A Na+,K+ co-transport assay for essential hypertension

1980 ◽  
Vol 58 (10) ◽  
pp. 1069-1074 ◽  
Author(s):  
Georges Dagher ◽  
Ricardo P. Garay
Keyword(s):  
Blood Pressure ◽  
High Blood Pressure ◽  
Secondary Hypertension ◽  
Kinetic Properties ◽  
Maximal Rate ◽  
Hypertensive Patients ◽  
Transport Assay ◽  
History Of ◽  
Family History Of Hypertension ◽  
Per Se

In erythrocytes from essential hypertensive patients and some of their normotensive offspring, the Na+,K+ co-transport system is unable to transport Na+ in an uphill direction against the electrochemical Na+ gradient. Recent studies of the kinetic properties of this system have permitted us to further characterize the abnormal co-transport in hypertension.Thirty-four essential hypertensive patients were characterized by a two-to three-fold decrease in the maximal rate of the outward Na+,K+ co-transport and a partial uncoupling of this system as compared with 22 normotensive controls. On the other hand, a normal co-transport was found in five secondary hypertensives with no family history of hypertension, thus indicating that the abnormal co-transport is not the consequence of high blood pressure per se. An abnormal co-transport was also found in around 50% of 19 young normotensives born of one hypertensive parent, suggesting genetic transmission.This study allows us to propose the use of a specific Na+,K+ co-transport assay for the differential diagnosis between essential and secondary hypertension and for the detection of those normotensives born of hypertensive parents with a potential risk to develop high blood pressure.

Intracellular Na+ and Ca2+ Activities in Essential Hypertension

1982 ◽  
Vol 63 (s8) ◽  
pp. 41s-43s ◽  
Author(s):  
W. Zidek ◽  
H. Vetter ◽  
K.-G. Dorst ◽  
H. Zumkley ◽  
H. Losse
Keyword(s):  
Essential Hypertension ◽  
Family History ◽  
Secondary Hypertension ◽  
Genetic Trait ◽  
Hypertensive Patients ◽  
Intracellular Na Activity ◽  
History Of ◽  
Family History Of Hypertension ◽  
Normotensive Subjects

1. The intracellular Na+ and Ca2+ activity and Na+ concentration were measured in erythrocytes of normotensive subjects, with and without a familial disposition to hypertension, in essential hypertensive patients with and without a family history of hypertension, and in patients with secondary hypertension. 2. In normotensive subjects without a genetic trait of hypertension intracellular Na+ activity and concentration were 7.00 ± 1.38 mmol/l and 5.67 ± 0.95 mmol/l respectively. The intracellular Ca2+ activity was 4.82 ± 4.49 μmol/l. In normotensive subjects with a familial hypertensive disposition intracellular Na+ activity and concentration were 9.74 ± 1.43 mmol/l (P < 0.01) and 6.63 ± 0.88 mmol/l (P < 0.05). Intracellular Ca2+ was 9.59 ± 9.71 μmol/l (P < 0.05). 3. Essential hypertensive patients without a familial genetic trait had an elevated intracellular Na+ activity (8.35 ± 2.08 mmol/l, P < 0.05). Intracellular Na+ concentration was 6.64 ± 0.79 mmol/l (P < 0.05). The intracellular Ca2+ activity was markedly elevated to 25.33 ± 19.03 μmol/l (P < 0.01). The essential hypertensive patients with a familial disposition had an elevated intracellular Na+ activity (17.19 ± 4.37 mmol/l, P < 0.001) and Ca2+ activity (32.8 ± 32.51 μmol/l, P < 0.01). The intracellular Na+ concentration was 6.25 ± 1.23 mmol/l. 4. The results indicate that in essential hypertension intracellular Na+ activity is increased, particularly in patients with a familial disposition for hypertension. Intracellular Ca2+ is increased in essential hypertension whether or not there was a family disposition to hypertension.

Increased Erythrocyte Lithium-Sodium Countertransport in Essential Hypertension: Its Relationship to Family History of Hypertension

1981 ◽  
Vol 61 (s7) ◽  
pp. 13s-15s ◽  
Author(s):  
M. Canali ◽  
L. Borghi ◽  
E. Sani ◽  
A. Curti ◽  
A. Montanari ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Essential Hypertension ◽  
Family History ◽  
High Blood Pressure ◽  
Degree Relative ◽  
Mean Values ◽  
The Family ◽  
History Of ◽  
Family History Of Hypertension ◽  
And Control

