OBJECTIVE: To investigate the pathophysiology of perivascular mononuclear cell infiltrates observed in skeletal muscle from patients with systemic lupus erythematosus (SLE). METHODS: Immunocytochemical techniques were used to examine frozen 5 microns sections from the quadriceps needle muscle biopsy specimens of 14 patients with SLE (including seven with infiltrates) for the expression of the cytokine inducible adhesion molecules intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin. RESULTS: Vessels in 6/7 SLE biopsy specimens with perivascular infiltrates expressed VCAM-1 at a density of > 2 vessels/mm2 in contrast with 0/7 SLE biopsy specimens without infiltrates and 1/6 control specimens. In contrast, E-selectin expression was increased ( > 0.3 positive vessels/mm2) in SLE biopsy specimens compared with control tissue regardless of the presence of perivascular infiltration. VCAM-1 and ICAM-1 were also noted on extravascular cells in the infiltrates, being particularly prominent on the intermuscle fibre dendritic processes of CD68+ HLA-DR+ cells. CONCLUSION: Expression of these cytokine inducible adhesion molecules may be important in the migration of mononuclear cells into skeletal muscle and may be involved in intercellular interactions within the tissue.
OBJECTIVE: To investigate the pathophysiology of perivascular mononuclear cell infiltrates observed in skeletal muscle from patients with systemic lupus erythematosus (SLE). METHODS: Immunocytochemical techniques were used to examine frozen 5 microns sections from the quadriceps needle muscle biopsy specimens of 14 patients with SLE (including seven with infiltrates) for the expression of the cytokine inducible adhesion molecules intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin. RESULTS: Vessels in 6/7 SLE biopsy specimens with perivascular infiltrates expressed VCAM-1 at a density of > 2 vessels/mm2 in contrast with 0/7 SLE biopsy specimens without infiltrates and 1/6 control specimens. In contrast, E-selectin expression was increased ( > 0.3 positive vessels/mm2) in SLE biopsy specimens compared with control tissue regardless of the presence of perivascular infiltration. VCAM-1 and ICAM-1 were also noted on extravascular cells in the infiltrates, being particularly prominent on the intermuscle fibre dendritic processes of CD68+ HLA-DR+ cells. CONCLUSION: Expression of these cytokine inducible adhesion molecules may be important in the migration of mononuclear cells into skeletal muscle and may be involved in intercellular interactions within the tissue.
Authors: S M Wellicome; M H Thornhill; C Pitzalis; D S Thomas; J S Lanchbury; G S Panayi; D O Haskard Journal: J Immunol Date: 1990-04-01 Impact factor: 5.422
Authors: Anna Hellquist; Marco Zucchelli; Cecilia M Lindgren; Ulpu Saarialho-Kere; Tiina M Järvinen; Sari Koskenmies; Heikki Julkunen; Päivi Onkamo; Tiina Skoog; Jaana Panelius; Anne Räisänen-Sokolowski; Taina Hasan; Elisabeth Widen; Iva Gunnarson; Elisabet Svenungsson; Leonid Padyukov; Ghazaleh Assadi; Linda Berglind; Ville-Veikko Mäkelä; Katja Kivinen; Andrew Wong; Deborah S Cunningham Graham; Timothy J Vyse; Mauro D'Amato; Juha Kere Journal: PLoS One Date: 2009-12-07 Impact factor: 3.240