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Zhou Z, Gao P, Zhang T, Yang Y, Ding Q, Wu Z, Wang L. Functional analysis reveals calcium-sensing receptor gene regulating cell-cell junction in renal tubular epithelial cells. Int Urol Nephrol 2024; 56:2165-2177. [PMID: 38372840 DOI: 10.1007/s11255-024-03948-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/04/2024] [Indexed: 02/20/2024]
Abstract
PURPOSE Calcium-sensing receptor (CASR) influences the expression pattern of multiple genes in renal tubular epithelial cells. The objective of this inquiry was to explore the molecular mechanisms of CASR in renal tubular epithelial cells and nephrolithiasis. METHODS HK-2 cells were transfected with lentiviruses carrying either CASR (named CASR) or an empty vector negative control (named NC), as well as shRNA intended to target CASR (named shCASR) or its corresponding negative control (named shNC). CCK-8 assay was used to detect the effect of CASR on the proliferation of HK-2 cells. RNA-Sequencing was applied to explore potential pathways regulated by CASR in HK-2 cells. RESULTS PCR and western blot results showed that CASR expression was significantly increased in CASR cells and was decreased in shCASR cells when compared to their corresponding negative control, respectively. CCK-8 assay revealed that CASR inhibited the proliferation of HK-2 cells. RNA-Sequencing results suggested that the shCASR HK-2 cells exhibited a significant up-regulation of 345 genes and a down-regulation of 366 genes. These differentially expressed genes (DEGs) were related to cell apoptosis and cell development. In CASR HK-2 cells, 1103 DEGs primarily functioned in mitochondrial energy metabolism, and amino acid metabolism. With the Venn diagram, 4 DEGs (Clorf116, ENPP3, IL20RB, and CLDN2) were selected as the hub genes regulated by CASR. Enrichment analysis revealed that these hub genes were involved in cell-cell junction, and epithelial cell development. CONCLUSIONS In summary, our investigation has the potential to offer novel perspectives on CASR regulating cell-cell junction in HK-2 cells.
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Affiliation(s)
- Zijian Zhou
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China
| | - Peng Gao
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China
| | - Tongtong Zhang
- Urology Centre, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200040, People's Republic of China
| | - Yuanyuan Yang
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China
| | - Qiang Ding
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China
| | - Zhong Wu
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China.
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China.
| | - Lujia Wang
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China.
- Clinical Research Center of Urolithiasis, Shanghai Medical College, Fudan University, Shanghai, 200040, People's Republic of China.
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He TQ, Wang Z, Li CY, Zhao YW, Tong XY, Liu JH, Ouyang JM. Sulfated Laminarin Polysaccharides Reduce the Adhesion of Nano-COM Crystals to Renal Epithelial Cells by Inhibiting Oxidative and Endoplasmic Reticulum Stress. Pharmaceuticals (Basel) 2024; 17:805. [PMID: 38931471 PMCID: PMC11206474 DOI: 10.3390/ph17060805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/19/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Purpose: Adhesion between calcium oxalate crystals and renal tubular epithelial cells is a vital cause of renal stone formation; however, the drugs that inhibit crystal adhesion and the mechanism of inhibition have yet to be explored. Methods: The cell injury model was constructed using nano-COM crystals, and changes in oxidative stress levels, endoplasmic reticulum (ER) stress levels, downstream p38 MAPK protein expression, apoptosis, adhesion protein osteopontin expression, and cell-crystal adhesion were examined in the presence of Laminarin polysaccharide (DLP) and sulfated DLP (SDLP) under protected and unprotected conditions. Results: Both DLP and SDLP inhibited nano-COM damage to human kidney proximal tubular epithelial cell (HK-2), increased cell viability, decreased ROS levels, reduced the opening of mitochondrial membrane permeability transition pore, markedly reduced ER Ca2+ ion concentration and adhesion molecule OPN expression, down-regulated the expression of ER stress signature proteins including CHOP, Caspase 12, and p38 MAPK, and decreased the apoptosis rate of cells. SDLP has a better protective effect on cells than DLP. Conclusions: SDLP protects HK-2 cells from nano-COM crystal-induced apoptosis by reducing oxidative and ER stress levels and their downstream factors, thereby reducing crystal-cell adhesion interactions and the risks of kidney stone formation.
