Search for: rheumatoid arthritis methotrexate autoimmune disease biomarker gene expression GWAS HLA genes non-HLA genes
| ID | PMID | Title | PublicationDate | abstract |
|---|---|---|---|---|
| 6824256 | NIH Conference: Immunoglobulin G Fc receptor-mediated clearance in autoimmune diseases. | 1983 Feb | The reticuloendothelial system is thought to play an important role in removing immune complexes and other immunologically active substances from the circulation via interaction with specific cell-surface receptors. The function of the reticuloendothelial system in humans with autoimmune diseases was studied in vivo by measuring the rate of removal of IgG-coated, radio-labeled autologous erythrocytes. Such cells are removed by phagocytic cells of the spleen, and the process depends on the presence of an intact IgG Fc fragment. Studies in patients with active systemic lupus erythematosus show a profound defect in Fc-receptor-specific clearance that correlates with disease activity. Patients with other autoimmune diseases have defects in Fc receptor functional activity when their illness is characterized by tissue deposition of immune complexes. Normal patients with HLA-B8/DRw3, an HLA type associated with an increased incidence of autoimmune disease, also have an increased incidence of defective Fc receptor-specific functional activity, suggesting that this defect may predispose patients with this haplotype to develop manifestations of immune complex-mediated disease. | |
| 3878641 | [Streptococcus antibodies in a rural population and in patients with inflammatory rheumati | 1985 Sep | An account is given of assessed titres of anti-streptolysin O (ASO) and antihyaluronidase (AH) in rheumatic fever, in rheumatic patients of inactive phase and in tonsillitis. The ASO titre was examined in 1739 members of the general public and in 360 patients with chronic rheumatic diseases. The author analyses 6235 examinations of ASO titres and 1210 AH examinations. In rheumatic fever the mean maximum ASO titre was 397 u, while the mean maximum AH titre was 3583 u. In inactive phase rheumatic patients the mean ASO titre was 187 u, the mean AH titre 630 u. The mean ASO titre at the onset of the disease in tonsillitis was 172 u. During the second examination after 3-4 weeks, the mean rise of the ASO titre was 205 u. A increased AH titre above 1280 u was recorded during the first examination in 35.2%, during the second examination in 52.3%. The mean ASO titre in the population group comprising 1739 subjects was 148 u. A titre increased above 200 u was recorded in 20.7%. The mean ASO titre in rheumatoid arthritis was 139 u, in ankylosing spondylitis 199 u, in systemic lupus erythematosus and diffuse scleroderma 128 u. In all groups the ASO and AH levels were inversely proportional to the age of the examined subject. Attention is drawn to the correct evaluation of the assessed antibody titres. | |
| 6703984 | Static perimetry in chloroquine retinopathy. Perifoveal patterns of visual field depressio | 1984 Mar | Results of threshold static perimetry in nine cases of toxic retinopathy produced by chloroquine phosphate and hydroxychloroquine sulfate are reported. Pericentral visual field defects in an advanced case correlated well with ophthalmoscopically visible defects in the pigment epithelium. In a less advanced case, perifoveal defects in the visual field of one eye were found to be demonstrable in the absence of any fundus abnormalities by either ophthalmoscopy or fluorescein angiography. In both cases, visual field defects were deepest on the superior or vertical meridian, just above the point of fixation. Since defects were found to be deepest along the superior vertical meridian, threshold static perimetry that includes this location should be the most sensitive method of detecting the early stages of visual field damage in chloroquine retinopathy. | |
| 133645 | Analgesic and anti-inflammatory activity of 6-chloro-alpha-methyl-carbazole-2-acetic acid | 1976 Mar | The carbazole, C-5720, has the same order of analgesic, antipyretic and anti-inflammatory activity as indomethacin and is more potent than phenylbutazone and acetylsalicylic acid in the yeast inflamed paw, the carrageenin foot edema, the Mycobacterium butyricum-induced pyrexia, and the acute and chronic adjuvant arthritis tests. In chronic adjuvant arthritis in rats, C-5720 lowers the elevated serum mucopolysaccharide and plasma fibrinogen levels, and partially restores the depressed liver N-demethylase activity. C-5720 is 16 times less active than indomethacin in the production of gastric ulcers in rats and is about 70 times less active than indomethacin in blocking arachidonic acid-induced diarrhea in mice. C-5720 has a greater safety margin than indomethacin with respect to the production of gastric ulcers or the blockade of diarrhea and the reduction of inflammation in adjuvant-induced polyarthritis. | |
