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相关概念视频

Pharmacogenetics and Pharmacogenomics: Overview01:29

Pharmacogenetics and Pharmacogenomics: Overview

Pharmacogenetics and pharmacogenomics examine how genetic factors influence an individual's response to drugs. While pharmacogenetics focuses on the impact of specific genetic variants on drug effects, pharmacogenomics takes a broader approach, studying how genetic variation across populations contributes to differences in drug responses. These fields aim to explain why individuals may experience varying levels of efficacy or adverse reactions to the same medication.Variability in drug...
Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
Pharmacogenetics of Drug Metabolism: Overview01:27

Pharmacogenetics of Drug Metabolism: Overview

Genetic polymorphism in drug metabolism is crucial to the inter-individual variability observed in drug responses. Drug metabolism primarily involves the chemical modification of drugs and other xenobiotics to enhance their elimination by increasing their polarity. Two main classes of enzymes mediate this biotransformation process: Phase I enzymes, primarily cytochrome P450s, catalyze oxidation and reduction reactions, while other enzymes, such as esterases, mediate hydrolysis, and Phase II...
Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes01:28

Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes

Cytochrome P450 (CYP450) enzymes are a superfamily of heme-containing monooxygenases that play a pivotal role in Phase I drug metabolism by catalyzing oxidation and reduction reactions.These enzymes transform lipophilic xenobiotics into more hydrophilic metabolites, facilitating subsequent Phase II conjugation and eventual excretion. The CYP450 family is classified into families (e.g., CYP1–CYP3) and subfamilies (e.g., CYP2A, CYP2C), based on amino acid sequence homology.CYP450 isoenzymes,...
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...

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相关实验视频

Updated: Jun 6, 2026

Pyrosequencing: A Simple Method for Accurate Genotyping
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星相:用于长时间读取测序数据的综合相位感知药物基因组二分类型.

James M Holt1, John Harting1, Xiao Chen1

  • 1PacBio, 1305 O'Brien Drive, Menlo Park, CA 94025, USA.

bioRxiv : the preprint server for biology
|December 23, 2024
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概括
此摘要是机器生成的。

StarPhase工具使用长读序列测序来准确地对21个基因进行药基因组学双型化. 这通过改善药物安全性和疗效预测,推进了精准医学.

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相关实验视频

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科学领域:

  • 基因组学就是基因组学.
  • 药物基因组学 药物基因组学
  • 精准医学是一门精准的医学.

背景情况:

  • 药物基因组学对于个性化医学至关重要,指导药物的安全性和有效性.
  • 准确的药物基因组双型化需要全长的DNA序列和结构变异的检测.

研究的目的:

  • 介绍StarPhase,这是一个用于全面的药物基因组双型化的一个新工具.
  • 利用PacBio HiFi长读序列数据来提高准确度.

主要方法:

  • 利用PacBio HiFi测序数据进行双型化 21个临床药物遗传实施联盟 (CPIC) A级药物基因.
  • 为特定的基因开发了详细的单元型分析和可视化,包括HLA-A,HLA-B和CYP2D6.

主要成果:

  • 与基准二类型实现了高一致性 (99.5%),手动审查证实了StarPhase的准确性.
  • 更新或纠正了来自Germline Genotyping参考材料 (GeT-RM) 数据库的现有药物基因组双型的26.2%.
  • 确定了当前药物基因组数据库中的差距,突出了长读测序的潜力.

结论:

  • StarPhase使用单个全基因组测序试验提供了强大的药物基因组双型鉴定.
  • 这种工具支持发现新的药物基因和单元型,推进精准医学.
  • 能够更准确地预测药物反应和药物不良反应.