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https://www.readbyqxmd.com/read/28936922/intraluminal-spindle-shaped-head-suture-induced-occlusion-of-middle-cerebral-artery-in-the-rats
#1
Ye Wu, Lan Hu, Xiaosheng Yang, Xuhui Wang, Liang Wan, Xuming Hua, Juan Cheng, Yi Li
OBJECTIVE: This study aimed to introduce a modified animal model of middle cerebral arterial occlusion (MCAO) through placement of intraluminal spindle-shaped head suture by comparing the traditional MCAO model. METHODS: A total of 60 male Spraque-Dawley (SD) rats were divided into two groups and MCAO was induced using spindle-shaped head suture or round head suture. The mortality, infarct volume, neurological function, success rate of the surgery, and stability of modeling were examined to evaluate the effectiveness of this model...
September 22, 2017: Neurological Research
https://www.readbyqxmd.com/read/28935983/model-based-vascular-elastography-improves-the-detection-of-flow-induced-carotid-artery-remodeling-in-mice
#2
Vyacheslav A Korshunov, Hexuan Wang, Rifat Ahmed, Deanne M Mickelsen, Qian Zhou, Chen Yan, Marvin M Doyley
Increased arterial thickness measured with ultrasound correlates with future cardiovascular events, but conventional ultrasound imaging techniques cannot distinguish between intima, media, or atherosclerotic plaque in the carotid artery. In this work, we evaluated how well vascular elastography can detect intimal changes in a mouse model of carotid remodeling. We ligated the left external and internal branches of the carotid artery of male FVB mice and performed sham operations for 2 weeks. High-resolution ultrasound imaging accurately detected lower blood velocities and low blood volume flow in the carotid arteries after ligation in FVB mice...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935884/muscle-hypertrophy-in-hypoxia-with-inflammation-is-controlled-by-bromodomain-and-extra-terminal-domain-proteins
#3
Clovis Chabert, Saadi Khochbin, Sophie Rousseaux, Rebecca Furze, Nicholas Smithers, Rab Prinjha, Uwe Schlattner, Christophe Pison, Hervé Dubouchaud
Some of the Chronic Obstructive Pulmonary Disease (COPD) patients engaged in exercise-based muscle rehabilitation programs are unresponsive. To unravel the respective role of chronic hypoxia and pulmonary inflammation on soleus muscle hypertrophic capacities, we challenged male Wistar rats to repeated lipopolysaccharide instillations, associated or not with a chronic hypoxia exposure. Muscle hypertrophy was initiated by bilateral ablation of soleus agonists 1 week before sacrifice. To understand the role played by the histone acetylation, we also treated our animals with an inhibitor of bromodomains and extra terminal proteins (I-BET) during the week after surgery...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935484/effects-of-low-level-laser-therapy-and-platelet-concentrate-on-bone-repair-histological-histomorphometric-immunohistochemical-and-radiographic-study
#4
Thiago Hoffman Jonasson, Rafael Zancan, Lucas de Oliveira Azevedo, Ana Claudia Fonseca, Marcela Claudino da Silva, Allan Fernando Giovanini, João Cesar Zielak, Melissa Rodrigues de Araujo
PURPOSE: Low-level laser therapy (LLLT) can increase bone metabolism, cell proliferation, and maturation, and reduce inflammation, while platelet concentrate (PC) assists bone healing process by releasing proteins and growth factors. Here, we evaluated the efficacy of combined LLLT and PC therapy in the healing of critical-size bone defects. MATERIALS AND METHODS: Calvarial critical-size defects 5 mm in diameter were made in 48 Wistar rats. Bones were removed, milled, and used as autogenous bone grafts...
August 19, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28932732/sustained-released-mixture-of-vascular-endothelial-growth-factor-165-and-fibrin-glue-strengthens-healing-of-ileal-anastomoses-in-a-rabbit-model-with-intraperitoneal-infection
#5
Zhanwu Li, Wenjun Wang, Xiaozhou Wang, Lei Jiang, Fengyi Wang, Qiang Liu
PURPOSE: To investigate the effects of a sustained-released mixture of vascular endothelial growth factor 165 (VEGF165) and fibrin glue (FG) local administration on postoperative rabbit ileal anastomoses. METHODS: One hundred twenty-eight male and female New Zealand white rabbits underwent intraperitoneal infection subsequent ileal anastomosis surgery were divided randomly into 4 groups, including 32 animals in each, applied with saline solution, FG, rhVEGF165 and a mixture of rhVEGF165 with FG (VEGF + FG) on the anastomoses, respectively...
