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Hong SY, Miao LT, Yang YY, Wang SG. Expression profiles of urine exosomal tRNA-derived small RNAs and their potential roles in calcium oxalate stone disease. Ann Med Surg (Lond) 2024; 86:5802-5810. [PMID: 39359758 PMCID: PMC11444539 DOI: 10.1097/ms9.0000000000002563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2024] [Accepted: 09/02/2024] [Indexed: 10/04/2024] Open
Abstract
Background and objective Exosomes have been confirmed to be implicated in the pathogenesis of calcium oxalate (CaOx) stones. tRNA-derived small RNAs (tsRNAs) are among the oldest small RNAs involved in exosome-mediated intercellular communication, yet their role in kidney stones remains unexplored. This pilot study aimed to identify differentially expressed tsRNAs (DEtsRNAs) in urine exosomes between CaOx stone patients and healthy controls and explore their potential roles in nephrolithiasis. Method First-morning urine samples were collected from three CaOx stone patients and three healthy controls. Urinary exosomes were isolated and analyzed by high-throughput sequencing to generate the expression profiles of tsRNAs and detect DEtsRNAs. Predicted target genes of DEtsRNAs were subjected to functional enrichment analysis. The authors also combined the public dataset GSE73680 to investigate how DEtsRNAs were related to stone formation. Results Four DEtsRNAs were significantly upregulated in CaOx stone patients compared to healthy controls. tRF-Lys-TTT-5005c was the most elevated, followed by tRF-Lys-CTT-5006c, tRF-Ala-AGC-5017b, and tRF-Gly-CCC-5004b. Bioinformatics analysis indicated that these four types of DEtsRNAs might serve distinct biological functions. Combined with data mining from the public dataset GSE73680, the authors assumed that exosomes carrying tRF-Lys-TTT-5005c and tRF-Lys-CTT-5006c could inhibit the expression of SMAD6, FBN1, and FZD1, thereby activating the BMP signaling pathway, which might induce an osteogenic-like transformation in target cells, resulting in the formation of Randall's plaques and CaOx stones. Conclusion The authors' findings shed light on the potential roles of tsRNAs in the pathogenesis of CaOx stone disease, highlighting exosomal DEtsRNAs as promising diagnostic biomarkers and therapeutic targets in nephrolithiasis.
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Affiliation(s)
| | | | - Yuan-Yuan Yang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shao-Gang Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Liu M, Liu Z, Huang F, Chen H, Yang Z, Zhu Z. A high-calcium environment induced ectopic calcification of renal interstitial fibroblasts via TFPI-2-DCHS1-ALP/ENPP1 axis to participate in Randall's plaque formation. Urolithiasis 2024; 52:122. [PMID: 39196305 DOI: 10.1007/s00240-024-01622-y] [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: 06/12/2024] [Accepted: 08/17/2024] [Indexed: 08/29/2024]
Abstract
Randall's plaques (RP) serve as anchoring sites for calcium oxalate (CaOx) stones, but the underlying mechanism remains unclear. Renal interstitium with a high-calcium environment is identified as pathogenesis of RP formation where the role of human renal interstitial fibroblasts (hRIFs) was highlighted. Our study aims to elucidate the potential mechanism by which a high-calcium environment drives ectopic calcification of hRIFs to participate in RP formation. Alizarin Red staining demonstrated calcium nodules in hRIFs treated with high-calcium medium. Utilizing transcriptome sequencing, tissue factor pathway inhibitor-2 (TFPI-2) was found to be upregulated in high-calcium-induced hRIFs and RP tissues, and TFPI-2 promoted high-calcium-induced calcification of hRIFs. Subsequently, the downstream regulator of TFPI2 was screened by transcriptome sequencing analysis of hRIFs with TFPI-2 knockdown or overexpressed. Dachsous Cadherin Related 1 (DCHS1) knockdown was identified to suppress the calcification of hRIFs enhanced by TFPI-2. Further investigation revealed that TFPI-2/DCHS1 axis promoted high-calcium-induced calcification of hRIFs via disturbing the balance of ENPP1/ALP activities, but without effect on the canonical osteogenic markers, such as osteopontin (OPN), osteogenic factors runt-related transcription factor 2 (RUNX2), bone morphogenetic protein 2 (BMP2). In summary, our study mimicked the high-calcium environment observed in CaOx stone patients with hypercalciuria, and discovered that the high-calcium drove ectopic calcification of hRIFs via a novel TFPI-2-DCHS1-ALP/ENPP1 pathway rather than adaption of osteogenic phenotypes to participate in RP formation.
