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Wang B, Kim K, Tian M, Kameishi S, Zhuang L, Okano T, Huang Y. Engineered Bone Marrow Stem Cell-Sheets Alleviate Renal Damage in a Rat Chronic Glomerulonephritis Model. Int J Mol Sci 2023; 24:ijms24043711. [PMID: 36835123 PMCID: PMC9959772 DOI: 10.3390/ijms24043711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
Although mesenchymal stem cell (MSC)-based regenerative therapy is being developed for the treatment of kidney diseases, cell delivery and engraftment still need to be improved. Cell sheet technology has been developed as a new cell delivery method, to recover cells as a sheet form retaining intrinsic cell adhesion proteins, which promotes its transplantation efficiency to the target tissue. We thus hypothesized that MSC sheets would therapeutically reduce kidney disease with high transplantation efficiency. When the chronic glomerulonephritis was induced by two injections of the anti-Thy 1.1 antibody (OX-7) in rats, the therapeutic efficacy of rat bone marrow stem cell (rBMSC) sheet transplantation was evaluated. The rBMSC-sheets were prepared using the temperature-responsive cell-culture surfaces and transplanted as patches onto the surface of two kidneys of each rat at 24 h after the first injection of OX-7. At 4 weeks, retention of the transplanted MSC-sheets was confirmed, and the animals with MSC-sheets showed significant reductions in proteinuria, glomerular staining for extracellular matrix protein, and renal production of TGFß1, PAI-1, collagen I, and fibronectin. The treatment also ameliorated podocyte and renal tubular injury, as evidenced by a reversal in the reductions of WT-1, podocin, and nephrin and by renal overexpression of KIM-1 and NGAL. Furthermore, the treatment enhanced gene expression of regenerative factors, and IL-10, Bcl-2, and HO-1 mRNA levels, but reduced TSP-1 levels, NF-kB, and NAPDH oxidase production in the kidney. These results strongly support our hypothesis that MSC-sheets facilitated MSC transplantation and function, and effectively retarded progressive renal fibrosis via paracrine actions on anti-cellular inflammation, oxidative stress, and apoptosis and promoted regeneration.
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Affiliation(s)
- Bin Wang
- Department of Internal Medicine, Division of Nephrology & Hypertension, University of Utah Health Science, Salt Lake City, UT 84132, USA
| | - Kyungsook Kim
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah Health Science, Salt Lake City, UT 84112, USA
| | - Mi Tian
- Department of Internal Medicine, Division of Nephrology & Hypertension, University of Utah Health Science, Salt Lake City, UT 84132, USA
| | - Sumako Kameishi
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah Health Science, Salt Lake City, UT 84112, USA
| | - Lili Zhuang
- Department of Internal Medicine, Division of Nephrology & Hypertension, University of Utah Health Science, Salt Lake City, UT 84132, USA
| | - Teruo Okano
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah Health Science, Salt Lake City, UT 84112, USA
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, Tokyo 162-8666, Japan
- Correspondence: (T.O.); (Y.H.); Tel.: +801-585-0581 (Y.H.); Fax: +801-213-2563 (Y.H.)
| | - Yufeng Huang
- Department of Internal Medicine, Division of Nephrology & Hypertension, University of Utah Health Science, Salt Lake City, UT 84132, USA
- Correspondence: (T.O.); (Y.H.); Tel.: +801-585-0581 (Y.H.); Fax: +801-213-2563 (Y.H.)