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Affiliation(s)
- Tian-Qu He
- Department of Urology, The Affiliated Children’s Hospital of Xiangya School of Medicine, Central South University (Hunan Children’s Hospital), Changsha 410007, China
| | - Zhi Wang
- Department of Urology, The Affiliated Children’s Hospital of Xiangya School of Medicine, Central South University (Hunan Children’s Hospital), Changsha 410007, China
| | - Chuang-Ye Li
- Department of Urology, The Affiliated Children’s Hospital of Xiangya School of Medicine, Central South University (Hunan Children’s Hospital), Changsha 410007, China
| | - Yao-Wang Zhao
- Department of Urology, The Affiliated Children’s Hospital of Xiangya School of Medicine, Central South University (Hunan Children’s Hospital), Changsha 410007, China
| | - Xin-Yi Tong
- Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Jing-Hong Liu
- Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
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Huang YC, Liu CJ, Lu ZH, Huang HS. Long-Term Sodium Deficiency Reduces Sodium Excretion but Impairs Renal Function and Increases Stone Formation in Hyperoxaluric Calcium Oxalate Rats. Int J Mol Sci 2024; 25:3942. [PMID: 38612752 PMCID: PMC11011831 DOI: 10.3390/ijms25073942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Excessive sodium intake is associated with nephrolithiasis, but the impact of sodium-deficient (SD) diets is unknown. Hence, we investigated the effects of short- and long-term SD diets on the expression of renal aquaporins and sodium transporters, and thus calcium oxalate (CaOx) crystal formation in hyperoxaluria rats. In a short-term sodium balance study, six male rats received drinking water and six received 0.75% ethylene glycol (EG) to induce hyperoxaluria. After a 30-day period of feeding on normal chow, both groups were treated with a normal-sodium diet for 5 days, followed by a sodium-free diet for the next 5 days. In a long-term SD study (42 days), four groups, induced with EG or not, were treated with normal-sodium water and sodium-free drinking water, alternately. Short-term sodium restriction in EG rats reversed the daily positive sodium balance, but progressively caused a negative cumulative water balance. In the long-term study, the abundant levels of of Na/H exchanger, thiazide-sensitive Na-Cl cotransporter, Na-K-ATPase, and aquaporins-1 from SD + EG rats were markedly reduced, corresponding to a decrease in Uosm, as compared to SD rats. Increased urine calcium, AP(CaOx)index, and renal CaOx deposition were also noted in SD + EG rats. Although the SD treatment reduced sodium excretion, it also increased urinary calcium and impaired renal function, ultimately causing the formation of more CaOx crystals.
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Affiliation(s)
| | | | | | - Ho-Shiang Huang
- Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704302, Taiwan; (Y.-C.H.); (C.-J.L.); (Z.-H.L.)
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Wang G, Mi J, Bai J, He Q, Li X, Wang Z. Non-Coding RNAs in Kidney Stones. Biomolecules 2024; 14:213. [PMID: 38397450 PMCID: PMC10886984 DOI: 10.3390/biom14020213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 02/04/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024] Open
Abstract
Nephrolithiasis is a major public health concern associated with high morbidity and recurrence. Despite decades of research, the pathogenesis of nephrolithiasis remains incompletely understood, and effective prevention is lacking. An increasing body of evidence suggests that non-coding RNAs, especially microRNAs (miRNAs) and long non-coding RNAs (lncRNAs), play a role in stone formation and stone-related kidney injury. MiRNAs have been studied quite extensively in nephrolithiasis, and a plethora of specific miRNAs have been implicated in the pathogenesis of nephrolithiasis, involving remarkable changes in calcium metabolism, oxalate metabolism, oxidative stress, cell-crystal adhesion, cellular autophagy, apoptosis, and macrophage (Mp) polarization and metabolism. Emerging evidence suggests a potential for miRNAs as novel diagnostic biomarkers of nephrolithiasis. LncRNAs act as competing endogenous RNAs (ceRNAs) to bind miRNAs, thereby modulating mRNA expression to participate in the regulation of physiological mechanisms in kidney stones. Small interfering RNAs (siRNAs) may provide a novel approach to kidney stone prevention and treatment by treating related metabolic conditions that cause kidney stones. Further investigation into these non-coding RNAs will generate novel insights into the mechanisms of renal stone formation and stone-related renal injury and might lead to new strategies for diagnosing and treating this disease.
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Affiliation(s)
| | | | | | | | - Xiaoran Li
- Department of Urology, Institute of Urology, Gansu Nephro-Urological Clinical Center, Key Laboratory of Urological Diseases in Gansu Province, Lanzhou University Second Hospital, Lanzhou 730030, China; (G.W.); (J.M.); (J.B.); (Q.H.)
| | - Zhiping Wang
- Department of Urology, Institute of Urology, Gansu Nephro-Urological Clinical Center, Key Laboratory of Urological Diseases in Gansu Province, Lanzhou University Second Hospital, Lanzhou 730030, China; (G.W.); (J.M.); (J.B.); (Q.H.)