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Affiliation(s)
- Minghui Liu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Zhi Liu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- Department of Urology, The Second Affiliated Hospital of Guizhou Medical University, Kaili, 556000, Guizhou, China
| | - Fang Huang
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- Department of Critical Care Medicine, Hunan Provincial Clinical Research Center for Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Hequn Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Zhongqing Yang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
| | - Zewu Zhu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
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Yang Y, Hong S, Xu J, Li C, Wang S, Xun Y. Enterobacter cloacae: a villain in CaOx stone disease? Urolithiasis 2022; 50:177-188. [PMID: 35124708 PMCID: PMC8956555 DOI: 10.1007/s00240-022-01311-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 01/21/2022] [Indexed: 12/20/2022]
Abstract
To explore the roles microbiome of urinary tract played in calcium oxalate stones (CaOx) formation, we collected two sides’ pelvis urine of patients with unilateral CaOx stones to set self-control to diminish the influence of systemic factors. Patients with unilateral CaOx stones were recruited in our study according to strict criteria. 16S rRNA gene sequencing was applied to every pair of pelvis urine. Bacterial genome sequencing of Enterobacter cloacae was conducted and bioinformatic analysis was applied to explore the possible pathways of Enterobacter cloacae inducing CaOx stones formation. In vivo experiments were conducted to validate our claims. Von Kossa staining, TUNEL assay and Western Blot were applied to SD rats exploring the mechanism of stone formation. We found 26 significantly different bacteria between stone sides and non-stone sides’ pelvis urine, among which Enterobacter cloacae ranked the most different. Bacterial genome sequencing of Enterobacter cloacae revealed that its virulence factors included Flagellin, LPS and Fimbrial. GO and KEGG analysis revealed it probably induced CaOx stone formation via ion binging and signaling transduction pathways. The results of animal experiments indicated that Glyoxylic Acid could promote apoptosis and crystal depositions of kidney comparing with control group while pre-injected with Enterobacter cloacae could apparently compound the effects. While Western Blot demonstrated that Glyoxylic Acid or Enterobacter cloacae could increase the expression of IL-6, Mcp-1, BMP2 and OPN in rats’ kidney, Glyoxylic Acid and Enterobacter cloacae together could aggravate these increases. These findings indicated that Enterobacter cloacae might play important roles in CaOx stones formation. However, this study is just a preliminary exploration; further studies still need to be conducted.
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Affiliation(s)
- Yuanyuan Yang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Senyuan Hong
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Jinzhou Xu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Cong Li
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Shaogang Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Yang Xun
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
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Bai S, Yang Y, Ma X, Liao X, Wang R, Zhang L, Li S, Luo X, Lu L. Dietary calcium requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 days of age. J Anim Sci Biotechnol 2022; 13:11. [PMID: 35109932 PMCID: PMC8812165 DOI: 10.1186/s40104-021-00652-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 11/16/2021] [Indexed: 11/13/2022] Open
Abstract
Background The current calcium (Ca) recommendation for broilers is primarily based on studies conducted more than 30 years ago with birds of markedly different productive potentials from those which exist today. And the response indicators in these studies are mainly growth performance and bone ash percentage. Therefore, the present study was carried out to investigate the effect of dietary Ca level on growth performance, serum parameters, bone characteristics and Ca metabolism-related gene expressions, so as to estimate dietary Ca requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 days of age. Methods A total of 420 1-day-old Arbor Acres male broilers were randomly assigned to 1 of 7 treatments with 6 replicates (10 birds per cage) and fed the corn-soybean meal diets containing 0.60%, 0.70%, 0.80%, 0.90%, 1.00%, 1.10% or 1.20% Ca for 21 days. Each diet contained the constant non-phytate phosphorus content of about 0.39%. Results The average daily gain decreased linearly (P < 0.001) as dietary Ca level increased. The serum and tibia alkaline phosphatase (ALP) activities, tibia bone mineral density (BMD), middle toe BMD, tibia ash percentage, tibia breaking strength, and tibia ALP protein expression level were affected (P < 0.05) by dietary Ca level, and showed significant quadratic responses (P < 0.02) to dietary Ca levels. The estimates of dietary Ca requirements were 0.80 to 1.00% based on the best fitted broken-line or quadratic models (P < 0.03) of the above serum and bone parameters, respectively. Conclusions The results from the present study indicate that the Ca requirements would be about 0.60% to obtain the best growth rate, and 1.00% to meet all of the Ca metabolisms and bone development of broilers fed a conventional corn-soybean meal diet from 1 to 21 days of age.