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Valsartan in Combination with Tripterygium Glycosides Protects against Chronic Nephritis via the Toll-Like Receptor 4 Pathway. Anal Cell Pathol 2022; 2022:4807028. [PMID: 36061150 PMCID: PMC9433283 DOI: 10.1155/2022/4807028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 07/20/2022] [Indexed: 11/17/2022] Open
Abstract
Objective. Valsartan has been studied to exert effects on kidney disease. However, the concrete function of valsartan in combination with tripterygium glycosides in chronic nephritis remained largely unknown. The study was designed to unravel the impacts of valsartan and tripterygium glycosides in chronic nephritis through the Toll-like Receptor 4 (TLR4) pathway. Methods. The renal function indicators such as serum creatinine (Scr), blood urea nitrogen (BUN) and β2 microglobulin (β2-MG), 24 h urine protein (Upro) levels, and blood lipid indicators such as total cholesterol (TC), low-density lipoprotein (LDL-C), triacylglycerol (TG) and high-density lipoprotein (HDL-C), inflammatory factors (e.g., IL-1β and IL-8), and the proportion of T lymphocyte subpopulations (CD4+ and CD8+) were detected in chronic nephritis patients before and after treatment with valsartan alone or valsartan combined with tripterygium glycosides. Symptoms of adverse reactions were recorded. TLR4 expression in the patients’ serum was examined. Results. Compared to patients before treatment, after treatment with valsartan alone or valsartan combined with tripterygium glycosides, the renal function indicators Scr, BUN, and 24 h levels were reduced, and TC, TG, and LDL-C levels were reduced, while HDL-C levels were elevated; inflammatory responses (IL-1β and IL-8) were mitigated; CD4+ ratio and CD4+/CD8+ ratio increased yet CD8+ ratio decreased; TLR4 expression was silenced after treatment. All of the changes were more obvious in patients after being treated with valsartan combined with tripterygium glycosides. Conclusion. Valsartan in combination with tripterygium glycosides protects against chronic nephritis via suppressing the Toll-like Receptor 4 pathway.
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Chang J, Zheng J, Gao X, Dong H, Yu H, Huang M, Sun Z, Feng X. TangShenWeiNing Formula Prevents Diabetic Nephropathy by Protecting Podocytes Through the SIRT1/HIF-1α Pathway. Front Endocrinol (Lausanne) 2022; 13:888611. [PMID: 35721758 PMCID: PMC9204479 DOI: 10.3389/fendo.2022.888611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/25/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Diabetic nephropathy (DN) represents a major complication of diabetes, and podocyte injury has a critical function in DN development. TangShenWeiNing formula (TSWN) has been demonstrated to efficiently decrease proteinuria and protect podocytes in DN. This work aimed to explore the mechanism by which TSWN alleviates DN and protects podocytes. METHODS The major bioactive components of TSWN were detected by mass spectrometry (MS) and pharmacological databases. Eight-week-old male C57BLKS/J db/m and db/db mice were provided pure water, valsartan, low dose TSWN, middle dose TSWN and high dose TSWN by gavage for 12 weeks, respectively. RESULTS MS and network pharmacology analyses suggested that TSWN might prevent DN through the sirtuin (SIRT)1/hypoxia-inducible factor (HIF)-1α pathway. Diabetic mice showed elevated urinary albumin in comparison with non-diabetic mice, and TSWN decreased urinary albumin in diabetic mice. Histological injury increased in the kidney in diabetic mice, which could be improved by TSWN. Fibrosis and collagen I expression were induced in the diabetic mouse kidney in comparison with the non-diabetic mouse kidney; TSWN alleviated these effects. Apoptosis and cleaved caspase-3 were induced in the diabetic mouse kidney in comparison with the non-diabetic mouse kidney, and TSWN blunted these effects. Podocytes were damaged in the diabetic mouse kidney, which was improved by TSWN. Podocin and nephrin amounts were decreased in the diabetic mouse kidney in comparison with the non-diabetic mouse kidney, and podocalyxin was increased in urine of diabetic animals in comparison with non-diabetic counterparts. After TSWN treatment, podocin and nephrin were raised in the diabetic mouse kidney, and urinary podocalyxin was depressed in diabetic animals. Diabetic mice had lower SIRT1 and higher HIF-1α amounts in kidney specimens in comparison with non-diabetic mice, and TSWN promoted SIRT1 and inhibited HIF-1α in the diabetic mouse kidney. Moreover, co-staining of SIRT1 and podocin revealed that SIRT1 decreased in podocytes from diabetic mice in comparison with those from non-diabetic mice, and TSWN elevated SIRT1 in podocytes. CONCLUSIONS This study indicated that TSWN alleviates DN by improving podocyte injury through the SIRT1/HIF-1α pathway in diabetic mouse kidneys.
