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https://www.readbyqxmd.com/read/28926988/quality-assessment-of-platelet-rich-fibrin-like-matrix-prepared-from-whole-blood-samples-after-extended-storage
#1
Hideo Kawabata, Kazushige Isobe, Taisuke Watanabe, Toshimitsu Okudera, Masayuki Nakamura, Masashi Suzuki, Jietsu Ryu, Yutaka Kitamura, Hajime Okudera, Kazuhiro Okuda, Koh Nakata, Tomoyuki Kawase
The platelet-rich fibrin-like matrix (PRFM) is usually prepared onsite and immediately used for regenerative therapy. Nonetheless, to meet the clinical necessity of preserving the PRFM without quality deterioration, we developed a method for preparation of PRFMs from short-term-stored whole blood (WB) samples. In this study, to evaluate the practical expiration date of storage, we extended the storage time of WB samples from 2 to 7 days and assessed the quality of the resulting PRFMs. WB samples collected with acid-citrate-dextrose were stored with gentle agitation at ambient temperature...
September 18, 2017: Biomedicines
https://www.readbyqxmd.com/read/28884176/morphometric-characterization-of-fibrinogen-s-%C3%AE-c-regions-and-their-role-in-fibrin-self-assembly-and-molecular-organization
#2
Anna D Protopopova, Rustem I Litvinov, Dennis K Galanakis, Chandrasekaran Nagaswami, Nikolay A Barinov, Alexander R Mukhitov, Dmitry V Klinov, John W Weisel
The flexible C-terminal parts of fibrinogen's Aα chains named the αC regions have been shown to play a role in fibrin self-assembly, although many aspects of their structure and functions remain unknown. To examine the involvement of the αC regions in the early stages of fibrin formation, we used high-resolution atomic force microscopy to image fibrinogen and oligomeric fibrin. Plasma-purified full-length human fibrinogen or des-αC fibrinogen lacking most of the αC regions, untreated or treated with thrombin, was imaged...
September 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28867375/calcified-plaque-modification-alters-local-drug-delivery-in-the-treatment-of-peripheral-atherosclerosis
#3
Abraham R Tzafriri, Fernando Garcia-Polite, Brett Zani, James Stanley, Benny Muraj, Jennifer Knutson, Robert Kohler, Peter Markham, Alexander Nikanorov, Elazer R Edelman
BACKGROUND: Calcific atherosclerosis is a major challenge to intraluminal drug delivery in peripheral artery disease (PAD). OBJECTIVES: We evaluated the effects of orbital atherectomy on intraluminal paclitaxel delivery to human peripheral arteries with substantial calcified plaque. METHODS: Diagnostic angiography and 3-D rotational imaging of five fresh human lower limbs revealed calcification in all main arteries. The proximal or distal segment of each artery was treated using an orbital atherectomy system (OAS) under simulated blood flow and fluoroscopy...
September 1, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28843033/hemodynamic-analysis-of-a-novel-bioresorbable-scaffold-in-porcine-coronary-artery-model
#4
Erhan Tenekecioglu, Ryo Torii, Christos V Bourantas, Rafael Cavalcante, Yohei Sotomi, Yaping Zeng, Carlos Collet, Tom Crake, Alexandre Abizaid, Yoshinobu Onuma, Solomon Su, Teguh Santoso, Patrick W Serruys
BACKGROUND: The shear stress distribution assessment can provide useful insights for the hemodynamic performance of the implanted stent/scaffold. Our aim was to investigate the effect of a novel bioresorbable scaffold, Mirage on local hemodynamics in animal models. METHOD: The main epicardial coronary arteries of 7 healthy mini-pigs were implanted with 11 Mirage Microfiber sirolimus-eluting Bioresorbable Scaffolds (MMSES). Optical coherence tomography (OCT) was performed post scaffold implantation and the obtained images were fused with angiographic data to reconstruct the coronary artery anatomy...
August 26, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28815276/determination-of-89-drugs-and-other-micropollutants-in-unfiltered-wastewater-and-freshwater-by-lc-ms-ms-an-alternative-sample-preparation-approach
#5
Alexandros G Asimakopoulos, Pranav Kannan, Sean Higgins, Kurunthachalam Kannan
A liquid chromatography-triple quadrupole-tandem mass spectrometry (LC-qQq-MS/MS) method was developed for simultaneous determination of 89 legal neuropsychiatric pharmaceuticals and illicit drugs (both parent compounds and metabolites) and other micropollutants in unfiltered wastewater and freshwater. The target chemicals fall under the classes of amphetamine-type stimulants, cocaine compounds, opiates and opioids, benzodiazepines, lysergic compounds, antipsychotics, anesthetics, antiepileptics, antidepressants, sympathomimetics, cannabinoids, blood thinners, antihistamines, β-blockers, caffeine derivatives, nicotine derivatives, z-drugs, new designer drugs, and Alzheimer medications...
