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Query: UMLS:C0409974 (lupus)
 22,386 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Two cases of pathologically confirmed miliary pulmonary tuberculosis complicated with ARDS were presented. Both had systemic lupus erythematous and used maintenance dose of corticosteroid. Case one developed respiratory distress and severe hypoxemia one day postpartum and chest radiograph revealed nodular and miliary infiltrations and pleural effusion. The patient was intubated and placed on a volume-cycled ventilator. A FIO2 of 70% and a PEEP of 0.98 kPa were required to maintain the oxygen tension at 6.95 kPa. The effective compliance of the lung decreased progressively and the patient died 5 days later. Autopsy revealed disseminated tuberculosis extensively involving the lungs, the liver and kidney. The alveoli were filled with edematous fluid with formation of hyaline membranes and micro-atelectasis. Case two developed respiratory distress and pulmonary edema at the third month of pregnancy. Cardiopulmonary arrest occurred when trying to intubate the patient. Postmortem needle puncture of the lungs and liver revealed charges comparable with tuberculosis and ARDS. In considering the relatively high incidence of pulmonary tuberculosis in China, the percentage of miliary tuberculosis as a potential cause of ARDS might not be very low. It is important to maintain a high index of suspicion for this treatable precipitating disorder and initial appropriate therapy early enough in patients with ARDS.
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PMID:[The adult respiratory distress syndrome associated with miliary tuberculosis]. 273 72

Next to oxygen silicium is the most common substance of our environment. It occurs mostly in form of quartz (SiO2). In the past silica was usually mentioned in connection with foreign body granulomas in dermatological papers. Recently relations between occupational silica exposure and several diseases were reported. Silica exposure was related to the development of scleroderma, lupus erythematodes and sarcoidosis. Pathogenetic connections may be due to a stimulating effect on fibroblasts and due to immunmodulating properties of silica.
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PMID:[Quartz--its relevance for dermatology]. 283 Oct 19

We have previously demonstrated that procainamide is oxidized to a reactive metabolite. We speculated that this reactive metabolite might be a hydroxylamine and further that it might be responsible for the syndrome of procainamide-induced lupus. We now report that procainamide is metabolized to a hydroxylamine by rat and human hepatic microsomes. The extent of this metabolic oxidation was quantitated by HPLC after conversion of the hydroxylamine to the more stable nitro derivative of procainamide. Formation of the hydroxylamine required NADPH, active microsomes, and oxygen and was inhibited by carbon monoxide, SKF 525-A, and cimetidine. Formation of the hydroxylamine was also studied as a function of time, microsomal protein concentration, and procainamide concentration.
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PMID:Metabolism of procainamide to a hydroxylamine by rat and human hepatic microsomes. 614 17

Many investigators believe that systemic lupus erythematosus is an autoimmune disease, perhaps caused by inadequate suppressor T lymphocyte activity, which permits the activation of autoantibody producing B lymphocytes. This paper discusses the testable hypothesis that a superoxide-generating, chromosome aberration-inducing factor (clastogenic factor), present in the lymphocytes of lupus patients but absent from normals, is responsible for such a suppressor cell defect. Superoxide or activated oxygen species derived from it, such as hydroxyl radical, may be the molecular mediators of CF activity.
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PMID:The pathogenesis of systemic lupus erythematosus. 628 85

This article gives a synopsis of the inflammatory reactions as well as its mediators under special consideration of the efferent part of the reaction. There is no doubt that histamine, complement, and the kinin system play an essential role; arachidonic acid (eicosatetraenic acid) and its metabolites, however, have gained comparable significance: prostaglandines, prostacyclines, and thromboxanes as metabolites of the cyclo-oxygenase, the leucotrienes SRS-A (slow reacting substances of anaphylaxis) and ECF (eosinophilic chemotactic factor) mediated via lipoxygenase. Moreover, oxygen and its metabolites hydrogen peroxide (H2O2), peroxide radicals (O-2), and hydroxyl radicals (.OH) as well as activated oxygen (singulett oxygen (1O2) play an important part with all aerobic living organisms. Inborn enzyme deficiency of the oxygen metabolism such as NADPH oxidase or cytochrome b-245 deficiency lead to chronic septic granulomatosis. The disease is characterized by reduced resistence against infections, decreased phagocytosis, insufficient killing of bacteria by leucocytes, and diminished oxygen burst. Thus the underlying enzyme deficiency leads to reduced formation of peroxide radicals frequently causing infections with septic complications. On the other hand, increased formation or reduced degradation of peroxide radicals may result in pathological reactions like chromosomal alterations, lipidperoxidation or oxidation of sulph-hydryl groups. The fact that increased peroxide radical formation may cause inflammation or chromosomal aberration is of importance with regard to the pathogenesis of several chronic inflammatory diseases of unknown etiology, such as systemic scleroderma or lupus erythematodes. The enzyme superoxide dismutase (SOD) converts peroxide radicals (O-2) into hydrogen peroxide (H2O2) which can be inactivated by catalase or peroxidase. Consequently, treatment with SOD may have an effective influence on chronic inflammatory dermatoses of unknown pathogenesis.
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PMID:[Biochemical aspects of the inflammatory reaction - with special reference to oxygen]. 666 95

