Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0085580 (essential hypertension)
 14,686 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The total activity of N-acetyl-beta-D-glucosaminidase (NAG) and its isoenzymes A and B was determined in the urine of 18 children aged 9-18 years with essential hypertension and 21 with nephrogenic hypertension. The results were compared with those in a control group of 30 healthy children. The obtained results show that in children with stabilized hypertension (above the 95 centile) of essential type the proportion (above the 95 centile) of essential type the proportion of urinary isoenzymes are changes, with higher activity of the B isoenzyme. On the other hand, in children with nephrogenic hypertension the total activity and the activity of the B isoenzyme are increased. After reduction of blood pressure following hypotensive treatment (below the 90th centile) the activity of NAG and its isoenzymes was again normal in essential hypertension and was much reduced in nephrogenic hypertension. The study demonstrated that hypertension leads to transient damage to the proximal tubules which is reversed by effective hypotensive treatment.
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PMID:[Evaluation of N-acetyl-beta-D-glucosaminidase (NAG) and its isoenzyme activities in the urine of children with primary and secondary hypertension]. 146 66

The therapeutic effect of long-term enalapril administration was studied in 20 patients with severe essential hypertension (EH), resistant to intensive therapy with a combination of 3 or 4 antihypertensive drugs. Addition of enalapril (Renitec MSD from 5 to 40 mg/day) to the previous therapy allowed to maintain blood pressure within limits not exceeding 150/95 mmHg during a 12-month study in more than 80% of previously resistant patients. Left ventricular hypertrophy regressed in all patients and dilatation of the left ventricle seen in 4 patients disappeared during enalapril treatment. Serum sodium creatinine did not change significantly. Serum potassium increased slightly but remained within the normal range. Proteinuria had a tendency to diminish and N-acetyl-beta-D-glucosaminidase activity in the urine dropped within normal limits. Based on their results, the authors conclude that enalapril is suitable for the long-term treatment of patients with severe EH, resistant to intensive antihypertensive therapy, with minimal side effects, good tolerance and a tendency for amelioration of cardiac and renal function.
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PMID:The effect of long-term treatment by the angiotensin I-converting enzyme inhibitor enalapril on renal function and left ventricular hypertrophy in severe essential hypertension. 198 Oct 38

To examine the relationship between the urinary levels of alanine aminopeptidase (AAP) or N-acetyl-beta-D-glucosaminidase (NAG) and the advance of essential hypertension, we measured the urinary levels of these enzymes in 20 normotensive controls, 8 subjects with borderline hypertension and 40 subjects with WHO stage I and stage II essential hypertension. The urinary level of NAG in stage II hypertensives was higher than that in the normotensives, and borderline or stage I hypertensives (p less than 0.01). Systolic blood pressure and the urinary level of NAG was positively correlated in hypertensives (rs = 0.43, p less than 0.01). The urinary level of NAG was correlated inversely with renal blood flow (rs = -0.61, p less than 0.01). The urinary level of AAP in stage II hypertensives was also higher than that in the normotensives (p less than 0.01) or stage I hypertension (p less than 0.01), but the urinary AAP level was not significantly correlated with systolic blood pressure or renal blood flow in hypertension.
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PMID:Significance of the measurement of urinary alanine aminopeptidase and N-acetyl-beta-D-glucosaminidase activity in evaluating patients with essential hypertension. 286 56