1. Erythrocyte lithium—sodium counter-transport was measured in 46 normotensive healthy controls without family history of hypertension, 15 subjects with essential hypertension, but without evidence of family history of high blood pressure, and 43 subjects with essential hypertension and at least one hypertensive first-degree relative. 2. Mean values (mmol h−1 l−1 of erythrocytes) were 0.248 ± 0.092 in controls, 0.258 ± 0.087 in hypertensive subjects without family history (not significant vs controls), 0.360 ± 0.115 in hypertensive subjects with family history of hypertension (P &lt; 0.001 vs controls), 0.334 ± 0.117 in all hypertensive subjects, both with and without family history (P &lt; 0.001 vs controls). 3. Our data confirm the finding of an increased erythrocyte lithium-sodium counter-transport, but with a significant overlap between essential hypertension and control values. Lithium-sodium countertransport is higher only in hypertensive subjects with at least one hypertensive first-degree relative. 4. We suggest that the increase of lithium-sodium countertransport in erythrocytes is not a consistent marker of essential hypertension. It seems to be associated with the family prevalence and/or the hereditability of hypertension, rather than with high blood pressure per se.

scholarly journals REPEATED HIGH BLOOD PRESSURE AT 6 AND 11 YEARS AT THE PELOTAS 2004 BIRTH COHORT STUDY

2019 ◽  
Author(s):  
Marilia Cruz Guttier ◽  
Raquel Siqueira Barcelos ◽  
Rodrigo Wiltgen Ferreira ◽  
Caroline Cardozo Bortolotto ◽  
William Dartora ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Blood Pressure ◽  
Family History ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Birth Cohort ◽  
High Blood Pressure ◽  
Z Scores ◽  
History Of ◽  
Family History Of Hypertension

Abstract Background: We evaluated the prevalence and the factors associated with repeated high systolic (SBP) and diastolic blood pressure (DBP) at 6- and 11-year follow-ups of children from the Pelotas (Brazil) 2004 Birth Cohort. Methods: All live births to mothers living in the urban area of Pelotas were enrolled in the cohort. Blood pressure (BP) values were transformed into Z-scores by sex, age, and height. High SBP and DBP were defined as repeated systolic and diastolic BP Z-scores on the ≥95 th percentile at the two follow-ups. Prevalence (95% confidence interval) of repeated high SBP, DBP, and both (SDBP) were calculated. Associations with maternal and child characteristics were explored in crude and adjusted logistic regression analyses. Results: A total of 3,182 cohort participants were analyzed. Prevalence of repeated high SBP, DBP and SDBP was 1.7% (1.2-2.1%), 2.3% (1.8-2.9%) and 1.2% (0.9-1.6%), respectively. Repeated high SBP was associated with males, gestational diabetes mellitus (2.92; 1.13-7.58) and obesity at 11 years (2.44; 1.29-4.59); while repeated high DBP was associated with females, family history of hypertension from both sides (3.95; 1.59-9.85) and gestational age <34 weeks (4.08; 1.52-10.96). Repeated high SDBP was not associated with any of the characteristics investigated . Conclusion: Prevalence of repeated high SBP, DBP, and SDBP were within the expected distribution at the population level. Nonetheless, gestational diabetes mellitus, obesity, family history of hypertension, and prematurity increased the risk of repeated high blood pressure measured at two occasions five years apart.

scholarly journals REPEATED HIGH BLOOD PRESSURE AT 6 AND 11 YEARS AT THE PELOTAS 2004 BIRTH COHORT STUDY

2019 ◽  
Author(s):  
Marilia Cruz Guttier ◽  
Raquel Siqueira Barcelos ◽  
Rodrigo Wiltgen Pereira ◽  
Caroline Cardozo Bortolotto ◽  
William Dartora ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Blood Pressure ◽  
Family History ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Birth Cohort ◽  
High Blood Pressure ◽  
Z Scores ◽  
History Of ◽  
Family History Of Hypertension

