Selective Photothermolysis to Target Sebaceous Glands: Theoretical Estimation of Parameters and Preliminary Results Using a Free Electron Laser

The study explored the feasibility of using selective photothermolysis (SP) to target sebaceous glands, which are part of hair follicles, as a potential treatment for acne. Researchers used free electron laser (FEL) pulses at specific infrared wavelengths to induce thermal damage selectively in sebaceous glands without harming the epidermis. The study found that natural and artificial sebum had absorption peaks that could be targeted by lasers, resulting in significant heating of sebaceous glands compared to water. Histological analysis confirmed selective thermal damage to sebaceous glands, suggesting that optical pulses at approximately 1,720 or 1,210 nm, delivered with appropriate skin cooling, could offer an alternative acne treatment.