Prediction of remodeling of small diameter arteries in the model of experimental glomerulonephritis

2020 ◽  
Vol 24 (5) ◽  
pp. 64-71
Author(s):  
E. S. Levitskaya ◽  
M. M. Batiushin ◽  
I. N. Kasich ◽  
M. A. Akimenko ◽  
O. V. Voronova ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Sodium Chloride ◽  
Protein Level ◽  
Small Diameter ◽  
Systemic Blood Pressure ◽  
Control Group ◽  
Leading Role ◽  
Urgent Task ◽  
Artery Remodeling

BACKGROUND. Determining the pathogenetic mechanisms of small-caliber renal artery remodeling in chronic glomerulone­phritis (GN) is an urgent task of nephrology, the implementation of which will allow establishing new diagnostic and therapeutic approaches to patients management. THE AIM: To evaluate the influence of hemodynamic, tubulointerstitial, and endothe- liotropic risk factors on the probability of remodeling of interlobular arteries in an experimental model of glomerulonephritis. MATERIALS AND METHODS. The experiment included 45 individuals of white mongrel rats, 3 of which were used to prepare an antigen suspension (AS), and 42 rats were divided into 4 groups: 9 individuals in the main groups (with the introduction of only AS, with the introduction of an incomplete Freund adjuvant, with AS and sodium chloride, with AS and perindopril) and 6 ratsin the control group. Glomerulonephritis was formed in the main groups of the experiment. Systolic blood pressure (SAD), the protein level in the urine, and the presence of edematous syndrome were monitored initially, on the 15th, 30th, and 60th day of the experiment. The size of the interlobular artery (MA) was determined by the morphological study, and the expression of VEGF and TGFp in the kidneys. RESULTS. Morphological signs of glomerulonephritis were obtained in all the main groups of the experiment as early as day 15. The greatest increase in SAD, protein in the urine, the presence of edematous syndrome in groups with the introduction of AS and AS with sodium chloride was found. The highest expression of VEGF and TGFp was found in these groups of rats. In the group with AS with perindopril, normotension was formed, the protein level was lower than in rats with AS with or without the use of sodium chloride, and there was no edematous syndrome. The expression of VEGF and TGFp was minimal. Interlobular artery remodeling in established groups of AS an AC with sodium chloride. In the remain­ing groups of rats, the size of the interlobular arteries was comparable to the control group. CONCLUSION. The leading role of systemic blood pressure in the remodeling of small-diameter kidney arteries in glomerulonephritis has been established. Despite the presence of active glomerulonephritis in rats, the structure of small arteries does not change during the formation of normotension.

scholarly journals Accumulation of Prostacyclin in Rat Brain during Haemorrhagic Hypotension—Possible Role of PGI2 in Autoregulation

1984 ◽  
Vol 4 (1) ◽  
pp. 107-109 ◽  
Author(s):  
E. Shohami ◽  
A. Sidi
Keyword(s):  
Blood Pressure ◽  
Steady State ◽  
Control Group ◽  
Prostaglandin E ◽  
Cortical Tissue ◽  
Arterial Blood ◽  
Haemorrhagic Hypotension ◽  
Potent Vasodilator ◽  
Prostaglandin F

The effect of haemorrhagic hypotension on the levels of prostaglandin E2 (PGE2), thromboxane B2 (TXB2), and 6-keto prostaglandin F1α (6-keto-PGF1α) in cortical tissue of rats was studied. Lightly anesthetized rats were subjected to steady-state hypotension for 15 min, with a mean arterial blood pressure of 80, 60, and 40 mm Hg, and compared to a control group of normotensive rats. No significant change was found in the levels of PGE2 and TXB2. The level of 6-keto-PGF1α increased from 7.8 ± 0.9 to 14.1 ± 1.9 pg/mg protein (p < 0.02) at 80 mm Hg. Our findings suggest that prostacyclin, which is a potent vasodilator, might play a role in setting the lower limit of the autoregulation range.

Renal and pressor effects of aminoguanidine in cirrhotic rats with ascites.