Abstract Background We evaluated the prevalence and the factors associated with repeated high systolic (SBP) and diastolic blood pressure (DBP) at 6- and 11-year follow-ups of children from the Pelotas (Brazil) 2004 Birth Cohort. Methods All live births to mothers living in the urban area of Pelotas were enrolled in the cohort. Blood pressure (BP) values were transformed into Z-scores according to sex, age and height. High SBP and DBP were defined as repeated systolic and diastolic BP Z-scores on the ≥95th percentile at the two follow-ups. Prevalence (95% confidence interval) of repeated high SBP, DBP and both (SDBP) were calculated. Associations with maternal and child characteristics were explored in crude and adjusted logistic regression analyses. Results 3182 cohort participants were analyzed. Prevalence of repeated high SBP, DBP and SDBP was 1.7% (1.2-2.1%), 2.3% (1.8-2.9%) and 1.2% (0.9-1.6%), respectively. Repeated high SBP was associated with male sex, gestational diabetes mellitus (2.92; 1.13-7.58) and obesity at 11 years (2.44; 1.29-4.59); while repeated high DBP was associated with female sex, family history of hypertension from both sides (3.95; 1.59-9.85) and gestational age <34 weeks (4.08; 1.52-10.96). Repeated high SDBP was not associated with any of the characteristcs investigated. Conclusion Prevalence of repeated high SBP, DBP and SDBP were within the expected distribution at the population level. Nonethless, gestational diabetes mellitus, obesity, family history of hypertension, and prematurity increased the risk of repeated high blood pressure measured at two occasions five years apart.

Relationship between Altered Na+–K+ Cotransport and Na+–Li+ Countertransport in the Erythrocytes of ‘essential’ Hypertensive Patients

1981 ◽  
Vol 61 (s7) ◽  
pp. 33s-36s ◽  
Author(s):  
D. Cusi ◽  
C. Barlassina ◽  
M. Ferrandi ◽  
P. Palazzi ◽  
E. Celega ◽  
...  
Keyword(s):  
Sodium Pump ◽  
Mean Value ◽  
Maximal Rate ◽  
Passive Permeability ◽  
Individual Values ◽  
Hypertensive Patients ◽  
History Of ◽  
Family History Of Hypertension ◽  
Normotensive Subjects ◽  
Sodium Extrusion

1. The maximal rate of activity of sodium extrusion by the sodium pump, Na+—K+ outward cotransport, passive permeability to sodium and potassium, Na+—Li+ countertransport, and passive permeability to lithium were measured in 45 essential hypertensive patients, 24 young normotensive subjects with at least one hypertensive parent and 24 normotensive subjects with both parents normotensive. 2. The maximal rate of activity of the sodium pump and the rate constants for passive permeability to sodium, potassium and lithium were similar in the three groups. 3. The mean value for Na+—K+ outward cotransport was significantly lower and that for Na+—Li+ countertransport significantly higher in the hypertensive patients than in the normotensive subjects without a family history of hypertension, but there was a great overlap between individual values. The offspring of hypertensive parents had intermediate values. 4. A highly significant positive correlation existed between Na+—K+ cotransport and Na+—Li+ countertransport both in the normotensive and in the hypertensive subjects, indicating that in the latter there were some with high Na+—Li+ countertransport and others with low Na+—K+ cotransport. 5. In nine hypertensive families studied, if an alteration of the transport system was detected in a hypertensive propositus, the same type of alteration was also found in his still normotensive offspring, thus indicating a familial tendency for the alteration to occur.

scholarly journals Repeated high blood pressure at 6 and 11 years at the Pelotas 2004 birth cohort study

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Marília Cruz Guttier ◽  
Raquel Siqueira Barcelos ◽  
Rodrigo Wiltgen Ferreira ◽  
Caroline Cardozo Bortolotto ◽  
William Jones Dartora ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Blood Pressure ◽  
Family History ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Birth Cohort ◽  
High Blood Pressure ◽  
Z Scores ◽  
History Of ◽  
Family History Of Hypertension

Abstract Background We evaluated the prevalence and the factors associated with repeated high systolic (SBP) and diastolic blood pressure (DBP) at 6- and 11-year follow-ups of children from the Pelotas (Brazil) 2004 Birth Cohort. Methods All live births to mothers living in the urban area of Pelotas were enrolled in the cohort. Blood pressure (BP) values were transformed into Z-scores by sex, age, and height. High SBP and DBP were defined as repeated systolic and diastolic BP Z-scores on the ≥95th percentile at the two follow-ups. Prevalence (95% confidence interval) of repeated high SBP, DBP, and both (SDBP) were calculated. Associations with maternal and child characteristics were explored in crude and adjusted logistic regression analyses. Results A total of 3182 cohort participants were analyzed. Prevalence of repeated high SBP, DBP and SDBP was 1.7% (1.2–2.1%), 2.3% (1.8–2.9%) and 1.2% (0.9–1.6%), respectively. Repeated high SBP was associated with males, gestational diabetes mellitus (2.92; 1.13–7.58) and obesity at 11 years (2.44; 1.29–4.59); while repeated high DBP was associated with females, family history of hypertension from both sides (3.95; 1.59–9.85) and gestational age < 34 weeks (4.08; 1.52–10.96). Repeated high SDBP was not associated with any of the characteristics investigated. Conclusion Prevalence of repeated high SBP, DBP, and SDBP were within the expected distribution at the population level. Nonetheless, gestational diabetes mellitus, obesity, family history of hypertension, and prematurity increased the risk of repeated high blood pressure measured at two occasions 5 years apart.

