Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0004153 (atherosclerosis)
 77,401 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Men with ankylosing spondylitis (AS) and females with systemic lupus erythematosus (SLE) were found to have low total serum lipid concentrations similar to results previously obtained in patients with rheumatoid arthritis (RA). In AS men total serum TG was about 50% of control values and in AS men and SLE women total serum cholesterol was 78% of control values but close to corresponding RA concentrations. This was explained mainly by low LDL concentrations. There was a marked difference between RA patients and AS and SLE patients in that the two latter groups had normal HDL cholesterol concentrations whereas in RA patients the HDL cholesterol concentration was only 70% of control values. Thus in spite of similar and low total serum lipid concentrations, differences in lipoprotein composition were found in the three different rheumatic diseases, underlining the importance of lipoprotein analyses in the study of dyslipoproteinaemia.
Atherosclerosis 1978 Sep
PMID:Further studies on serum lipoproteins in connective tissue diseases. 21 90

A vasomotor (nitritoid) reaction occurred following an initial injection of gold sodium thiomalate (GST; Myochrysine) in a 69-year-old man with rheumatoid arthritis (RA). An acute anterior wall myocardial infarction, documented by serial electrocardiographic and serum enzyme changes, developed immediately thereafter. A second patient, a 49-year-old man with RA and a history of GST-associated vasomotor reactions, was monitored clinically and electrocardiographically after GST administration. Sinus tachycardia developed and peripheral blood pressure fell within 2 minutes of injection, simultaneous with the onset of vasomotor symptoms. Vasomotor reactions from GST may compromise myocardial perfusion by their action on arteriolar smooth muscle, and thus result in peripheral vasodilatation, or they may act by adrenergic discharge initiated by such a reaction, and thus increase myocardial work and oxygen demand. Aurothioglucose (Solganal), rarely produces vasomotor reactions, and may be preferred to GST in elderly RA patients with concomitant cardiovascular disease or atherosclerosis.
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PMID:Acute myocardial infarction following gold sodium thiomalate induced vasomotor (nitritoid) reaction. 40 17

Dietary supplementation with n-3 polyunsaturated fatty acids (PUFA) is regarded as beneficial for the prevention and treatment of atherosclerosis and thrombosis and chronic inflammatory diseases like rheumatoid arthritis and psoriasis. It may be possible to treat some acute diseases like acute myocardial infarction or acute rejection of grafted organs if it is possible to make n-3 PUFA take effect quickly (in hours instead of days). Three sets of experiments were done. In Experiment 1, emulsion of trieicosapentaenoyl-glycerol (EPA-TG) and tridocosahexaenoyl-glycerol was infused through rabbit ear veins, and the leukotriene B4/B5 production from polymorphonuclear leukocytes was measured at different time points by high-performance liquid chromatography. In Experiment 2, delayed type hypersensitivity (DTH) of mice was measured with sheep red blood cells as an antigen. Pure n-3 PUFA emulsions or a control solution were infused through tail veins just before the second challenge of the antigen. DTH was measured 24 hr after the second challenge. In Experiment 3, human natural killer cell activity was measured using K562 target cells before and after the infusion of pure EPA-TG emulsion to an antecubital vein. Leukotriene B4 production by rabbit polymorphonuclear leukocytes was depressed by 40% by EPA-TG infusion. DTH was suppressed almost completely by n-3 PUFA infusion. Natural killer cell activity was suppressed almost completely by EPA-TG infusion in 8 hr. DTH, natural killer cell activity, and leukotriene B4 production are probably related to acute rejection of grafted organs.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Intravenous infusion of n-3 polyunsaturated fatty acids. 131 67

