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| Gonzalez,T.P.; Mucenic,T.; Brenol,J.C.T.; Xavier,R.M.; Schiengold,M.; Chies,J.A.B.. |
| P-glycoprotein (Pgp), the ABCB1 gene product, acts as an efflux pump that transports a large variety of substrates and is a mechanism of cell protection against xenobiotics. An increasing number of studies have shown that some ABCB1 polymorphisms may affect Pgp expression and activity, as well as affecting the development and susceptibility to diseases and pharmacological response. High activity of Pgp has been detected in systemic lupus erythematosus (SLE) patients. The C1236T, G2677T/A, and C3435T are the most commonly studied single nucleotide polymorphisms in the ABCB1 gene. Therefore, their frequencies were determined in Brazilian individuals with European ancestry (N = 143) and in SLE patients (N = 137). Genotyping was performed by PCR-RFLP analysis... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: ABCB1; MDR1; P-glycoprotein; Polymorphism; Systemic lupus erythematosus. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000900005 |
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| RUMJANEK,VIVIAN M.; TRINDADE,GILMA S.; WAGNER-SOUZA,KAREN; MELETTI-DE-OLIVEIRA,MICHELE C.; MARQUES-SANTOS,LUIS F.; MAIA,RAQUEL C.; CAPELLA,MÁRCIA A. M.. |
| Multidrug resistance to chemotherapy is a major obstacle in the treatment of cancer patients. The best characterised mechanism responsible for multidrug resistance involves the expression of the MDR-1 gene product, P-glycoprotein. However, the resistance process is multifactorial. Studies of multidrug resistance mechanisms have relied on the analysis of cancer cell lines that have been selected and present cross-reactivity to a broad range of anticancer agents. This work characterises a multidrug resistant cell line, originally selected for resistance to the Vinca alkaloid vincristine and derived from the human erythroleukaemia cell K562. This cell line, named Lucena 1, overexpresses P-glycoprotein and have its resistance reversed by the chemosensitisers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multidrug resistance; Leukaemia; P-glycoprotein; Chemosensitisers. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000100007 |
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| Linardi,Renata Lehn; Natalini,Cláudio Corrêa. |
| (MDR1) gene expressed in tumor cells and also in several normal tissues, such as intestine, liver, kidney, blood-brain barrier, spinal cord, and placenta. P-gp has been identified in mice, rat, bovine, monkey, rodents, and human beings and has been receiving a particular clinical relevance because this protein expression limits brain access and intestinal absorption of many drugs. This protein plays a role as a protective barrier against a wide variety of substrates, avoiding drug entry into the central nervous system. P-glycoprotein also interferes with drug bioavailability and disposition, including absorption, distribution, metabolization, and excretion, influencing pharmacokinetic and pharmacodynamic of drugs. Modulation of P-gp may help the efficacy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MDR1 gene; P-glycoprotein; Therapeutics; Pharmacology. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000100056 |
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