Role of the Adventitia in Pulmonary Vascular Remodeling

Physiology ◽  
2006 ◽  
Vol 21 (2) ◽  
pp. 134-145 ◽  
Author(s):  
Kurt R. Stenmark ◽  
Neil Davie ◽  
Maria Frid ◽  
Evgenia Gerasimovskaya ◽  
Mita Das
Keyword(s):  
Vascular Function ◽  
Vessel Wall ◽  
Vascular Wall ◽  
Current Evidence ◽  
Wall Function ◽  
Response To Stress ◽  
Health And Disease ◽  
Adventitial Fibroblast ◽  
Structural Behaviors

An increasing volume of experimental data indicates that the adventitial fibroblast, in both the pulmonary and systemic circulations, is a critical regulator of vascular wall function in health and disease. A rapidly emerging concept is that the vascular adventitia acts as biological processing center for the retrieval, integration, storage, and release of key regulators of vessel wall function. In response to stress or injury, resident adventitial cells can be activated and reprogrammed to exhibit different functional and structural behaviors. In fact, under certain conditions, the adventitial compartment may be considered the principal injury-sensing tissue of the vessel wall. In response to vascular stresses such as overdistension and hypoxia, the adventitial fibroblast is activated and undergoes phenotypic changes, which include proliferation, differentiation, upregulation of contractile and extracellular matrix proteins, and release of factors that directly affect medial smooth muscle cell tone and growth and that stimulate recruitment of inflammatory and progenitor cells to the vessel wall. Each of these changes in fibroblast phenotype modulates either directly or indirectly changes in overall vascular function and structure. The purpose of this review is to present the current evidence demonstrating that the adventitial fibroblast acts as a key regulator of pulmonary vascular function and structure from the “outside-in.”

scholarly journals Arginine Derivatives in Cerebrovascular Diseases: Mechanisms and Clinical Implications

2020 ◽  
Vol 21 (5) ◽  
pp. 1798 ◽  
Author(s):  
Gerrit M. Grosse ◽  
Edzard Schwedhelm ◽  
Hans Worthmann ◽  
Chi-un Choe
Keyword(s):  
Ischemic Stroke ◽  
Vascular Function ◽  
Cerebrovascular Diseases ◽  
Current Evidence ◽  
Clinical Implications ◽  
Pathophysiological Role ◽  
Health And Disease ◽  
Oxide Synthase ◽  
Derivatives Of

The amino acid L-arginine serves as substrate for the nitric oxide synthase which is crucial in vascular function and disease. Derivatives of arginine, such as asymmetric (ADMA) and symmetric dimethylarginine (SDMA), are regarded as markers of endothelial dysfunction and have been implicated in vascular disorders. While there is a variety of studies consolidating ADMA as biomarker of cerebrovascular risk, morbidity and mortality, SDMA is currently emerging as an interesting metabolite with distinct characteristics in ischemic stroke. In contrast to dimethylarginines, homoarginine is inversely associated with adverse events and mortality in cerebrovascular diseases and might constitute a modifiable protective risk factor. This review aims to provide an overview of the current evidence for the pathophysiological role of arginine derivatives in cerebrovascular ischemic diseases. We discuss the complex mechanisms of arginine metabolism in health and disease and its potential clinical implications in diverse aspects of ischemic stroke.

Abnormalities in neuroendocrine stress response in psychosis: the role of endocannabinoids

2015 ◽  
Vol 46 (1) ◽  
pp. 27-45 ◽  
Author(s):  
E. Appiah-Kusi ◽  
E. Leyden ◽  
S. Parmar ◽  
V. Mondelli ◽  
P. McGuire ◽  
...  
Keyword(s):  
Stress Response ◽  
Hpa Axis ◽  
Psychotic Disorders ◽  
Endocannabinoid System ◽  
Current Evidence ◽  
Response To Stress ◽  
Health And Disease ◽  
Stress Response System ◽  
Precise Role

The aim of this article is to summarize current evidence regarding alterations in the neuroendocrine stress response system and endocannabinoid system and their relationship in psychotic disorders such as schizophrenia. Exposure to stress is linked to the development of a number of psychiatric disorders including psychosis. However, the precise role of stress in the development of psychosis and the possible mechanisms that might underlie this are not well understood. Recently the cannabinoid hypothesis of schizophrenia has emerged as a potential line of enquiry. Endocannabinoid levels are increased in patients with psychosis compared with healthy volunteers; furthermore, they increase in response to stress, which suggests another potential mechanism for how stress might be a causal factor in the development of psychosis. However, research regarding the links between stress and the endocannabinoid system is in its infancy. Evidence summarized here points to an alteration in the baseline tone and reactivity of the hypothalamic–pituitary–adrenal (HPA) axis as well as in various components of the endocannabinoid system in patients with psychosis. Moreover, the precise nature of the inter-relationship between these two systems is unclear in man, especially their biological relevance in the context of psychosis. Future studies need to simultaneously investigate HPA axis and endocannabinoid alterations both at baseline and following experimental perturbation in healthy individuals and those with psychosis to understand how they interact with each other in health and disease and obtain mechanistic insight as to their relevance to the pathophysiology of schizophrenia.