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Xiong P, Zheng YY, Ouyang JM. Carboxylated Pocoa polysaccharides inhibited oxidative damage and inflammation of HK-2 cells induced by calcium oxalate nanoparticles. Biomed Pharmacother 2023; 169:115865. [PMID: 37972469 DOI: 10.1016/j.biopha.2023.115865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/30/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023] Open
Abstract
The inhibitory effects of Chinese medicine Pocoa (PCPs) with different carboxyl group (-COOH) contents on oxidative damage and inflammatory response of renal epithelial cells and the influence of -COOH content in polysaccharides were investigated. HK-2 cell damage model was established by nanocalcium oxalate crystals (nanoCOM), and then PCPs with -COOH contents of 2.56% (PCP0), 7.48% (PCP1), 12.07% (PCP2), and 17.18% (PCP3) were used to protect the cells. PCPs could inhibit the damage of nanoCOM to HK-2 cells, increase cell viability, restore cytoskeleton and morphology, and improve lysosomal integrity. PCPs can reduce the oxidative stress response of nanoCOM to cells, inhibit the opening of mPTP and cell necrotic apoptosis, reduce the level of Ca2+ ions in cells, the production of ATP and MDA, and increase SOD expression. PCPs can also reduce the cellular inflammatory response caused by oxidative damage, and reduce the expression of nitric oxide (NO), inflammatory factors TNF-α, IL-6, IL-1β and MCP-1, as well as the content of inflammasome NLRP3. After protection, PCPs can inhibit the endocytosis of nanoCOM crystals by cells. With the increase in -COOH content in PCPs, its ability to inhibit nanoCOM cell damage, reduce oxidative stress, reduce inflammatory response, and inhibit crystal endocytosis increases, that is, PCP3 with the highest -COOH content, shows the best biological activity. Inhibiting cell damage and inflammation and reducing a large amount of endocytosis of crystals by cells are beneficial to inhibit the formation of kidney stones.
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Affiliation(s)
- Peng Xiong
- Jinan University, Guangzhou 510632, China; Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Guangzhou 510632, China
| | - Yu-Yun Zheng
- Jinan University, Guangzhou 510632, China; Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Jinan University, Guangzhou 510632, China; Institute of Biomineralization and Lithiasis Research, College of Chemistry and Materials Science, Guangzhou 510632, China.
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The advances of calcium oxalate calculi associated drugs and targets. Eur J Pharmacol 2022; 935:175324. [DOI: 10.1016/j.ejphar.2022.175324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/23/2022] [Accepted: 10/11/2022] [Indexed: 11/20/2022]
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Yue X, Piao L, Wang H, Huang Z, Meng X, Sasaki T, Inoue A, Nakamura K, Wan Y, Xu S, Shi GP, Kim W, Murohara T, Kuzuya M, Cheng XW. Cathepsin K Deficiency Prevented Kidney Damage and Dysfunction in Response to 5/6 Nephrectomy Injury in Mice With or Without Chronic Stress. Hypertension 2022; 79:1713-1723. [PMID: 35726642 PMCID: PMC9278705 DOI: 10.1161/hypertensionaha.122.19137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background: Chronic psychological stress is a risk factor for kidney disease, including kidney dysfunction and hypertension. Lysosomal CatK (cathepsin K) participates in various human pathobiologies. We investigated the role of CatK in kidney remodeling and hypertension in response to 5/6 nephrectomy injury in mice with or without chronic stress. Methods: Male 7-week-old WT (wild type; CatK+/+) and CatK-deficient (CatK−/−) mice that were or were not subjected to chronic stress underwent 5/6 nephrectomy. At 8 weeks post-stress/surgery, the stress was observed to have accelerated injury-induced glomerulosclerosis, proteinuria, and blood pressure elevation. Results: Compared with the nonstressed mice, the stressed mice showed increased levels of TLR (Toll-like receptor)-2/4, p22phox, gp91phox, CatK, MMP (matrix metalloproteinase)-2/9, collagen type I and III genes, PPAR-γ (peroxisome proliferator-activated receptor-gamma), NLRP-3 (NOD-like receptor thermal protein domain associated protein 3), p21, p16, and cleaved caspase-8 proteins, podocyte foot process effacement, macrophage accumulation, apoptosis, and decreased levels of Bcl-2 (B cell lymphoma 2) and Sirt1, as well as decreased glomerular desmin expression in the kidneys. These harmful changes were retarded by the genetic or pharmacological inhibition of CatK. Consistently, CatK inhibition ameliorated 5/6 nephrectomy–related kidney injury and dysfunction. In mesangial cells, CatK silencing or overexpression, respectively, reduced or increased the PPAR-γ and cleaved caspase-8 protein levels, providing evidence and a mechanistic explanation of CatK’s involvement in PPAR-γ/caspase-8–mediated cell apoptosis in response to superoxide and stressed serum. Conclusions: These results demonstrate that CatK plays an essential role in kidney remodeling and hypertension in response to 5/6 nephrectomy or stress, possibly via a reduction of glomerular inflammation, apoptosis, and fibrosis, suggesting a novel therapeutic strategy for controlling kidney injury in mice under chronic psychological stress conditions.
