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Vascular smooth muscle cells, aging

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https://www.readbyqxmd.com/read/29213245/implication-of-free-fatty-acids-in-thrombin-generation-and-fibrinolysis-in-vascular-inflammation-in-zucker-rats-and-evolution-with-aging
#1
Jérémy Lagrange, Mélusine Didelot, Amel Mohamadi, Lucy A Walton, Saartje Bloemen, Bas de Laat, Huguette Louis, Simon N Thornton, Brian Derby, Michael J Sherratt, Bruno Fève, Pascal Challande, Riaz Akhtar, J Kennedy Cruickshank, Patrick Lacolley, Véronique Regnault
Background: The metabolic syndrome (MetS) and aging are associated with modifications in blood coagulation factors, vascular inflammation, and increased risk of thrombosis. Objectives: Our aim was to determine concomitant changes in thrombin generation in the blood compartment and at the surface of vascular smooth muscle cells (VSMCs) and its interplay with adipokines, free fatty acids (FFA), and metalloproteinases (MMPs) in obese Zucker rats that share features of the human MetS. Methods: Obese and age-matched lean Zucker rats were compared at 25 and 80 weeks of age...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29211322/perivascular-adipose-tissue-and-the-dynamic-regulation-of-kv-7-and-kir-channels-implications-to-resistant-hypertension
#2
Maik Gollasch, Donald G Welsh, Rudolf Schubert
Resistant hypertension is defined as high blood pressure that remains uncontrolled despite treatment with at least three antihypertensive drugs at adequate doses. Resistant hypertension is an increasingly common clinical problem in older age, obesity, diabetes, sleep apnea, and chronic kidney disease. Although the direct vasodilator minoxidil was introduced in the early 1970s, only recently has this drug been shown to be particularly effective in a subgroup of patients with treatment-resistant or uncontrolled hypertension...
December 6, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/29203969/cardiovascular-disease-in-ageing-an-overview-on-thoracic-aortic-aneurysm-as-an-emerging-inflammatory-disease
#3
REVIEW
Calogera Pisano, Carmela Rita Balistreri, Alessandro Ricasoli, Giovanni Ruvolo
Medial degeneration associated with thoracic aortic aneurysm and acute aortic dissection was originally described by Erdheim as a noninflammatory lesion related to the loss of smooth muscle cells and elastic fibre fragmentation in the media. Recent evidences propose the strong role of a chronic immune/inflammatory process in aneurysm evocation and progression. The coexistence of inflammatory cells with markers of apoptotic vascular cell death in the media of ascending aorta with aneurysms and type A dissections raises the possibility that activated T cells and macrophages may contribute to the elimination of smooth muscle cells and degradation of the matrix...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29185213/carotid-artery-ligation-induced-intimal-thickening-and-proliferation-is-unaffected-by-ageing
#4
B A Brown, H Williams, A R Bond, G D Angelini, J L Johnson, S J George
Following interventions to treat atherosclerosis, such as coronary artery bypass graft surgery, restenosis occurs in approximately 40% of patients. Identification of proteins regulating intimal thickening could represent targets to prevent restenosis. Our group previously demonstrated that in a murine model of vascular occlusion, Wnt4 protein expression and β-catenin signalling was upregulated which promoted vascular smooth muscle cell (VSMC) proliferation and intimal thickening. In this study, the effect of age on VSMC proliferation, intimal hyperplasia and Wnt4 expression was investigated...
November 29, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29169155/rho-kinase-regulates-aortic-vascular-smooth-muscle-cell-stiffness-via-actin-srf-myocardin-in-hypertension
#5
Ning Zhou, Jia-Jye Lee, Shaunrick Stoll, Ben Ma, Kevin D Costa, Hongyu Qiu
BACKGROUND/AIMS: Our previous studies demonstrated that intrinsic aortic smooth muscle cell (VSMC) stiffening plays a pivotal role in aortic stiffening in aging and hypertension. However, the underlying molecular mechanisms remain largely unknown. We here hypothesized that Rho kinase (ROCK) acts as a novel mediator that regulates intrinsic VSMC mechanical properties through the serum response factor (SRF) /myocardin pathway and consequently regulates aortic stiffness and blood pressure in hypertension...
