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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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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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Updated: Apr 14, 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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Is there association between TLR9 polymorphism and SLE susceptibility?

Qian Xi1, Yun Liao1, Yongkang Wu1

  • 1Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China.

Molecular Immunology
|April 17, 2015
PubMed
Summary
This summary is machine-generated.

The TLR9 (-1237C/T) gene polymorphism is not linked to systemic lupus erythematosus (SLE) susceptibility. A meta-analysis found no significant correlation in various populations, suggesting it

Keywords:
Genetic polymorphismSNPSystemic lupus erythematosusToll-like receptor 9

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Area of Science:

  • Immunogenetics
  • Rheumatology
  • Population Genetics

Background:

  • Systemic lupus erythematosus (SLE) presents varied genetic risk factors and clinical manifestations between childhood-onset and adult-onset cases.
  • Previous studies suggested potential links between Toll-like receptor (TLR) genes, including TLR9, and SLE susceptibility.
  • The appropriateness of combining diverse patient cohorts (childhood vs. adult-onset) in genetic association studies for SLE is questioned.

Discussion:

  • A meta-analysis was conducted to investigate the association between the TLR9 (-1237C/T) polymorphism and SLE susceptibility.
  • The analysis included total populations, Caucasians, and Asians to assess potential ethnic variations in the genetic link.
  • The study critically evaluated the potential impact of combining distinct SLE onset groups in genetic analyses.

Key Insights:

  • The meta-analysis revealed no statistically significant correlation between the TLR9 (-1237C/T) polymorphism and SLE susceptibility across all analyzed populations (overall, Caucasian, and Asian).
  • Allele model odds ratios (OR) and 95% confidence intervals (CI) did not indicate a risk association for this specific TLR9 variant.
  • These findings challenge the hypothesis that TLR9 (-1237C/T) plays a significant role in SLE pathogenesis.

Outlook:

  • Further research may focus on other TLR gene polymorphisms or different genetic variants within TLR9 in relation to SLE.
  • Investigating the influence of distinct onset types (childhood vs. adult) on genetic associations in SLE warrants separate analyses.
  • Understanding the complex genetic architecture of SLE requires examining multiple genetic factors and their interactions.