September 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28932492/kidney-remote-ischemic-preconditioning-as-a-novel-strategy-to-explore-the-accurate-protective-mechanisms-underlying-remote-ischemic-preconditioning
#6
Muobarak J Tuorkey
INTRODUCTION: This study reports a novel strategy for investigating the key factors responsible for the protective effect of remote ischemic preconditioning (RIPC) against renal ischemia-reperfusion (IR) injury, which remains the leading cause of the acute kidney injury that increase the morbidity and mortality in patients with renal impairment. METHODS: The renal blood flow of the right kidneys in kidney remote ischemic preconditioning (KRIPC) group was occluded for 20 min...
March 2017: Interventional Medicine & Applied Science
https://www.readbyqxmd.com/read/28931340/lessons-learnt-from-early-failure-of-a-patient-trial-with-a-polymer-on-polymer-resurfacing-hip-arthroplasty
#7
Job L C Van Susante, Nico Verdonschot, L Paul A Bom, Pawel Tomaszewski, Pat Campbell, Edward Ebramzadeh, B Wim Schreurs
Background and purpose - Hip resurfacing (HR) is a treatment option promoted for hip arthritis in young and active patients. However, adverse reactions to metal are a concern and the search for non-metallic bearing options proceeds. We present the first clinical study performed in patients using a newly developed hydrophilic polymer-on-polymer hip resurfacing device. Patients and methods - After performing extensive hip simulator tests, biocompatibility testing and animal tests (ISO 14242-1,3; 10993-3,4,5,10,11), approval was obtained from the IRB committee to enroll 15 patients in the first clinical study in humans using this experimental polymer-on-polymer hip resurfacing device...
September 21, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28930755/vegf-and-igf-delivered-from-alginate-hydrogels-promote-stable-perfusion-recovery-in-ischemic-hind-limbs-of-aged-mice-and-young-rabbits
#8
Erin M Anderson, Eduardo A Silva, Yibai Hao, Kathleen D Martinick, Sarah A Vermillion, Alexander G Stafford, Elisabeth G Doherty, Lin Wang, Edward J Doherty, Paul M Grossman, David J Mooney
Biomaterial-based delivery of angiogenic growth factors restores perfusion more effectively than bolus delivery methods in rodent models of peripheral vascular disease, but the same success has not yet been demonstrated in clinically relevant studies of aged or large animals. These studies explore, in clinically relevant models, a therapeutic angiogenesis strategy for the treatment of peripheral vascular disease that overcomes the challenges encountered in previous clinical trials. Alginate hydrogels providing sustained release of vascular endothelial growth factor (VEGF) and insulin-like growth factor-1 (IGF) were injected into ischemic hind limbs in middle-aged and old mice, and also in young rabbits, as a test of the scalability of this local growth factor treatment...
September 21, 2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/28929278/effect-and-mechanisms-of-diabetes-resolution-according-to-the-range-of-gastric-resection-and-the-length-of-anastomosis-in-animal-models-implication-for-gastric-cancer-surgery-in-patients-with-diabetes-mellitus
#9
Yeon-Ju Huh, Young-Gil Son, Tae-Han Kim, Ji-Ho Park, Tae-Jung Oh, Boram Choi, Jimin Min, Young Min Cho, Han-Kwang Yang, Hyuk-Joon Lee
BACKGROUND: To examine the effect and mechanism of Roux-en-Y gastric bypass (RYGB) on the improvement of diabetes according to the length of anastomosis and the gastric pouch volume in an animal model. METHODS: Glucose intolerance was induced with a high-fat diet for 3 months in Sprague-Dawley rats. The animals were subjected to conventional RYGB (cRYGB; 5% gastric pouch with 15-cm Roux limb, 40-cm biliopancreatic limb; n = 9), short-limb RYGB (sRYGB; 5%, 8, 4 cm; n = 9), fundus-sparing RYGB (fRYGB; 30%, 8, 4 cm; n = 9), or sham operation (n = 9)...
