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https://www.readbyqxmd.com/read/28938688/drag-reducing-polymers-decrease-hepatic-injury-and-metastases-after-liver-ischemia-reperfusion
#1
Samer Tohme, Marina V Kameneva, Hamza O Yazdani, Vikas Sud, Julie Goswami, Patricia Loughran, Hai Huang, Richard L Simmons, Allan Tsung
INTRODUCTION: Surgery, a crucial therapeutic modality in the treatment of solid tumors, can induce sterile inflammatory processes which can result in metastatic progression. Liver ischemia and reperfusion (I/R) injury, an inevitable consequence of hepatic resection of metastases, has been shown to foster hepatic capture of circulating cancer cells and accelerate metastatic growth. Efforts to reduce these negative consequences have not been thoroughly investigated. Drag reducing polymers (DRPs) are blood-soluble macromolecules that can, in nanomolar concentrations, increase tissue perfusion, decrease vascular resistance and decrease near-wall microvascular concentration of neutrophils and platelets thereby possibly reducing the inflammatory microenvironment...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938457/the-association-of-estrogen-receptor-%C3%AE-gene-variation-with-salt-sensitive-blood-pressure
#2
Worapaka Manosroi, Jia Wei Tan, Chevon M Rariy, Bei Sun, Mark O Goodarzi, Aditi R Saxena, Jonathan S Williams, Luminita H Pojoga, Jessica Lasky-Su, Jinrui Cui, Xiuqing Guo, Kent D Taylor, Yii-Der I Chen, Anny H Xiang, Willa A Hsueh, Leslie J Raffel, Thomas A Buchanan, Jerome I Rotter, Gordon H Williams, Ellen W Seely
Context: Hypertension in young women is uncommon compared to young men and older women. Estrogen appears to protect most women against hypertension with incidence increasing after menopause. Since some premenopausal women develop hypertension, estrogen may play a different role in these women. Genetic variations in the estrogen receptor (ER) are associated with cardiovascular disease. ER-β, encoded by ESR2, is the ER predominantly expressed in vascular smooth muscle. Objective: To determine an association of single nucleotide polymorphisms (SNPs) in ESR2 with salt-sensitivity of blood pressure (SSBP) and estrogen status in women...
September 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938308/sensor-based-physiologic-control-strategy-for-biventricular-support-with-rotary-blood-pumps
#3
Yu Wang, Steven C Koenig, Zhongjun Wu, Mark S Slaughter, Guruprasad A Giridharan
Rotary biventricular assist devices (BiVAD) are becoming a clinically accepted treatment option for end-stage biventricular failure. To improve BiVAD efficacy and safety, we propose a control algorithm to achieve the clinical objectives of maintaining left-right-sided balance, restoring physiologic flows, and preventing ventricular suction. The control algorithm consists of two proportional-integral (PI) controllers for left and right ventricular assist devices (LVAD and RVAD) to maintain differential pump pressure across LVAD (ΔPL) and RVAD (ΔPR) to provide left-right balance and physiologic flow...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28938007/neuropilin-1-modulates-tgf%C3%AE-signaling-to-drive-glioblastoma-growth-and-recurrence-after-anti-angiogenic-therapy
#4
Sam C Kwiatkowski, Paola A Guerrero, Shinya Hirota, Zhihua Chen, John E Morales, Manish Aghi, Joseph H McCarty
Glioblastoma (GBM) is a rapidly progressive brain cancer that exploits the neural microenvironment, and particularly blood vessels, for selective growth and survival. Anti-angiogenic agents such as the vascular endothelial growth factor-A (VEGF-A) blocking antibody bevacizumab yield short-term benefits to patients due to blood vessel regression and stabilization of vascular permeability. However, tumor recurrence is common, and this is associated with acquired resistance to bevacizumab. The mechanisms that drive acquired resistance and tumor recurrence in response to anti-angiogenic therapy remain largely unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28937793/investigating-the-antiangiogenic-anti-drug-resistance-and-apoptotic-effects-of-soy-isoflavone-extract-alone-or-in-combination-with-docetaxel-on-murine-4t1-breast-tumor-model
#5
Ehsan Hejazi, Maryam Tavakoli, Mahmood Jeddi-Tehrani, Masoud Kimiagar, Jalal Hejazi, Mohammad Houshyari, Zohre Amiri, Hale Edalatkhah, Javad Nasrollahzadeh, Farah Idali
BACKGROUND: One major concern in the treatment of cancer patients during chemotherapy is drug resistance. Here we investigated the effects of soy isoflavone extracts alone or in combination with Docetaxel on the drug resistance, angiogenesis, apoptosis, and tumor volume in mouse 4T1 breast tumor model. METHODS: Sixty female BALB/c mice were randomly divided into 4 groups: control, dietary soy isoflavone extract [Iso, 100 mg/kg diet (0.01%)], Docetaxel (10 mg/kg) injection, and the combination of dietary soy isoflavone extract and intravenous Docetaxel injection (Docetaxel + Iso)...