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Affiliation(s)
- Shiping Bai
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.,Poultry Mineral Nutrition Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, 225000, China.,Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Yunfeng Yang
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xuelian Ma
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xiudong Liao
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Runlian Wang
- Department of Animal Science, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Liyang Zhang
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Sufen Li
- Department of Animal Science, Hebei Normal University of Science and Technology, Qinhuangdao, 066004, China
| | - Xugang Luo
- Poultry Mineral Nutrition Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, 225000, China.
| | - Lin Lu
- Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Xun Y, Zhou P, Yang Y, Li C, Zhang J, Hu H, Qin B, Zhang Z, Wang Q, Lu Y, Wang S. Role of Nox4 in High Calcium-Induced Renal Oxidative Stress Damage and Crystal Deposition. Antioxid Redox Signal 2022; 36:15-38. [PMID: 34435888 DOI: 10.1089/ars.2020.8159] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Aims: We aimed at exploring the role of nicotinamide adenine dinucleotide phosphate oxidase subunit 4 (Nox4) in the regulation of hypercalciuria-induced renal oxidative damage and crystal depositions. Results: High calcium activated Nox4 expression through protein kinase C (PKC). Downregulation of Nox4 expression attenuated hypercalciuria-induced osteoblast-associated protein expression, oxidative stress injury, and crystal deposition in rat kidneys of 1,25-dihydroxyvitamin D3 (VitD) urolithiasis model. Further, calcium-induced activation of mitogen-activated protein kinase (MAPK), overexpression of osteoblast-associated protein, oxidative stress injury, apoptosis, and calcium salt deposition in normal rat kidney epithelial-like (NRK-52E) cells were reversed by downregulating Nox4 expression but were enhanced by upregulating Nox4 expression in vitro. Moreover, calcium-induced increases of osteoblast-associated protein expression were attenuated by the c-Jun-N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK) inhibitors. Innovation: Our results demonstrated the effect of Nox4 in the pathological process of kidney stones in in vitro and in vivo studies for the first time. Calcium aggravates renal oxidative stress injury and crystal deposition by activating the Nox4-related reactive oxygen species (ROS)-ERK/JNK pathway in the rat kidney. This study is expected to provide a new theoretical basis for the prevention and treatment of kidney stones. Conclusion: Nox4-derived ROS induced by calcium through PKC caused oxidative stress damage and apoptosis in renal tubular epithelial cells; in addition, Nox4-derived ROS induced by calcium mediated abnormal activation of the bone morphogenetic protein 2 (BMP2) signaling pathway through the MAPK signaling pathway, which induced renal tubular epithelial cells to transdifferentiate into osteoblast-like cells, resulting in the formation of a kidney stone. Antioxid. Redox Signal. 36, 15-38.
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Affiliation(s)
- Yang Xun
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Peng Zhou
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Yuanyuan Yang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Cong Li
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Jiaqiao Zhang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Henglong Hu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Baolong Qin
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Zongbiao Zhang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Qing Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Yuchao Lu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Shaogang Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
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Randall's plaque and calcium oxalate stone formation: role for immunity and inflammation. Nat Rev Nephrol 2021; 17:417-433. [PMID: 33514941 DOI: 10.1038/s41581-020-00392-1] [Citation(s) in RCA: 146] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2020] [Indexed: 01/30/2023]
Abstract
Idiopathic calcium oxalate (CaOx) stones often develop attached to Randall's plaque present on kidney papillary surfaces. Similar to the plaques formed during vascular calcification, Randall's plaques consist of calcium phosphate crystals mixed with an organic matrix that is rich in proteins, such as inter-α-trypsin inhibitor, as well as lipids, and includes membrane-bound vesicles or exosomes, collagen fibres and other components of the extracellular matrix. Kidney tissue surrounding Randall's plaques is associated with the presence of classically activated, pro-inflammatory macrophages (also termed M1) and downregulation of alternatively activated, anti-inflammatory macrophages (also termed M2). In animal models, crystal deposition in the kidneys has been associated with the production of reactive oxygen species, inflammasome activation and increased expression of molecules implicated in the inflammatory cascade, including osteopontin, matrix Gla protein and fetuin A (also known as α2-HS-glycoprotein). Many of these molecules, including osteopontin and matrix Gla protein, are well known inhibitors of vascular calcification. We propose that conditions of urine supersaturation promote kidney damage by inducing the production of reactive oxygen species and oxidative stress, and that the ensuing inflammatory immune response promotes Randall's plaque initiation and calcium stone formation.
