Consequences of low-intensity light at night on cardiovascular and metabolic parameters in spontaneously hypertensive rats

Jun 29, 2019Canadian journal of physiology and pharmacology

Effects of dim light at night on heart and metabolism in rats with high blood pressure

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Abstract

Exposure to artificial light at night (ALAN) for 5 weeks increased systolic blood pressure in spontaneously hypertensive rats.

  • A loss of light-dark variability in systolic blood pressure was observed in rats exposed to ALAN.
  • Systolic blood pressure showed a gradual increase over the 5-week exposure to ALAN.
  • ALAN exposure resulted in higher plasma insulin and hepatic triglyceride levels.
  • Increased expression of certain metabolic transcription factors was found in epididymal fat tissue of the ALAN group.
  • Decreased expression of these factors was noted in the heart of rats exposed to ALAN.

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