
浏览全部资源
扫码关注微信
1.西北妇女儿童医院儿童保健科,西安 710061
2.西北妇女儿童医院医学遗传中心,西安 710061
孙思媛,Email:ssy116729@126.com,研究方向:儿童保健。
蔡 娜,Email:nannancnn@126.com。
收稿:2024-01-26,
修回:2024-12-11,
录用:2024-12-19,
纸质出版:2025-08-28
移动端阅览
孙思媛,蔡娜.PRMT7在Duchenne肌营养不良小鼠肌肉炎症、氧化应激和纤维化中的作用及机制研究[J].重庆医科大学学报,2025,50(8):1071-1077.
Sun Siyuan,Cai Na.Role and mechanism of PRMT7 in muscle inflammation,oxidative stress, and fibrosis in Duchenne muscular dystrophy mice[J].Journal of Chongqing Medical University,2025,50(8):1071-1077.
孙思媛,蔡娜.PRMT7在Duchenne肌营养不良小鼠肌肉炎症、氧化应激和纤维化中的作用及机制研究[J].重庆医科大学学报,2025,50(8):1071-1077. DOI: 10.13406/j.cnki.cyxb.003742.
Sun Siyuan,Cai Na.Role and mechanism of PRMT7 in muscle inflammation,oxidative stress, and fibrosis in Duchenne muscular dystrophy mice[J].Journal of Chongqing Medical University,2025,50(8):1071-1077. DOI: 10.13406/j.cnki.cyxb.003742.
目的
2
探究蛋白精氨酸甲基转移酶7(protein arginine methyltransferase 7,PRMT7)在Duchenne肌营养不良(duchenne muscular dystrophy,DMD)小鼠肌肉炎症、氧化应激和纤维化中的作用和机制。
方法
2
本研究以C57BL/6野生型小鼠为对照组,以小鼠为DMD疾病模型组,以尾静脉注射AAV9-PRMT7的mdx小鼠为实验组。采用酶联免疫吸附实验(enzyme-linked immunosorbent assay,ELISA)法测定炎症因子水平;利用商业试剂盒检测氧化应激相关指标;通过Masson染色评估腓肠肌纤维化程度;通过Western blot实验检测PRMT7、过氧化物酶体增殖物激活受体γ共激活因子-1α(peroxisome proliferator activated receptor gamma coactivator-1 alpha,PGC-1α)和核因子红系2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)的表达;通过免疫沉淀实验检测PGC-1α的精氨酸甲基化水平。
结果
2
PRMT7在mdx小鼠腓肠肌中的表达量显著减少(0.67±0.03,
F
= 70.764,
P
=0.001);上调PRMT7显著降低mdx小鼠腓肠肌中的炎症因子水平[白细胞介素-1β(interleukin-1 beta,IL-1β):167.87±13.25,
F
=407.751,
P
<
0.001;肿瘤坏死因子-α(tumour necrosis factor-α,TNF-α):1 071.54±46.63,
F
=55.996,
P
=0.048];上调PRMT7明显改善mdx小鼠腓肠肌的氧化应激和纤维化状态[活性氧(reactive oxygen species,ROS):1.16±0.03,
F
=86.820,
P
=0.008;丙二醛(malondialdehyde,MDA):66.11±3.84,
F
=228.175,
P
=0.001;谷胱甘肽(reduced glutathione,GSH)/氧化型谷胱甘肽(oxidized glutathione disulfide,GSSG):2.53±0.06,
F
=499.962,
P
<
0.001;纤维化面积:10.33±0.47,
F
=604.272,
P
=0.002);上调PRMT7提高PGC-1α精氨酸甲基化水平;上调PRMT7显
著提高PGC-1α和Nrf2的蛋白水平(PGC-1α:1.94±0.11,
F=
31.565
,P=
0.038;Nrf2:1.53±0.12,
F=
140.761,
P<
0.001)。
结论
2
促进PRMT7的表达能够减轻mdx小鼠腓肠肌中的炎症、氧化应激和纤维化病理状态,这些作用可能是通过PGC-1α/Nrf2通路来实现的。
Objective
2
To investigate the role and mechanism of protein arginine methyltransferase 7(PRMT7) in muscle inflammation,oxidative stress,and fibrosis in Duchenne muscular dystrophy mice.
Methods
2
In this study,C57BL/6 wild-type mice were used as the control group,mdx mice as the model group of Duchenne muscular dystrophy,and mdx mice injected with AAV9-PRMT7 by the caudal vein as the experimental group. The levels of inflammatory factors were measured by an enzyme-linked immunosorbent assay. Oxidative stress-related indicators were measured using commercial kits. Masson staining was performed to assess the fibrosis degree of the gastrocnemius. The expression of PRMT7,peroxisome proliferator-activated receptor gamma coactivator-1 alpha(PGC-1α),and nuclear factor erythroid 2-related factor 2(Nrf2) was analyzed by a Western blot assay. The arginine methylation level of PGC-1α was determined by an immunoprecipitation assay.