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Zhu Z, Huang F, Xia W, Zeng H, Gao M, Li Y, Zeng F, He C, Chen J, Chen Z, Li Y, Cui Y, Chen H. Osteogenic Differentiation of Renal Interstitial Fibroblasts Promoted by lncRNA MALAT1 May Partially Contribute to Randall's Plaque Formation. Front Cell Dev Biol 2021; 8:596363. [PMID: 33505960 PMCID: PMC7829506 DOI: 10.3389/fcell.2020.596363] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/10/2020] [Indexed: 12/29/2022] Open
Abstract
Background The current belief is that Randall's plaques (RP) constitute a nidus for the formation of idiopathic calcium oxalate stones, but the upstream events in RP formation remain unclear. The present study aimed to investigate whether RP formation shares similarities with biomineralization and to illustrate the potential role played by the lncRNA MALAT1 in osteogenic differentiation of human renal interstitial fibroblasts (hRIFs). Materials and Methods Biomineralization and MALAT1 expression were assessed in RP, and hRIFs were isolated and induced under osteogenic conditions for further experiments. The transcription initiation and termination sites in MALAT1 were identified by 5' and 3' RACE. RNA immunoprecipitation assays and luciferase assays were used to validate the interactions among MALAT1, Runx2 and miRNAs. Results Upregulated expression of osteogenic markers and MALAT1 was observed in RP and hRIFs induced with osteogenic medium. Biomineralization in RP and calcium phosphate (CaP) deposits in induced hRIFs were further verified by electron microscopy. Furthermore, overexpression of MALAT1 promoted the osteogenic phenotype of hRIFs, while treatment with a miR-320a-5p mimic and knockdown of Runx2 significantly suppressed the osteogenic phenotype. Further analysis showed that MALAT1 functioned as a competing endogenous RNA to sponge miR-320a-5p, leading to upregulation of Runx2 and thus promoting osteogenic differentiation of hRIFs. Conclusion Ectopic calcification and MALAT1 partially contributed to the formation of RP, in which MALAT1 might promote Runx2 expression to regulate osteogenic differentiation of hRIFs by sponging miRNA-320a-5p. The current study sheds new light on the lncRNA-directed mechanism of RP formation via a process driven by osteogenic-like cells.
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Affiliation(s)
- Zewu Zhu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Fang Huang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Weiping Xia
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Huimin Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Meng Gao
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yongchao Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Feng Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Cheng He
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Jinbo Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiyong Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yang Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yu Cui
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Hequn Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
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Cui Y, Zeng F, Zhu Z, Huang F, Chen J, He C, Li Y, Chen Z, Yang Z, Zu X, Chen H. Suppression of osteogenic-like differentiation in human renal interstitial fibroblasts by miRNA-410-3p through MSX2. Transl Androl Urol 2020; 9:2082-2093. [PMID: 33209671 PMCID: PMC7658140 DOI: 10.21037/tau-20-607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background The aim of this stay was to determine the effect of calcium ions in promoting osteogenic-like differentiation in human renal interstitial fibroblasts (hRIFs). The role of miRNA-410-3p in upregulating Msh homeobox 2 (MSX2) level in hRIFs was also investigated. Methods Quantitative polymerase chain reaction (qPCR) analysis was used to assess the expression levels of miRNA-410-3p in Randall’s plaque (RP) and normal renal papillary (nRP) tissues. Furthermore, the expression levels of osteogenesis-related protein in the RP and nRP tissues were assessed with qPCR and immunohistochemistry (IHC). hRIFs were cultured from isolated human kidney papilla before treatment with calcium chloride or osteogenic medium, and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed at 1, 5, 9, and 14 days post-treatment. Alizarin red staining was used to estimate the deposits of calcium aggregates. After the overexpression or knockdown of miRNA-410-3p, we evaluated the changes in the osteogenic-like differentiation and osteogenesis-related protein by alizarin red staining and qPCR, respectively. A binding relationship between miRNA-410-3p and MSX2 was established through a dual-luciferase reporter gene assay. Rescue experiments demonstrated that miRNA-410-3p regulated the osteogenic-like differentiation by targeting MSX2. Results miRNA-410-3p levels were lower in RP tissue than in control nRP tissues. qPCR and IHC showed that the level of runt-related transcription factor 2 (Runx2), osteocalcin (OCN), and osteopontin (OPN) were higher in RP tissues. The calcium deposition of hRIFs showed a time-dependent trend when treated with osteogenic medium or calcium chloride. The overexpression of miRNA-410-3p downregulated the levels of osteogenesis-related expression and attenuated mineralization. The knockdown of miRNA-410-3p yielded the opposite trend. Dual-luciferase reporter gene assay and rescue experiments indicated that miRNA-410-3p could target MSX2, while the overexpression of MSX2 reversed the effects of miRNA-410-3p on osteogenic-like differentiation. Conclusions The current findings suggest that calcium ions could promote the osteogenic-like differentiation of hRIFs and miRNA-410-3p regulates hRIFs osteogenic-like differentiation by inhibiting MSX2.
