PTGR1 is known as leukotriene B4 12-hydroxydehydrogenase (LTB4DH), which is capable of inhibiting lung cancer growth in nude mice and inactivating prostaglandins and the leukocyte chemoattractant leukotriene B4 (LTB4) [45, 46]. Here, PTGR1 is linked to lung carcinoma.