Results
2
PRMT7 expression was significantly reduced in the gastrocnemius of mdx mice (0.67±0.03,
F=
70.764,
P
=0.001). The up-regulation of PRMT7 resulted in significant decreases in the levels of inflammatory factors (interleukin-1β:167.87±13.25,
F=
407.751,
P
<
0.001; tumor necrosis factor-α:1071.54±46.63,
F=
55.996,
P
=0.048) and significant improvements in the oxidative stress and fibrosis status in the gastrocnemius of mdx mice(reactive oxygen species:1.16±0.03,
F=
86.820,
P
=0.008;malondialdehyde:66.11±3.84,
F=
228.175,
P
=0.001;gl
utathione/oxidized glutathione:2.53±0.06,
F=
499.962,
P
<
0.001;fibrosis area:10.33±0.47,
F=
604.272,
P
=0.002),an increase in the arginine methylation level of PGC-1α,and significant increases in protein levels of PGC-1α and Nrf2(PGC-1α:1.94±0.11,
F=
31.565,
P=
0.038;Nrf2:1.53±0.12,
F=
140.761
,P<
0.001).
Conclusion
2
Increasing PRMT7 expression attenuates the inflammation,oxidative stress,and pathological state of fibrosis in the gastrocnemius of mdx mice. Thses effects may be achieved through the PGC-1α/Nrf2 pathway.
Grounds MD , Terrill JR , Al-Mshhdani BA , et al . Biomarkers for Duchenne muscular dystrophy:myonecrosis,inflammation and oxidative stress [J ] . Dis Model Mech , 2020 , 13 ( 2 ): 1245 - 1264 .
Kharraz Y , Guerra J , Pessina P , et al . Understanding the process of fibrosis in Duchenne muscular dystrophy [J ] . Biomed Res Int , 2014 , 2014 : 965631 .
Yao SS , Chen ZH , Yu YY , et al . Current pharmacological strategies for Duchenne muscular dystrophy [J ] . Front Cell Dev Biol , 2021 , 9 : 689533 .
Yonekawa T , Rauckhorst AJ , El-Hattab S , et al . Large1 gene transfer in older myd mice with severe muscular dystrophy restores muscle function and greatly improves survival [J ] . Sci Adv , 2022 , 8 ( 21 ): eabn0379 .
Potter RA , Griffin DA , Heller KN , et al . Do se-escalation study of systemically delivered rAAVrh74. MHCK7. micro-dystrophin in the mdx mouse model of Duchenne muscular dystrophy [J ] . Hum Gene Ther , 2021 , 32 ( 7/8 ): 375 - 389 .
Jeong HJ , Lee SJ , Lee HJ , et al . Prmt7 promotes myoblast differentiation via methylation of p38MAPK on arginine residue 70 [J ] . Cell Death Differ , 2020 , 27 ( 2 ): 573 - 586 .
Blanc RS , Vogel G , Chen TP , et al . PRMT7 preserves satellite cell regenerative capacity [J ] . Cell Rep , 2016 , 14 ( 6 ): 1528 - 1539 .
Yoo A , Jang YJ , Ahn J , et al . Chrysanthemi zawadskii var. Latilobum attenuates obesity-induced skeletal muscle atrophy via regulation of PRMTs in skeletal muscle of mice [J ] . Int J Mol Sci , 2020 , 21 ( 8 ): 2811 .
Jeong HJ , Lee HJ , Vuong TA , et al . Prmt7 deficiency causes reduced skeletal muscle oxidative metabolism and age-related obesity [J ] . Diabetes , 2016 , 65 ( 7 ): 1868 - 1882 .
Liang DS , Huang AR , Jin YM , et al . Protective effects of exogenous NaHS against sepsis-induced myocardial mitochondrial injury by enhancing the PGC-1α/NRF2 pathway and mitochondrial biosynthesis in mice [J ] . Am J Transl Res , 2018 , 10 ( 5 ): 1422 - 1430 .
Mendoza M , Mendoza M , Lubrino T , et al . Arginine methylation of the PGC-1α C-terminus is temperature-dependent [J ] . Biochemistry , 2023 , 62 ( 1 ): 22 - 34 .
Mendell JR , Al-Zaidy S , Shell R , et al . Single-dose gene-replacement therapy for spinal muscular atrophy [J ] . N Engl J Med , 2017 , 377 ( 18 ): 1713 - 1722 .
Duan DS . Systemic AAV micro-dystrophin gene therapy for Duchenne muscular dystrophy [J ] . Mol Ther , 2018 , 26 ( 10 ): 2337 - 2356 .
Wasala NB , Yue YP , Lostal W , et al . Single SERCA2a therapy ameliorated dilated cardiomyopathy for 18 months in a mouse model of Duchenne muscular dystrophy [J ] . Mol Ther , 2020 , 28 ( 3 ): 845 - 854 .
He HC , Chen JL , Zhao J , et al . PRMT7 targets of Foxm1 controls alveolar myofibroblast proliferation and differentiation during alveologenesis [J ] . Cell Death Dis , 2021 , 12 ( 9 ): 841 .
Suntar I , Sureda A , Belwal T , et al . Natural products,PGC-1 α ,and Duchenne muscular dystrophy [J ] . Acta Pharm Sin B , 2020 , 10 ( 5 ): 734 - 745 .
Handschin C , Kobayashi YM , Chin S , et al . PGC-1alpha regulates the neuromuscular junction program and ameliorates Duchenne muscular dystrophy [J ] . Genes Dev , 2007 , 21 ( 7 ): 770 - 783 .
Wang L , Wang XH , Kong LN , et al . Isoliquiritigenin alleviates LPS/D-GalN-induced acute liver failure by activating the PGC-1α/Nrf2 pathway to reduce oxidative stress and inflammatory response [J ] . Int Immunopharmacol , 2021 , 100 : 108159 .
Kourakis S , Timpani CA , de Haan JB , et al . Targeting Nrf2 for the treatment of Duchenne muscular dystrophy [J ] . Redox Biol , 2021 , 38 : 101803 .
0
浏览量
4
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