Cutaneous photobiology: past, present and future

Area of Science:

• Photobiology
• Biophysics
• Dermatology

Background:

• The study of light's biological effects emerged in the 19th century with UV and IR radiation discoveries.
• Early research by Raab, Tappeiner, Finsen, and Dorno established photodynamic action and phototherapy.
• The discovery of porphyrins and photosensitizing agents spurred investigations into phototoxicity and photoallergy.

Observation:

• Epidemiological links between solar radiation and skin conditions like actinic keratoses and non-melanoma skin cancer were noted.
• Animal studies by Findlay, Roffo, and Blum experimentally confirmed these links.
• Research from 1950-1975 focused on cellular and molecular aspects of photobiology.

Findings:

• Photochemistry of nucleic acids and DNA damage/repair mechanisms were elucidated.
• Understanding the fundamental biological processes of light interaction advanced significantly.
• The groundwork was laid for targeted phototherapy and disease prevention strategies.

Implications:

• Advances in photobiology promise novel phototherapy applications.
• Improved understanding facilitates the prevention of light-induced diseases, particularly skin cancer.
• Future research directions include harnessing light for therapeutic and preventative measures.