Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.4.23.15 (renin)
 35,795 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Basic parameters of central and intracardiac hemodynamics were studied in 49 urological patients 24 of which with urolithiasis entered group I, 13 with hypertension-group II and 12 with varicocele-group III. The patients' age averaged 46.4, 41.6 and 28.6 years, respectively. The data were provided by routine clinical and laboratory examinations, ECG, one-passage radionuclide cardiography with 132I-albumin using a radiocirculographer of Hungarian manufacture and radiocardioanalyzer RKAZ-01 made in this country. Neither marked ischemic disturbances of the myocardium nor valvular defects were revealed. Ambiguous group-specific shifts presented in central and intracardiac hemodynamics. Total peripheral vascular resistance exhibited a moderate increase while left ventricular circulation time grew 1.5-2-fold. The greater resistance can be attributed to activation of renin-angiotensin system in prolonged ischemia of renal parenchyma due to nephrolithiasis. Group II patients demonstrated parallel elevation of arterial pressure, peripheral resistance, left ventricular performance and output suggesting myocardial functional stress. In group III there was a rise in blood volume, left ventricular performance and output, cardiac index, stroke volume. This myocardial overloading may result from changes in intravascular volumetric relations characteristic of hypervolemia. These hemodynamic changes reflect adaptation in urological patients and should be accounted for in treatment and operative interventions.
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PMID:[The radionuclide assessment of the central hemodynamic indices in patients with urolithiasis, arterial hypertension and varicocele]. 194 10

Based on the analysis of a RX-ray study and a selective blood test for the activity of the plasma renin, aldesterone, hydrocortisone and adrenocorticotropic hormone (ACTH) in 57 patients with arterial hypertension--14 persons without renal failure, 14 ones regularly treated by hemodialysis, 29 patients with left orthostatic varicocele--the authors demonstrated the impact of the renal arterio- and phlebography on the hormone levels studied. Arteriography resulted in an increase in the absolute value of the renal vein renin mean 2.1-fold, aldosterone, 3.3-fold and hydrocortisone, 1.7-fold. A 2.2-fold increase in the renin activity and a 2.6-fold increase in the levels of aldosterone and hydrocortisone noted in all the patients were the result of retrograde renal phlebography. No correlations were established between the changes in hormone levels and the central mechanism of the secretion regulation (ACTH). Radiopaque investigations of the patients with arterial hypertension gave 22 per cent of false positive results with regard to the site of renin secretion and 18 per cent of those with regard to the participation of the studied kidney in renin secretion. The authors supposed a possible regulation of adrenal mineralocorticoid performance by a retrograde blood flow appeared through the adrenal central veins that was induced by phlebography--related elevation of blood pressure in the renal vein.
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PMID:[The effect of renal arterio- and phlebography on the function of the renin-angiotensin and hypophyseal-adrenal systems]. 218 46

Selective renal phlebography, phlebotonometry, selective analysis of the blood from the renal veins and vena cava inferior for the activity of plasma renin, catecholamines, prostaglandins E2, pO2 and pCO2, peripheral blood analysis for levels of progesterone, androstendione, testosterone, ACTH, ACTH-tolerance test, orchidometry, ejaculate microscopy, evaluation of seminal plasma testosterone, trochanter index and parameters of sexual maturation were performed during the treatment of 70 patients with left varicocele. Based on the results the authors concluded that not only the left testicle, but the left adrenal was involved in the course of organic renal venous hypertension. A significant feedback correlation was revealed between the peripheral blood progesterone and the left kidney venous pressure (r = -0.50, p less than 0.01) and between the peripheral blood progesterone and the number of motile spermatozoa in the ejaculate (r = -0.31, p less than 0.05). Pathogenesis of organic renal venous hypertension and spermatogenesis failure were supplemented by the conclusion that the left adrenal central vein was the first to involve into the compensation of venous hypertension. Retrograde alterations in the direction of the blood flow in the left adrenal central vein resulted in the abnormal stimulation of steroidogenesis in the cortical layer. The excessive production of antiandrogenic steroid hormones by the left adrenal gland was a cause of spermatogenesis damage in both testicles. The blockage of the left adrenal androgenic hormones of the hypothalamo-hypophyseal system can deteriorate the process.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[The role of the functional interrelation of the adrenals and testes in the pathogenesis of sterility in patients with left-sided varicocele]. 236 17

To investigate the secretion of renin from the Leydig cells of human testis, plasma renin activity (PRA) in left internal spermatic vein (ISV) and cubital vein (CV) was measured at the time of surgical repair of varicocele in 30 patients between 26 and 39 years old. Sixteen of them were given a single i.m. injection of hCG (10,000 iu) 4 days before operation, whereas the remaining fourteen were not treated. Although mean PRA levels of CV in treated and non-treated groups were similar (1.35 +/- 0.46 and 1.19 +/- 0.59 ng/ml/hr, respectively), mean PRA level of ISV in the treated group (2.85 +/- 1.15 ng/ml/hr) was significantly higher than that of CV in the same group (1.35 +/- 0.46 ng/ml/hr), and that of ISV in the non-treated group (1.39 +/- 0.67 ng/ml/hr) (both P less than 0.01). Mean testosterone level of the same ISV was clearly higher in the treated than in non-treated group (P less than 0.005). These data seem to suggest the secretion of hCG-induced renin from the human testis in vivo and the possibility of relation between androgens and secretion of renin.
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PMID:[Induction of plasma renin activity in human internal spermatic vein after treatment of HCG]. 267 80