The infiltration and activation of monocytes is a hallmark of chronic inflammation, including that associated with a variety of disease states such as rheumatoid arthritis, atherosclerosis, and various autoimmune conditions. Recently, a family of small molecular mass proteins has been described which appear to have inflammatory properties, including chemoattractant effects on monocytes. We report here on the molecular cloning, characterization, and functional expression of mu RANTES, a new murine member of this family. mu RANTES expressed in a mammalian expression system is an approximately 8-kDa protein exhibiting immune cross-reactivity with a rabbit polyclonal antiserum generated against human RANTES. Boyden chamber chemotaxis experiments reveal some lack of species specificity in monocyte chemoattractant potential, as recombinant mu RANTES attracts human monocytes in a dose-dependent fashion in vitro. mu RANTES and its human homolog share approximately 85% amino acid identity, a higher level of conservation than that seen with any other species homologs in this cytokine family, and second only to transforming growth factor-beta among reported immune cytokines.
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PMID:Molecular cloning and expression of the murine RANTES cytokine: structural and functional conservation between mouse and man. 137 60

Molecular graphics and molecular mechanics techniques have been used to study the mode of ligand binding and mechanism of action of the enzyme phospholipase A2. A substrate-enzyme complex was constructed based on the crystal structure of the apoenzyme. The complex was minimized to relieve initial strain, and the structural and energetic features of the resultant complex analyzed in detail, at the molecular and residue level. The minimized complex was then used as a basis for examining the action of the enzyme on modified substrates, binding of inhibitors to the enzyme, and possible reaction intermediate complexes. The model is compatible with the suggested mechanism of hydrolysis and with experimental data about stereoselectivity, efficiency of hydrolysis of modified substrates, and inhibitor potency. In conclusion, the model can be used as a tool in evaluating new ligands as possible substrates and in the rational design of inhibitors, for the therapeutic treatment of diseases such as rheumatoid arthritis, atherosclerosis, and asthma.
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PMID:Modeling of substrate and inhibitor binding to phospholipase A2. 140 62

The concept of autocrine secretion, its subsequent modifications, its application for understanding pathogenesis of disease, and its potential for developing new approaches to prevention and treatment are reviewed. Peptide growth factors (cytokines) act as local autocrine and paracrine mediators of tissue homeostasis. Many diseases, including cancer, atherosclerosis, rheumatoid arthritis, and other fibrotic diseases characterized by chronic inflammation, are associated with aberrant expression and cellular coordination of the homeostatic action of these regulatory molecules. Modern biotechnology and pharmacology offer unique opportunities for the therapeutic prevention and treatment of these molecular and cellular lesions, using either cytokines or other agents that modify their synthesis and activity.
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PMID:Autocrine secretion--10 years later. 150 33

Vascular disorders comprise a wide range of diverse disease entities. Correspondingly, vessels, and even more so the endothelial which line them, show a remarkable extent of heterogeneous differentiation, e.g. between the blood vascular and lymphatic systems, along the length of the vascular trees, and in the microvascular beds of various organs. The most important morphologic criterion to discriminate between endothelia is continuity (continuous endothelial cell layer and well-formed basement membrane) versus discontinuity (intra- or intercellular gaps and/or reduced or missing basement membrane). Most blood vascular endothelia are of the continuous type, while most sinusoidal and lymphatic endothelia are discontinuous by these criteria. Antigen expression corroborates these morphologic data in that CD31, CD34, and 1F10 antigen are exclusively expressed in continuous endothelia, while MS-1 antigen is preferentially expressed in non-continuous sinusoidal endothelia. In contrast, no specific marker has as yet been described for lymphatic endothelia. Endothelial heterogeneity substantially contributes to the pathogenesis of vascular disorders. For example, in patients with acquired immunodeficiency syndrome the same infectious agent may cause either bacillary angiomatosis (a lobular capillary proliferation) or peliosis (sinusoidal dilatation, endothelial denudation, and development of blood-filled cysts) depending on whether the affected organs have predominantly continuous endothelia or noncontinuous sinusoidal endothelia. Moreover, in Kaposi's sarcoma, it is still an open question of whether the lesion is derived from blood vascular or lymphatic endothelia (Kaposi's sarcoma cells in situ do not express the von Willebrand factor+, PAL-E+, 1F10+ phenotype of mature, resting blood vascular endothelia). It is also unresolved how endothelia of either type may be differentially induced to dedifferentiate and how they are recruited into the lesion. Clearly, knowledge about endothelial heterogeneity is still too incomplete to identify the actual mechanisms and molecules that govern the pathogenesis of vascular disorders (including still others than those mentioned here such as atherosclerosis, diabetic angiopathy, and rheumatoid arthritis) affecting distinct endothelia. Further efforts in antigenic phenotyping and in cell and molecular biology of heterogeneously differentiated endothelia should be made to improve this state of affairs.
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PMID:Endothelial heterogeneity and the acquired immunodeficiency syndrome: a paradigm for the pathogenesis of vascular disorders. 160 Mar 45

