Relationships between diurnal changes in blood pressure and catecholamines among Filipino‐American and European‐American women

Berge-Landry, Helene van; James, Gary D.; Brown, Daniel E.

doi:10.1002/ajhb.22383

Cited by 7 publications

(13 citation statements)

References 14 publications

(19 reference statements)

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“…Previous studies have shown that the BPs of African-American and Asian-American women decline proportionately less from waking environments to sleep than those of European-American women (Brown et al 2003, Van Berge-Landry et al 2013, van Berge-Landry et al, 2010) and the results in the present study generally confirm these findings. However, the results of both the proportional change and mean comparisons suggest that these groups also differ from Hispanic-American women in a similar pattern to European-American women.…”

Section: Discussionsupporting

confidence: 90%

“…The patterns and extent of circadian BP variability may also be affected by the person’s genetic and cultural background (James, 2007). There are numerous studies showing that BP declines proportionately less from waking environments to sleep among African-Americans than European Americans (Agyemanga et al 2005; van Berge-Landry et al, 2010); but, there are conflicting data regarding Asians and Asian-American comparisons with European-Americans, with some studies showing no difference with European groups (Agyemanga et al 2005) while others suggest that Asian-Americans decline proportionately less (Brown et al, 2003; van Berge Landry et al, 2013). To date, nearly all studies examining ethnic effects on circadian BP variation compare another ethnicity to a European group.…”

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confidence: 99%

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Ethnic differences in inter‐ and intra‐situational blood pressure variation: Comparisons among African‐American, Hispanic‐American, Asian‐American, and European‐American women

James

Bovbjerg

Hill

2016

American J Hum Biol

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Objectives The purpose of this study was to compare the daily inter- and intra-situational ambulatory blood pressure (BP) variation by ethnicity in women. Methods The African-American (N=82; Age=39.7+8.9), Hispanic-American (N=25; age=37.5+9.4), Asian-American (N=22; Age=35.2+8.6), and European-American (N=122; Age=37.2+ 9.4) women in this study all worked in similar positions at two major medical centers in NYC. Each wore an ambulatory monitor during the course of one mid-week workday. Proportional BP changes from work or home to sleep, intra-situational BP variation (standard deviation (SD)) and mean situational BP levels were compared among the groups using ANOVA models. Results African-American and Asian-American women had significantly smaller proportional work-sleep systolic changes than either European- (p<.05) or Hispanic-American (p<.05) women, but the Asian-American women’s changes tended to be smallest. The variability (SD) of diastolic BP at work was significantly greater among African- and Hispanic-American women compared to Asian- and European-American women (all p<.05). African-American women had greater sleep variability than European-American women (p<.05). Asian-American women had the highest level of sleep diastolic pressure (all comparisons p<.05). Conclusions African-American and Asian-American women have an attenuated proportional BP decline from waking environments to sleep compared to European-American and Hispanic-American women. Asian-American nocturnal BP may be elevated relative to all other groups.

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Section: Discussionsupporting

confidence: 90%

mentioning

confidence: 99%

Ethnic differences in inter‐ and intra‐situational blood pressure variation: Comparisons among African‐American, Hispanic‐American, Asian‐American, and European‐American women

James

Bovbjerg

Hill

2016

American J Hum Biol

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“…Another limitation relates to the use of urinary catecholamines as a surrogate for sympathetic activity . Yet, measurement of urinary catecholamines has been successfully applied to delineate altered sympathetic activity in various health conditions and ethnicities . Therefore, we are confident that the differences in NDRs of urinary catecholamines observed between dippers and nondippers in the present study do reflect real differences in sympathetic activity between these two study populations.…”

Section: Study Limitationsmentioning

confidence: 84%

Dipping in Ambulatory Blood Pressure Monitoring Correlates With Overnight Urinary Excretion of Catecholamines and Sodium

Därr

Bursztyn

Pamporaki

et al. 2016

J of Clinical Hypertension

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3Nondipping blood pressure (BP) is associated with increased morbidity and mortality. This study examines the relationship of "dipping" in 24-hour ambulatory BP monitoring (ABPM) with awake and sleeping urinary norepinephrine (NE) and epinephrine (EPI), and that of urinary NE and EPI with urinary sodium (UNa). Fifty nondippers and 65 dippers were included in the present study. Collected data included age, sex, body mass index, history of hypertension, current antihypertensive treatment, ABPM data, and NE, EPI, and UNa values. Hierarchical multiple regression analysis with the night-to-day ratio (NDR) of systolic BP as a dependent variable showed that the composite term of the NDRs of urinary NE and EPI was a significant predictor for dipping. Results also show a differential role of NE and EPI in circadian UNa excretion in dippers and nondippers. These results indicate that the sympathetic nervous system is involved in the regulation of circadian BP variations and UNa excretion. J Clin Hypertens (Greenwich). 2016;18:921-926. ª 2016 Wiley Periodicals, Inc.Ambulatory blood pressure (BP) monitoring (ABPM) may be used to identify diurnal variations in BP and to differentiate between so-called dippers, defined as individuals with a ≥10% decrease in systolic BP (SBP) during nighttime, and nondippers, defined as individuals who lack this fall in BP. 1,2Absence of the normal nocturnal fall in SBP is associated with increased morbidity and mortality, 3 and poses a substantial risk even after antihypertensive treatment. 4 Hence, restoration of the physiological circadian rhythm may be an aspect of crucial importance in the care of hypertensive patients independent of normalization of elevated BP values. 5The underlying mechanisms responsible for the normal fall in SBP, as well as its absence, are incompletely understood. Based on the seminal work of Guyton and colleagues, 6,7 who first drew attention to high urinary sodium (UNa) excretion in hypertensive individuals compared with normotensives, numerous studies have since established a prominent role of sodium balance for the maintenance of a normal circadian BP profile. 8-13On the other hand, a loss of circadian changes in BP and heart rate (HR) is common in conditions with persistent sympathetic-parasympathetic imbalance such as after traumatic brain injury.14 In addition, diminished nighttime decreases in systolic and diastolic BP are associated with blunted reductions of nocturnal HR in hypertensive patients, 15 and HR variability is reduced in patients with nondipping resistant hypertension. 16Therefore, an impaired sympathetic withdrawal during sleep might be another explanation for nondipping BP characteristics. 17,18The aim of the present study was to establish a possible relationship between diurnal variations in SBP as determined by 24-hour ABPM and changes in urinary catecholamine excretion in a population of normotensive and mildly (stage 1) hypertensive volunteers. We also measured UNa in order to find out whether there is a link between urinary catecholamine...