| 329348 | Application of the radiological sciences to advance clinical and fundamental knowledge of | 1977 Sep | Many radiological techniques are useful in fundamental research. Selected clinical problems in animals as well as certain basic research projects are utilized to emphasize the potential of radiological imaging. The author describes the use of several radiological methods in studies of how birds breathe. | |
| 172785 | [Synthetic ACTH in theumatic diseases: (author's transl)]. | 1975 Nov 14 | 44 patients with acute irritations of degenerative articular diseases and 66 patients with soft tissue rheumatism were treated with Synacthen Depot (tetracosactide hexacetate 1 mg/ml). During the first three days of treatment the patients received an average of 2 ampoulbs Synacthen Depot, then treatment was continued at 3-4 day intervals. In the degenerative joint disease group 86.4% and 89.4% in the group with soft tissue rheumatism became free of complaints or improved with the ACTH treatment. Most of the patients with degenerative joint diseases needed a 4 week treatment; 1/3 of the patients with soft tissue rheumatism were already free of complai | |
| 4033308 | [The cervico-cranial syndrome in the practice of the otorhinolaryngologist]. | 1985 Jun | The craniocervical syndrome is an entity whose symptoms: vertigo, cephalea, tinnitus, facial pain, otalgia, dysphagia, pain of the carotid artery are thought to be caused by cervical factors. In the majority of cases the cranio-cervical syndrome is caused by a spondylarthrogenic segmental dysfunction whose pathophysiology is explained. In the pathogenesis lesions of the joints of the skull which may be responsible for pain and dysfunction in the segmental areas are of great importance. The neurology of the joints of the skull, as well as the pathological mechanisms of spondylarthrogenic disturbances, responsible for the different kinds of dysfunction of the equilibrium and for cephalea are discussed. The pathophysiological basis of manual diagnosis is explained; also the radiological findings of the upper cervical vertebral column are principally discussed. A short review of therapeutic recommendations is given. | |
| 3909736 | The determination of specific IgA-antibodies to Yersinia enterocolitica and their role in | 1985 Oct | Specific serum IgA-antibodies, mainly produced in the lymphoid tissue of the gastrointestinal tract (GALT) might exhibit some special characteristics deviating from IgM- and IgG-antibodies: they do not agglutinate nor fix complement. They cannot be determined by usual routine antibody techniques; indirect methods must be used. An antiglobulin-assay was used in an extensive investigation over a two-year period on sera from 8,445 patients to determine IgA-antibodies specific to Yersinia enterocolitica, serotype 3. Y. enterocolitica agglutinins were found in 965 patients, 508 of them with significant titres of greater than or equal to 80. 347 of the 2,111 patients with low titres (10 to 40) had a significantly elevated amount of IgA antibodies. The diagnoses of the IgA-positive patients fell into three groups: acute infections, acute reactive complicatory inflammations, mainly arthritis, chronic inflammatory connective tissue diseases. The IgA-antibody pattern was: In early samples from patients with acute enteric infections they might be the only antibodies present following, largely, during the course of the disease the agglutinating IgM and IgG antibodies, except in patients with long-lasting or chronic complications where IgA antibodies were elevated. It is concluded that determination of specific antibodies of IgA class in cases of Y. enterocolitica infections is an important diagnostic test and, moreover, of prognostic value in the evaluation of chronicity. | |
