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https://www.readbyqxmd.com/read/29668079/co-culture-of-adipose-derived-stem-cells-and-chondrocytes-on-three-dimensionally-printed-bioscaffolds-for-craniofacial-cartilage-engineering
#1
Robert J Morrison, Hassan B Nasser, Khaled N Kashlan, David A Zopf, Derek J Milner, Colleen L Flanangan, Matthew B Wheeler, Glenn E Green, Scott J Hollister
OBJECTIVES/HYPOTHESIS: Reconstruction of craniofacial cartilagenous defects are among the most challenging surgical procedures in facial plastic surgery. Bioengineered craniofacial cartilage holds immense potential to surpass current reconstructive options, but limitations to clinical translation exist. We endeavored to determine the viability of utilizing adipose-derived stem cell-chondrocyte co-culture and three-dimensional (3D) printing to produce 3D bioscaffolds for cartilage tissue engineering...
April 18, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29667248/establishment-of-a-radiotelemetric-recording-technique-in-mice-to-investigate-gastric-slow-waves-modulatory-role-of-putative-neurotransmitter-systems
#2
Huichuan Wang, Zengbing Lu, Yuen Hang Liu, Yayi Sun, Longlong Tu, Man P Ngan, Chi-Kong Yeung, John A Rudd
NEW FINDINGS: What is the central question of this study? Gastric slow waves originating from interstitial cells of Cajal-smooth muscle syncytium are usually studied in culture or in tissue segments, but no studies have made recording of slow waves from conscious freely moving mice. Can radiotelemetry be used to record slow waves, and do they respond predictably to drug treatment? What is the main finding and its importance? Radiotelemetry may be used to record slow waves from conscious freely moving mice permitting an examination of drug action in vivo, which is critical to drug discovery projects characterizing drugs and metabolites on gastrointestinal function...
April 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29664732/fibrous-composite-material-for-textile-heart-valve-design-in-vitro-assessment
#3
Amna Amri, Gaetan Laroche, Nabil Chakfe, Frederic Heim
With over 150,000 implantations performed over the world, transcatheter aortic valve replacement (TAVR) has become a surgical technique, which largely competes with open surgery valve replacement for an increasing number of patients. The success of the procedure favors the research toward synthetic valve leaflet materials as an alternative to biological tissues, whose durability remains unknown. In particular, fibrous constructions have recently proven to be durable in vivo over a 6-month period of time in animal sheep models...
April 17, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29663944/repair-of-a-large-ventral-hernia-in-a-rhesus-macaque-macaca-mulatta-by-using-an-abdominal-component-separation-technique
#4
Steve J Kempton, Jacqueline S Israel, Saverio Capuano Iii, Samuel O Poore
Here we present a 32-y-old rhesus macaque (Macaca mulatta) with a large recurrent ventral incisional hernia. The initial surgery included midline celiotomy for treatment of endometriosis, in which the animal developed a hernia that was repaired with interposition of mesh. Hernia recurrence at 1 y resulted in a defect measuring 7 × 13 cm, with loss of abdominal domain. Skin breakdown was noted with areas of exposed mesh through the skin with associated acute on chronic infection. Clinically, the animal was lethargic, not eating, and failing to thrive...
April 2, 2018: Comparative Medicine
https://www.readbyqxmd.com/read/29662762/local-administration-of-trolox-a-vitamin-e-analog-reduced-tendon-adhesion-in-a-chicken-model-of-flexor-digitorum-profundus-tendon-injury
#5
Yuk Wa Lee, Sai Chuen Fu, Tsui Yu Mok, Kai Ming Chan, Leung Kim Hung
Background: Hand flexor tendon injuries are compromised with tendon adhesion. Tendon adhesion forms between flexor tendon and tendon sheath, reduces the range of motion of fingers, and affects their function. Oxidative stress is increased in flexor tendon after injury and might play a role in tendon adhesion formation. Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), a water-soluble analog of vitamin E, is antioxidative. Trolox reduced oxidative stress and the expression of fibrotic cytokines in the bile gut ligation animal model...
