An Early Prenatal Exposure to Excess Glucocorticoid Leads to Hypertensive Offspring in Sheep

1998 ◽  
Vol 94 (2) ◽  
pp. 149-155 ◽  
Author(s):  
M. Dodic ◽  
C. N. May ◽  
E. M. Wintour ◽  
J. P. Coghlan
Keyword(s):  
Blood Pressure ◽  
Adrenocorticotropic Hormone ◽  
Plasma Renin ◽  
Later Life ◽  
Control Group ◽  
Entire Pregnancy ◽  
Basal Plasma ◽  
Vascular Sensitivity ◽  
Group 2 ◽  
Group 1

1. Recent studies in animals have linked fetal exposure to excess maternal glucocorticoids with the later occurrence of cardiovascular disorders, particularly hypertension. 2. To test the hypothesis that prenatal treatment could impact on adult blood pressure two groups of pregnant ewes were transported from the farm to the Institute at either 22–29 days of pregnancy (pretreatment group 1) or 59–66 days of pregnancy (pretreatment group 2), subjected to 48 h treatment with dexamethasone (0.28 mg day−1 kg−1 for 2 days) and then returned to the farm. The control group remained at the farm for the entire pregnancy. Lambs were then studied at approximately 4, 10 and 19 months after birth. 3. The basal mean arterial pressure in pretreatment group 1 (80 ± 1 mmHg at 124 days; 83 ± 1 mmHg at 309 days and 89 ± 1 mmHg at 558 days; n = 6) was significantly different (P < 0.05 in all groups) from that in the control group of lambs (74 ± 2 mmHg at 110 days; 76 ± 1 mmHg at 323 days and 81 ± 1 mmHg at 568 days; n = 7). However, prenatal glucocorticoid exposure did not alter vascular sensitivity to noradrenaline, angiotensin II and adrenocorticotropic hormone in these sheep at any of the ages studied, nor did it affect basal or adrenocorticotropic hormone-induced concentrations of Cortisol or basal plasma renin concentrations in the lambs at any age. 4. These data support the hypothesis that excess glucocorticoid exposure in early pregnancy, during a critical developmental stage or ‘window’, programmes higher blood pressure that persists in later life.

Differential Effects of Acute and Chronic β-Adrenoreceptor Blockade on Blood Pressure and the Renin—Angiotensin—Aldosterone System in Essential Hypertension

1976 ◽  
Vol 51 (s3) ◽  
pp. 537s-540s
Author(s):  
R. Kolloch ◽  
K. O. Stumpe ◽  
H. Vetter ◽  
W. Gramann ◽  
F. Krück
Keyword(s):  
Blood Pressure ◽  
Essential Hypertension ◽  
Chronic Administration ◽  
Plasma Renin ◽  
Plasma Aldosterone ◽  
Receptor Blockade ◽  
Plasma Aldosterone Concentration ◽  
Group 2 ◽  
Β Receptor ◽  
Group 1

1. Serial measurements of plasma renin activity (PRA), plasma aldosterone concentration (PA) and blood pressure were performed overnight in patients with borderline (group 1) and sustained essential hypertension (group 2) before and after acute and chronic administration of either propranolol or pindolol. 2. Group 1 patients exhibited a typical rhythm of recumbent PRA with low values before midnight and large increases early in the morning. 3. In contrast, no rhythm and very low PRA values were observed in patients of group 2. Blood pressure was higher in group 2 than in group 1. There was a significant correlation between the hyporeninaemic and hypotensive effect of either acute (r = 0·79) or chronic (r = 0·4) β-receptor blockade. 4. In group 1, after β-receptor blockade the day—night profile of renin was similar to that observed in group 2 before treatment. Thus, in this latter subgroup, low-renin profiles might reflect reduced β-adrenoreceptor activity. 5. Plasma aldosterone was lower in group 2 but appeared to be inappropriately high relative to renin. 6. The data suggest that in hypertensive patients classified according to their blood pressure and recumbent PRA profiles a significant relationship exists between changes in PRA and arterial pressure. Thus patients with high PRA respond better to treatment than patients with low renin. We conclude that in the patients studied sympathetic nervous system activity mainly determined renin values as well as anti-hypertensive effectiveness of the β-blocking drugs.

