In humans, the CYP17A1 gene is largely associated with endocrine effects and steroid hormone metabolism.    Furthermore, mutations in the CYP17A1 gene are associated with rare forms of congenital adrenal hyperplasia, in particular 17α-hydroxylase deficiency/17,20-lyase deficiency and isolated 17,20-lyase deficiency. Overall, CYP17A1 is an important target for inhibition in the treatment of prostate cancer because it produces androgen that is required for tumor cell growth.   Currently, the FDA has approved only one CYP17A1 inhibitor, abiraterone, which contains a steroidal scaffold that is similar to the endogenous CYP17A1 substrates. Abiraterone is structurally similar to the substrates of other cytochrome P450 enzymes involved in steroidogenesis, and interference can pose a liability in terms of side effects. Using nonsteroidal scaffolds is expected to enable the design of compounds that interact more selectively with CYP17A1.  Potent inhibitors of the CYP17A1 enzyme provide a last line defense against ectopic androgenesis in advanced prostate cancer. 
The StAR protein was first identified, characterized and named by Dr. Douglas Stocco at Texas Tech University Health Sciences Center in 1994.  The role of this protein in lipoid CAH was confirmed the following year in collaboration with Dr. Walter Miller at the University of California, San Francisco .  All of this work follows the initial observations of the appearance of this protein and its phosphorylated form coincident with factors that caused steroid production by Dr. Nanette Orme-Johnson while at Tufts University . 
Thyroid hormones T3 and T4 also have a part to play in body weight regulation. These hormones determine the rate of metabolism for all the cells in your body. Hypothyroidism or an underactive thyroid can cause your metabolism to become sluggish and bring on weight gain. You may also experience tiredness and constant fatigue that make exercise and activity a challenge. Digestion too can take a hit, making the balance of thyroid hormones vital to weight loss. 11 While it cannot be cured fully, hypothyroidism can be managed with these steps .