Abstract:
OBJECTIVE:The objective of the present study was to evaluate whether germline methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms as well as polymorphisms in the thymidylate synthase gene promoter, namely the variable number tandem repeat polymorphism (TS VNTR) and the intrarepeat G to C single nucleotide polymorphism (TS SNP), are predictive markers of tumor regression in rectal cancer patients following preoperative chemoradiotherapy. BASIC METHODS:Blood samples from 125 patients with primary adenocarcinoma of the mid-low rectum who received 5-fluorouracil-based chemotherapy and external beam radiotherapy (median dose 48.4 Gy), 125 patients (women n=45, men n=80; median age 60 years, range 31-79 years) were genotyped. Response to preoperative treatment was evaluated employing the Tumor Regression Grade criteria. On the basis of the pathologic response, patients were classified as responders (TRG 1-2, n=48) and non-responders (TRG 3-5, n=74). Three patients were excluded because of insufficient data. MAIN RESULTS:Among the polymorphic variants examined, the MTHFR 677T-1298A haplotype was, upon univariate analysis, the only variable found associated with tumor regression (P=0.004). Moreover, at multivariate analysis, the MTHFR 677T-1298A haplotype was an independent predictor of tumor regression. Patients not carrying the MTHFR 677T-1298A haplotype (odds ratio 0.29, 95% confidence interval 0.13-0.64, P=0.002) displayed a higher response rate than patients with the MTHFR 677T-1298A haplotype. CONCLUSIONS:Unlike TS VNTR and SNP polymorphisms, MTHFR 677T-1298A haplotype in genomic DNA has the potential to be a predictive marker of tumor response in rectal cancer patients submitted to preoperative chemoradiotherapy.
journal_name
Pharmacogenet Genomicsjournal_title
Pharmacogenetics and genomicsauthors
Terrazzino S,Agostini M,Pucciarelli S,Pasetto LM,Friso ML,Ambrosi A,Lisi V,Leon A,Lise M,Nitti Ddoi
10.1097/01.fpc.0000230412.89973.c0subject
Has Abstractpub_date
2006-11-01 00:00:00pages
817-24issue
11eissn
1744-6872issn
1744-6880pii
01213011-200611000-00007journal_volume
16pub_type
临床试验,杂志文章abstract:OBJECTIVES:It has been shown that acetaldehyde is an active metabolite of ethanol with central actions that modulate behavior. Catalase has been proposed as the main enzyme responsible for the synthesis of acetaldehyde from ethanol in the brain. Recent studies, however, suggest that cytochrome, in particular the isofor...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e328324e726
更新日期:2009-03-01 00:00:00
abstract::The human cytochrome P450 2A6 (CYP2A6) enzyme metabolizes several xenobiotic compounds of clinical or toxicological importance. We aimed to identify genetic variants and major CYP2A6 haplotypes associated with CYP2A6 phenotypic variation. CYP2A6 mRNA level, protein level, activity and haplotypes were determined in Cau...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01.fpc.0000171517.22258.f1
更新日期:2005-09-01 00:00:00
abstract::Endocrine disrupters, such as persistent organohalogen pollutants (POPs) may cause hypospadias, which is a common congenital anomaly in males, affecting 0.2-0.7%. We hypothesized that hypospadias incidence would be high among Greenlanders, who are one of the most POP exposed populations on earth through consumption of...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01.fpc.0000199497.01101.93
更新日期:2006-05-01 00:00:00
abstract:OBJECTIVES:We aimed to assess a functional polymorphism in FCGR2A H131R, for association with the treatment response to Fc-containing inhibitors of tumor necrosis factor (TNF). METHODS:A total of 429 biologic-naive patients with rheumatoid arthritis collected in two sets (299 and 130) were treated during standard care...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000042
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate whether there is a genotype-by-treatment interaction in patients experiencing stroke and treated with one of three antihypertensive drugs, that is chlorthalidone, amlodipine, or lisinopril. PARTICIPANTS AND METHODS:A population of 436 African Americans and 539 whites ...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000088
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVES:Human novel oxidoreductase 1 (NDOR1) is a diflavin reductase closely related to cytochrome P450 reductase (POR) and nitric oxide synthase (NOS), which are involved in the metabolism of antitumour agents. A variant cDNA sequence of NDOR1, NDOR1 p.518-519ins9 or NDOR1_v1, has been deposited in GenBank (accessi...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01213011-200506000-00002
更新日期:2005-06-01 00:00:00
abstract::The genetically polymorphic cytochrome P450 2C9 (CYP2C9) metabolizes many important drugs. Among them, phenytoin has been used as a probe to determine CYP2C9 phenotype by measuring the urinary excretion of its major metabolite, S-enantiomer of 5-(4-hydroxyphenyl)-5-phenylhydantoin (p-HPPH). Phenytoin pharmacokinetic i...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01.fpc.0000174787.92861.91