Effect of Sympathetic Nerve Inhibition on the State of Sodium—Volume Balance in Hypertensive Patients with Normal or Impaired Renal Function

1982 ◽  
Vol 63 (s8) ◽  
pp. 301s-303s ◽  
Author(s):  
V. M. Campes ◽  
D. Levitan ◽  
M. S. Romoff ◽  
Y. Saglikes ◽  
I. Sajo ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Essential Hypertension ◽  
Impaired Renal Function ◽  
Plasma Renin ◽  
Plasma Noradrenaline ◽  
Mean Blood Pressure ◽  
Volume Balance ◽  
Group 2 ◽  
Group 1

1. The effect of clonidine on the relationship between sympathetic nervous system activity and the state of sodium-volume balance was studied in 15 patients with essential hypertension and normal renal function (group 1) and in 14 patients with hypertension and mild to moderate renal failure (group 2). 2. Acutely, clonidine (200 μg) produced significant falls (P < 0.01) in mean blood pressure, plasma noradrenaline, plasma renin activity and plasma aldosterone in both groups of patients. The changes in mean blood pressure were significantly correlated (P < 0.01) with the changes in plasma noradrenaline. 3. Chronic therapy with clonidine also produced significant falls in mean blood pressure and plasma noradrenaline, but not in plasma renin activity or aldosterone. 4. Exchangeable sodium and plasma volume decreased significantly in patients of group 1 but not in patients of group 2. 5. The data indicate that sympathetic nerve activity may be important for the abnormal relationship between pressure and natriuresis in subjects with essential hypertension and normal renal function, but not in hypertensive subjects with impaired renal function.

Abnormal Haemostasis and Blood Viscosity in Malignant Hypertension

1984 ◽  
Vol 52 (03) ◽  
pp. 253-255 ◽  
Author(s):  
C Isles ◽  
G D O Lowe ◽  
B M Rankin ◽  
C D Forbes ◽  
N Lucie ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Viscosity ◽  
Renal Damage ◽  
Antithrombin Iii ◽  
Plasma Viscosity ◽  
Malignant Hypertension ◽  
Fibrin Deposition ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

SummaryWe have previously shown abnormalities of haemostasis suggestive of intravascular coagulation in patients with malignant hypertension, a condition associated with retinopathy and renal fibrin deposition. To determine whether such abnormalities are specific to malignant hypertension, we have measured several haemostatic and haemorheological variables in 18 patients with malignant hypertension (Group 1), 18 matched healthy controls (Group 2), and 18 patients with non-malignant hypertension (Group 3) matched for renal pathology, blood pressure and serum creatinine with Group 1. Both Groups 1 and 3 had increased mean levels of fibrinogen, factor VIIIc, beta-thrombo- globulin, plasma viscosity and blood viscosity (corrected for haematocrit); and decreased mean levels of haematocrit, antithrombin III and platelet count. Mean levels of fast antiplasmin and alpha2-macroglobulin were elevated in Group 1 but not in Group 3. We conclude that most blood abnormalities are not specific to malignant hypertension; are also present in patients with non-malignant hypertension who have similar levels of blood pressure and renal damage; and might result from renal damage as well as promoting further renal damage by enhancing fibrin deposition. However increased levels of fibrinolytic inhibitors in malignant hypertension merit further investigation in relation to removal of renal fibrin.

