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https://www.readbyqxmd.com/read/29352701/bailout-surgical-explantation-of-a-transcatheter-valve-in-valve-for-subacute-thrombosis-when-there-is-no-time-for-anticoagulation-case-report-and-literature-review
#1
Francesco Notaristefano, Matteo Rocco Reccia, Salvatore Notaristefano, Roberto Annunziata, Rocco Sclafani, Giuseppe Ambrosio, Claudio Cavallini
Trancatheter heart valve (THV) thrombosis is effectively treated with anticoagulation but alternative therapies are required when a faster gradient reduction is needed. Open heart surgery has been rarely performed due to the high perioperative mortality and only five cases have been described so far. Here we describe a case of emergent surgical explantation for THV thrombosis after a valve-in-valve. A 67years old man underwent transcatheter aortic valve implantation for a failed surgical bioprosthesis Epic 21mm (St...
December 13, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29352619/quantitative-evaluation-of-enzyme-induced-porcine-articular-cartilage-degeneration-based-on-observation-of-entire-cartilage-layer-using-ultrasound
#2
Jingchen Zhang, Liying Xiao, Lingying Tong, Chao Wan, Zhixiu Hao
Enzyme-induced articular cartilage degeneration resembling osteoarthritis was evaluated using a newly defined acoustic parameter, the "averaged magnitude ratio" (AMR), which has been suggested as an indicator of articular cartilage degeneration. In vitro experiments were conducted on porcine cartilage samples digested with trypsin for 2 h (n = 10) and 4 h (n = 13) and healthy control samples (n = 13). AMR was determined with 15- and 25-MHz ultrasound, and the integrated reflection coefficient (IRC) and apparent integrated backscattering coefficient (AIB) were also calculated for comparison...
January 15, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29352484/melatonin-ameliorates-a%C3%AE-42-induced-alteration-of-%C3%AE-app-processing-secretases-via-the-melatonin-receptor-through-the-pin1-gsk3%C3%AE-nf-%C3%AE%C2%BAb-pathway-in-sh-sy5y-cells
#3
Vorapin Chinchalongporn, Mayuri Shukla, Piyarat Govitrapong
Melatonin is involved in the physiological regulation of the β- amyloid precursor protein (βAPP) cleaving secretases which are responsible for generation of the neurotoxic amyloid beta (Aβ) peptide, one of the hallmarks of Alzheimer's disease (AD) pathology. In this study, we aimed to determine the underlying mechanisms of this regulation under pathological conditions. We establish that melatonin prevents Aβ42 -induced down-regulation of a disintegrin and metalloproteinase domain-containing protein 10 (ADAM10) as well as up-regulation of β-site APP-cleaving enzyme 1 (BACE1) and presenilin 1 (PS1) in SH-SY5Y cell cultures...
January 20, 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29352407/-rhegmatogenous-retinal-detachment-epidemiology-and-risk-factors
#4
N E Bechrakis, A Dimmer
The incidence of rhegmatogenous retinal detachment in the European population is approximately 10 cases per 100,000 inhabitants per year and reaches a peak in the 6th and 7th decades of life, mostly in atemporal association with posterior vitreous body detachment. Known risk factors include myopia and higher axial length of the eye, male gender, previous trauma and vitreoretinal degeneration or dystrophy. In recent years, an increase in the risk of rhegmatogenous retinal detachment following cataract surgery was also found, especially after capsule rupture and vitreous body loss...
January 19, 2018: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29352267/differential-susceptibility-of-striatal-hippocampal-and-cortical-neurons-to-caspase-6
#5
Anastasia Noël, Libin Zhou, Bénédicte Foveau, P Jesper Sjöström, Andréa C LeBlanc
Active cysteinyl protease Caspase-6 is associated with early Alzheimer and Huntington diseases. Higher entorhinal cortex and hippocampal Caspase-6 levels correlate with lower cognitive performance in aged humans. Caspase-6 induces axonal degeneration in human primary neuron cultures and causes inflammation and neurodegeneration in mouse hippocampus, and age-dependent memory impairment. To assess whether Caspase-6 causes damage to another neuronal system, a transgenic knock-in mouse overexpressing a self-activated form of Caspase-6 five-fold in the striatum, the area affected in Huntington disease, and 2...
