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Blood pressure reduction due to hemoglobin glycosylation in type 2 diabetic patients

Pedro Cabrales1, Miguel A Salazar Vázquez, Beatrizy Salazar Vázquez

  • 1La Jolla Bioengineering Institute, La Jolla, California, USA.

Vascular Health and Risk Management
|December 11, 2008
PubMed

Insights

Glycosylation of hemoglobin (HbA1c) may lower blood pressure in type 2 diabetes patients not treated for hypertension. However, hypertension treatment might negate this effect, potentially due to endothelial dysfunction.

Area of Science:

  • Endocrinology
  • Cardiovascular Medicine
  • Metabolic Disorders

Background:

  • Glycosylation of hemoglobin (HbA1c) is a marker of glycemic control in diabetes.
  • The relationship between HbA1c and hypertension risk is not fully understood.
  • Endothelial function plays a crucial role in blood pressure regulation.

Purpose of the Study:

  • To investigate whether hemoglobin glycosylation is a risk factor for hypertension.
  • To explore the association between HbA1c levels and mean arterial pressure (MAP) in diabetic individuals.
  • To examine the influence of hypertension treatment on the relationship between HbA1c and MAP.

Main Methods:

  • Cross-sectional study of 129 diabetic subjects without specific comorbidities.
  • Measurement of mean arterial pressure (MAP) and glycosylated hemoglobin (HbA1c).
  • Analysis of the correlation between MAP and HbA1c, with and without adjustment for hypertension treatment.

Main Results:

  • MAP was not directly correlated with HbA1c concentration when all patients were included.
  • In untreated hypertensive patients, higher HbA1c levels were associated with lower MAP.
  • In patients treated for hypertension, higher HbA1c levels were associated with higher MAP.

Conclusions:

  • Hemoglobin glycosylation may exert an antihypertensive effect in type 2 diabetic patients not receiving hypertension treatment.
  • Hypertension treatment in diabetic patients may be linked to endothelial dysfunction, potentially masking the blood pressure-lowering effect of HbA1c.
Abstract

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