H L McLeod

..Although such an approach has theoretical appeal as a means of enhancing quality and improving outcomes in this setting, several obstacles currently exist and slow the progress toward clinical application...

..This study describes Pyrosequencing assays for key SNPs in CYP3A4 (CYP3A4*1B, CYP3A4*2, and CYP3A4*3) and CYP3A5 (CYP3A5*3C and CYP3A5*6)...

..This review will discuss recent clinically relevant examples of cancer pharmacogenetics and how genetic differences are helping to shape the future of individualized cancer chemotherapy...

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..Likewise, DFS may be decreased in patients with mucinous tumours who receive 5-FU. The presence of mucin should be carefully evaluated in developmental trials of new agents for treating colorectal cancer...

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..This review will highlight areas of progress with use of molecular approaches to improve the prediction of tumor response, towards the goal of optimized therapy for each individual patient...

..Recent studies defined target starting doses for mercaptopurine based on TPMT genotypes. This polymorphism is one of the best models for the translation of genomic information to guide patient therapeutics...

..A subgroup analysis of a multisite National Cancer Institute-sponsored trial (N9741) was performed comparing outcomes of black and white patients with metastatic CRC receiving uniform treatment...

..Experts have hypothesized that genotype becomes irrelevant once international normalized ratio (INR) values are available because INR response reflects warfarin sensitivity...

..The power and utility of the mouse as an experimental system for pharmacogenomic discovery will also be discussed in the context of cancer therapy...

..Alternatively, the role of CYP1B1 in estrogen metabolism may influence the risk of invasive or paclitaxel resistant breast cancer in patients carrying the CYP1B1*3 allele...

..14, one-sided P = 0.03). CALU rs339097 A>G is associated with higher warfarin dose requirements, independent of known genetic and nongenetic predictors of warfarin dose in African Americans...

..The mixture model approach has the highest recovery probability to recover the true partition in the simulation studies. Its applications are exemplified in interim data analyses for two cancer studies...

..In addition, we studied the correlation between certain genotypes of enzymes involved in irinotecan metabolism with efficacy and toxicity...

..Oxaliplatin, gemcitabine and capecitabine are all active agents against upper gastrointestinal and pancreaticobiliary cancers...

..We report that Cox-1 and Cox-2 expression is highly variable in Dukes' C tumours, and changes in Cox-1 expression may be of importance...

..Prospective confirmation of the impact of TSER on outcome, after TS-targeted chemotherapy, will define the utility of pharmacogenetics to optimize the selection of 5-FU therapy for colorectal cancer...

..We undertook a retrospective candidate gene haplotype association study to investigate this hypothesis...

..Functional analysis of the novel polymorphisms described in this study is now warranted to identify putative roles in drug metabolism...

..Cluster analysis identified a variety of tumours with the same pharmacological profile. The anatomy independence of drug pathways stimulates efforts to move away from our traditional approaches to the selection of cancer therapy...

..Understanding the influence of ethnicity on pharmacogenomics will allow for comprehensive strategies for using the genome to optimize therapy for patients throughout the world...

..This study was designed to describe the frequencies of multiple myocardial infarction (MI) risk-associated genotypes among different racial groups...

..Whether such differences contribute to a differential response to MTX in patients with RA deserves to be investigated...

..Prospective, perioperative pharmacogenetics-based dosing of warfarin is feasible; however, further evaluation in a randomized, controlled study is recommended...

..In addition, the need for polygenic pharmacogenomic strategies to identify patients at risk for adverse drug reactions will be highlighted...

..These results provide experimental validation and estimated allele frequencies for polymorphisms in three common ethnic groups and facilitate applied pharmacogenetic studies of anticancer drugs...

..This review will discuss clinically relevant examples of gene polymorphisms that influence toxicity and the experimental tools that have been utilized for discovering toxicity-related polymorphisms...

..Assays details for Pyrosequencing of clinically relevant polymorphisms are described in this chapter...

..Validation of these predictive factors in prospective clinical trials is now necessary to allow for a rational and systematic individualization of cancer therapy...

..Further studies are needed to see if functional relationships are the same across populations...

..This review highlights the current status of work in this field and addresses strategies that hold promise for future advances in pharmacogenomics...

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..Prospective screening of patients prior to chemotherapy selection may reduce the frequency of severe toxicities by allowing alternate therapy selections for patients carrying the UGT1A1*28 polymorphism...

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..However, no associations between these polymorphisms and mortality have been demonstrated...

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..Its accuracy and ease of use make CANDID a highly useful tool in study design and analysis for complex human traits...

..Endovascular lung perfusion (ELP) is a technique designed to deliver high doses of cisplatin via the pulmonary artery for the treatment of lung tumors. The purpose of the current study was to evaluate variables that affect adduct formation...

..The screens identified genes in well-characterized DNA, in addition to genes whose role in DNA-damage-response pathways had not previously been established...

..This heterodimer binds to the nuclear receptor response elements of downstream genes such as ABCB1, CYP2C, and CYP3A. This study determined the extent of NR1I2 variation in three world populations...

..DNA variations in metabolism, transport and drug target genes may contribute to chemotherapy efficacy and toxicities. The status of the identification of genetic markers for breast cancer therapy selection is highlighted in this review...

..However, this relies on the assumption that germline DNA is representative of the tumor genotype. To date, there has been little attention paid to defining the relationship between tumor and germline genomes...

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..We examined the influence of MTX transporter gene polymorphisms on MTX toxicity in 2 racial groups of patients with RA...

..Annotation of CNVs in the mouse genome combined with sequence-based analysis provides an important resource that will help define the genetic basis of complex traits...

