PMID- 30591957 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2472-1972 (Electronic) IS - 2472-1972 (Linking) VI - 3 IP - 1 DP - 2019 Jan 1 TI - Increased Rates of Meal Absorption Do Not Explain Elevated 1-Hour Glucose in Subjects With Normal Glucose Tolerance. PG - 135-145 LID - 10.1210/js.2018-00222 [doi] AB - CONTEXT: In subjects with normal fasting glucose (NFG) and normal glucose tolerance (NGT), glucose concentrations >155 mg/dL 1 hour after 75 g of oral glucose predict increased risk of progression to diabetes. Recently, it has been suggested that the mechanism underlying this abnormality is increased gut absorption of glucose. OBJECTIVE: We sought to determine the rate of systemic appearance of meal-derived glucose in subjects classified by their 1-hour glucose after a 75-g oral glucose challenge. DESIGN: This was a cross-sectional study. Participating subjects underwent a 75-g oral glucose challenge and a labeled mixed meal test. SETTING: An inpatient clinical research unit at an academic medical center. PARTICIPANTS: Thirty-six subjects with NFG/NGT participated in this study. INTERVENTIONS: Subjects underwent an oral glucose tolerance test. Subsequently, they underwent a labeled mixed meal to measure fasting and postprandial glucose metabolism. MAIN OUTCOME MEASURES: We examined beta-cell function and the rate of meal appearance (Meal R(a)) in NFG/NGT subjects. Subsequently, we examined the relationship of peak postchallenge glucose with Meal R(a) and indices of beta-cell function. RESULTS: Peak glucose concentrations correlated inversely with beta-cell function. No relationship of Meal R(a) with peak postchallenge glucose concentrations was observed. CONCLUSION: In subjects with NFG/NGT, elevated 1-hour peak postchallenge glucose concentrations reflect impaired beta-cell function rather than increased systemic meal appearance. FAU - Adams, J D AU - Adams JD AD - Division of Endocrinology, Diabetes, and Metabolism, Mayo Clinic, Rochester, Minnesota. FAU - Treiber, Gerlies AU - Treiber G AD - Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria. FAU - Hurtado, Maria Daniela AU - Hurtado MD AD - Division of Endocrinology, Diabetes, and Metabolism, Mayo Clinic, Rochester, Minnesota. FAU - Laurenti, Marcello C AU - Laurenti MC AD - Department of Information Engineering, Universita di Padova, 36131 Padova, Italy. FAU - Dalla Man, Chiara AU - Dalla Man C AD - Department of Information Engineering, Universita di Padova, 36131 Padova, Italy. FAU - Cobelli, Claudio AU - Cobelli C AD - Department of Information Engineering, Universita di Padova, 36131 Padova, Italy. FAU - Rizza, Robert A AU - Rizza RA AD - Division of Endocrinology, Diabetes, and Metabolism, Mayo Clinic, Rochester, Minnesota. FAU - Vella, Adrian AU - Vella A AUID- ORCID: 0000-0001-6493-7837 AD - Division of Endocrinology, Diabetes, and Metabolism, Mayo Clinic, Rochester, Minnesota. LA - eng GR - R01 DK078646/DK/NIDDK NIH HHS/United States GR - R01 DK116231/DK/NIDDK NIH HHS/United States GR - T32 DK007352/DK/NIDDK NIH HHS/United States GR - UL1 TR000135/TR/NCATS NIH HHS/United States PT - Journal Article DEP - 20181121 PL - United States TA - J Endocr Soc JT - Journal of the Endocrine Society JID - 101697997 EIN - J Endocr Soc. 2019 Jan 11;3(3):516. PMID: 30788453 PMC - PMC6302905 OTO - NOTNLM OT - 60-min glucose OT - disposition index OT - splanchnic glucose uptake EDAT- 2018/12/29 06:00 MHDA- 2018/12/29 06:01 PMCR- 2018/11/21 CRDT- 2018/12/29 06:00 PHST- 2018/07/23 00:00 [received] PHST- 2018/11/16 00:00 [accepted] PHST- 2018/12/29 06:00 [entrez] PHST- 2018/12/29 06:00 [pubmed] PHST- 2018/12/29 06:01 [medline] PHST- 2018/11/21 00:00 [pmc-release] AID - js_201800222 [pii] AID - 10.1210/js.2018-00222 [doi] PST - epublish SO - J Endocr Soc. 2018 Nov 21;3(1):135-145. doi: 10.1210/js.2018-00222. eCollection 2019 Jan 1.