1996 ◽  
Vol 7 (12) ◽  
pp. 2694-2699
Author(s):  
M C Ortíz ◽  
L A Fortepiani ◽  
C Martínez ◽  
N M Atucha ◽  
J García-Estañ
Keyword(s):  
Nitric Oxide ◽  
Blood Pressure ◽  
Liver Cirrhosis ◽  
Experimental Model ◽  
Systemic Blood Pressure ◽  
Arterial Hypotension ◽  
Control Group ◽  
No Production ◽  
Water Excretion ◽  
Excretory Function

Recent work indicates that nitric oxide (NO) plays an important role in the systemic and renal alterations of liver cirrhosis. This study used aminoguanidine (AG), a preferential inhibitor of inducible nitric oxide synthase (iNOS), to evaluate the role of this NOS isoform in the systemic and renal alterations of an experimental model of liver cirrhosis with ascites (carbon tetrachloride/ phenobarbital). Experiments have been performed in anesthetized cirrhotic rats and their respective control rats prepared for clearance studies. Administration of AG (10 to 100 mg/kg, iv) elevated dose-dependent mean arterial pressure (MAP, in mm Hg) in the cirrhotic rats from a basal level of 79.3 +/- 3.6 to 115.0 +/- 4.7, whereas in the control animals, MAP increased only with the highest dose of the inhibitor (from 121.8 +/- 3.6 to 133.3 +/- 1.4). In the cirrhotic group, AG also significantly increased sodium and water excretion, whereas these effects were very modest in the control group. Plasma concentration of nitrates+nitrites, measured as an index of NO production, were significantly increased in the cirrhotic animals in the basal period and decreased with AG to levels not significantly different from the control animals. Similar experiments performed with the nonspecific NOS inhibitor N omega-nitro-L-arginine (NNA) also demonstrated an increased pressor sensitivity of the cirrhotic rats, but the arterial hypotension was completely corrected. These results, in an experimental model of liver cirrhosis with ascites, show that AG exerts a beneficial effect as a result of inhibition of NO production, increasing blood pressure and improving the reduced excretory function. Because NNA, but not AG, completely normalized the arterial hypotension, it is suggested that the constitutive NOS isoform is also contributing in an important degree. It is concluded that the activation of both inducible and constitutive NOS isoforms plays an important role in the lower systemic blood pressure and associated abnormalities that characterize liver cirrhosis.

Ethanol Extract Combinations Effect of Celery Herb (Apium graveolens L.) and Bay Leaf (Syzygium polyanthum W.) Toward Hypertensive Mice Induced by Sodium Chloride and High Fat Feed

2021 ◽  
Vol 1162 ◽  
pp. 151-158
Author(s):  
Moch. Saiful Bachri ◽  
Widyasari Putranti ◽  
Lina Widiyastuti ◽  
Resalianti Sintiana Devie
Keyword(s):  
Blood Pressure ◽  
Sodium Chloride ◽  
Research Result ◽  
Ethanol Extract ◽  
Apium Graveolens ◽  
Control Group ◽  
High Fat ◽  
Control Group Design ◽  
Group Design ◽  
Hypertension Therapy

The combination of herb medicine is alternative option in hypertension because it has more potential for treatment with complications like hyperlipida. Plant which can be used for anti-hypertension therapy is combination of celery herb (Apium graveolens) and bay leaf ethanol extract (Syzygium polyanthum). This research aims to determine the activity of a combination of celery herb ethanol extract (CHEE) and bay leaf ethanol extract (BLEE) and find out how much the decrease of blood pressure on the combination of both toward hypertension with high fat Wistar mice. The design of this research used an experimental design with pre-post control group design. Hypertensive mice are induced with high fat feed and orally with sodium chloride 8%, then the mice are supplied with combinations extract with the dose of 1.125 ; 6.25 ; 2.25 ; 12.5 and 4.5 ; 25 mg/kg, hydrochlorotiazide 2.25 mg/kg, Simvastatin 0.9 mg/kg, CHEE 4.5 mg/kg, BLEE 25 mg/kg and CMC-Na 0.5%. Research result shows that the combination can decrease systole blood pressure in the 22nd day. The extract combination has anti-hypertension effect (it is able to decrease systole blood pressure ≥ 20 mmHg) and it is not significantly different with normal group (p<0.05). Based on the research, it can be concluded that ethanol extract combination can decrease systole blood pressure with high fat complications after using it for 22 days.