November 23, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29167120/acute-lysyl-oxidase-inhibition-alters-microvascular-function-in-normotensive-but-not-hypertensive-men-and-women
#6
Daniel H Craighead, Huilei Wang, Lakshmi Santhanam, Lacy M Alexander
The Lysyl oxidase (LOX) family of enzymes regulates collagen cross-linking. LOX is upregulated in hypertension, increasing vascular stiffness. In vivo human research is sparse as long-term LOX inhibition in animals causes vascular instability. Our aim was to evaluate the effects of LOX inhibition on cutaneous microvascular function to determine if LOX function was upregulated in hypertensive humans. Four intradermal microdialysis fibers were placed in the forearm of 10 young (age: 24±1 y, MAP: 87±2 mmHg), 10 normotensive (age: 50±2 y, MAP: 84±1 mmHg), and 10 hypertensive (age: 53±2 y, MAP 112±2 mmHg) subjects...
November 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29160796/role-of-galectin-3-in-bone-cell-differentiation-bone-pathophysiology-and-vascular-osteogenesis
#7
REVIEW
Carla Iacobini, Claudia Blasetti Fantauzzi, Giuseppe Pugliese, Stefano Menini
Galectin-3 is expressed in various tissues, including the bone, where it is considered a marker of chondrogenic and osteogenic cell lineages. Galectin-3 protein was found to be increased in the differentiated chondrocytes of the metaphyseal plate cartilage, where it favors chondrocyte survival and cartilage matrix mineralization. It was also shown to be highly expressed in differentiating osteoblasts and osteoclasts, in concomitance with expression of osteogenic markers and Runt-related transcription factor 2 and with the appearance of a mature phenotype...
November 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156421/impaired-mitochondrial-respiration-in-human-carotid-plaque-atherosclerosis-a-potential-role-for-pink1-in-vascular-smooth-muscle-cell-energetics
#8
Craig K Docherty, Andy Carswell, Elaine Friel, John R Mercer
BACKGROUND AND AIMS: DNA damage and mitochondrial dysfunction are thought to play an essential role in ageing and the energetic decline of vascular smooth muscle cells (VSMCs) essential for maintaining plaque integrity. We aimed to better understand VSMCs and identify potentially useful compensatory pathways that could extend their lifespan. Moreover, we wanted to assess if defects in mitochondrial respiration exist in human atherosclerotic plaques and to identify the appropriate markers that may reflect a switch in VSMC energy metabolism...
November 13, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29137225/circular-rna-expression-profile-and-potential-function-of-hsa_circrna_101238-in-human-thoracic-aortic-dissection
#9
Meisheng Zou, Chixiong Huang, Xinzhong Li, Xiang He, Yanmei Chen, Wangjun Liao, Yulin Liao, Jie Sun, Ze Liu, Lintao Zhong, Jianping Bin
Objective: To assess the circular RNAs (circRNAs) expression profile and explore the potential functions in human thoracic aortic dissection (TAD). Methods: The differentially expressed circRNAs profiles of the aortic segments between human type A TAD patients (n=3) and age-matched normal donors (NA; n=3) were analyzed using the Arraystar human circRNAs microarray. Quantitative real-time PCR was used to validate the expression pattern of circRNAs, parental genes, and hsa-miR-320a; Western blotting confirmed MMP9 expression with additional samples...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29128361/involvement-of-mitochondrial-fission-in-calcium-sensing-receptor-mediated-vascular-smooth-muscle-cell-proliferation-during-hypertension
#10
Xin Zhang, Wenjia Chen, Jiawen Li, Shuhan Qi, Siting Hong, Ying Wang, Lei Gao, Zhiyu Shi, Yue Liu, Wenxiu Liu, Yinyu Chi, Chunnan Liu, Yu Fu, Xinhua Yin
Hyperproliferation of vascular smooth muscle cells (VSMC) is a major risk factor for cardiovascular diseases. Proper mitochondrial fission and fusion is involved with VSMC function. However, the role and mechanism of mitochondrial morphological changes in VSMC proliferation are not well understood. Here, we found that calcium sensing receptor (CaSR) was increased in the aortas from spontaneous hypertensive rats (SHRs) compared with age-matched Wistar Kyoto (WKY) rats. There was also an increase in mitochondrial fission and VSMC proliferation, which was attenuated by Calhex231...
