胞纤维化表型的作用[J].中山大学学报(医学科学版),2026,47(02):238-250. DOI: 10.11714/jsysu.med.YX20250186.
ZHOU Chuanmeng,GUAN Peiying,WU Rushi,et al.Inhibitory Role of Family with Sequence Similarity 162 Member A in the Fibrotic Phenotypes of Cardiac Fibroblasts[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(02):238-250. DOI: 10.11714/jsysu.med.YX20250186.
目的
2
探讨线粒体内膜蛋白具有序列相似性的家族162成员A(Fam162a)在心肌纤维化中的表达及其对于心肌成纤维细胞纤维化表型的调控作用。
方法
2
利用心力衰竭(HF)患者的心肌样本、主动脉缩窄手术(TAC)诱导心肌重构的小鼠心肌组织,检测Fam162a蛋白表达水平。分离培养新生小鼠原代心肌成纤维细胞(mCFs),建立血管紧张素 Ⅱ(Ang Ⅱ)诱导的心肌纤维化细胞模型,检测Fam162a蛋白表达水平。利用重组腺病毒介导在mCFs中过表达Fam162a,利用小干扰RNA(siRNA)进行mCFs中Fam162a的敲降。采用 Western blot 检测纤维化相关蛋白(包括COL1A1、COL3A1、α-SMA)表达,EdU染色实验评估细胞增殖能力,划痕和Transwell实验评估细胞的迁移能力,免疫荧光实验检测线粒体膜电位(TMRE)变化,分别检测mCFs内总活性氧(ROS)和活细胞线粒体内ROS水平,检测ATP水平反映细胞整体能量代谢情况。
结果
2
Western blot结果显示在HF患者、TAC小鼠心肌及Ang Ⅱ处理的mCFs中COL1A1、COL3A1和α-SMA表达显著上升,而Fam162a表达显著下降(均
P
<0.05)。利用腺病毒介导过表达Fam162a可显著抑制Ang Ⅱ诱导的mCFs中纤维化相关基因表达、抑制mCFs增殖和迁移能力,而通过siRNA敲降Fam162a可加剧Ang II诱导的mCFs纤维化表型。进一步研究发现,在加入线粒体氧化呼吸链阻滞剂鱼藤酮(Rotenone)后,过表达Fam162a抑制Ang Ⅱ诱导的mCFs纤维化表型的作用被抑制,并且伴随出现线粒体膜电位下降、ROS大量产生而ATP生成不足。
结论
2
Fam162a通过维持线粒体膜电位,促进ATP生成,降低ROS产生和Smad3信号活化发挥抑制心肌成纤维细胞纤维化表型的作用。
Objective
2
To investigate the expression of family with sequence similarity 162 member A (Fam162a), a mitochondrial inner membrane protein, in the fibrosis of cardiac fibroblasts and its regulatory role in modulating the fibrotic phenotype of cardiac fibroblasts.
Methods
2
Fam162a protein expression was detected in myocardial samples from patients with heart failure (HF) and mice with transverse aortic constriction (TAC)-induced myocardial remodeling. Primary neonatal mouse cardiac fibroblasts (mCFs) were isolated and cultured, and a cell model of angiotensin Ⅱ (Ang Ⅱ)-induced myocardial fibrosis was established to determine Fam162a protein expression. Recombinant adenovirus was used to mediate Fam162a overexpression, while small interfering RNA (si-RNA) was employed for Fam162a knockdown. Western blot was performed to detect the expression of fibrosis-related proteins, including COL1A1, COL3A1, and α-SMA. EdU staining assay was used to evaluate cell proliferation capacity, and scratch assay combined with Transwell assay was conducted to assess cell migration ability. Immunofluorescence assay was applied to measure mitochondrial membrane potential for reflecting mitochondrial dysfunction; reactive oxygen species (ROS) detection was performed to evaluate cellular oxidative stress status; MitoSox assay was used to reflect the degree of mitochondrial oxidative damage; and ATP detection was conducted to assess the overall cellular energy metabolism.
Results
2
Fam162a expression was significantly downregulated in the myocardium of HF patients and TAC mice, and Ang Ⅱ-treated mCFs, accompanied by increased expression of COL1A1, COL3A1, and α-SMA (all
P
<0.05). Adenovirus-mediated overexpression of Fam162a significantly inhibited Ang Ⅱ-induced upregulation of fibrosis-related genes, as well as cell proliferation and migration. Accordingly, silencing Fam162a aggravated the fibrotic phenotypes of mCFs treated with Ang II. Further studies revealed that the inhibitory effect of Fam162a overexpression on Ang Ⅱ-induced fibrotic phenotype was suppressed following the addition of rotenone (a mitochondrial oxidative respiratory chain inhibitor), which was accompanied by mitochondrial membrane potential depolarization, excessive ROS production, and insufficient ATP generation.
Conclusion
2
Fam162a exerts its inhibitory effect on the fibrotic phenotype of cardiac fibroblasts by maintaining mitochondrial membrane potential, promoting ATP production, reducing reactive oxygen species (ROS) generation, and suppressing Smad3 signaling activation.
Maruyama K , Imanaka-Yoshida K . The pathogenesis of cardiac fibrosis: a review of recent progress [J]. Int J Mol Sci , 2022 , 23 ( 5 ): 2617 .
