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Hypoglycemia-associated autonomic failure in advanced type 2 diabetes.

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Segel, Scott A., Paramore, Deanna S., Cryer, Philip E.·2002·Diabetes

Abstract

We tested the hypotheses that the glucagon response to hypoglycemia is reduced in patients who are approaching the insulin-deficient end of the spectrum of type 2 diabetes and that recent antecedent hypoglycemia shifts the glycemic thresholds for autonomic (including adrenomedullary epinephrine) and symptomatic responses to hypoglycemia to lower plasma glucose concentrations in type 2 diabetes. Hyperinsulinemic stepped hypoglycemic clamps (85, 75, 65, 55, and 45 mg/dl steps) were performed on two consecutive days, with an additional 2 h of hypoglycemia (50 mg/dl) in the afternoon of the first day, in 13 patients with type 2 diabetes—7 treated with oral hypoglycemic agents (OHA RX; mean [±SD] HbA1c 8.6 ± 1.1%) and 6 requiring therapy with insulin for an average of 5 years and with reduced C-peptide levels (insulin RX, HbA1c 7.5 ± 0.7%)—and 15 nondiabetic control subjects. The glucagon response to hypoglycemia was virtually absent (P = 0.0252) in the insulin-deficient type 2 diabetic patients (insulin RX mean [±SE] final values of 52 ± 16 vs. 93 ± 15 pg/ml in control subjects and 98 ± 16 pg/ml in type 2 diabetic patients, OHA RX on day 1). Glucagon (P = 0.0015), epinephrine (P = 0.0002), and norepinephrine (P = 0.0138) responses and neurogenic (P = 0.0149) and neuroglycopenic (P = 0.0015) symptom responses to hypoglycemia were reduced on day 2 after hypoglycemia on day 1 in type 2 diabetic patients; these responses were not eliminated, but their glycemic thresholds were shifted to lower plasma glucose concentrations. In addition, the glycemic thresholds for these responses were at higher-than-normal plasma glucose concentrations (P = 0.0082, 0.0028, 0.0023, and 0.0182, respectively) at baseline (day 1) in OHA RX type 2 diabetic patients, with relatively poorly controlled diabetes. Because the glucagon response to falling plasma glucose levels is virtually absent and the glycemic thresholds for autonomic and symptomatic responses to hypoglycemia are shifted to lower glucose concentrations by recent antecedent hypoglycemia, patients with advanced type 2 diabetes, like those with type 1 diabetes, are at risk for hypoglycemia-associated autonomic failure and the resultant vicious cycle of recurrent iatrogenic hypoglycemia.

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Crossref · 10.2337/diabetes.51.3.724

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  • As patients approach the insulin-deficient end of the spectrum of type 2 diabetes mellitus, typically over many years, their insulin and glucagon responses to falling glucose levels are lost, as in type 1 diabetes mellitus.

    “Thus, as patients approach the insulin-deficient end of the spectrum of T2DM (118), typically over many years, their insulin and glucagon responses to falling glucose levels are lost (90), as in T1DM.”

    From Evaluation and Management of Adult Hypoglycemic Disorders: An Endocrine Society Clinical Practice Guideline (2009) · cites this paper as [90]

    The Discussion (page not specified) reports that the glucagon response to hypoglycemia was virtually absent in patients with insulin-deficient type 2 diabetes, as in type 1 diabetes. It documents reduced C-peptide levels as evidence of insulin deficiency, but does not establish that these patients lost the insulin response to falling glucose; the paper explicitly describes that response as lost in established type 1 diabetes. (LLM, conf=0.83)

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  • With prolonged duration of type 2 diabetes as often seen in elderly patients, the glucagon response to hypoglycemia is virtually absent.

    “With the prolonged duration of type 2 diabetes as is often seen in the elderly patient, the glucagon response to hypoglycemia is virtually absent (55).”

    From Hypoglycemia and Diabetes: A Report of a Workgroup of the American Diabetes Association and The Endocrine Society (2013) · cites this paper as [55]

    The Discussion reports a virtually absent glucagon response to hypoglycemia in patients with advanced, insulin-deficient type 2 diabetes. The finding was specific to that group; the paper does not establish that prolonged diabetes duration alone, or older age, predicts the response. Patients with type 2 diabetes treated with oral agents did not show the same reduction (Responses to hypoglycemia on day 1; page unavailable). (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • In patients with long-standing type 2 diabetes mellitus, glycemic thresholds for sympathoadrenal responses are shifted to lower plasma glucose concentrations by recent antecedent hypoglycemia, as in type 1 diabetes mellitus.

    “Furthermore, their glycemic thresholds for sympathoadrenal responses are shifted to lower plasma glucose concentrations by recent antecedent hypoglycemia (90), as in T1DM.”
  • The relevance of basing a biochemical definition for hypoglycaemia on the glycaemic threshold for secretion of glucagon can be disputed, as glucagon secretion becomes deficient at an early stage of type 1 diabetes and in type 2 diabetes when pancreatic beta cell failure is present.

    “The relevance of basing a biochemical definition for hypoglycaemia on the glycaemic threshold for secretion of glucagon can also be disputed, as this becomes deficient at an early stage of type 1 diabetes [12] and in type 2 diabetes when pancreatic beta cell failure is present [13].”

    From Defining hypoglycaemia: what level has clinical relevance? (2009) · cites this paper as [13]

  • In elderly patients with diabetes, the glucagon response to hypoglycemia is virtually absent.

    “diabetes as is often seen in the elderly patient, the glucagon response to hypoglycemia is virtually absent (55).”

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Authors
Segel, S. A., Paramore, D. S., & Cryer, P. E.
Affiliations
Washington University in St. Louis (US)
Venue
Diabetes
Published
2002-03-01
Volume
51
Issue
3
Pages
724-733
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2169041612
Cited by
337
References
45
Citations by year
2026: 4 · 2025: 5 · 2024: 9 · 2023: 11 · 2022: 6 · 2021: 9 · 2020: 23 · 2019: 8 · 2018: 19 · 2017: 7 · 2016: 15 · 2015: 19 · 2014: 11 · 2013: 20 · 2012: 13
FWCI
8.40
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Diabetes Association
  • National Institutes of Health (5p60dk020579-35)
  • U.S. Public Health Service (P60-DK-20579)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P60-DK20579, R01-DK-27085, T32 DK07120, R01DK027085, T32DK007120)
  • National Center for Research Resources (M01-RR00036, M01RR000036)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
hypoglycemia-associated autonomic failure, type 2 diabetes, insulin deficiency, epinephrine response, norepinephrine response, neuroglycopenic symptoms, glycemic thresholds, hypoglycemic clamp, oral antidiabetic drugs, insulin therapy
MeSH terms
Adult, Autonomic Nervous System, Blood Glucose, C-Peptide, Diabetes Mellitus, Type 2, Epinephrine, Female, Glucagon, Glycated Hemoglobin, Humans, Hypoglycemia, Insulin, Kinetics, Male, Middle Aged, Norepinephrine, Glucose Clamp Technique

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