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Related Concept Videos

Genetic Screens02:46

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
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...
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...

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gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair
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Molecular genetic risk screening.

Wayne W Grody1

  • 1Department of Pathology, UCLA School of Medicine, Los Angeles, California 90095-1732, USA. wgrody@mednet.ucla.edu

Annual Review of Medicine
|January 15, 2003
PubMed
Summary
This summary is machine-generated.

Population genetic screening identifies disease-associated gene mutations for early risk prediction and intervention. Challenges include mutation complexity, incomplete penetrance, and ethical considerations for widespread genetic testing.

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Area of Science:

  • Genetics
  • Public Health
  • Molecular Biology

Background:

  • The Human Genome Project accelerates the discovery of disease-associated genes.
  • High prevalence of certain gene mutations in populations supports screening initiatives.
  • Molecular genetic testing offers predictive capabilities for future diseases.

Purpose of the Study:

  • To review criteria for population genetic risk screening.
  • To examine diverse disease-screening examples.
  • To discuss challenges in implementing genetic screening programs.

Main Methods:

  • Review of criteria for population genetic risk screening.
  • Analysis of case studies for various genetic diseases.
  • Discussion of technical and ethical challenges.

Main Results:

  • Genetic screening can predict disease risk and guide interventions.
  • Examples include cystic fibrosis, hereditary hemochromatosis, and cancer predispositions.
  • Implementation is hindered by mutation complexity, penetrance, and ethical issues.

Conclusions:

  • Population genetic screening holds promise for early disease prediction and prevention.
  • Careful consideration of genetic, technical, and ethical factors is crucial.
  • Further research and policy development are needed for effective implementation.