Search for: rheumatoid arthritis methotrexate autoimmune disease biomarker gene expression GWAS HLA genes non-HLA genes
| ID | PMID | Title | PublicationDate | abstract |
|---|---|---|---|---|
| 6270331 | Rabbit synovial tissue in culture: influence of the inflammatory state in vivo on the secr | 1981 May | Primary rabbit adherent synovial cell monolayer cultures were prepared from animals with antigen-induced synovitis. Primary cultures derived from chronically inflamed tissues released elevated levels of collagenase into the culture media compared to cultures derived from either normal or acute inflammatory tissues. No active of latent collagenase activity was detected in media of cultures derived from normal tissues grown under identical conditions. Cultures of acute inflammatory tissues secreted 1/4 to 1/10 the amount of collagenase when compared to cultures from chronically inflamed tissues. Collagenase secreted by cultures from inflammatory tissues was detected only in latent form. Fetal bovine serum enhanced the trypsin activation of latent collagenase produced by these cultures. | |
| 6785434 | Cell-mediated immune responses of synovial mononuclear cells to sexually transmitted, ente | 1981 Mar | 3H-thymidine uptake responses by synovial mononuclear cells to stimulation with sexually transmitted, enteric and mumps antigens were studied in 12 patients with "sexually transmitted Reiter's syndrome", 5 with "enteric Reiter's syndrome", 5 with rheumatoid arthritis, 4 with ankylosing spondylitis and 10 with "indolent arthritis of one knee." The "sexually transmitted" and salmonella cases were distinguishable by the responses. Synovial responses were sometimes marked when peripheral blood responses were negligible. | |
| 6608184 | [Interaction between fibronectin and aggregated IgG]. | 1983 Dec 23 | The present study shows that plasma fibronectin forms complexes with aggregated human IgG (a model for immune complexes) and that the resulting complexes precipitate spontaneously or after addition of PEG from buffered saline. However, no clearcut interaction was observed in serum or synovial fluid. Two currently-used immune complex assays, the C1q solid phase assay and the conglutinin binding assay in a commercial inhibition variant, were tested as to their reliability in the presence of fibronectin. While the C1q-dependent assay showed low susceptibility to fibronectin, the conglutinin binding assay gave increased immune complex values in the presence of pathological concentrations of fibronectin. | |
| 6202210 | A possible mechanism of immunoregulation produced by alpha 2-macroglobulin. | 1983 | Most of the plasma suppressive activity was associated with alpha 2M in both normal subjects and cancer patients. alpha 2M binding to physiological levels of proteases was associated with an increase in the ability to suppress lymphocyte reactivity in the TEEM test. alpha 2M binding to proteases released a peptide that was a component of the alpha 2M; this peptide suppressed lymphocyte reactivity to mitogenic, antigenic, and allogenic stimuli in the TEEM test and in the lymphocyte transformation assay. Physically and biologically similar peptides have been found in the plasma of cancer patients and patients with thermal burns, uremia, and acute pancreatitis. | |
| 308747 | [Thrombocytosis in progressive generalized sclerosis (scleroderma) and in other rheumatic | 1978 Jul | A platelet count was made in 37 patients with Progressive Systemic Sclerosis (PSS), 6 with Sjögren's Syndrome, 11 with Rheumatic Polymyalgia with or without Horton's Arteritis (PMR-AH), 26 with Ankylosing Spondylitis (A.Sp.), 29 with Psoriatic Arthritis, 15 with Gout and in 65 healthy subjects. In this last group the mean platelet count was 215.692/mm3, S.E. 4.167. In the various groups of patients the following mean platelet counts were determined: PSS 242.108 +/- 11.766; Sjögren 245.000 +/- 22.620; PMR-AH 276.818 +/- 25.577; A.Sp. 272.846 +/- 14.124; Psoriatic Arthritis 245.833 +/- 9.374; Gout 265.333 +/- 24.628. Statistical analysis showed a significant difference (P less than 0.05), (P less than 0.01) or (P less than 0.001) between each group of patients and the controls. However, the platelet count in the majority of patients in each group was not higher than 300.000/mm3. Statistically significant correlations were found between platelet count and some biolgoical inflammation parameters. All patients with platelets higher than 300.000/mm3 showed a high disease activity. Yet some patients with marked inflammation did not present thrombocytosis. According to literature data thrombocytosis in Rheumatoid Arthritis is considered to be correlated to disease activity. The results of this study indicate that even in other rheumatic diseases thrombocytosis is often present, apparently correlated to the inflammation. Therefore thrombocytosis is an inflammation parameter; but it is less sensitive than other ones. | |