July 2017: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29661505/training-cardiothoracic-surgeons-of-the-future-the-uk-experience
#6
Louise Kenny, Karen Booth, Kathrin Freystaetter, Greta Wood, Gary Reynolds, Sridhar Rathinam, Narain Moorjani
OBJECTIVE: The study aimed to assess targeted simulation courses, including live animal operating, as complementary training tools with regard to 2 key surgical skills in early cardiothoracic surgeon training. METHODS: Twenty UK surgical trainees (equivalent to cardiothoracic surgery resident physicians in the United States) in their first year of residency training were evaluated. Assessment of skills in pulmonary wedge resection and cardiopulmonary bypass were undertaken before and after 2 boot camp-style courses, including live animal operating (boot camp 1 and boot camp 2)...
February 15, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29661283/2-octylcyanoacrylate-for-the-prevention-of-anastomotic-leak
#7
Anthony B Costales, Deepa Patil, Anny Mulya, John P Kirwan, Chad M Michener
BACKGROUND: Anastomotic leak after colorectal surgery is a significant cause of morbidity and mortality. The aim of this study was to evaluate the impact of a reinforced colo-colonic anastomosis with tissue adhesive, 2-octylcyanoacrylate (2-OCA), on the integrity of anastomotic healing as measured by anastomotic bursting pressure. METHODS: Sixty-eight female Sprague-Dawley rats underwent a rectosigmoid colon transection and a sutured end-to-end anastomosis followed by randomization to receive no further intervention or reinforcement with the tissue adhesive, 2-OCA...
June 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29659995/the-importance-of-wall-apposition-in-flow-diverters
#8
René Aquarius, Antonius de Korte, Debby Smits, Matthew Gounis, Kiek Verrijp, Léon Driessen, William Leenders, Joost de Vries
BACKGROUND: It is assumed that high pore densities in flow diverters (FDs) are beneficial for intracranial aneurysm (IA) healing. However, various animal studies are not conclusive on the issue, suggesting that other factors are in play. One important factor might be wall apposition. OBJECTIVE: To (1) determine the relationship between FD pore density and aneurysm occlusion, and (2) determine the relationship between FD wall apposition and aneurysm occlusion. METHODS: Saccular aneurysms were microsurgically created in the aorta of 36 Wistar rats...
April 4, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29658939/simultaneous-recordings-of-cortical-local-field-potentials-electrocardiogram-electromyogram-and-breathing-rhythm-from-a-freely-moving-rat
#9
Yu Shikano, Takuya Sasaki, Yuji Ikegaya
Monitoring the physiological dynamics of the brain and peripheral tissues is necessary for addressing a number of questions about how the brain controls body functions and internal organ rhythms when animals are exposed to emotional challenges and changes in their living environments. In general experiments, signals from different organs, such as the brain and the heart, are recorded by independent recording systems that require multiple recording devices and different procedures for processing the data files...
April 2, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29658862/progress-in-gene-therapy-for-chronic-heart-failure
#10
Zhi-Qiang Yin, Wan-Hong Xing
Chronic heart failure (CHF) is still the leading cause of morbidity and mortality worldwide, and carries with it large economic and social burdens. Although steady and substantial progress has been made in reducing mortality from heart failure using conventional treatments, novel pharmacologic and surgical interventions have not been effective in extending five year survival rates. Therefore, it is necessary to explore new therapies. Gene therapy was introduced in 1970s with the development of recombinant DNA technology...
March 5, 2018: Heart Surgery Forum
https://www.readbyqxmd.com/read/29658566/peek%C3%A2-biphasic-bioceramic-composites-promote-mandibular-defect-repair-and-upregulate-bmp%C3%A2-2-expression-in-rabbits
#11
Hedong Yu, Yongji Chen, Min Mao, Dongyan Liu, Jun Ai, Weidong Leng
The present study aimed to investigate whether bone morphogenetic protein‑2 (BMP‑2) was involved in the repair of mandibular defects using polyether‑ether‑ketone biphasic bioceramic (PEEK‑BBC) composites in rabbits. PEEK‑BBC composites with abundant and interconnected pores were prepared by calcination and characterized by scanning electron microscope. A mandibular defect model in rabbits was established using dental grinder to produce a square hole. A total of 60 rabbits were divided into four groups: Control, sham, surgery, and PEEK...