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Affiliation(s)
- Jing Chang
- Department of Internal Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Jinsu Zheng
- Department of Traditional Chinese Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xia Gao
- Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Hengbei Dong
- Department of Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Haitian Yu
- Education Division, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Mengxiu Huang
- Department of Hepatobiliary, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Zhencheng Sun
- Department of Osteology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xiaomeng Feng
- Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
- *Correspondence: Xiaomeng Feng,
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Inhibition of RNA-binding protein HuR reduces glomerulosclerosis in experimental nephritis. Clin Sci (Lond) 2020; 134:1433-1448. [PMID: 32478392 PMCID: PMC8086301 DOI: 10.1042/cs20200193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/27/2020] [Accepted: 06/01/2020] [Indexed: 12/21/2022]
Abstract
Recent identification of an RNA-binding protein (HuR) that regulates mRNA turnover and translation of numerous transcripts via binding to an ARE in their 3′-UTR involved in inflammation and is abnormally elevated in varied kidney diseases offers a novel target for the treatment of renal inflammation and subsequent fibrosis. Thus, we hypothesized that treatment with a selective inhibition of HuR function with a small molecule, KH-3, would down-regulate HuR-targeted proinflammatory transcripts thereby improving glomerulosclerosis in experimental nephritis, where glomerular cellular HuR is elevated. Three experimental groups included normal and diseased rats treated with or without KH-3. Disease was induced by the monoclonal anti-Thy 1.1 antibody. KH-3 was given via daily intraperitoneal injection from day 1 after disease induction to day 5 at the dose of 50 mg/kg BW/day. At day 6, diseased animals treated with KH-3 showed significant reduction in glomerular HuR levels, proteinuria, podocyte injury determined by ameliorated podocyte loss and podocin expression, glomerular staining for periodic acid-Schiff positive extracellular matrix proteins, fibronectin and collagen IV and mRNA and protein levels of profibrotic markers, compared with untreated disease rats. KH-3 treatment also reduced disease-induced increases in renal TGFβ1 and PAI-1 transcripts. Additionally, a marked increase in renal NF-κB-p65, Nox4, and glomerular macrophage cell infiltration observed in disease control group was largely reversed by KH-3 treatment. These results strongly support our hypothesis that down-regulation of HuR function with KH-3 has therapeutic potential for reversing glomerulosclerosis by reducing abundance of pro-inflammatory transcripts and related inflammation.
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Yu J, Zhu C, Yin J, Yu D, Wan F, Tang X, Jiang X. Tetrandrine Suppresses Transient Receptor Potential Cation Channel Protein 6 Overexpression- Induced Podocyte Damage via Blockage of RhoA/ROCK1 Signaling. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:361-370. [PMID: 32095070 PMCID: PMC6995298 DOI: 10.2147/dddt.s234262] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/14/2020] [Indexed: 02/05/2023]
Abstract
Objective Podocyte damage is common in many renal diseases characterized by proteinuria. Transient receptor potential cation channel protein 6 (TRPC6) plays an important role in renal function through its regulation of intracellular Ca2+ influx and RhoA/ROCK pathways. Chinese herb Stephania tetrandra, with the main active component being tetrandrine, has been used for the treatment of various kidney diseases for several years and has shown a positive effect. This study aimed at investigating the effect and mechanism of tetrandrine in podocyte damage induced by high expression of TRPC6. Methods Immortalized, differentiated murine podocytes, MPC5 were treated with valsartan (0–800 μM) and tetrandrine (0–40 μM) for 48 h. The maximum safe concentrations of valsartan and tetrandrine were selected using a cell viability assay. MPC5 podocytes stably expressing TRPC6 were constructed using a lentivirus packaging system, followed by treatment with valsartan, tetrandrine, and Y-27632 for 48 h and U73122 (10 μM) for 10 min. The RhoA/ROCK pathway and podocyte-specific proteins (nephrin and synaptopodin) levels were quantified. Podocyte apoptosis and intracellular Ca2+ concentration were measured. Results Maximum safe concentrations of 100 μM valsartan and 10 μM tetrandrine showed no observable toxicity in podocytes. MPC5 podocytes stably expressing TRPC6 had higher intracellular Ca2+ influx, apoptotic percentages, and expression of RhoA/ROCK proteins, but lower expression of nephrin and synaptopodin proteins. U73122 treatment for 10 min did not inhibit TRPC6, but suppressed RhoA/ROCK protein. Y-27632 decreased ROCK1 expression, but did not influence the expression of TRPC6 protein. Both 100 μM valsartan and 10 μM tetrandrine for 48 h significantly inhibited intracellular Ca2+ influx, apoptosis, and RhoA/ROCK pathway, and increased nephrin and synaptopodin proteins in podocytes stably expressing TRPC6. Conclusion Elevated TRPC6 expression can lead to podocyte injury by inducing intracellular Ca2+ influx and apoptosis of podocytes, and this effect may be mediated by activation of the RhoA/ROCK1 pathway. Tetrandrine can alleviate podocyte injury induced by TRPC6 expression through inhibition of the RhoA/ROCK pathway, suggesting a protective role in podocyte damage.
