Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys
A variety of animal models of diabetes mellitus (DM) are required to study the genetics and pathophysiology of DM. We established a novel rat strain showing nonobese type 2 diabetes with enlarged kidneys from the LEA.PET-pet congenic strain and named it Diabetes with Enlarged Kidney (DEK). The body...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Diabetes Research |
| Online Access: | http://dx.doi.org/10.1155/2019/8153140 |
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| author | Ayaka Domon Kentaro Katayama Yuki Tochigi Hiroetsu Suzuki |
| author_facet | Ayaka Domon Kentaro Katayama Yuki Tochigi Hiroetsu Suzuki |
| author_sort | Ayaka Domon |
| collection | DOAJ |
| description | A variety of animal models of diabetes mellitus (DM) are required to study the genetics and pathophysiology of DM. We established a novel rat strain showing nonobese type 2 diabetes with enlarged kidneys from the LEA.PET-pet congenic strain and named it Diabetes with Enlarged Kidney (DEK). The body growth of DEK affected rats was similar to that of normal rats before the development of DM but was attenuated with the deterioration of DM. There was a marked difference in the etiology of DEK by gender: DM phenotypes including polyuria, polydipsia, and hyperglycemia (nonfasting blood glucose over 300 mg/dl) were found in male rats aged over 10 weeks but not in female rats. The cumulative incidence of DM in DEK males at the age of 30 weeks was 44.8%. Oral glucose tolerance tests showed glucose intolerance and decreased insulin secretion in response to glucose loading in affected males, features which were exacerbated with age. Affected males exhibited disorganized architecture of pancreatic islets, decreased numbers of β cells, and markedly decreased expression of insulin, despite no pathological findings of hemorrhage or infiltration of inflammatory cells in the pancreatic islet. Age-related islet fibrosis appeared similar in normal and affected males. Affected males also showed enlarged kidneys with dilation of renal tubules in both the cortex and medulla, but no obvious glomerular lesions typical of diabetic nephropathy (DN) at the age of 30 weeks. Plasma levels of urea nitrogen and creatinine were normal, but hypoalbuminemia was detected. These pathophysiological features in affected males indicated that their renal function was almost maintained despite severe DM. Taken together, these findings indicate that the affected males of the DEK strain are a novel nonobese type 2 diabetes rat model useful for studying the mechanisms underlying β cell loss and identifying genetic factors protective against DN. |
| format | Article |
| id | doaj-art-473ab5aa5da8434aa068caf639811084 |
| institution | Kabale University |
| issn | 2314-6745 2314-6753 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Diabetes Research |
| spelling | doaj-art-473ab5aa5da8434aa068caf6398110842025-02-03T01:27:39ZengWileyJournal of Diabetes Research2314-67452314-67532019-01-01201910.1155/2019/81531408153140Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged KidneysAyaka Domon0Kentaro Katayama1Yuki Tochigi2Hiroetsu Suzuki3Laboratory of Veterinary Physiology, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, JapanLaboratory of Veterinary Physiology, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, JapanLaboratory of Veterinary Physiology, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, JapanLaboratory of Veterinary Physiology, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, JapanA variety of animal models of diabetes mellitus (DM) are required to study the genetics and pathophysiology of DM. We established a novel rat strain showing nonobese type 2 diabetes with enlarged kidneys from the LEA.PET-pet congenic strain and named it Diabetes with Enlarged Kidney (DEK). The body growth of DEK affected rats was similar to that of normal rats before the development of DM but was attenuated with the deterioration of DM. There was a marked difference in the etiology of DEK by gender: DM phenotypes including polyuria, polydipsia, and hyperglycemia (nonfasting blood glucose over 300 mg/dl) were found in male rats aged over 10 weeks but not in female rats. The cumulative incidence of DM in DEK males at the age of 30 weeks was 44.8%. Oral glucose tolerance tests showed glucose intolerance and decreased insulin secretion in response to glucose loading in affected males, features which were exacerbated with age. Affected males exhibited disorganized architecture of pancreatic islets, decreased numbers of β cells, and markedly decreased expression of insulin, despite no pathological findings of hemorrhage or infiltration of inflammatory cells in the pancreatic islet. Age-related islet fibrosis appeared similar in normal and affected males. Affected males also showed enlarged kidneys with dilation of renal tubules in both the cortex and medulla, but no obvious glomerular lesions typical of diabetic nephropathy (DN) at the age of 30 weeks. Plasma levels of urea nitrogen and creatinine were normal, but hypoalbuminemia was detected. These pathophysiological features in affected males indicated that their renal function was almost maintained despite severe DM. Taken together, these findings indicate that the affected males of the DEK strain are a novel nonobese type 2 diabetes rat model useful for studying the mechanisms underlying β cell loss and identifying genetic factors protective against DN.http://dx.doi.org/10.1155/2019/8153140 |
| spellingShingle | Ayaka Domon Kentaro Katayama Yuki Tochigi Hiroetsu Suzuki Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys Journal of Diabetes Research |
| title | Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys |
| title_full | Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys |
| title_fullStr | Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys |
| title_full_unstemmed | Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys |
| title_short | Characterization of Novel Nonobese Type 2 Diabetes Rat Model with Enlarged Kidneys |
| title_sort | characterization of novel nonobese type 2 diabetes rat model with enlarged kidneys |
| url | http://dx.doi.org/10.1155/2019/8153140 |
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