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Intrathoracic fat in HIV-infected patients.

J L Blanco1, A Biglia, E Martinez

  • 1Infectious Diseases Unit, Hospital Clinic-Institut d'Investigaciones Biomediques August Pi i Sunyer, University of Barcelona, Barcelona, Spain. jlblanco@clinic.ub.es

HIV Medicine
|April 25, 2006
PubMed
Summary
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HIV infection increases intrathoracic fat in adults without lipodystrophy, regardless of antiretroviral therapy. This excess fat correlates with intra-abdominal fat, highlighting potential metabolic changes in HIV patients.

Area of Science:

  • Medical imaging and human physiology.
  • Infectious diseases and metabolic complications.

Background:

  • The effects of Human Immunodeficiency Virus (HIV) infection and its treatment on intrathoracic fat are not well understood.
  • Previous research has not clarified whether antiretroviral therapy influences fat distribution within the chest.

Purpose of the Study:

  • To investigate and compare intrathoracic fat content in HIV-infected adults and healthy controls.
  • To determine if antiretroviral therapy impacts intrathoracic fat accumulation in HIV patients.

Main Methods:

  • Computed tomography (CT) scans were used to assess thoracic and abdominal fat volumes.
  • HIV-infected patients and healthy controls, matched for age, gender, and BMI, were recruited.
  • Patients were categorized based on antiretroviral therapy exposure.

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Main Results:

  • HIV-infected patients had significantly higher intrathoracic fat content compared to healthy controls.
  • No significant difference in intrathoracic fat was observed between HIV-infected patients on antiretrovirals and those not on therapy.
  • Intrathoracic fat showed a positive correlation with intra-abdominal fat in both HIV-infected individuals and controls.

Conclusions:

  • HIV infection is associated with increased intrathoracic fat, even in the absence of clinical lipodystrophy.
  • Antiretroviral therapy does not appear to significantly alter intrathoracic fat levels in this cohort.
  • The correlation between intrathoracic and intra-abdominal fat suggests a systemic impact on fat distribution in HIV patients.