• Naoko Kamo, Toshimi Kaido, Ryuji Uozumi, Takashi Ito, Shintaro Yagi, Koichiro Hata, Kojiro Taura, and Shinji Uemoto.
• Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
• Nutrition. 2020 Nov 1; 79-80: 110871.

ObjectiveMost patients undergoing liver transplantation (LT) have decreased skeletal muscle mass, malnutrition, and decreased physical activity levels. These comorbidities may prevent early recovery after surgery. The aim of this study was to examine the effects of oral nutritional formula-enriched β-hydroxy-β-methyl-butyrate (HMB), a leucine metabolite that promotes muscle synthesis and suppresses proteolysis, on postoperative sarcopenia and other outcomes after adult-to-adult living donor LT (LDLT).MethodsThirty-three consecutive patients who underwent adult LDLT between March 2017 and October 2018 and who met inclusion criteria were randomly assigned in a 1:1 ratio to the HMB or control group. Patients in the HMB group received two packs of HMB-rich nutrients per day, which contained calcium-HMB (1500 mg), l-arginine (7000 mg), and l -glutamine (7000 mg) per pack orally or enterally from postoperative day 1 to 30 with postoperative rehabilitation. The primary endpoint was grip strength (GS) at 2 mo after LDLT. Secondary endpoints included GS at 1 mo after LDLT, skeletal muscle mass index (SMI) at 1 and 2 mo after LDLT, laboratory findings, incidence of postoperative bacteremia, and postoperative hospital length of stay (LOS).ResultsTwelve patients in the HMB group and 11 in the control group were included in the final analysis. GS at 1 and 2 mo and SMI values at 2 mo were significantly higher in the HMB group than in the control group (GS: both P < 0.001, SMI: P = 0.04). In the HMB group, white blood cell count 3 wk after LDLT was significantly lower (P = 0.005), and postoperative hospital LOS was significantly shorter (P = 0.028) compared with the control group. The incidence of postoperative bacteremia was lower in the HMB group.ConclusionsPostoperative administration of HMB-enriched formula with rehabilitation significantly increased GS at 1 and 2 mo and SMI at 2 mo and shortened postoperative hospital LOS after LDLT.Copyright © 2020 Elsevier Inc. All rights reserved.

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