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Affiliation(s)
- Yu Cui
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Feng Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Zewu Zhu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Fang Huang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Jinbo Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Cheng He
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yang Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiyong Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhongqing Yang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Xiongbing Zu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Hequn Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
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Ricci B, Tycksen E, Celik H, Belle JI, Fontana F, Civitelli R, Faccio R. Osterix-Cre marks distinct subsets of CD45- and CD45+ stromal populations in extra-skeletal tumors with pro-tumorigenic characteristics. eLife 2020; 9:e54659. [PMID: 32755539 PMCID: PMC7428306 DOI: 10.7554/elife.54659] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 07/27/2020] [Indexed: 01/08/2023] Open
Abstract
Cancer-associated fibroblasts (CAFs) are a heterogeneous population of mesenchymal cells supporting tumor progression, whose origin remains to be fully elucidated. Osterix (Osx) is a marker of osteogenic differentiation, expressed in skeletal progenitor stem cells and bone-forming osteoblasts. We report Osx expression in CAFs and by using Osx-cre;TdTomato reporter mice we confirm the presence and pro-tumorigenic function of TdTOSX+ cells in extra-skeletal tumors. Surprisingly, only a minority of TdTOSX+ cells expresses fibroblast and osteogenic markers. The majority of TdTOSX+ cells express the hematopoietic marker CD45, have a genetic and phenotypic profile resembling that of tumor infiltrating myeloid and lymphoid populations, but with higher expression of lymphocytic immune suppressive genes. We find Osx transcript and Osx protein expression early during hematopoiesis, in subsets of hematopoietic stem cells and multipotent progenitor populations. Our results indicate that Osx marks distinct tumor promoting CD45- and CD45+ populations and challenge the dogma that Osx is expressed exclusively in cells of mesenchymal origin.
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Affiliation(s)
- Biancamaria Ricci
- Department of Orthopedics, Washington University School of MedicineSt. LouisUnited States
| | - Eric Tycksen
- Genome Technology Access Center, Department of Genetics, Washington University School of MedicineSt. LouisUnited States
| | - Hamza Celik
- Department of Medicine, Division of Oncology, Washington University School of MedicineSt. LouisUnited States
| | - Jad I Belle
- Department of Medicine, Division of Oncology, Washington University School of MedicineSt. LouisUnited States
| | - Francesca Fontana
- Department of Medicine, Division of Oncology, Washington University School of MedicineSt. LouisUnited States
| | - Roberto Civitelli
- Department of Medicine, Division of Bone and Mineral Diseases, Washington University School of MedicineSt. LouisUnited States
| | - Roberta Faccio
- Department of Orthopedics, Washington University School of MedicineSt. LouisUnited States
- Shriners Children HospitalSt. LouisUnited States
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10
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Fang N, Hu C, Sun W, Xu Y, Gu Y, Wu L, Peng Q, Reiter RJ, Liu L. Identification of a novel melatonin-binding nuclear receptor: Vitamin D receptor. J Pineal Res 2020; 68:e12618. [PMID: 31631405 DOI: 10.1111/jpi.12618] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 02/06/2023]
Abstract
