title: Response of peripheral lymphocytes from patients with ossification of posterior longitudinal ligament.
abstract: The in vitro response of peripheral blood mononuclear cells or enriched CD4+ T cells from patients with ossification of the posterior longitudinal ligament to anti-CD3 monoclonal antibody has been studied. The response in both was significantly lower in patients with the continuous-type ossification than in patients with the segmental-type ossification and in healthy volunteers, and was inversely correlated with the number of vertebral bodies with ossified ligament. In patients with the segmental-type ossification, the response of peripheral blood mononuclear cells was significantly lower than that in healthy volunteers, but that of the enriched T cells was not. B cell proliferation in response to fixed Staphylococcus aureus cells was significantly lower in patients with the continuous-type ossification than in healthy volunteers but was not correlated with the number of vertebral bodies with ossified ligament. The B cell response in patients with the segmental-type ossification was not lower than that in healthy volunteers. Serum concentrations of transforming growth factor-beta1 and basic fibroblast growth factor also were higher in patients with the continuous-type ossification than in patients with the segmental-type ossification and in healthy volunteers. The findings raise the possibility that continuous-type ossification of posterior longitudinal ligament might develop differently from segmental-type ossification.
authors.affiliation: Department of Orthopedics, Toho University School of Medicine, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kanai
authors.forename: T
authors.initials: T
authors.lastname: Kakiuchi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001402:B-Lymphocytes / Q000276:immunology*; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017887:Ossification of Posterior Longitudinal Ligament / Q000097:blood / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*