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Related Concept Videos

Human Genetics01:28

Human Genetics

Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
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...
Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
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...

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Genetics and sudden death.

Raffaella Lombardi1

  • 1Center for Cardiovascular Genetics, Institute of Molecular Medicine, University of Texas Health Sciences Center at Houston, Texas Heart Institute at St Luke’s Episcopal Hospital, Houston, Texas 77030, USA. Raffaella.Lombardi@uth.tmc.edu

Current Opinion in Cardiology
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PubMed
Summary
This summary is machine-generated.

Sudden cardiac death (SCD) in young individuals is often caused by genetic heart disorders. Recent advancements in genetic sequencing and testing offer powerful tools for diagnosing and managing these hereditary conditions.

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Area of Science:

  • Cardiology
  • Genetics
  • Molecular Biology

Background:

  • Sudden cardiac death (SCD) significantly impacts young individuals.
  • Genetic heart disorders, including cardiomyopathies and channelopathies, are primary causes of SCD.
  • Understanding the genetic and molecular basis of hereditary cardiac diseases is crucial.

Purpose of the Study:

  • To review recent advancements in the genetic and molecular understanding of hereditary cardiac diseases.
  • To highlight progress in identifying genes linked to arrhythmogenic syndromes.
  • To discuss the implications of these findings for clinical practice.

Main Methods:

  • Review of recent scientific literature on genetic heart diseases.
  • Analysis of advancements in gene identification and DNA sequencing technologies.
  • Discussion of the role of genetic testing panels.

Main Results:

  • Significant progress in identifying new genes associated with monogenic familial arrhythmogenic syndromes.
  • Elucidation of molecular pathogenesis and potential therapeutic targets.
  • Increased availability of genetic testing panels due to falling DNA sequencing costs.

Conclusions:

  • Genetic sequencing technology is poised to transform clinical practice.
  • Genetic testing is a valuable tool for diagnosing arrhythmogenic cardiac diseases, screening family members, risk stratification, and guiding treatment.
  • Expertise is essential for ordering and interpreting genetic screening results.