Oxidative stress is strongly implicated in a number of diseases, such as rheumatoid arthritis, inflammatory bowel disorders, and atherosclerosis, and its emerging as one of the most important causative agents of mutagenesis, tumorigenesis, and aging. Recent progress on the genetics and molecular biology of the cellular responses to oxidative stress, primarily in Escherichia coli and Salmonella typhimurium, is summarized. Bacteria respond to oxidative stress by invoking two distinct stress responses, the peroxide stimulon and the superoxide stimulon, depending on whether the stress is mediated by peroxides or the superoxide anion. The two stimulons each contain a set of more than 30 genes. The expression of a subset of genes in each stimulon is under the control of a positive regulatory element; these genes constitute the OxyR and SoxRS regulons. The schemes of regulation of the two regulons by their respective regulators are reviewed in detail, and the overlaps of these regulons with other stress responses such as the heat shock and SOS responses are discussed. The products of Oxy-R- and SoxRS-regulated genes, such as catalases and superoxide dismutases, are involved in the prevention of oxidative damage, whereas others, such as endonuclease IV, play a role in the repair of oxidative damage. The potential roles of these and other gene products in the defense against oxidative damage in DNA, proteins, and membranes are discussed in detail. A brief discussion of the similarities and differences between oxidative stress responses in bacteria and eukaryotic organisms concludes this review.
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PMID:Oxidative stress responses in Escherichia coli and Salmonella typhimurium. 177 27

Hepatic artery aneurysm is a rare vascular lesion that accounts for nearly 10% of hemobilia cases. Its etiology is most often atherosclerosis, trauma, or infection. Autoaggressive disorders are rarely associated with hepatic artery aneurysm as is thyroid dysfunction. Presented here is a case of hemobilia secondary to a rupture of one of multiple aneurysms of both right and left hepatic arteries in a women with a history of rheumatoid arthritis, hypothyroidism, and hypertension. Surgical intervention has been the rule in the past. Selective transcatheter embolization has gained clinical application in recent years, especially in the treatment of intrahepatic aneurysms. Its efficacy and safety are demonstrated by this case.
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PMID:Hemobilia in a patient with multiple hepatic artery aneurysms: a case report and review of the literature. 264 98

This review on the risks and benefits of oral contraceptives clarifies the risks and misperceptions, and discusses 10 potential health benefits. In the U.S. where maternal mortality is about 20.6/100,000, the risk of death from pills ranges from 1.8 for nonsmokers to 6.5 for smokers. It is likely that most of the small existing mortality risk of pill use is due to thromboembolism. Atherosclerosis, the major cause of death for U.S. women, may be reduced by the pill. It is still controversial whether pills increase risk of hepatocellular carcinoma and malignant melanoma; they protect against endometrial cancer (the 3rd greatest cancer killer) and ovarian (the 4th) cancer; they may increase risk slightly in some subgroups for breast and cervical cancer, although data are conflicting. Pills also protect against ectopic pregnancy, benign breast disease, pelvic inflammatory disease, ovarian cysts, iron deficiency anemia and possibly uterine fibroids and osteoporosis. It is no longer held that orals protect against toxic shock syndrome or rheumatoid arthritis. It is estimated that oral contraceptives avert 50,000 hospital admissions per year in the U.S.
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PMID:The health effects of oral contraceptives: misperceptions, controversies, and continuing good news. 266 76


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