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Affiliation(s)
- Jin Yu
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Caifeng Zhu
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Jiazhen Yin
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Dongrong Yu
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Feng Wan
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Xuanli Tang
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
| | - Xue Jiang
- Department of Nephrology, Guangxing Hospital Affiliated to ZheJiang Chinese Medical University (Key Laboratory of Zhejiang Province, Management of Kidney Disease), Hangzhou 310007, People's Republic of China
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The effectiveness of chitosan-mediated silencing of PDGF-B and PDGFR-β in the mesangial proliferative glomerulonephritis therapy. Exp Mol Pathol 2019; 110:104280. [DOI: 10.1016/j.yexmp.2019.104280] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/18/2019] [Accepted: 06/28/2019] [Indexed: 12/13/2022]
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Prorenin independently causes hypertension and renal and cardiac fibrosis in cyp1a1-prorenin transgenic rats. Clin Sci (Lond) 2018; 132:1345-1363. [PMID: 29848510 PMCID: PMC6024026 DOI: 10.1042/cs20171659] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 05/10/2018] [Accepted: 05/25/2018] [Indexed: 12/20/2022]
Abstract
Plasma prorenin is commonly elevated in diabetic patients and appears to predict the development of diabetic nephropathy. However, the pathological role of prorenin is unclear. In the present study, a transgenic, inducible, hepatic prorenin-overexpressing rat model was generated and the effect of prorenin in organ injury was examined. Four groups of rats (cyp1a1 prorenin transgenic male and female rats and non-transgenic littermates) were assigned to receive a diet containing 0.3% of the transgene inducer indole-3-carbinol (I3C) for 4 weeks. Plasma prorenin concentration was increased and mean arterial pressure (MAP) increased from 80 ± 18 to 138 ± 17 (mmHg), whereas renal prorenin/renin protein expression was unchanged, in transgenic rats fed with I3C diet. The intact prorenin, not renin, in plasma and urine samples was further observed by Western blot analysis. Importantly, transgenic rats with high levels of prorenin developed albuminuria, glomerular and tubulointerstitial fibrosis associated with increased expression of transforming growth factor β (TGFβ) 1 (TGFβ1), plasminogen activator inhibitor-1 (PAI-1), collagen, and fibronectin (FN). These rats also exhibited cardiac hypertrophy determined by echocardiography, with elevated ratio of heart weight to body weight (HW/BW). Cardiac collagen in interstitial and perivascular regions was prominent, accompanied by the increase in mRNA contents of atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), β-myosin heavy chain (β-MHC), TGFβ1, PAI-1, and collagen in the heart tissue. Furthermore, renal protein levels of p-NF-κB-p65 and monocyte chemoattractant protein-1 (MCP-1), NAPDH oxidases, malondialdehyde (MDA) and 8-isoprostane (8-IP), p-ERK, p-β-catenin, and p-Akt were dramatically increased in prorenin overexpressing rats. These results indicate that prorenin, without being converted into renin, causes hypertension, renal and cardiac fibrosis via the induction of inflammation, oxidative stress and the ERK, β-catenin, and Akt-mediated signals.
