Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Maternal serum levels of a pregnancy specific beta-1 glycoprotein (SP-1) were measured by radial-immunodiffusion in 369 normal pregnancies. Mean levels rose progressively to approximately 200 mg/l at 36 weeks of gestation followed by a plateau and a fall at term. The 95% confidence limits were established for SP-1 logarithmic correction of the positively skewed raw data and certain theoretical and practical advantages were demonstrated in the use of SP-1 compared with human placental lactogen (HPL) measurement in the assessment of fetal-placental growth and function. In a preliminary study of abnormal pregnancy states it was found that maternal serum SP-1 assay may aid in the early detection of retarded intrauterine growth, and that it provides a better monitoring system than HPL in this condition. SP-1 levles were normal in pregnancies complicated by hypertension without retarded intrauterine growth.
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PMID:Pregnancy-specific beta-1 glycoprotein (SP-1) in normal and abnormal pregnancy. 28 80

The relationship between hypertension-inducing potency and renin content of kidney extract was analyzed in rats using Sephadex G-100, CM-Sephadex C-50, DEAE-Cellulose or Concanavalin A-Sepharose column chromatography. Hypertension-inducing potency of each fraction obtained was evaluated in the basis of the final blood pressure level attained by repeated injections into the test animals for 10 days. Hypertension-inducing potency was found mainly in the renin-contaning fractions. And it seems reasonable to conclude that renin is implicated in the pathogenesis of hypertension produced by kidney extract. However, there were significant discrepancies between hypertension-inducing potency and renin content of subdivided fractions of these renin-containing eluates. Possible explantations for the discrepancies disclosed--including the possibility of the involvement of an unknown substance(s)--have been discussed. In addition, it was suggested from the results of Concanavalin A-Sepharose chromatography that rat renal renin has a glycoprotein nature.
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PMID:Column chromatographic analysis of relationship between hypertension-inducing potency and renin content of kidney extract. 126 30

The extracellular matrix glycoprotein tenascin is associated with remodeling events in many embryonic and pathologic tissues. The expression of tenascin has been investigated by immunohistochemistry in blood vessels of Wistar-Kyoto (normotensive) and spontaneously hypertensive rats. Weak tenascin staining was present throughout the tunica media of large and small arteries from normotensive animals; strong staining was only detectable at branching sites. In arteries from hypertensive animals, foci of strong tenascin staining were scattered throughout the tunica media. The expression of tenascin mRNA and protein by rat aortic smooth muscle cells cultured in serum-free medium was induced by the vasoconstrictor peptide angiotensin II. Transforming growth factor-beta and platelet-derived growth factor also stimulated tenascin mRNA expression. Vascular smooth muscle cells attached specifically to a substratum of tenascin, but remained rounded. Thus, increased focal tenascin expression by vascular smooth muscle cells is associated with hypertension, and may mediate angiotensin II-induced changes in vascular structure in hypertension.
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PMID:Expression of tenascin by vascular smooth muscle cells. Alterations in hypertensive rats and stimulation by angiotensin II. 767 55

A role for angiotensin II (Ang II) in the pathogenesis of hypertension and atherosclerosis was studied using cultured vascular smooth muscle cells from spontaneously hypertensive rats. Chronic exposure of vascular smooth muscle cells, cultured in the presence of 1% plasma-derived serum, to Ang II resulted in a dose-dependent stimulation in growth and incorporation of radiolabeled matrix precursors into extracellular matrix-associated glycoconjugate material. The hormone also stimulated the incorporation of [3H]glycine into extracellular matrix glycoproteins and proteoglycans synthesized by cultures rendered quiescent by maintenance on serum-free medium for 48 h prior to exposure to Ang II. This was negated in the presence of saralasin. In quiescent cultures, a single exposure to angiotensin induced a rapid induction of mRNA coding for the extracellular matrix glycoprotein thrombospondin. Similar results were obtained with cells maintained on medium containing 1% plasma-derived serum; however, the levels of induction were reduced by this procedure. This study demonstrated that Ang II was capable of stimulating both growth and matrix elaboration by cultured vascular smooth muscle cells. These observations are indicative of a pathophysiological role for the vasoconstrictor peptide, which may contribute significantly to the development of hypertension.
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PMID:Modulation of extracellular matrix by angiotensin II: stimulated glycoconjugate synthesis and growth in vascular smooth muscle cells. 170 26

