Abstract
As the most common cardiovascular disease, atherosclerosis (AS), is a leading cause of high mortality in patients with chronic renal failure. Rab27a has been reported to regulate the progression of cardiovascular and renal diseases. Nevertheless, little studies investigated the role and mechanism of Rab27a in uremic-accelerated AS (UAAS). An animal model of UAAS was established in apolipoprotein E knockout (apoE−/−) mice using 5/6 nephrectomy (NX). We conducted in vitro and in vivo functional experiments to explore the role of Rab27a in UAAS, including the presence of oxidized low-density lipoprotein (ox-LDL). Rab27a expression was upregulated in the plaque tissues of NX apoE−/− mice. The knockout of Rab27a (Rab27a−/−) reduced AS-induced artery injury, as manifested by the reductions of plaque area, collagen deposition, inflammation and lipid droplet. Besides, cholesterol efflux was increased, while the expression of lipid metabolism-related proteins and the secretions of pro-inflammatory factors were decreased in ox-LDL-induced NX Rab27a−/− apoE−/− mice group. Further, Rab27a deletion inhibited the activation of nuclear factor κB (NF-κB) pathway. In conclusion, our study indicated that Rab27a deficiency attenuated foam cell formation and macrophage inflammation, depending on the NF-κB pathway activation, to inhibit AS progression in uremic apoE−/− mice. This finding may provide a new targeting strategy for UAAS therapy.
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The data set used and/or analyzed in the current study can be obtained from the corresponding author upon reasonable request.
Change history
14 July 2023
A Correction to this paper has been published: https://doi.org/10.1007/s10735-023-10138-5
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Funding
This research was supported by National Natural Science Foundation of China (Grant No. 81200541), ‘PRO•Run’ Fund of the Nephrology Group of CEBM (Grant No. KYS2021-03-02-9), Key Research and Development Program of Shaanxi (Grant No. 2020KW-043), Xi’an Science and Technology Project (Grant No. 201805095YX3SF29), The Fundamental Research Funds for the Central Universities (Grant No. xjj2017047), Shaanxi Provincial Health and Family Planning Scientific Research Fund Project, China (Grant No. 2016D064) and China Scholarship Fund (Grant No. 201506285033).
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The study was approved by the institutional ethics committee for animal experiments of Xi’an Jiaotong University (No. 2012-600). And carried out in accordance with the guidelines of Laboratory Animal Management Regulations.
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Shen, Y., Gao, Y., Fu, J. et al. Lack of Rab27a attenuates foam cell formation and macrophage inflammation in uremic apolipoprotein E knockout mice. J Mol Histol 54, 183–193 (2023). https://doi.org/10.1007/s10735-023-10125-w
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DOI: https://doi.org/10.1007/s10735-023-10125-w