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Obesity01:24

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Adult Zucker Obese fa/fa Rats Present Impaired Immunity and Oxidative-Inflammatory Responses.

Nuria María De Castro1,2, Mónica De la Fuente3,4, Lydia Giménez-Llort5,6

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Obese Zucker rats show premature aging signs, with impaired immune function and oxidative stress mirroring natural aging processes. This highlights obesity as a model for accelerated immunosenescence.

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Area of Science:

  • Immunology
  • Aging Research
  • Metabolic Disorders

Background:

  • Obesity is linked to chronic inflammation and oxidative stress, contributing to immunosenescence.
  • Obesity and aging share immune system impairment and oxidative/inflammatory states.
  • Obesity may serve as a model for accelerated immunosenescence.

Purpose of the Study:

  • To evaluate immune and redox parameters in Zucker fatty (fa/fa) rats.
  • To compare obese rats with Zucker lean (fa/+) and Wistar controls.
  • To assess parameters indicative of aging and health.

Main Methods:

  • Used Zucker fatty (fa/fa) rats and Zucker lean (fa/+) controls.
  • Included Wistar rats as an independent control group.
  • Analyzed phagocytic activity, NK cell function, lymphocyte proliferation, cytokine profiles, and redox parameters in multiple tissues.

Main Results:

  • Zucker fa/fa rats exhibited physiological disorders and premature immunosenescence.
  • Immune responses (innate and adaptive) were impaired.
  • Redox imbalance and altered cytokine profiles (reduced IL-2/IL-10, elevated TNF-α) were observed.

Conclusions:

  • Immune dysfunctions and oxidative imbalances in obese rats resemble those in natural aging.
  • Analyzed immune parameters indicate health, aging rate, and longevity.
  • Adult Zucker fa/fa rats display characteristics of premature aging.