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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...
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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...
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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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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.
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Updated: Feb 17, 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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Association of complement receptor 1 gene polymorphisms with cognitive function.

L E Zijlstra1, J W Jukema1, S P Mooijaart2

  • 1Department of Cardiology, Leiden University Medical Center , Leiden , The Netherlands.

Physiological Genomics
|December 8, 2017
PubMed
Summary
This summary is machine-generated.

Genetic variations in the complement receptor 1 (CR1) gene are linked to cognitive decline in older adults. This research highlights CR1

Keywords:
Alzheimer’s diseasechromosome 1cognitive functioncomplement receptor 1older patients

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Area of Science:

  • Genetics
  • Neuroscience
  • Gerontology

Background:

  • The complement receptor 1 (CR1) gene has been implicated in the development of Alzheimer's disease.
  • Understanding the role of CR1 in cognitive function is crucial for addressing age-related cognitive decline.

Purpose of the Study:

  • To investigate the association between CR1 gene single nucleotide polymorphisms (SNPs) and cognitive function in an elderly population.
  • To determine if CR1 genetic variations impact general cognitive function beyond Alzheimer's disease.

Main Methods:

  • Assessed 73 single nucleotide polymorphisms (SNPs) within the CR1 gene region on chromosome 1 in 5,244 elderly participants.
  • Utilized linear regression analysis, adjusting for age, sex, country, and pravastatin use, to examine SNP-cognitive function associations.
  • Identified 18 independent CR1 SNPs based on linkage disequilibrium.

Main Results:

  • Twelve of the 18 independent CR1 SNPs were significantly associated with a decline in cognitive function (P < 0.05).
  • These findings suggest a broader role for CR1 in cognitive health during late life.

Conclusions:

  • Genetic variations within the CR1 gene are associated with general cognitive function in older individuals.
  • The CR1 gene may serve as a potential target for understanding and mitigating cognitive decline in aging populations.