5-Fluorouracil Worsens Oral Mucositis via Inflammation and Fibroblast Imbalance

The chemotherapy drug 5-Fluorouracil (5-FU) has been identified as a factor that exacerbates oral mucositis, a painful inflammation of the mucous membranes in the mouth. This exacerbation is linked to two key mechanisms: increased inflammation and an imbalance in the extracellular matrix mediated by fibroblasts. Oral mucositis is a common and debilitating side effect of chemotherapy, significantly impacting a patient's quality of life and ability to tolerate treatment. The drug's action on oral tissues appears to disrupt the delicate balance required for healthy mucosal lining. Specifically, 5-FU seems to trigger inflammatory responses that damage the oral tissues. Concurrently, it affects fibroblasts, which are crucial cells responsible for maintaining the structure and integrity of tissues by producing and organizing the extracellular matrix. The imbalance created by 5-FU's influence on fibroblasts leads to a breakdown in the normal matrix structure, further contributing to the severity of mucositis. Understanding these specific pathways is crucial for developing targeted interventions to mitigate this side effect. Future research may focus on strategies to counteract the inflammatory cascade and support fibroblast function during 5-FU treatment.