Previous studies confirmed that melatonin regulates Runx2 expression but the mechanism is unclear. There is a direct interaction between Runx2 and the vitamin D receptor (VDR). Herein, we observed a direct interaction between melatonin and the VDR but not Runx2 using isothermal titration calorimetry. Furthermore, this direct binding was detected only in the C-terminal ligand binding domain (LBD) of the VDR but not in the N-terminal DNA-binding domain (DBD) or the hinge region. Spectrophotometry indicated that melatonin and vitamin D3 (VD3) had similar uptake rates, but melatonin's uptake was significantly inhibited by VD3 until the concentration of melatonin was obviously higher than that of VD3 in a preosteoblastic cell line MC3T3-E1. GST pull-down and yeast two-hybrid assay showed that the interactive smallest fragments were on the 319-379 position of Runx2 and the N-terminus 110-amino acid DBD of the VDR. Electrophoretic mobility shift assay (EMSA) demonstrated that Runx2 facilitated the affinity between the VDR and its specific DNA substrate, which was further documented by a fluorescent EMSA assay where Cy3 labeled Runx2 co-localized with the VDR-DNA complex. Another fluorescent EMSA assay confirmed that the binding of the VDR to Runx2 was significantly enhanced with an increasing concentrations of the VDR, especially in the presence of melatonin; it was further documented using a co-immunoprecipitation assay that this direct interaction was markedly enhanced by melatonin treatment in the MC3T3-E1 cells. Thus, the VDR is a novel melatonin-binding nuclear receptor, and melatonin indirectly regulates Runx2 when it directly binds to the LBD and the DBD of the VDR, respectively.
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Affiliation(s)
- Nan Fang
- Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chunyi Hu
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Wenqi Sun
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Ying Xu
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yeqi Gu
- Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Le Wu
- Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qing Peng
- Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Russel J Reiter
- Department of Cellular & Structural Biology, UT Health Science Center, San Antonio, TX, USA
| | - Lifeng Liu
- Department of Trauma Orthopaedics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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11
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Mohamad N, Nabih ES, Zakaria ZM, Nagaty MM, Metwaly RG. Insight into the possible role of miR-214 in primary osteoporosis via osterix. J Cell Biochem 2019; 120:15518-15526. [PMID: 31056782 DOI: 10.1002/jcb.28818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/05/2019] [Accepted: 04/11/2019] [Indexed: 12/16/2022]
Abstract
Osteoporosis is a bone disease characterized by chronic pain and recurrent fractures. Osterix is a transcription factor regulating bone formation. miR-214 was found to have a role in skeletogenesis. Our goal was to investigate the possible role of miR-214 in primary osteoporosis through osterix. Their expression was determined in bone samples obtained from primary osteoporotic patients (n = 26) and age- and sex-matched controls (n = 14). Additionally, their expression was correlated to the laboratory and clinical parameters of the study participants. Differential expression of osterix and miR-214 was detected in the osteoporotic group compared to controls. While miR-214 was significantly higher, osterix was significantly lower. In primary osteoporotic patients, relative quantification value of osterix was positively correlated with sex, body mass index, and ionized calcium and negatively correlated with miR-214 and C-reactive protein. Thus, the role of miR-214 in primary osteoporosis could be through inhibiting osterix expression in bones and therefore both miR-214 and osterix could be targets for future therapeutic intervention.
