Search for: rheumatoid arthritis methotrexate autoimmune disease biomarker gene expression GWAS HLA genes non-HLA genes
| ID | PMID | Title | PublicationDate | abstract |
|---|---|---|---|---|
| 3685907 | Rheumatoid factor isotypes and renal disease in systemic lupus erythematosus. | 1987 | There is no agreement on whether rheumatoid factor (RF) exerts protection, injury, or is an epiphenomenon with regard to kidney disease in systemic lupus erythematosus (SLE). In this study we examined the occurrence and isotype distribution of rheumatoid factor in SLE in relation to some clinical parameters, including renal function and arthritis. A highly significant correlation (p less than 0.001) was noted between the presence of IgG RF and absence of kidney disease. The IgG RF also seemed to protect SLE patients from developing arthritis (p less than 0.01). On the other hand, elevated IgM RF levels indicated active SLE disease. The results obtained are discussed in relation to the ability of RF to interact with immune complexes in vitro and in vivo. | |
| 3175453 | Complement-activating properties of immune complexes are suppressed by IgM rheumatoid fact | 1988 | The effect of rheumatoid factor (RF) on complement-activating capacity of aggregated IgG was investigated. The degree of complement activation induced by the addition of specific amounts of aggregated IgG to patients' sera and normal sera was demonstrated by the inhibition of hemolytic activity (%IHA). The %IHA was significantly lower in rheumatoid arthritis (RA) sera and higher in systemic lupus erythematosus (SLE) sera, compared with normal sera. There was a negative correlation between %IHA and IgMRF/IgGRF ratio in RA and SLE sera, and RA synovial fluid. The %IHA and IgGRF were positively correlated in RA sera. The IgMRF/IgGRF ratio was significantly lower in SLE sera than in RA sera and systemic sclerosis sera, and was significantly lower in RA synovial fluid than in osteoarthritis synovial fluid. Isolated RF, consisting of mostly IgMRF class, inhibited complement-activating properties of aggregated IgG, depending on the concentration of RF. Isolated RF was further purified by the fractionation using high pressure liquid chromatography, and IgGRF and IgMRF were obtained. IgMRF significantly suppressed the complement-activating capacity of aggregated IgG, whereas IgGRF promoted it. These observations suggest that IgMRF acts protectively, while IgGRF induces inflammation. Thus, the expression of the biological activity of RF with special reference to immune complex interaction mainly depends on the IgMRF/IgGRF ratio. | |
| 2674317 | Methotrexate pneumonitis: a case report and summary of the literature. | 1989 Sep | Methotrexate is used to treat a growing number of malignancies, severe rheumatoid arthritis, and refractory psoriatic arthritis. Pneumonitis induced by the drug occurs in a small percentage of patients and is usually associated with fever, cough, dyspnea, and restrictive pulmonary disease. Severe reactions may progress to respiratory failure. Early recognition of the toxicity is important, and discontinuation of the drug and therapy with corticosteroids usually lead to dramatic improvement. | |
| 2217959 | Rheumatic diseases of childhood. | 1990 Aug | Development of diagnostic criteria for juvenile rheumatoid arthritis, systemic lupus erythematosus, a juvenile dermatomyositis, as well as advances in molecular biology, have assisted epidemiologic study of the rheumatic disorders of childhood. It may be misleading to extrapolate the incidence and prevalence of pediatric forms of arthritis from population studies of adults. Additional study of the frequency of childhood musculoskeletal disorders is very much needed. Classification criteria for Kawasaki syndrome, fibrositis in children, and the juvenile spondyloarthropathies are also desirable. | |
| 2664165 | Salmonella septic arthritis in systemic lupus erythematosus. The importance of chronic car | 1989 Feb | Salmonella bacteremia is more frequently seen in hospitalized patients with systemic lupus erythematosus (SLE) than in hospitalized patients with other diseases. In our experience. Salmonella enteritidis septic arthritis is more common in SLE than in patients with others connective tissue diseases. We report that 4 of 7 patients with SLE with glomerulonephritis and history of Salmonella enteritidis septic arthritis were chronic carriers of this bacteria, since positive cultures were obtained from feces, bone marrow and bile fluid from 20 84 months after Salmonella arthritis developed. In contrast, none of 24 patients with SLE without a history of Salmonella arthritis were chronic carriers and only one of 12 patients with rheumatoid arthritis had positive bile culture to S. typhi while otherwise being asymptomatic. From our study we conclude that patients with active SLE who have gomerulonephritis are at increased risk of becoming chronic carriers of Salmonella enteritidis and of developing Salmonella arthritis once combined prednisone cyclophosphamide treatment has begun. A chronic Salmonella carrier state must be ruled out in patients with active SLE living in endemic zones, before initiating immunosuppressive therapy. | |