Analysis of the quality of early diagnostics of cardiovascular diseases in students of educational institutions of Khabarovsk (according to the data of preventive examinations)

2020 ◽  
pp. 13-16
Keyword(s):  
Blood Pressure ◽  
Cardiovascular Diseases ◽  
Sinus Tachycardia ◽  
Blood Pressure Level ◽  
Educational Institutions ◽  
Conduction Disturbances ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

To identify the prevalence of early pathology of cardiovascular diseases, a survey of 400 200 girls) in the age group 15 and 17 years old was conducted as a part of routine medical of the level of blood pressure (BP) was carried out, with the calculation of the average level pressure on the basis of three separate measurements estimated by percentile tables for a registration of a standard resting ECG in 12 leads. According to the results of the survey, into 3 groups: with an increase in blood pressure above 95 ‰ (group 1 – 16 people), which recorded in males (p<0,05); Group 2 (67 people) – adolescents with a normal blood pressure level and group 3 of adolescents with a decrease in blood pressure below 5 ‰ changes in the form of rhythm and conduction disturbances were noted in almost every a predominance of sinus tachycardia in the first group. In the third group of adolescents, form of ectopic rhythm and pacemaker migration were significantly more frequently only 78 % of adolescents were referred for consultation and in-depth examination by a pediatric cardiologist.

Antiurolithiatic effect of Cymbopogon Proximus, Alhagi Maurorum, on Sulfadimidine induced urolithiasis in male New Zealand rabbits

2019 ◽  
Vol 20 (1) ◽  
pp. 12-18
Author(s):  
Sameh El-Nabtity
Keyword(s):  
New Zealand ◽  
Intramuscular Injection ◽  
Negative Control Group ◽  
Negative Control ◽  
Control Group ◽  
Aqueous Extracts ◽  
Blood And Urine Samples ◽  
Group 2 ◽  
New Zealand Rabbits ◽  
Group 1

The present study aimed to investigate the prophylactic effect of Cymbopogon proximus and Alhagi maurorum on Sulfadimidine induced urolithiasis in rabbits . Thirty New Zealand male rabbits were allocated into six equal groups (each of five): Group (1) was used as a negative control. Group(2) were administered sulfadimidine (200mg/kg) by intramuscular injection.Groups(3) and (4) were administered sulfadimidine(200mg/kg) by intramuscular injection and 330mg/kg of Cymbopogon proximus alcoholic and aqueous extracts respectively orally.Groups(5) and (6) were administered sulfadimidine(200mg/kg) by intramuscular injection and 400mg/kg of Alhagi maurorum alcoholic and aqueous extracts respectively orally. The period of experiment was 10 days. Blood and urine samples were collected from rabbits on the 10th day. The results recorded a significant decrease in serum creatinine, urea, uric acid and crystalluria in Cymbopogon proximus and Alhagi maurorum groups compared to sulfadimidine treated group.We conclude that Cymbopogon proximus and Alhagi maurorum have a nephroprotective and antiurolithiatic effects against sulfadimidine induced crystalluria.

Influence of Removable Denture Cleaning Agents on Adhesion of Oral Pathogenic Microflora In Vitro: A Randomized Controlled Trial

2021 ◽  
Vol 14 (1) ◽  
pp. 656-664
Author(s):  
I.R. Volchkova ◽  
A.V. Yumashev ◽  
V.V. Borisov ◽  
V.I. Doroshina ◽  
E.A. Kristal ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Candida Albicans ◽  
Test Group ◽  
Control Group ◽  
Removable Dental Prostheses ◽  
Removable Denture ◽  
Group 2 ◽  
Adhesion Index ◽  
Group 1

