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Shinozaki Y, Katayama Y, Yamaguchi F, Suzuki T, Watanabe K, Uno K, Tsutsui T, Sugimoto M, Shinohara M, Miyajima K, Ohta T. Salt loading with unilateral nephrectomy accelerates decline in glomerular filtration rate in the hypertensive, obese, type 2 diabetic SDT fatty rat model of diabetic kidney disease. Clin Exp Pharmacol Physiol 2022; 49:492-500. [DOI: 10.1111/1440-1681.13621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/04/2022] [Accepted: 01/12/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Yuichi Shinozaki
- Laboratory of Animal Physiology and Functional Anatomy Graduate School of Agriculture Kyoto University Kyoto Japan
| | - Yuko Katayama
- Research Division SCOHIA PHARMA, Inc. Kanagawa Japan
| | | | | | - Kana Watanabe
- Department of Nutritional Science and Food Safety Faculty of Applied Biosciences Tokyo University of Agriculture Tokyo Japan
| | - Kinuko Uno
- Department of Nutritional Science and Food Safety Faculty of Applied Biosciences Tokyo University of Agriculture Tokyo Japan
| | - Takahiro Tsutsui
- Laboratory of Animal Physiology and Functional Anatomy Graduate School of Agriculture Kyoto University Kyoto Japan
| | - Miki Sugimoto
- Laboratory of Animal Physiology and Functional Anatomy Graduate School of Agriculture Kyoto University Kyoto Japan
| | | | - Katsuhiro Miyajima
- Department of Nutritional Science and Food Safety Faculty of Applied Biosciences Tokyo University of Agriculture Tokyo Japan
| | - Takeshi Ohta
- Laboratory of Animal Physiology and Functional Anatomy Graduate School of Agriculture Kyoto University Kyoto Japan
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Characterization of Enlarged Kidneys and Their Potential for Inducing Diabetes in DEK Rats. BIOLOGY 2021; 10:biology10070633. [PMID: 34356489 PMCID: PMC8301011 DOI: 10.3390/biology10070633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 11/16/2022]
Abstract
The kidneys participate in the regulation of systemic glucose metabolism via gluconeogenesis, insulin degradation, and the tubular reabsorption of glucose. The present study characterized rats from a strain of a novel type 2 diabetes model with enlarged kidneys (DEK). Histological and biochemical analyses of DEK rats were performed to assess the relationships between their kidneys and hyperglycemia. The kidney weight of diabetic DEK (DEK-DM) gradually increased over time from the onset of diabetes, with the glomerular number being higher in DEK-DM than in normal DEK (DEK-cont). A positive correlation between blood glucose level and kidney weight was observed in DEK-DM. The similar glomerular size and single glomerular creatinine clearance in DEK-cont and DEK-DM indicated that glomerular hypertrophy and hyperfiltration were not involved in the renal enlargement. Uninephrectomy (1/2Nx) in DEK-DM resulted in a reduction in blood glucose level at 7-28 post-operation days, with this concentration remaining lower than in Sham group until 84 days post-operation. 1/2Nx also improved systemic conditions, including reduced body weight gain, polyuria, polydipsia, and hyperphagia. Plasma concentrations of Na, total cholesterol, albumin, and total protein were higher, and urinary excretion of glucose, urea nitrogen, and proteins were lower, in the 1/2Nx than in the Sham group. Remnant kidney weight was two-fold higher in the 1/2Nx than in the Sham group 84 days later. In addition, 1/2Nx resulted in renal tubular dilatation but not in the progression of fibrosis or glomerular lesions. Taken together, these findings indicate that enlarged kidneys were associated with the onset of diabetes and with the resistance to diabetic nephropathy in DEK-DM.
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Rodrigues AM, Serralha RS, Lima DY, Punaro GR, Visona I, Fernandes MJS, Higa EMS. P2X7 siRNA targeted to the kidneys increases klotho and delays the progression of experimental diabetic nephropathy. Purinergic Signal 2020; 16:175-185. [PMID: 32377919 PMCID: PMC7367965 DOI: 10.1007/s11302-020-09695-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 03/06/2020] [Indexed: 01/22/2023] Open
Abstract
Previous studies in our laboratory have suggested that P2X7 could contribute to the progression of diabetic nephropathy and modulated klotho expression. The aim of this study was to investigate if P2X7 receptor is related to the expression of klotho in the onset of diabetic nephropathy in rats. Seven-week-old male Wistar rats weighing 210 g were all uninephrectomized; two-third of the animals were induced to diabetes with 60 mg/kg streptozotocin i.v., and one-third received its vehicle (control rats). At 4th day of the fifth week of the protocol, half of the diabetic rats received a small interfering RNA targeting for P2X7 mRNA, and the other half received its vehicle. Euthanasia was made at the eighth week. Diabetic animals reproduced all classic symptoms of the disease; besides, they showed reduced renal function and low NO bioavailability; also, SOD1, SOD2, and catalase were increased, probably due to the oxidative stress which was elevated in this situation. Metabolic data of diabetic rats did not change by silencing P2X7 receptor. For the other hand, silencing P2X7 was able to contribute to balance oxidative and nitrosative profile, ultimately improving the renal function and increasing plasma and membrane forms of klotho. These findings suggest that the management of P2X7 receptor can benefit the kidneys with diabetic nephropathy. Further studies are needed to show the therapeutic potential of this receptor inhibition to provide a better quality of life for the diabetic patient.