| 1968355 | Sulphasalazine in psoriatic arthritis: a double-blind placebo-controlled study. | 1990 Feb | Sulphasalazine (SASP) is now accepted as an effective slow-acting antirheumatic drug for treating active rheumatoid arthritis (RA), but has not been previously evaluated in psoriatic arthritis. An earlier open study suggested that it was well tolerated and potentially beneficial. The present double-blind placebo-controlled trial of 30 patients has now confirmed its efficacy. Greater improvement occurred in those patients on active treatment than on placebo, with more benefit being detected in those patients with the symmetrical polyarticular but seronegative pattern of arthritis associated with a high acute-phase response. SASP was stopped in 26% because of side-effects but these were mild. No exacerbation or remission of psoriasis was observed. Further studies are in progress to determine the degree of efficacy of SASP in different clinical subgroups of psoriatic arthritis. | |
| 3278836 | Causes and management of shoulder arthritis. | 1988 Feb | We recommend that physicians distinguish shoulder arthritis from periarticular disorders. A specific diagnosis should be made in the former, if possible. A number of arthritides have frequent shoulder involvement, and they should be kept in mind. Septic arthritis should always be suspected when there is acute pain and swelling. Joint fluid aspiration should almost always be performed when fluid is present. The diagnosis of gout or CPPD deposition disease usually requires crystal identification from joint fluid for diagnosis. Treatment of shoulder arthritis with oral anti-inflammatory medication is usually indicated; appropriate treatment of the underlying disorder, e.g., rheumatoid arthritis, is necessary. Physical therapy started early, often combined with IA corticosteroids, helps to maintain or improve shoulder motion. | |
| 2497256 | Serum hyaluronate as a marker for disease severity in the Lactobacillus casei model of art | 1989 Jan | Serum concentrations of hyaluronate may provide a clinically relevant, quantitative marker of disease in patients with active rheumatoid arthritis (RA). We studied the utility of serum hyaluronate in an animal model, with features reminiscent of human RA, in which LEW/N female rats were made arthritic by intraperitoneal injection of sonicated Lactobacillus casei. When serum hyaluronate was measured by an inhibition ELISA, a dose dependent correlation was found between the amount of L. casei injected and both joint score and serum hyaluronate in the chronic phase of the disease. A linear correlation between the chronic phase joint score and serum hyaluronate was observed (r = 0.69, p less than 0.001). Two orally administered compounds, flurbiprofen (20 mg/kg) and methotrexate (0.125 mg/kg), were effective in decreasing both variables. Thus, serum hyaluronate may have utility in evaluating the therapeutic efficacy of antirheumatic/antiinflammatory agents in vivo in the chronic phase of RA-like diseases. | |
| 1877561 | Decreasing severity of chronic uveitis in children with pauciarticular arthritis. | 1991 Sep | We compared the current prevalence and severity of chronic uveitis in children with pauciarticular juvenile rheumatoid arthritis in Seattle, Wash, with that of children with the same condition in the same area in 1975. The prevalence of eye disease decreased from 45% in 1975 to 13% in 1989, and the proportion of patients with severe visual loss decreased from 21% in 1975 to none in 1989. We could not attribute these findings to differences in known risk factors for iritis, such as age, sex, or presence of antinuclear antibodies. There was no difference in the duration of follow-up between the two groups. It is possible that the decline in prevalence of uveitis reflects a referral bias for eye disease in the 1975 population. However, the decrease in disease severity remains unexplained and may represent more effective treatment, earlier surveillance for ocular disease, or a change in the frequency of ocular manifestations of this disease in the 1989 group. | |
| 1795322 | A prospective analysis of patients with rheumatic diseases attending referral hospitals in | 1991 Dec | In a 10-month prospective study a research assistant identified 411 patients with rheumatic disease at the 2 referral hospitals in Harare. Rheumatic disease accounted for less than 1% of hospital admissions. Rheumatoid arthritis, the commonest condition, accounted for 18% of patients, many of whom had impaired functional capacity. Septic arthritis (16%) was common in younger patients, often affecting the hip or knee and often associated with other complications of disseminated staphylococcal infection. Osteoarthritis (9%), rheumatic fever (7%), gout (6%), human immunodeficiency virus associated musculoskeletal problems (6%) and systemic lupus erythematosus (5%) were relatively common while the spondyloarthropathies occurred less frequently. The spectrum of rheumatic disease seen in teaching hospitals in Harare, although significantly different from that seen in Europe and North America, approximates the pattern seen in developed countries more closely than previous studies from Africa would suggest. | |
