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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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CCR5-Delta32: implications in SLE development.

C Carvalho1, S L Calvisi, B Leal

  • 1UMIB, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS) UPorto, Porto, Portugal.

International Journal of Immunogenetics
|October 30, 2013
PubMed
Summary
This summary is machine-generated.

The CCR5∆32 gene variant appears to protect against systemic lupus erythematosus (SLE), a complex autoimmune disease. Lower frequencies of this variant were found in SLE patients, suggesting a potential therapeutic target.

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Area of Science:

  • Immunology
  • Genetics
  • Rheumatology

Background:

  • Systemic lupus erythematosus (SLE) is an autoimmune disease influenced by genetic and environmental factors.
  • Elevated chemokine levels are observed in active SLE.
  • C-C chemokine receptor type 5 (CCR5) plays a role in inflammatory cell recruitment.

Purpose of the Study:

  • To investigate the association between the CCR5∆32 polymorphism and SLE in a Portuguese cohort.
  • To determine if CCR5∆32 allele frequency differs between SLE patients and healthy controls.

Main Methods:

  • Case-control study design.
  • Genotyping of the CCR5∆32 polymorphism in 219 SLE patients and 205 healthy controls.
  • Statistical analysis to compare allele frequencies and assess association (Odds Ratio, P-value).

Main Results:

  • The frequency of CCR5/∆32 heterozygotes was significantly lower in SLE patients (8%) compared to controls (15%).
  • An odds ratio of 0.5162 (P = 0.0319) indicated a protective association.
  • This suggests the CCR5∆32 allele may confer resistance to SLE development.

Conclusions:

  • The CCR5∆32 allele demonstrates a protective association with systemic lupus erythematosus.
  • These findings underscore the potential role of CCR5-expressing Th1 cells in SLE pathogenesis.
  • Further research into CCR5 modulation could offer therapeutic insights for SLE.