更新日期:2005-11-01 00:00:00
abstract:INTRODUCTION:Cytochrome P450 1A2 (CYP 1A2) is responsible for more than 90% of caffeine clearance. A polymorphic variant of CYP1A2 (-163C>A) (rs762551) is associated with high CYP1A2 inducibility. Both caffeine and its main metabolite, paraxanthine, may be neuroprotective. The association between caffeine intake and ri...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e3282f09265
更新日期:2007-11-01 00:00:00
abstract:BACKGROUND/AIM:MicroRNAs (miRNAs) are small noncoding RNAs that have been implicated in mechanisms underlying various types of cancers including hepatocellular carcinoma (HCC). Reports have indicated that single nucleotide polymorphisms in miRNA-196A2 and miRNA-146A genes may contribute to the risk of progression of he...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000187
更新日期:2016-02-01 00:00:00
abstract::Vitamin D has potent anti-tumour properties. Calcitriol [1,25(OH)2D3], the hormonal derivative of vitamin D3, is an antiproliferative and prodifferentiation factor for several cell types, including human squamous cells of the head and neck. Several polymorphisms of the vitamin D receptor (VDR) gene have been described...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01213011-200503000-00004
更新日期:2005-03-01 00:00:00
abstract::Lipid changes with statin treatments vary greatly between individuals for reasons which are largely unknown. This study was performed to examine the genetic determinants of lipid responses to rosuvastatin in Chinese patients. A total of 125 polymorphisms in 61 candidate genes from 386 Chinese patients were analyzed fo...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32833de489
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:Recently, the minor allele of the rs13064411A>G polymorphism in the WD repeat domain 52 (WDR52) gene was associated with increased statin-induced proprotein convertase subtilisin/kexin type 9 (PCSK9) levels and with LDL cholesterol response to statins. PCSK9 promotes LDL receptor degradation, leading to incre...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000120
更新日期:2015-03-01 00:00:00
abstract:OBJECTIVE:As no single nucleotide polymorphism has emerged as pivotal to predict the lack of efficacy and dose-limiting toxicities to methotrexate (MTX), we evaluated the contribution of gene-gene interactions to the effects of this prodrug in rheumatoid arthritis. METHODS:A total of 255 patients treated with MTX for ...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32833315d1
更新日期:2009-12-01 00:00:00
abstract:OBJECTIVES:This study aimed to explore the influence of variation in DRD2, DRD3, CYP2D6, CYP3A4, and CYP3A5 genes on treatment resistance to typical neuroleptics in a Brazilian sample of patients with schizophrenia. METHODS:One polymorphism at DRD2 gene, five at DRD3, 24 at CYP2D6, nine at CYP3A4 gene, and one at CYP3...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e328301a763
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:Compared with genetic factors, drug interactions are largely unexplored in pharmacogenetic studies. This study sought to systematically investigate the effects of VKORC1, STX4A, CYP2C9, CYP4F2, CYP3A4, and GGCX gene polymorphisms and interacting drugs on warfarin maintenance dose. METHODS:A retrospective stu...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32834f45f9
更新日期:2012-03-01 00:00:00
abstract:BACKGROUND:Previous studies have shown that polymorphisms in the β2-adrenergic receptor gene (ADRB2) may influence bronchodilator response (BDR) to both β2-agonists and anticholinergics, possibly by intracellular cross-talk, but in opposite ways, in the Japanese population. We hypothesized that the preferential respons...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e328349daa1
更新日期:2011-11-01 00:00:00
abstract::Genome-wide studies have identified single nucleotide polymorphisms associated with smoking behaviour and nicotine dependence. Less is known about genetic determinants of smoking cessation, but rs4680 in COMT has recently been shown to explain a substantial proportion of the variation in cessation in the general popul...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32832fabf3
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:Irreversible hearing loss is a frequent side effect of the chemotherapeutic agent cisplatin and shows considerable interpatient variability. The variant rs1872328 in the ACYP2 gene was recently identified as a risk factor for the development of cisplatin-induced ototoxicity in children with brain tumors. We a...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000212
更新日期:2016-05-01 00:00:00