Introduction: Removable dentures are used by 20% of the population. These may be accompanied by denture stomatitis in 15-70% of patients. The choice of the optimal cleansing agent for removable dental prostheses is of high significance. Aim: The aim of our research was to study the influence of removable denture cleansing products on the adhesion of microorganisms and yeast. Materials and Methods: We manufactured 144 specimens of standardized round shape with a diameter of 10 mm from 4 types of modern polymeric materials used by prosthetic dentistry to produce removable dentures, 12 specimens of each material were placed into suspensions of bacterial cultures of Staphylococcus aureus, Escherichia coli, Candida albicans, then into “ClearaSept” (Test group 1), “Рrotefix active cleanser” (Test group 2), saline solution (Control group), followed by nutrient media. The adhesion index was calculated and analyzed. Results: There was no reliable lowering of adhesion index of Staphylococcus Aureus to all materials detected in Test group 1 (U=6, p>0.05 for Bio XS; U=8, p>0.05 for Dental D, Denotokeep Peek, Vertex Rapid Simplified). In Test group 2, the adhesion index of Staphylococcus Aureus reliably decreased to all materials compared to the Control group (U=0, p≤0.01). The adhesion index of Candida albicans and Escherichia coli to all materials in Test group 1 had a minor to moderate reliable reduction compared to the Control group (U=0, p≤0.01). Test group 2 showed a significant reliable decrease in Candida albicans and Escherichia coli adhesion index to all materials in comparison with the Control group (U=0, p≤0.01). Conclusion: The research showed an unreliable or minor and moderate reliable decrease in microorganisms adhesion index depending on the microorganism species after treatment of denture material specimens by antibacterial soap “ClearaSept” and a reliable significant decrease in microbial and yeast adhesion after application of Protefix active cleaner solution, which demonstrates a more significant antimicrobial effect in comparison to “ClearaSept” against Staphylococcus aureus, Escherichia coli, and Candida albicans.

scholarly journals Effectiveness of lidocaine/prilocaine cream on cardiovascular reactions from endotracheal intubation and cough events during recovery period of older patients under general anesthesia: prospective, randomized placebo-controlled study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Linsheng Lv ◽  
Lei Yan ◽  
Xun Liu ◽  
Miaoxia Chen
Keyword(s):  
Blood Pressure ◽  
General Anesthesia ◽  
Older Patients ◽  
Recovery Period ◽  
Test Group ◽  
Control Group ◽  
Tube Cuff ◽  
Group 2 ◽  
Lidocaine Prilocaine ◽  
Cardiovascular Reactions

Abstract Background Endotracheal intubation is known to pose significant physiological, pharmacokinetic, and dynamic changes and postoperative respiratory complications in patients under general anesthesia. Method An RCT trial was organized by the Third Affiliated Hospital at Sun Yat-sen University, China. Patients were eligible for inclusion in the trial if they were over 60 years old and had upper-abdominal surgery during the induction of anesthesia and had enrolled in endotracheal intubations. The primary end point included cardiovascular reactions during the induction of anesthesia and endotracheal intubations and cough events during the recovery period. In the test group, 2 g of lidocaine/prilocaine cream (and in the control group, 2 g of Vaseline) were laid over the surface of the tracheal tube cuff. Results The systolic blood pressure (F value = 62.271, p < 0.001), diastolic blood pressure (F value = 150.875, p < 0.001), and heart rate (F value = 75.627, p < 0.001) of the test group were significantly lower than the control group. Cough events during the recovery period in the test group were better (spontaneous cough, χ2 value = 10.591, p < 0.001; induced cough, χ2 value =10.806, p < 0.001). Conclusion In older patients, coughing and cardiovascular reactions under anesthesia and endotracheal intubations were reduced, as a result of using lidocaine/prilocaine cream on the surface of the tracheal tube cuff. Trial registration International Clinical Trials Network NCT02017392, 2013-12-16.

Dopamine-1 receptor stimulation impairs intestinal oxygen utilization during critical hypoperfusion

2003 ◽  
Vol 284 (2) ◽  
pp. H668-H675 ◽  
Author(s):  
Jorge A. Guzman ◽  
Ariosto E. Rosado ◽  
James A. Kruse
Keyword(s):  
Blood Flow ◽  
Mucosal Blood Flow ◽  
Control Group ◽  
Oxygen Utilization ◽  
Hemorrhage Control ◽  
Receptor Stimulation ◽  
Anesthetized Dogs ◽  
Group 2 ◽  
Increased Susceptibility ◽  
Group 1