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Affiliation(s)
- Xueling Yue
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.).,Department of Community Health Care and Geriatrics (X.Y., Z.H., X.M., M.K.), Nagoya University Graduate School of Medicine, Japan
| | - Limei Piao
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.)
| | - Hailong Wang
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.)
| | - Zhe Huang
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.).,Department of Community Health Care and Geriatrics (X.Y., Z.H., X.M., M.K.), Nagoya University Graduate School of Medicine, Japan
| | - Xiangkun Meng
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.).,Department of Community Health Care and Geriatrics (X.Y., Z.H., X.M., M.K.), Nagoya University Graduate School of Medicine, Japan
| | - Takeshi Sasaki
- Department of Anatomy and Neuroscience, Hamamatsu University School of Medicine, Shizuoka, Japan (T.S.)
| | - Aiko Inoue
- Institute of Innovation for Future Society (A.I., M.K.), Nagoya University Graduate School of Medicine, Japan
| | - Kae Nakamura
- Department of Obstetrics and Gynecology (K.N.), Nagoya University Graduate School of Medicine, Japan
| | - Ying Wan
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.)
| | - Shengnan Xu
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.)
| | - Guo-Ping Shi
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (G.-P.S.)
| | - Weon Kim
- Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University, Seoul, Republic of Korea (W.K.)
| | - Toyoaki Murohara
- Department of Cardiology (T.M.), Nagoya University Graduate School of Medicine, Japan
| | - Masafumi Kuzuya
- Department of Community Health Care and Geriatrics (X.Y., Z.H., X.M., M.K.), Nagoya University Graduate School of Medicine, Japan.,Institute of Innovation for Future Society (A.I., M.K.), Nagoya University Graduate School of Medicine, Japan
| | - Xian Wu Cheng
- Department of Cardiology and Hypertension, Yanbian University Hospital, Yanji, Jilin, People's Republic of China (X.Y., L.P., H.W., Z.H., X.M., Y.W., S.X., X.W.C.)
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Xiong P, Cheng XY, Sun XY, Chen XW, Ouyang JM. Interaction between nanometer calcium oxalate and renal epithelial cells repaired with carboxymethylated polysaccharides. BIOMATERIALS ADVANCES 2022; 137:212854. [PMID: 35929244 DOI: 10.1016/j.bioadv.2022.212854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 04/06/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Injury of renal tubular epithelial cells (HK-2) is an important cause of kidney stone formation. In this article, the repairing effect of polysaccharide (PCP0) extracted from the traditional Chinese medicine Poria cocos and its carboxymethylated derivatives on damaged HK-2 cells was studied, and the differences in adhesion and endocytosis of the cells to nanometer calcium oxalate monohydrate (COM) before and after repair were explored. METHODS Sodium oxalate (2.8 mmol/L) was used to damage HK-2 cells to establish a damage model, and then Poria cocos polysaccharides (PCPs) with different carboxyl (COOH) contents were used to repair the damaged cells. The changes in the biochemical indicators of the cells before and after the repair and the changes in the ability to adhere to and internalize nano-COM were detected. RESULTS The natural PCPs (PCP0, COOH content = 2.56%) were carboxymethylated, and three carboxylated modified Poria cocos with 7.48% (PCP1), 12.07% (PCP2), and 17.18% (PCP3) COOH contents were obtained. PCPs could repair the damaged HK-2 cells, and the cell viability was enhanced after repair. The cell morphology was gradually repaired, the proliferation and healing rate were increased. The ROS production was reduced, and the polarity of the mitochondrial membrane potential was restored. The level of intracellular Ca2+ ions decreased, and the autophagy response was weakened. CONCLUSION The cells repaired by PCPs inhibited the adhesion to nano-COM and simultaneously promoted the endocytosis of nano-COM. The endocytic crystals mainly accumulated in the lysosome. Inhibiting adhesion and increasing endocytosis could reduce the nucleation, growth, and aggregation of cell surface crystals, thereby inhibiting the formation of kidney stones. With the increase of COOH content in PCPs, its ability to repair damaged cells, inhibit crystal adhesion, and promote crystal endocytosis all increased, that is, PCP3 with the highest COOH content showed the best ability to inhibit stone formation.