abstract::TPMT and NUDT15 polymorphisms are major determinants of tolerance to thiopurine drugs used in leukemias and nonmalignant immunologic disorders. We adopted an extreme discordant phenotype approach to explore the impact of Native American versus European ancestry on the distribution of TPMT and NUDT15 polymorphisms, and...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000388
更新日期:2020-01-01 00:00:00
abstract::The 1976C>T polymorphism in the adenosine A2A receptor gene (ADORA2A) modulates the psychological response to administration of the adenosine receptor antagonist caffeine. We quantified the vascular response to adenosine and caffeine to determine the relevance of this variant allele in the physiological response to th...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32803fb78f
更新日期:2007-07-01 00:00:00
abstract:BACKGROUND:P-glycoprotein (P-gp) is a multidrug efflux transporter that has a defined role in the absorption and disposition of drugs. Many studies have investigated the potential influence of ABCB1 polymorphisms on the disposition of its substrates. However, there remains significant controversy regarding the role of ...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e328360d10c
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND:5-Hydroxytryptamine 3 (5-HT3) receptors mediate the fast excitatory neurotransmission of serotonin. In this study, we have characterized the effects of four naturally occurring, nonsynonymous variants of the human 5-HT3B subunit on expression and signalling properties of heteromeric 5-HT3AB receptors. METHO...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e328310f950
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVES:Epidemiological studies documented associations between single nucleotide polymorphisms (SNPs) in the nucleotide excision repair gene XPD/ERCC2 and cancer risk. Little is known, however, about the underlying mechanisms for these associations. We explored a novel mechanism that could further explain the repor...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e3280115e63
更新日期:2007-11-01 00:00:00
abstract:BACKGROUND:The mammalian target of rapamycin (m-TOR) inhibitor sirolimus is an immunosuppressive drug used in kidney transplantation. m-TOR binds with Raptor and phosphorylates p70S6 kinase, a protein involved in numerous cell signalling pathways. We examined the association of candidate polymorphisms in m-TOR, Raptor ...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/FPC.0b013e328357359d
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVES:The effect of rifapentine plus isoniazid on efavirenz pharmacokinetics was characterized in AIDS Clinical Trials Group protocol A5279 (NCT01404312). The present analyses characterize pharmacogenetic interactions between these drugs, and with nevirapine. METHODS:A subset of HIV-positive individuals receiving...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000417
更新日期:2021-01-01 00:00:00
abstract:OBJECTIVE:Nicotine, the main addictive ingredient in tobacco, is metabolically inactivated to cotinine primarily by the hepatic enzyme CYP2A6. Considerable genetic variation in the CYP2A6 gene results in large variation in the rates of nicotine metabolism, which in turn alters smoking behaviours (e.g. amount of cigaret...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000026
更新日期:2014-02-01 00:00:00
abstract::Two recent screens for copy-number variations in the entire human genome found 12.4 gene copy number variations per person, including 2.5% of individuals with gains between 7q21.1 and 7q22.1, the chromosomal location of CYP3A4. CYP3A4 is involved in the metabolism of approximately 50% of all drugs, including many canc...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/01.fpc.0000194421.35641.70
更新日期:2006-06-01 00:00:00
abstract:OBJECTIVES:The emergency department (ED) is a challenging setting to conduct pharmacogenomic studies and integrate that data into fast-paced and potentially life-saving treatment decisions. Therefore, our objective is to present the methods and feasibility of a pilot pharmacogenomic study set in the ED that measured pe...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000414
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVE:Clinical response to topiramate can vary greatly in obese patients. Identifying genetic variants associated with treatment response could help gain insight into the mechanism of action of topiramate. Little is known about the relationship between genetic variability and topiramate treatment response. We perfo...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0000000000000185
更新日期:2016-02-01 00:00:00
abstract:OBJECTIVE:To examine the relationship between types and locations of mutations of the enzyme alpha-galactosidase (Gal) A in Fabry disease and the response to the pharmacological chaperone 1-deoxygalactonojirimycin (DGJ). METHODS:T cells grown from normal individuals or from patients with Fabry disease were tested for ...
journal_title:Pharmacogenetics and genomics
pub_type: 杂志文章
doi:10.1097/FPC.0b013e32830500f4
更新日期:2008-09-01 00:00:00