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Effect of Progressive Weight Loss on Lactate Metabolism: A Randomized Controlled Trial
Author(s) -
Chondronikola Maria,
Magkos Faidon,
Yoshino Jun,
Okunade Adewole L.,
Patterson Bruce W.,
Muehlbauer Michael J.,
Newgard Christopher B.,
Klein Samuel
Publication year - 2018
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.22129
Subject(s) - medicine , weight loss , endocrinology , insulin resistance , insulin , carbohydrate metabolism , glucose clamp technique , insulin sensitivity , metabolism , glucose uptake , obesity , chemistry
Objective Lactate is an intermediate of glucose metabolism that has been implicated in the pathogenesis of insulin resistance. This study evaluated the relationship between glucose kinetics and plasma lactate concentration ([LAC]) before and after manipulating insulin sensitivity by progressive weight loss. Methods Forty people with obesity (BMI = 37.9 ± 4.3 kg/m 2 ) were randomized to weight maintenance ( n = 14) or weight loss ( n = 19). Subjects were studied before and after 6 months of weight maintenance and before and after 5%, 11%, and 16% weight loss. A hyperinsulinemic‐euglycemic clamp procedure in conjunction with [6,6‐ 2 H 2 ]glucose tracer infusion was used to assess glucose kinetics. Results At baseline, fasting [LAC] correlated positively with endogenous glucose production rate (r = 0.532; P = 0.001) and negatively with insulin sensitivity, assessed as the insulin‐stimulated glucose disposal (r = −0.361; P = 0.04). Progressive (5% through 16%) weight loss caused a progressive decrease in fasting [LAC], and the decrease in fasting [LAC] after 5% weight loss was correlated with the decrease in endogenous glucose production (r = 0.654; P = 0.002) and the increase in insulin sensitivity (r = −0.595; P = 0.007). Conclusions This study demonstrates the interrelationships among weight loss, hepatic and muscle glucose kinetics, insulin sensitivity, and [LAC], and it suggests that [LAC] can serve as an additional biomarker of glucose‐related insulin resistance.