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Affiliation(s)
- Nesma Mohamad
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Enas S Nabih
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Zeiad M Zakaria
- Orthopedic Surgery and Traumatology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Magda M Nagaty
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Radwan G Metwaly
- Orthopedic Surgery and Traumatology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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12
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Wu Z, Wu H, Md S, Yu G, Habib SL, Li B, Li J. Tsc1 ablation in Prx1 and Osterix lineages causes renal cystogenesis in mouse. Sci Rep 2019; 9:837. [PMID: 30696882 PMCID: PMC6351533 DOI: 10.1038/s41598-018-37139-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 11/28/2018] [Indexed: 02/02/2023] Open
Abstract
Tuberous Sclerosis Complex (TSC) is caused by mutations in TSC1 or TSC2, which encode negative regulators of the mTOR signaling pathway. The renal abnormalities associated with TSC include angiomyolipoma, cysts, and renal cell carcinoma. Here we report that specific ablation of Tsc1 using the mesenchymal stem cell-osteoblast lineage markers induced cystogenesis in mice. Using Rosa-tdTomato mice, we found that Prx1- or Dermo1-labeled cells were present in the nephron including glomerulus but they were not stained by markers for podocytes, mesangial cells, endothelial cells, or proximal or loop of Henle tubular cells, while Osx is known to label tubular cells. Tsc1 deficiency in Prx1 lineage cells caused development of mild cysts that were positive only for Tamm-Horsfall protein (THP), a loop of Henle marker, while Tsc1 deficiency in Osx lineage cells caused development of cysts that were positive for Villin, a proximal tubular cell marker. On the other hand, Tsc1 deficiency in the Dermo1 lineage did not produce detectable phenotypical changes in the kidney. Cyst formation in Prx1-Cre; Tsc1f/f and Osx-Cre; Tsc1f/f mice were associated with increase in both proliferative and apoptotic cells in the affected tissue and were largely suppressed by rapamycin. These results suggest that Prx1 and Osx lineages cells may contribute to renal cystogenesis in TSC patients.
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Affiliation(s)
- Zhixiang Wu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hongguang Wu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Shafiquzzaman Md
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Guo Yu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Samy L Habib
- Department of Cellular and Structural Biology, South Texas Veterans Health Care System, San Antonio, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Baojie Li
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jing Li
- Department of Ophthalmology, XinHua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Fu X, Yang H, Zhang H, Wang G, Liu K, Gu Q, Tao Y, Chen G, Jiang X, Li G, Gu Y, Shi Q. Improved osteogenesis and upregulated immunogenicity in human placenta-derived mesenchymal stem cells primed with osteogenic induction medium. Stem Cell Res Ther 2016; 7:138. [PMID: 27649692 PMCID: PMC5028975 DOI: 10.1186/s13287-016-0400-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 06/18/2016] [Accepted: 08/30/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) are widely used in cell-based therapy owing to their multilineage potential and low immunogenicity. However, low differentiation efficiency and unpredictable immunogenicity of allogeneic MSCs in vivo limit their success in therapeutic treatment. Herein, we evaluated the differentiation potential and immunogenicity of human placenta-derived MSCs manipulated with osteogenic priming and dedifferentiation process. METHODS MSCs from human placentas were subjected to osteogenic induction and then cultivated in osteogenic factor-free media; the obtained cell population was termed dedifferentiated mesenchymal stem cells (De-MSCs). De-MSCs were induced into osteo-, chondro- and adipo-differentiation in vitro. Cell proliferation was quantified by a Cell-Counting Kit-8 or tritiated thymidine ([(3)H]-TdR) incorporation. Meanwhile, the osteogenesis of De-MSCs in vivo was assayed by real-time PCR and histological staining. The expressions of stem cell markers and co-stimulatory molecules on De-MSCs and lymphocytes from primed BALB/c mouse with De-MSCs were determined by flow cytometry. RESULTS De-MSCs exhibited some properties similar to MSCs including multiple differentiation potential and hypoimmunogenicity. Upon re-osteogenic induction, De-MSCs exhibited higher differentiation capability than MSCs both in vitro and in vivo. Of note, De-MSCs had upregulated immunogenicity in association with their osteogenesis, reflected by the alternated expressions of co-stimulatory molecules on the surface and decreased suppression on T cell activation. Functionally, De-MSC-derived osteoblasts could prime lymphocytes of peripheral blood and spleen in BALB/c mice in vivo. CONCLUSIONS These data are of great significance for the potential application of De-MSCs as an alternative resource for regenerative medicine and tissue engineering. In order to avoid being rejected by the host during allogeneic De-MSC therapy, we suggest that immune intervention should be considered to boost the immune acceptance and integration because of the upregulated immunogenicity of De-MSCs with redifferentiation in clinical applications.
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Affiliation(s)
- Xuejie Fu
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Huilin Yang
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Hui Zhang
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Guichao Wang
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Ke Liu
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Qiaoli Gu
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Yunxia Tao
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China
| | - Guangcun Chen
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China
| | - Xiaohua Jiang
- Epithelial Cell Biology Research Center, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, People's Republic of China
| | - Gang Li
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Yanzheng Gu
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China. .,Key Laboratory of Stem Cell of Jiangsu Province, Institute of Medical Biotechnology, Soochow University, No.188 Shizi Street, Suzhou, 215006, People's Republic of China.
| | - Qin Shi
- Orthopedic Department, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, Suzhou, 215006, People's Republic of China.
