title: Effect of acute and chronic paraquat on rat lung collagen content.
abstract: The effect of acute and chronic paraquat administration on rat lung collagen was studied. A single dose of paraquat (35 mg/kg, ip) produces a transient increase in lung collagen synthesis within the first several days. In animals sacrificed 18 days later, there is insignificant accumulation of collagen (9%). Three injections of paraquat (25 mg/kg) spaced at weekly intervals produces a 31% increase in lung collagen by the middle of the fourth week. In view of the technical difficulties involved with the use of paraquat as a pulmonary fibrotic agent in the rat, search for an alternative model is suggested.
mesh_terms: D000818:Animals; D003094:Collagen / Q000378:metabolism*; D006909:Hydroxyproline / Q000378:metabolism; D066298:In Vitro Techniques; D008168:Lung / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D010269:Paraquat / Q000494:pharmacology*; D014176:Protein Biosynthesis; D051381:Rats; D013268:Stimulation, Chemical; D013997:Time Factors
chemical_list: D003094:Collagen; D010269:Paraquat; D006909:Hydroxyproline