PMID- 29351616 OWN - NLM STAT- MEDLINE DCOM- 20181010 LR - 20210511 IS - 1945-7197 (Electronic) IS - 0021-972X (Print) IS - 0021-972X (Linking) VI - 103 IP - 4 DP - 2018 Apr 1 TI - Deficient Glucagon Response to Hypoglycemia During a Mixed Meal in Total Pancreatectomy/Islet Autotransplantation Recipients. PG - 1522-1529 LID - 10.1210/jc.2017-02182 [doi] AB - CONTEXT: Total pancreatectomy and intrahepatic islet autotransplantation (TP/IAT) is performed to alleviate severe abdominal pain, avoid narcotic use, maintain islet function, and avoid diabetes in patients with chronic pancreatitis. However, many TP/IAT recipients complain of postprandial hypoglycemia. OBJECTIVE: This study was designed to discover the mechanisms of this problem. DESIGN: Participants consumed a triple-isotope mixed meal. SETTING: This study was performed in a hospital research unit. PARTICIPANTS: We studied 10 TP/IAT recipients and 10 age- and body mass index-matched control subjects. Seven of 10 recipients had a history of postprandial hypoglycemia. INTERVENTIONS: Participants were given a [1-13C]-labeled mixed meal and two tracer infusions ([6,6-2H2]- and [6-3H]-glucose). MAIN OUTCOME MEASURES: Glucose kinetics and concentrations of regulatory hormones were determined. RESULTS: Immediately after the meal, peak glucose was elevated in recipients compared with control subjects [266 +/- 20 mg/dL (14.8 +/- 1.1 mmol/L) vs 185 +/- 13 mg/dL (10.3 +/- 0.7 mmol/L); P = 0.01]. However, mean Delta glucose for TP/IAT recipients between minutes 240 and 360 postprandially was significantly lower than for control subjects (P < 0.05); six of the seven recipients with a history of hypoglycemia experienced abnormally low postprandial Delta glucose. Delta Glucagon remained unchanged (minutes 240 to 360; P = 0.58) in TP/IAT recipients despite abnormal decreases in postprandial glucose. Radioisotopic studies revealed that meal appearance, glucose disappearance, and endogenous glucose production in TP/IAT recipients were not different from control subjects. CONCLUSION: Initially high glucose levels followed by hypoglycemia with an absent glucagon response is a mechanistic sequence that contributes to postprandial hypoglycemia after TP/IAT. FAU - Bogachus, Lindsey D AU - Bogachus LD AD - Pacific Northwest Diabetes Research Institute, Seattle, Washington. AD - Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle, Washington. FAU - Bellin, Melena D AU - Bellin MD AD - Department of Medicine and Pediatrics, Division of Diabetes, Endocrinology, and Metabolism, University of Minnesota, Minneapolis, Minnesota. FAU - Vella, Adrian AU - Vella A AD - Mayo Clinic College of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Rochester, Minnesota. FAU - Robertson, R Paul AU - Robertson RP AD - Pacific Northwest Diabetes Research Institute, Seattle, Washington. AD - Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle, Washington. AD - Department of Medicine and Pediatrics, Division of Diabetes, Endocrinology, and Metabolism, University of Minnesota, Minneapolis, Minnesota. LA - eng GR - R01 DK078646/DK/NIDDK NIH HHS/United States GR - R01 DK116231/DK/NIDDK NIH HHS/United States GR - T32 DK007203/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 RN - 0 (Blood Glucose) RN - 9007-92-5 (Glucagon) SB - IM MH - Adult MH - Blood Glucose/*metabolism MH - Female MH - Glucagon/*blood MH - Humans MH - Hypoglycemia/*blood MH - Islets of Langerhans Transplantation/*methods MH - Male MH - Meals MH - Middle Aged MH - *Pancreatectomy MH - Pancreatitis, Chronic/blood/*surgery MH - Postprandial Period/physiology MH - Transplantation, Autologous PMC - PMC6276676 EDAT- 2018/01/20 06:00 MHDA- 2018/10/12 06:00 PMCR- 2019/04/01 CRDT- 2018/01/20 06:00 PHST- 2017/10/02 00:00 [received] PHST- 2018/01/12 00:00 [accepted] PHST- 2018/01/20 06:00 [pubmed] PHST- 2018/10/12 06:00 [medline] PHST- 2018/01/20 06:00 [entrez] PHST- 2019/04/01 00:00 [pmc-release] AID - 4815706 [pii] AID - jcem_201702182 [pii] AID - 10.1210/jc.2017-02182 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 2018 Apr 1;103(4):1522-1529. doi: 10.1210/jc.2017-02182.