Prostaglandin (PG), an active substance composed of a class of unsaturated fatty acid existing in the animal and human body, has many physiological functions. It was first found in human semen and thought to be released by the prostate gland. It has been proven that prostaglandin in semen mainly comes from seminal vesicles, while many tissue cells throughout the body can produce prostaglandin. Prostaglandin (PG) is synthesized from the arachidonic acid in the body and is a 20-carbon unsaturated fatty acid in the structure of a five-ring and two side chains.
According to its structure, prostaglandin is classified into A, B, C, D, E, F, G, H, I, etc. Different types of prostaglandin have different functions. Prostagin plays a significant role in the endocrine system, reproductive system, digestive system, respiratory system, cardiovascular and bronchial smooth muscle, urinary and nervous system. According to the different effect, Bimatoprost, Latanoprost, travoprost, PG-Cl/Cloprostenol sodium, Lubiprostone, Alprostadil are the products with relatively significant effects nowadays.