April 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29658197/role-of-geranylgeranylacetone-as-non-toxic-hsp70-inducer-in-liver-surgery-clinical-application
#12
REVIEW
Seiki Tashiro, Hidenori Miyake, Kazuhito Rokutan
Heat shock proteins (HSPs) are rapidly synthesized into cells in response to various types of physical or chemical insults and induce potent resistance to the stressors. A stress-inducible HSP70 is not expressed in normal conditions, but once HSP70 is excessively induced under various environmental stresses, HSP70-expressing cells can survive even under lethal conditions. In this review, we focused on the potential role of HSPs particularly HSP70 in liver surgery. A non-toxic HSP70 inducer, geranylgeranylacetone (GGA), has been introduced to exert a potent cytoprotective action against liver injury after ischemia/reperfusion, massive hepatectomy and liver transplantation in animal experiments...
April 15, 2018: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/29656776/purulenta-pericarditis-and-pasteurella-multocida-an-extremely-rare-entity
#13
Raquel Ferreira, José Martins, Tiago Adrega, Sara Pinto, Sofia Nunes, Rita Pancas, Anabela Gonzaga, José Santos
Purulent pericarditis is a rare entity, defined as the presence of neutrophilic pericardial effusion which is infected by a bacterial, fungus or parasite agent. The diagnosis can be challenging, especially if patients have taken previous antibiotic therapy; on the other hand the recognition of this pathology is often made late, with the onset of severe symptoms or signs of cardiac tamponade or even only at the autopsy. The authors describe the case of a 82-year-old woman with history of extensive laceration of the right lower limb from a dog bite in July 2016, admitted to the Cardiology Department one month later for Acute Pericarditis...
April 12, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29656074/protein-phosphatase-2a-as-a-new-target-for-downregulating-osteoclastogenesis-and-alleviating-titanium-particle-induced-bone-resorption
#14
Liangliang Wang, Xiaobin Guo, Wei Zhou, Yayun Ding, Jiawei Shi, Xiexing Wu, Yu Liu, Yaozeng Xu, Huilin Yang, Dechun Geng
Receptor activator of nuclear factor-кB ligand (RANKL)-induced osteoclastogenesis is believed to play a critical role in osteolytic diseases including peri-prosthetic osteolysis (PPO), the primary reason for implant failure and revision surgery. In this study, we observed that protein phosphatase 2A (PP2A), a major serine-threonine phosphatase, was highly expressed in human periprosthetic interface membranes with aseptic loosening and in a murine osteolysis model induced by titanium particle irritation. PP2A inhibition effectively alleviated titanium particle-induced bone destruction at osteolytic sites...
April 12, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29653127/evaluation-of-early-chronic-functional-outcomes-and-their-relationship-to-pre-frontal-cortex-and-hippocampal-pathology-following-moderate-severe-traumatic-brain-injury
#15
Alina Arulsamy, Jason Teng, Holly Colton, Frances Corrigan, Lyndsey Collins-Praino
TBI is a significant risk factor for the development of dementia, with the interaction between structural damage from TBI and neuroinflammation potentially driving this relationship. This study investigated the early chronic post-TBI neuroinflammatory response and its relationship to both neurodegenerative pathology and functional impairment up to 3 months post-injury. Sprague-Dawley rats underwent either sham surgery or the Marmarou model of diffuse moderate-severe TBI. At 1-month and 3-months post-injury, a functional battery encompassing motor function, depressive-like behaviour, anxiety and cognition was performed...
