Sex Differences in Urinary Angiotensinogen (uAGT) Excretion, Renal Function, and Systolic Blood Pressure in 2‐Kidney, 1‐Clip Hypertensive Rats

2020 ◽  
Vol 34 (S1) ◽  
pp. 1-1
Author(s):  
Annie L. Bell ◽  
Weijian Shao ◽  
Akemi Katsurada ◽  
Ryosuke Sato ◽  
L. Gabriel Navar
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Sex Differences ◽  
Systolic Blood Pressure ◽  
Hypertensive Rats ◽  
Urinary Angiotensinogen

scholarly journals Comparative Evaluation of Aloe vera and Diclofenac on Body Weight, Blood Pressure and Renal Function of Hypertensive Rats

2021 ◽  
Vol 35 (1) ◽  
pp. 39-44
Author(s):  
Nadeem Yaqoob
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Body Weight ◽  
Systolic Blood Pressure ◽  
Aloe Vera ◽  
Treated Group ◽  
Control Group ◽  
Hypertensive Rats ◽  
Aloe Vera Gel ◽  
Group B

Introduction: NSAIDs are known to cause salt and water retention leading to hypertension and renal impairment. Aloe vera gel has been used in medicinal preparations for decades. Limited data is available regarding effect of Aloe vera on renal function. There is a need to search this aspect of Aloe vera, to use it judiciously. Aims & Objectives: To estimate and compare the effects of Aloe vera and diclofenac on systolic blood pressure and renal functions of hypertensive rats. Place and duration of study: This study was conducted at Post Graduate Medical Institute Lahore, Sargodha Medical College, Sargodha and Department of Pharmacy, University of Sargodha for the period of three months. Material & Methods: Male Sprague Dawley rats (n=24) were divided into four groups; Group A (Normal control), Group B (Hypertensive control), Group C (Aloe vera treated) and Group D (Diclofenac treated). Hypertension was induced in groups B, C and D by 20% sucrose diet in 8 weeks. After induction of hypertension, distilled water, dried Aloe vera gel 400 mg/kg and diclofenac 12 mg/kg were given orally to group B, C and D respectively for 2 weeks as a single morning dose. Body weight and systolic blood pressure were measured weekly, while serum creatinine, creatinine clearance and urinary proteins were estimated and compared at 0, 8 and 10 weeks. Data was analyzed using SPSS 23 and p value of ?0.05 was considered significant. Results: Diclofenac decreased body weight of rats non-significantly and increased systolic blood pressure significantly (p< 0.03) whereas Aloe vera increased body weight significantly (p<0.012) and had no significant effect on systolic blood pressure. Diclofenac treated group showed deterioration of renal function as compared to Aloe vera treated group numerically. Conclusion: Aloe vera may be safer anti-inflammatory agent than diclofenac for treatment of chronic inflammatory conditions if the patient also has hypertension or renal disease.

scholarly journals Effects of Valsartan vs Amlodipin on renal function in salt loaded spontaneously hypertensive rats

2014 ◽  
Vol 60 (01) ◽  
pp. 53-59
Author(s):  
Kalina Gjorgjievska ◽  
Dimce Zafirov ◽  
Maja Jurhar Pavlova ◽  
Svetlana Cekovska
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Body Weight ◽  
Systolic Blood Pressure ◽  
Spontaneously Hypertensive Rats ◽  
Treated Group ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Treatment Groups ◽  
Renal Function Tests

The goal of this study was to compare the effects of valsartan and amlodipin on the systolic blood pressure and parameters specific to the renal function in salt loaded spontaneously hypertensive rats (SHR). 32 male SHR were used at age of 20 weeks and body weight ranging between 265-300 g. From 8 weeks of age tab water was replaced with a solution of NaCl (1%) given ad libitum. Rats were divided into 2 groups: valsartan treated group SHRVAL (n=16) in which valsartan was given at a dose of 10 mg/kg b. w. and amlodipine treated group SHRAMLO (n=16) in which amlodipine was given at a dose of 5 mg/kg b. w. For a period of 12 weeks we have evaluated the effect of the investigated drugs on systolic blood pressure, body weight and renal function tests. In salt loaded rats amlodipine was more effective in reducing the systolic blood pressure in contrast to valsartan who had more pronounced effect on renal parameters most evident in proteinuria. Since both treatment groups have different mechanism of action a combination therapy may be beneficial in improving renal function in SHR rats.

