Selective in vivo removal of rheumatoid factor by an extracorporeal treatment device in rheumatoid arthritis patients.

A prospective phase II trial was conducted to assess the feasibility, tolerance, and efficacy of a device designed for selective removal of rheumatoid factor from the plasma of rheumatoid arthritis patients. The device contained terpolymer hydrogel-coated plates with chemically attached, aggregated human immunoglobulin G, and it operated as an immunoaffinity column. Sixty-one patients aged 25 to 73 underwent weekly plasmapheresis treatments (the primary therapy phase). During the trial, patients continued current rheumatoid arthritis medications without dose adjustments. All patients received two to six treatments (primary therapy). Responding patients were eligible to continue apheresis treatment every 2 to 6 weeks (maintenance therapy). No serious, untoward side effects were noted in the course of this study; of 640 treatments, only 2 (in different patients) were aborted, one because of complaints of dizziness and angioedema and the other because of chest tightness and shortness of breath. Except for a significant (p less than 0.05) decrease in serum iron, no significant changes in complete blood count, serum electrolytes, renal and hepatic function tests, or serum C3 and C4 were noted. Although the trial was not designed to determine clinical efficacy, patients noted less morning stiffness, longer time to onset of fatigue, and improved global pain assessment (p less than 0.004); significant objective improvements were noted in joint pain, tenderness, swelling, and the number of affected joints (p less than 0.001). One-half of the treated patients had at least a 50 percent improvement in objective measures of antirheumatic activity.(ABSTRACT TRUNCATED AT 250 WORDS)

Evaluation of pulmonary hypertrophic osteoarthropathy in cystic fibrosis. A comprehensive study.

A questionnaire survey of 375 patients with cystic fibrosis was performed to seek evidence of pulmonary hypertrophic osteoarthropathy (PHOA). Three hundred responses were obtained. Forty-five patients (15%) who described long-bone or joint pain met clinical criteria for the diagnosis of PHOA, 25 of whom had roentgenographic evidence of periostitis. Compared with an age- and sex-matched control group (group 3), the patients with cystic fibrosis and PHOA as well as roentgenographic evidence of periostitis (group 1) had worse Shwachman scores and pulmonary function and a significantly increased mortality rate (36%). The patients with PHOA but no roentgenographic evidence of periostitis (group 2) had Shwachman scores intermediate between groups 1 and 3. We believe PHOA is more common than previously suspected. Its incidence appears related to severity of disease.

Terminal complement component deficiencies and rheumatic disease: development of a rheumatic syndrome and anticomplementary activity in a patient with complete C6 deficiency.

Hereditary deficiencies of early complement components have usually been associated with the development of rheumatic diseases like systemic lupus erythematosus (SLE), while terminal component deficiency is well known to predispose to recurrent neisserial infection. In contrast, only recently have patients been reported with rheumatic disease and hereditary deficiency of a terminal component. The clinical syndrome in these patients has been characterised as 'SLE-like'. We describe here a third patient with complete C6 deficiency and a systemic rheumatic illness characterised by fever, anaemia, lymphadenopathy, hepatosplenomegaly, episcleritis, and asymmetric arthritis. After blood transfusion her serum became anticomplementary; IgG antibody to human C6 was found to be the cause of anticomplement activity. Persistent absence of C6 in this patient and production of anti-C6 antibody after antigenic challenge indicate hereditary C6 deficiency. This case supports an association between hereditary deficiency of a terminal complement protein and the development of systemic rheumatic disease.