| 95801 | Evaluation of the C1q solid-phase binding assay for immune complexes. A clinical and labor | 1979 Apr | The solid-phase C1q binding assay for circulating immune complexes has been evaluated. The assay provides a rapid, sensitive (detecting as little as 1 microgram of aggregated IgG) and reproducible procedure for the detection of immune complexes in biological fluids. Using artificially prepared immune complexes, the assay detects complexes at four-times antigen-excess. Gel filtration over Sepharose 6B showed that these complexes were distributed over a range of molecular weights from greater than 4 x 10(6) to 300,000 daltons. Using radiolabelled anti-BSA, antigen (BSA) could be detected in these complexes. Screening of gel-filtered SLE showed that the assay detects complexes of both high and low molecular weight, but does not detect all complexes in the SLE sera. Clinical studies showed that immune complexes are frequently found in the sera of patients with SLE and measurement of the concentrations of complexes provides a more sensitive index of disease activity than either serum C3 or C4 concentrations or DNA binding capacity. In patients with RA concentrations of immune complexes were generally higher in synovial fluid than serum, although a patient with systemic rheumatoid disease with hypocomplementaemia had an extremely high level of circulating immune complexes. The assay only infrequently detects circulating immune complexes in glomerulonephritis and in renal transplant recipients. It is concluded that the assay provides a useful clinical tool, but detects only a limited species of immune complexes. It can be used in the detection of antigens in complexes. | |
| 6605819 | Absorbance nephelometry of C1q-precipitable immune complexes: method comparisons and clini | 1983 Dec | Using a double-beam spectrophotometer, we investigated the clinical utility of a nephelometric method for assaying immune complexes. The complexes were concentrated from serum by precipitation with polyethylene glycol (PEG) and assayed by reaction with C1q. Testing of more than 100 sera showed a Spearman's rank correlation (p) between the present assay and the C1q-binding assay of 0.57, and 0.39 between the Raji cell assay and the present assay. Clinical sensitivity of the methods was not statistically different (p less than or equal to 0.5). Twenty-four of 30 patients with symptoms of disease showed increased concentrations of immune complexes by the present assay; only one of 38 normal individuals showed an increase. In a longitudinal study, we found that the concentrations of immune complexes paralleled clinical changes, indicating good clinical utility. The use of this assay with single-beam analyzers is limited because of the poor aqueous solubility of the PEG precipitate. Ongoing investigations designed to circumvent this problem are described. | |
| 3892383 | Double-blind evaluation of piroxicam and naproxen following missed dosage in patients with | 1985 Jun 26 | We conducted two separate double-blind withdrawal studies in parallel; one involved 20 patients taking piroxicam 20 mg daily, and the other involved 20 patients taking naproxen 750 mg daily. After 48 hour withdrawal of active medication, the naproxen group showed significant deterioration in eight of the 14 parameters measured and the piroxicam group in one of the 14 parameters measured. The deterioration in the naproxen group was significantly greater than that in the piroxicam group in five of the 14 parameters measured. These findings are consistent with the long half-life of piroxicam and suggest that non-compliance leading to omission of piroxicam for two days is of less clinical importance than omission of naproxen for two days. | |
| 6435389 | [Current viewpoints of Sjögren's syndrome]. | 1984 | The authors discuss the pathology, diagnosis and different clinical manifestations of Sjögren syndrome on the basis of a case report in which the patient presented extraglandular pathology and degeneration into lymphoma. It is stressed that Sjögren syndrome is often associated with other diseases of the connective tissue such as rheumatoid arthritis and lupus erythematodes disseminatus. Degeneration into lymphoma is often seen in patients presenting Sjögren's syndrome since many years. | |
