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Carotid body

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https://www.readbyqxmd.com/read/29336842/immunohistochemical-localization-of-angiotensin-at1-receptors-in-the-rat-carotid-body
#1
Dimitrinka Y Atanasova, Angel D Dandov, Nikolay D Dimitrov, Nikolai E Lazarov
The carotid body (CB) is a major peripheral arterial chemoreceptor that initiates respiratory and cardiovascular adjustments to maintain homeostasis. Recent evidence suggests that circulating or locally produced hormones like angiotensin II acting via AT1 receptors modulate its activity in a paracrine-autocrine manner. The aim of this study was to examine the immunohistochemical localization of AT1 receptor in the CB of adult rats and to compare its expression in vehicle-treated animals, and after the long-term application of its selective blocker losartan...
January 12, 2018: Acta Histochemica
https://www.readbyqxmd.com/read/29335248/fast-neurogenesis-from-carotid-body-quiescent-neuroblasts-accelerates-adaptation-to-hypoxia
#2
Verónica Sobrino, Patricia González-Rodríguez, Valentina Annese, José López-Barneo, Ricardo Pardal
Unlike other neural peripheral organs, the adult carotid body (CB) has a remarkable structural plasticity, as it grows during acclimatization to hypoxia. The CB contains neural stem cells that can differentiate into oxygen-sensitive glomus cells. However, an extended view is that, unlike other catecholaminergic cells of the same lineage (sympathetic neurons or chromaffin cells), glomus cells can divide and thus contribute to CB hypertrophy. Here, we show that O2-sensitive mature glomus cells are post-mitotic...
January 15, 2018: EMBO Reports
https://www.readbyqxmd.com/read/29334265/prevalence-and-covariates-of-uncontrolled-hypertension-in-ischemic-stroke-survivors-the-norwegian-stroke-in-the-young-study
#3
Åshild Oftedal, Eva Gerdts, Ulrike Waje-Andreassen, Annette Fromm, Halvor Naess, Anja Linde, Sahrai Saeed
PURPOSE: Hypertension is the most important modifiable risk factor for stroke. Few data are available on control of hypertension in younger ischemic stroke survivors. MATERIAL AND METHODS: We assessed clinic and ambulatory blood pressure (BP) measurements in 320 patients aged 15-60 years (mean 48 ± 10) included in the Norwegian Stroke in the Young Study during 3-months follow-up after the index stroke. Controlled hypertension was defined as ambulatory BP <130/80 mmHg...
January 15, 2018: Blood Pressure
https://www.readbyqxmd.com/read/29330798/immunohistochemistry-of-the-carotid-body
#4
Jayasri Nanduri, Nanduri R Prabhakar
Immunohistochemistry (IHC) enables the detection and distribution of proteins in cells of tissues. IHC has become an indispensable approach for studying oxygen sensing by the carotid body (CB). This chapter provides a detailed description of IHC of CB tissue and isolated CB cells.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330797/testing-acute-oxygen-sensing-in-genetically-modified-mice-plethysmography-and-amperometry
#5
Patricia Ortega-Sáenz, Candela Caballero, Lin Gao, José López-Barneo
Monitoring responsiveness to acute hypoxia of whole animals and single cells is essential to investigate the nature of the mechanisms underlying oxygen (O2) sensing. Here we describe the protocols followed in our laboratory to evaluate the ventilatory response to hypoxia in normal and genetically modified animals. We also describe the amperometric technique used to monitor single-cell catecholamine release from chemoreceptor cells in carotid body and adrenal medulla slices.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330796/monitoring-functional-responses-to-hypoxia-in-single-carotid-body-cells
#6
Ana María Muñoz-Cabello, Hortensia Torres-Torrelo, Ignacio Arias-Mayenco, Patricia Ortega-Sáenz, José López-Barneo
The carotid body is the main arterial chemoreceptor in mammals that mediates the cardiorespiratory reflexes activated by acute hypoxia. Here we describe the protocols followed in our laboratory to study responsiveness to hypoxia of single, enzymatically dispersed, glomus cells monitored by microfluorimetry and the patch-clamp technique.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330795/measurement-of-sensory-nerve-activity-from-the-carotid-body