Sarohi V , Chakraborty S , Basak T . Exploring the cardiac ECM during fibrosis: a new era with next-gen proteomics [J]. Front Mol Biosci , 2022 , 9 : 1030226 .
Liu W , Wu X , Zeng W , et al . Cardiac fibrosis: from mechanisms and models to medicines [J]. Trends Pharmacol Sci , 2025 , 46 ( 11 ): 1072 - 1090 .
Li X , Zhang W , Cao Q , et al . Mitochondrial dysfunction in fibrotic diseases [J]. Cell Death Discov , 2020 , 6 : 80 .
Li C , Meng X , Wang L , Dai X . Mechanism of action of non-coding RNAs and traditional Chinese medicine in myocardial fibrosis: focus on the TGF-β/Smad signaling pathway [J]. Front Pharmacol , 2023 , 14 : 1092148 .
黄德荣 , 文庆 , 苏宇辰 . 转录因子E4BP4通过AMPK-TGF-β1/SMAD3信号转导途径调控病理性心肌纤维化 [J]. 重庆医科大学学报 , 2025 , 50 ( 5 ): 640 - 648 .
Huang DR , Wen Q , Su YC . Regulatory effect of transcription factor E4BP4 on pathological myocardial fibrosis through the AMPK-TGF-β1/SMAD3 signaling pathway [J]. J Chongqing Med Univ , 2025 , 50 ( 5 ): 640 - 648 .
Lee SH , Hadipour-Lakmehsari S , Kim DH , et al . Bioinformatic analysis of membrane and associated proteins in murine cardiomyocytes and human myocardium [J]. Sci Data , 2020 , 7 ( 1 ): 425 ..
Ravindran S , Rau CD . The multifaceted role of mitochondria in cardiac function: insights and approaches [J]. Cell Commun Signal , 2024 , 22 ( 1 ): 525 .
Zhang PH , Li NN , Gu X , et al . Interaction between mitochondrial oxidative stress and myocardial fibrosis in the context of diabetes [J]. Front Endocrinol (Lausanne) , 2025 , 16 : 1596436 .
Jin Y , Ren W , Liu J , et al . Identification and validation of potential hypoxia-related genes associated with coronary artery disease [J]. Front Physiol , 2023 , 14 : 1181510 .
Lee MJ , Kim JY , Suk K , et al . Identification of the hypoxia-inducible factor 1 alpha-responsive HGTD-P gene as a mediator in the mitochondrial apoptotic pathway [J]. Mol Cell Biol , 2004 , 24 ( 9 ): 3918 - 3927 .
温艺红 , 杨真祯 , 张铭 , 等 . CircRNA_100395 通过结合 miR-144-3p 抑制心肌成纤维细胞中纤维化相关基因的表达 [J]. 中山大学学报(医学科学版) , 2020 , 41 ( 6 ): 875 - 883 .
Wen YH , Yang ZZ , Zhang M , et al . CircRNA_100395 inhibits expression of myocardial fibrosis-related genes in human atrial myofibroblasts via sponging miR-144-3p [J]. J Sun Yat-sen Univ(Med Sci) , 2020 , 41 ( 6 ): 875 - 883 .
丰嘉欣 , 郭继深 , 梁俣 等 . Circ_0018478 通过编码 HERC4193 发挥抑制心肌成纤维细胞纤维化表型的作用 [J]. 中山大学学报(医学科学版) , 2022 , 43 ( 6 ): 995 - 1004 .
Feng JX , Guo JS , Liang Y , et al . Circular RNA circ_0018478 inhibits the fibrotic phenotype of cardiac fibroblasts via encoding protein HERC4-193 [J]. J SUN Yat-sen Univ(Med Sci) , 2022 , 43 ( 6 ): 995 - 1004 .
Chalise U , Hale TM . Fibroblasts under pressure: cardiac fibroblast responses to hypertension and antihypertensive therapies [J]. Am J Physiol Heart Circ Physiol , 2024 , 326 ( 1 ): H223 - H237 .
Li X , Liu Y , Tang Y , et al . Transformation of macrophages into myofibroblasts in fibrosis-related diseases: emerging biological concepts and potential mechanism [J]. Front Immunol , 2024 , 15 : 1474688 .
Aguado-Alvaro LP , Garitano N , Pelacho B . Fibroblast diversity and epigenetic regulation in cardiac fibrosis [J]. Int J Mol Sci , 2024 , 25 ( 11 ): 6004 .
Hoque MM , Gbadegoye JO , Hassan FO , et al . Cardiac fibrogenesis: an immuno-metabolic perspective [J]. Front Physiol , 2024 , 15 : 1336551 .
Li L , Lu M , Peng Y , et al . Oxidatively stressed extracellular microenvironment drives fibroblast activation and kidney fibrosis [J]. Redox Biol , 2023 , 67 : 102868 .
Fong-McMaster C , McIlroy E , Levesque MM , et al . Complexome profiling identifies changes in mitochondrial supercomplexes in murine heart failure [J]. Am J Physiol Heart Circ Physiol , 2025 , 329 ( 2 ): H330 - H339 .
0
浏览量
19
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621