| 6237204 | Helper T cell function of rheumatoid synovial tissue lymphocytes. | 1984 Aug | The helper cell profiles of rheumatoid peripheral blood (PBT-RA), synovial fluid (SyT-RA) and synovial tissue (SyN-RA) T lymphocytes were compared both before and after irradiation with similarly treated normal peripheral blood T cells (PBT-N). Deficient helper cell profiles were noted in SyN-RA and were correlated with increased numbers of activated T lymphocytes in culture. Moderately reduced helper cell profiles were seen in PBT-RA and were the result of a functional lack of a radioresistant helper T cell and/or radiosensitive suppressor T cell. SyT-RA, however, showed normal or enhanced T helper cell profiles and similar numbers of activated T cells compared with PBT-RA. Activated helper T cells therefore play an important role in the local immune response in inflamed rheumatoid synovium. | |
| 3886353 | Tiaprofenic acid. A review of its pharmacological properties and therapeutic efficacy in r | 1985 Mar | Tiaprofenic acid is a new non-steroidal anti-inflammatory agent advocated for use in rheumatoid arthritis, osteoarthritis, musculoskeletal disorders, soft-tissue injuries and inflammatory conditions and acute pain of varying origin. Published data suggest that tiaprofenic acid 600 mg daily in 2 or 3 divided doses is comparable in effectiveness with aspirin, diclofenac, ibuprofen, indomethacin, naproxen, piroxicam and sulindac in the treatment of rheumatoid arthritis and osteoarthritis. More controlled clinical trials are necessary to evaluate its potential in rheumatic conditions other than rheumatoid arthritis and osteoarthritis. In controlled studies in patients with acute pain following surgery or trauma, tiaprofenic acid was more effective than placebo and as effective as aspirin and indomethacin. While tiaprofenic acid produced fewer side effects than aspirin in rheumatoid arthritis treatment, and indomethacin in the treatment of osteoarthritis, results have generally shown the short term tolerability of tiaprofenic acid to be similar to that of other non-steroidal anti-inflammatory drugs. As no one of the non-steroidal anti-inflammatory agents is the most suitable drug for all patients requiring such therapy, tiaprofenic acid should be considered along with other drugs of this type in the therapy of arthritic conditions and of acute postoperative or posttraumatic pain. | |
| 136264 | Tuberculosis after corticosteroid therapy. | 1976 Jul | Fourteen episodes of reactivation of tuberculosis after corticosteroid administration are reported. In most a disease impairing the host defences was present and four were taking additional immunosuppressants. The most common presenting symptoms were productive cough and malaise. Bacteriological diagnosis required bronchoscopy in three cases. Response to antituberculosis therapy was good. Five of the 14 episodes manifested dissemination of pulmonary tuberculosis with four occurring in patients receiving high-dose corticosteroids and other immunosuppressants. No prolongation of sputum conversion time was noted in the patients. The published effects of corticosteroids on the tuberculous state are reviewed. Because INH administration may cause liver damage in a small minority of patients, a reassessment is required of the need for INH chemoprophylaxis when corticosteroids are used in patients with healed tuberculosis. | |
| 6983329 | Circulating levels of biologically active parathyroid hormone in rheumatic diseases. | 1982 Dec | There has been doubt as to whether elevated levels of parathyroid hormone, reported previously by radioimmunoassay, reflect increased concentrations of the biologically active hormone. The application of a recently developed, highly sensitive bioassay has shown considerable disparity between bioactivity and immunoreactivity in 5 rheumatic conditions and in normal subjects. Six patients with chondrocalcinosis had elevated levels; 3 of these did not have hypercalcaemia or any obvious cause other than possible subclinical hyperparathyroidism. One patient, assayed during an acute episode, had an elevated concentration of the hormone which reverted to normal when she was asymptomatic. Most patients with osteoarthrosis (13 our of 15) had low normal levels; 2 showed unexplained slightly elevated concentrations. Of 6 patients with haemochromatosis 3 had elevated levels, though this may have been related to the associated presence of diabetes mellitus. A third of patients with ankylosing spondylitis (10 out of 30) showed elevated parathyroid hormone levels but without hypercalcaemia. A number of spondylitic patients also showed anomalous results in this assay, possibly due to the presence of an antagonist. This would be consistent with the absence of clinical or biochemical evidence of hyperparathyroidism. | |
