Nuclear Hormone Receptors and metabolism

5 important questions on Nuclear Hormone Receptors and metabolism

How does the binding of estrogen to its receptor cause chromatin remodelling?

  1. Recruitment of co-activator
  2. acetylation of histone
  3. binding of the remodelling engine
  4. chromatin remodelling
  5. recruitment of RNA polymerase 2


This histone acetylation can be removed by Histone deacetylases (HDACs)

What is the difference between PPAR-y and PPAR-a?

PPAR-y
  • is active in adipose and uptake/store fats (agonist is Thiazolidinediones = TZDs)

PPAR-a
  • is active in liver and burn fat (agonists is fibrates)

What does Cortisol (glucocorticoid hormone)?

  • Released from adrenal cortex (bijnieren) in response to fasting and chronic stress
  • bind nuclear receptor GR and modulate gene expression, among which enzymes involved in metabolism
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What are the 3 drug against Glucocorticoid?

  • Hydrocortisone
  • Prednisone
  • Prednisolone

What are the long-term effects of cortisol

  • Activates: lipolysis, protein degradation, Gluconeogenesis, Blood glucose levels, beta-Oxidation
  • Inhibits: Protein synthesis


Leads to increase of insuline > glycogen synthesis and fat synthesis increase

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