To study changes in renin secretion from the human testis at various days after hCG treatment, plasma renin activity in the internal spermatic vein (ISV) and cubital vein (CV) was measured at the time of surgical repair of varicocele in 79 patients. Sixty-five of them were given a single administration of hCG (10,000 IU/m2) 1 to 10 days before operation. Although the mean PRA levels in CV in both treated and untreated groups were similar, the mean PRA levels in ISV obtained 1 to 5 days after hCG treatment were significantly higher than that in the untreated group. However, the mean PRA levels in ISV returned to that in the untreated group 6-10 days after treatment. Serum testosterone levels in the same ISV were also much higher 1 to 6 days after hCG treatment, compared with those in the untreated group. On the basis of these results it is concluded that (a) the secretion of renin from the testis into ISV can be demonstrated for 5 days after hCG treatment; (b) the parallel increases in PRA with testosterone in ISV seem to suggest a possible influence of androgen on renin production in Leydig cells of human testis.
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PMID:Correlative changes of plasma renin activity and serum testosterone in human internal spermatic vein after single administration of human chorionic gonadotropin. 270 Jan 86

A combined study, including phlebography, phlebotonometry, orchidometry, morphometric determination of microcirculatory testicular volume, microscopic and biochemical ejaculate studies, determination of peripheral blood levels of adrenocortical mineral glucocorticoid hormones before and after ACTH administration in the blood, sampled from various veins prior to phlebography, assessment of osmolality, pO2 and pCO2 in the blood samples from spermatic venous plexus, left renal vein and intrarenal portion of the vena cava inferior, and determination of plasma renin activity in renal veins, was conducted in 55 patients with varicocele. A considerable increase in orthostatic blood pressure of the left spermatic venous plexus is demonstrated that may be due to retrograde blood flow in the left testicular venous plexus, resulting in a microcirculatory disturbance and gradual atrophy of a testicle. There was a correlation between the severity of varicocele and left-testicular volume which was absent for total testicular volume, while microcirculatory volumes of the testes differed significantly, suggesting the absence of hemodynamic disorders in the contralateral testicle and, consequently, no spermatogenetic impairment due to hemodynamic changes in cases of a unilateral varicocele. Phlebographic and phlebotonometric evidence points to a retrograde blood flow through the central vein of the left adrenal. The results of adrenal functional studies demonstrate a significant tendency to adrenal hypersynthesis of aldosterone and cortisol in patients with varicocele. A correlation demonstrated between peripheral blood cortisol level and the proportion of spermatozoa with abnormal headpiece structure in the ejaculate has suggested a cause-and-effect relationship between adrenal dysfunction and infertility in patients with varicocele.
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PMID:[The role of disorders of mineralocorticoid function of the adrenal glands in the development of infertility in patients with left-side varicocele]. 272 40

To better understand the local renin-angiotensin system in Leydig cells of the human testis, the plasma renin activity (PRA) and plasma concentration of angiotensin II (PAII) in the left internal spermatic vein (ISV) and cubital vein (CV) were measured at the time of surgical repair of varicocele in 27 patients. Fourteen of the patients were given a single i.m. injection of hCG (10,000 IU/m2) 4 days before the operation, whereas the remaining 13 were not treated. Although the mean PRA or PAII levels in the CV in the treated and nontreated groups were similar, both levels in the ISV in the treated group were significantly higher than in the nontreated group (p less than 0.05). For PAII levels in the treated group, nine of 11 patients with an increased PRA level showed significantly higher levels than the normal peripheral PAII value. The serum testosterone levels in the same ISV were also much higher in the treated group than in the nontreated group (p less than 0.001). These results suggested the possibility that sex steroids might influence the renin-angiotensin system in Leydig cells.
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PMID:Induction of renin-angiotensin system in human testis in vivo. 305 8

In order to investigate the secretion of renin from the Leydig cells of human testis, plasma renin activity (PRA) in left internal spermatic vein (ISV) and cubital vein (CV) was measured at the time of surgical repair of varicocele in 19 patients aged from 21 to 39 years. Ten of them were given a single im administration of hCG (10,000 IU/m2) 4 days before the operation, whereas the remaining nine were not treated. Although mean PRA levels in CV in treated and non-treated groups were similar (1.25 +/- 0.45 and 1.14 +/- 0.38 nmol/l per h, respectively), mean PRA level of ISV in the treated group (3.52 +/- 0.76 nmol/l per h) was significantly higher than that in the non-treated group (1.30 +/- 0.32 nmol/l per h) (P less than 0.01); serum testosterone levels in the same ISV were also much higher in the treated than in non-treated group (P less than 0.001). These data show the following results; 1) under basal conditions, no release of renin from Leydig cells into testicular blood flow could be observed; 2) after treatment with hCG, the secretion of renin into the ISV seemed to be demonstrable. The present results suggest for the first time the secretion of hCG-induced renin from the human testis in vivo.
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PMID:Demonstration of gonadotropin-induced plasma renin activity in human internal spermatic vein. 328 97