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Nuclear Hormone Receptors

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Nuclear hormone receptors (NHRs) are the second largest receptor target class, targeted by 116 different drugs and the third largest family of individual drug targets, at a total of 13% of drug targets in the human genome (Figure 4.2). NHRs can divided into the following subfamilies: steroid receptor family, thyroid/retinoid receptor family, and orphan receptor family. The steroid receptor family is the most clinically targeted subfamily amongst the NHRs, encompassing for almost 80% of all NHR-targeting drugs. This family includes glucocorticoid receptors (GR), progesterone receptors (PR), oestrogen receptors (ER), androgen receptors (AR), and mineralocorticoid receptors (MR). The more recent advances in this field are the selective ER modulators …show more content…

The VDRs are the most commonly targeted receptors in this class, by 8% of all NHR-targeting drugs. PPARs are involved in the regulation of gene expression in lipid and lipoprotein metabolism, inflammation, and glucose homeostasis. Due to their diversity of potential therapeutic actions, they are attractive targets for the development of oral drugs for metabolic syndromes such as cardiovascular diseases and type 2 diabetes. PPAR-α agonists, which make up 3% of all NHR-targeting drugs, belong to the fibrate class of drugs (bezafibrate, ciprofibrate, fenofibrate, gemfibrozil). These drugs act by increasing high-density lipoprotein (HDL) levels and decreasing triglyceride levels. The PPAR-γ agonist pioglitazone is an antidiabetic drug that increases insulin sensitivity and glucose …show more content…

These drugs are used as anti-inflammatory medication for various disorders such as psoriasis or eczema. Corticosteroids inhibit a variety of the processes associated with inflammation and immune response. The anti-inflammatory and immunosuppressive properties of corticosteroids are mainly caused by their inhibitory action on eicosanoid synthesis and cytokine production from lymphocytes. The inhibition of these compounds also has further effects for other mediators of inflammation and the immune responses53. Corticosteroids inhibit both bradykinin formation and the migration of white blood cells into the site of inflammation. They reduce granulation tissue formation by inhibiting the proliferation of fibroblasts and blood vessels. As for the immune system, steroids decrease the production of interleukin (IL) -2, which subsequently decrease the action of T-helper cells and the clonal proliferation of T

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