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Tian M, Tang L, Wu Y, Beddhu S, Huang Y. Adiponectin attenuates kidney injury and fibrosis in deoxycorticosterone acetate-salt and angiotensin II-induced CKD mice. Am J Physiol Renal Physiol 2018; 315:F558-F571. [PMID: 29873514 DOI: 10.1152/ajprenal.00137.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Adiponectin (ApN) is a multifunctional adipokine. However, high, rather than low, concentrations of ApN are unexpectedly found in patients with chronic kidney disease (CKD) via an as yet unknown mechanism, and the role of ApN in CKD is unclear. Herein, we investigated the effect of ApN overexpression on progressive renal injury resulting from deoxycorticosterone acetate-salt (DOCA) and angiotensin II (ANG II) infusion using a transgenic, inducible ApN-overexpressing mouse model. Three groups of mice [wild type receiving no infusion (WT) and WT and cytochrome P450 1a1 (cyp1a1)-ApN transgenic mice (ApN-Tg) receiving DOCA+ANG II infusion (WT/DOCA+ANG II and ApN-Tg/DOCA+ANG II)] were assigned to receive normal food containing 0.15% of the transgene inducer indole-3-carbinol (I3C) for 3 wk. In the I3C-induced ApN-Tg/DOCA+ANG II mice, not the WT or WT/DOCA+ANG II mice, overexpression of ApN in liver resulted in 3.15-fold increases in circulating ApN compared with nontransgenic controls. Of note, the transgenic mice receiving DOCA+ANG II infusion were still hypertensive but had much less albuminuria and glomerular and tubulointerstitial fibrosis, which were associated with ameliorated podocyte injury determined by ameliorated podocyte loss and foot process effacement, and alleviated tubular injury determined by ameliorated mRNA overexpression of kidney injury molecule-1 and neutrophil gelatinase-associated lipocalin and mRNA decreases of cubilin and megalin in tubular cells, compared with WT/DOCA+ANG II mice. In addition, renal production of NF-κB-p65, NAPDH oxidase 2, and p47 phox and MAPK-related cellular proliferation, which were induced in WT/DOCA+ANG II mice, were markedly reduced in ApN-Tg/DOCA+ANG II mice. These results indicate that elevated ApN in the CKD mouse model is renal protective. Enhancing ApN production or signaling may have therapeutic potential for CKD.
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Affiliation(s)
- Mi Tian
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah Health , Salt Lake City, Utah.,Division of Nephrology, Department of Internal Medicine, Shengjing Hospital, China Medical University , Shenyang , China
| | - Li Tang
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah Health , Salt Lake City, Utah.,Center of Kidney Transplantation, Ningbo Urology and Nephrology Hospital , Ningbo , China
| | - Yuanyuan Wu
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah Health , Salt Lake City, Utah
| | - Srinivasan Beddhu
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah Health , Salt Lake City, Utah
| | - Yufeng Huang
- Division of Nephrology & Hypertension, Department of Internal Medicine, University of Utah Health , Salt Lake City, Utah
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Conlin CC, Huang Y, Gordon BAJ, Zhang JL. Quantitative characterization of glomerular fibrosis with magnetic resonance imaging: a feasibility study in a rat glomerulonephritis model. Am J Physiol Renal Physiol 2018; 314:F747-F752. [PMID: 29357425 DOI: 10.1152/ajprenal.00529.2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Glomerular fibrosis occurs in the early stages of multiple renal diseases, including hypertensive and diabetic nephropathy. Conventional assessment of glomerular fibrosis relies on kidney biopsy, which is invasive and does not reflect physiological aspects such as blood perfusion. In this study, we sought to assess potential changes of cortical perfusion and microstructure at different degrees of glomerular fibrosis using magnetic resonance imaging (MRI). A rat model of glomerular fibrosis was induced by injecting anti-Thy-1 monoclonal antibody OX-7 to promote mesangial extracellular matrix proliferation. For six rats on day 5 and five rats on day 12 after the induction, we measured renal cortical perfusion and spin-spin relaxation time (T2) in a 3-Tesla MRI scanner. T2 reflects tissue microstructural changes. Glomerular fibrosis severity was evaluated by histological analysis and proteinuria. Four rats without fibrosis were included as controls. In the control rats, the periodic acid-Schiff (PAS)-positive area was 22 ± 1% of total glomerular tuft, which increased significantly to 56 ± 12% and 45 ± 10% in the day 5 and day 12 fibrotic groups, respectively ( P < 0.01). For the three groups (control, day 5, and day 12 after OX-7 injection), cortical perfusion was 7.27 ± 2.54, 3.78 ± 2.17, and 3.32 ± 2.62 ml·min-1·g-1, respectively, decreasing with fibrosis severity ( P < 0.01), and cortical T2 was 75.2 ± 4.6, 84.1 ± 3.0, and 87.9 ± 5.6 ms, respectively ( P < 0.01). In conclusion, extracellular matrix proliferation in glomerular mesangial cells severely diminished blood flow through the glomeruli and also altered cortical microstructure to increase cortical T2. The MRI-measured parameters are proven to be sensitive markers for characterizing glomerular fibrosis.
