Abstract：
BACKGROUND:Leucocyte infiltration and activation in the central nervous system (CNS) is an important step in the pathogenesis of multiple sclerosis (MS). The Chemokine receptor 5 (CCR5) is implicated in immune cell migration and cytokine release in the CNS, and it was demonstrated to strongly contribute to CNS inflammation and damage in several models of sterile and pathogen-mediated CNS diseases. Although the inhibition of CCR5 results in a beneficial effect in experimental models of MS, conflicting results have been found about the loss-of-function variant CCR5Δ32 (rs333) in MS patients. The aim of this study was to evaluate the association of CCR5Δ32 and MS in a Brazilian case/control cohort. PATIENTS AND METHODS:261 MS patients and 435 healthy controls were genotyped for CCR5Δ32. Allelic and genotypic frequencies were compared between patients and controls (case/control analysis), and among patients classified according to the MS clinical form (relapsing remitting versus progressive) and severity (EDSS, MSSS and progression index). RESULTS AND DISCUSSION:The CCR5Δ32 variant frequency was statistically higher in controls as compared to patients presenting European-derived ethnic background. The variant was more frequent in progressive MS as compared to RR-MS patients, and, although not statistically significant, a higher frequency of the truncated allele was observed among patients with less severe forms of MS. These findings emphasize the potential involvement of CCR5 signaling in CNS inflammation and damage in MS. CONCLUSION:The CCR5Δ32 deletion is a protective factor against the development and progression of MS in European-derived Brazilian patients.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Troncoso LL,Pontillo A,Oliveira EML,Finkelszteijn A,Schneider S,Chies JABdoi
10.1016/j.humimm.2018.04.015subject
Has Abstractpub_date
2018-08-01 00:00:00pages
621-626issue
8eissn
0198-8859issn
1879-1166pii
S0198-8859(18)30139-3journal_volume
79pub_type
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