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Affiliation(s)
- A M Rodrigues
- Translational Medicine, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Laboratory of Nitric Oxide and Oxidative Stress, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - R S Serralha
- Translational Medicine, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Laboratory of Nitric Oxide and Oxidative Stress, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - D Y Lima
- Laboratory of Nitric Oxide and Oxidative Stress, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Nephrology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - G R Punaro
- Laboratory of Nitric Oxide and Oxidative Stress, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Nephrology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - I Visona
- Department of Pathology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - M J S Fernandes
- Department of Neurology and Neurosurgery, Neuroscience, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - E M S Higa
- Translational Medicine, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
- Laboratory of Nitric Oxide and Oxidative Stress, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
- Nephrology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
- Emergency Division, Department of Medicine, Universidade Federal Sao Paulo, Sao Paulo, Brazil.
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Takemura S, Shimizu T, Oka M, Sekiya S, Babazono T. Transplantation of adipose-derived mesenchymal stem cell sheets directly into the kidney suppresses the progression of renal injury in a diabetic nephropathy rat model. J Diabetes Investig 2020; 11:545-553. [PMID: 31622047 PMCID: PMC7232293 DOI: 10.1111/jdi.13164] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 09/15/2019] [Accepted: 10/11/2019] [Indexed: 02/06/2023] Open
Abstract
AIMS/INTRODUCTION Adipose-derived mesenchymal stem cell (ASC) transplantation is a promising therapy for diabetic nephropathy (DN). However, intravascular administration of ASCs is associated with low engraftment in target organs. Therefore, we considered applying the cell sheet technology to ASCs. In this study, ASC sheets were directly transplanted into the kidneys of a DN rat model, and therapeutic consequences were analyzed. MATERIALS AND METHODS Adipose-derived mesenchymal stem cells were isolated from adipose tissues of 7-week-old enhanced green fluorescent protein rats, and ASC sheets were prepared using a temperature-responsive culture dish. A DN rat model was established from 5-week-old Spontaneously Diabetic Torii fatty rats. Seven-week-old DN rats (n = 21) were assigned to one of the following groups: sham-operated (n = 6); ASC suspension (6.0 × 106 cells/mL) administered intravenously (n = 7); six ASC sheets transplanted directly into the kidney (n = 8). The therapeutic effect of the cell sheets was determined based on urinary biomarker expression and histological analyses. RESULTS The ASC sheets survived under the kidney capsule of the DN rat model for 14 days after transplantation. Furthermore, albuminuria and urinary tumor necrosis factor-α levels were significantly lower in the ASC sheets transplanted directly into the kidney group than in the sham-operated and ASC suspension administered intravenously groups (P < 0.05). Histologically, the ASC sheets transplanted directly into the kidney group presented mild atrophy of the proximal tubule and maintained the renal tubular structure. CONCLUSIONS Transplantation of ASC sheets directly into the kidney improved transplantation efficiency and suppressed renal injury progression. Therefore, the ASC sheet technology might be a promising novel treatment for DN.
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Affiliation(s)
- Shunsuke Takemura
- Department of MedicineDiabetes CenterSchool of MedicineTokyo Women’s Medical UniversityTokyoJapan
- Institute of Advanced Biomedical Engineering and ScienceTokyo Women’s Medical UniversityTokyoJapan
| | - Tatsuya Shimizu
- Institute of Advanced Biomedical Engineering and ScienceTokyo Women’s Medical UniversityTokyoJapan
| | - Masatoshi Oka
- Department of MedicineKidney CenterTokyo Women’s Medical UniversityTokyoJapan
| | - Sachiko Sekiya
- Institute of Advanced Biomedical Engineering and ScienceTokyo Women’s Medical UniversityTokyoJapan
| | - Tetsuya Babazono
- Department of MedicineDiabetes CenterSchool of MedicineTokyo Women’s Medical UniversityTokyoJapan
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Tanabe J, Ogura Y, Nakabayashi M, Nagai Y, Watanabe S, Sugaya T, Ohata K, Ichikawa D, Inoue K, Hoshino S, Kimura K, Shibagaki Y, Ono Y, Kamijo-Ikemori A. The Possibility of Urinary Liver-Type Fatty Acid-Binding Protein as a Biomarker of Renal Hypoxia in Spontaneously Diabetic Torii Fatty Rats. Kidney Blood Press Res 2019; 44:1476-1492. [PMID: 31734667 DOI: 10.1159/000503926] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/04/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Renal hypoxia is an aggravating factor for tubulointerstitial damage, which is strongly associated with renal prognosis in diabetic kidney disease (DKD). Therefore, urinary markers that can detect renal hypoxia are useful for monitoring DKD. OBJECTIVE To determine the correlation between urinary liver-type fatty acid-binding protein (L-FABP) and renal hypoxia using a novel animal model of type 2 diabetes. METHODS Male spontaneously diabetic Torii (SDT) fatty rats (n = 6) were used as an animal model of type 2 diabetes. Age- and sex-matched Sprague-Dawley (SD) rats (n = 8) were used as controls. Body weight, systolic blood pressure, and blood glucose levels were measured at 8, 12, 16, and 24 weeks of age. Urine samples and serum