Ambulatory blood pressure (ABP) correlates better than office blood pressure with hypertensive changes in the heart and vasculature. Using the 24-hour urinary excretions of albumin and N-acetyl-beta-D-glucosaminidase (NAG) as markers, we examined the relationship between office and ABP and target-organ changes in the kidney in 42 untreated patients with essential hypertension. Mean urinary albumin excretion was 23.2 +/- 34.3 mg/day and mean urinary NAG excretion was 45.1 +/- 22.9 nmol/hr/mg creatinine. Urinary albumin excretion was positively correlated with both office and mean 24-hour systolic blood pressure (r = 0.31, P less than 0.05; and r = 0.44, P less than 0.01, respectively). Urinary NAG excretion was positively correlated with 24-hour ambulatory systolic, diastolic, and mean blood pressure (r = 0.32, P less than 0.05; r = 0.32, P less than 0.05; and r = 0.39, P less than 0.05, respectively), but not with office blood pressure. Thus, urinary albumin and NAG excretions are positively correlated with blood pressure and may be useful markers of renal involvement in patients with essential hypertension. Additionally, ABP may be more reliable than office blood pressure in identifying those patients at risk for hypertensive target-organ changes in the kidney.
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PMID:Correlation of office and ambulatory blood pressure measurements with urinary albumin and N-acetyl-beta-D-glucosaminidase excretions in essential hypertension. 341 83

Hypertension in the malignant phase is all too commonly associated with impairment of renal function, which may be gross and dominate the clinical picture. In contrast, the vast majority of patients with essential hypertension show no evidence of impairment of renal function, despite the well recognized morbid anatomical changes of Renal haemodynamic changes can be detected in some two-thirds of hypertensive subjects with a variable decrease in renal blood flow and increase in filtration fraction. This pattern could be considered a potential mechanism for hyperfiltration damage to glomeruli, but there is no direct evidence. Estimates of renal blood flow and glomerular filtration rate are not sensitive indices of early renal damage of hypertensive origin. Much more sensitive but relatively unexplored is the measurement of micro-albuminuria in hypertensive patients. There is some evidence that the degree of micro-albuminuria may correlate inversely with the control of arterial pressure in essential hypertension. These observations and the suggestion that increased urinary N-acetyl-beta-D-glucosaminidase may be a sensitive index of renal tubular damage need further confirmation.
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PMID:Early assessment of organ involvement in hypertension: renal assessment. 386 41

Compared to values obtained in healthy normotensive control subjects, serum activity of the lysosomal enzyme N-acetyl-beta-D-glucosaminidase (NAG) was found to be elevated in patients with untreated or treated essential hypertension and in patients with renovascular hypertension. Increased NAG activity in hypertension could not be ascribed to tissue necrosis because the serum levels of several commonly measured cytosolic enzymes were within normal limits. The kidney is a likely but unproven source of the enzyme elevation in hypertension.
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PMID:Increased serum N-acetyl-beta-D-glucosaminidase activity in human hypertension. 707 94

In order to evaluate tubular damage in diabetic patients, the activity of renal proximal tubule derived enzymes excreted in 24-hour urine were recorded in 5 groups as follows: (i) 48 noninsulin-independent diabetic patients with normal renal function and a urinary albumin excretion rate within the normal range; (ii) 45 noninsulin-dependent diabetic patients with normal renal function and a high urinary albumin level; (iii) 26 noninsulin-dependent diabetic patients with renal failure; (iv) 40 patients with essential hypertension and normal renal function, and (v) 48 normal control subjects. Regardless of whether cases were noninsulin-dependent diabetics with normal or high urinary albumin excretion rate or cases with renal dysfunction, urinary dipeptidyl aminopeptidase IV and N-acetyl-beta-D-glucosaminidase excretions were significantly higher than in healthy subjects, and urinary gamma-glutamyl transpeptidase excretion was significantly lower than in healthy subjects. No significant changes in urinary enzyme excretions showed specific variations in the essential hypertensive patients. These results suggest that there is tubular damage in the early stages of noninsulin-dependent diabetic patients with normal renal function and normal urinary albumin excretion rate. Detection of urinary excretion of dipeptidyl aminopeptidase IV, N-acetyl-beta-D-glucosaminidase and gamma-glutamyl transpeptidase may be especially useful for the early diagnosis of diabetic nephropathy.
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PMID:Diagnostic significance of urinary enzymes for diabetes mellitus and hypertension. 858 4

