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Fatty Acid Intake and Bladder Cancer Risk: A Multicenter Case-Control Study in Iran.

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Dietary fatty acids (FAs) impact bladder cancer risk. Specific FAs, like stearic acid, show protective effects, while others increase risk. Tailoring FA intake, not total fat, is key for prevention.

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Area of Science:

  • Nutrition Science
  • Oncology
  • Epidemiology

Background:

  • Bladder cancer is a significant global health issue.
  • Established risk factors include smoking and occupational exposures.
  • The influence of dietary fatty acids (FAs) on bladder cancer risk is not well understood.

Purpose of the Study:

  • To investigate the association between dietary fatty acid intake and bladder cancer risk.
  • To identify specific fatty acid subtypes and consumption patterns linked to bladder cancer.
  • To explore potential sex-specific differences in these associations.

Main Methods:

  • The IROPICAN study included 711 bladder cancer cases and 3,297 controls.
  • Dietary intake was assessed using a validated food frequency questionnaire.
  • Principal component analysis (PCA) and multivariable logistic regression were employed to analyze data.

Main Results:

  • Specific fatty acid subtypes, not total fat, were associated with bladder cancer risk.
  • Stearic acid intake showed a protective effect (OR=0.28).
  • High intake of palmitoleic acid, alpha-linolenic acid (ALA), and docosapentaenoic acid (DPA) was linked to increased risk. Sex-specific effects were observed, with stearic acid protective in men and polyunsaturated fatty acids (PUFAs) in women.

Conclusions:

  • Dietary recommendations for bladder cancer prevention should focus on specific fatty acid subtypes.
  • Balancing fatty acid intake, including increasing omega-3s and reducing saturated fats, may be beneficial.
  • Understanding sex-specific roles of fatty acids is important for personalized dietary advice.