Immunology of the vessel wall

2017 ◽  
Author(s):  
Göran K. Hansson
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Vascular Disease ◽  
Vessel Wall ◽  
Vascular Diseases ◽  
Vascular Wall ◽  
Point Of View ◽  
Health And Disease ◽  
Inflammatory Vascular Disease

This chapter provides an overview of the vascular wall and its cells from an immunological point of view, discusses the capacity of vascular cells to promote and regulate immune responses, and outlines interactions between the vasculature and the immune system in health and disease. The role of immune mechanisms in vascular diseases is discussed, with a focus on atherosclerosis, a chronic inflammatory vascular disease.

scholarly journals Current Evidence for a Role of Neuropeptides in the Regulation of Autophagy

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Elisabetta Catalani ◽  
Clara De Palma ◽  
Cristiana Perrotta ◽  
Davide Cervia
Keyword(s):  
Molecular Mechanisms ◽  
Current Evidence ◽  
Pathological Conditions ◽  
Organ Systems ◽  
Intercellular Signalling ◽  
Physiological Homeostasis ◽  
Response To Stress ◽  
Autophagic Process ◽  
Regulatory Functions

Neuropeptides drive a wide diversity of biological actions and mediate multiple regulatory functions involving all organ systems. They modulate intercellular signalling in the central and peripheral nervous systems as well as the cross talk among nervous and endocrine systems. Indeed, neuropeptides can function as peptide hormones regulating physiological homeostasis (e.g., cognition, blood pressure, feeding behaviour, water balance, glucose metabolism, pain, and response to stress), neuroprotection, and immunomodulation. We aim here to describe the recent advances on the role exerted by neuropeptides in the control of autophagy and its molecular mechanisms since increasing evidence indicates that dysregulation of autophagic process is related to different pathological conditions, including neurodegeneration, metabolic disorders, and cancer.

scholarly journals The role of whey acidic protein four-disulfide-core proteins in respiratory health and disease

2017 ◽  
Vol 398 (4) ◽  
pp. 425-440 ◽  
Author(s):  
Donna M. Small ◽  
Declan F. Doherty ◽  
Caoifa M. Dougan ◽  
Sinéad Weldon ◽  
Clifford C. Taggart
Keyword(s):  
Protein Function ◽  
Respiratory Health ◽  
Whey Acidic Protein ◽  
Acidic Protein ◽  
Current Evidence ◽  
Core Proteins ◽  
Health And Disease ◽  
Low Molecular Weight Proteins ◽  
Potential Therapeutics

Abstract Members of the whey acidic protein (WAP) or WAP four-disulfide-core (WFDC) family of proteins are a relatively under-explored family of low molecular weight proteins. The two most prominent WFDC proteins, secretory leukocyte protease inhibitor (SLPI) and elafin (or the precursor, trappin-2), have been shown to possess multiple functions including anti-protease, anti-bacterial, anti-viral and anti-inflammatory properties. It is therefore of no surprise that both SLPI and elafin/trappin-2 have been developed as potential therapeutics. Given the abundance of SLPI and elafin/trappin-2 in the human lung, most work in the area of WFDC research has focused on the role of WFDC proteins in protecting the lung from proteolytic attack. In this review, we will outline the current evidence regarding the expanding role of WFDC protein function with a focus on WFDC activity in lung disease as well as emerging data regarding the function of some of the more recently described WFDC proteins.

scholarly journals Stress as a potential moderator of ovarian hormone influences on binge eating in women

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 222 ◽  
Author(s):  
Natasha Fowler ◽  
Phuong T. Vo ◽  
Cheryl L. Sisk ◽  
Kelly L. Klump
Keyword(s):  
Binge Eating ◽  
High Stress ◽  
Ovarian Hormones ◽  
Current Evidence ◽  
Ovarian Hormone ◽  
Moderating Effects ◽  
Response To Stress ◽  
Increased Sensitivity ◽  
As Stress

