Cited by 45Diabetes Management and ResearchPancreatic function and diabetesDiabetes Treatment and Management

Amelioration of Hypoglycemia Via Somatostatin Receptor Type 2 Antagonism in Recurrently Hypoglycemic Diabetic Rats

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Yue, Jessica T.Y., Riddell, Michael C., Burdett, Elena, Coy, David H., Efendic, Suad, Vranic, Mladen·2013·Diabetes

Abstract

Selective antagonism of somatostatin receptor type 2 (SSTR2) normalizes glucagon and corticosterone responses to hypoglycemic clamp in diabetic rats. The purpose of this study was to determine whether SSTR2 antagonism (SSTR2a) ameliorates hypoglycemia in response to overinsulinization in diabetic rats previously exposed to recurrent hypoglycemia. Streptozotocin diabetic rats (n = 19), previously subjected to five hypoglycemia events over 3 days, received an insulin bolus (10 units/kg i.v.) plus insulin infusion (50 mU/kg/min i.v.) until hypoglycemia ensued (≤3.9 mmol/L) (experimental day 1 [Expt-D1]). The next day (Expt-D2), rats were allocated to receive either placebo treatment (n = 7) or SSTR2a infusion (3,000 nmol/kg/min i.v., n = 12) 60 min prior to the same insulin regimen. On Expt-D1, all rats developed hypoglycemia by ∼90 min, while on Expt-D2, hypoglycemia was attenuated with SSTR2a treatment (nadir = 3.7 ± 0.3 vs. 2.7 ± 0.3 mmol/L in SSTR2a and controls, P < 0.01). Glucagon response to hypoglycemia on Expt-D2 deteriorated by 20-fold in the placebo group (P < 0.001) but improved in the SSTR2a group (threefold increase in area under the curve [AUC], P < 0.001). Corticosterone response deteriorated in the placebo-treated rats on Expt-D2 but increased twofold in the SSTR2a group. Catecholamine responses were not affected by SSTR2a. Thus, SSTR2 antagonism after recurrent hypoglycemia improves the glucagon and corticosterone responses and largely ameliorates insulin-induced hypoglycemia in diabetic rats.

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  • In rats with chemically induced or autoimmune diabetes, counter-regulatory glucagon secretion can be restored by SSTR antagonists.

    “In rats with chemically induced or autoimmune diabetes, counter-regulatory glucagon secretion can be restored by SSTR antagonists4–7”

    From Loss of electrical β-cell to δ-cell coupling underlies impaired hypoglycaemia-induced glucagon secretion in type-1 diabetes (2024) · cites this paper as [4]

    The Abstract reports that SSTR2 antagonism improved the glucagon response to hypoglycemia in streptozotocin-diabetic rats, and Research Design and Methods identifies streptozotocin injection as the means of inducing diabetes. The paper does not report an autoimmune-diabetes rat group. Its Discussion also says the response after recurrent hypoglycemia was not fully restored, so “restored” overstates this study’s finding. (LLM, conf=0.88)

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Authors
Yue, J. T. Y., Riddell, M. C., Burdett, E., Coy, D. H., Efendic, S., & Vranic, M.
Affiliations
  • University of Toronto (CA)
  • York University (CA)
  • Tulane University (US)
  • Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
  • Department of Physiology, University of Toronto, Toronto, Ontario, Canada
Corresponding author
Riddell, Michael C.
Venue
Diabetes
Published
2013-06-14
Volume
62
Issue
7
Pages
2215-2222
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2164739927
Cited by
45
References
51
Citations by year
2026: 1 · 2025: 4 · 2024: 7 · 2023: 4 · 2022: 3 · 2021: 8 · 2020: 5 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 4 · 2013: 3 · 2012: 1
FWCI
2.36
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
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
somatostatin receptor 2, recurrent hypoglycemia, insulin-induced hypoglycemia, glucagon response, streptozotocin-induced diabetes, catecholamine response
MeSH terms
Animals, Blood Glucose, Body Weight, Catecholamines, Diabetes Mellitus, Experimental, Eating, Glucagon, Hypoglycemia, Insulin, Peptides, Cyclic, Receptors, Somatostatin, Rats

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