| 3072679 | Radiologic review: the cervical spine in juvenile rheumatoid arthritis. | 1988 Feb | In our patients, zygapophyseal joint fusion was the most frequent and characteristic roentgenographic finding of cervical spine involvement in JRA. It was not associated with any subset of patients. Atlanto-dens interval greater than 4.5 mm was present in 20% of patients, but was not related to the development of neurologic manifestations. Mild enthesopathic-like changes around the upper cervical area were observed in some children. In patients with severe long standing disease and extensive zygapophyseal joint fusion, longitudinal ligament calcification was observed. Growth disturbances of the cervical spine were more frequently observed in patients with zygapophyseal joint fusion and earlier onset of disease. | |
| 3212407 | Adenosine deaminase activity in joint effusions. | 1988 | The activity of adenosine deaminase (ADA) was determined in serum and synovial fluid of 98 patients with joint effusions of various causes. Compared with osteoarthritis, there were significantly higher mean synovial fluid ADA activities in seropositive rheumatoid arthritis (p less than 0.01), chronic seronegative polyarthritis (p less than 0.001), juvenile chronic arthritis (p less than 0.001) and reactive arthritis (p less than 0.001). In inflammatory joint diseases higher mean ADA activities in synovial fluid than in serum were observed, indicating a local release of ADA by cells within the joints. ADA activity in synovial fluid correlated with general disease activity as measured by haemoglobin concentration and erythrocyte sedimentation rate, and may provide an additional measure of the degree of inflammation in joint diseases. | |
| 3626523 | Morphometric quantitation of histopathologic changes in articular cartilage in an immunolo | 1987 Sep | An immune arthropathy was induced in New Zealand white rabbits by intradermal sensitization with complete Freund's adjuvant containing Mycobacterium butyricum followed by intra-articular administration of the bacterial antigen. Half of the animals were treated with 1 mg/kg/day of prednisolone sodium phosphate for 8 weeks by gavage beginning with the day of intra-articular challenge, while the remaining rabbits received the drug vehicle alone. By morphometric analysis (matrix/chondrocyte lacunae area ratio), we observed a significant decrease in cellularity in the arthritic articular cartilages from the vehicle control group. By contrast, there was a significant increase in cellularity in the patella, femoral and tibial cartilages of the steroid-treated animals as compared with that observed in the contralateral control joint. This study suggests that image analysis provides a reliable means for evaluation of architectural changes in the articular cartilage and allows for meaningful quantitation of the chondroprotective effects of drugs like prednisolone. | |
| 1821907 | [Septic arthritis in connective tissue diseases and other chronic arthropathies]. | 1991 | In order to describe the features of septic arthritis (SA) in patients with connective tissue diseases (CTDs), a series of 17 CTD cases with SA episodes were studied retrospectively. The most common CTDs were systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). Involvement was oligoarticular in 64% of cases and mono-articular in the remainder. Clinical, radiological and laboratory findings proved insufficient to allow differential diagnosis between SA and an underlying arthritic flare-up, which could only be carried out by bacterial isolation from synovial fluid. The most frequent etiological agent was Staphylococcus aureus (Table 1). Throughout, patients were treated by needle drainage together with antibiotics, first by parenteral (average 17 days) and later by oral route (average 46 days). Cases with greater diagnostic delay and initiation of therapy were those requiring arthrotomy and those who presented more complications mainly osteomyelitis and permanent disability (Table 2). | |
| 2731993 | Immunity to ocular and collagen antigens in childhood arthritis and uveitis. | 1989 | Humoral and cellular immunity to ocular antigens (S antigen and alpha, beta heavy, beta light, and gamma crystallins) and connective tissue antigens (type I, II, III, and IV collagens) were studied in children with juvenile rheumatoid arthritis (JRA) with or without uveitis and in controls. There was no association between the presence of uveitis and antibody to any collagen type or of lymphocyte transformation to type II collagen. Antibodies to all crystallins were more common in children with JRA than in controls, and antibodies to BH crystallins were more frequent in children with JRA and uveitis than in those with JRA alone. Such reactivity did not appear to represent antibody cross-reactive with collagen antigens. Lymphocyte proliferation to alpha crystallin was increased in JRA with or without uveitis, whereas lymphocyte response to S antigen was associated with the presence of uveitis. | |