August 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28780813/-delayed-effect-of-liver-injury-and-metabolism-of-dimethylformamide-after-high-exposures-in-rats
#6
Z J Wu, M Y Guan, M Zheng, M Zhang, W J Zhao, L J Shao, Y C Zhai, Y L Zhu, J Cheng
Objective: To investigate the delayed effect of liver injury and metabolism of dimethylformamide (DMF) after high exposures in rats. Methods: A total of 12 rats were randomly divided into four groups and 3 rats were in each group. Rats in 1d DMF+2 d delayed group were dosed for 1 day and rested for 2 days, and sacrificed at the 4th day. Rats in 3 d DMF group were dosed for 3 days and sacrificed at the 4th day. Rats in 3 d DMF+3 d delayed group were dosed for 3 days and rested for 3 days, and sacrificed at the 7th day...
June 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28687753/development-of-novel-mouse-model-of-ulcers-induced-by-implantation-of-magnets
#7
Yuriko Takeuchi, Koji Ueno, Takahiro Mizoguchi, Makoto Samura, Takasuke Harada, Atsunori Oga, Tomoaki Murata, Tohru Hosoyama, Noriyasu Morikage, Kimikazu Hamano
We developed a novel mouse model of human refractory cutaneous ulcers that more faithfully reflects pathology and evaluated the effects of mixed cell sheets comprising peripheral blood mononuclear cells and fibroblasts, which we previously developed for treating refractory cutaneous ulcers. Model development involved sandwiching the skin between two magnets, one of which was implanted under the skin for 7 consecutive days. This magnet-implanted ulcer model produced persistently large amounts of exudate and induced the infiltration of the ulcer with inflammatory cells...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28643042/oct-in-alzheimer-s-disease-thinning-of-the-rnfl-and-superior-hemiretina
#8
João Paulo Cunha, Rita Proença, Arnaldo Dias-Santos, Rita Almeida, Helena Águas, Marta Alves, Ana Luísa Papoila, Carlota Louro, António Castanheira-Dinis
BACKGROUND: Peripapillary retinal nerve fiber layer (pRNFL) and internal macular layer thinning have been demonstrated in Alzheimer's disease (AD) with optical coherence tomography (OCT) studies. The purpose of this study is to compare the pRNFL thickness and overall retinal thickness (RT) in AD patients with non-AD patients, using spectral domain optical coherence tomography (SD-OCT) and determine the sectors most characteristically affected in AD. METHODS: A cross-sectional study was performed to determine the pRNFL and overall macular RT thicknesses in AD and non-AD patients, attending a tertiary hospital center...
June 22, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28577053/regenerative-properties-of-collagenated-porcine-bone-grafts-in-human-maxilla-demonstrative-study-of-the-kinetics-by-synchrotron-radiation-microtomography-and-light-microscopy
#9
Alessandra Giuliani, Giovanna Iezzi, Serena Mazzoni, Adriano Piattelli, Vittoria Perrotti, Antonio Barone
OBJECTIVES: Recently, it has been reported that heterologous biomaterials, where the collagen matrix is preserved, seem to facilitate blood clotting and the subsequent invasion of repairing and regenerative cells. This study aimed at evaluating the healing of human extraction sockets grafted with a collagenated cortico-cancellous porcine bone (mp3®, OsteoBiol®, Tecnoss®, Giaveno, Italy) by synchrotron radiation X-ray microtomography (microCT) and histology in order to have a 3D quantitative characterization over time...
June 2, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28504989/structural-behavior-of-the-endothelial-glycocalyx-is-associated-with-pathophysiologic-status-in-septic-mice-an-integrated-approach-to-analyzing-the-behavior-and-function-of-the-glycocalyx-using-both-electron-and-fluorescence-intravital-microscopy
#10
Hanae Kataoka, Akira Ushiyama, Yoshihiro Akimoto, Sachie Matsubara, Hayato Kawakami, Takehiko Iijima
BACKGROUND: The endothelial surface layer (ESL) regulates vascular permeability to maintain fluid homeostasis. The glycocalyx (GCX), which has a complex and fragile ultrastructure, is an important component of the ESL. Abnormalities of the GCX have been hypothesized to trigger pathological hyperpermeability. Here, we report an integrated in vivo analysis of the morphological and functional properties of the GCX in a vital organ. METHODS: We examined the behavior of the ESL and GCX, using both electron microscopy (EM) and intravital microscopy (IVM)...