September 22, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28937241/preejection-period-as-a-sympathetic-activity-index-a-role-of-confounding-factors
#6
J Krohova, B Czippelova, Z Turianikova, Z Lazarova, I Tonhajzerova, M Javorka
In previous studies, one of the systolic time intervals - preejection period (PEP) - was used as an index of sympathetic activity reflecting the cardiac contractility. However, PEP could be also influenced by several other cardiovascular variables including preload, afterload and diastolic blood pressure (DBP). The aim of this study was to assess the behavior of the PEP together with other potentially confounding cardiovascular system characteristics in healthy humans during mental and orthostatic stress (head-up tilt test - HUT)...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28935964/impact-of-mitochondrial-nitrite-reductase-on-hemodynamics-and-myocardial-contractility
#7
Peter Dungel, Carina Penzenstadler, Mostafa Ashmwe, Sergiu Dumitrescu, Tanja Stoegerer, Heinz Redl, Soheyl Bahrami, Andrey V Kozlov
Inorganic nitrite (NO2(-)) can be reduced back to nitric oxide (NO) by several heme proteins called nitrite reductases (NR) which affect both the vascular tonus and hemodynamics. The objective of this study was to clarify the impact of several NRs on the regulation of hemodynamics, for which hemodynamic parameters such as heart rate, blood pressure, arterial stiffness, peripheral resistance and myocardial contractility were characterized by pulse wave analysis. We have demonstrated that NO2(-) reduced to NO in RBCs predominantly influences the heart rate, while myoglobin (Mb) and mitochondria-derived NO regulates arterial stiffness, peripheral resistance and myocardial contractility...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935511/pavia-experience-in-reoperative-pulmonary-endarterectomy
#8
Vera Nadia Merli, Nicola Vistarini, Valentina Grazioli, Antonio Sciortino, Maurizio Pin, Ilaria Parisi, Andrea Maria D'Armini
In our experience, we reperformed pulmonary endarterectomy (PEA) in 10 patients who previously underwent a first PEA. We analyzed this cohort of patients to investigate the main causes of recurrence of symptomatic pathology and the clinical and hemodynamic results of redo surgery. Between 1994 and April 2016, 10 of 716 patients were reoperated at our institution. Available postoperative data were analyzed, and a comparison between first and second PEA hemodynamic and clinical results was carried out. In-hospital mortality rate was also evaluated...
August 24, 2017: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28934833/hemodynamic-analysis-of-radiation-induced-damage-in-common-carotid-arteries-by-using-color-doppler-ultrasonography
#9
Alireza Mohammadkarim, Manijhe Mokhtari-Dizaji, Ali Kazemian, Hazhir Saberi
Purpose: The aim of this study was to assess vascular changes and blood flow abnormalities in the common carotid arteries of patients with head and neck cancers after external radiotherapy, using color Doppler ultrasonography. Methods: We studied 24 patients treated with external radiotherapy for various head and neck cancers. In order to study the acute effects of irradiation on common carotid blood flow and arterial diameter changes, color Doppler ultrasonography parameters such as peak systolic velocity, end diastolic velocity, mean velocity, systolic-to-diastolic velocity (S/D) ratio, pulsatility index (PI), resistive index (RI), and instantaneous diameter changes were evaluated before and after external radiotherapy...
April 14, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28934649/cooperative-stimulation-of-atherogenesis-by-lipopolysaccharide-and%C3%A2-palmitic-acid-rich-high-fat-diet-in-low-density-lipoprotein-receptor-deficient-mice
#10
Zhongyang Lu, Yanchun Li, Colleen W Brinson, Maria F Lopes-Virella, Yan Huang
BACKGROUND AND AIMS: Either lipopolysaccharide (LPS) or high-fat diet (HFD) enriched with saturated fatty acid (SFA) promotes atherosclerosis. In this study, we investigated the effect of LPS in combination with SFA-rich HFD on atherosclerosis and how LPS and SFA interact to stimulate inflammatory response in vascular endothelial cells. METHODS: Low-density lipoprotein receptor-deficient (LDLR(-/-)) mice were fed a low-fat diet (LFD), HFD with low palmitic acid (PA) (LP-HFD), or HFD with high PA (HP-HFD) for 20 weeks...
