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How pathogens drive adipose tissue loss in the host.

Abdulbasit Amin1, David V Ferreira2, Luisa M Figueiredo2

  • 1Gulbenkian Institute for Molecular Medicine, Edificio Egas Moniz, Avenida Professor Egas Moniz, 1649-028 Lisbon, Portugal; Department of Physiology, Faculty of Basic Medical Sciences, University of Ilorin, Ilorin, Nigeria.

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Infections cause significant weight loss by reducing muscle and fat mass. This review examines how excessive lipolysis (fat breakdown) during infection impacts host survival and pathogen success.

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Area of Science:

  • Infectious diseases
  • Metabolic disorders
  • Host-pathogen interactions

Background:

  • Weight loss is a common symptom of infections caused by bacteria, fungi, and parasites.
  • This phenomenon is often linked to anorexia and the body's need to mobilize internal energy reserves to combat pathogens.
  • Both muscle and fat mass are significantly reduced during infection, impacting overall body composition.

Purpose of the Study:

  • To review the regulators of adipose tissue depletion through excessive lipolysis during infection.
  • To explore the probable mechanisms driving this fat loss.
  • To assess the potential consequences for host survival and pathogen fitness.

Main Methods:

  • Literature review of existing studies on infection-induced weight loss.
  • Analysis of mechanisms regulating lipolysis in the context of infection.
  • Examination of the interplay between host metabolism and pathogen survival.

Main Results:

  • Adipose tissue loss via excessive lipolysis is a critical factor in infection-related weight loss, influencing disease outcomes.
  • Specific regulators and mechanisms driving lipolysis during infection are identified.
  • The extent of fat loss can significantly affect host survival and pathogen fitness.

Conclusions:

  • Adipose tissue depletion is a key, yet often underappreciated, component of infection-induced cachexia.
  • Understanding the regulation of lipolysis during infection is crucial for developing therapeutic strategies.
  • Modulating lipolysis could offer novel approaches to improve host outcomes and combat infectious diseases.