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1.
Anticancer Agents Med Chem ; 23(2): 222-226, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35585814

RESUMO

BACKGROUND: Xenografts of various human cancers in nude mice provide a helpful model in cancer research. This study aimed to develop a xenograft mouse model of MCF-7 breast cancer using injectable estradiol valerate. METHODS: Thirty healthy female C57 nu/nu mice were engrafted with three protocols to establish an MCF-7 tumor. Injectable estradiol valerate (10 mg/ml) was used as a substitute for estradiol pellets. The development of tumors was recorded daily, and data were statistically analyzed. Histology of bladder, kidney, and tumors was used to estimate tumor establishment and probable urinary adverse effects. RESULTS: According to the findings, the duration of MCF-7 tumor growth was the lowest for protocol B (tumor tissue). Also, this protocol had the highest xenograft yield within the shortest time duration (37 days for protocol B vs. 73 days for protocol A) without causing urinary adverse effects. CONCLUSION: Our findings revealed that estradiol valerate, which is way less expensive than estradiol pellets, can be used as a tumor proliferator to establish MCF-7 tumors with the highest yield when MCF-7 tumors have been used for xenograft.


Assuntos
Neoplasias da Mama , Humanos , Feminino , Camundongos , Animais , Camundongos Nus , Xenoenxertos , Células MCF-7 , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Estradiol/farmacologia
2.
J Pharmacol Sci ; 138(1): 71-75, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30293960

RESUMO

Cancer remains a major health problem around the world. A Shiga toxin is a bacterial toxin often produced by Shigella dysenteriae and Escherichia coli. A subunit of the Shiga toxin (StxA) is a cytotoxic agent which could be used to induce death in cancer cells. StxA expressed from baculovirus was evaluated in a pTriEx™ expression vector. The baculovirus vector was used for the A subunit delivery of StxA. StxA cell cytotoxicity was induced by the virus and assessed in the MCF7 and HeLa cell lines. In addition, the breast cancer cytotoxicity of the expressed StxA was also assessed in a cancer induced in mice. The cytotoxicity of the recombinant StxA baculovirus with different multiplicities of infection (MOI) was measured. The results showed that significant cytotoxicity can be induced on the mammalian epithelial breast cancer cell lines, MCF7 and HeLa cells with MOI ≥ 2. The results also showed that a malignant tumor induced by MCF7 could be inhibited in a mouse cancer model. Therefore, it can be concluded that StxA, expressed by baculovirus, could be used for in vitro and in vivo gene delivery. In this study StxA, delivered by the baculovirus inhibited cell proliferation, and eliminated HeLa and MCF7 cells, in vitro. In conclusion, this method can be used as a safe alternative for anticancer drug delivery inside cancer cells.


Assuntos
Antineoplásicos/farmacologia , Neoplasias da Mama/tratamento farmacológico , Sistemas de Liberação de Medicamentos/métodos , Escherichia coli , Técnicas de Transferência de Genes , Toxina Shiga/farmacologia , Animais , Baculoviridae , Neoplasias da Mama/patologia , Proliferação de Células/efeitos dos fármacos , Modelos Animais de Doenças , Vetores Genéticos , Humanos , Camundongos , Células Sf9
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