Increased glycosylation of various proteins in diabetic patients has been reported by many authors. In the present study, the extent of non-enzymatic glycosylation in diabetic patients with or without chronic complications was investigated. Eighty-five diabetic patients were studied, 20 were without any clinical evidence of chronic complications while the remainder were suffering from cataract (n = 18), retinopathy (n = 16), peripheral neuropathy (n = 16) and cardiovascular complications like angina pectoris, myocardial infarction and hypertension (n = 15). All patients were selected on clinical grounds. Fifteen apparently healthy subjects of similar age and weight were studied as control subjects. Fasting plasma glucose was increased in all diabetic patients and correlated significantly with glycosylated hemoglobin, glycosylated plasma protein and serum fructosamine concentrations. There was no significant difference between diabetic patients with or without chronic complications in the levels of fasting plasma glucose, glycosylated plasma proteins, glycosylated hemoglobin, serum fructosamine, mucoprotein, hexosamine, sialic acid and fucose. Alpha-2 globulin fraction was increased in both uncomplicated and complicated diabetic patients and albumin was found to be decreased in patients with cataract, peripheral neuropathy and cardiovascular diseases. Alpha-1 and beta globulins were significantly decreased in patients with cardiovascular diseases and retinopathy respectively while gamma globulin was increased in retinopathy patients. In uncomplicated diabetic patients alpha-1 glycoprotein was decreased and gamma glycoprotein was increased. In diabetic patients with retinopathy, alpha-1 glycoprotein was elevated significantly while beta glycoprotein was decreased.
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PMID:Changes in glycosylated proteins in long-term complications of diabetes mellitus. 216 68

Erythropoietin is a glycoprotein hormone of primarily renal origin that promotes the proliferation and differentiation of erythrocyte precursors. Technological advances have resulted in the production of recombinant hormone suitable for therapeutic use and have permitted significant progress in the characterization of the physiologic and pathologic processes involved in endogenous erythropoietin production. In situ hybridization studies have shown that erythropoietin production in the hypoxic kidney occurs primarily in peritubular cells, most likely endothelial cells. In renal carcinoma associated with polycythemia, however, erythropoietin mRNA has been detected in the tumor cells, which are tubular in origin. New information regarding the biochemistry of the erythropoietin receptor has been gleaned subsequent to the cloning of the gene encoding the receptor; however, much remains to be learned about the interaction of the hormone with its target cells. With regard to clinical experience, recombinant erythropoietin has been shown to correct the anemia associated with chronic renal failure in patients requiring dialysis, having a significant beneficial effect on the overall physical and psychological state of the patient; the major adverse effect of such treatment is hypertension. The role of recombinant erythropoietin in predialysis patients, patients with anemias of other origin, and other clinical settings is currently being evaluated.
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PMID:Erythropoietin: physiology and clinical experience. 219 61

A cDNA clone isolated from a lambda gt11 expression library of teratocarcinoma OTT6050 specifies for a glycoprotein with a molecular weight of about 44,000. The new glycoprotein was termed heparin binding protein-44 (HBP-44), since it was absorbed to a heparin-agarose column and was eluted from it by a buffer containing 1.5 M NaCl. HBP-44 mRNA was intensely expressed in PYS-2 parietal endoderm cells and in the kidney, and the RNA level increased about 10-fold during differentiation of F9 embryonal carcinoma cells to parietal endoderm cells. From the cDNA sequence, HBP-44 was concluded to be rich in charged amino acids, and large segments of the protein appeared to form alpha-helixes. The protein was considered to be anchored to the membrane by a cluster of hydrophobic amino acids present in the N-terminal region. Indeed, the N-terminal sequence of HBP-44 was homologous to asialoglycoprotein receptor, which is anchored to the membrane by the N-terminal region. Furthermore, a portion of the N-terminal region of HBP-44 was homologous to the leucine zipper domain. Except for the N-terminal region, HBP-44 had over-all homology with structural proteins such as myosin heavy chain. We propose that HBP-44 is extruded from plasma membranes and interacts with heparin and related molecules and that it is involved in the interactions of plasma membranes with basement membranes.
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PMID:A heparin binding protein whose expression increases during differentiation of embryonal carcinoma cells to parietal endoderm cells: cDNA cloning and sequence analysis. 222 28

