Abstract:
:Arterial pressure is regulated over long periods of time by neural, hormonal and local control mechanisms, which ultimately determine the total blood volume and how it is distributed between the various vascular compartments of the circulation. A full understanding of the complex interplay of these mechanisms can be greatly facilitated by the use of mathematical models. In 1967, Guyton and Coleman published a model for long-term control of arterial pressure that focused on renal control of body sodium and water and thus total blood volume. The central point of their model is that the long-term level of arterial pressure is determined exclusively by the 'renal function curve', which relates arterial pressure to urinary excretion of salt and water. The contribution of the sympathetic nervous system to setting the long-term level of arterial pressure in the model is limited. In light of the overwhelming evidence for a major role of the sympathetic nervous system in long-term control of arterial pressure and the pathogenesis of hypertension, new mathematical models for long-term control of arterial pressure may be necessary. Despite the prominence and general acceptance of the Guyton-Coleman model in the field of hypertension research, we argue here that it overestimates the importance of renal control of body fluids and total blood volume in blood pressure regulation. Furthermore, we suggest that it is possible to construct an alternative model in which sympathetic nervous system activity plays an important role in long-term control of arterial pressure independent of its effects on total blood volume.
journal_name
Exp Physioljournal_title
Experimental physiologyauthors
Osborn JW,Averina VA,Fink GDdoi
10.1113/expphysiol.2008.043281subject
Has Abstractpub_date
2009-04-01 00:00:00pages
389-96issue
4eissn
0958-0670issn
1469-445Xpii
94/4/389journal_volume
94pub_type
杂志文章abstract::In this study we tested the hypothesis that, compared to young adult rats, senescent rats have a reduced ability to respond to muscle unloading. Unloading of the muscles was induced by hindlimb suspension (HS) of young adult and senescent rats for 21 days. Plantaris muscles from young adult rats had significantly high...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8602235
更新日期:2001-07-01 00:00:00
abstract::The hypotensive and vasorelaxing peptides adrenomedullin (AM) and its gene-related peptide, proadrenomedullin N-terminal 20 peptide (PAMP), were found to be distributed on the surface of the colonic mucosa. AM and PAMP showed dose-dependent antimicrobial activity against E. coli. The results suggest that the novel vas...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8602250
更新日期:2001-09-01 00:00:00
abstract::The renal medulla contains more mRNA of the inducible isoform of nitric oxide synthase (iNOS) than the cortex, which may be important in preventing ischaemic injury, since blood flow and tissue oxygen tension are normally low in this region. We examined the effects of the bacterial endotoxin E. coli lipopolysaccharide...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8702289
更新日期:2002-03-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? Is there sexual dimorphism in the occurrence of hepatic endoplasmic reticulum stress? What is the main finding and its importance? The transition from prepubertal to the adult age is associated with an increase in the unfolded protein response markers in the live...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP087518
更新日期:2019-05-01 00:00:00
abstract::The glucagon response to insulin-induced hypoglycaemia was tested in rats that had been pinealectomised (Px), pinealectomised and fitted with melatonin implants (Px + MLT), or sham-operated (SO). The glucagon response to hypoglycaemia observed in SO rats (216 +/- 27 pg x ml(-1) at baseline versus 397 +/- 35 pg x ml(-1...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8602205
更新日期:2001-09-01 00:00:00
abstract::A global and transient rise of intracellular Ca2+ (Ca2+i) is central to the operation of pump-leak coupling in the frog early distal tubule (EDT). The endoplasmic reticulum (ER) is the site of this Ca2+ release and reuptake; however, it is likely that other intracellular pools, such as mitochondria, also contribute to...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2004.028886
更新日期:2005-03-01 00:00:00
abstract::A video-laryngoscopic method, implemented with an algorithm for the correction of the deformation inherent in the endoscope optical system, has been used to measure the dorsoventral diameter (Drg) and the cross-sectional area (CSArg) of the rima glottidis in five healthy workhorses during conscious breathing at rest. ...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:
更新日期:1999-07-01 00:00:00