Effects of a dopamine-1 (DA-1) receptor agonist on systemic and intestinal oxygen delivery (D˙o 2)-uptake relationships were studied in anesthetized dogs during sequential hemorrhage. Control ( group 1) and experimental animals ( group 2) were treated similarly except for the addition of fenoldopam (1.0 μg · kg−1 · min−1) in group 2. Both groups had comparable systemic criticalD˙o 2(D˙o 2crit), but animals in group 2 had a higher gut D˙o 2crit(1.12 ± 1.13 vs. 0.80 ± 0.09 ml · kg−1 · min−1, P < 0.05). At the mucosal level, a clear biphasic delivery-uptake relationship was not observed in group 1; thus oxygen consumption by the mucosa may be supply dependent under physiological conditions. Group 2 demonstrated higher peak mucosal blood flow and lack of supply dependency at higher mucosalD˙o 2 levels. Fenoldopam resulted in a more conspicuous biphasic relationship at the mucosa and a rightward shift of overall splanchnic D˙o 2crit despite increased splanchnic blood flow. These findings suggest that DA-1 receptor stimulation results in increased gut perfusion heterogeneity and maldistribution of perfusion, resulting in increased susceptibility to ischemia.

Biomarkers of vascular wall damage in patients with cerebrovascular diseases and type 2 diabetes mellitus

2021 ◽  
Author(s):  
М.А. Быковская ◽  
А.А. Раскуражев ◽  
А.А. Шабалина ◽  
К.В. Антонова ◽  
М.М. Танашян
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Asymmetric Dimethylarginine ◽  
Vascular Wall ◽  
Cerebrovascular Diseases ◽  
Control Group ◽  
Normal Body Mass Index ◽  
Group 2 ◽  
Group 1

Введение. Сосудистые осложнения сахарного диабета (СД) являются одной из ведущих причин повышения смертности пациентов трудоспособного возраста. Предполагается, что индуцированный гипергликемией окислительный стресс и нарушение антиоксидантной защиты играют роль в патологическом механизме повреждения сосудов, частично за счет влияния оксида азота (NО). Цель исследования: уточнение взаимосвязей в системах асимметричного диметиларгинина (АДМА) и NO у пациентов с цереброваскулярными заболеваниями (ЦВЗ) на фоне СД 2-го типа (СД-2). Материалы и методы. Обследованы 72 пациента с ЦВЗ со стенозирующим поражением внутренней сонной артерии вне острого периода: группу 1 составили 39 пациентов (18 мужчин и 21 женщина) с СД-2 в возрасте 65 [58; 72] лет; в группу 2 вошли 33 больных (15 мужчин и 18 женщин) без СД-2 в возрасте 66 [56; 74] лет. Контрольную группу составили 30 добровольцев (16 мужчин и 14 женщин) без проявлений церебральной ишемии и нарушений углеводного обмена, с нормальными значениями индекса массы тела, некурящие, в возрасте 62 [50; 66] лет. Проводилось клиническое обследование, нейро- и ангиовизуализационное исследование, спектр биохимических исследований крови, в том числе определение содержания АДМА и показателей системы NO. Результаты. В группе 1 содержание нитрата, нитрита и NO составило 62,1 [56; 68] мкмоль/л, 48,5 [26; 52] мкмоль/л и 13,6 [9; 23] мкмоль/л соответственно, что достоверно отличалось от значений этих показателей в группе 2 — 58,3 [45; 64] мкмоль/л, 39,6 [26,0; 42,3] мкмоль/л и 18,7 [16,1; 24,7] мкмоль/л соответственно. Отмечен также более высокий уровень AДМА в крови у пациентов с ЦВЗ в сочетании с СД-2 — 0,42 [0,21; 0,53] ммоль/л. Заключение. Обнаружена взаимосвязь между уровнями AДМА и NO при ЦВЗ на фоне СД-2. Это требует продолжения исследований биомаркеров повреждения сосудистой стенки для определения их места в патогенезе ишемических церебральных осложнений СД-2. Background. Vascular complications of diabetes mellitus (DM) are one of the leading causes of increased mortality in patients of employable age. Hyperglycemia-induced oxidative stress and impaired antioxidant protection have been suggested to play a role in the pathological mechanism of vascular damage, in part due to the effects of nitric oxide (NO). Objectives: clarification of relationships in the systems of asymmetric dimethylarginine (ADMA) and NO in patients with cerebrovascular diseases (CVD) and type 2 diabetes (DM-2). Patients/Methods. We examined 72 CVD patients with stenosing lesions of the internal carotid artery outside the acute period: group 1 consisted of 39 patients (18 men and 21 women; 65 [58; 72] years old) with DM-2; group 2 consisted of 33 patients (15 men and 18 women; 66 [56; 74] years old) without DM-2. The control group consisted of 30 volunteers (16 men and 14 women; 62 [50; 66] years old) without manifestations of cerebral ischemia and carbohydrate metabolism disorders, with normal body mass index, non-smokers. A clinical examination, neuro- and angio-imaging study, a spectrum of biochemical blood tests, including the concentration of asymmetric dimethylarginine (ADMA) and indicators of NO system were carried out. Results. In group 1, the content of nitrate, nitrite and NO was 62.1 [56; 68] μmol/l, 48.5 [26; 52] μmol/l and 13.6 [9; 23] μmol/l, respectively, that significantly differed from the content of these parameters in group 2 — 58.3 [45; 64] μmol/l, 39.6 [26.0; 42.3] μmol/l and 18.7 [16.1; 24.7] μmol/l, respectively. Noted also a higher blood level of ADMA in patients with CVD combined with DM-2 — 0.42 [0.21; 0.53] mmol/l. Conclusions. A relationship was found between ADMA and NO levels in CVD patients with DM-2. This requires further studies of biomarkers of vascular wall damage to determine their place in the pathogenesis of ischemic cerebral complications of DM-2.