scholarly journals Methane-Rich Saline: A Potential Resuscitation Fluid for Hemorrhagic Shock

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Yingmu Tong ◽  
Yanyan Dong ◽  
Yang Feng ◽  
Zeyu Li ◽  
Yifan Jia ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Hemorrhagic Shock ◽  
Autologous Blood ◽  
Serum Levels ◽  
Systemic Blood Pressure ◽  
Multiple Organ ◽  
Shock Group ◽  
Control Group ◽  
Sham Control ◽  
Resuscitation Fluid

Hemorrhagic shock is caused by massive blood loss. If the patient is not fully resuscitated in time, this may eventually lead to multiple organ failure and even death. Previous studies on methane-rich saline in animal models showed that it confers resistance against many diseases. In this study, we explored the protective effect of methane-rich saline, used as a resuscitation fluid, in hemorrhagic shock. Hemorrhagic shock was induced in SD rats by bloodletting via intubation of the right femoral artery. The rats were divided into three groups: a sham control group (sham control), a shock group resuscitated by an infusion of autologous blood and an equivalent volume of normal saline (Shock+NS), and a shock group resuscitated by an infusion of autologous blood and an equivalent volume of methane-rich saline (Shock+MRS). Assessment of blood pressure and levels of plasma lactate showed that resuscitation using methane-rich saline (MRS) restored systemic blood pressure and reduced the levels of lactate in the plasma. Meanwhile, lower levels of serum IL-6 and TNF-α were also observed in the group resuscitated with MRS. In the heart, liver, and kidney, MRS reduced inflammation and oxidative stress levels. Analysis of organ function via levels of biochemical indicators revealed that the group resuscitated with MRS had reduced serum levels of AST and CK, indicating a potential cardioprotective effect. The expression levels of apoptosis-related proteins, including those of Bcl-2/Bax, and the results of TUNEL-labeling assay indicated that MRS significantly reduced apoptosis in the heart. Methane also had a positive effect on the expression of the PGC-1α/SIRT3/SOD2 signaling pathway. Our results showed that MRS can potentially serve as a novel resuscitation fluid because of its anti-inflammatory, antioxidative, and antiapoptotic properties.

The Role of Systemic Blood Pressure in the Progression of Chronic Kidney Disease

2015 ◽  
Vol 9 (5) ◽  
Author(s):  
Karen A Griffin ◽  
Krishna Pothugunta ◽  
Aaron J Polichnowski ◽  
Anil K Bidani
Keyword(s):  
Blood Pressure ◽  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Systemic Blood Pressure ◽  
Systemic Blood

Role of bradykinin B1 and B2 receptors in normal blood pressure regulation

2006 ◽  
Vol 291 (2) ◽  
pp. E268-E274 ◽  
Author(s):  
Arvi Duka ◽  
Irena Duka ◽  
Guohong Gao ◽  
Sherene Shenouda ◽  
Irene Gavras ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Receptor Gene ◽  
Normal Blood ◽  
Control Group ◽  
Normal Blood Pressure ◽  
Concurrent Administration ◽  
Vasoactive Factors ◽  
Hoe 140 ◽  
The Impact

With inhibition or absence of the bradykinin B2 receptor (B2R), B1R is upregulated and assumes some of the hemodynamic properties of B2R, indicating that both participate in the maintenance of normal vasoregulation or to development of hypertension. Herein we further evaluate the role of bradykinin in normal blood pressure (BP) regulation and its relationship with other vasoactive factors by selectively blocking its receptors. Six groups of Wistar rats were treated for 3 wk: one control group with vehicle alone, one with concurrent administration of B1R antagonist R-954 (70 μg·kg−1·day−1) and B2R antagonist HOE-140 (500 μg·kg−1·day−1), one with R-954 alone, one with HOE 140 alone, one with concurrent administration of both R-954 and HOE-140 plus the angiotensin antagonist losartan (5 mg·kg−1·day−1), and one with only losartan. BP was measured continuously by radiotelemetry. Only combined administration of B1R and B2R antagonists produced a significant BP increase from a baseline of 107–119 mmHg at end point, which could be partly prevented by losartan and was not associated with change in catecholamines, suggesting no involvement of the sympathoadrenal system. The impact of blockade of bradykinin on other vasoregulating systems was assessed by evaluating gene expression of different vasoactive factors. There was upregulation of the eNOS, AT1 receptor, PGE2 receptor, and tissue kallikrein genes in cardiac and renal tissues, more pronounced when both bradykinin receptors were blocked; significant downregulation of AT2 receptor gene in renal tissues only; and no consistent changes in B1R and B2R genes in either tissue. The results indicate that both B1R and B2R contribute to the maintenance of normal BP, but one can compensate for inhibition of the other, and the chronic inhibition of both leads to significant upregulation in the genes of related vasoactive systems.