| 63120 | Rheumatic diseases. 1. Differential diagnosis. | 1976 Dec | In a case of rheumatic disease, the patient's history and a careful physical examination should yield most of the information needed to identify the specific disorder present. A convenient classification is based on four differentiating features: number of joints affected, acuteness or chronicity of disease, absence of joint involvement, and anatomic distribution. | |
| 4052055 | The behaviour of caeruloplasmin in stored human extracellular fluids in relation to ferrox | 1985 Sep 1 | No Cu(II) ion is measurable in human serum or synovial fluid by the phenanthroline assay. On storage of human serum or synovial fluid at 4 degrees C, phenanthroline-detectable copper appears, lipid peroxidation occurs, ferroxidase I activity declines and ferroxidase II activity rises, yet there is no fall in immunologically detectable caeruloplasmin. Storage of body fluids at -20 degrees C or -70 degrees C slows, but does not prevent, these deteriorative changes. It is suggested that the presence of low-molecular-mass Cu(II) ion complexes, ferroxidase II activity, "cytotoxic factors' and "immunosuppressive factors' in body fluids may be, in part or in whole, an artifact of the storage and handling of the fluids. A report [Blake, Blann, Bacon, Farr, Gutteridge & Halliwell (1983) Clin. Sci. 64, 551-553] that the caeruloplasmin present in rheumatoid synovial fluid is deficient in ferroxidase activity is shown to be such an artifact. It is strongly recommended that all such experiments be performed upon freshly taken fluid samples. | |
| 310882 | Free serum ribonucleoprotein in mixed connective tissue disease and other connective tissu | 1978 Winter | Free ribonucleoprotein (RNP) was found by means of a hemagglutination inhibition assay in 21 sera from 11 of 25 patients with mixed connective tissue disease (MCTD) who had 299 sera studied. Free RNP tended to appear when anti-RNP antibody titers fell or when prednisone was initiated or increased. Five of 72 SLE patients (211 sera) had free RNP in at least one serum. Three of them had anti-RNP antibodies in other sera. Free serum RNP was found in one of 20 patients with scleroderma and in two of seven patients with connective tissue disease "overlap" syndromes without anti-RNP. | |
| 6228081 | Enzyme immunoassay for IgG and IgM antibodies against dsDNA and ssDNA. | 1983 Sep | Two enzyme-linked immunosorbent assays (ELISAs) for the detection of DNA antibodies are presented, one using lambda-phage DNA for the detection of dsDNA antibodies, the other using denatured calf thymus DNA for ssDNA antibodies. It was shown that only dsDNA antibodies of the IgG class were specific for SLE. IgM-dsDNA antibodies or ssDNA antibodies were not SLE-specific. Of 62 SLE patients 58% were positive for IgG-dsDNA antibodies. When only those patients with active disease were considered, 88% were positive. There was a positive correlation between the levels of IgG-dsDNA antibodies and the incidence of nephritis. When the ELISA for IgG-dsDNA antibodies was compared with the filter assay, the ELISA showed a considerably higher sensitivity. | |
| 836340 | Lactoferrin and lysozyme levels in synovial fluid: differential indices of articular infla | 1977 Jan | Lysozyme and lactoferrin levels were measured in 71 synovial fluids (SF) of patients with traumatic effusions, osteoarthritis, rheumatoid arthritis, pseudogout, septic arthritis, and gout, as well as in 91 synovial fluids graded according to their neutrophil count. Elevated lysozyme levels were found in all the inflammatory arthritides and also in osteoarthritis. Lactoferrin levels were not increased in osteoarthritis but displayed a close correlation to the extent of the inflammatory response as judged by SF neutrophilia. The ratio of lysozyme to lactoferrin decreased progressively with increasing SF neutrophilia. In vitro experiments showed that lactoferrin is released from neutrophils isochronously with lysozyme and beta-glucuronidase. Lactoferrin was not found in hyaline cartilage, a tissue known to contain lysozyme. These results are consistent with belief that SF lysozyme has a major derivation from both cartilage and neutrophils, and that lactoferrin arises only from neutrophils. These findings indicate that the simultaneous measurement of lysozyme and lactoferrin provides a potentially useful index of both joint inflammation and cartilage degradation. | |
