Research field (4)：
Gastroenterology
, General surgery, pediatric surgery
, Metabolism and endocrinology
, Digestive surgery
Research keywords (3)：
Metabolic surgery
, Bariatric surgery
, Gastrointestinal surgery
Research theme for competitive and other funds (3)：
2022 - 2025 Mechanism of liver fibrosis progression in severely obese patients investigated by changes of bacterial flora and multiomics analysis
2020 - 2023 Analysis of nonalcoholic steatohepatistis with severe obesity end mechanism of improvement after surgery
2015 - 2018 Insulin resistance and hepatic histological changes after bariatric surgery for severe obesity with NASH
Papers (177)：
Masaki Kanno, Akira Umemura, Shigeaki Baba, Haruka Nikai, Ryo Sugimoto, Akira Sasaki. Gastric cancer after laparoscopic adjustable gastric banding: A case report. International journal of surgery case reports. 2024. 119. 109714-109714
Akira Umemura, Hiroyuki Nitta, Daiki Takeda, Hirokatsu Katagiri, Shoji Kanno, Akira Sasaki. Transthoracic transdiaphragmatic approach in laparoscopic liver resection for hepatocellular carcinoma in a patient with severe obesity and history of deceased donor liver transplantation. Asian journal of endoscopic surgery. 2024. 17. 2. e13305
Hideki Kumagai, Akira Sasaki, Akira Umemura, Keisuke Kakisaka, Takeshi Iwaya, Satoshi S Nishizuka. Effects of laparoscopic sleeve gastrectomy on nonalcoholic fatty liver disease and TGF-β signaling pathway. Endocrine journal. 2024. 71. 2. 139-152
Akira Umemura, Akira Sasaki. Invited commentary: The outcome of closure of inguinal hernia with laparoscopic percutaneous extraperitoneal closure in young adults. World journal of surgery. 2024. 48. 2. 377-378
Taro Ando, Hiroyuki Nitta, Akira Umemura, Hirokatsu Katagiri, Shoji Kanno, Daiki Takeda, Masao Nishiya, Noriyuki Uesugi, Tamotsu Sugai, Akira Sasaki. Pancreatic Ductal Adenocarcinoma Encapsulated by a Tumor-Forming Type 1 Autoimmune Pancreatitis Located at the Pancreatic Tail: A Case Report. Case reports in gastroenterology. 2024. 18. 1. 181-188
