Radiation pneumonitis (null)

Radiation pneumonitis is not a molecule or receptor but rather an inflammatory condition of the lungs that occurs as a side effect of radiation therapy, especially in patients treated for thoracic malignancies such as lung or breast cancer. It is characterized by inflammation and damage to lung tissue, leading to symptoms like shortness of breath, cough, chest pain, fever, malaise, and sometimes flu-like symptoms. The onset typically occurs between 1 week and 6 months after completion of radiation treatment but can be delayed up to 12 months. The pathophysiology involves loss of type I pneumocytes in the irradiated area, increased capillary permeability causing edema, infiltration by inflammatory cells such as neutrophils and macrophages, release of cytokines/chemokines/adhesion molecules including ICAM‑1, and overproduction/release into circulation of surfactant proteins SP-A/SP-D from type II pneumocytes[1][2][7]. Treatment is primarily with corticosteroids to reduce inflammation; other supportive therapies include bronchodilators for airway opening and oxygen supplementation if needed. If left untreated or in severe cases it may progress to chronic scarring known as radiation fibrosis, which can cause permanent loss of lung function[3][5]. Because "Radiation pneumonitis" refers to a clinical syndrome rather than a discrete molecular target such as a receptor or enzyme—and does not represent a canonical drug target—this entry should be flagged as incorrect for use in structured molecular target databases. --- Key points supporting 'is_incorrect': Radiation pneumonitis is not itself a molecule/receptor/enzyme/transporter/etc., but an adverse clinical event resulting from tissue response after irradiation; thus it does not fit standard definitions for therapeutic targets used in pharmacology or drug development contexts[1][7].

Other names

Radiation-induced pneumonitisRPRadiation lung injury (acute phase)

Anti-inflammatory action via immunosuppression (corticosteroids) Airway dilation and symptom relief (bronchodilators) Symptom management for cough and congestion