| 14455 | [Gamma-glutamyltranspeptidase in chronic polyarthritis. I. Comparison with a control group | 1977 Jan | Gamma-GT, alcaline phosphatase and other parameters of abnormal liver functions were estimated in 54 consecutive in-patients having active RA but without a previous history or clinical signs of liver disease, and compared with a matched control group, suffering from degenerative rheumatic disease. There was a slight to moderate elevation of gamma-GT in 40.4% of the RA-patients (mean value 27.2 IU/l) and in 32.1% (mean value 22.3 IU/l) of the control group, respectively. The difference was not significant. Abnormal values in the control group occurred mainly in patients with peri-arthropathia of the shoulder, before mobilisation under anaethetic (3 of 5) and - coxarthrosis before total hip replacement (4 of 12). Alkaline phosphatase was elevated in 25.9% of the RA-patients (mean value 41.3 +/- 21.9 IU/l) and in 14.8% of the control group (mean value 34.3 +/- 15.9 IU/l). The difference was significant. There was a correlation between gamma-GT and alcaline phosphatase in the RA-group (r = 0.549, p less than 0.001) but not in the control group (r = 0.102). Abnormal values found in the control group were mainly found among patients with osteoporosis, following fractures, and coxarthrosis. The frequency of abnormal results and the value of the means increased with raising disease activity. Two groups of 30 and 32 patients, respectively, were examined at intervals of 2 or 4 weeks over a period of 6-10 and 18 months, respectively, and showed temporary elevations os gamma-GT in 3/4 of all patients, of GOT in 2/3 of alcaline phosphatase in 1/2 and of GPT in 1/3. Compared with other parameters of liver disease gamma-GT did not react in a different but in a more sensitive way. In our opinion it is the most sensitive indicator of reactive changes of the liver in RA. | |
| 806270 | Immunoglobulin phagocytosis by granulocytes from sera and synovial fluids in various rheum | 1975 Apr | (1) The phagocytosis of human IgG, IgM, and C3 by granulocytes from various rheumatoid and nonrheumatoid sera and synovial fluids (SF) was investigated by direct examination of the patient's leucocytes and indirect testing by incubation of normal donor leucocytes with various sera and SF. (2) In rheumatoid arthritis (RA) phagocytosis of IgM, IgG, and C3 was common from sera and SF. There was a strong correlation of IgM and C3 phagocytosis with the occurence of rheumatoid factor. The phagocytosed IgM is probably rheumatoid factor. In SF both the direct and indirect test method yielded equally positive results; in serum the direct test was negative throughout. (3) In systemic lupus erythematosus there was phagocytosis of IgG, IgM and C3 from serum (indirect test), IgM not being correlated with the latex-fixation test and probably of antinuclear antibody nature. Phagocytosis decreased after treatment of the disease. Sera from many other rheumatic disease frequently gave weak IgG phagocytosis, but rarely did IgM or C3. (4) IgG, and sometimes C3, was frequently taken up from IgG myeloma sera (indirect test). IgM and IgG were taken up from Waldenström's macroglobulinaemia sera, independent of IgM concentration. It is possible that an aggregation tendancy of particular paraproteins determines Ig uptake from these sera. (5) IgG was taken up from half of the studied sera of infectious diseases in the indirect test, including two cases with Hodgkin's disease as well. Three sera from patients with untreated trypanosomiasis were positive for IgG as well as for IgM. (6) Normal healthy control sera remained negative, even after prolonged preservation or frequent freezing and thawing: only among very old sera were a few positive observations recorded. Immunoglobulin phagocytosis appears to be a common phenomenon in a number of conditions. It seems probable that soluble immune complexes, or in other cases nonimmune aggregates, may cause phagocytosis. | |
