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Sun J, Guo X, Yu P, Liang J, Mo Z, Zhang M, Yang L, Huang X, Hu B, Liu J, Ouyang Y, He M. Vasorin deficiency leads to cardiac hypertrophy by targeting MYL7 in young mice. J Cell Mol Med 2021; 26:88-98. [PMID: 34854218 PMCID: PMC8742182 DOI: 10.1111/jcmm.17034] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 09/22/2021] [Accepted: 09/30/2021] [Indexed: 01/03/2023] Open
Abstract
Vasorin (VASN) is an important transmembrane protein associated with development and disease. However, it is not clear whether the death of mice with VASN deficiency (VASN-/- ) is related to cardiac dysfunction. The aim of this research was to ascertain whether VASN induces pathological cardiac hypertrophy by targeting myosin light chain 7 (MYL7). VASN-/- mice were produced by CRISPR/Cas9 technology and inbreeding. PCR amplification, electrophoresis, real-time PCR and Western blotting were used to confirm VASN deficiency. Cardiac hypertrophy was examined by blood tests, histological analysis and real-time PCR, and key downstream factors were identified by RNA sequencing and real-time PCR. Western blotting, immunohistochemistry and electron microscopy analysis were used to confirm the downregulation of MYL7 production and cardiac structural changes. Our results showed that sudden death of VASN-/- mice occurred 21-28 days after birth. The obvious increases in cardiovascular risk, heart weight and myocardial volume and the upregulation of hypertrophy marker gene expression indicated that cardiac hypertrophy may be the cause of death in young VASN-/- mice. Transcriptome analysis revealed that VASN deficiency led to MYL7 downregulation, which induced myocardial structure abnormalities and disorders. Our results revealed a pathological phenomenon in which VASN deficiency may lead to cardiac hypertrophy by downregulating MYL7 production. However, more research is necessary to elucidate the underlying mechanism.
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Affiliation(s)
- Junming Sun
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Xiaoping Guo
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Ping Yu
- Department of Cardiology, The Second Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi, China
| | - Jinning Liang
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Zhongxiang Mo
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Mingyuan Zhang
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Lichao Yang
- School of Public Health, Guangxi Medical University, Nanning, China
| | - Xuejing Huang
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Bing Hu
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Jiajuan Liu
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Yiqiang Ouyang
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China
| | - Min He
- Laboratory Animal Center, Guangxi Medical University, Nanning, Guangxi, China.,School of Public Health, Guangxi Medical University, Nanning, China.,Ministry of Education, Key Laboratory of High-Incidence-Tumor Prevention & Treatment, (Guangxi Medical University), Nanning, China
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Hoog TG, Fredrickson SJ, Hsu CW, Senger SM, Dickinson ME, Udan RS. The effects of reduced hemodynamic loading on morphogenesis of the mouse embryonic heart. Dev Biol 2018; 442:127-137. [PMID: 30012423 DOI: 10.1016/j.ydbio.2018.07.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 12/20/2022]
Abstract
Development of the embryonic heart involves an intricate network of biochemical and genetic cues to ensure its proper growth and morphogenesis. However, studies from avian and teleost models reveal that biomechanical force, namely hemodynamic loading (blood pressure and shear stress), plays a significant role in regulating heart development. To study how hemodynamic loading impacts development of the mammalian embryonic heart, we utilized mouse embryo culture and manipulation techniques and performed optical projection tomography imaging followed by morphometric analysis to determine how reduced-loading affects heart volume, myocardial thickness, trabeculation and looping. Our results reveal that hemodynamic loading can regulate these features at different thresholds. Intermediate levels of hemodynamic loading are sufficient to promote proper myocardial growth and heart size, but insufficient to promote looping and trabeculation. Whereas, low levels of hemodynamic loading fails to promote proper growth of the myocardium and heart size. These results reveal that the regulation of heart development by biomechanical force is conserved across many vertebrate classes, and this study begins to elucidate how these specific forces regulate development of the mammalian heart.
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Affiliation(s)
- Tanner G Hoog
- Department of Biology, Missouri State University, United States
| | | | - Chih-Wei Hsu
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, United States
| | - Steven M Senger
- Department of Mathematics, Missouri State University, United States
| | - Mary E Dickinson
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, United States
| | - Ryan S Udan
- Department of Biology, Missouri State University, United States.
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Abstract
PURPOSE OF REVIEW The study of cardiac development is critical to inform management strategies for congenital and acquired heart disease. This review serves to highlight some of the advances in this field over the past year. RECENT FINDINGS Three main areas of study are included that have been particularly innovative and progressive. These include more precise gene targeting in animal models of disease and in moving from animal models to human disease, more precise in-vitro models including three-dimensional structuring and inclusion of hemodynamic components, and expanding the concepts of genetic regulation of heart development and disease. SUMMARY Targeted genetics in animal models are able to make use of tissue and time-specific promotors that drive gene expression or knockout with high specificity. In-vitro models can recreate flow patterns in blood vessels and across cardiac valves. Noncoding RNAs, once thought to be of no consequence to gene transcription and translation, prove to be key regulators of genetic function in health and disease.
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