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Increase in CCR5 Delta32/Delta32 genotype in multiple sclerosis.
Acta Neurol Scand. 2004 May; 109(5):342-7.AN

Abstract

Chemokines and their receptors participate in the development of multiple sclerosis (MS) by guiding immune cells into the brain tissue. A CCR5 Delta32 deletion mutation abolishes functional CCR5 on the cell surface and may reduce cell entry into the lesion sites. To analyse the significance of this mutation in MS, we compared the frequencies of CCR5 genotype in peripheral blood mononuclear cells from 89 MS patients and 119 healthy controls. The CCR5 genotype was further compared with the CCR5 RNA and surface protein expression in 48 MS patients and their controls. In all MS patients, the Delta32/32 genotype was found with 6.7% frequency, whereas it was present only in 0.8% of the controls (6/89 vs 1/119, P = 0.01). Specifically, the Delta32/Delta32 genotype was increased (11.5%, P = 0.05) among primary progressive MS patients, whereas it was present only in 4.8% in other MS subtypes and only in 0.8% of the controls. The amount of CCR5 protein on CD4(+) cells analysed in 48 MS patients (nine primary progressive MS, 18 secondary progressive MS, 21 relapsing-remitting MS) and 13 controls decreased with genotype, being 8.9% in wt/wt, 7.7% in wt/Delta32 and 4.3% in Delta32/Delta32. CCR5 surface expression analysed on these 48 MS patients and 13 controls was significantly decreased in Delta32/Delta32 MS patients as compared with that in wt/wt genotype individuals (P = 0.004). The significantly increased number of Delta32/Delta32 individuals among our MS patients suggests that this genotype could contribute as a general risk factor for MS. However, neither the levels of RNA or surface protein correlated with MS subtype, neurological disability as expressed by expanded disability status scale, or disease progression index. Our results suggest that the lack of CCR5 does not protect from MS, but rather it may predispose to the chronic course of the disease. This would further imply that in view of the redundancy in the chemokine system, CCR5 ligands must be assumed to function through other closely related chemokine receptors.

Authors+Show Affiliations

Research Unit of Tampere University Hospital, Tampere, Finland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15080861

Citation

Pulkkinen, K, et al. "Increase in CCR5 Delta32/Delta32 Genotype in Multiple Sclerosis." Acta Neurologica Scandinavica, vol. 109, no. 5, 2004, pp. 342-7.
Pulkkinen K, Luomala M, Kuusisto H, et al. Increase in CCR5 Delta32/Delta32 genotype in multiple sclerosis. Acta Neurol Scand. 2004;109(5):342-7.
Pulkkinen, K., Luomala, M., Kuusisto, H., Lehtimäki, T., Saarela, M., Jalonen, T. O., & Elovaara, I. (2004). Increase in CCR5 Delta32/Delta32 genotype in multiple sclerosis. Acta Neurologica Scandinavica, 109(5), 342-7.
Pulkkinen K, et al. Increase in CCR5 Delta32/Delta32 Genotype in Multiple Sclerosis. Acta Neurol Scand. 2004;109(5):342-7. PubMed PMID: 15080861.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Increase in CCR5 Delta32/Delta32 genotype in multiple sclerosis. AU - Pulkkinen,K, AU - Luomala,M, AU - Kuusisto,H, AU - Lehtimäki,T, AU - Saarela,M, AU - Jalonen,T O, AU - Elovaara,I, PY - 2004/4/15/pubmed PY - 2004/8/3/medline PY - 2004/4/15/entrez SP - 342 EP - 7 JF - Acta neurologica Scandinavica JO - Acta Neurol. Scand. VL - 109 IS - 5 N2 - Chemokines and their receptors participate in the development of multiple sclerosis (MS) by guiding immune cells into the brain tissue. A CCR5 Delta32 deletion mutation abolishes functional CCR5 on the cell surface and may reduce cell entry into the lesion sites. To analyse the significance of this mutation in MS, we compared the frequencies of CCR5 genotype in peripheral blood mononuclear cells from 89 MS patients and 119 healthy controls. The CCR5 genotype was further compared with the CCR5 RNA and surface protein expression in 48 MS patients and their controls. In all MS patients, the Delta32/32 genotype was found with 6.7% frequency, whereas it was present only in 0.8% of the controls (6/89 vs 1/119, P = 0.01). Specifically, the Delta32/Delta32 genotype was increased (11.5%, P = 0.05) among primary progressive MS patients, whereas it was present only in 4.8% in other MS subtypes and only in 0.8% of the controls. The amount of CCR5 protein on CD4(+) cells analysed in 48 MS patients (nine primary progressive MS, 18 secondary progressive MS, 21 relapsing-remitting MS) and 13 controls decreased with genotype, being 8.9% in wt/wt, 7.7% in wt/Delta32 and 4.3% in Delta32/Delta32. CCR5 surface expression analysed on these 48 MS patients and 13 controls was significantly decreased in Delta32/Delta32 MS patients as compared with that in wt/wt genotype individuals (P = 0.004). The significantly increased number of Delta32/Delta32 individuals among our MS patients suggests that this genotype could contribute as a general risk factor for MS. However, neither the levels of RNA or surface protein correlated with MS subtype, neurological disability as expressed by expanded disability status scale, or disease progression index. Our results suggest that the lack of CCR5 does not protect from MS, but rather it may predispose to the chronic course of the disease. This would further imply that in view of the redundancy in the chemokine system, CCR5 ligands must be assumed to function through other closely related chemokine receptors. SN - 0001-6314 UR - https://www.unboundmedicine.com/medline/citation/15080861/Increase_in_CCR5_Delta32/Delta32_genotype_in_multiple_sclerosis_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0001-6314&date=2004&volume=109&issue=5&spage=342 DB - PRIME DP - Unbound Medicine ER -