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Related Concept Videos

Polygenic Traits01:18

Polygenic Traits

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When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
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Heritability01:06

Heritability

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Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
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COPD: Pathogenesis and Clinical Features01:20

COPD: Pathogenesis and Clinical Features

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Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
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Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

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Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
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X-linked Traits01:19

X-linked Traits

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In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
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Pleiotropy01:33

Pleiotropy

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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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Updated: Aug 8, 2025

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Identifying COPD subtypes using multi-trait genetics.

Andrey Ziyatdinov1,2, Brian D Hobbs2,3, Samir Kanaan-Izquierdo4,5,6

  • 1Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.

Medrxiv : the Preprint Server for Health Sciences
|March 3, 2023
PubMed
Summary
This summary is machine-generated.

Genetic variants influence Chronic Obstructive Pulmonary Disease (COPD) phenotypes. Our study identified distinct genetic clusters associated with varied health traits, revealing genetically driven patterns in COPD.

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Area of Science:

  • Pulmonary Medicine
  • Genetics
  • Bioinformatics

Background:

  • Chronic Obstructive Pulmonary Disease (COPD) exhibits significant clinical heterogeneity despite a clear physiological diagnosis.
  • The genetic underpinnings of COPD phenotypic variability remain largely unexplored.

Approach:

  • Genome-wide association study (GWAS) data from UK Biobank was analyzed to link lung function, COPD, and asthma genetic variants with diverse phenotypes.
  • Clustering analysis identified three distinct groups of genetic variants impacting traits like white blood cell count, height, and body mass index (BMI).
  • Cluster-specific genetic risk scores were evaluated in the COPDGene cohort to assess clinical and molecular associations.

Key Points:

  • Three clusters of genetic variants showed differential associations with non-respiratory phenotypes, including BMI and blood cell counts.
  • Genetic risk scores derived from these clusters correlated with variations in steroid use, BMI, lymphocyte counts, and chronic bronchitis.
  • Significant differences in gene and protein expression were observed across the genetic risk score groups.

Conclusions:

  • Genetic variants associated with obstructive lung diseases contribute to phenotypic diversity in COPD.
  • Multi-phenotype analysis of genetic risk variants can uncover genetically driven patterns within COPD.
  • This approach offers insights into the biological mechanisms underlying COPD heterogeneity.