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https://www.readbyqxmd.com/read/29770299/regenerative-medicine-therapy-for-single-ventricle-congenital-heart-disease
#1
REVIEW
Chetan Ambastha, Gregory J Bittle, David Morales, Nathaniel Parchment, Progyaparamita Saha, Rachana Mishra, Sudhish Sharma, Alexander Vasilenko, Muthukumar Gunasekaran, Manal T Al-Suqi, Deqiang Li, Peixin Yang, Sunjay Kaushal
One of the most complex forms of congenital heart disease (CHD) involving single ventricle physiology is hypoplastic left heart syndrome (HLHS), characterized by underdevelopment of the left ventricle (LV), mitral and aortic valves, and narrowing of the ascending aorta. The underdeveloped LV is incapable of providing long-term systemic flow, and if left untreated, the condition is fatal. Current treatment for this condition consists of three consecutive staged palliative operations: the first is conducted within the first few weeks of birth, the second between 4 to 6 months, and the third and final surgery within the first 4 years...
April 2018: Translational Pediatrics
https://www.readbyqxmd.com/read/29764362/gpu-accelerated-iterative-reconstruction-for-limited-data-tomography-in-cbct-systems
#2
Claudia de Molina, Estefania Serrano, Javier Garcia-Blas, Jesus Carretero, Manuel Desco, Monica Abella
BACKGROUND: Standard cone-beam computed tomography (CBCT) involves the acquisition of at least 360 projections rotating through 360 degrees. Nevertheless, there are cases in which only a few projections can be taken in a limited angular span, such as during surgery, where rotation of the source-detector pair is limited to less than 180 degrees. Reconstruction of limited data with the conventional method proposed by Feldkamp, Davis and Kress (FDK) results in severe artifacts. Iterative methods may compensate for the lack of data by including additional prior information, although they imply a high computational burden and memory consumption...
May 15, 2018: BMC Bioinformatics
https://www.readbyqxmd.com/read/29757291/virus-delivery-of-crispr-guides-to-the-murine-prostate-for-gene-alteration
#3
Maria Riedel, Martin F Berthelsen, Latifa Bakiri, Erwin F Wagner, Martin K Thomsen
With an increasing incidence of prostate cancer, identification of new tumor drivers or modulators is crucial. Genetically engineered mouse models (GEMM) for prostate cancer are hampered by tumor heterogeneity and its complex microevolution dynamics. Traditional prostate cancer mouse models include, amongst others, germline and conditional knockouts, transgenic expression of oncogenes, and xenograft models. Generation of de novo mutations in these models is complex, time-consuming, and costly. In addition, most of traditional models target the majority of the prostate epithelium, whereas human prostate cancer is well known to evolve as an isolated event in only a small subset of cells...
April 27, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29736913/effects-of-caffeine-on-behavioural-and-cognitive-deficits-in-rats
#4
Melissa S Assis, Aluízio C Soares, Dircilei N de Sousa, João Eudes-Filho, Lilian Rosana F Faro, Fabiana P Carneiro, Mônica V da Silva, Andrea B Motoyama, Greice Maria R de Souza, Stéphanie Marchiori, Nadyelle T de Lima, Raphael Boëchat-Barros, Vania M Ferreira
There are many studies that have sought to find drug therapies to prevent harm arising from sepsis. Such studies have represented a progress in the support to septic patients and also in the development of new pharmacological alternatives. Our interest was to investigate the caffeine effect on sepsis behavioural and memory impairments. Male rats were anaesthetized and the surgery was made to allow exposure of the cecum, which was then squeezed to extrude a small amount of faeces from the perforation site, which was later placed back into the peritoneal cavity...
May 7, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29729405/efficient-sirna-transfer-to-knockdown-a-placenta-specific-lncrna-using-rgd-modified-nano-liposome-a-new-preeclampsia-like-mouse-model
#5
Qianwen Yu, Yue Qiu, Xuhui Wang, Jiajing Tang, Yayuan Liu, Ling Mei, Man Li, Ming Yang, Li Tang, Huile Gao, Zhirong Zhang, Wenming Xu, Qin He
Preeclampsia is one of the most serious pregnancy complications. Many animal models have already been developed by researchers to study the pathogenesis and treatment of preeclampsia. However, most of these animal models were established by systemic administration or by surgery in the uterine cavity, which could lead to unwanted systemic toxicity or operative wounds and affect the accuracy of the results. Because of the high expression level of integrin αvβ3 on the placenta, arginine-glycine-aspartic acid peptide (RGD) modified PEGylated cationic liposome (RGD-Lip) was designed as a novel gene delivery system to target the placenta safely and efficiently, and a new animal model of preeclampsia was established through targeting of long noncoding RNA (lncRNA)...
