Related Experiment Video

Updated: Sep 26, 2026

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
07:29

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein

Published on: October 12, 2017

Early vascular damage in primary hypoalphalipoproteinemia

Gaetano Vaudo1, Simona Marchesi, Graziana Lupattelli

  • 1Department of Internal Medicine, Angiology, and Atherosclerosis, University of Perugia, Perugia, Italy.

Metabolism: Clinical and Experimental
|March 21, 2003
PubMed

Insights

Hypoalphalipoproteinemia (hypoalpha), a condition of low HDL cholesterol, is linked to impaired arterial function and increased intima-media thickness, indicating higher atherosclerosis risk. This study reveals endothelial dysfunction and arterial thickening in individuals with hypoalpha.

Area of Science:

  • Cardiovascular Medicine
  • Metabolic Disorders
  • Arterial Physiology

Background:

  • Hypoalphalipoproteinemia (hypoalpha) is characterized by reduced high-density lipoprotein (HDL) cholesterol levels.
  • The precise relationship between hypoalpha and the development of atherosclerotic disease remains incompletely understood.
  • Arterial structural and functional changes may precede overt cardiovascular events in individuals with hypoalpha.

Purpose of the Study:

  • To investigate arterial functional and structural alterations in subjects with primary hypoalpha.
  • To compare endothelial function and large artery thickness between individuals with hypoalpha and healthy controls.
  • To determine the association between HDL cholesterol levels, triglycerides, and arterial parameters in subjects with hypoalpha.

Main Methods:

  • Cross-sectional study comparing 19 subjects with hypoalpha and 21 healthy controls.
  • Assessment of brachial-artery flow-mediated vasodilation (FMV) to evaluate endothelial function.
  • Measurement of carotid and femoral intima-media thickness (IMT) to assess arterial structure.

Main Results:

  • Subjects with hypoalpha exhibited significantly lower FMV (5.6% vs 8.2%) compared to controls, indicating impaired endothelial function.
  • Increased IMT was observed in the internal carotid (0.83 vs 0.69 mm) and superficial femoral arteries (0.83 vs 0.68 mm) of hypoalpha subjects.
  • HDL cholesterol positively correlated with FMV and inversely with IMT, while triglycerides showed opposite correlations.

Conclusions:

  • Primary hypoalpha is associated with impaired endothelial function and increased large-artery IMT, even in the absence of overt cardiovascular disease.
  • HDL cholesterol emerged as a significant predictor of both endothelial function (FMV) and arterial thickness (IMT).
  • These findings suggest that hypoalpha may represent an independent risk factor for atherosclerosis, necessitating further investigation and management strategies.

Related Concept Videos

Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Atherosclerosis I: Introduction01:30

Atherosclerosis I: Introduction

Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
Peripheral Artery Disease I: Introduction01:30

Peripheral Artery Disease I: Introduction

Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...