September 19, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28922712/ellagic-acid-promotes-ventricular-remodeling-after-acute-myocardial-infarction-by-up-regulating-mir-140-3p
#10
Da-Zhen Wei, Cong Lin, Yin-Qing Huang, Lian-Pin Wu, Ming-Yuan Huang
In the paper, we observed the effect of ellagic acid (EA) on myocardial morphology and cardiac function and explored the mechanism of miR-140-3p-mediated EA in ventricular remodeling. The experimental animals were divided into 3 groups: control group, AMI group, AMI+EA group. Intragastric administration for 4 weeks was initiated on the first day after surgery in rats. Rodent echocardiography was used to measure heart size and cardiac function. The level of fibrosis was observed by Masson staining. The number of cell apoptosis was detected by TUNEL method...
September 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922370/ileocolic-resection-is-associated-with-increased-susceptibility-to-injury-in-a-murine-model-of-colitis
#11
Troy Perry, Michael Laffin, Richard N Fedorak, Aducio Thiesen, Bryan Dicken, Karen L Madsen
Ileocolic resection (ICR) is the most common intestinal resection performed for Crohn's disease, with recurrences commonly occurring at the site of the anastomosis. This study used an animal model of ICR in wild-type mice to examine immunologic changes that developed around the surgical anastomosis and how these changes impacted gut responses to minor acute injury. ICR was performed in adult 129S1/SvlmJ mice and results compared with mice receiving sham or no surgery. Dextran sodium sulfate was given either on post-operative day 9 or day 24 to evaluate immune responses in the intestine both immediately following surgery and after a period of healing...
2017: PloS One
https://www.readbyqxmd.com/read/28921522/extraluminal-biodegradable-splint-to-treat-upper-airway-anterior-malacia-a-preclinical-proof-of-principle
#12
François Gorostidi, Cécile Courbon, Marco Burki, Antoine Reinhard, Kishore Sandu
OBJECTIVE: Upper airway malacia highly complicates the treatment of benign laryngotracheal stenosis, and no ideal option is available to date. We here explore the use of extraluminal biodegradable splints in an animal model of long-segment anterior tracheomalacia (TM). We show the efficacy, as well as the tissue tolerance, of a custom-made biodegradable extraluminal device surgically inserted around the trachea. STUDY DESIGN: Preclinical animal study. METHODS: Anterior TM was induced in rabbits through an anterior neck approach by removing eight consecutive anterior tracheal rings without damaging the underlying mucosa...
September 16, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28919812/the-effect-of-local-topical-analgesics-on-incisional-pain-in-a-pig-model
#13
David Castel, Itai Sabbag, Sigal Meilin
Interest in the development of new topical/local drug administration for blocking pain at peripheral sites, with maximum drug activity and minimal systemic effects, is on the rise. In the review article by Kopsky and Stahl, four critical barriers in the process of research and development of topical analgesics were indicated. The active pharmaceutical ingredient (API) and the formulation are among the major challenges. The road to the development of such drugs passes through preclinical studies. These studies, if planned correctly, should serve as guidance for choosing the right API and formulation...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28919807/effect-of-nerve-injury-on-the-number-of-dorsal-root-ganglion-neurons-and-autotomy-behavior-in-adult-bax-deficient-mice
#14
Chuang Lyu, Gong-Wei Lyu, Aurora Martinez, Tie-Jun Sten Shi
BACKGROUND: The proapoptotic molecule BAX, plays an important role in mitochondrial apoptotic pathway. Dorsal root ganglion (DRG) neurons depend on neurotrophic factors for survival at early developmental stages. Withdrawal of neurotrophic factors will induce apoptosis in DRG neurons, but this type of cell death can be delayed or prevented in neonatal Bax knockout (KO) mice. In adult animals, evidence also shows that DRG neurons are less dependent upon neurotrophic factors for survival...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28919215/thermo-responsive-in-situ-forming-hydrogels-as-barriers-to-prevent-post-operative-peritendinous-adhesion
#15
Pang-Yun Chou, Shih-Heng Chen, Chih-Hao Chen, Shih-Hsien Chen, Yi Teng Fong, Jyh-Ping Chen
In this study, we aimed to assess whether thermo-responsive in-situ forming hydrogels based on poly(N-isopropylacrylamide) (PNIPAM) could prevent post-operative peritendinous adhesion. The clinical advantages of the thermo-responsive hydrogels are acting as barrier material to block penetration of fibroblasts, providing mobility and flexibility during application and enabling injection through a small opening to fill spaces of any shape after surgery. The thermo-responsiveness of hydrogels was determined to ensure their clinic uses...