#7
Ying-Jie Peng, Nanduri R Prabhakar
Carotid bodies are sensory organs for monitoring chemical composition of the arterial blood, especially the O2 levels. Carotid bodies are located bilaterally at the bifurcation of the common carotid artery. Hypoxia increases sensory nerve activity of the carotid body, which is transmitted to the brainstem neurons triggering reflex stimulation of breathing and blood pressure. Measurement of action potentials from the carotid sinus nerve is a widely used approach for understanding the mechanisms of hypoxic sensing by the carotid body...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29329827/effect-of-serum-adiponectin-levels-on-the-association-between-childhood-body-mass-index-and-adulthood-carotid-intima-media-thickness
#8
Yang Du, Tao Zhang, Dianjianyi Sun, Changwei Li, Lydia Bazzano, Lu Qi, Marie Krousel-Wood, Jiang He, Paul K Whelton, Wei Chen, Shengxu Li
Childhood obesity predicts adult cardiovascular risk. We hypothesized that the association between childhood body mass index (BMI) and adult carotid intima-media thickness (CIMT) may be modified by levels of adiponectin, an adipocytokine that connects body fatness with cardiovascular risk. The study sample included 1,052 adults (71% white and 29% black, 57% female) aged 23.8 to 43.5 years who were previously examined as children in the Bogalusa Heart Study cohort, with an average follow-up period of 26.5 (range 14...
December 12, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29328847/an-anaesthesia-perspective-on-carotid-body-tumour-cbt-excision-a-twenty-year-case-series-at-the-singapore-general-hospital
#9
Deanna Wj Ng, Chris I Yam, Loong T Wong, Darren Lk Koh
Carotid body tumours (CBT) are extremely rare neoplasms that arise from chemoreceptor cells at the bifurcation of the carotid artery. This rarity poses a challenge for the anaesthetist when dealing with surgeries for the removal of CBT. Reports of associated perioperative morbidity range from twenty to forty percent. This paper reviews the perioperative anaesthetic management of CBT patients and challenges in our institution's 20 year experience on 13 surgical CBT resections.
October 2017: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29325542/visceral-adipose-tissue-and-carotid-intima-media-thickness-in-hiv-infected-patients-undergoing-cart-a-prospective-cohort-study
#10
Maria Teresa Beires, André Silva-Pinto, Ana Cristina Santos, António José Madureira, Jorge Pereira, Davide Carvalho, António Sarmento, Paula Freitas
BACKGROUND: Combined antiretroviral therapy (cART) in HIV-infected patients has been associated with lipodystrophy, metabolic abnormalities, and an increased risk of cardiovascular disease. Ultrasound measures of carotid artery intima-media thickness (cIMT) have been used as a valid measure of subclinical atherosclerosis and as a tool to predict the risk of cardiovascular events. Our aim was to evaluate the progression of cIMT in HIV-infected patients subjected to cART, with and without lipodystrophy, over a one-year period...
January 11, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29325370/-association-between-carotid-artery-plaques-and-all-cause-mortality-and-cardiovascular-events
#11
W Li, F Ma, Y M Jiang, J J Li, L Song, S H Chen, X M Liu, X Q Li, S L Wu
Objective: To observe the association of carotid artery plaque with all-cause mortality and cardiovascular events. Methods: A total of 7 017 participants who completed the carotid sonography examination between 2010 and 2011 were selected from the stroke and the elderly prospective cohort Kailuan study. The participants of stroke cohort received health examination between 2006 and 2007, and participants of elderly cohort received health examination between 2010 and 2011. All participants were divided into plaque group (3 285 cases) and without plaque group (3 732 cases) according to with or without carotid artery plaque...