May 2, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29722950/-adipose-derived-stem-cells-for-the-treatment-of-penile-erectile-dysfunction-an-update
#6
REVIEW
Yi Wang, Ya-Min Wang, Chen Chen, Yi-Chun Wang, Ning-Hong Song
Adipose-derived stem cells (ADSCs) are pluripotent stem cells isolated from the adipose tissue and have the potential for self-renewal and multi-directional differentiation into neurogenic cells, smooth muscle cells, endothelial cells, and so on. Erectile dysfunction (ED) is a common male sexual dysfunction that has a negative impact on the lives of the patients and their partners. Current treatments of ED include surgery and medication, with oral 5-phosphodiesterase inhibitors as the first-line drugs. However, a small number of the patients are not sensitive to these therapies and cannot be improved or cured pathologically...
June 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29721806/optimal-administration-frequency-and-dose-of-teriparatide-for-acceleration-of-biomechanical-healing-of-long-bone-fracture-in-a-mouse-model
#7
Masahiro Ota, Masahiko Takahata, Tomohiro Shimizu, Daisuke Momma, Hiroki Hamano, Shigeto Hiratsuka, Norio Amizuka, Tomoka Hasegawa, Norimasa Iwasaki
Despite preclinical studies demonstrating the effectiveness of teriparatide for skeletal repair in small animals, inconclusive data from clinical trials have raised questions regarding the optimal teriparatide dosing regimen for bone repair. To address this, we assessed the effect of teriparatide frequency and dose on long-bone healing using a mouse femur osteotomy/fracture model. Eight-week-old male ICR mice were subjected to open femur osteotomies, then randomized into following five groups (n = 8 per group): vehicle; low dose/high frequency: 3 μg/kg/dose, 3 times/day; low dose/low frequency: 9 μg/kg/dose, 1 time/day; high dose/high frequency: 9 μg/kg/dose, 3 times/day; high dose/low frequency: 27 μg/kg/dose, 1 time/day...
May 2, 2018: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29684118/spontaneous-endometriosis-in-cynomolgus-monkeys-as-a-clinically-relevant-experimental-model
#8
A Nishimoto-Kakiuchi, S Netsu, S Okabayashi, K Taniguchi, H Tanimura, A Kato, M Suzuki, T Sankai, R Konno
STUDY QUESTION: Does spontaneous endometriosis in cynomolgus monkeys have the characteristics required of a good experimental model? SUMMARY ANSWER: Spontaneous endometriosis in cynomolgus monkeys exhibited similar clinicopathological characteristics to the human disease and was useful as an experimental model. WHAT IS KNOWN ALREADY: The prevalence of endometriosis in autopsied cynomolgus monkeys (Macaca fascicularis) in a breeding colony was reported to be 28...
April 19, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29681948/regeneration-of-tracheal-tissue-in-partial-defects-using-porcine-small-intestinal-submucosa
#9
Nelson Bergonse Neto, Lianna Ferrari Jorge, Julio C Francisco, Bruna Olandoski Erbano, Barbara Evelin Gonçalves Barboza, Larissa Luvison Gomes da Silva, Marcia Olandoski, Katherine Athayde Teixeira de Carvalho, Luiz Felipe Pinho Moreira, Jose Rocha Faria Neto, Eltyeb Abdelwahid, Luiz Cesar Guarita-Souza
Background: Surgical correction of tracheal defects is a complex procedure when the gold standard treatment with primary end-to-end anastomosis is not possible. An alternative treatment may be the use of porcine small intestinal submucosa (SIS). It has been used as graft material for bioengineering applications and to promote tissue regeneration. The aim of this study was to evaluate whether SIS grafts improved tracheal tissue regeneration in a rabbit model of experimental tracheostomy...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29680836/endoscopic-duodenal-mucosal-resurfacing-for-the-treatment-of-type-2-diabetes
#10
Alia Hadefi, Vincent Huberty, Arnaud Lemmers, Marianna Arvanitakis, David Maggs, Guido Costamagna, Jacques Devière
Type 2 diabetes is a pandemic disease with an incidence that has risen steadily over recent decades. Experimental evidence in animals has demonstrated that intestinal bypass surgery of the upper small intestine, particularly the duodenum, has an important role in glucose homoeostasis. Furthermore, Roux-en-Y bypass performed as bariatric surgery has shown to correct hyperglycaemia from the first postoperative days in obese diabetic patients. Therefore, on the basis of these considerations, duodenal mucosal resurfacing was studied in type 2 diabetes patients as a minimally invasive procedure that could offer an alternative treatment for these patients...
April 20, 2018: Digestive Diseases
https://www.readbyqxmd.com/read/29675250/novel-dual-function-near-infrared-ii-fluorescence-and-pet-probe-for-tumor-delineation-and-image-guided-surgery
#11
Yao Sun, Xiaodong Zeng, Yuling Xiao, Changhao Liu, Hua Zhu, Hui Zhou, Ziyang Chen, Fuchun Xu, Jule Wang, Mengyue Zhu, Junzhu Wu, Mei Tian, Hong Zhang, Zixin Deng, Zhen Cheng, Xuechuan Hong
Accurate tumor identification is essential in cancer management. Incomplete excision of tumor tissue, however, negatively affects the prognosis of the patient. To accomplish radical excision of tumor tissue, radiotracers can be used that target tumor tissue and can be detected using a gamma probe during surgery. Intraoperative fluorescence imaging could allow accurate real-time tumor delineation. Herein, a novel dual-modal imaging platform using base-catalyzed double addition of thiols into a propiolamide scaffold has been developed, allowing for the highly efficient and selective assembly of various thiol units in a protecting-group-free manner...