November 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29108502/colonic-adventitial-fibromuscular-dysplasia-a-nonspecific-arteriopathy-associated-with-hirschsprung-disease-and-other-obstructive-disorders
#11
Ameet I Thaker, Raj P Kapur
Background Smooth muscle differentiation ("adventitial fibromuscular dysplasia," AFD) was purported as specific to arteries in the transition zone of Hirschsprung disease (HSCR) patients. We investigated AFD in an HSCR population and controls and consider the pathogenesis and significance of the vascular pathology. Design Vascular histology in sections from colonic HSCR resections (n = 55) was compared with age- and site-matched controls with (n = 19) and without (n = 28) non-HSCR obstructive conditions...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/29107826/inhibition-of-vascular-smooth-muscle-cells-premature-senescence-with-rutin-attenuates-and-stabilizes-diabetic-atherosclerosis
#12
Yihui Li, Ranran Qin, Hongdan Yan, Feng Wang, Shanying Huang, Yun Zhang, Ming Zhong, Wei Zhang, Zhihao Wang
Atherosclerosis is an age-associated disease; however, diabetic atherosclerosis has higher severity beyond age range for accumulative premature senescent cells in diabetes. Recent findings suggest that rutin, a flavonoid, has potential benefits for diabetic individuals. This study was designed to evaluate the effects of rutin on premature senescence and atherosclerosis. Apolipoprotein E knockout mice exhibiting insulin resistance after 6 weeks of high-fat diet were administered with a low dose of streptozotocin (STZ) to induce diabetes...
September 28, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29106991/regulation-of-vascular-function-and-blood-pressure-by-circadian-variation-in-redox-signalling
#13
REVIEW
Glenn C Rodrigo, Karl E Herbert
There is accumulating evidence that makes the link between the circadian variation in blood pressure and circadian variations in vascular contraction. The importance of vascular endothelium-derived redox-active and redox-derived species in the signalling pathways involved in controlling vascular smooth muscle contraction are well known, and when linked to the circadian variations in the processes involved in generating these species, suggests a cellular mechanism for the circadian variations in blood pressure that links directly to the peripheral circadian clock...
October 26, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29080545/increased-serum-trem-1-level-is-associated-with-in-stent-restenosis-and-activation-of-trem-1-promotes-inflammation-proliferation-and-migration-in-vascular-smooth-muscle-cells
#14
Fang Wang, Chang Li, Feng Hua Ding, Ying Shen, Jie Gao, Zhu Hui Liu, Jia Wei Chen, Rui Yan Zhang, Wei Feng Shen, Xiao Qun Wang, Lin Lu
BACKGROUND AND AIMS: In-stent restenosis (ISR) remains a major limitation of percutaneous coronary intervention despite improvements in stent design and pharmacological agents, whereas the mechanism of ISR has not been fully clarified. In the present study, we sought to investigate the potential association of serum soluble TREM-1 (sTREM-1) levels with the incidence of ISR. The role of TREM-1 was evaluated in cultured vascular smooth muscle cells (VSMCs). METHODS: Out of 1683 patients undergoing coronary intervention and follow-up coronary angiography after approximately one year, 130 patients were diagnosed with ISR, and 150 gender- and age-matched patients with no ISR were randomly included as controls...
October 14, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29079564/attenuated-superoxide-dismutase-2-activity-induces-atherosclerotic-plaque-instability-during-aging-in-hyperlipidemic-mice
#15
Aleksandr E Vendrov, Mark D Stevenson, Samthosh Alahari, Hua Pan, Samuel A Wickline, Nageswara R Madamanchi, Marschall S Runge
BACKGROUND: Atherosclerosis progression during aging culminates in the development of vulnerable plaques, which may increase the risk of cardiovascular events. Increased generation and/or decreased scavenging of reactive oxygen species in the vascular wall are major contributors to atherogenesis. We previously showed that superoxide dismutase 2 deficiency increased vascular oxidative stress and reduced aortic compliance in aged wild-type mice and that young Apoe(-/-)/Sod2(+/-) had increased mitochondrial DNA damage and atherosclerosis versus young Apoe(-/-) mice...