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14
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Balogh E, Tóth A, Tolnai E, Bodó T, Bányai E, Szabó DJ, Petrovski G, Jeney V. Osteogenic differentiation of human lens epithelial cells might contribute to lens calcification. Biochim Biophys Acta Mol Basis Dis 2016; 1862:1724-31. [PMID: 27318027 DOI: 10.1016/j.bbadis.2016.06.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/24/2016] [Accepted: 06/14/2016] [Indexed: 01/14/2023]
Abstract
Calcification of the human lens has been described in senile cataracts and in young patients with congenital cataract or chronic uveitis. Lens calcification is also a major complication of cataract surgery and plays a role in the opacification of intraocular lenses. A cell-mediated process has been suggested in the background of lens calcification, but so far the exact mechanism remained unexplored. Lens calcification shares remarkable similarities with vascular calcification; in both pathological processes hydroxyapatite accumulates in the soft tissue. Vascular calcification is a regulated, cell-mediated process in which vascular cells undergo osteogenic differentiation. Our objective was to investigate whether human lens epithelial cells (HuLECs) can undergo osteogenic transition in vitro, and whether this process contributes to lens calcification. We used inorganic phosphate (Pi) and Ca to stimulate osteogenic differentiation of HuLECs. Osteogenic stimuli (2.5mmol/L Pi and 1.2mmol/L Ca) induced extracellular matrix mineralization and Ca deposition in HuLECs with the critical involvement of active Pi uptake. Osteogenic stimuli almost doubled mRNA expressions of osteo-/chondrogenic transcription factors Runx2 and Sox9, which was accompanied by a 1.9-fold increase in Runx2 and a 5.5-fold increase in Sox9 protein expressions. Osteogenic stimuli induced mRNA and protein expressions of alkaline phosphatase and osteocalcin in HuLEC. Ca content was higher in human cataractous lenses, compared to non-cataractous controls (n=10). Osteocalcin, an osteoblast-specific protein, was expressed in 2 out of 10 cataractous lenses. We conclude that osteogenic stimuli induce osteogenic differentiation of HuLECs and propose that this mechanism might play a role in lens calcification.
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Affiliation(s)
- Enikő Balogh
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Andrea Tóth
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Emese Tolnai
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tímea Bodó
- Department of Neurology, Bethesda Children's Hospital, Budapest, Hungary
| | - Emese Bányai
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Dóra Júlia Szabó
- Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Goran Petrovski
- Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary; Center of Eye Research, Department of Ophthalmology, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Viktória Jeney
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
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15
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Abstract
Bu-Shen-Jian-Pi-Yi-Qi therapy, which refers to reinforcing kidney, regulating qi, and invigorating spleen, is a traditional Chinese medicine, and we investigated its efficacy in treatment of alcohol-induced osteoporosis and its underlying mechanism. Forty adult male Sprague-Dawley rats were randomly assigned into alcohol-supplemented group, JIAN-GU-LING (JGL) group, calcium D3 + alfacalcidol group, and sham-treated group. Bone mineral density (BMD), bone mineral content (BMC), and bone biomechanical properties were assessed. Biochemical analyses of serum and urine specimens were detected. Reverse transcription-polymerase chain reaction was used to detect the mRNA level of vitamin D receptor (VDR). There were markedly lower bone metabolic markers and biomechanical properties in alcohol-supplemented group compared with sham-treated group (all P < 0.05). BMD, BMC, 25(OH)D3, and 1,25(OH)2D3 were elevated in JGL group relative to calcium D3 + alfacalcidol group (all P < 0.05). U-Ca/Cr and U-P/Cr in JGL group were higher than those in the calcium D3 + alfacalcidol group (all P < 0.05). VDR mRNA level in the JGL group was elevated markedly in comparison with alcohol + calcium D3 + alfacalcidol group (P < 0.05). Based on our results, Bu-Shen-Jian-Pi-Yi-Qi therapy inhibits bone loss, promotes bone formation, and effectively improves bone metabolism in rats with experimental alcoholic osteoporosis. The disease reversal is evidenced by increased BMD and BMC, improved biomechanical properties, elevated VDR mRNA level, enhanced response sensitivity of 1, 25(OH)2D3, and reduced S-Ca/P.
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