RT Journal Article SR Electronic T1 HERV-K and HERV-W transcriptional activity in Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome JF bioRxiv FD Cold Spring Harbor Laboratory SP 693465 DO 10.1101/693465 A1 Rodrigues, Lucas S A1 Nali, Luiz H da Silva A1 Leal, Cibele O D A1 Sabino, Ester C A1 Lacerda, Eliana M A1 Kingdon, Caroline C A1 Nacul, Luis A1 Romano, Camila M YR 2019 UL http://biorxiv.org/content/early/2019/07/05/693465.abstract AB Chronic Fatigue Syndrome / Myalgic Encephalomyelitis (CFS / MS) is an incapacitating chronic disease that dramatically compromise the life quality. The CFS/ME pathogenesis is multifactorial, and it is believed that immunological, metabolic and environmental factors play a role. It is well documented an increased activity of Human endogenous retroviruses (HERVs) from different families in autoimmune and neurological diseases, making these elements good candidates for biomarkers or even triggers for such diseases. Here the expression of Endogenous retroviruses K and W (HERV–K and HERV–W) was determined in blood from moderately and severely affected ME/CFS patients. HERV-K was overexpressed only in moderately affected individuals and HERV-W showed no difference. This is the first report about HERV-K differential expression in moderate ME/CFS.