Cited by 195Diabetes Management and ResearchDiabetes Treatment and ManagementPancreatic function and diabetes

Altered Hierarchy of Protective Responses Against Severe Hypoglycemia in Normal Aging in Healthy Men

Matyka, Krystyna, Evans, Mark, Lomas, Jill, Cranston, Iain, Macdonald, Ian, Amiel, Stephane A·1997·Diabetes Care

Abstract

OBJECTIVE: To investigate the effect of normal aging on the protective responses against hypoglycemia, in view of the fact that type II diabetes is primarily a disease of aging, and its treatment is associated with risk of hypoglycemia with cognitive impairment. RESEARCH DESIGN AND METHODS: Plasma glucose was lowered stepwise from 5 to 2.4 mmol/l and restored by manipulation of an infusion of 20% glucose during 220-min intravenous infusion of 1.5 mU · kg−1 · min−1 soluble insulin in 14 men; 7 were aged 60–70 years and the other 7 were 22–26 years. Changes in neurohumoral responses, subjective awareness, and choice reaction time were assessed. RESULTS: Hormonal responses were similar in the two groups, but symptoms began earlier in the younger men (at a plasma glucose of 3.6 ± 0.1 vs. 3.0 ± 0.2 mmol/l, P = 0.02) and were more intense (P = 0.03). Four-choice reaction time, a measure of psychomotor coordination, deteriorated earlier in the older men (at a plasma glucose of 3.0 ± 0.1 vs. 2.6 ± 0.1 mmol/l, P = 0.07) and to a greater degree. The difference between the glucose level for subjective awareness of hypoglycemia and the onset of cognitive dysfunction was lost in the older men (0.0 ± 0.2 vs. 0.8 ± 0.1 mmol/l, P < 0.007). CONCLUSIONS: Older men are prone to more severe cognitive impairment during hypoglycemia than younger men and are less likely to experience prior warning symptoms if blood glucose falls. This effect of normal aging may contribute to the risk of severe hypoglycemia in older diabetic patients treated with sulfonylureas and insulin.

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Crossref · 10.2337/diacare.20.2.135

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Authors
Matyka, K., Evans, M., Lomas, J., Cranston, I., Macdonald, I., & Amiel, S. A.
Affiliations
  • King's College London (GB)
  • Queen's Medical Centre (GB)
Venue
Diabetes Care
Published
1997-02-01
Volume
20
Issue
2
Pages
135-141
ISSN
  • 0149-5992 (ISSN-L)
  • 1935-5548
OpenAlex
W2125220286
Cited by
195
References
30
Citations by year
2026: 5 · 2025: 1 · 2024: 8 · 2023: 4 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 7 · 2018: 11 · 2017: 11 · 2016: 9 · 2015: 11 · 2014: 11 · 2013: 9 · 2012: 12
FWCI
1.41
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes Care (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
hypoglycemia, aging, cognitive impairment, neurohumoral response, reaction time, insulin-induced hypoglycemia, type 2 diabetes, sulfonylureas, older men
MeSH terms
Adult, Aged, Aging, Blood Glucose, Blood Pressure, C-Peptide, Cognition, Epinephrine, Glucagon, Heart Rate, Humans, Hydrocortisone, Hypoglycemia, Insulin, Male, Middle Aged, Psychomotor Performance, Glucose Clamp Technique, Cohort Studies, Human Growth Hormone

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