Increased urinary activity of N-acetyl-beta-D-glucosaminidase (NAG) has been reported in many clinical conditions, including essential hypertension. Since hypertension is increasingly recognized as beginning in childhood, we hypothesized that urinary NAG changes with increasing blood pressure may start early in life and may also be the evidence of the existence of early hypertensive disease. We analyzed the urinary NAG changes in 980 young adults, ages between 18 to 32, in relation to age, race, sex, and systolic and diastolic blood pressure. We observed that black women had the highest level of NAG, with or without adjustment for creatinine. With aging, urinary NAG significantly increased in men. As blood pressure increased, urinary NAG excretion appeared to increase, and this was more apparent in black women (P < .05). Significant correlations between NAG excretion and systolic (r = 0.12, P = .04) and diastolic (r = 0.18, P = .003) blood pressures existed in the oldest age group, 28 to 32 years old. These findings show that a significant association between urinary NAG and blood pressure exists in normal young adults and changes in urinary NAG may be evidence of early hypertensive disease.
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PMID:Urinary N-acetyl-beta-D-glucosaminidase changes in relation to age, sex, race, and diastolic and systolic blood pressure in a young adult biracial population. The Bogalusa Heart Study. 892 65

The essential arterial hypertension is the second (after diabetes mellitus) cause of chronic renal failure which means a great social and economic burden to the society. It is well known that hypertension is a metabolic syndrome resulting in tissue injury. We tried to investigate the possible influence of some metabolic disturbances on renal function in nontreated essential hypertension. We have compared 25 patients with nontreated essential hypertension (11 women, 14 men) with 14 healthy volunteers (7 women, 7 men) matched for age. The patients' group was characterized by significantly higher urine excretion of NAG (N-acetyl-beta-D-glucosaminidase) (2.75 +/- 1.69 vs 1.82 +/- 1.46 p < 0.05) and a tendency to significantly higher urine fractional sodium excretion without significant difference in albumin excretion. These findings suggest that the tubular damage is present. We noticed the negative linear correlation between mean arterial pressure and (MAP) and NAG urine excretion in the group of hypertensive patients which may reflect the renal ischemia in tubulo-interstitial pathology. Our data suggests that in nontreated arterial hypertension the renal blood flow disturbances are the important cause of the deterioration of tubular function (which are earlier to glomerular damage).
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PMID:[Does any relationship exist between metabolic disturbances and some markers of renal damage in patients with untreated essential hypertension?]. 1139 62

The purpose of this work was to observe the excretion of specific types of urinary proteins and urinary enzymes in elderly essential hypertension patients, for early detection and targeted treatment of hypertensive nephropathy in the elderly. A total of 120 elderly essential hypertensive patients and 38 healthy elderly volunteers were involved. The urinary excretion rate of retinal-binding protein (RBP), transferrin (Tf), albumin (Alb), and urinary enzyme N-acetyl-beta-D-glucosaminidase (NAG) activity were determined. Patients were divided into two groups according to their creatinine clearance (Cockroft-Gault formula). There were 88 patients in group A, whose glomerular filtration rate (GFR) was >or=80 mL/min, and 32 patients in group B with a GFR <80 mL/min. Among the essential hypertensive patients, urinary excretion rates of RBP, Alb, Tf, and NAG were increased in both groups compared with the healthy controls. But the amount of urinary protein differed between group A and group B. The excretion rate of specific urinary protein and urinary enzyme had a positive relationship with the duration of course of hypertension. We believe that specific types of urinary proteins and urinary enzymes may be useful markers for early diagnosis of hypertensive nephropathy; they can also be regarded as a clinical indicator of the progression of hypertensive nephropathy, serving in the assessment of therapeutic effects.
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PMID:Clinical value of urinary kidney biomarkers for estimation of renal impairment in elderly Chinese with essential hypertension. 1820 May 78


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