| 2445311 | Clinical and laboratory studies of inflammatory polyarthritis in patients with leprosy in | 1987 Sep | The results of a combined clinical and laboratory study in 55 patients throughout the leprosy spectrum are reported. Thirty one of these patients suffered from an inflammatory peripheral polyarthritis which has not been previously described and which was unassociated with the characteristics of erythema nodosum leprosum reactions or with Charcot's joints. alpha 2 Macroglobulin was raised significantly only in those patients with leprosy and arthritis. | |
| 2684320 | Sex hormones and autoimmune disease. | 1989 | Evidence for the influence of sex hormones--androgens, oestrogens and progestogens--on autoimmune disease is reviewed. Androgens and, perhaps, progestogens may protect from autoimmune disease; oestrogens seem to protect from rheumatoid arthritis but to be deleterious in systemic lupus erythematosus. | |
| 3106790 | [Spectrum of post-enteritic reactive arthritis in childhood]. | 1987 Feb | Eleven children (7 boys and 4 girls) suffered from reactive arthropathies following an enteritis. Mean age at onset of disease was 9.7 years (range 3.3-14.5 years). Six children had a classical Reiter's syndrome and two a juvenile spondyloarthritis diagnosed earlier. In 10/11 children, onset of disease was within 5 weeks following a febrile enteritis. The enteritis was confirmed in all 6 cases examined during the first three months after onset of disease. The arthritis was predominantly oligoarticular and affected mostly the joints of the lower extremities and toes. Recurrent enthesopathies and arthralgias occurred in most children. HLA-B27 was positive in 9 (82%). During a follow-up of 0.9 to 6.7 years, arthritis relapsed in most of the patients and 4 children had severe arthritis, and 5 sacroiliitis. Urethritis and occular signs relapsed frequently, but there were no noticeable disabilities. Two other girls had self-limited arthralgia and erythema nodosum following a febrile enteritis. This disease may represent the first stage of the broad clinical spectrum of the reactive arthropathies. In our outpatient clinic of paediatric rheumatology, 9% of 127 patients had reactive arthropathies. They show close relationships to each other and to other HLA-B27-associated spondyloarthropathies. The differentiation of this group of diseases from the juvenile rheumatoid arthritis is possible and relevant. | |
| 3070727 | Rheumatoid factors in subacute bacterial endocarditis and other infectious diseases. | 1988 | Rheumatoid factors (RF) occur during the course of various infections such as leprosy, infective endocarditis, tuberculosis, trypanosomiasis, visceral larva migrans, infectious mononucleosis, influenza A, hepatitis A or cytomegalovirus. When first described it seemed logical to assume that host-self-immunization with autologous immune complexes provided the initial stimulus for RF production. Subsequently extensive characterization of bacterial, parasitic and viral Fc receptors has suggested an alternative explanation for rheumatoid factor associated with infections. It seems possible that patients make an initial immune response to infecting agent Fc receptors and that anti-anti-Fc receptors or anti-idiotypes either then directly stimulate rheumatoid factor production or are themselves rheumatoid factors. Such a hypothesis might also be applied to rheumatoid arthritis itself where either infecting agent or autologous cell Fc receptors could be the initial immunizing epitopes involved in rheumatoid factor production. | |
| 2476134 | Inhibition of in vitro vascular endothelial cell proliferation and in vivo neovascularizat | 1989 Sep | Neovascularization in the rheumatoid synovium plays an important role in the propagation of rheumatoid synovitis because the emigration of mononuclear cells and the growth of pannus are critically dependent on the development of small blood vessels. Inhibition of local vascular endothelial cell (EC) proliferation, which is essential for growth of these vessels, therefore, would have the potential to suppress rheumatoid inflammation. We investigated the effects of methotrexate (MTX), low doses of which are commonly administered to rheumatoid arthritis patients, on DNA synthesis by human umbilical vein EC in vitro and on rabbit corneal neovascularization in vivo. MTX inhibited both basal and EC growth factor-stimulated tritiated deoxyuridine (3H-UdR) incorporation into EC in a dose-dependent manner. Significant inhibition was observed at a concentration of 5 x 10(-9) M, which is that attained in the serum of treated patients. Neovascularization in vivo was also suppressed by low-dose intramuscular injections. These results suggest that MTX has an antiangiogenic effect, and may suppress rheumatoid inflammation through the reduction of synovial small blood vessels responsible for mononuclear cell infiltration and proliferation of synovial tissue. |