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Hypoglycemia and Glucagon

Hypoglycemia and Glucagon

Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...

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Updated: Jul 2, 2025

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Published on: January 11, 2013

"Hyperglycemic Memory": Observational Evidence to Experimental Inference.

Mohsen Ahmadi¹, Soudeh Ghafouri-Fard¹, Parisa Najari-Hanjani²

¹Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Current Diabetes Reviews

|February 19, 2024

Summary

Early diabetes control impacts long-term health via hyperglycemic memory. This phenomenon, where transient high blood sugar (hyperglycemia) influences future complications, is explained by molecular mechanisms.

Keywords:

Diabetes advanced glycation end products epigenetics hyperglycemia.hyperglycemic memory legacy effect

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Last Updated: Jul 2, 2025

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Osmotic Minipump Implantation for Increasing Glucose Concentration in Mouse Cerebrospinal Fluid

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Published on: January 26, 2024

Area of Science:

Endocrinology and Metabolism
Molecular Biology
Diabetology

Background:

Epidemiological studies link hyperglycemia duration and level to diabetic complications.
Glycemic profiles alone do not fully explain complication severity or presence.
Genetic factors and hyperglycemic memory are recognized as key influences.

Purpose of the Study:

To review evidence supporting the concept of hyperglycemic memory.
To explore the molecular mechanisms underlying hyperglycemic memory.
To provide a molecular basis for the long-term effects of early glycemic control.

Main Methods:

Review of epidemiological studies and clinical trials (DCCT/EDIC, UKPDS).
Analysis of proposed molecular pathways involved in hyperglycemic memory.
Synthesis of evidence for molecular justification of hyperglycemic memory.

Main Results:

Early glycemic control has lasting protective or detrimental effects on diabetic complications.
Transient hyperglycemia can induce persistent cellular responses.
Several molecular mechanisms are implicated in hyperglycemic memory.

Conclusions:

Hyperglycemic memory is a significant factor in the pathobiology of diabetic complications.
Molecular phenomena like AGEs, ROS, PKC, epigenetic changes, and miRNAs mediate hyperglycemic memory.
Understanding these mechanisms is crucial for managing long-term diabetes outcomes.