December 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29322981/expansile-manubriotomy-for-ventral-cervicothoracic-junction-disease
#12
Sudhir Dubey, Amit Agrawal
Cervicothoracic junction can be approached anteriorly, anterolaterally, posterolaterally, and posteriorly. The anterior approaches in this region best address the ventral vertebral body disease but may cause significant morbidity. Twelve patients with their disease process located ventral to the spinal cord in the cervicothoracic junction underwent expansile manubriotomy and corpectomy. Eleven patients underwent fusion. One patient underwent an oblique corpectomy. All patients had their disease process from T1 to T3 vertebral levels...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29320547/dyslipidemia-chronic-inflammation-and-subclinical-atherosclerosis-in-children-and-adolescents-infected-with-hiv-the-posithive-health-study
#13
Luiz Rodrigo Augustemak de Lima, Edio Luiz Petroski, Yara Maria Franco Moreno, Diego Augusto Santos Silva, Erasmo Benício de Moraes Santos Trindade, Aroldo Prohmann de Carvalho, Isabela de Carlos Back
HIV-infected children and adolescents may be at risk for cardiovascular disease due to chronic inflammation and exacerbation of risk factors. The aim of this study was as follows: 1) compare cardiovascular risk factors, chronic inflammation, and carotid intima-media thickness (IMTc) between the HIV and control groups; 2) determine the association of HIV and antiretroviral (ART) regimens with cardiovascular risk factors, chronic inflammation, and IMTc; and 3) identify variables associated with elevated IMTc...
2018: PloS One
https://www.readbyqxmd.com/read/29319194/aging-of-the-carotid-body
#14
Camillo Di Giulio
The aging process is characterized by a decline in several physiological functions resulting in a reduced capability to maintain homeostasis. The lowered homeostatic capacity seems to involve the carotid body (CB), whose role is to modulate ventilation and tissue oxygen supply, thus playing a prime role in all aging processes. Aging causes marked changes in CB morphology. Indeed, it is enlarged and shows a concomitant decrease in the percentage of chemoreceptor tissue, as well as a proliferation of Type II cells...
January 10, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29313987/variable-role-of-carotid-bodies-in-cardiovascular-responses-to-exercise-hypoxia-and-hypercapnia-in-spontaneously-hypertensive-rats
#15
Wioletta Pijacka, Pedro L Katayama, Helio C Salgado, Gisele S Lincevicius, Ruy R Campos, Fiona D McBryde, Julian F R Paton
The carotid body has recently emerged as a promising therapeutic target for treating cardiovascular disease, however the potential impact of carotid bodies removal on the dynamic cardiovascular responses to acute stressors such as exercise, hypoxia and hypercapnia in hypertension is an important safety consideration that has not been studied. We first validated a novel surgical approach to selectively resect the carotid bodies bilaterally (CBR) sparing the carotid sinus baroreflex. Second, we evaluated the impact of CBR on the cardiovascular responses to exercise, hypoxia and hypercapnia in the conscious, chronically instrumented spontaneously hypertensive (SH) rats...
January 5, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29309514/follicle-stimulating-hormone-levels-and-subclinical-atherosclerosis-in-older-postmenopausal-women
#16
Elizabeth R Bertone-Johnson, Jyrki K Virtanen, Tarja Nurmi, Leo Niskanen, Jaakko Mursu, Sari Voutilainen, Kimmo Ronkainen, Jussi Kauhanen, Tomi-Pekka Tuomainen
Recent studies of perimenopausal women suggest that follicle-stimulating hormone (FSH) levels may be associated with atherosclerosis, independent of estradiol. Whether FSH is related to atherosclerosis in older postmenopausal women, who have completed the menopausal transition, remains unknown. We assessed the relationship of serum FSH and estradiol levels with carotid artery intima-media thickness (IMT) among 587 postmenopausal participants in the Kuopio Ischemic Heart Disease Risk Factor Study (Kuopio, Finland)...