September 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28493982/comparison-of-spectral-domain-optical-coherence-tomography-for-intra-retinal-layers-thickness-measurements-between-healthy-and-diabetic-eyes-among-chinese-adults
#11
COMPARATIVE STUDY
Shu-Ting Li, Xiang-Ning Wang, Xin-Hua Du, Qiang Wu
PURPOSE: To compare intra-retinal layer thickness measurements between eyes with no or mild diabetic retinopathy (DR) and age-matched controls using Spectralis spectral-domain optical coherence tomography (SD-OCT). METHODS: Cross-sectional observational analysis study. High-resolution macular volume scans (30° * 25°) were obtained for 133 type 2 diabetes mellitus (T2DM) patients with no DR, 42 T2DM patients with mild DR and 115 healthy controls. The mean thickness was measured in all 9 Early Treatment Diabetic Retinopathy Study (ETDRS) sectors for 8 separate layers, inner retinal layer (IRL), outer retinal layer (ORL) and total retina (TR), after automated segmentation...
2017: PloS One
https://www.readbyqxmd.com/read/28493931/asymptomatic-carotid-artery-stenosis-and-retinal-nerve-fiber-layer-thickness-a-community-based-observational-study
#12
Dandan Wang, Yang Li, Yong Zhou, Cheng Jin, Qi Zhao, Anxin Wang, Shouling Wu, Wen Bin Wei, Xingquan Zhao, Jost B Jonas
PURPOSE: To examine whether an abnormally thin retinal nerve fiber layer (RNFL) is associated with cerebrovascular insufficiency. DESIGN: Community-based study. METHODS: The Asymptomatic Polyvascular Abnormalities in Community Study included Chinese aged 40+ years and without histories of cerebrovascular incidents or coronary heart disease. Using transcranial Doppler and carotid duplex ultrasound examination, we assessed presence and degree of an intracranial arterial stenosis (ICAS) and extracranial carotid arterial stenosis (ECAS) and we measured the RNFL thickness by spectral-domain optical coherence tomography...
2017: PloS One
https://www.readbyqxmd.com/read/28439569/the-obesity-paradox-in-kidney-disease-how-to-reconcile-it-with-obesity-management
#13
Kamyar Kalantar-Zadeh, Connie M Rhee, Jason Chou, S Foad Ahmadi, Jongha Park, Joline Lt Chen, Alpesh N Amin
Obesity, a risk factor for de novo chronic kidney disease (CKD), confers survival advantages in advanced CKD. This so-called obesity paradox is the archetype of the reverse epidemiology of cardiovascular risks, in addition to the lipid, blood pressure, adiponectin, homocysteine, and uric acid paradoxes. These paradoxical phenomena are in sharp contradistinction to the known epidemiology of cardiovascular risks in the general population. In addition to advanced CKD, the obesity paradox has also been observed in heart failure, chronic obstructive lung disease, liver cirrhosis, and metastatic cancer, as well as in the elderly...
March 2017: KI Reports
https://www.readbyqxmd.com/read/28422916/beware-of-the-interval-cholecystectomy
#14
James Ackerman, Ryan Abegglen, Mark Scaife, Andrew Peitzman, Matthew Rosengart, J Wallis Marsh, Kurt R Stahlfeld
BACKGROUND: Despite limited data regarding the indications and effectiveness of percutaneous cholecystostomy (PC) in the treatment of acute cholecystitis (AC), usage has increased by over 500% since 1994. Many of these patients subsequently undergo interval cholecystectomy (IC), a procedure that has not been rigorously evaluated. This aim of this study was to quantify the morbidity and mortality associated with the IC. METHODS: We included all consecutive adult patients (>18 years old) who underwent PC and IC from January 2008 to December 2013...
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28358939/peripapillary-retinal-nerve-fiber-layer-vascular-microcirculation-in-eyes-with-glaucoma-and-single-hemifield-visual-field-loss
#15
Chieh-Li Chen, Karine D Bojikian, Joanne C Wen, Qinqin Zhang, Chen Xin, Raghu C Mudumbai, Murray A Johnstone, Philip P Chen, Ruikang K Wang
Importance: Understanding the differences in vascular microcirculation of the peripapillary retinal nerve fiber layer (RNFL) between the hemispheres in eyes with glaucoma with single-hemifield visual field (VF) defects may provide insight into the pathophysiology of glaucoma. Objective: To investigate the changes in the microcirculation of the peripapillary RNFL of eyes with glaucoma by using optical microangiography. Design, Setting, and Participants: Eyes with glaucoma and single-hemifield VF defect and normal eyes underwent scanning using an optical microangiography system covering a 6...