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Affiliation(s)
- Christopher C Conlin
- Department of Radiology and Imaging Sciences, University of Utah , Salt Lake City, Utah.,Department of Bioengineering, University of Utah , Salt Lake City, Utah
| | - Yufeng Huang
- Division of Nephrology, Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | | | - Jeff L Zhang
- Department of Radiology and Imaging Sciences, University of Utah , Salt Lake City, Utah.,Department of Bioengineering, University of Utah , Salt Lake City, Utah
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Tang L, Wu Y, Tian M, Sjöström CD, Johansson U, Peng XR, Smith DM, Huang Y. Dapagliflozin slows the progression of the renal and liver fibrosis associated with type 2 diabetes. Am J Physiol Endocrinol Metab 2017; 313:E563-E576. [PMID: 28811292 DOI: 10.1152/ajpendo.00086.2017] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 07/28/2017] [Accepted: 07/31/2017] [Indexed: 12/25/2022]
Abstract
Sodium-glucose cotransporter 2 (SGLT2) inhibitors are a new class of antidiabetic oral agents indicating promising effects on cardiovascular and renal end points. However, the renoprotective effects of SGLT2 inhibitors are not fully understood. Also, metabolic effects of SGLT2 inhibition on other organ systems, such as effects on hepatic steatosis, are not fully understood. This study sought to address these questions by treating 18-wk-old uninephrectomized db/db mice with the selective SGLT2 inhibitor dapagliflozin. Untreated db/db mice developed progressive albuminuria, glomerular mesangial matrix expansion, and fatty liver associated with increased renal expression of TGFβ1, PAI-1, type IV collagen and fibronectin, and liver deposition of fibronectin, type I and III collagen, and laminin. Treatment with dapagliflozin (1 mg·kg-1·day-1) via gel diet from 18 to 22 wk of age not only reduced blood glucose (371.14 ± 55.02 mg/dl in treated db/db vs. 573.53 ± 21.73 mg/dl in untreated db/db, P < 0.05) and Hb A1c levels (9.47 ± 0.79% in treated db/db vs. 12.1 ± 0.73% in untreated db/db, P < 0.05) but also ameliorated the increases in albuminuria and markers of glomerulosclerosis and liver injury seen in untreated db/db mice. Furthermore, both renal expressions of NF-kB p65, MCP-1, Nox4, Nox2, and p47phox and urine TBARS levels and liver productions of myeloperoxidase and reactive oxygen species, the markers of tissue inflammation and oxidative stress, were increased in untreated db/db mice, which were reduced by dapagliflozin administration. These results demonstrate that dapagliflozin not only improves hyperglycemia but also slows the progression of diabetes-associated glomerulosclerosis and liver fibrosis by improving hyperglycemia-induced tissue inflammation and oxidative stress.
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Affiliation(s)
- Li Tang
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah
- Center of Kidney Transplantation, Ningbo Urology and Nephrology Hospital, Ningbo, Zhejiang, China
| | - Yuanyuan Wu
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - Mi Tian
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - C David Sjöström
- Global Medicine Development Unit, AstraZeneca Gothenburg, Sweden
| | - Ulrika Johansson
- Cardiovascular and Metabolic Diseases Innovative Medicines and Early Development Biotech Unit, AstraZeneca Gothenburg, Sweden; and
| | - Xiao-Rong Peng
- Cardiovascular and Metabolic Diseases Innovative Medicines and Early Development Biotech Unit, AstraZeneca Gothenburg, Sweden; and
| | - David M Smith
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Cambridge, United Kingdom
| | - Yufeng Huang
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah;
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Ameer OZ, Butlin M, Kaschina E, Sommerfeld M, Avolio AP, Phillips JK. Long-Term Angiotensin II Receptor Blockade Limits Hypertension, Aortic Dysfunction, and Structural Remodeling in a Rat Model of Chronic Kidney Disease. J Vasc Res 2016; 53:216-229. [DOI: 10.1159/000452411] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 10/08/2016] [Indexed: 11/19/2022] Open
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12
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Raeisi S, Ghorbanihaghjo A, Argani H, Dastmalchi S, Ghasemi B, Ghazizadeh T, Rashtchizadeh N, Mesgari Abbasi M, Bargahi N, Nemati M, Mota A, Vatankhah AM. The effects of valsartan on renal glutathione peroxidase expression in alleviation of cyclosporine nephrotoxicity in rats. BIOIMPACTS 2016; 6:119-124. [PMID: 27853675 PMCID: PMC5108984 DOI: 10.15171/bi.2016.18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 07/31/2016] [Accepted: 08/02/2016] [Indexed: 11/12/2022]
Abstract
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Introduction: Nephrotoxicity as a side effect caused by the immunosuppressive drug, cyclosporine-A (CsA), can be a major problem in transplant medicine. Oxidative stress may play an important role in the CsA-induced nephrotoxicity. It has been shown that the antihypertensive drug, valsartan (Val), has also renoprotective effects but, its molecular mechanism is largely unknown. In the present study, it was aimed to evaluate the Val effect in the alleviation of CsA nephrotoxicity via probable renal glutathione peroxidase (GPx) upregulation and oxidative stress decrease.
