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https://www.readbyqxmd.com/read/29677376/endothelial-protein-c-targeting-liposomes-show-enhanced-uptake-and-improved-therapeutic-efficacy-in-human-retinal-endothelial-cells
#1
Anthoula Arta, Anne Z Eriksen, Fredrik Melander, Paul Kempen, Michael Larsen, Thomas L Andresen, Andrew J Urquhart
Purpose: To determine whether human retinal endothelial cells (HRECs) express the endothelial cell protein C receptor (EPCR) and to realize its potential as a targeting moiety by developing novel single and dual corticosteroid-loaded functionalized liposomes that exhibit both enhanced uptake by HRECs and superior biologic activity compared to nontargeting liposomes and free drug. Methods: EPCR expression of HRECs was investigated through flow cytometry and Western blot assays...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29671386/k237-modified-thermosensitive-liposome-enhanced-the-delivery-efficiency-and-cytotoxicity-of-paclitaxel-in-vitro
#2
Xudong Fu, Yuanyuan Lu, Jiaping Guo, Hui Liu, Aiping Deng, Changchun Kuang, Xiangyang Xie
This study aimed to develop novel temperature-sensitive liposomes loading paclitaxel (PTX-TSL) and evaluate them in vitro to improve the delivery efficiency and targeting of PTX. K237 peptide was conjugated to the terminal NHS of 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[hydroxyl succinimidyl (polyethylene glycol)-(DSPE-PEG-NHS), and K237-modified PTX-TSL (K237-PTX-TSL) was prepared using a film dispersion method. K237-TSL encapsulation with calcein was synthesized and used to determine the cellular uptake of TSL...
April 19, 2018: Journal of Liposome Research
https://www.readbyqxmd.com/read/29668909/effect-of-ephedrine-on-gastric-conduit-perfusion-measured-by-laser-speckle-contrast-imaging-after-esophagectomy-a-prospective-in-vivo-cohort-study
#3
S M Jansen, D M de Bruin, M I van Berge Henegouwen, P R Bloemen, S D Strackee, D P Veelo, T G van Leeuwen, S S Gisbertz
Compromised perfusion due to ligation of arteries and veins in esophagectomy with gastric tube reconstruction often (5-20%) results in necrosis and anastomotic leakage, which relate to high morbidity and mortality (3-4%). Ephedrine is used widely in anesthesia to treat intraoperative hypotension and may improve perfusion by the increase of cardiac output and mean arterial pressure (MAP). This study tests the effect of ephedrine on perfusion of the future anastomotic site of the gastric conduit, measured by laser speckle contrast imaging (LSCI)...
April 13, 2018: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/29664983/longitudinal-quantification-of-retinal-nonperfusion-in-the-macula-of-eyes-with-retinal-vein-occlusion-receiving-anti-vegf-therapy-secondary-analysis-of-the-wave-randomized-trial
#4
William C Ou, Shaun I R Lampen, Charles C Wykoff
BACKGROUND AND OBJECTIVE: Longitudinal quantification of retinal nonperfusion (RNP) in eyes with retinal vein occlusion (RVO) undergoing anti-vascular endothelial growth factor therapy. PATIENTS AND METHODS: Thirty eyes with ischemic RVO were randomized to ranibizumab (Lucentis; Genentech, South San Francisco, CA) (monotherapy) or ranibizumab plus peripheral laser (combination therapy) in a 12-month, prospective trial. RNP on fluorescein angiography was quantified within the macula through 12 months of follow-up...