scholarly journals Objective assessment of stiffness in Achilles tendinopathy: a novel approach using the MyotonPRO

2018 ◽  
Vol 4 (1) ◽  
pp. e000446 ◽  
Author(s):  
Gafin Ericson Morgan ◽  
Rhodri Martin ◽  
Lisa Williams ◽  
Owen Pearce ◽  
Keith Morris
Keyword(s):  
Dynamic Stiffness ◽  
Objective Assessment ◽  
Weight Bearing ◽  
Achilles Tendinopathy ◽  
Control Group ◽  
Asymptomatic Group ◽  
Musculotendinous Junction ◽  
Significant Difference ◽  
Group 2 ◽  
Group 1

ObjectivesThe aim of this study was to establish quantitative values for asymptomatic and symptomatic Achilles tendons.DesignCohort study with a single (cross-sectional) time point of patients diagnosed with unilateral Achilles tendinopathy and an asymptomatic group with comparative homogeneity.MethodsA sample of 50 participants: 25 diagnosed with symptomatic unilateral Achilles tendinopathy (AT group) and 25 with asymptomatic Achilles tendons (control group 2). The asymptomatic side of the AT group was used as a control (control group 1). Measurements at 2 cm intervals on the tendon from its insertion at the calcaneum up to the musculotendinous junction were taken non-weight bearing (NWB) and weight bearing (WB) using the MyotonPRO.ResultsThere was a significant (p<0.005) decrease in natural oscillation frequency (F) at points 2, 3 and 4 of the AT group (NWB condition) and points 2 and 3 for the WB condition. There was a significant (p<0.005) increase in logarithmic decrement (D) at points 2 and 3 signifying a decrease in elasticity. Dynamic stiffness (S) was significantly (p<0.005) reduced in the AT group at points 2 and 3 WB and point 3 WB. There was no significant difference in creep (C) observed between the symptomatic and asymptomatic tendons. There was a significant (p<0.005) increase in mechanical stress relaxation time (R) at point 2 NWB.There was a correlation between body weight and gender on tendon mechanics, with the symptomatic tendons. No significant differences were observed between the control group 1 and control group 2.ConclusionsThe MyotonPRO measured decreased stiffness over a section of the tendon corresponding clinically with Achilles tendinopathy. This may have potential in identifying risk of injury and informing rehabilitation, however further extensive research is required to generate baseline data for specific population groups monitoring variables over time. Age, gender and body mass index appear to have some bearing on the mechanical properties of the tendon but mainly in the tendinopathy group.

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