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A Human Randomized Controlled Trial Comparing Metabolic Responses to Single and Repeated Hypoglycemia in Type 1 Diabetes.
- Source :
- Journal of Clinical Endocrinology & Metabolism; Dec2020, Vol. 105 Issue 12, p1-13, 13p
- Publication Year :
- 2020
-
Abstract
- <bold>Aims: </bold>Hypoglycemia hinders optimal glycemic management in type 1 diabetes (T1D). Long diabetes duration and hypoglycemia impair hormonal counter-regulatory responses to hypoglycemia. Our study was designed to test whether (1) the metabolic responses and insulin sensitivity are impaired, and (2) whether they are affected by short-lived antecedent hypoglycemia in participants with T1D.<bold>Materials and Methods: </bold>In a randomized, crossover, 2x2 factorial design, 9 male participants with T1D and 9 comparable control participants underwent 30 minutes of hypoglycemia (p-glucose < 2.9 mmol/L) followed by a euglycemic clamp on 2 separate interventions: with and without 30 minutes of hypoglycemia the day before the study day.<bold>Results: </bold>During both interventions insulin sensitivity was consistently lower, while counter-regulatory hormones were reduced, with 75% lower glucagon and 50% lower epinephrine during hypoglycemia in participants with T1D, who also displayed 40% lower lactate and 5- to 10-fold increased ketone body concentrations following hypoglycemia, whereas palmitate and glucose turnover, forearm glucose uptake, and substrate oxidation did not differ between the groups. In participants with T1D, adipose tissue phosphatase and tensin homolog (PTEN) content, hormone-sensitive lipase (HSL) phosphorylation, and muscle glucose transporter type 4 (GLUT4) content were decreased compared with controls. And antecedent hypoglycemic episodes lasting 30 minutes did not affect counter-regulation or insulin sensitivity.<bold>Conclusions: </bold>Participants with T1D displayed insulin resistance and impaired hormonal counter-regulation during hypoglycemia, whereas glucose and fatty acid fluxes were intact and ketogenic responses were amplified. We observed subtle alterations of intracellular signaling and no effect of short-lived antecedent hypoglycemia on subsequent counter-regulation. This plausibly reflects the presence of insulin resistance and implies that T1D is a condition with defective hormonal but preserved metabolic responsiveness to short-lived hypoglycemia. [ABSTRACT FROM AUTHOR]
- Subjects :
- TYPE 1 diabetes
HYPOGLYCEMIA
RANDOMIZED controlled trials
TYPE 2 diabetes
BLOOD sugar
LACTATES
GLYCEMIC index
LIPID metabolism
RESEARCH
GLUCOSE clamp technique
SKELETAL muscle
RESEARCH methodology
GENETIC disorders
MEDICAL cooperation
EVALUATION research
INSULIN
DISEASE relapse
COMPARATIVE studies
LIPID metabolism disorders
CROSSOVER trials
STATISTICAL sampling
ADIPOSE tissues
INSULIN resistance
Subjects
Details
- Language :
- English
- ISSN :
- 0021972X
- Volume :
- 105
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of Clinical Endocrinology & Metabolism
- Publication Type :
- Academic Journal
- Accession number :
- 147164409
- Full Text :
- https://doi.org/10.1210/clinem/dgaa645