Abstract
Vascular smooth muscle cells (VSMCs) are associated with differentiated, organized, and contractile phenotype under the effect of various types of physiological conditions those are associated with migratory, proliferative, and synthetic phenotype under the effect of various types of stimuli, which dysfunction drives many cardiovascular diseases. Abnormal cell proliferation and invasion of VSMCs are among the primary causes of hypertension. Apatinib is a small-molecule tyrosine kinase inhibitor (TKI) that highly selectively binds to and strongly inhibits VEGFR-2. Previous studies have confirmed that the TKIs can raise blood pressure through RhoA/ROCK pathway. LARG is a key gene in the RhoA/ROCK pathway and plays a critical role in the continuous vasoconstriction function because it regulates part of signal transduction in VSMCs. In this study, an in vitro experiment was conducted to observe that apatinib caused dysfunction of MOVAS cells through the RhoA/ROCK signalling pathway and Y27632, a nonspecific ROCK inhibitor, and knockout of LARG gene can improve the proliferation, antiapoptosis, oxidative stress, and mitochondrial autophagy of apatinib-induced MOVAS cells. These findings suggest that activation of the RhoA/ROCK signalling pathway could be the underlying mechanism of apatinib-induced dysfunction of MOVAS cells, while ROCK inhibitor and knockout of LARG gene have potential therapeutic value.
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Abbreviations
- RhoA:
-
Rho-associated
- ROCK:
-
Rho-associated coiled-coil domain-containing protein kinase
- LARG:
-
Leukaemia-associated Rho-GEF
- BP:
-
Blood pressure
- TKIs:
-
Tyrosine kinase inhibitors
- VEGFR-2:
-
Vascular endothelial growth factor receptor-2
- VSMCs:
-
Vascular smooth muscle cells
- MYPT1:
-
Myosin phosphatase target-1
- MLC:
-
Myosin light chain
- MLCP:
-
Myosin light chain phosphatase
- CCK-8:
-
Cell counting kit-8
- shRNA:
-
RNA-short hairpin RNA
- ET-1:
-
Endothelin-1
- eNOS:
-
Endothelial nitric oxide synthase
- iNOS:
-
Inducible nitric oxide synthase
- a-SMA:
-
Alpha smooth muscle actin
- LC3:
-
MAP1LC3
- ROS:
-
Photo-activated reactive oxygen species
- Bax:
-
BCL2-Associated X
- Bcl2:
-
B cell lymphoma/leukaemia-2
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Funding
This study was supported by the National Natural Science Foundation of China (NSFC-81960086, NSFC-81670385 to Jing Yu) and Science and Technology Department of Gansu Province (21JR1RA150) and Education Department of Gansu Province (2021B-043), and Cuiying Scientific and Technological Innovation Program of Lanzhou University Second Hospital (2020QN-07).
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Wenjuan Wang performed the experiments. Jing Yu, Qiongying Wang Caie Li, and Wenjuan Wang designed the study, and Wenjuan Wang wrote the initial draft of the manuscript. Qingjian He, Haodong Zhang, Chenchen Zhuang, and Fanxin analysed the data. All the authors have read and approved the final manuscript.
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Wang, W., He, Q., Zhuang, C. et al. Apatinib Through Activating the RhoA/ROCK Signaling Pathway to Cause Dysfunction of Vascular Smooth Muscle Cells. Appl Biochem Biotechnol 194, 5367–5385 (2022). https://doi.org/10.1007/s12010-022-04020-5
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DOI: https://doi.org/10.1007/s12010-022-04020-5