The nature and frequency of pulmonary involvement in systemic lupus erythematosus (SLE) is controversial. We reviewed the clinical and pathologic features of 120 patients with SLE described in autopsy records at The Johns Hopkins Hospital to determine the pulmonary parenchymal changes that could be attributed directly to SLE. Each case was reviewed to determine the extent of extrapulmonic SLE and possible alternative explanations for the observed lung pathology. Moderate or severe pulmonary parenchymal alterations that were attributed to SLE were found in 22 patients (18 percent). Five patients with interstitial fibrosis, two with pulmonary vasculitis, and one with pulmonary hematoxylin bodies were attributable only to SLE, as were 11 of 15 (73 percent) patients with interstitial pneumonitis. Alternative explanations for findings previously attributed to SLE included congestive heart failure, renal failure, infection, aspiration, oxygen toxicity and increased intracranial pressure. Alveolar hemorrhage, thought to be a feature of acute lupus pneumonitis, was unexplained in only two of 29 (7 percent) patients, alveolar wall necrosis was unexplained in one of seven (14 percent) and edema was unexplained in three of 70 (4 percent). Hyaline membranes, present in four patients, were always explained. Pleuritis and pleural effusions were attributed to SLE in 22 of 36 (61 percent) and three of 28 (11 percent) patients, respectively. The findings suggest that many nonspecific pulmonary lesions previously attributed to SLE, such as alveolar hemorrhage, alveolar wall necrosis, edema and hyaline membranes, are probably secondary to intercurrent infection, congestive heart failure, renal failure or oxygen toxicity.
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PMID:The lung in systemic lupus erythematosus. Analysis of the pathologic changes in 120 patients. 730 51

Chromosome instability is observed in patients with collagen disease. It is due to the presence of a chromosome-breaking agent in the serum which also induces chromosome breaks and rearrangements in blood cultures from healthy subjects. It is not possible to say at present whether this breakage factor is identical to that in patients with progressive systemic sclerosis, lupus erythematosus or rheumatoid arthritis. In all three diseases the agent is a substance with a low molecular weight between 1000 and 10,000 daltons. Since the enzyme superoxide dismutase has an anticlastogenic protective effect, the action of the agent on chromosomes is probably an indirect one, namely by generation of oxygen-dependent free radicals such as O2- x and OH.
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PMID:Chromosomal instability in collagen disease. 742 3

Hyperbaric oxygen has been used in patients with rheumatic disease for many years without reports of untoward or unusual complications for a variety of non-rheumatic indications. Recent evidence that hyperbaric oxygen inhibits the actions of certain cytokines, acts as an immune modulator and may help cognitive dysfunction has resulted in a re-examination of its potential role in rheumatic diseases. A case report of a lupus/scleroderma crossover patient is presented whose cognitive dysfunction improved after hyperbaric oxygen therapy. The history of hyperbaric oxygen and its physiology are related, along with a focused review of its effects on the immune and central nervous systems. Areas which might warrant further consideration by rheumatologists are outlined, as well as areas of concern.
Lupus 1995 Jun
PMID:Use of hyperbaric oxygen in rheumatic diseases: case report and critical analysis. 864 34

Although sunlight is known to induce generalized manifestation in systemic lupus erythematosus (SLE) patients, its underlying mechanism remains obscure. In the present study we have investigated whether UVA (320-400 nm), the most predominant UV component in solar radiation, induces enhanced accumulation of reactive oxygen species in murine SLE-derived cells (MRL/l) in comparison to normal cells (Balb/c), as measured by oxygen (O2) consumption, by means of a Clark-type electrode. Our data show enhanced O2 consumption by MRL/1 cells (which correlates with the formation of reactive oxygen species), accompanied by decreased viability, in comparison to irradiated normal cells. This finding suggests that increased accumulation of reactive oxygen species contributes to the enhanced photosensitivity observed in SLE patients.
Lupus 1994 Apr
PMID:Solar ultraviolet radiation induces enhanced accumulation of oxygen radicals in murine SLE-derived splenocytes in vitro. 792 Jun 8

Enrichment of diet with omega-3 lipid rich-menhaden fish oil (FO) when fed ad libitum to autoimmune lupus-prone NZB/NZW F1 (B/W) female mice delayed the onset and slowed progression of renal disease while significantly extending life-span compared to omega-6 lipid rich-corn oil (CO)-fed mice. Northern blot analysis of kidneys from FO-fed mice revealed no detectable levels of IL-1 beta, IL-6 and TNF alpha mRNA contrasted to levels that were easily detected in CO-fed mice. In contrast to the cytokines, FO-fed mice showed higher renal levels of the antioxidant enzymes-catalase, glutathione peroxidase (GSH-Px), superoxide dismutase (SOD)-mRNAs compared to CO-fed mice. The results suggest that dietary supplementation with FO, as compared to CO, inhibits the production of pro-inflammatory cytokines and ameliorates immune-complex-mediated kidney injury possibly by enhancing the ability of cells to dispose of harmful reactive oxygen intermediates.
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PMID:Decreased pro-inflammatory cytokines and increased antioxidant enzyme gene expression by omega-3 lipids in murine lupus nephritis. 817 24


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