Bromelain nanoparticles protect against 7,12-dimethylbenz[a]anthracene induced skin carcinogenesis in mouse model.
Eur J Pharm Biopharm
; 91: 35-46, 2015 Apr.
Article
em En
| MEDLINE
| ID: mdl-25619920
ABSTRACT
Conventional cancer chemotherapy leads to severe side effects, which limits its use. Nanoparticles (NPs) based delivery systems offer an effective alternative. Several evidences highlight the importance of Bromelain (BL), a proteolytic enzyme, as an anti-tumor agent which however has been limited due to the requirement of high doses at the tumor site. Therefore, we illustrate the development of BL loaded poly (lactic-co-glycolic acid) NPs that show enhanced anti-tumor effects compared to free BL. The formulated NPs with a mean particle size of 130.4 ± 8.81 nm exhibited sustained release of BL. Subsequent investigation revealed enhanced anti-tumor ability of NPs in 2-stage skin tumorigenesis mice model. Reduction in average number of tumors (â¼ 2.3 folds), delay in tumorigenesis (â¼ 2 weeks), percent tumorigenesis (â¼ 4 folds), and percent mortality rate as well as a reduction in the average tumor volume (â¼ 2.5 folds) in mice as compared to free BL were observed. The NPs were found to be superior in exerting chemopreventive effects over chemotherapeutic effects at 10 fold reduced dose than free BL, validated by the enhanced ability of NPs (â¼ 1.8 folds) to protect the DNA from induced damage. The effects were also supported by histopathological evaluations. NPs were also capable of modulating the expression of pro-apoptotic (P53, Bax) and anti-apoptotic (Bcl2) proteins. Therefore, our findings demonstrate that developed NPs formulation could be used to improve the efficacy of chemotherapy by exerting chemo-preventive effects against induced carcinogenesis at lower dosages.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
/
Neoplasias Cutâneas
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Portadores de Fármacos
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Bromelaínas
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Anticarcinógenos
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Nanopartículas
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Carcinogênese
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Eur J Pharm Biopharm
Assunto da revista:
FARMACIA
/
FARMACOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Índia