| 582233 | Peliosis hepatis. Report of nine cases. | 1979 May | Nine cases of peliosis hepatis are reported: five of these were associated with the administration of androgen or anabolic androgenic steroids and a sixth with large doses of medroxy-progesterone acetate. In five instances, neoplasm was present as an underlying disease. Antemortem evidence of liver disease was detected in six of seven cases but was not severe and had not contributed to death. The pathogenesis of blood-filled cystic cavities is discussed and the literature reviewed. Angiopathy of hepatic sinusoids in patients with wasting diseases or in those receiving androgens in coexistence with passive congestion of the liver appear to be factors in the pathogenesis of pleiosis hepatis. | |
| 3879751 | Gentisate, a salicylate metabolite with antioxidant properties. | 1985 | Concentrations of gentisate found in plasma and synovial fluid were in excess of concentrations required to exert an antioxidant effect in vitro. Studies of diphenol/aminophenols suggested that an ortho or para configuration of functional groups was required for this in vitro antioxidant activity. Animal studies indicated some correlations between in vitro activity and pharmacology of these agents. | |
| 3919398 | Inactivation of interferon by serum and synovial fluids. | 1985 Mar | The stability of interferons-alpha, -beta, and -gamma (IFN) in serum and synovial fluids were compared. Interferon-beta was the least stable interferon species, losing at least 75% of its activity during incubation in samples of both serum and synovial fluid. Interferon-alpha was the most stable IFN, but interferon-gamma under these conditions approached the stability of the alpha species. The inactivation of IFN-beta was found due to dialyzable factors and hence not classical antibodies. | |
| 3837535 | Apheresis: clinical response to patients unresponsive to conventional therapy. | 1985 | Ten of 13 (76.9%) rheumatoid arthritis (RA) patients having intensive cryofiltration treatment showed improvement and 5 of 7 (71.4%) of RA patients treated on maintenance cryofiltration therapy showed improvement. Encouraged by these results, 2 centers were established for controlled trial studies of RA patients. Four of 4 (100%) rheumatoid vasculitis patients treated by cryofiltration and 4 of 7 (57.1%) patients treated with plasma exchange showed clinical improvement. An SLE patient with thrombocytopenia showed a dramatic rise in platelet count during intensive (3 day/wk) plasma exchange treatments despite little prior response to drugs, platelet infusions and splenectomy. Plasmapheresis was effective in improving clinical symptoms and lipid abnormalities in a primary sclerosing cholangitis patient without causing hypoproteinemia during the long-term therapy (4 yrs). | |
| 2858925 | Anaesthesia in connective tissue disorders. | 1985 Mar 2 | Patients with the more common connective tissue disorders require surgical operations more frequently than has been realized. They may present the anaesthetist with many potential problems. A few minutes of careful questioning and examination pre-operatively may prevent a tragic situation. A history of drug therapy is essential pre-operative information, particularly since many of these patients will need augmentation or coverage with steroid drugs. The anaesthetist must be aware of the patient's general state of health and must search for evidence of pulmonary, cardiac or haematological abnormalities. | |
| 379697 | [A new approach to immunotherapy: the transfer factor]. | 1979 May 26 | The transfer factor is a tiny molecule capable of transferring the function of the T lymphocytes (immunological memory and retarded hypersensitivity) from a sensitized to a non-sensitized individual. The exact structure and action modalities of the molecule have not yet been precisely established. The difficulties involved in the study of the transfer factor are aggravated by the lack of any suitable experimental model. The attention of immunologists is attracted by this factor which opens up new prospects for the treatment of cancer, immunological deficiencies and certain infectious and autoimmune diseases. More profound research would appear useful to evaluate if and in what cases a potentiation of the immune mechanism can represent an alternative to immunosuppression. | |