January 19, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29352260/effect-of-in-vitro-storage-duration-on-measured-mechanical-properties-of-brain-tissue
#6
Wei Zhang, Li-Fu Liu, Yue-Jiao Xiong, Yi-Fan Liu, Sheng-Bo Yu, Cheng-Wei Wu, Weihong Guo
Accurate characterization of the mechanical properties of brain tissue is essential for understanding the mechanisms of traumatic brain injuries and developing protective gears or facilities. However, how storage conditions might affect the mechanical properties of brain tissue remains unclear. The objective of this study is to investigate the effect of in vitro storage duration on the mechanical performance of brain tissue since measurements are usually carried out in vitro. Differential Scanning Calorimetry (DSC) measurements and uniaxial compression mechanical experiments are carried out...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352205/2-5-hexanedione-induces-dopaminergic-neurodegeneration-through-integrin-%C3%AE-m%C3%AE-2-nadph-oxidase-axis-mediated-microglial-activation
#7
Cong Zhang, Liyan Hou, Jie Yang, Yuning Che, Fuqiang Sun, Huihua Li, Qingshan Wang
Recent study demonstrated that chronic exposure to solvents increases the risk of Parkinson's disease (PD), the second most common neurodegenerative disorder characterized by progressive dopaminergic neurodegeneration in the substantia nigra (SN). n-Hexane, a widely used organic solvent, displays central-peripheral neurotoxicity, which is mainly mediated by its active metabolite, 2,5-hexanedione (HD). However, whether HD exposure contributes to PD remains unclear. In this study, we found that rats exposed to HD displayed progressive dopaminergic neurodegeneration in the nigrostriatal system...
January 19, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29352199/prevention-of-retinal-degeneration-in-a-rat-model-of-smith-lemli-opitz-syndrome
#8
Steven J Fliesler, Neal S Peachey, Josi Herron, Kelly M Hines, Nadav I Weinstock, Sriganesh Ramachandra Rao, Libin Xu
Smith-Lemli-Opitz Syndrome (SLOS) is a recessive human disease caused by defective cholesterol (CHOL) synthesis at the level of DHCR7 (7-dehydrocholesterol reductase), which normally catalyzes the conversion of 7-dehydrocholesterol (7DHC) to CHOL. Formation and abnormal accumulation of 7DHC and 7DHC-derived oxysterols occur in SLOS patients and in rats treated with the DHCR7 inhibitor AY9944. The rat SLOS model exhibits progressive and irreversible retinal dysfunction and degeneration, which is only partially ameliorated by dietary CHOL supplementation...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352194/sirt6-overexpression-suppresses-senescence-and-apoptosis-of-nucleus-pulposus-cells-by-inducing-autophagy-in-a-model-of-intervertebral-disc-degeneration
#9
Jian Chen, Jun-Jun Xie, Meng-Yun Jin, Yun-Tao Gu, Cong-Cong Wu, Wei-Jun Guo, Ying-Zhao Yan, Zeng-Jie Zhang, Jian-Le Wang, Xiao-Lei Zhang, Yan Lin, Jia-Li Sun, Guang-Hui Zhu, Xiang-Yang Wang, Yao-Sen Wu
Treatment of intervertebral disc degeneration (IDD) seeks to prevent senescence and death of nucleus pulposus (NP) cells. Previous studies have shown that sirt6 exerts potent anti-senescent and anti-apoptotic effects in models of age-related degenerative disease. However, it is not known whether sirt6 protects against IDD. Here, we explored whether sirt6 influenced IDD. The sirt6 level was reduced in senescent human NP cells. Sirt6 overexpression protected against apoptosis and both replicative and stress-induced premature senescence...
January 19, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29352102/teenage-onset-progressive-myoclonic-epilepsy-due-to-a-familial-c9orf72-repeat-expansion
#10
Jelle van den Ameele, Ivana Jedlickova, Anna Pristoupilova, Anne Sieben, Sara Van Mossevelde, Chantal Ceuterick-de Groote, Helena Hůlková, Radoslav Matej, Alfred Meurs, Christine Van Broeckhoven, Samuel F Berkovic, Patrick Santens, Stanislav Kmoch, Bart Dermaut
BACKGROUND: The progressive myoclonic epilepsies (PME) are a heterogeneous group of disorders in which a specific diagnosis cannot be made in a subset of patients, despite exhaustive investigation. C9orf72 repeat expansions are emerging as an important causal factor in several adult-onset neurodegenerative disorders, in particular frontotemporal lobar degeneration and amyotrophic lateral sclerosis. An association with PME has not been reported previously. OBJECTIVE: To identify the causative mutation in a Belgian family where the proband had genetically unexplained PME...
