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Possible in vivo mechanisms involved in photodynamic therapy using tetrapyrrolic macrocycles BJMBR
Filip,A.G.; Clichici,S.; Daicoviciu,D.; Ion,R.M.; Tatomir,C.; Rogojan,L.; Opris,I.; Mocan,T.; Olteanu,D.; Muresan,A..
Photodynamic therapy (PDT) mediated by oxidative stress causes direct tumor cell damage as well as microvascular injury. To improve this treatment new photosensitizers are being synthesized and tested. We evaluated the effects of PDT with 5,10,15,20-tetrakis(4-methoxyphenyl)-porphyrin (TMPP) and its zinc complex (ZnTMPP) on tumor levels of malondialdehyde (MDA), reduced glutathione (GSH) and cytokines, and on the activity of caspase-3 and metalloproteases (MMP-2 and -9) and attempted to correlate them with the histological alterations of tumors in 3-month-old male Wistar rats, 180 ± 20 g, bearing Walker 256 carcinosarcoma. Rats were randomly divided into five groups: group 1, ZnTMPP+irradiation (IR) 10 mg/kg body weight; group 2, TMPP+IR 10 mg/kg body...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Photodynamic therapy; Oxidative stress; Apoptosis; Tetrapyrrolic macrocycles; Cytokines.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000100008
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