September 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28933059/function-and-dysfunction-of-adipose-tissue
#11
Paulo Matafome, Raquel Seiça
Adipose tissue is an endocrine organ which is responsible for postprandial uptake of glucose and fatty acids, consequently producing a broad range of adipokines controlling several physiological functions like appetite, insulin sensitivity and secretion, immunity, coagulation, and vascular tone, among others. Many aspects of adipose tissue pathophysiology in metabolic diseases have been described in the last years. Recent data suggest two main factors for adipose tissue dysfunction: accumulation of nonesterified fatty acids and their secondary products and hypoxia...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28933054/high-stmn1-expression-is-associated-with-cancer-progression-and-chemo-resistance-in-lung-squamous-cell-carcinoma
#12
Pinjie Bao, Takehiko Yokobori, Bolag Altan, Misaki Iijima, Youko Azuma, Ryoichi Onozato, Toshiki Yajima, Akira Watanabe, Akira Mogi, Kimihiro Shimizu, Toshiteru Nagashima, Yoichi Ohtaki, Kai Obayashi, Seshiru Nakazawa, Tuya Bai, Reika Kawabata-Iwakawa, Takayuki Asao, Kyoichi Kaira, Masahiko Nishiyama, Hiroyuki Kuwano
BACKGROUND: Known as a microtubule-destabilizing protein, STMN1 (gene symbol: STMN1) regulates the dynamics of microtubules, cell cycle progress, and chemo-resistance against taxane agents. It is highly expressed in various human cancers and involved in cancer progression as well as poor prognosis. METHODS: Expression of STMN1 was examined by immunohistochemistry using FFPE tissue sections from 186 patients with lung squamous cell carcinoma (LSCC). Analysis of STMN1 suppression was performed for STMN1 small interfering RNA (siRNA)-transfected LSCC cell lines to determine the change in proliferation, invasive and apoptosis abilities, and paclitaxel sensitivity...
September 20, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28930992/a-cell-culture-model-of-resistance-arteries
#13
Lauren A Biwer, Christophe Lechauve, Sheri Vanhoose, Mitchell J Weiss, Brant E Isakson
The myoendothelial junction (MEJ), a unique signaling microdomain in small diameter resistance arteries, exhibits localization of specific proteins and signaling processes that can control vascular tone and blood pressure. As it is a projection from either the endothelial or smooth muscle cell, and due to its small size (on average, an area of ~1 µm(2)), the MEJ is difficult to study in isolation. However, we have developed a cell culture model called the vascular cell co-culture (VCCC) that allows for in vitro MEJ formation, endothelial cell polarization, and dissection of signaling proteins and processes in the vascular wall of resistance arteries...
September 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930524/hypertension-and-cardiometabolic-disease
#14
Ivan Tasic, Dragan Lovic
Hypertension has  a central role in cardiometabolic disease and is usually associated with  metabolic disorders, such as insulin resistance, obesity, and dyslipidemia. Hyperinsulinemia may increase cardiovascular (CV) risk through its promotion of hypertension, which is possibly a result of chronic enhancement of sympathetic nervous system activity, stimulation of the renin-angiotensin-aldosterone system leading to increased renal tubular sodium reabsorption, modulating cation transport, or inducing vascular smooth muscle cell hypertrophy...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28929090/echocardiographic-assessment-of-pulmonary-arterial-hypertension-for-pediatricians-and-neonatologists
#15
REVIEW
Gregory James Skinner
There is a growing awareness of the role that increased pulmonary vascular resistance (PVR) plays in many pathologies; therefore, assessment of pulmonary artery pressure (PAP) is an increasingly requested investigation in the critical care environment. This article will go through the basic concepts regarding PAP and PVR, then will go on to outline the various echocardiographic parameters which are used to assess them. Finally, an outline of how to undertake this assessment will be presented.