April 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29662298/anti-vegf-treatment-of-macular-edema-associated-with-retinal-vein-occlusion-patterns-of-use-and-effectiveness-in-clinical-practice-echo-study-report-2
#5
J Michael Jumper, Pravin U Dugel, Sanford Chen, Kevin J Blinder, John G Walt
Purpose: To evaluate the efficacy, safety, and injection frequency of vascular endothelial growth factor (VEGF) antagonists in the treatment of macular edema secondary to retinal vein occlusion (RVO) in clinical practice. Patients and methods: A multicenter retrospective study of the medical records of 165 patients (95 branch RVO, 70 central RVO) treated with at least three anti-VEGF injections in the study eye was conducted. Available data collected for at least 6 months after the first injection included Snellen best-corrected visual acuity (BCVA), central retinal thickness (CRT) by time-domain optical coherence tomography (TD-OCT) or spectral-domain optical coherence tomography (SD-OCT), anti-VEGF injections, other treatments/procedures for RVO, and adverse events...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29661662/multimodal-analysis-using-flowmeter-analysis-laser-doppler-spectrophotometry-and-indocyanine-green-videoangiography-for-the-detection-of-venous-compromise-in-flaps-in-rats
#6
Lucas M Ritschl, Leonard H Schmidt, Andreas M Fichter, Alexander Hapfelmeier, Klaus-Dietrich Wolff, Thomas Mücke
Venous congestion results in tissue damage and remains the most common failure of free microvascular transfer if it is not recognized early. The purpose of this experimental study was to evaluate venous congestion and describe the findings with two different monitoring tools. A standardized epigastric flap was raised, and total occlusion of the draining vein was temporarily applied for 4, 5, 6, or 7 h. Blood flow measurements, including laser-Doppler flowmetry, and tissue spectrophotometry (O2C) and indocyanine green (ICG) videoangiography using the FLOW® 800 tool, were performed systematically after each surgical step, an interval of venous occlusion, and 1 week of clinical observation...
March 30, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29661534/a-new-chlorin-formulation-promotes-efficient-photodynamic-action-in-choriocapillaris-of-rabbit-s-eyes
#7
Gustavo H A Salomao, Adjaci U Fernandes, Mauricio S Baptista, João Paulo Tardivo, Stella Gianssante, Juliana Mora Veridiano, Olga Maria S Toledo, Giuliana Petri, Denise Maria Christofolini, João Antonio Correa
Age-related macular degeneration (AMD) as well as other choroidal diseases, demand novel therapeutic methods. Photodynamic therapy (PDT), which uses light and photosensitizer (PS) to cause specific vascular occlusion in the macula, is an interesting alternative. The only drug approved for the PDT treatment of AMD (Verteporfin) has a natural tendency to aggregate, demanding an expensive separation procedure during purification. We report a novel and affordable PS that is intrinsically protected against aggregation, the Monomeric Chlorin at High Concentration (MCHC-Chlorin), whose liposomal formulation was developed to provoke effective photodynamic action on the choroidal vasculature...
April 4, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29655811/retrograde-endovenous-laser-therapy-facilitates-great-saphenous-vein-closure-in-the-setting-of-severe-vasospasm
#8
Ravi N Srinivasa, Rajiv N Srinivasa, Nathan Kafity, Michael Cline, Anthony N Hage, Joseph J Gemmete, Jeffrey Forris Beecham Chick
Antegrade access for endovenous laser therapy may be technically challenging due to patient body habitus, vasospasm, dehydration, and poor visibility of vasculature. This report describes a retrograde approach from the contralateral femoral vein to facilitate laser ablation of the great saphenous vein in the setting of vasospasm. Such a technique may provide a viable alternative in technically difficult situations.
April 12, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29652919/preparation-and-characterization-of-fe3o4-au-c225-composite-targeted-nanoparticles-for-mri-of-human-glioma
#9
Yaoqi Ge, Yuejiao Zhong, Guozhong Ji, Qianling Lu, Xinyu Dai, Zhirui Guo, Peng Zhang, Gang Peng, Kangzhen Zhang, Yuntao Li
OBJECTIVE: To study the characterization of Fe3O4@Au-C225 composite targeted MNPs. METHODS: Fe3O4@Au-C225 was prepared by the absorption method. The immunosorbent assay was used to evaluate its absorption efficiency at C225 Fc. ZETA SIZER3000 laser particle size analyzer, ultraviolet photometer and its characteristics were analyzed by VSM. the targeting effect of Fe3O4@Au-C225 composite targeted MNPs on U251 cells in vitro were detected by 7.0 Tesla Micro-MR; and subcutaneous transplanted human glioma in nude mice were performed the targeting effect in vivo after tail vein injection of Fe3O4@Au-C225 composite targeted MNPs by MRI...
2018: PloS One
https://www.readbyqxmd.com/read/29652086/five-year-follow-up-of-a-randomized-clinical-trial-comparing-open-surgery-foam-sclerotherapy-and-endovenous-laser-ablation-for-great-saphenous-varicose-veins
#10
S Vähäaho, K Halmesmäki, A Albäck, E Saarinen, M Venermo
BACKGROUND: New treatment methods have challenged open surgery as a treatment for great saphenous vein (GSV) insufficiency, the most common being ultrasound-guided foam sclerotherapy (UGFS) and endovenous laser ablation (EVLA). This study evaluated the long-term results of surgery, EVLA and UGFS in the treatment of GSV reflux. METHODS: Patients with symptomatic GSV reflux were randomized to undergo either open surgery, EVLA or UGFS. The main outcome measure was the occlusion rate of the GSV at 5 years after operation...