Effects of Moxibustion on Blood Pressure and Renal Function in Spontaneously Hypertensive Rats

1997 ◽  
Vol 25 (01) ◽  
pp. 21-26 ◽  
Author(s):  
Ho Sub Lee ◽  
Yun Cho Yu ◽  
Seong Tae Kim ◽  
Kyung Sik Kim
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Atrial Natriuretic Peptide ◽  
Systolic Blood Pressure ◽  
Natriuretic Peptide ◽  
Plasma Levels ◽  
Spontaneously Hypertensive Rats ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Atrial Natriuretic

The aim of this study was to investigate the effects of moxibustion at the meridian points BL-15 (Xin-shu) and BL-27 (Xiao-chang-shu) on renal function, systolic blood pressure, plasma levels of renin activity, aldosterone and atrial natriuretic peptide in spontaneously hypertensive rats. The results showed that urine volume increased significantly after moxibustion at the meridian points BL-15, but decreased at BL-27. Urinary excretion of Na + decreased after moxibustion at the meridian points BL-15 and BL-27. Systolic blood pressure decreased after moxibustion at the meridian point BL-15. No effect was observed at BL-27. Plasma levels of aldosterone and renin activity increased significantly, but the levels of atrial natriuretic peptide decreased significantly after moxibustion at BL-15. Plasma levels of aldosterone and atrial natriuretic peptide increased significantly after moxibustion at the meridian points BL-27. These results suggest that the meridian points BL-15 and BL-27 are related to the regulation of renal function and the secretion of hormone with body fluid metabolism.

Metformin decreases plasma insulin levels and systolic blood pressure in spontaneously hypertensive rats

1994 ◽  
Vol 267 (4) ◽  
pp. H1250-H1253 ◽  
Author(s):  
S. Verma ◽  
S. Bhanot ◽  
J. H. McNeill
Keyword(s):  
Blood Pressure ◽  
Systolic Blood Pressure ◽  
Spontaneously Hypertensive Rats ◽  
Plasma Insulin ◽  
Metformin Treatment ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Insulin Levels ◽  
Plasma Insulin Levels ◽  
Wistar Kyoto

To determine the relationship between hyperinsulinemia and hypertension in spontaneously hypertensive rats (SHR), the antihyperglycemic agent metformin was administered to SHR and their Wistar-Kyoto (WKY) controls, and its effects on plasma insulin levels and blood pressure were examined. Five-week-old rats were started on oral metformin treatment (350 mg.kg-1.day-1, which was gradually increased to 500 mg.kg-1.day-1 over a 2-wk period). Metformin treatment caused sustained decreases in plasma insulin levels in the SHR (27.1 +/- 2.3 vs. untreated SHR 53.5 +/- 2.7 microU/ml, P < 0.001) without having any effect in the WKY (30.7 +/- 2.2 vs. untreated WKY 37.8 +/- 1.6 microU/ml, P > 0.05). The treatment did not affect the plasma glucose levels in any group. Metformin treatment also attenuated the increase in systolic blood pressure in the SHR (157 +/- 6.0 vs. untreated SHR 196 +/- 9.0 mmHg, P < 0.001) but had no effect in the WKY (134 +/- 3 vs. untreated WKY 136 +/- 4 mmHg, P > 0.05). Furthermore, raising plasma insulin levels in the metformin-treated SHR to levels that existed in the untreated SHR reversed the effect of metformin on blood pressure (189 +/- 3 vs. untreated SHR 208 +/- 5.0 mmHg, P > 0.05). These findings suggest that either hyperinsulinemia may contribute toward the increase in blood pressure in the SHR or that the underlying mechanism is closely associated with the expression of both these disorders.

scholarly journals Sex differences in risk factors for myocardial infarction: cohort study of UK Biobank participants

BMJ ◽  
2018 ◽  
pp. k4247 ◽  
Author(s):  
Elizabeth R C Millett ◽  
Sanne A E Peters ◽  
Mark Woodward
Keyword(s):  
Risk Factors ◽  
Myocardial Infarction ◽  
Blood Pressure ◽  
Type 1 Diabetes ◽  
Sex Differences ◽  
Confidence Interval ◽  
Systolic Blood Pressure ◽  
Uk Biobank ◽  
Hazard Ratios

AbstractObjectivesTo investigate sex differences in risk factors for incident myocardial infarction (MI) and whether they vary with age.DesignProspective population based study.SettingUK Biobank.Participants471 998 participants (56% women; mean age 56.2) with no history of cardiovascular disease.Main outcome measureIncident (fatal and non-fatal) MI.Results5081 participants (1463 (28.8%) of whom were women) had MI over seven years’ mean follow-up, resulting in an incidence per 10 000 person years of 7.76 (95% confidence interval 7.37 to 8.16) for women and 24.35 (23.57 to 25.16) for men. Higher blood pressure indices, smoking intensity, body mass index, and the presence of diabetes were associated with an increased risk of MI in men and women, but associations were attenuated with age. In women, systolic blood pressure and hypertension, smoking status and intensity, and diabetes were associated with higher hazard ratios for MI compared with men: ratio of hazard ratios 1.09 (95% confidence interval 1.02 to 1.16) for systolic blood pressure, 1.55 (1.32 to 1.83) for current smoking, 2.91 (1.56 to 5.45) for type 1 diabetes, and 1.47 (1.16 to 1.87) for type 2 diabetes. There was no evidence that any of these ratios of hazard ratios decreased with age (P>0.2). With the exception of type 1 diabetes, the incidence of MI was higher in men than in women for all risk factors.ConclusionsAlthough the incidence of MI was higher in men than in women, several risk factors were more strongly associated with MI in women compared with men. Sex specific associations between risk factors and MI declined with age, but, where it occurred, the higher relative risk in women remained. As the population ages and the prevalence of lifestyle associated risk factors increase, the incidence of MI in women will likely become more similar to that in men.