..These variations in gene expression could provide valuable insights for optimizing treatment selection for patients with colorectal cancer...

..This review will discuss clinically relevant examples of genetic polymorphisms that influence the outcome of drug therapy, and possibilities for future applications of pharmacogenomics...

..This data provides a foundation on which prospective screening studies can be planned to identify patients at risk for severe toxicity from azathioprine therapy...

..However, this combination chemotherapy regimen has an unacceptable rate of febrile neutropenia. This regimen needs to be modified to reduce the incidence of febrile neutropenia...

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..DNA repair is conducted by distinct pathways of genes, many of which are thought to be altered in colorectal cancer. However, there has been little characterization of these pathways in colorectal cancer...

..001). In conclusion, the maintenance warfarin dose can be estimated from demographic, clinical, and pharmacogenetic factors that can be obtained at the time of warfarin initiation...

..In addition, the identified pattern of low haplotype diversity suggests that the mouse is likely to be useful for pharmacogenomic discovery by associating haplotype blocks with drug response phenotypes among inbred strains...

..This study provides the first look into the population frequency of these compound genotypes, and it provides the necessary first step for future evaluation of polygenic strategies to individualize therapy for heart failure...

..The genotype assays for genetic variants relevant to warfarin are widely used and are being developed for commercial use (5), making the promise of a pharmacogenetics-based approach a near reality...

..Further study of ELP evaluating the acute and chronic effects of repeated treatment administration is warranted...

..This information on ERCC2 genomic structure will allow the construction of definitive studies to clarify the clinical role of this important gene...

..To facilitate use of these pharmacogenetic and clinical algorithms, we developed a nonprofit website, http://www.WarfarinDosing.org...

..This review describes some of the recent advances in pharmacogenomics research...

..The PharmacoGenetics for Every Nation Initiative is a first step to making pharmacogenetics applicable on a global level...

..These data support the usefulness of the CEPH panel in pharmacogenetic discovery efforts for European-derived populations...

..PolyMAPr can be obtained from http://pharmacogenomics.wustl.edu...

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..Up-regulation of c-Jun and Fra-1 is an early event in human colorectal tumorigenesis. Overexpression of Fra-2 may participate in tumor progression...

..A comprehensive pharmacogenetics approach to warfarin therapy has the potential to improve the safety and efficiency of warfarin initiation...

..This phenotypic and genotypic variation among inbred strains provides a framework for cyclophosphamide pharmacogenomic discovery...

..Our study indicates that gene expression profiling could be valuable for predicting tumor response to chemotherapy and for tailoring therapy to individual cancer patients...

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..These drugs have implications for both the prevention of colorectal carcinoma and the potential treatment of the disease...

..An ongoing placebo-controlled randomized trial will further determine what role HCQ plays in preventing GVHD after allografting...

..There are many scientific and non-scientific concerns that should be addressed in future studies...

..PromoLign could be applied to a variety of SNPs and transcription related studies, including association genetics, population genetics, and pharmacogenetics...

..This review will place in context clinically relevant pharmacogenomic discovery approaches, including the relative strengths and weaknesses and the challenges inherent with achieving the goal of individualized therapy...

..However, a significant number of patients with RA either do not benefit from the drug or are unable to tolerate it. Pharmacogenetic approaches may help optimise treatment with MTX, and also other agents, in RA...

..In this article, disadvantages and advantages associated with each approach (GDEPT, VDEPT, and ADEPT) and future perspective for improving current systems are discussed...

..009). Treatment with PEG-LD 25 mg m(-2) in combination with valspodar results in a moderate prolongation of total doxorubicin clearance and half-life but did not increase the toxicity of this agent...

..There was a trend toward poorer survival in patients whose cancers had either gain or loss of ZNF217...

..5 +/- 10.5, n = 37). A subject with CYP2A6*17 / CYP2A6*17 revealed the lowest cotinine/nicotine ratio (1.8). We found a novel allele in black subjects that affects the nicotine metabolism in vitro and in vivo...

..This review focuses on pharmacogenomics studies conducted to gain insight into the molecular determinants of chemosensitivity to cancer chemotherapeutics...

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..The purpose was to explore the relationships between irinotecan disposition and allelic variants of genes coding for adenosine triphosphate binding cassette transporters and enzymes of putative relevance for irinotecan...

..The aim of this study was to evaluate the ethnic distribution and potential functional consequence of the ABCG2 421C>A genotype in cancer patients treated with irinotecan...

..15). Overall, this study indicates that ABCB1 genotype might be correlated with tipifarnib pharmacokinetics, although considerable overlap in exposure measures between genotype groups was observed...

..This comprehensive study of 4 populations extends our understanding of nicotine metabolism and the impact of genetic polymorphisms of the CYP2A6 gene...

..We performed an exploratory analysis to evaluate the effects of the natural allelic variant ABCG2 421C>A on the pharmacokinetics of diflomotecan...

..In this study, we used DNA chip technology to systematically identify new prognostic markers for tumor relapse in Dukes' B patients...

..Sensitivity to this combination was associated with poor differentiation status, higher cyclin A index, recruitment of cells into S phase, and induction of Bax expression and apoptosis...

..The aim of this study was to evaluate the functional consequence of known single nucleotide polymorphisms in the transporter genes ABCB1, ABCC2, and ABCG2 on the pharmacokinetic disposition of 9NC and 9AC...

..To retrospectively evaluate the effects of six known allelic variants in the CYP2C8, CYP3A4, CYP3A5, and ABCB1 genes on the pharmacokinetics of the anticancer agent paclitaxel (Taxol)...