May 2018: British Journal of Surgery
https://www.readbyqxmd.com/read/29629297/influences-of-pinpoint-plantar-long-wavelength-infrared-light-irradiation-stress-free-therapy-on-chorioretinal-hemodynamics-atherosclerosis-factors-and-vascular-endothelial-growth-factor
#11
Keisou Ishimaru, Takuma Nakajima, Yoshihisa Namiki, Kenji Ryotokuji
Background: We previously reported that pinpoint plantar long-wavelength infrared light irradiation (stress-free therapy; SFT) is useful for alleviating insulin resistance and improving intracranial blood flow in patients with type 2 diabetes mellitus. This study was undertaken to evaluate the influences of SFT on chorioretinal hemodynamics (retinal artery and vein blood flows) as well as atherosclerosis-related factors (TG, LDL-C) and VEGF in patients with dyslipidemia. Methods: Four patients with dyslipidemia received 15-minute irradiation with a stress-free apparatus (far-infrared wavelength, 30 mW)...
March 2018: Integrative Medicine Research
https://www.readbyqxmd.com/read/29618679/low-risk-of-pulmonary-vein-stenosis-after-contemporary-atrial-fibrillation-ablation-lessons-from-repeat-procedures-after-radiofrequency-current-cryoballoon-and-laser-balloon
#12
Takahiko Nagase, Stefano Bordignon, Laura Perrotta, Fabrizio Bologna, Felix K Weise, Athanasios Konstantinou, Ritsushi Kato, Boris Schmidt, Julian K R Chun
BACKGROUND: The incidence of pulmonary vein stenosis (PVS) after AF ablation following contemporary procedures remains unclear. We compared the incidence of PVS/narrowing (PVS/N) after PV isolation (PVI) for (1) 3-D mapping-guided wide-area encircling irrigated radiofrequency current (RFC) ablation; (2) first-third-generation big cryoballoon (CB1-3) ablation; and (3) laser balloon (LB) ablation.Methods and Results:All patients undergoing a second procedure between January 2012 and November 2016 were subgrouped according to index ablation (PVI): RFC; CB; or LB...
April 5, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29603902/intravital-molecular-tagging-velocimetry-of-cerebral-blood-flow-using-evans-blue
#13
Anton A Namykin, Natalia A Shushunova, Maria V Ulanova, Oxana V Semyachkina-Glushkovskaya, Valery V Tuchin, Ivan V Fedosov
The effects of light-driven enhancement of Evans Blue dye complexes with blood plasma proteins were observed for the first time, both in vitro and in vivo. The possible background of the effect concerns the photochemical cis-trans isomerization of the azo dye molecules. The effect was induced in the solution with a red laser with a wavelength of 638 nm, which corresponds to the peak of the dye absorption. The lifetime of the enhanced fluorescence is approximately 1 s and enables its use as an optically tagged molecular flow tracer for blood flow velocity measurements...
March 30, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29602759/economic-implications-of-endovenous-great-saphenous-ablation-in-a-public-health-care-system
#14
Abdalla Butt, David Kopriva
BACKGROUND: In mid-2007, endovenous ablation (EVA) of the great saphenous vein was introduced into the publicly funded health care system in Saskatchewan, Canada. We hypothesize that the introduction of EVA resulted in a decrease in use of high ligation and stripping (HL/S), decreased costs to the health care system, and increased demand of patients for great saphenous vein ablative procedures. METHODS: We retrospectively reviewed administrative data to capture cases of HL/S between 2003 and 2014 and cases of EVA of the great saphenous vein (endovenous laser treatment and radiofrequency ablation) between 2007 and 2014...