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“…This preservative has been widely used in field studies of urinary catecholamine variation over the last two decades (e.g., Harrison et al, 1981; James et al, 1985; Jenner et al, 1987; Pollard et al, 1996; Brown and James, 2000; Glover and Poland, 2002; James et al, 2004; Brown et al, 2006; Van Berge-Landry et al, 2013). The total volume of each sample was measured to the nearest milliliter and the length of time of the collection to the nearest minute.…”

Section: Methodsmentioning

confidence: 99%

“…Specifically, while numerous studies have shown that urinary catecholamine (epinephrine and norepinephrine) and cortisol as well as ambulatory blood pressure responses vary across and within daily microenvironments in a myriad of contexts (e.g. James, 1991a,b; 2013; Light et al, 1995; Luecken et al, 1997; James et al, 1993; 1996; 2004; 2008; Brown and James, 2000; Marco et al, 2000; Steptoe et al, 2000; James and Bovbjerg, 2001; Brown et al, 2006; Dettenborn et al, 2005; Van Berge Landry et al, 2008; 2010; 2013), none have evaluated whether the responses differ by parental history of hypertension. The purpose of this study was to evaluate whether the within-individual variation in urinary catecholamine (epinephrine and norepinephrine) and cortisol excretion, and ambulatory blood pressure (BP) across three daily microenvironments (work home and sleep) differed between healthy, normotensive women with and without a reported parental history of hypertension.…”

Section: Introductionmentioning

confidence: 99%

Differential circadian catecholamine and cortisol responses between healthy women with and without a parental history of hypertension

James

Alfarano

Berge-Landry

2014

American J Hum Biol

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Objectives Previous studies suggest that otherwise healthy individuals who have a parental history of hypertension (PH+) have an accentuated reactive rise in catecholamines and cortisol to laboratory stressors as well as elevated plasma levels when compared to those with no parental history (PH−); however, few if any studies have evaluated whether parental history affects the responses of these hormones to changing environmental circumstances in everyday life. The purpose of this study was to compare urinary catecholamine (epinephrine and norepinephrine) and cortisol excretion and ambulatory blood pressures across three daily microenvironments between women with and without a parental history of hypertension. Methods The women in the study (PH+, N=62, age=35.2±9.1; PH−,N=72, age=33.8±10.0) worked in clerical, technical or professional positions at a major medical center in NYC. Urinary hormone excretion rates and ambulatory BP were measured across three daily microenvironments: work (11AM–3PM), home (approx. 6PM–10PM) and during sleep (approx. 10PM– 6AM). History group comparisons by microenvironment were made using repeated measures ANCOVA and ANOVA analyses. Results The results show that epinephrine excretion among PH+ women was 36% higher than PH− women (p<.008) over the entire day, and that nocturnal cortisol excretion was also greater among PH+ women (p<.045). PH+ women also had statistically significantly higher systolic (4 mmHg higher; p<.01) and diastolic (2 mmHg higher, p<.03) BP compared to PH− women across all daily microenvironments. Conclusion These findings suggest that there may be genetically-linked mechanisms which elevate tonic epinephrine levels and nocturnal cortisol levels that contribute to elevating circadian blood pressure.

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Relationships between diurnal changes in blood pressure and catecholamines among Filipino‐American and European‐American women

Abstract: The relationships between diurnal BP and catecholamine variations differ by ethnicity. Further research is needed to better understand the mechanisms behind the differences and to evaluate whether this vascular tonic relationship has been the focus of natural selective processes.

Cited by 7 publications

References 14 publications

Ethnic differences in inter‐ and intra‐situational blood pressure variation: Comparisons among African‐American, Hispanic‐American, Asian‐American, and European‐American women

Ethnic differences in inter‐ and intra‐situational blood pressure variation: Comparisons among African‐American, Hispanic‐American, Asian‐American, and European‐American women

Dipping in Ambulatory Blood Pressure Monitoring Correlates With Overnight Urinary Excretion of Catecholamines and Sodium

Differential circadian catecholamine and cortisol responses between healthy women with and without a parental history of hypertension

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