Scientists researching what causes an itch in skin conditions such as eczema and dermatitis have made a major breakthrough .
A groundbreaking study by Harvard Medical School scientists, published in the journal Cell, has revealed that bacteria, specifically Staphylococcus aureus (S. aureus), can directly cause itch by activating nerve cells in the skin. This discovery challenges the previous belief that itch in conditions like eczema and atopic dermatitis solely resulted from skin inflammation. The common bacterium S. aureus was found to release an enzyme that induces the urge to scratch.
Approximately 31.6 million people in the U.S. (10.1% of the population) suffer from some form of eczema, with prevalence peaking in early childhood, according to the National Eczema Association.
The research, conducted in mice and human cells, unveiled a promising treatment avenue. The scientists observed that using an already approved anticlotting drug blocking a protein called PAR1 halted itching in mice. This novel mechanism behind itch opens up new possibilities for understanding and treating inflammatory skin conditions.
Study co-author Isaac Chiu, an associate professor of immunology at Harvard Medical School, emphasized that the study identified a unique connection between the bacterium Staph aureus and itch, showcasing that the microbe itself can be an itch trigger. a major breakthrough
While some experts highlight the need for additional human studies, others express optimism that this breakthrough could lead to new treatment options for managing itch and conditions like eczema. The researchers plan to explore whether other microbes besides S. aureus can also induce itch, with an interest in understanding the evolutionary significance of microbes causing itch.