116-OR: Changes in Glucose Tolerance and Related Factors after Renal Transplantation in Recipients with Impaired Glucose Tolerance (2022)

Background and Aims: Our previous study revealed that more than half of patients with impaired glucose tolerance (IGT) before renal transplantation improved to normal glucose tolerance after transplantation. However, the mechanism was not clear. This study aimed to investigate whether changes in glucose tolerance were associated with insulin secretion and resistance in Japanese renal transplant recipients diagnosed with IGT before transplantation. Materials and Methods: We analyzed data for 179 patients ≥20 years of age who received their first renal transplantation in our hospital from April 2005-October 20 and had no history of diabetes before transplantation. A total of 54 recipients who received the oral glucose tolerance test (OGTT) before and 1 year after transplantation and were diagnosed with IGT before transplantation. Patients were divided into two groups according to negative or positive changes in area under the blood glucose curves from 0-120 min after ingestion: improved group and non-improved group, respectively. Insulin secretion was estimated by the insulin secretion sensitivity index-2 (ISSI-2) and insulin sensitivity was estimated by the Matsuda index (MI) and homeostasis model assessment of insulin resistance (HOMA-IR) . Results: Thirty and 24 patients were in the improved and non-improved groups, respectively. ISSI-2 significantly increased from 1.67±0.44 to 2.00±0.60 (P&amp;lt;0.01) after transplantation in the improved group, but not in the non-improved group. ΔISSI-2 was significantly associated with the 60-min blood glucose level of the OGTT and ISSI-2 level before transplantation (β=0.01, P&amp;lt;0. and β=−0.59, P&amp;lt;0.01, respectively) . There were no differences in MI or HOMA-IR before and after transplantation between these two groups. Conclusion: Improvement of glucose tolerance after renal transplantation in patients diagnosed with IGT before transplantation is related to improvement of insulin secretion. Disclosure M. Kusumi: None. A. Nakamura: Research Support; Kissei Pharmaceutical Co., Ltd., MSD, Nippon Boehringer Ingelheim, Taisho Pharmaceutical Holdings Co., Ltd. H. Nomoto: None. H. Kameda: None. K. Cho: None. H. Miyoshi: Research Support; Abbott Japan Co., Ltd., Boehringer Ingelheim International GmbH, Daiichi Sankyo, Kowa Company, Ltd., LifeScan, Mitsubishi Tanabe Pharma Corporation, Novo Nordisk, Ono Pharmaceutical Co., Ltd., Sumitomo Dainippon Pharma Co., Ltd., Taisho Pharmaceutical Holdings Co., Ltd. Speaker's Bureau; Astellas Pharma Inc., Boehringer Ingelheim International GmbH, Eli Lilly and Company, Kowa Company, Ltd., Merck &amp; Co., Inc., Mitsubishi Tanabe Pharma Corporation, Novo Nordisk, Ono Pharmaceutical Co., Ltd., Sanofi K.K., Sumitomo Dainippon Pharma Co., Ltd., Taisho Pharmaceutical Holdings Co., Ltd. T. Atsumi: Consultant; AbbVie Inc., AstraZeneca, MEDICAL &amp; BIOLOGICAL LABORATORIES CO., Nippon Boehringer Ingelheim Co. Ltd., Novartis Pharma K.K., Ono Pharmaceutical Co., Ltd., Pfizer Inc. Research Support; AbbVie Inc., Alexion Pharmaceuticals, Inc., Astellas Pharma Inc., Chugai Pharmaceutical Co., Ltd., Daiichi Sankyo, Mitsubishi Tanabe Pharma Corporation, Nippon Boehringer Ingelheim Co. Ltd., Otsuka Pharmaceutical Co., Ltd., Pfizer Inc., Taiho Pharmaceutical Co. Ltd., Takeda Pharmaceutical Company Limited, Teijin Pharma Limited. Speaker's Bureau; AbbVie Inc., Astellas Pharma Inc., Bristol-Myers Squibb Company, Chugai Pharmaceutical Co., Ltd., Daiichi Sankyo, Eisai Co., Ltd., Eli Lilly and Company, Kyowa Kirin Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Novartis Pharma K.K., Pfizer Inc., Taiho Pharmaceutical Co. Ltd., Takeda Pharmaceutical Company Limited, UCB, Inc.