abstract::Recently attempts have been made to analyse blood pressure (BP) and renal sympathetic nerve activity (RSNA) to determine how patterns contained within them might reflect control by the autonomic nervous system. To date, these studies have primarily used coherence analysis of BP and RSNA in the frequency domain. Howeve...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1111/j.1469-445x.2002.tb00059.x
更新日期:2002-07-01 00:00:00
abstract::A recent model predicted a local synovial circulation of extravascular fluid in which capillary filtrate entered a joint cavity and fluid simultaneously drained out of the cavity via intercellular pathways distant from capillaries. Here, solutions of albumin (10-250 g l-1) were infused continuously into the knee joint...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1992.sp003613
更新日期:1992-05-01 00:00:00
abstract::Cessation of milk removal causes mammary tissue involution, which in rodents is characterized by extensive tissue degeneration and loss of the majority of luminal epithelial cells by apoptosis. In contrast, bovine mammary tissue shows little histological evidence of tissue remodelling between lactations. In this study...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1997.sp004075
更新日期:1997-09-01 00:00:00
abstract::Effects of altered maternal salt intake between 122 and 127 days gestation (term is 150 days) were studied in eight fetuses carried by ewes which had renal insufficiency caused by subtotal nephrectomy (STNxF) and seven fetuses carried by intact ewes (IntF). Plasma sodium and osmolality were increased in ewes with subt...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2007.039149
更新日期:2008-02-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? Our previous study demonstrates that elevated orexin 2 receptor (OX2R) activity within the rostral ventrolateral medulla (RVLM) contributes to hypertension in spontaneously hypertensive rats (SHRs), and a lower OX2R protein level was detected in their RVLM. The p...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP085016
更新日期:2015-09-01 00:00:00
abstract::The effects of the bacterial toxin Escherichia coli STa on electrogenic secretion in proximal, mid and distal rat colon were examined in vitro using the short-circuit current (Isc) as an index of secretion. All areas showed toxin-elevated Isc which was reduced by bumetanide. The proximal colon was the most sensitive (...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1991.sp003561
更新日期:1991-11-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? Exercise can stimulate brown adipose tissue (BAT) with subsequent increase in uncoupling protein 1 expression and mitochondrial biogenesis. In that case, do BAT-specific Hox genes modify BAT functioning and cause uncoupling protein expression changes due to exerc...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP089114
更新日期:2020-12-28 00:00:00
abstract::Exercise induces a marked increase in interleukin-8 (IL-8) mRNA and protein expression within skeletal muscle fibres. Interleukin-8 belongs to a subfamily of CXC chemokines containing a Glu-Leu-Arg (ELR) motif. CXC chemokines with ELR motifs are potent angiogenic factors in vivo, and IL-8 has been shown to act as an a...
journal_title:Experimental physiology
pub_type: 杂志文章,随机对照试验
doi:10.1113/expphysiol.2006.034769
更新日期:2007-01-01 00:00:00
abstract::It is unknown whether changes in corticomotor excitability follow prolonged exercise in healthy humans. Furthermore, the role of supraspinal fatigue in decrements of force production and voluntary activation following prolonged exercise has not been established. This study investigated peripheral and central fatigue a...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2006.035972
更新日期:2007-03-01 00:00:00
abstract::The objective of the experiments was to investigate the cellular basis of the inotropic effect on myocardium of several opioids which have been implicated in producing cardiotoxic effects in human poisoning. Opioids exerted negative inotropic effects, with half-maximal concentrations between 10 microM (dextropropoxyph...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1997.sp004021
更新日期:1997-03-01 00:00:00
abstract::The pattern of propagation of slow waves in the small intestine is not clear. Specifically, it is not known whether propagation is determined by a single dominant ICC-MP (Interstitial cells of Cajal located in the Myenteric Plexus) pacemaker unit or whether there are multiple active pacemakers. To determine this patte...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2007.039180
更新日期:2008-03-01 00:00:00
abstract::Very brief and intense exercise triggers a biphasic metabolic and respiratory response with a second phase that occurs after the cessation of the muscular activity. The effects on minute ventilation (V(E)) produced by manipulation of the peripheral circulation in metabolically active muscles could thus be studied with...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1111/j.1469-445x.2001.tb00041.x