March 27, 2018: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29600177/intravitreal-anti-vegf-agents-oral-glucocorticoids-and-laser-photocoagulation-combination-therapy-for-macular-edema-secondary-to-retinal-vein-occlusion-preliminary-report
#15
Xiao-Xiao Feng, Cheng Li, Wan-Wen Shao, Yong-Guang Yuan, Xiao-Bing Qian, Qi-Shan Zheng, Yu-Jie Li, Qian-Ying Gao
AIM: To evaluate the efficacy and safety of combined anti-vascular endothelial growth factor (VEGF) agents, oral glucocorticoid, and laser photocoagulation therapy for macular edema (ME) secondary to retinal vein occlusion (RVO). METHODS: This study included 16 eyes of 16 patients with RVO-associated ME. Patients were initially treated with oral prednisone and an intravitreal anti-VEGF agent. Two weeks later, patients underwent standard laser photocoagulation. Best-corrected visual acuity (BCVA), central retinal thickness (CRT), and retinal vessel oxygenation were examined over 12mo...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29595735/a-new-composite-eyeball-periorbital-transplantation-model-in-humans-an-anatomical-study-in-preparation-for-eyeball-transplantation
#16
Maria Siemionow, Mehmet Bozkurt, Fatih Zor, Yalcin Kulahci, Safak Uygur, Can Ozturk, Risal Djohan, Frank Papay
BACKGROUND: Vascularized composite allotransplantation offers a new hope for restoration of orbital content and perhaps vision. The aim of this study was to introduce a new composite eyeball-periorbital transplantation model in fresh cadavers in preparation for composite eyeball allotransplantation in humans. METHODS: The composite eyeball-periorbital transplantation flap borders included the inferior border, outlined by the infraorbital rim; the medial border, created by the nasal dorsum; the lateral border, created by the lateral orbital rim; and the superior border, created by the superior part of the eyebrow...
April 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29582974/contemporary-tools-in-avm-surgery
#17
Marco Cenzato, Flavia Dones, Davide Boeris, Eleonora Marcati, Alessia Fratianni, Francesco M Crisà, Alberto Debernardi
Arteriovenous malformations (AVMs) are rare entities and therefore considered the main challenge for a neurosurgeon. Since the publication of the ARUBA study, one of the most popular debate regards the actual surgical indication for unruptured AVMs. Our group recently published a multicenter review of more than 500 cases underlying the important role of surgery. In the last decades, the expanding technologies used in the treatment of AVMs have shown an ongoing improvement overcoming some of the existing difficulties and shortcomings...
March 26, 2018: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29582749/is-radiofrequency-ablation-of-varicose-veins-a-valuable-option-a-systematic-review-of-the-literature-with-a-cost-analysis
#18
Thomas G Poder, Jean-François Fisette, Suzanne K Bédard, Marc-Antoine Despatis
BACKGROUND: Since the 1990s, new techniques for the treatment of varicose veins have emerged, including radiofrequency ablation (RFA) and laser treatment. We performed a study to compare the safety, efficacy and outcomes of RFA compared to those of open surgery and laser ablation for the treatment of varicose veins. We also carried out a cost analysis of RFA compared to open surgery to assess whether RFA could help free up operating room time by being performed in an outpatient context...
April 2018: Canadian Journal of Surgery. Journal Canadien de Chirurgie
https://www.readbyqxmd.com/read/29561271/convectively-dominated-heparin-leakage-from-multiple-catheter-designs-an-in-vitro-experimental-study
#19
Michael Coleman Barbour, Kenneth W Gow, Alberto Aliseda
Central venous catheters (CVCs) are routinely filled with a heparin lock while not in use to avoid thrombus formation near the tip. However, heparin leakage is known to occur, and the lock effectiveness remains in question. It was recently shown that convective fluxes from the blood flow in the host vein transport the majority of locking solution away from the tip of hemodialysis catheters immediately after instillation. Combined with the low diffusivity of heparin, this results in concentrations of heparin at the catheter tip that are orders of magnitude lower than at instillation for the majority of the interdialytic phase, diminishing the antithrombotic effectiveness of the lock...
March 16, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29554389/swept-source-oct-angiographic-imaging-of-a-central-retinal-vein-occlusion-during-pregnancy
#20
Elie Motulsky, Fang Zheng, Guanghui Liu, Giovanni Gregori, Philip J Rosenfeld
To avoid fluorescein angiography in a pregnant woman diagnosed with a central retinal vein occlusion (CRVO), swept-source optical coherence tomography angiography (SS-OCTA) was performed and showed no evidence of decreased central retinal perfusion leading to the diagnosis of a nonischemic CRVO. Five months after an intravitreal injection of steroid, both her vision and the retinal appearance had returned to normal. This case demonstrates how a noninvasive, safe, 12 mm × 12 mm SS-OCTA image of a CRVO is useful in evaluating the retinal perfusion at presentation and follow-up during pregnancy...
March 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
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