| 6767275 | Lymphadenopathy associated with dysgammaglobulinemia. | 1980 Jan | Conditions in which lymphadenopathy is associated with dysgammaglobulinemia may be divided into two groups: those in which etiologic factors and pathogenesis are well established, and those which are still a medical dilemma. Only a few belong to the former group: infections, immunizations, and drug-induced conditions being the best examples. Unfortunately, the great majority belong to the latter group. Interestingly enough, many conditions with lymphadenopathy and dysgammaglobulinemia share similar histologic features, such as infiltration with lymphocytes, immunoblasts, plasma cells, and histiocytes. This pleomorphic infiltration may appear together with prominent vascular proliferation. In animal experiments, angiogenesis was induced by administration of immunocompetent lymphocytes into the skin of unimmunized, irradiated mice. Therefore such lymphocyte-induced angiogenesis may be a manifestation of the graft-versus-host reaction. Recent developments in immunology, such as the discovery of many membranous markers and receptors on the lymphocyte membrane, the study of cytoplasmic structure and synthetic products, detection of enzymatic aberrations and chromosomal abnormalities, and refinement in histochemical techniques, have led to attempt to reclassify lymphoplasmacytic and leukemic disorders. Indeed, several classifications coming from different coutries and from various centers in the same country have been proposed, leading to a typical "Tower of Babel" phenomenon. It is obvious that more knowledge of etiologic factors and pathogenetic mechanisms is necessary to classify, cure, and eventually prevent the diseases described in this paper. | |
| 239426 | Influence of the pericellular environment on the cells. The role of mucopolysaccharides in | 1975 Jul 17 | Problems related to rheumatoid arthritis have been investigated by a group at Cambridge using the organ culture technique. Since auto-allergic reactions may be concerned in the chronicity of the disease, the effects of reactive complement-sufficient antisera (AS+C') on embryonic and post-foetal cartilage were examined. The cartilaginous limb bone rudiments enlarged to several times their original volume in control medium, but in the presence of AS+C' they gradually disintegrated, owing to the breakdown of the cartilage matrix; only the superficial cells of the enveloping soft connective tissue were killed, however. Provided breakdown had not advanced too far, the effects of AS+C' were reversible. It was not clear how AS+C' produced these changes, since cartilage matrix is impermeable to molecules as large as the immunoglobulins. To find whether there was a difference in permeability between embryonic and post-foetal cartilage, similar experiments were made on the articular cartilage of young pigs. AS+C' had no effect on pure articular cartilage, and it was shown immunohistochemically that IgG did not penetrate beyond the most superficial layer of cartilage. When, however, the explant was associated with soft connective tissue either as invading marrow or as an adjacent explant of synovium, the cartilage matrix was depleted of proteoglycan; IgG antibodies then entered the cartilage and reacted with the chondrocytes. After a lapse of 8-10 days, collagen also began to break down. If the degradation of collagen was not too extensive, the changes were reversible. Pure cartilage was depleted of proteoglycan by trypsinization and then cultivated in AS+C'. All the chondrocytes reacted with the IgG antibodies. The peripheral cells were killed, but those in the interior survived and rapidly secreted pericellular capsules rich in proteoglycan, which shielded them from further contact with antibodies. In other experiments, pure cartilage was associated with a synovial explant and cultivated in AS+C' for 10 days; this caused severe depletion of the matrix. The synovial tissue was then removed and the isolated cartilage cultured for a further 10 days in either AS+C' or control medium. If mainly proteoglycan had been lost during the primary culture period, breakdown did not continue in AS+C', and sometimes a little new matrix was regenerated, though less than in control medium; if, however, the collagen had been extensively degraded, breakdown continued even in control medium. It is suggested that in both the embryonic and post-foetal cartilage, degradation of the cartilage matrix was due to the enzymatic activity of the associated soft connective tissue which caused a loss first of proteoglycan, which enabled antibodies to reach the chondrocytes, and then of collagen. The possible relevance of these results to the pathogenesis of rheumatoid arthritis is discussed. |