scholarly journals Repeated High Blood Pressure At 6 And 11 Years At The Pelotas 2004 Birth Cohort Study

2019 ◽  
Author(s):  
Marilia Cruz Guttier ◽  
Raquel Siqueira Barcelos ◽  
Rodrigo Wiltgen Ferreira ◽  
Caroline Cardozo Bortolotto ◽  
William Dartora ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Blood Pressure ◽  
Family History ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Birth Cohort ◽  
High Blood Pressure ◽  
Z Scores ◽  
History Of ◽  
Family History Of Hypertension

Abstract Background: We evaluated the prevalence and the factors associated with repeated high systolic (SBP) and diastolic blood pressure (DBP) at 6- and 11-year follow-ups of children from the Pelotas (Brazil) 2004 Birth Cohort. Methods: All live births to mothers living in the urban area of Pelotas were enrolled in the cohort. Blood pressure (BP) values were transformed into Z-scores by sex, age, and height. High SBP and DBP were defined as repeated systolic and diastolic BP Z-scores on the ≥95 th percentile at the two follow-ups. Prevalence (95% confidence interval) of repeated high SBP, DBP, and both (SDBP) were calculated. Associations with maternal and child characteristics were explored in crude and adjusted logistic regression analyses. Results: A total of 3,182 cohort participants were analyzed. Prevalence of repeated high SBP, DBP and SDBP was 1.7% (1.2-2.1%), 2.3% (1.8-2.9%) and 1.2% (0.9-1.6%), respectively. Repeated high SBP was associated with males, gestational diabetes mellitus (2.92; 1.13-7.58) and obesity at 11 years (2.44; 1.29-4.59); while repeated high DBP was associated with females, family history of hypertension from both sides (3.95; 1.59-9.85) and gestational age <34 weeks (4.08; 1.52-10.96). Repeated high SDBP was not associated with any of the characteristics investigated . Conclusion: Prevalence of repeated high SBP, DBP, and SDBP were within the expected distribution at the population level. Nonetheless, gestational diabetes mellitus, obesity, family history of hypertension, and prematurity increased the risk of repeated high blood pressure measured at two occasions five years apart.

scholarly journals The Correlation of Individual Factors with High Blood Pressure of Industrial Painters at a Land Transportation Manufacturing Company

2021 ◽  
Vol 13 (2) ◽  
pp. 85
Author(s):  
Emmanuella Dyca Novayanti ◽  
Benny Dwi Prasetyo
Keyword(s):  
Blood Pressure ◽  
Family History ◽  
Nutritional Status ◽  
High Blood Pressure ◽  
Lead Level ◽  
Blood Lead ◽  
Individual Factors ◽  
Caffeine Consumption ◽  
History Of ◽  
Family History Of Hypertension

Introduction: The use of lead-based paint in the manufacturing process on land transportation production contributed to the decline of ambient air quality. The amount of lead level in the painting area exceeded the allowed Threshold Limit Value (TLVs). Excessive lead exposure will provoke the escalation of blood lead levels. Even in a small amount, a lead will cause cardiovascular disorder inside the human's body and raise blood pressure. The research aims to analyze the correlation between environmental factors and individual factors of industrial painters with high blood pressure. Methods: The research used a quantitative method and a cross-sectional design. It involved the whole industrial painters and administration workers at the Internal Control Division. Samples were taken from 20 workers determined using simple random sampling. Independent variables were air lead level, age, healthy family history of hypertension, nutritional status, caffeine consumption, and smoking frequency. Dependent variables were blood lead level and blood pressure. The data obtained from laboratory tests and questionnaires were analyzed using Fisher's Exact Test. Results and Discussion: Correlations were proven to exist between lead level in the work environment and lead level inside the painters’ blood (p = 0.663). Family history of hypertension (p = 0.016) and nutritional status (p = 0.031) were correlated to the Blood Lead Levels (BLLs), whereas BLLs (p = 1.000), age (p = 0.158), caffeine consumption habit (p = 1.000), and smoking frequency (p= 0.663) were not correlated to the blood pressure. Conclusion: The work environment's lead level was correlated with BLLs but did no correlate with blood pressure. Family history of hypertension and nutritional status were the individual factors that correspond with high blood pressure in industrial painters.

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