Previous research has demonstrated significant associations between increased levels of ovarian hormones and increased rates of binge eating (BE) in women. However, whereas all women experience fluctuations in ovarian hormones across the menstrual cycle, not all women binge eat in response to these fluctuations, suggesting that other factors must contribute. Stress is one potential contributing factor. Specifically, it may be that hormone-BE associations are stronger in women who experience high levels of stress, particularly as stress has been shown to be a precipitant to BE episodes in women. To date, no studies have directly examined stress as a moderator of hormone-BE associations, but indirect data (that is, associations between BE and stress and between ovarian hormones and stress) could provide initial clues about moderating effects. Given the above, the purpose of this narrative review was to evaluate these indirect data and their promise for understanding the role of stress in hormone-BE associations. Studies examining associations between all three phenotypes (that is, ovarian hormones, stress, and BE) in animals and humans were reviewed to provide the most thorough and up-to-date review of the literature on the potential moderating effects of stress on ovarian hormone–BE associations. Overall, current evidence suggests that associations between hormones and BE may be stronger in women with high stress levels, possibly via altered hypothalamic–pituitary–adrenal axis response to stress and increased sensitivity to and altered effects of ovarian hormones during stress. Additional studies are necessary to directly examine stress as a moderator of ovarian hormone–BE associations and identify the mechanisms underlying these effects.

Oxidative stress and endothelial dysfunction

2007 ◽  
Vol 27 (01) ◽  
pp. 5-12 ◽  
Author(s):  
G. Muller ◽  
C. Goettsch ◽  
H. Morawietz
Keyword(s):  
Oxidative Stress ◽  
Endothelial Dysfunction ◽  
Vascular Function ◽  
Vessel Wall ◽  
Clinical Implications ◽  
Oxygen Species ◽  
Vascular Oxidative Stress ◽  
Arteries And Veins ◽  
Different Sources

SummaryThis review focuses on the role of vascular oxidative stress in the development and progression of endothelial dysfunction. We discuss different sources of oxidative stress in the vessel wall, oxidative stress and coagulation, the role of oxidative stress and vascular function in arteries and veins, the flow-dependent regulation of reactive oxygen species, the putative impact of oxidative stress on atherosclerosis, the interaction of angiotensin II, oxidative stress and endothelial dysfunction, and clinical implications.

scholarly journals The hardness of the vessel wall in patients with arterial hypertension

2015 ◽  
Vol 12 (2) ◽  
pp. 43-48
Author(s):  
O D Ostroumova ◽  
A I Kochetkov ◽  
I I Kopchenov ◽  
T F Guseva ◽  
O V Bondarec
Keyword(s):  
Arterial Hypertension ◽  
Vessel Wall ◽  
Antihypertensive Drugs ◽  
Blood Pressure Level ◽  
Vascular Wall ◽  
Cardiovascular Complications ◽  
Increased Risk ◽  
The Status ◽  
The Difference

The article deals with the role of the hardness of the vessel wall in the pathogenesis of arterial hypertension and its complications and cardiovascular mortality. We discussed the factors increasing the hardness of the vessel wall, such as age, blood pressure level, atherosclerosis, smoking and diabetes mellitus. We showed the indicators reflecting the status of the vascular wall and which could play a role of markers of increased risk of cardiovascular complications. We reviewed the data concerning the improvement of the parameters of the hardness of the vessel wall under the influence of antihypertensive therapy using the angiotensin II type 1 receptor blocker - candesartan. We discussed the possible mechanisms of the candesartan influence on the elastic properties of the vessels. We stressed that the effect on the hardness of the arteries on using antihypertensive drugs, even within the same class, was different, which, apparently, was associated with the difference in the pharmacokinetic properties.

scholarly journals Evolving Concepts of Glycogen-Selective Autophagy

2021 ◽  
Author(s):  
Parisa Koutsifeli ◽  
Upasna Varma ◽  
Lorna Daniels ◽  
Marco Annandale ◽  
Xun Li ◽  
...  
Keyword(s):  
Degradation Pathway ◽  
Specific Protein ◽  
Current Evidence ◽  
Evolutionary Stage ◽  
Major Pathway ◽  
Selective Autophagy ◽  
Protein Partners ◽  
Health And Disease ◽  
Autophagy Pathway

Macro-autophagy is an essential cellular process involved in degradation of aberrant organelles and proteins. Initially proposed to be a ‘bulk’ degradation pathway, a more nuanced appreciation of selective autophagy pathways has emerged in recent years. The discovery of a glycogen-selective autophagy pathway (‘glycophagy’) has highlighted the importance of autophagy in regulating cellular metabolic homeostasis and identified a novel non-canonical major pathway of glycogen flux. The field of glycogen autophagy research is at an early evolutionary stage, but already it is clear that the implications of these discoveries are far-reaching and provide scope for multi-disciplinary investigations into the role of glycophagy in health and disease. With potential cognate protein partners identified, the opportunities for targeted intervention have become viable. Here we review the current evidence relating to specific protein mediators involved in glycophagy, and highlight areas of uncertainty that provide opportunity for further investigation.

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