Effect of chronic NG-nitro-L-arginine methyl ester (L-NAME) on blood pressure and renal function in conscious uninephrectomized spontaneously hypertensive rats

1998 ◽  
Vol 76 (1) ◽  
pp. 63-67 ◽  
Author(s):  
María Reverte ◽  
Olga Flores ◽  
Belén Gallego ◽  
Antonio Lestón ◽  
José Miguel López-Novoa
Keyword(s):  
Blood Pressure ◽  
Drinking Water ◽  
Renal Function ◽  
Methyl Ester ◽  
Spontaneously Hypertensive Rats ◽  
Low Dose ◽  
Potassium Excretion ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Sodium And Potassium

We have studied during 30 days the effect of a low dose of NG-nitro-L-arginine methyl ester (1 mg ·kg-1 ·day-1 in drinking water) in the presence of D- or L-arginine (1 mg ·kg-1 ·day-1 in drinking water) in comparison with D- or L-arginine alone on blood pressure and renal function in conscious uninephrectomized female spontaneously hypertensive rats. At the end of the study, there was a significant increase in systolic blood pressure in the NG-nitro-L-arginine methyl ester + D-arginine group (307 ± 6 mmHg (1 mmHg = 133.3 Pa), n = 14, p << 0.05) in comparison with NG-nitro-L-arginine methyl ester + L-arginine (281 ± 6 mmHg, n = 14), L-arginine (262 ± 5 mmHg, n = 13), and D-arginine (258 ± 7 mmHg, n = 12) groups. There were no changes in diuresis, proteinuria, or sodium and potassium excretion between differently treated animals during this study. These results suggest that in uninephrectomized female spontaneously hypertensive rats, after 1 month blockade of NO synthesis with a low dose of NG-nitro-L-arginine methyl ester, vasculature is under tonic control by NO and it is not correlated with renal dysfunction.Key words: Key words: NG -nitro-L-arginine methyl ester (L-NAME), kidney, hypertension, spontaneously hypertensive rats, renaldysfunction, uninephrectomy.

scholarly journals Sex differences in cardio-metabolic and cognitive parameters in rats with high-fat diet-induced metabolic dysfunction

2020 ◽  
Vol 245 (11) ◽  
pp. 977-982
Author(s):  
You Kyoung Shin ◽  
Yu Shan Hsieh ◽  
A Young Han ◽  
Soonho Kwon ◽  
Geun Hee Seol
Keyword(s):  
Blood Pressure ◽  
Sex Differences ◽  
Cognitive Impairment ◽  
Carotid Artery ◽  
Systolic Blood Pressure ◽  
Dietary Fat ◽  
High Fat Diet ◽  
Fat Intake ◽  
Metabolic Dysfunction ◽  
High Fat

Excessive dietary fat intake is related to metabolic dysfunction and enhances susceptibility to hypertension and cognitive impairment. Although there are sex differences in the prevalence and progression of these diseases, few studies have investigated sex differences in cardio-metabolic and cognitive parameters in rats with high-fat diet-induced metabolic dysfunction. To better reflect actual clinical conditions, sex-differences in rats with high-fat diet-induced metabolic dysfunction were evaluated. Male and female Sprague-Dawley rats were fed a high-fat diet to induce metabolic dysfunction and intraperitoneally injected with N-nitro-L-arginine methyl ester and scopolamine to model vulnerability to hypertension and cognitive impairment, respectively, whereas control rats were fed a regular diet and treated with distilled water and 0.9% saline. Male experimental rats showed significantly higher systolic blood pressure than female experimental animals. More importantly, acetylcholine-induced relaxation of carotid arteries was decreased only in the male experimental rats, revealing a significant difference compared with female experimental rats. These findings provide evidence for individualized sex-based management of patients with metabolic dysfunction and susceptibilities to hypertension and cognitive impairment. Impact statement Excessive dietary fat intake plays important roles in the process of metabolic dysfunction and increases susceptibilities to chronic diseases such as hypertension. Few previous studies, however, have accurately reflected real-world medical conditions. In addition, studies performed to date have not examined detailed sex-differences in cardio-metabolic and cognitive parameters, precluding the development of sex-tailored interventions for patients with metabolic dysfunction who are susceptible to hypertension and cognitive impairment. In this study, using rats with HFD-induced metabolic dysfunction that made them susceptible to hypertension and cognitive impairment, we demonstrate that male rats show greater impairment of acetylcholine-induced vasorelaxation of the carotid artery and systolic blood pressure compared to female rats. These findings may provide a basis for the early detection of carotid artery dysfunction and systolic blood pressure increase, especially in males.

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