February 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29664732/fibrous-composite-material-for-textile-heart-valve-design-in-vitro-assessment
#12
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/29658566/peek%C3%A2-biphasic-bioceramic-composites-promote-mandibular-defect-repair-and-upregulate-bmp%C3%A2-2-expression-in-rabbits
#13
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/29622753/working-in-singapore-has-been-rewarding-both-professionally-and-financially
#14
(no author information available yet)
Australian vet Shane Ryan owns the Companion Animal Surgery in Singapore. He has lived and worked in the country since 1984. He is president-elect of the World Small Animal Veterinary Association.
April 7, 2018: Veterinary Record
https://www.readbyqxmd.com/read/29604087/uteroplacental-insufficiency-temporally-exacerbates-salt-induced-hypertension-associated-with-a-reduced-natriuretic-response-in-male-rat-offspring
#15
Linda A Gallo, Sarah L Walton, Marc Q Mazzuca, Marianne Tare, Helena C Parkington, Mary E Wlodek, Karen M Moritz
Intrauterine growth restriction increases the risk of developing chronic diseases in adulthood. Lifestyle factors, such as poor dietary choices, may elevate this risk. We determined whether being born small increases the sensitivity to a dietary salt challenge, in the context of hypertension, kidney disease and arterial stiffness. Bilateral uterine vessel ligation or sham surgery (offspring termed Restricted and Control, respectively) was performed on 18-day pregnant WKY rats. Male offspring were allocated to receive a diet high in salt (8% sodium chloride) or remain on standard rat chow (0...
March 31, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29595907/evidence-appraisal-of-meakin-lb-gilman-op-parsons-kj-burton-nj-langley-hobbs-sj-colored-indicator-undergloves-increase-the-detection-of-glove-perforations-by-surgeons-during-small-animal-orthopedic-surgery-a-randomized-controlled-trial-vet-surg-2016-45-6-709
#16
https://www.readbyqxmd.com/read/29564979/levosimendan-for-perioperative-cardioprotection-myth-or-reality
#17
Elpidio Santillo, Monica Migale, Carlo Massini, Raffaele Antonelli Incalzi
BACKGROUND: Levosimendan is a calcium sensitizer drug causing increased contractility in the myocardium and vasodilation in the vascular system. It is mainly used for the therapy of acute decompensated heart failure. Several studies on animals and humans provided evidence of the cardioprotective properties of levosimendan including preconditioning and anti-apoptotic. In view of these favorable effects, levosimendan has been tested in patients undergoing cardiac surgery for the prevention or treatment of low cardiac output syndrome...
March 21, 2018: Current Cardiology Reviews
https://www.readbyqxmd.com/read/29553517/a-mouse-model-of-intestinal-partial-obstruction
#18
Se Eun Ha, Lai Wei, Brian G Jorgensen, Moon Young Lee, Paul J Park, Sandra M Poudrier, Seungil Ro
Intestinal obstructions, that impede or block peristaltic movement, can be caused by abdominal adhesions and most gastrointestinal (GI) diseases including tumorous growths. However, the cellular remodeling mechanisms involved in, and caused by, intestinal obstructions are poorly understood. Several animal models of intestinal obstructions have been developed, but the mouse model is the most cost/time effective. The mouse model uses the surgical implantation of an intestinal partial obstruction (PO) that has a high mortality rate if it is not performed correctly...
March 5, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29544019/utility-of-two-view-vs-three-view-abdominal-radiography-in-canines-presenting-with-acute-abdominal-signs
#19
Marina V Mavromatis, Mauricio Solano, Michael Y Thelen
There are clear differences in the normal radiographic appearance of the abdominal organs between a left lateral vs. a right lateral view. While a few veterinary academic institutions have transitioned to a three-view abdominal radiographic study protocol, obtaining only two views of the canine abdomen remains the current standard in veterinary medicine. In this combined retrospective and prospective, case-controlled study, 48 canine patients presenting with signs of acute abdomen were recruited. Four board-certified veterinary radiologists and four general practice veterinarians with greater than 3 years of experience in small animal practice were asked to determine if 10 predetermined findings were present within the set of images and if surgery was recommended based on those findings...
March 15, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29535357/in-vivo-small-molecule-delivery-to-the-optic-nerve-in-a-rodent-model
#20
Shandiz Tehrani, R Katherine Delf, William O Cepurna, Lauren Davis, Elaine C Johnson, John C Morrison
Small molecule delivery to the optic nerve would allow for exploration of molecular and cellular pathways involved in normal physiology and optic neuropathies such as glaucoma, and provide a tool for screening therapeutics in animal models. We report a novel surgical method for small molecule drug delivery to the optic nerve head (ONH) in a rodent model. In proof-of-principle experiments, we delivered cytochalasin D (Cyt D; a filamentous actin inhibitor) to the junction of the superior optic nerve and globe in rats to target the actin-rich astrocytic cytoskeleton of the ONH...
March 13, 2018: Scientific Reports
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