Multiple sclerosis and HERV-W/MSRV: a multicentric study

We designed a large multicentric study to analyse the presence of MSR V particles in blood and CS F of a
large cohort of patients and controls from different European areas. 149 MS patients and 153 neurological
and healthy controls were selected from Sardinia, Spain, Northern-Italy and Sweden. To avoid biological
and inter-assay variability MSR V was detected within a single laboratory through nested and real-time
PCR assays specific for pol and env genes. MSR V detection in blood and CS F of MS patients and controls in
populations of different ethnicity gave significant differences (p<0.05 compared to neurological controls and
p<0.001 compared to healthy controls). The presence and viral load of MSRV are significantly associated with
MS as compared to neurological and healthy controls in all ethnic groups.