October 27, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29072489/effects-of-losartan-on-vasomotor-function-and-canonical-transient-receptor-potential-channels-in-the-aortas-of-sinoaortic-denervation-rats
#16
Minlie Liang, Wenliang Zhong, Fei Miao, Hongchao Wu, Yingfeng Liu
Increased short-term blood pressure variability (BPV) is strongly correlated with target organ damage. However, the molecular mechanisms underlying abnormal BPV-induced organ damage and effective therapeutic targets are poorly understood. The purpose of this study was to investigate the effects of losartan on vasomotor function and canonical transient receptor potential (TRPC) channels in the aortas of rats with arterial pressure lability induced by sinoaortic denervation (SAD). SAD was performed in male Sprague-Dawley rats at the age of 10 weeks...
October 26, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29045235/the-aqueous-tuber-extract-of-pueraria-tuberosa-willd-d-c-caused-cytotoxic-effect-on-ht-29-cell-lines-with-down-regulation-of-nuclear-factor-kappa-b-nf-%C3%AE%C2%BAb
#17
Adeolu Alex Adedapo, Olusegun A Fagbohun, Christianah Dawurung, Ademola Adetokunbo Oyagbemi, Temidayo Olutayo Omobowale, Momoh Audu Yakubu
Background Pueraria tuberosa (Willd) D.C. (Fabaceae) tubers are already used in traditional medicine by Ayurvedic physicians for the management of fertility disorders, general weakness, and also as anti-ageing therapies. Other known pharmacological properties include: anti-hyperglycemics, hepatoprotective, anti-hyperlipidemic, diuretic, nutritive, and anti-fertility agents in male rats. Methods The anti-proliferative effect of the aqueous tuberous root extract of Pueraria tuberosa on vascular smooth muscle cells (VSMCs) and Human Colorectal Adenocarcinoma Cell lines (HT-29) was investigated using the Cell Titer 96 MTT Proliferation Assay where the viable cells were seeded at a density of 5 × 104 (100 µL/well)...
October 18, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28976370/-what-is-aging-and-cardiovascular-aging
#18
Z Lale Koldaş
Aging is one of the main risk factors for cardiovascular disease (CVD) and results in a progressive functional decline of organs and the vasculature. According to WHO data today, 8.5 percent of people worldwide (617 million) are aged 65 and over, this percentage is projected to jump to nearly 17 percent of the world's population by 2050 (1.6 billion). Turkey's 65-and- over population rise over the last 5 years about 17,1% and it is estimated that the percentage of this elderly population will rise from 8.5% (2016 data) to 20,8% in the year 2050...
September 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28974341/bubr1-insufficiency-impairs-angiogenesis-in-aging-and-in-experimental-critical-limb-ischemic-mice
#19
Jun Okadome, Takuya Matsumoto, Keiji Yoshiya, Daisuke Matsuda, Kouji Tamada, Mitsuho Onimaru, Kaku Nakano, Kensuke Egashira, Yoshikazu Yonemitsu, Yoshihiko Maehara
OBJECTIVES: Budding uninhibited by benzimidazole-related 1 (BubR1), a cell cycle-related protein, is an essential component of the spindle checkpoint that regulates cell division. Mice in which BubR1 expression is reduced to 10% of the normal level display the phenotypic features of progeria. However, the role of BubR1 in vascular diseases and angiogenesis remains unknown. To investigate the influence of BubR1 on angiogenesis, we generated a low-null-BubR1-expressing (BubR1L/-) mouse strain with reduced BubR1 expression as low as 15% of the normal level without any abnormalities in appearance...
September 30, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28966336/mechanism-of-development-of-atherosclerosis-and-cardiovascular-disease-in-diabetes-mellitus
#20
Naoto Katakami
Diabetic macroangiopathy, atherosclerosis secondary to diabetes mellitus (DM), causes cerebro-cardiovascular diseases, which are major causes of death in patients with DM and significantly reduce their quality of life. The alterations in vascular homeostasis due to endothelial and vascular smooth muscle cell dysfunction are the main features of diabetic macroangiopathy. Although multiple metabolic abnormalities that characterize diabetes are involved in the progression of atherosclerosis in patients with DM, it may be said that prolonged exposure to hyperglycemia and insulin resistance clustering with other risk factors such as obesity, arterial hypertension, and dyslipidemia play crucial roles...
September 29, 2017: Journal of Atherosclerosis and Thrombosis
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