How does bleomycin cause pulmonary fibrosis?
The lung injury seen following bleomycin comprises an interstitial oedema with an influx of inflammatory and immune cells. This may lead to the development of pulmonary fibrosis, characterized by enhanced production and deposition of collagen and other matrix components.
What is bleomycin mechanism of action?
Bleomycin is a glycopeptide antibiotic with a unique mechanism of antitumor activity. The drug binds to guanosine-cytosine-rich portions of DNA via association of the “S” tripeptide and by partial intercalation of the bithiazole rings.
What is bleomycin pulmonary toxicity?
Bleomycin is an antineoplastic agent with potential for producing pulmonary toxicity, attributed in part to its free radical-promoting ability. Clinical and research experiences have suggested that the risk of bleomycin-induced pulmonary injury is increased with the administration of oxygen.
Can bleomycin cause lung nodules?
Patients with bleomycin-induced pneumonitis present with nonproductive cough, dyspnea on exertion, and bibasilar rales. Chest x-ray may show pulmonary nodules. A decline in carbon monoxide diffusing capacity (DLCO) is the earliest sign of lung toxicity; bleomycin should be discontinued if it occurs.
Is bleomycin toxicity reversible?
Although bleomycin pulmonary toxicity is thought to be dose-related, recent reports have emphasized severe reactions at low doses. Furthermore, severe pulmonary toxicity has been suggested to be progressive, irreversible, and ultimately, fatal.
What classification is bleomycin?
Bleomycin is an anti-cancer (“antineoplastic” or “cytotoxic”) chemotherapy drug. Bleomycin is classified as an “antitumor antibiotic.” (For more detail, see “How Bleomycin Works” section below).
What are the long term effects of bleomycin?
The chemo drug bleomycin can damage the lungs, as can radiation therapy to the chest. This can lead to problems like shortness of breath, which might not show up until years after treatment. Smoking can also seriously damage the lungs, so it’s important that people who have had these treatments do not smoke.
What category is bleomycin?
Bleomycin is classified as an antitumor antibiotic.
What causes bleomycin toxicity?
The mechanism of bleomycin toxicity is unclear and likely multifactorial. Oxidative damage, release of inflammatory cytokines, a deficiency of the bleomycin hydroxylase enzyme in the lungs and genetic predisposition have been described. 1 The time to onset of BIP can vary significantly.