更新日期:2001-11-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? Can targeted ablation of cardiac sympathetic neurons suppress myocardial infarction-induced adverse cardiac remodelling and left ventricular dysfunction? What is the main finding and its importance? Targeted ablation of cardiac sympathetic neurons significantly a...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP086928
更新日期:2018-09-01 00:00:00
abstract::Aldosterone influences the kidney's regulation of blood pressure (BP), but aldosterone can contribute to the pathogenesis of hypertension. Blood pressure is reduced with aerobic exercise training (AEX), but the extent to which plasma aldosterone (PA) levels change is unclear. The purpose of this study was to determine...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2007.037408
更新日期:2007-09-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? The central goal of this study was to elucidate the role of magnesium in the regulation of pulmonary vascular reactivity in relationship to hypoxic pulmonary hypertension. What is the main finding and its importance? We found that magnesium is essential for norma...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP086655
更新日期:2018-04-01 00:00:00
abstract::The aim of the present work was to investigate the role of the serotoninergic system in the control of sodium appetite of hypothyroid rats (HTR) by administering drugs that affect the serotoninergic activity, and to compare the same homeostatic behaviour in euthyroid rats (ETR) also given these drugs. Fenfluramine (FE...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/eph8802457
更新日期:2003-03-01 00:00:00
abstract::Rats were fed a liquid diet with the aim of decreasing nervous reflex activity in the parotid glands. In rats killed after 21 days on this diet the glands were atrophied and the total amounts of the neuropeptides, substance P, vasoactive intestinal peptide and calcitonin gene-related peptide, were lower than in contro...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1990.sp003435
更新日期:1990-07-01 00:00:00
abstract::The renin-angiotensin system is activated in the early phase of two-kidney, one-clip (2K-1C) hypertension. The paraventricular nucleus (PVN) integrates inputs regulating sympathetic outflow. The PVN receives inputs from plasma angiotensin II via projections from circumventricular organs and from renal afferent nerves ...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2009.051789
更新日期:2010-08-01 00:00:00
abstract::The effects of microinjections of adenosine and an adenosine receptor antagonist into the rostral ventrolateral medulla (RVLM) on the cardiovascular changes associated with the defence reaction were investigated in anaesthetized rats. Responses to electrical and chemical stimulation in RVLM were determined in alpha-ch...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1996.sp003919
更新日期:1996-01-01 00:00:00
abstract::Rat hippocampal neurones in primary culture exhibited directional growth in response to DC electric fields. Neurites lay perpendicular to the field after exposure to 28, 80 or 219 mV/mm but there was no orientation effect at 9 mV/mm or in unexposed control cultures. Fields that evoked perpendicular responses also redu...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1992.sp003580
更新日期:1992-01-01 00:00:00
abstract::The responses of afferent chemosensory fibres of the carotid body to individual chemostimuli have long been established. However, the mechanisms underlying the multiplicative interactions of these stimuli (i.e. how the combined effects of hypoxia and hypercapnia exert a greater effect on afferent nerve discharge than ...
journal_title:Experimental physiology
pub_type: 杂志文章,评审
doi:10.1113/expphysiol.2003.002657
更新日期:2004-01-01 00:00:00
abstract::The purpose of this study was to compare the kinetics of estimated capillary blood flow (Qcap) to those of femoral artery blood flow (QFA) and estimated muscle oxygen uptake (VO2m). Nine healthy subjects performed a series of transitions from rest to moderate (below estimated lactate threshold, 6 min bouts) knee exten...
journal_title:Experimental physiology
pub_type: 临床试验,杂志文章
doi:10.1113/expphysiol.2005.032904
更新日期:2006-07-01 00:00:00
abstract:NEW FINDINGS:What is the central question of this study? Dexmedetomidine has a capacity for sedation, anti-anxiety and analgesia with minimal suppression of respiratory function; what is its role in neuropathic pain and what is the involvement of miRNAs? What is the main finding and its importance? Dexmedetomidine atte...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/EP088596
更新日期:2020-09-01 00:00:00