Methods: Thirty-two Sprague-Dawley rats were divided into four groups based on CsA and/or Val administration: group A (Control, 1 mL/kg/day of olive oil as vehicle), group B (CsA, 30 mg/kg/day), group C (CsA+Val, 30+30 mg/kg/day), and group D (Val, 30 mg/kg/day). After the administration period (six weeks), renal GPx expression was evaluated by real-time polymerase chain reaction (PCR). Plasma levels of GPx and 8-Hydroxydeoxyguanosine (8-OHdG) were measured by enzyme-linked immunosorbent assay (ELISA). Malondialdehyde (MDA) and protein carbonyl groups (PCG) were measured by spectrophotometer. Plasma levels of urea and creatinine were measured by an autoanalyzer.
Results: CsA treatment led to the decrease in renal expression and plasma levels of GPx in comparison to other study groups. Rats received CsA were detected to have significantly (p<0.05) higher plasma 8-OHdG, MDA, PCG, urea, and creatinine levels in comparison to other groups. Plasma urea and creatinine levels were negatively correlated with renal GPx expression and positively correlated with the oxidative stress markers.
Conclusion:Administration of Val may result in attenuating the nephrotoxic side effect of CsA via probable renal GPx upregulation, and subsequently oxidative stress decrease.
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Affiliation(s)
- Sina Raeisi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran ; Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran ; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Ghorbanihaghjo
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hassan Argani
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Siavoush Dastmalchi
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Babollah Ghasemi
- Division of Clinical Laboratory, Tabriz Children's Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Teimour Ghazizadeh
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | | | - Nasrin Bargahi
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahboob Nemati
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Mota
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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13
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Gu C, Zhang J, Noble NA, Peng XR, Huang Y. An additive effect of anti-PAI-1 antibody to ACE inhibitor on slowing the progression of diabetic kidney disease. Am J Physiol Renal Physiol 2016; 311:F852-F863. [PMID: 27511457 DOI: 10.1152/ajprenal.00564.2015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 07/05/2016] [Indexed: 02/03/2023] Open
Abstract
While angiotensin II blockade slows the progression of diabetic nephropathy, current data suggest that it alone cannot stop the disease process. New therapies or drug combinations will be required to further slow or halt disease progression. Inhibition of plasminogen activator inhibitor type 1 (PAI-1) aimed at enhancing ECM degradation has shown therapeutic potential in diabetic nephropathy. Here, using a mouse model of type diabetes, the maximally therapeutic dose of the PAI-1-neutralizing mouse monoclonal antibody (MEDI-579) was determined and compared with the maximally effective dose of enalapril. We then examined whether addition of MEDI-579 to enalapril would enhance the efficacy in slowing the progression of diabetic nephropathy. Untreated uninephrectomized diabetic db/db mice developed progressive albuminuria and glomerulosclerosis associated with increased expression of transforming growth factor (TGF)-β1, PAI-1, type IV collagen, and fibronectin from weeks 18 to 22, which were reduced by MEDI-579 at 3 mg/kg body wt, similar to enalapril given alone from weeks 12 to 22 Adding MEDI-579 to enalapril from weeks 18 to 22 resulted in further reduction in albuminuria and markers of renal fibrosis. Renal plasmin generation was dramatically reduced by 57% in diabetic mice, a decrease that was partially reversed by MEDI-579 or enalapril given alone but was further restored by these two treatments given in combination. Our results suggest that MEDI-579 is effective in slowing the progression of diabetic nephropathy in db/db mice and that the effect is additive to ACEI. While enalapril is renal protective, the add-on PAI-1 antibody may offer additional renoprotection in progressive diabetic nephropathy via enhancing ECM turnover.
