Regulation of circadian behaviour and metabolism by synthetic REV-ERB agonists

Area of Science:

• Chronobiology
• Molecular Endocrinology
• Metabolic Disease Research

Background:

• Circadian rhythms are crucial for metabolic and cardiovascular health.
• Nuclear receptors REV-ERB-alpha and REV-ERB-beta regulate core clock proteins involved in activity and metabolism.
• Disruptions in these rhythms are linked to metabolic diseases.

Purpose of the Study:

• To identify and characterize potent synthetic agonists for REV-ERB.
• To investigate the effects of these agonists on circadian behavior and gene expression in vivo.
• To evaluate the therapeutic potential of REV-ERB agonists in metabolic disease models.

Main Methods:

• Identification of novel synthetic REV-ERB agonists.
• Administration of agonists to mice to assess effects on circadian behavior and gene expression.
• Analysis of gene expression patterns in hypothalamus, liver, skeletal muscle, and adipose tissue.
• Evaluation of metabolic parameters in diet-induced obese mice.

Main Results:

• Synthetic REV-ERB ligands modulated circadian behavior and core clock gene expression in the hypothalamus.
• Agonist treatment altered the circadian expression of metabolic genes in peripheral tissues, increasing energy expenditure.
• Obese mice treated with a REV-ERB agonist exhibited reduced fat mass, improved dyslipidemia, and ameliorated hyperglycemia.

Conclusions:

• Pharmacological targeting of circadian rhythms using synthetic REV-ERB ligands offers a novel therapeutic strategy.
• These ligands demonstrate potential benefits for treating metabolic diseases such as obesity, dyslipidemia, and hyperglycemia.
• Synthetic REV-ERB agonists may also hold therapeutic value for sleep disorders.