May 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28345986/children-and-young-people-with-diabetes-recognition-and-management
#16
Hamish Hamilton, Grace Knudsen, Camelia Laura Vaina, Michelle Smith, Siba Prosad Paul
Diabetes mellitus (type 1) is an autoimmune condition leading to absolute insulin deficiency resulting in hyperglycaemia and its associated manifestations. It is the most common type of diabetes seen in children, characterised by the 4Ts (toilet, thinner, thirsty, tired). The signs and symptoms can sometimes be non-specific and a delay or missed diagnosis may be catastrophic to the health of the child. Children with an established diagnosis of diabetes often present to the health service with issues such as hypoglycaemia, hyperglycaemia, or diabetic ketoacidosis...
March 23, 2017: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/28342641/procedure-specific-risks-of-thrombosis-and-bleeding-in-urological-cancer-surgery-systematic-review-and-meta-analysis
#17
REVIEW
Kari A O Tikkinen, Samantha Craigie, Arnav Agarwal, Philippe D Violette, Giacomo Novara, Rufus Cartwright, Richard Naspro, Reed A C Siemieniuk, Bassel Ali, Leyla Eryuzlu, Johanna Geraci, Judi Winkup, Daniel Yoo, Michael K Gould, Per Morten Sandset, Gordon H Guyatt
CONTEXT: Pharmacological thromboprophylaxis involves balancing a lower risk of venous thromboembolism (VTE) against a higher risk of bleeding, a trade-off that critically depends on the risks of VTE and bleeding in the absence of prophylaxis (baseline risk). OBJECTIVE: To provide estimates of the baseline risk of symptomatic VTE and bleeding requiring reoperation in urological cancer surgery. EVIDENCE ACQUISITION: We identified contemporary observational studies reporting symptomatic VTE or bleeding after urological procedures...
March 23, 2017: European Urology
https://www.readbyqxmd.com/read/28329664/prospective-evaluation-of-complications-in-dermatologic-surgery-associated-with-hypertension-conroy
#18
Conroy Chow, Matthew J Simpson, Niko Pascua, Harjot Maan, Jacqueline G Berlier, Siegrid Yu, Isaac Neuhaus, Roy Grekin, Sarah T Arron
BackgroundPoorly controlled hypertension is a known risk factor for surgical complications. OBJECTIVE: This study examines the incidence of complications in participants undergoing Mohsmicrographic surgery (MMS) based on preoperative blood pressure (BP) measurement and investigates the role of potential confounders in the relationship between preoperative BP and postoperative complications.MethodsThis 10-month prospective cohort study at the University of California, San Francisco (UCSF) Dermatologic Surgery Center approached all patients undergoing MMS for participation and assessed for the diagnosis of hypertension, anti-hypertensive medication use, use of tobacco or blood thinners, immunosuppression, concomitant diabetes, or previous treatment with radiation therapy at the surgical site...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28263259/head-down-posture-in-glaucoma-suspects-induces-changes-in-iop-systemic-pressure-and-perg-that-predict-future-loss-of-optic-nerve-tissue
#19
Vittorio Porciatti, William J Feuer, Pedro Monsalve, Giacinto Triolo, Luis Vazquez, John McSoley, Lori M Ventura
PURPOSE: To obtain pilot data on posture-induced changes of intraocular pressure (IOP), systemic pressure, and pattern electroretinogram (PERG) predictive of future optic nerve tissue loss glaucoma suspects (GSs). METHODS: Mean peripapillary retinal fiber layer thickness (RNFLT) was measured with optical coherence tomography 2 times/year in 28 GS aged 58±8.9 years over 5.0±0.73 years. All patients had a baseline PERG, IOP, and brachial blood pressure measurements in the seated and -10 degrees head-down-body-tilt (HDT) position...
May 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28248627/does-health-information-in-mass-media-help-or-hurt-patients-investigation-of-potential-negative-influence-of-mass-media-health-information-on-patients-beliefs-and-medication-regimen-adherence
#20
Heewon Im, Jisu Huh
As an important public health issue, patient medication non-adherence has drawn much attention, but research on the impact of mass media as an information source on patient medication adherence has been scant. Given that mass media often provide confusing and contradicting information regarding health/medical issues, this study examined the potential negative influence of exposure to health information in mass media on patients' beliefs about their illnesses and medications, and medication adherence, in comparison with the effects of exposure to another primary medication information source, physicians...
March 2017: Journal of Health Communication
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