Interestingly, the benefits seen with metformin in treatments of polycystic ovary syndrome (PCOS), a condition partially caused by increased androgen signalling [44], could also be explained by metformin’s inhibitory effect on MID1 that results in reduction of androgen receptor translation and concomitantly in reduction of androgen synthesis via increase of PP2A. The gene discussed is PTPA; the disease is polycystic ovary syndrome.