Abstract
Research into the pathogenesis of multiple sclerosis (MS) has focused on myelin antigens as potential targets of autoimmune attack. Proteolipid protein (PLP) is the most abundant myelin protein comprising more than 50% of central nervous system myelin. Although PLP is a hydrophobic membrane protein which has made it difficult to study, the use of synthetic peptides based on the PLP sequence provides an alternative method for studying the immunological properties of PLP. Using peripheral blood lymphocytes from MS patients, long-term TCL established in the presence of PLP reacted weakly to PLP in proliferation assays; however, these same lines were much more reactive to synthetic peptides of PLP. Thus, we established short-term T cell lines (TCL) from the peripheral blood lymphocytes (PBL) of MS patients in the presence of five separate synthetic PLP peptides. In 6/7 MS patients, proliferative responses were elicited most often to PLP 40-60 compared to four other PLP peptides (PLP 89-106, 103-120, 125-143, and 139-154) (Pelfrey et al., 1993). Interestingly, however, the magnitude of the proliferative response was greatest in response to PLP 89-106. Characterization of PLP 89-106-responsive TCL from several MS patients, indicated ...Continue Reading
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