Ultraviolet rays can be harmful to our skin and pave the way to the onset of skin cancers.
VIB researchers connected to Ghent University have demonstrated that the caspase-14 protein - whose function has been unknown up to now - not only plays a role in maintaining the balance of moisture in the skin but also offers protection against UVB rays. Future strategies that increase the production of caspase-14 will open new possibilities for fortifying the skin as a barrier against all kinds of stress.
Sunbathing and the pernicious consequences for our skin
Sunlight is needed for the development of our bodies and minds. Still, we should not expose ourselves to it too often. The UV index provides an indication of the true intensity of the sun's rays and the risks that go along with them.
UV rays cause functional alterations in the most important components of our skin: the keratinocytes. In addition to causing normal sunburn and suppressing our immune responses, UVB damages the DNA in our cells, which can lead to cancer. In the last 15 years, the number of new cases of melanoma (the most dangerous skin cancer in Belgium) has practically doubled to 1500 cases per year.
Caspase-14
Caspases are proteins that are involved in inflammation reactions and in programmed cell death or apoptosis. Apoptosis is important in all stages of life. During embryonal development, for example, apoptosis ensures that undesirable or outmoded tissues disappear. In the mid-1990s, Peter Vandenabeele and his colleagues were able to isolate 9 caspase family members in mice. The properties and substrates of a number of caspases are already known. However, caspase-14 is a maverick in that it is found very specifically in the skin and is activated during the last stage of skin cell maturation. Due to the action of caspase-14, the outer epidermis of our skin contains dead cells that are released as flakes of skin.