scholarly journals Blood pressure decrease with ingestion of a soya product (kinako) or fish oil in women with the metabolic syndrome: role of adiponectin and nitric oxide

2012 ◽  
Vol 108 (8) ◽  
pp. 1435-1442 ◽  
Author(s):  
Andréa Name Colado Simão ◽  
Marcell Alysson Batisti Lozovoy ◽  
Larissa Danielle Bahls ◽  
Helena Kaminami Morimoto ◽  
Tathiana Name Colado Simão ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Fish Oil ◽  
Inflammatory Markers ◽  
Inflammatory Marker ◽  
Control Group ◽  
Treatment Groups ◽  
The Metabolic Syndrome ◽  
Baseline Values

The aim of the present study was to verify the effects of fish oil and a soya-based product on inflammatory markers and endothelial function measured by NO in women with the metabolic syndrome (MetS). A total of sixty-five women (mean age: 47·9 (sd9·98) years) were studied in a 90-d parallel, randomised design. A control group maintained their usual diet; the second group received 29 g/d of soyabean (kinako); the third group received 3 g/d of fish oiln-3 fatty acids; and the fourth group received fish oil (3 g/d) and kinako (29 g/d). Anthropometric, blood pressure (BP), inflammatory markers, anti-inflammatory marker (adiponectin) and NO concentrations were evaluated. In relation to the baseline values, the group that received fish oil and kinako concomitantly presented a statistically significant decrease in systolic BP (SBP;P < 0·05), whereas there was a significant decrease in diastolic BP (DBP) in the control group (P < 0·05), kinako group (P < 0·01) and fish oil group (P < 0·01) after 90 d. There was a significant increase in adiponectin (P < 0·01) and NO values (P < 0·05) after 90 d in the kinako and fish oil groups. Differences between treatment groups verified a significant decrease (P < 0·05) in DBP in the kinako group after 90 d when compared to the results obtained from the fish oil and kinako groups. In conclusion, the findings of increased serum adiponectin and NO metabolite levels after 90 d, both in the fish oil and soya groups, reinforce the importance of the influence of adiponectin and NO levels on BP decrease in patients with the MetS.

Effects of Aldosterone and Spironolactone on Arterial Renin in Rats

1976 ◽  
Vol 51 (s3) ◽  
pp. 121s-123s ◽  
Author(s):  
J. Rosenthal
Keyword(s):  
Blood Pressure ◽  
Sodium Chloride ◽  
Subcellular Fractions ◽  
Renin Activity ◽  
Hypertensive Rats ◽  
Angiotensin I ◽  
Metabolic Role ◽  
Regulation Of Blood Pressure ◽  
Drinking Solution

1. The metabolic role of arterial angiotensin I-forming enzyme (i.e. renin activity) was studied in total homogenates and in subcellular fractions of the aorta of normotensive and hypertensive rats. 2. Angiotensin I-forming enzyme was measured in (a) uninephrectomized rats rendered hypertensive with d-aldosterone and sodium chloride (10 g/l) drinking solution, (b) rats treated in the same manner but with the addition of spironolactone, and (c) control rats. 3. Hypertension developed in aldosterone-treated rats within 3–6 weeks and was associated with decreased plasma and renal renin values. Total aortic renin activity was up to sixfold higher in the hypertensive animals than in control animals and there was an increased ratio of supernatant to microsomal renin activity in the aorta. 4. In spironolactone-treated rats blood pressure and total aortic renin concentrations were comparable with those in the control rats. 5. The results support the hypothesis that renin generated at local vascular sites, which is independent of circulating renin levels, contributes to regulation of blood pressure.

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