January 19, 2018: Neurology
https://www.readbyqxmd.com/read/29352010/genetics-of-syndromic-and-non-syndromic-mitral-valve-prolapse
#11
REVIEW
Thierry Le Tourneau, Jean Mérot, Antoine Rimbert, Solena Le Scouarnec, Vincent Probst, Hervé Le Marec, Robert A Levine, Jean-Jacques Schott
Mitral valve prolapse (MVP) is a common condition that affects 2%-3% of the general population. MVP is thought to include syndromic forms such as Marfan syndrome and non-syndromic MVP, which is the most frequent form. Myxomatous degeneration and fibroelastic deficiency (FED) are regarded as two different forms of non-syndromic MVP. While FED is still considered a degenerative disease associated with ageing, frequent familial clustering has been demonstrated for myxomatous MVP. Familial and genetic studies led to the recognition of reduced penetrance and large phenotypic variability, and to the identification of prodromal or atypical forms as a part of the complex spectrum of the disease...
January 19, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29351812/a-hybrid-protein-containing-msp1a-repeats-and-omp7-omp8-and-omp9-epitopes-protect-immunized-balb-c-mice-against-anaplasmosis
#12
Alex Sander R Cangussu, Luis André M Mariúba, Pritesh Lalwani, Keila Dayane E S Pereira, Spartaco Astolphi-Filho, Patricia P Orlandi, Sabrina Epiphanio, Kelvison F Viana, Mucio Flavio B Ribeiro, Hidelberto M Silva, Claudio R F Marinho, Paulo A Nogueira
Anaplasma marginale (A. marginale) has a remarkable impact on livestock production, and an effective vaccine is not currently available due to the inexistence of a small animal model. Recently, BALB/c mice were successfully infected with A. marginale, resulting in an acute and persistent anaplasmosis infection. Here, we designed a hybrid protein containing repeats of polypeptide 1a from major surface protein-1 complex (MSP1a) repeats and common epitopes of outer membrane proteins (OMPs) OMP7, OMP8 and OMP9 expressed in Escherichia coli...
January 19, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29351793/retinal-complications-of-gout-a-case-report-and-review-of-the-literature
#13
Ying Jiang, Jason E Brenner, William J Foster
BACKGROUND: There have been few reported findings of posterior segment complications of gout. While exudative lesions, an increased risk of macular degeneration, and vascular occlusions have been previously reported, to our knowledge, refractile macular lesions have not been reported in a patient with chronic uncontrolled gout. CASE PRESENTATION: Highly refractile, crystal-like lesions were found in the macula of a 62 year old male patient with chronically uncontrolled gout...
January 19, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29351788/elevated-inflammatory-cytokines-in-aqueous-cytokine-profile-in-hiv-1-infected-patients-with-cataracts-in-uganda
#14
Juliet Otiti-Sengeri, Robert Colebunders, Steven J Reynolds, Musa Muwonge, Getrude Nakigozi, Valerian Kiggundu, Fred Nalugoda, Damalie Nakanjako
BACKGROUND: Cataracts occur earlier among HIV-infected adults and this is attributed to various intraocular inflammatory processes that result in early degeneration. In this study we purposed to investigate whether HIV infected individuals with cataracts develop heightened intraocular inflammatory processes compared to their HIV negative counterparts by determining the concentration of 8 cytokines in the aqueous humour of HIV-positive adults with cataracts and their HIV-negative counterparts...
January 19, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29351407/pedf-expression-affects-the-oxidative-and-inflammatory-state-of-choroidal-endothelial-cells
#15
Mitra Farnoodian, Christine M Sorenson, Nader Sheibani
Age related macular degeneration (AMD) is the leading cause of vision loss among the elderly population, and is associated with severe macular degeneration and choroidal neovascularization (CNV). Although the pathogenesis of AMD is associated with choroidal dysfunction and CNV, the detailed underlying mechanisms remain unresolved. Altered production of pigment epithelium derived factor (PEDF), a neuroprotective and anti-angiogenic factor, contributes to CNV. Furthermore, exogenous PEDF mitigates angiogenesis in preclinical CNV models...
