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Related Concept Videos

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.
Cystic Fibrosis: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
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Pedigree Analysis

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Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

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...
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.
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The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...

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Related Experiment Video

Updated: Jul 14, 2026

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification
10:21

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification

Published on: September 20, 2024

Genetics of sarcoidosis.

Paolo Spagnolo1, Roland M du Bois

  • 1Interstitial Lung Disease Unit, Department of Occupational and Environmental Medicine, National Heart and Lung Institute, Imperial College of Science, Technology, and Medicine, London, United Kingdom. p.spagnolo@imperial.ac.uk

Clinics in Dermatology
|June 15, 2007
PubMed
Summary

Genetic factors influence sarcoidosis susceptibility and clinical presentation. While human leukocyte antigen (HLA) associations are established, further research into genes like butyrophilin-like 2 (BTNL2) and diverse populations is crucial for understanding this complex disease.

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Last Updated: Jul 14, 2026

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification
10:21

Primary Sjogren's Syndrome Associated with Lung Adenocarcinoma: Probing the Potential Common Pathogenic Mechanisms and Experimental Verification

Published on: September 20, 2024

Area of Science:

  • Genetics
  • Immunology
  • Pulmonology

Background:

  • Sarcoidosis predisposition and clinical variability are strongly influenced by genetic factors.
  • Numerous genetic loci have been studied, but only a few human leukocyte antigen (HLA) alleles show consistent associations with sarcoidosis.
  • The HLA-DRB1*0301/DQB1*0201 haplotype is notably linked to Löfgren's syndrome.

Purpose of the Study:

  • To review current understanding of genetic associations in sarcoidosis.
  • To highlight promising genetic candidates beyond HLA, such as chemokine receptors and butyrophilin-like 2 (BTNL2).
  • To emphasize the need for validation in diverse ethnic populations and refined clinical phenotyping for complex genetic studies.

Main Methods:

  • Review of case-control association studies investigating genetic loci in sarcoidosis.
  • Analysis of established and potential genetic associations, including HLA alleles and other candidate genes.
  • Discussion of limitations in current genetic research, such as incomplete biological relevance understanding and ethnic diversity.

Main Results:

  • Consistent associations found for specific human leukocyte antigen (HLA) alleles, particularly the HLA-DRB1*0301/DQB1*0201 haplotype with Löfgren's syndrome.
  • Emerging evidence suggests associations with chemokine receptors and butyrophilin-like 2 (BTNL2) warrant further investigation.
  • Significant limitations include the need for deeper understanding of gene function and validation across different ethnic groups.

Conclusions:

  • Genetics plays a critical role in sarcoidosis, influencing both susceptibility and disease course.
  • While HLA associations are significant, exploring other genes like BTNL2 is essential for unraveling sarcoidosis pathogenesis.
  • Future research must incorporate functional studies, diverse populations, and precise clinical phenotyping to advance understanding of this heterogeneous disorder.