January 1, 2018: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29306901/cardiometabolic-health-among-adult-offspring-of-hypertensive-pregnancies-the-cardiovascular-risk-in-young-finns-study
#17
Robyn J Tapp, Alun D Hughes, Mika Kähönen, Tien Yin Wong, Nicholas Witt, Terho Lehtimäki, Nina Hutri-Kähönen, Pinki Sahota, Markus Juonala, Olli T Raitakari
BACKGROUND: Cardiometabolic health among adult offspring of hypertensive disorders of pregnancy (HDP) is relatively unknown. We hypothesized that offspring of HDP would have abnormalities in the retinal microvasculature and cardiac structure by midadulthood. METHODS AND RESULTS: The Cardiovascular Risk in Young Finns Study included randomly selected children from 5 Finnish university cities. The mean age of participants was 40 years (range 34-49 years) at the time of retinal photography and cardiac assessment...
January 6, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29306892/association-of-body-flexibility-and-carotid-atherosclerosis-in-japanese-middle-aged-men-a-cross-sectional-study
#18
Masataka Suwa, Takayuki Imoto, Akira Kida, Takashi Yokochi, Mitsunori Iwase, Kenji Kozawa
OBJECTIVE: This study examined the associations of body flexibility with carotid arterial remodelling, including intima-media thickness (IMT) and plaque formation in middle-aged men. METHODS: The subjects of this cross-sectional study included 1354 Japanese men aged 35-59 years without histories of stroke or cardiac diseases. The arm extensibility test, which can estimate flexibility of the upper extremity (composed of shoulder external rotation and forearm supination), and the sit-and-reach test were performed...
January 5, 2018: BMJ Open
https://www.readbyqxmd.com/read/29304064/hyperleptinemia-positively-associated-with-central-arterial-stiffness-in-hemodialysis-patients
#19
Chiu-Huang Kuo, Yu-Li Lin, Chung-Jen Lee, Chih-Hsien Wang, Yu-Hsien Lai, Hung-Hsiang Liou, Bang-Gee Hsu
OBJECTIVE: Leptin plays a role in stimulating vascular inflammation, vascular smooth muscle hypertrophy, and augmenting blood pressure, which contributes to the pathogenesis of atherosclerosis and leads to arterial stiffness. This vascular damage, measured by carotid-femoral pulse wave velocity (cfPWV), is recognized as an independent predictor of cardiovascular mortality in hemodialysis (HD) patients. The aim of this study was to evaluate the relationship between serum leptin and arterial stiffness in HD patients...
2018: PloS One
https://www.readbyqxmd.com/read/29303699/implication-of-osteoprotegerin-and-sclerostin-in-axial-spondyloarthritis-cardiovascular-disease-study-of-163-spanish-patients
#20
Fernanda Genre, Javier Rueda-Gotor, Sara Remuzgo-Martínez, Alfonso Corrales, Begoña Ubilla, Verónica Mijares, Carlos Fernández-Díaz, Virginia Portilla, Ricardo Blanco, José Luis Hernández, Javier Llorca, Raquel López-Mejías, Miguel Angel González-Gay
OBJECTIVES: Due to the high incidence of cardiovascular disease in axial spondyloarthritis (axSpA), the search of potential biomarkers that may help to identify patients with high cardiovascular risk is of main importance. Therefore, in this study we assessed the implication of osteoprotegerin (OPG) and sclerostin (SCL), two biomarkers associated with cardiovascular disease and bone metabolism, in the clinical spectrum and atherosclerotic disease of patients with axSpA. METHODS: OPG and SCL serum levels were determined in 163 axSpA Spanish patients (119 ankylosing spondylitis and 44 non-radiographic axSpA) and 63 healthy controls by enzyme-linked immunosorbent assay...
December 15, 2017: Clinical and Experimental Rheumatology
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