September 12, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28917658/multiple-events-of-gene-manipulation-via-in-pouch-electroporation-in-a-marsupial-model-of-mammalian-forebrain-development
#16
Annalisa Paolino, Laura R Fenlon, Peter Kozulin, Linda J Richards, Rodrigo Suárez
BACKGROUND: The technique of in utero electroporation has been widely used in eutherians, such as mice and rats, to investigate brain development by selectively manipulating gene expression in specific neuronal populations. A major challenge, however, is that surgery is required to access the embryos, affecting animal survival and limiting the number of times it can be performed within the same litter. New method: Marsupials are born at an early stage of brain development as compared to eutherians...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28916564/modulation-of-the-gut-microbiome-a-systematic-review-of-the-effect-of-bariatric-surgery
#17
Yan Guo, Zhi-Ping Huang, Chao-Qian Liu, Lin Qi, Yuan Sheng, Da-Jin Zou
OBJECTIVE: Bariatric surgery is recommended for patients with obesity and type 2 diabetes. Recent evidence suggested a strong connection between gut microbiota and bariatric surgery. DESIGN: Systematic review. METHODS: The PubMed and OVID Embase were used and articles concerning bariatric surgery and gut microbiota were screened. The main outcome measures were alterations of gut microbiota after bariatric surgery and correlations between gut microbiota and host metabolism...
September 15, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28916046/inflammatory-response-and-long-term-behavioral-assessment-after-neonatal-co2-pneumothorax-study-in-a-rodent-model
#18
Alice Miranda, Susana Roque, Cláudia Serre-Miranda, José Miguel Pêgo, Jorge Correia-Pinto
BACKGROUND: Carbon-dioxide (CO2)-pneumothorax during minimally invasive surgery induces well-known metabolic changes. However, little is known about its impact on the central nervous system. The aim of this work is to evaluate the acute impact of CO2-pneumothorax over central cytokine response and its long-term effect on animal behavior. METHODS: This is an experimental study where neonatal Sprague-Dawley rats are submitted to CO2-pneumothorax. Peripheral and central cytokine response was evaluated 24h after insufflation, and peripheral immune cell phenotyping was evaluated 24h and 4weeks post-insufflation...
August 24, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28915647/necroptosis-as-a-potential-therapeutic-target-in-multiple-organ-dysfunction-syndrome
#19
Yao-Li Cui, Li-Hua Qiu, Shi-Yong Zhou, Lan-Fang Li, Zheng-Zi Qian, Xian-Ming Liu, Hui-Lai Zhang, Xiu-Bao Ren, Yong-Qiang Wang
PURPOSE: To investigate how necroptosisis, i.e. programmed necrosis, is involved in MODS, and to examine whether Nec-1, a specific necroptosis inhibitor, ameliorates multiorgan injury in MODS. EXPERIMENTAL DESIGN: A model of MODS was established in six-week old SD rats using fracture trauma followed by hemorrhage. Control animals received sham surgery. Cell death form and necrosome formation were measured by fluorescence-activated cell sorting and western blotting...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915538/long-term-t3-and-t4-treatment-as-an-alternative-to-aerobic-exercise-training-in-improving-cardiac-function-post-myocardial-infarction
#20
Rayane Brinck Teixeira, Alexsandra Zimmer, Alexandre Luz de Castro, Bruna Gazzi de Lima-Seolin, Patrick Türck, Rafaela Siqueira, Adriane Belló-Klein, Pawan K Singal, Alex Sander da Rosa Araujo
Here we aimed to compare the beneficial effects of T3 and T4 hormone treatment to those provided by aerobic exercise training in Wistar rats post-myocardial infarction (MI). Rats in one group were SHAM-operated and in the other group were subjected to MI surgery. One week after surgery, the MI group animals either received T3 and T4 hormones by gavage or underwent a low intensity aerobic exercise training protocol on a treadmill, and both treatments lasted until 10 weeks after MI. Untreated SHAM-operated and MI groups were also followed for the same duration...
September 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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