sentences:  Other sebum-lowering medications such as topical antiandrogens, peroxisome proliferator-activated receptor modulators, and inhibitors of the stearoyl-CoA desaturase-1 enzyme are also a focus of research efforts.Particles that release nitric oxide into the skin to decrease skin inflammation caused by "C. acnes" and the immune system have shown promise for improving acne in early clinical trials.Another avenue of early-stage research has focused on how to best use laser and light therapy to selectively destroy sebum-producing glands in the skin's hair follicles to reduce sebum production and improve acne appearance.