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Affiliation(s)
- Peng Xiong
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Xiao-Yan Cheng
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Xin-Yuan Sun
- Department of Urology, Guangzhou Institute of Urology, Guangdong Key Laboratory of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong 510230, China
| | - Xue-Wu Chen
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China.
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Song Y, Yang X, Zhang X, Zhu J, Chen Y, Gao F, Zhang H, Han Y, Weng Q, Yuan Z. Seasonal expression of extracellular signal regulated kinases in the colon of wild ground squirrels (Spermophilus dauricus). Mol Biol Rep 2022; 49:2209-2215. [PMID: 35040005 DOI: 10.1007/s11033-021-07042-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 12/01/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND The purpose of the experiment was to explore the localization and seasonal expression of extracellular signal regulated kinase (ERK) in the colonic tissue of wild ground squirrels (Spermophilus dauricus). METHODS AND RESULTS Hematoxylin-eosin staining, immunohistochemistry, real-time quantitative PCR and Western blotting were used in this experiment. The histological results showed that the diameter of the colon lumen enlarged and the number of glandular cells increased in the non-breeding season. It was found in the immunochemical results that both ERK1/2 and pERK1/2 were expressed in the cytoplasm of goblet cells and intestinal epithelial cells, while pERK1/2 was also expressed in the nucleus of them. The immune localization of both was more obvious in the non-breeding season, especially in intestinal epithelial cells. Real-time quantitative PCR and Western blotting showed that ERK1/2 and pERK1/2 were seasonally highly expressed in the non-breeding season. CONCLUSIONS The expression of ERK1/2 and pERK1/2 was seasonal changes and had significant increases in the non-breeding season. This study revealed that ERK1/2 had potential roles in the colon to the adaptation of seasonal changes in wild ground squirrels.
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Affiliation(s)
- Yue Song
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Xiaoying Yang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Xueying Zhang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Jueyu Zhu
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Yixin Chen
- School of Information Science and Technology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Fuli Gao
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Haolin Zhang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Yingying Han
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Qiang Weng
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Zhengrong Yuan
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China.
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Ruiz-Ramirez C, Antaño-Martinez AR, Robles J, Gallegos-Corona MA, Gallegos-Reyes MA, Avila EE, Martinez-Alfaro M. Correlation between urinary KIM-1 and kidney protein expression of p-ERK following damage in rats exposed to gentamicin or lead acetate. J Biochem Mol Toxicol 2021; 35:e22875. [PMID: 34350654 DOI: 10.1002/jbt.22875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 07/19/2021] [Accepted: 07/24/2021] [Indexed: 11/11/2022]
Abstract
Kidney injury molecule-1 (KIM-1) is a membrane receptor upregulated in the proximal tubule cells following various types of kidney injuries. Notably, studies have suggested a correlation between KIM-1 expression and extracellular signal-regulated kinase (ERK) activation. In this study, we aimed to investigate the association between the kidney overexpression pattern of cytoplasmic phosphorylated-ERK (p-ERK) protein and increased urinary KIM-1 levels in rats exposed to gentamicin or lead acetate, both at the end of toxic exposure and after a 4-week recovery period. Although other proteins were evaluated, only kidney overexpression of cytoplasmic p-ERK protein correlated with increased urinary KIM-1 levels. For both toxic substances, the increased urinary KIM-1 levels corresponded with kidney inflammation. Our results suggest that KIM-1 and p-ERK share a common mechanism in kidney injury mediated by both toxic substances that induce proximal tubule damage.
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Affiliation(s)
| | | | - Juvencio Robles
- Pharmacy Department, DCNE, Universidad de Guanajuato, Guanajuato, Mexico
| | | | | | - Eva E Avila
- Biology Department, DCNE, Universidad de Guanajuato, Guanajuato, Mexico
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