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28928842/significant-response-to-ramucirumab-monotherapy-in-chemotherapy-resistant-recurrent-alpha-fetoprotein-producing-gastric-cancer-a-case-report
#16
Yasuhiro Arakawa, Miho Tamura, Keisuke Aiba, Kazuhiko Morikawa, Daisuke Aizawa, Masahiro Ikegami, Masami Yuda, Katsunori Nishikawa
Alpha-fetoprotein (AFP)-producing gastric cancer (AFPGC) is a relatively rare type of gastric cancer characterized by a high incidence of liver and lymph node metastases, and a poor prognosis. Few advanced AFPGC cases treated successfully with conventional chemotherapy have been reported thus far. Although the development of molecular-targeted therapy has improved the prognosis of various types of cancer, there are currently no tailored therapies for AFPGC. In the present report, the case of a chemotherapy-resistant recurrent AFPGC patient who exhibited a significant response to ramucirumab monotherapy is presented...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928616/chronic-antepartum-maternal-hyperoxygenation-in-a-case-of-severe-fetal-ebstein-s-anomaly-with-circular-shunt-physiology
#17
Alisa Arunamata, David M Axelrod, Katherine Bianco, Sowmya Balasubramanian, Amy Quirin, Theresa A Tacy
Perinatal mortality remains high among fetuses diagnosed with Ebstein's anomaly of the tricuspid valve. The subgroup of patients with pulmonary valve regurgitation is at particularly high risk. In the setting of pulmonary valve regurgitation, early constriction of the ductus arteriosus may be a novel perinatal management strategy to reduce systemic steal resulting from circular shunt physiology. We report the use of chronic antepartum maternal oxygen therapy for constriction of the fetal ductus arteriosus and modulation of fetal pulmonary vascular resistance in a late presentation of Ebstein's anomaly with severe tricuspid valve regurgitation, reversal of flow in the ductus arteriosus, and continuous pulmonary valve regurgitation...
September 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28928568/role-of-methylene-blue-in-the-maintenance-of-postinduction-hemodynamic-status-in-patients-with-perforation-peritonitis-a-pilot-study
#18
Muthapillai Senthilnathan, Anusha Cherian, Hemavathi Balachander, Nanda Kishore Maroju
CONTEXT: Methylene blue is an inhibitor of guanylate cyclase and hence prevents vasoplegia mediated by nitric oxide in patients with sepsis. AIMS: This study aimed to analyze the effect of methylene blue on blood pressure maintenance following induction of anesthesia in patients presenting with peritonitis. SUBJECTS AND METHODS: Thirty patients diagnosed to have perforation peritonitis were randomized into two groups (Group MB, Group NS). Patients in Group MB were given injection methylene blue 2 mg/kg over 20 min and patients in Group NS were given 50 ml of normal saline over 20 min, before induction...
July 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28928237/microtubule-structures-underlying-the-sarcoplasmic-reticulum-support-peripheral-coupling-sites-to-regulate-smooth-muscle-contractility
#19
Harry A T Pritchard, Albert L Gonzales, Paulo W Pires, Bernard T Drumm, Eun A Ko, Kenton M Sanders, Grant W Hennig, Scott Earley
Junctional membrane complexes facilitate excitation-contraction coupling in skeletal and cardiac muscle cells by forming subcellular invaginations that maintain close (≤20 nm) proximity of ryanodine receptors (RyRs) on the sarcoplasmic reticulum (SR) with voltage-dependent Ca(2+) channels in the plasma membrane. In fully differentiated smooth muscle cells, junctional membrane complexes occur as distributed sites of peripheral coupling. We investigated the role of the cytoskeleton in maintaining peripheral coupling and associated Ca(2+) signaling networks within native smooth muscle cells of mouse and rat cerebral arteries...
September 19, 2017: Science Signaling
https://www.readbyqxmd.com/read/28926842/pharmacotherapy-with-thymoquinone-improved-pancreatic-%C3%AE-cell-integrity-and-functional-activity-enhanced-islets-revascularization-and-alleviated-metabolic-and-hepato-renal-disturbances-in-streptozotocin-induced-diabetes-in-rats
#20
Adel Galal El-Shemi, Osama Adnan Kensara, Aiman Alsaegh, Mohammed Hasan Mukhtar
AIMS: This study is aimed at evaluating the antidiabetic effects of thymoquinone (TQ) on streptozotocin (STZ)-induced diabetes in rats, and exploring the possible underlying mechanisms. METHODS: Diabetes was induced in adult male Wistar rats by intraperitoneal injection of freshly prepared STZ (65 mg/kg). After disease induction, 42 rats were equally assigned to: controls, STZ-diabetic group, and STZ-diabetic group treated with oral TQ (35 mg/kg/day) for 5 weeks...
September 20, 2017: Pharmacology
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