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Related Concept Videos

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...
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...
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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Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
Complementation Tests00:49

Complementation Tests

A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...

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Updated: May 29, 2026

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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Complement polymorphisms: geographical distribution and relevance to disease.

L Ermini1, I J Wilson, T H J Goodship

  • 1Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK.

Immunobiology
|September 9, 2011
PubMed
Summary
This summary is machine-generated.

Human genetic diversity is shaped by pathogen interactions, influencing immune system evolution. Complement gene variations show geographical patterns, offering insights into host-pathogen dynamics and human evolution.

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Area of Science:

  • Human evolutionary biology
  • Immunogenetics
  • Population genetics

Background:

  • Human evolution involved migration and infectious diseases, shaping genetic diversity.
  • The complement system is vital for early immune response against pathogens.
  • Pathogen evolution has driven the complexity of the human complement system.

Purpose of the Study:

  • To describe geographical variation in human complement genes.
  • To explore the role of host-pathogen interactions in shaping complement gene evolution.
  • To provide insights into human immune system evolution.

Main Methods:

  • Analysis of geographical variation in complement genes.
  • Examination of polymorphisms in complement genes, such as Factor H and Factor B.
  • Comparison of allele frequencies across different human populations.

Main Results:

  • Significant geographical variation exists in complement gene polymorphisms.
  • Specific polymorphisms, like Ile62Val in Factor H, show marked geographical distribution.
  • These variations correlate with human-pathogen interactions and geographical origin.

Conclusions:

  • Geographical patterns in complement genes reflect evolutionary adaptations to pathogens.
  • Analysis of complement gene variation is a valuable tool for understanding host-pathogen interactions.
  • Complement gene variation offers insights into the evolution of the human immune system.