January 10, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29351386/protective-effect-of-c-peptide-on-experimentally-induced-diabetic-nephropathy-and-the-possible-link-between-c-peptide-and-nitric-oxide
#16
Eman A Elbassuoni, Neven M Aziz, Nashwa F El-Tahawy
Diabetic nephropathy one of the major microvascular diabetic complications. Besides hyperglycemia, other factors contribute to the development of diabetic complications as the proinsulin connecting peptide, C-peptide. We described the role of C-peptide replacement therapy on experimentally induced diabetic nephropathy, and its potential mechanisms of action by studying the role of Nitric oxide (NO) as a mediator of C-peptide effects by in vivo modulating its production by NG-nitro-L-arginine methyl ester (L-NAME)...
January 19, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29351358/microfluidics-based-subretinal-chemical-neuromodulation-of-photoreceptor-degenerated-retinas
#17
Corey M Rountree, John B Troy, Laxman Saggere
Purpose: Retinal prostheses can restore rudimentary vision in cases of photoreceptor degeneration through electrical stimulation, but face difficulties achieving high spatial resolution because electrical current is an inherently unnatural stimulus. We investigated the therapeutic feasibility of using patterned delivery of the glutamate neurotransmitter, a primary agent of natural synaptic communication of the retina, as a biomimetic chemical alternative to electrical current for neuromodulation of photoreceptor degenerate retina...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29351134/carotid-doppler-sonography-additional-tool-to-assess-hemodynamic-improvement-after-transcatheter-aortic-valve-implantation
#18
Valeria Cammalleri, Francesco Romeo, Massimo Marchei, Andrea Anceschi, Gianluca Massaro, Saverio Muscoli, Francesca De Persis, Massimiliano Macrini, Gian P Ussia
PURPOSE: The aim of our study was to assess the arterial cerebral blood flow variations in patients with aortic valve stenosis, immediately after the transcatheter aortic valve implantation (TAVI). METHODS: The study population includes 62 consecutive patients who underwent TAVI for aortic valve stenosis (95%) and sugical bioprosthesis degeneration (5%). Carotid Doppler examination was performed recording blood flow, systolic peak velocity, time average mean velocity and mean acceleration time at baseline, after balloon aortic valvuloplasty, and within 10 min after the device release...
January 17, 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29351004/duchenne-muscular-dystrophy-dmd-an-updated-review-of-common-available-therapies
#19
Arash Salmaninejad, Saeed Farajzadeh Valilou, Hadi Bayat, Nader Ebadi, Abdolreza Daraei, Meysam Yousefi, Abolfazl Nesaei, Majid Mojarrad
Duchenne muscular dystrophy (DMD) is a lethal progressive pediatric muscle disorder and genetically inherited as an X-linked disease that caused by mutations in the dystrophin gene. DMD leads to progressive muscle weakness, degeneration, and wasting; finally, follows with the premature demise in affected individual's due to respiratory and/or cardiac failure typically by age of 30. For decades, scientists tried massively to find an effective therapy method, but there is no absolute cure currently for patients with DMD, nevertheless, recent advanced progressions on the treatment of DMD will be hopeful in the future...
January 19, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29350907/excitatory-and-inhibitory-neuronal-circuits-in-the-spinal-cord-and-their-role-in-the-control-of-motor-neuron-function-and-degeneration
#20
Uri Nimrod Ramírez-Jarquín, Ricardo Tapia
The complex neuronal networks of the spinal cord coordinate a wide variety of motor functions, including walking, running and voluntary and involuntary movements. This is accomplished by different groups of neurons, called center pattern generators, which control left-right alternation and flexor-extensor patterns. These spinal circuits, located in the ventral horns, are formed by several neuronal types, and the specific function of most of them has been identified by means of studies in vivo and in the isolated spinal cord of mice harboring genetically induced ablation of specific neuronal populations...
January 19, 2018: ACS Chemical Neuroscience
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