Research Article

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02/19/2008
Breast cancer; Chemotherapy; P-glycoprotein; Polymorphism

Primary chemotherapy is a useful strategy for the treatment of locally advanced breast cancer and therefore allows in vivo evaluation of the action of cytotoxic drugs and the possibility of accomplishing conservative breast surgeries, as well as the early treatment of metastasis. Mechanisms of resistance to the drugs include the action of protein associated with the efflux of drugs from ... more

F.F.O. Rodrigues; R.E. Santos; M.B. Melo; M.A.L.G. Silva; A.L. Oliveira; R.L. Rozenowicz; L.B. Ulson; T. Aoki
10/31/2014
Chemotherapy; Excision repair cross-complementation group 1; Non-small cell lung cancer; Single nucleotide polymorphism; Survival time

We conducted a cohort study to investigate the role of 3 single-nucleotide polymorphisms of the excision repair cross-complementation group 1 (ERCC1) gene on the response to chemotherapy and clinical outcomes of non-small cell lung cancer (NSCLC). A total of 163 patients with newly diagnosed and histopathologically confirmed primary NSCLC were examined in our study and were ... more

H. Gao; R.C. Ge; H.Y. Liu; Y. Wang; S. Yan
05/16/2014
Chemotherapy; Gene polymorphism; Lung cancer; Meta-analysis; Platinum; XRCC1

X-ray repair cross complementing group 1(XRCC1) polymorphisms have been implicated in interindividual variability of efficacy of platinum chemotherapy for treating non-small cell lung cancer (NSCLC); however, results of different studies have been inconsistent. We conducted a meta-analysis to investigate the association between polymorphisms in the XRCC1 gene and ... more

L. Li; C. Wan; F.Q. Wen
03/06/2014
Chemotherapy; Gastric cancer; Meta-analysis; Polymorphism; XRCC1

It is still controversial whether X-ray repair cross-complementing group (XRCC1) gene polymorphisms (Arg194Trp and Arg399Gln) are associated with the clinical outcome of platinum-based chemotherapy in gastric cancer patients based on published studies. Meta-analysis was performed to provide a systematic review of the findings. Eligible articles from the PubMed, SinoMed, and CNKI ... more

J. Xu; J. Ma; H.T. Zong; S.Y. Wang; J.W. Zhou
01/14/2014
Chemotherapy; Non-small cell lung cancer; XPD; XRCC1

Individual differences in chemosensitivity and clinical outcome of non-small-cell lung carcinoma (NSCLC) patients can be influenced by host-inherited factors. We investigated the impact of XRCC1 Arg194Trp, XRCC1 Arg280His, XRCC1 Arg399Gln, XPD Arg156Arg, XPD Asp312Asn, XPD Asp711Asp, and XPD Lys751Gln gene polymorphisms on ... more

L. Zhang; W. Ma; Y. Li; J. Wu; G.Y. Shi
04/30/2015
Chemotherapy; Clinical outcome; Osteosarcoma; Vascular endothelial growth factors

We investigated the association between vascular endothelial growth factor (VEGF) gene +1612G/A, -634C/G, and +936G/C and the clinical outcome of osteosarcoma. Genomic DNA was isolated from blood samples, and 3 VEGF gene polymorphisms (+1612G/A, -634C/G, and +936G/C) were analyzed using polymerase chain reaction-restriction fragment length polymorphism. Of the 194 patients, 82 patients ( ... more

X.D. Li; D.D. Yu; J.R. Lu; C. Wu; W.X. Jin
12/12/2002
Aspergillus nidulans; ATP-binding cassette transporters; Fungal infections; Multidrug resistance

As a preliminary step towards characterizing genes encoding ATP-binding cassette (ABC) transporters that confer pleiotropic drug resistance in Aspergillus, we used a PCR-based approach to isolate four DNA fragments corresponding to different ABC type transporter genes. DNA sequencing and Southern blot analysis confirmed that they were distinct genes, which were designated ... more

A.Mendes do Nascimento; M.Helena S. Goldman; G.H. Goldman
03/30/2003
Antimicrobials; Drug tolerance; Efflux pumps; Multidrug resistance; Pseudomonas

Pseudomonas aeruginosa is an opportunistic human pathogen exhibiting innate resistance to multiple antimicrobial agents. This intrinsic multidrug resistance is caused by synergy between a low-permeability outer membrane and expression of a number of broadly-specific multidrug efflux (Mex) systems, including MexAB-OprM and MexXY-OprM. In addition to this ... more

H.P. Schweizer
12/09/2008
Multidrug resistance; multidrug resistance protein; Single nucleotide polymorphism

One of the main problems in treating cancer patients is that cancer cells can develop drug resistance. Resistance to multiple anticancer drugs, so called multidrug resistance (MDR), most likely involves a nonspecific mode of resistance, through drug-efflux transporters. One of the most extensively studied genes involved in MDR is multidrug resistance protein 1 (MRP1). We investigated ... more

F. Mahjoubi; S. Akbari; M. Montazeri; F. Moshyri
01/12/2010
Breast cancer; C3435T polymorphism; MDR1 gene; Multidrug resistance; Real-time polymerase chain reaction

One of the limitations in the treatment of cancer patients with chemotherapy is the development of multidrug resistance (MDR). A well-known mechanism responsible for drug resistance is over-expression of ABC-transporter genes such as MDR1. This gene encodes p-glycoprotein (P-gp), a transmembrane glycoprotein that transports many hydrophobic substrates and anti-cancer drugs out of the cell ... more

M. Taheri; F. Mahjoubi; R. Omranipour

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