Glycosylated hemoglobin in endogenous hypertriglyceridemia

Area of Science:

• Endocrinology
• Metabolic Disorders
• Clinical Chemistry

Background:

• Endogenous hypertriglyceridemia is a metabolic condition.
• Assessing glucose tolerance is crucial for managing metabolic health.
• Glycosylated hemoglobin (GHb) is a marker for long-term glucose control.

Purpose of the Study:

• To investigate the relationship between GHb levels and glucose tolerance in patients with endogenous hypertriglyceridemia.
• To determine if GHb measurement alone is sufficient for diagnosing impaired glucose tolerance in this population.
• To assess the impact of plasma turbidity on GHb assay accuracy.

Main Methods:

• Fifty outpatients with endogenous hypertriglyceridemia underwent glucose tolerance tests (OGTT) and GHb measurement.
• Patients were categorized into normal glucose tolerance (NGT), impaired glucose tolerance (IGT), and non-insulin-dependent diabetes mellitus (NIDDM) groups.
• GHb was also measured in hemolysates with and without plasma triglycerides to evaluate turbidity effects.

Main Results:

• GHb levels were significantly correlated with fasting and post-prandial glucose levels in NIDDM patients.
• GHb levels correlated with peak, area, and 2-h plasma glucose in NGT and IGT groups.
• Nine out of 15 IGT patients had normal GHb levels, indicating GHb alone is not diagnostic for IGT.
• Plasma turbidity did not affect GHb measurement accuracy with the employed method.

Conclusions:

• GHb values are related to glucose tolerance status in hypertriglyceridemic individuals.
• Glycosylated hemoglobin measurement alone is inadequate for diagnosing impaired glucose tolerance.
• The assay method used is reliable for GHb evaluation in hypertriglyceridemic patients, unaffected by plasma turbidity.