and kidney tissues were collected at 24 weeks of age. Microvascular blood flow index (BFI) was measured using diffuse correlation spectroscopy before sampling both the serum and kidneys for the evaluation of renal microcirculation at the corticomedullary junction. RESULTS Obesity, hyperglycemia, and hypertension were observed in the SDT fatty rats. Focal glomerular sclerosis, moderate interstitial inflammation, and fibrosis were significantly more frequent in SDT fatty rats than in SD rats. While the frequency of peritubular endothelial cells and phosphoendothelial nitric oxide synthase levels were similar in both types of rats, the degree of renal hypoxia-inducible factor-1α (HIF-1α) expression was significantly higher (and with no change in renal vascular endothelial growth factor expression levels) in the SDT fatty rats. Urinary L-FABP levels were significantly higher and renal microvascular BFI was significantly lower in the SDT fatty rats than in the SD rats. Urinary L-FABP levels exhibited a significant positive correlation with renal HIF-1α expression and a significant negative correlation with renal microvascular BFI. CONCLUSIONS Urinary L-FABP levels reflect the degree of renal hypoxia in DKD in a type 2 diabetic animal model. Urinary L-FABP may thus prove useful as a renal hypoxia marker for monitoring DKD in patients with type 2 diabetes in clinical practice.
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Affiliation(s)
- Jun Tanabe
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Yuji Ogura
- Department of Physiology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Mikie Nakabayashi
- Department of Electronics and Bioinformatics, School of Science and Technology, Meiji University, Kanagawa, Japan
| | - Yoshio Nagai
- Division of Metabolism and Endocrinology, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Shiika Watanabe
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Takeshi Sugaya
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Keiichi Ohata
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Daisuke Ichikawa
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Kazuho Inoue
- Department of Anatomy, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Seiko Hoshino
- Department of Anatomy, St. Marianna University School of Medicine, Kanagawa, Japan
| | | | - Yugo Shibagaki
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Yumie Ono
- Department of Electronics and Bioinformatics, School of Science and Technology, Meiji University, Kanagawa, Japan
| | - Atsuko Kamijo-Ikemori
- Division of Nephrology and Hypertension, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan, .,Department of Anatomy, St. Marianna University School of Medicine, Kanagawa, Japan,
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Lu XY, Zhou FH, Dong YQ, Gong LN, Li QY, Tang L, Cai Z, He JY, Liu MH. Codonopsis tangshen Oliv. Amelioration Effect on Diabetic Kidney Disease Rats Induced by High Fat Diet Feeding Combined with Streptozotocin. NATURAL PRODUCTS AND BIOPROSPECTING 2018; 8:441-451. [PMID: 30387083 PMCID: PMC6224812 DOI: 10.1007/s13659-018-0187-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/15/2018] [Indexed: 05/04/2023]
Abstract
Diabetic kidney disease (DKD) is the most serious microvascular complication during the development of diabetes with the characterizations of glomerular basement membrane thickening, mesangial expansion, and glomerular sclerosis, eventually leading to end-stage renal disease. This study aimed to investigate the melioration effect of Codonopisis tangshen Oliv. (COD) on the DKD model, which was established by unilateral nephrectomy (UN)-high fat diet feeding (HFD) combined with streptozotocin (STZ). After the DKD rats were oral treated with COD at a dose of 2.7 mg/kg for 4 consecutive weeks, the blood glucose, lipid metabolism, renal function, inflammatory mediators, and fibrosis-associated proteins were examined. In vivo, the COD administration obviously relieved the weight loss, water intake, and blood glucose; decreased the total cholesterol, triglyceride, and low-density lipoprotein cholesterol levels; and improved the renal function by reducing the expression of serum creatinine, uric acid, and urinary protein compared with the model group. The levels of pro-inflammatory cytokines of tumor necrosis factor-α, interleukin-1β, and IL-6 were significantly inhibited by COD. Meanwhile, the deposition of collagen fiber was markedly increased, and the protein and mRNA expressions of transforming growth factor-β1 and α-smooth muscle actin were markedly elevated in DKD rats, but they were decreased to some extent after the COD treatment. In conclusion, COD exhibited a protective effect on the UN-HFD feeding combined with STZ-induced DKD model by improving the blood glucose and lipid metabolism, relieving the inflammatory response, and mitigating the renal fibrosis, which provided scientific evidence for its applications in clinic.
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Affiliation(s)
- Xian-Yuan Lu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Feng-Hua Zhou
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515 China
| | - Ya-Qian Dong
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Lin-Na Gong
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Qing-Yun Li
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Lan Tang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Zheng Cai
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
| | - Jing-Yu He
- Bioengineering Research Centre, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou, 511458 China
| | - Meng-Hua Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515 China
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