April 10, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29651746/human-neural-stem-progenitor-cells-derived-from-epileptic-human-brain-in-a-self-assembling-peptide-nanoscaffold-improve-traumatic-brain-injury-in-rats
#16
Ali Jahanbazi Jahan-Abad, Sajad Sahab Negah, Hassan Hosseini Ravandi, Sedigheh Ghasemi, Maryam Borhani-Haghighi, Walter Stummer, Ali Gorji, Maryam Khaleghi Ghadiri
Traumatic brain injury (TBI) is a disruption in the brain functions following a head trauma. Cell therapy may provide a promising treatment for TBI. Among different cell types, human neural stem cells cultured in self-assembling peptide scaffolds have been suggested as a potential novel method for cell replacement treatment after TBI. In the present study, we accessed the effects of human neural stem/progenitor cells (hNS/PCs) derived from epileptic human brain and human adipose-derived stromal/stem cells (hADSCs) seeded in PuraMatrix hydrogel (PM) on brain function after TBI in an animal model of brain injury...
April 12, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29651439/micrometer-sized-titanium-particles-induce-aseptic-loosening-in-rabbit-knee
#17
Hao Xu, Cui-Cui Guo, Zheng-Yu Gao, Chang-Yao Wang, Hai-Ning Zhang, Cheng-Yu Lv, Zi-Yan Yin, Ying-Zhen Wang
Wear debris induced aseptic loosening is the leading cause of total knee arthroplasty (TKA) failure. The complex mechanism of aseptic loosening has been a major issue for introducing effective prevention and treatment methods, so a simplified yet efficient rabbit model was established to address this concern with the use of micrometer-sized titanium particles. 20 New Zealand white rabbits were selected and divided into two groups (control = 10, study = 10). A TKA surgery was then performed for each of them, with implantation of a titanium rod prosthesis which was coated evenly with micrometer-sized titanium in the study group and nothing in the control group, into right femoral medullary cavity...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29648848/howard-b-eichenbaum-1947-2017
#18
Neal J Cohen, Matthew Shapiro
Presents an obituary of Howard B. Eichenbaum (1947-2017). Eichenbaum, a world leader in the study of memory and the brain, died in Boston, Massachusetts, on July 21, 2017, at age 69, following recent spine surgery. Eichenbaum was a hugely creative and integrative scientist whose work combined cognitive and lesion analyses with high-density neuronal recordings, providing insights into brain computations and representations that help bridge psychological and physiological mechanisms of memory. His theories and original and elegant experiments in animals have greatly advanced our knowledge of the nature and brain mechanisms of memory in animals and humans alike...
April 2018: American Psychologist
https://www.readbyqxmd.com/read/29645348/retzius-sparing-robot-assisted-radical-prostatectomy-using-revo-i-robotic-surgical-system-surgical-technique-and-results-of-the-first-human-trial
#19
Ki Don Chang, Ali Abdel Raheem, Young Deuk Choi, Byung Ha Chung, Koon Ho Rha
PURPOSE: Recently, Revo-i® robotic surgical system has been proved to be safe in the preclinical animal studies. Our aim was to evaluate the safety and proficiency of Revo-i® robotic platform in the treatment of prostate cancer (PCa). PATIENTS AND METHODS: A prospective study was carried out on 17 male patients with clinically localized PCa from August 17, 2016, to Feb 23, 2017 at our urology department using Revo-i® . Patients underwent Retzius-sparing robot-assisted radical prostatectomy (RP-RARP)...
April 12, 2018: BJU International
https://www.readbyqxmd.com/read/29630037/a-recovery-cardiopulmonary-bypass-model-without-transfusion-or-inotropic-agents-in-rats
#20
Shingo Hirao, Hidetoshi Masumoto, Tatsuya Itonaga, Kenji Minatoya
Cardiopulmonary bypass (CPB) is indispensable in cardiovascular surgery. Despite the dramatic refinement of CPB technique and devices, multi-organ complications related to prolonged CPB still compromise the outcome of cardiovascular surgeries, and may worsen postoperative morbidity and mortality. Animal models recapitulating the clinical usage of CPB enable the clarification of the pathophysiological processes that occur during CPB, and facilitate pre-clinical studies to develop strategies protecting against these complications...
March 23, 2018: Journal of Visualized Experiments: JoVE
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