| 6826782 | Relation between antithrombin III and clinical and serological parameters in systemic lupu | 1983 Mar | The increased frequency of thromboembolic events in patients with systemic lupus erythematosus (SLE) has been attributed to reduced or dysfunctional antithrombin III (At-III). We analysed At-III values, measured by three different assay techniques, in SLE patients, patients with rheumatoid arthritis, and normal and hospitalised controls. In addition, attempts were made to correlate At-III activities of SLE patients with specific clinical and serological parameters such as disease activity, renal involvement, previous thrombosis, degree of proteinuria, and serum complement concentrations. Our results failed to show a significantly reduced At-III in SLE with any method. At-III titres did not correlate with disease activity, concentrations of serum complement or albumin (both only minimally reduced in most patients), or a previous history of thrombosis. At-III deficiency does not appear to be an inherent feature of SLE, and reduced activities should only be anticipated when there are specific aetiological factors present, such as massive proteinuria, extensive hepatic disease, or active thrombosis. | |
| 6232779 | Studies of polyarthritis caused by Mycoplasma arthritidis in rats. I. Detection of the per | 1983 Mar | Investigations on Mycoplasma (M.) arthritidis polyarthritis of the rat produced by intravenous inoculation of M. arthritidis ISR 1 with special reference to the persistence of the inoculated mycoplasma antigen were performed in a total of 145 rats. The mycoplasmas were demonstrated by the conventional culture technique as well as by an enzyme immune assay (EIA). M. arthritidis was cultured from liver, kidney, spleen, and thymus up to 4 days, from trachea and uterus up to 4 weeks, and from lung, heart, brain, and lymph nodes up to 2 months after infection. It could be recovered from the joints in 70-80% of the animals up to 28 days and in the remaining 20-30% up to 200 days after infection. Using the EIA the mycoplasmal antigen could be demonstrated generally, also in the joints of infected rats which had no longer been positive by culture (10-20 weeks after inoculation). The investigations using EIA also showed a positive reaction between antiserum against M. arthritidis and joint homogenates of control rats, indicating the presence of common antigens to M. arthritidis and to joint tissues of the rat. | |
| 6789016 | [Circulating immune complexes-like material and complement in rheumatoid arthritis and ank | 1981 Apr 25 | Circulating immune complexes (IC) in 52 rheumatoid arthritis (RA) seropositive, 25 RA seronegative and 32 ankylosing spondylitis (AS) patients were assayed by two methods: 1) precipitation with a final 2% polyethylene glycol (PEG) concentration with immunoglobulins (Igs) quantitation in the precipitate and 2) the ability of IC to consume complement, evaluating conversion products from human C3 by bidimensional rocket immunoelectrophoresis. CH50, C3, C4, C3PA and circulating C3 conversion products were quantitated. IC precipitates with 2% PEG contained three classes of Igs: IgG, IgM and IgA, the latter being the most rare. In the control group Igs level precipitated with 2% PEG were: 2% PEG-IgG 2.5 mg/100 ml +/- 2; 2% PEG-IgM 0.72 mg/100 ml +/- 1.09; 2% PEG-IgA 0.04 mg/100 ml +/- 0.18. With 2% PEG IC-like material was detected in 58.5% of RA seropositive patients but none generated C3 conversion products. With neither methods was IC-like material detected in the RA seronegative group and none with 2% PEG in AS, either. However, in the latter, 21.8% generated C3 conversion products and 18.7% circulating C3 conversión products. In the RA seropositive patients no correlation was observed between the levels of 2% PEG-IgG and 2% PEG-IgM and the titre of antinuclear antibodies (ANA) nor between 2% PEG-IgG and that of IgG in serum. However, there was a low correlation between 2% PEG-IgM and that of IgM in serum and between 2% PEG-IgG and 2% PEG-IgM with rheumatoid factor (RF). It should be stressed that the value of the PEG method in the detection of IC-like material must be reconsidered, since using a 2% final concentration and a specific evaluation of Igs and complement components in the precipitate, it may be a method easy to perform and useful for clinical purposes. | |
| 191905 | [Biochemistry of collagen and locomotor apparatus. Hereditary diseases of the connective t | 1977 Mar | In inflammatory granuloma, synovial sclerosis or inflammation and in Dupuytren's contracture, the neocollagen contains chains and/or transverse links that are characteristic of rapidly growing immature tissues. In arthrosis, a conversion of collagen synthesis towards a cutaneous type may occur. The destruction of cartilage in rheumatoid arthritis is brought about by a specific collagenase that originates from the inflamed synovial membrane. Finally, certain forms of osteoporosis may be due to alterations of the osseous collagen which impair the mechanism of calcification. |