Antiendothelial cell antibodies (AECA) have been detected in the sera of patients of autoimmune diseases showing vasculitis. Using IgM-ELISA, we found AECA in 42 (56%) of 75 sera samples from patients with Behcet's disease in a previous study. All of the 15 AECA-positive sera of Behcet's disease patients had an increased expression of the intercellular cell adhesion molecule-1 (ICAM-1), 93.3% of the sera induced the vascular cell adhesion molecule-1 (VCAM-1), and 100% of the serum induced the E-selectin molecule on human dermal microvascular endothelial cells (HDMEC). After stimulation of HDMEC with AECA-positive sera of Behcet's disease patients, the expression of ICAM-1 and VCAM-1 on HDMEC increased significantly at 4 hours, reaching a peak at 16 hours. Expression of E-selectin was induced at 1 hour after stimulation with a peak at 4 hours and it decreased thereafter. Adherence of T lymphocytes to HDMEC increased significantly after stimulation with AECA-positive sera from Behcet's disease patients. Also, the adherence of T lymphocytes to HDMEC increased at 4 hours and returned to its normal level at 48 hours. These results show that AECA-positive sera of Behcet's disease patients are capable of activating HDMEC to promote the adherence of T lymphocytes to increase the expression of ICAM-1, VCAM-1, and E-selectin on the cell surfaces. The whole process may play an important role in the pathogenesis of vasculitis in Behcet's disease.
Antibodies/physiology* ; Antibodies/blood ; Behcet's Syndrome/immunology ; Behcet's Syndrome/blood* ; Blood Physiology ; Cell Adhesion/physiology ; Cells, Cultured ; Endothelium, Vascular/physiology* ; Endothelium, Vascular/immunology* ; Endothelium, Vascular/cytology ; Human ; Microcirculation/physiology ; Skin/blood supply* ; T-Lymphocytes/physiology*

PURPOSE: We aimed to determine the prevalence of anti-cyclic citrullinated peptide (anti-CCP) antibodies in a large group of Korean patients with Behcet's disease (BD), with and without joint involvement, and to compare these findings with the prevalences of anti-CCP antibodies in patients with rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE). MATERIALS AND METHODS: We tested 189 patients with BD, 105 with RA, and 36 with SLE for anti-CCP antibodies and IgM rheumatoid factor in serum. We reviewed the medical records of patients with BD to investigate their personal and clinical characteristics as well as their laboratory test results. RESULTS: Anti-CCP antibodies were detected in seven of the 189 BD patients (3.7%), at a mean titer of 30.6+/-44.4 U/mL, in 86 of the 105 RA patients (81.9%) with a mean titer of 198.8+/-205.7 U/mL, and in nine of the 36 SLE patients (25%) with a mean titer of 180.4+/-113.9 U/mL. One of the seven anti-CCP-positive BD patients fulfilled the diagnostic criteria for both BD and RA. Five of the seven anti-CCP-positive BD patients (71.4%) had polyarticular joint involvement, and the other two patients (28.6%) had oligoarticular involvement. CONCLUSION: We determined the prevalence of anti-CCP antibodies in a large group of Korean BD patients with and without joint involvement. Negative anti-CCP test in patients with BD may help to differentiate BD from RA and SLE, all of which present with similar clinical features.
Adolescent ; Adult ; Aged ; Antibodies/*blood ; Arthritis, Rheumatoid/blood/immunology ; Behcet Syndrome/*blood/immunology ; Child ; Female ; Humans ; Lupus Erythematosus, Systemic/blood/immunology ; Male ; Middle Aged ; Peptides, Cyclic/*immunology ; Young Adult

Behcet's disease (BD) is a multisystemic chronic inflammatory disease. It is characterized by recurrent oral and genital ulcers, uveitis, skin lesions and other manifestations, including neurologic, vascular, joint, and gastrointestinal ulcers of variable severity. Recurrent aphthous ulcer (RAU) represents a very common, but poorly understood, mucosal disorder. If a patient of RAU without any other typical symptoms of BD has gastrointestinal symptoms, it is difficult to distinguish this RAU from true BD with gastrointestinal involvement. Because pathognomonic clinical features and tools are absent, the differential diagnosis of these two diseases relies on the characteristic clinical features and the judgement of an experienced physician. Sixty-five out of a total 960 RAU patients and forty-four of 556 BD patients with gastrointestinal symptoms between January 1996 and December 2003 participated in this study. All were evaluated with esophagogastroduodenoscopy and colonoscopy. Clinical, endoscopic and histopathologic findings were analyzed and ELISA tests were conducted to detect serum levels of ASCA and pANCA. No significant difference was found between the two groups. Differential diagnosis between RAU with gastrointestinal symptoms and BD with gastrointestinal involvement requires further prospective, large-scale study.
Adolescent ; Adult ; Aged ; Antibodies, Antineutrophil Cytoplasmic/blood ; Antibodies, Fungal/blood ; Behcet Syndrome/*diagnosis/immunology/pathology ; Comparative Study ; Diagnosis, Differential ; Endoscopy ; Female ; Gastrointestinal Diseases/*diagnosis/immunology/pathology ; Humans ; Male ; Middle Aged ; Saccharomyces cerevisiae/immunology ; Serologic Tests ; Stomatitis, Aphthous/*diagnosis/immunology/pathology

Rheumatoid arthritis (RA) is a multifactorial autoimmune disease whose etiopathogenesis is not well understood. Although soluble (s) forms of 4-1BB (s4-1BB) and 4-1BB legand (s4-1BBL) have been detected in the sera of RA patients, their significance is not known. We compared the serum levels of s4-1BB and s4-1BBL in RA patients with those in systemic lupus erythematosus (SLE) and Behcet's disease (BD) patients. Serum levels of s4-1BB and s4-1BBL were significantly higher in RA patients compared with healthy controls, SLE or BD patients, and the abundance was correlated with disease severity in patients with RA. The serum levels of s4-1BB in RA patients were inversely corroborated with 4-1BB expression levels on activated T lymphocytes. In addition, there was a correlation between serum levels of s4-1BB and s4-1BBL. The augmented secretion of s4-1BB and s4-1BBL levels into the serum may reflect the clinical symptoms of RA and levels of s4-1BB and s4-1BBL in sera at the time of diagnosis may be indicative of the severity and outcome of RA.
Adult ; Aged ; Antigens, CD/metabolism ; Arthritis, Rheumatoid/*blood/drug therapy/immunology/*pathology ; Behcet Syndrome/blood/immunology ; Comparative Study ; Female ; Humans ; Immunosuppressive Agents/metabolism/therapeutic use ; Leukocytes, Mononuclear/metabolism ; Lupus Erythematosus, Systemic/blood/immunology ; Male ; Middle Aged ; Random Allocation ; Receptors, Nerve Growth Factor/*blood ; Receptors, Tumor Necrosis Factor/*blood ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S. ; Severity of Illness Index ; Statistics ; Tumor Necrosis Factor-alpha/*metabolism