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Affiliation(s)
- Chunyan Gu
- Department of Pathology, School of Medicine and Life Science, Nanjing University of Chinese Medicine, Nanjing, China.,Division of Nephrology, University of Utah, Salt Lake City, Utah; and
| | - Jiandong Zhang
- Division of Nephrology, University of Utah, Salt Lake City, Utah; and
| | - Nancy A Noble
- Division of Nephrology, University of Utah, Salt Lake City, Utah; and
| | - Xiao-Rong Peng
- Bioscience, AstraZeneca R&D, Pepparredsleden 1, Molndal SE-43183, Sweden
| | - Yufeng Huang
- Division of Nephrology, University of Utah, Salt Lake City, Utah; and
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14
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Wang S, Chen C, Su K, Zha D, Liang W, Hillebrands JL, Goor HV, Ding G. Angiotensin II induces reorganization of the actin cytoskeleton and myosin light-chain phosphorylation in podocytes through rho/ROCK-signaling pathway. Ren Fail 2015; 38:268-75. [PMID: 26652313 DOI: 10.3109/0886022x.2015.1117896] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
AIMS In the present study, we have evaluated the effect of angiotensin II (Ang II) on actin cytoskeleton reorganization and myosin light-chain (MLC) phosphorylation in podocytes to demonstrate whether the Rho/Rho-associated coiled kinase (ROCK) pathway is involved podocyte injury. METHODS Eighteen male Sprague-Dawley rats were divided into three groups and treated with Ang II, saline or telmisartan. Morphological changes were studied at 28 days after treatment. Immunohistochemistry and Western blotting were used to determine the renal expression of p-MLC and ROCK2. Cultured podocytes were treated with Ang II (10(-7 )M) with or without Rho-kinase inhibitor (Y27632, 10(-6 )M) for variable time periods. F-actin was visualized with fluorescein isothiocyanate (FITC)-conjugated phalloidin or tetraethyl rhodamine isothiocyanate (TRITC)-conjugated phalloidin. p-MLC expression was evaluated by immunofluorescence and Western blot. The activation of Rho/ROCK was evaluated by Western blot. RESULTS The expression of p-MLC in glomeruli increased significantly in rats treated with Ang II when compared to the control rats as shown by Western blot (p < 0.05). In cultured podocytes, Rho A and ROCK2 increased after incubation with Ang II. Ang II increased the expression of ROCK2, which was accompanied with altered morphology, redistribution of actin and increased phosphorylation of MLC. The distribution of actin changed to a large extent, although overall quantitative differences were not observed. Addition of Y-27632 to podocytes treated with Ang II could ameliorate F-actin cytoskeleton remodeling and the increment in p-MLC expression. CONCLUSION Ang II-induced podocyte cytoskeleton protein expression changing through the RhoA/ROCK2 p-MLC/F-actin pathway.
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Affiliation(s)
- Siyuan Wang
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China.,b Department of General , Tongji Medical College, Huazhong University of Science & Technology, The Central Hospital of Wuhan , Wuhan , Hubei , China
| | - Cheng Chen
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China.,c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Ke Su
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - Dongqing Zha
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - Wei Liang
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - J L Hillebrands
- c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Harry van Goor
- c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Guohua Ding
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
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15
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Motawi TK, El-Maraghy SA, Senousy MA. Angiotensin-Converting Enzyme Inhibition and Angiotensin AT1 Receptor Blockade Downregulate Angiotensin-Converting Enzyme Expression and Attenuate Renal Injury in Streptozotocin-Induced Diabetic Rats. J Biochem Mol Toxicol 2013; 27:378-87. [DOI: 10.1002/jbt.21500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/28/2013] [Accepted: 05/03/2013] [Indexed: 12/25/2022]
Affiliation(s)
- Tarek K. Motawi
- Biochemistry Department; Faculty of Pharmacy; Cairo University; Cairo; Egypt
| | | | - Mahmoud A. Senousy
- Biochemistry Department; Faculty of Pharmacy; Cairo University; Cairo; Egypt
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