Wasting in HIV infection and AIDS

Area of Science:

• Infectious Diseases
• Metabolic Disorders
• Nutrition Science

Background:

• AIDS wasting syndrome (AWS) is a complex condition in HIV infection.
• It involves multiple pathophysiological processes occurring at different stages of illness.
• Acute wasting is linked to infections, while chronic wasting is associated with gastrointestinal disease.

Purpose of the Study:

• To elucidate the multifactorial nature of AIDS wasting.
• To examine the roles of energy expenditure, nutrient intake, and metabolic abnormalities.
• To assess the potential of nutritional support and the impact of new therapies.

Main Methods:

• Review of pathophysiological processes in AIDS wasting.
• Analysis of energy expenditure and nutrient intake dynamics.
• Examination of metabolic derangements in protein and lipid metabolism.

Main Results:

• Wasting is driven by reduced total energy expenditure, primarily due to decreased intake.
• Metabolic abnormalities in protein and lipid metabolism are present beyond reduced intake.
• Impaired lean tissue accrual response to nutrition observed; nutritional support may prolong survival.

Conclusions:

• AIDS wasting is multifactorial, involving infections, GI disease, reduced intake, and metabolic dysfunction.
• Nutritional interventions may improve survival but do not fully resolve wasting.
• Wasting remains a challenge in HIV patients, even with antiviral therapies like protease inhibitors.