Abstract
Atherosclerosis (AS) is a pivotal pathological basis of cardiovascular and cerebrovascular diseases, and circular RNAs (circRNAs) has been disclosed to exert a vital part in the progression of AS. However, the functions of circ_0004872 in the progression of AS is indistinct. In this context, we aimed to elucidate the role of circ_0004872 and the potential mechanism in AS. The level of circ_0004872, miR-424-5p and fibroblast growth factor receptor substrate 2 (FRS2) was detected using quantitative real-time polymerase chain reaction (qRT-PCR). Cell proliferation was monitored by Cell Counting Kit-8 and 5-ethynyl-2′-deoxyuridine (EDU) assays. The invasion and migration capabilities of VSMCs were tested by transwell assays and wound-healing assay, respectively. Western blot was adopted to check the protein levels of CyclinD1, Vimentin and FRS2. Dual-luciferase reporter and RNA immunoprecipitation assay were executed to manifest the interaction between miR-424-5p and circ_0004872 or FRS2. The level of circ_0004872 was increased in the serum samples of AS patients and ox-LDL-exposed VSMCs. Ox-LDL exposure triggered cell proliferation, invasion and migration ability of VSMCs. depletion of circ_0004872 partly weakened ox-LDL-mediated effects in VSMCs. Mechanistically, circ_0004872 functioned as a sponge of miR-424-5p, and miR-424-5p inhibition partly alleviated circ_0004872 deficiency-mediated influences in VSMCs. Additionally, miR-424-5p interacted with FRS2, and miR-424-5p constrained dysfunction in ox-LDL-stimulated VSMCs via reducing FRS2 level. Notably, circ_0004872 functioned as a sponge of miR-424-5p to elevate FRS2 expression. Circ_0004872 accelerated ox-LDL-induced damage via mediating miR-424-5p/FRS2 axis.
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The data sets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This study was supported by the Henan Province Young and Middle-aged Health Innovation Outstanding Young Talents Training Project (No. YXKC2021051); Henan Province High-Level Talent Internationalization Training Funding Project [Yuke(2022)-3] and Henan Province Medical Science and Technology Joint Construction Project (No. LHGJ20210110).
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LY designed and supervised the study. PQ and XC performed experiments and wrote the manuscript. QZ and MC collected data and analyzed data. XL prepared the figures and edited the manuscript. All authors reviewed the manuscript.
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11010_2024_4929_MOESM1_ESM.tif
Supplementary file1 (TIF 128 kb) Supplementary Fig. 1 interference of circ_0004872 effectively rescued ox-LDL-evoked increase of MMP2 and MMP9. MMP2 and MMP9 levels were monitored by western blot analysis in VSMCs. n = 3. Two-way ANOVA followed by Tukey's test. **P < 0.01, ***P < 0.001, ****P < 0.0001
11010_2024_4929_MOESM2_ESM.tif
Supplementary file2 (TIF 73 kb) Supplementary Fig. 2 Circ_0004872 was significantly highly expressed in AS patients. The expression of multiple circRNAs was detected by qRT-PCR. n = 3. Two-way ANOVA followed by Tukey's test. ****P < 0.0001
11010_2024_4929_MOESM3_ESM.tif
Supplementary file3 (TIF 61 kb) Supplementary Fig. 3 Overexpression of miR-424-5p could significantly inhibit the expression of FRS2. The level of multiple mRNAs were monitored by qRT-PCR. n = 3. Two-way ANOVA followed by Tukey's test. *P < 0.05, ****P < 0.0001
11010_2024_4929_MOESM4_ESM.tif
Supplementary file4 (TIF 1158 kb) Supplementary Fig. 4 Overexpression of circ_0004872 accelerated proliferation and invasion of ox-LDL-treated VSMC. A Circ_0004872 expression was assessed in VSMC transfected with circ_0004872 or pCD5-ciR by qRT-PCR. B, C CCK8 and EdU assays were used to measure the proliferation ability of VSMCs. D Invasion capabilities of VSMC were explored by transwell assay. n = 3. A–D One-way ANOVA followed by Tukey's test. **P < 0.01, ***P < 0.001 or ****P < 0.0001
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Qian, P., Cao, X., Zhang, Q. et al. Circ_0004872 deficiency attenuates ox-LDL-induced vascular smooth muscle cell dysfunction by miR-424-5p-dependent regulation of FRS2. Mol Cell Biochem (2024). https://doi.org/10.1007/s11010-024-04929-x
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DOI: https://doi.org/10.1007/s11010-024-04929-x