Laminin, a noncollagenous glycoprotein, has been identified as a component of basement membranes. It serves as a multifunctional adhesion protein. Immunoreactive laminin levels determined by a radioimmunoassay were found to increase throughout gestation, obviously due to growth of the placenta, an organ rich in basement membranes. In this study of 92 pregnant women in the third trimester we compared the serum laminin levels of 69 women with an uneventful course of pregnancy to the levels of 23 women with symptoms of pregnancy-induced hypertension. Laminin concentrations were 2.6 U/ml in pregnant women with hypertension and proteinuria, which was significantly higher than in healthy pregnant women (2.0 U/ml). We supposed that immunologic reactions that damage the kidney account for an increase of laminin concentrations in these women. Therefore we suggest that measurements of serum laminin concentrations may serve as a potential marker of renal damage.
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PMID:Serum laminin in pregnancy-induced hypertension--a marker for renal involvement? 224 53

A variety of tubular marker proteins, as compared to healthy controls, are excreted at an increased rate in the urine of patients with renal damage. Beside cytoplasmic glutathione-S-transferase and lysosomal beta-N-acetyl-glucosaminidase (beta-NAG) the majority of kidney-related urine proteins derives from membrane surface components of the most vulnerable proximal tubule epithelia, among them ala-(leu-gly)-aminopeptidase, gamma-glutamyl transpeptidase (GGT), the tubular portion of angiotensinase A, the major brush border glycoprotein 'SGP-240' and adenosine-deaminase-binding protein. Urinary tissue proteins, e.g. brush border (BB) microvilli, are immunologically identical with those antigens prepared from cell membranes of the human kidney itself. BB antigens are shed into the urine of patients with glomerulonephritis, interstitial nephritis, systemic diseases, e.g. systemic lupus erythematosus (SLE), diabetes mellitus and multiple myeloma, arterial hypertension, infectious diseases (malaria, AIDS) and after operations, renal grafting and administration of X-ray contrast media, aminoglycosides or certain cytostatics (cis-platinum). Tissue proteinuria of tubular proteins is determined by enzyme-kinetic or quantitative immunological assays applying either poly- or monoclonal antikidney antibodies. Clinical, ultrastructural and histochemical studies support the idea that both 'soluble' and high-molecular-weight membrane particles (vacuolar blebs, greater than 10(6) dalton) as well as microfilamental components of the epithelial cytoskeleton contribute to tubular 'histuria' which appears as a sensitive parameter in monitoring tubular damage under clinical conditions at a very early phase.
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PMID:Urinary proteins of tubular origin: basic immunochemical and clinical aspects. 225 76

CCB are a diverse group of drugs that bind to specific glycoprotein receptors associated with the cell membrane that are most likely identical to the voltage-sensitive calcium channel. By inhibiting the influx of calcium into myocardial, pacemaker, and conducting tissues and vascular smooth muscle, these agents modify excitation-contraction coupling in muscle and electrical impulse transmission in the heart. The vasodilating and electrophysiologic actions of these drugs have been harnessed for the treatment of coronary vasospasm, angina pectoris, and supraventricular arrhythmias. They also have great potential for the treatment of hypertension, cerebrovascular disorders, and Raynaud's phenomenon. Their utility in hypertrophic cardiomyopathy, congestive heart failure, myocardial preservation, and primary pulmonary hypertension has not been convincingly established. Future second-generation CCB may offer greater selectivity, improved side effect profiles, and an even wider range of actions.
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PMID:Calcium channel blocking drugs. Part II: Clinical applications. 241 54


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