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Ablation Techniques

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https://www.readbyqxmd.com/read/28820286/autophagy-monitoring-and-autophagy-deficient-mice
#1
Akiko Kuma, Masaaki Komatsu, Noboru Mizushima
Discovery of yeast autophagy-related (ATG) genes and subsequent identification of their homologs in other organisms have enabled researchers to investigate physiological functions of macroautophagy/autophagy using genetic techniques. Specific identification of autophagy-related structures is important to evaluate autophagic activity, and specific ablation of autophagy-related genes is a critical means to determine the requirements of autophagy. Here, we review currently available mouse models, particularly focusing on autophagy (and mitophagy) indicator models and systemic autophagy-related gene-knockout mouse models...
August 18, 2017: Autophagy
https://www.readbyqxmd.com/read/28819981/highly-efficient-guiding-of-motile-microtubules-on-non-topographical-motor-patterns
#2
Cordula Reuther, Matthäus Mittasch, Sundar Naganathan, Stephan Grill, Stefan Diez
Molecular motors, highly-efficient biological nano-machines, hold the potential to be employed for a wide range of nanotechnological applications. Towards this end, kinesin, dynein or myosin motor proteins are commonly surface-immobilized within engineered environments in order to transport cargo attached to cytoskeletal filaments. Being able to flexibly control the direction of filament motion - in particular on planar, non-topographical surfaces - has, however, remained challenging. Here, we demonstrate the applicability of a UV-laser-based ablation technique to programmably generate highly-localized patterns of functional kinesin-1 motors with different shapes and sizes on PLL-g-PEG-coated polystyrene surfaces...
August 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28819902/ablation-therapy-for-barrett-s-esophagus-new-rules-for-changing-times
#3
REVIEW
Nour Hamade, Prateek Sharma
PURPOSE OF REVIEW: In this review, we discuss different endoscopic techniques in the eradication of Barrett's esophagus (BE) as well as some controversies in the field of treatment. RECENT FINDINGS: Patients with T1a esophageal adenocarcinoma and BE of high-grade dysplasia should undergo endoscopic ablative therapy. The most studied technique to date is radiofrequency ablation. It can be combined with endoscopic mucosal resection in cases containing nodular and flat lesions...
August 17, 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28819227/suspected-limited-mobility-of-a-middle-pleistocene-woman-from-southern-italy-strontium-isotopes-of-a-human-deciduous-tooth
#4
Federico Lugli, Anna Cipriani, Julie Arnaud, Marta Arzarello, Carlo Peretto, Stefano Benazzi
We present the Sr isotopic composition of enamel of the most ancient deciduous tooth ever discovered in Italy to assess human mobility in Middle Pleistocene. Reconstructing ancient mobility is crucial for understanding human strategy at exploiting temporally and spatially patchy resources, with most studies focusing on indirect evidences, ultimately affecting our interpretation on hominin territoriality and energetic costs invested by hominin groups. Here, we use the high spatial resolution and micro-destructivity options offered by the Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry technique, to determine the (87)Sr/ (86)Sr intra-tooth variability of a human deciduous incisor from the Middle Pleistocene layers of the Isernia La Pineta site (Italy)...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818491/cryotherapy-versus-high-intensity-focused-ultrasound-for-treating-prostate-cancer-oncological-and-functional-results
#5
F Donis Canet, M D Sánchez Gallego, F Arias Fúnez, G Duque Ruíz, I Laso, J Brasero Burgos, J Lorca Álvaro, V Gómez Dos Santos, R Rodríguez Patrón, F J Burgos Revilla
CONTEXT AND OBJECTIVE: The increasingly early diagnosis of prostate cancer requires a search for therapeutic alternatives with good oncological results that in turn facilitate a good long-term quality of life. This review analyses 2 minimally invasive therapies for treating localised prostate cancer in terms of oncological and functional results, as well as the complications resulting from the therapies. ACQUISITION OF EVIDENCE: A systematic literature review was conducted of the treatment of localised prostate cancer with 2 ablative techniques as the primary therapy: cryosurgery or cryotherapy and high intensity focused ultrasound (HIFU)...
August 14, 2017: Actas Urologicas Españolas
https://www.readbyqxmd.com/read/28817821/endoscopic-lung-volume-reduction-an-expert-panel-recommendation-update-2017
#6
Felix J F Herth, Dirk-Jan Slebos, Gerard J Criner, Pallav L Shah
Interest in endoscopic lung volume reduction (ELVR) technologies for emphysema is consistently growing. In the last couple of months, several endoscopic options (e.g., endo- or intrabronchial valves, coil implants, and thermal vapor ablation) that have been evaluated in randomized controlled trials have been reported with the ultimate goal of improving respiratory mechanics and alleviating chronic dyspnea. Patients presenting with severe air trapping and thoracic hyperinflation have the greatest potential to derive benefit from ELVR procedures...
August 18, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28817399/chemotherapy-for-oligometastatic-prostate-cancer
#7
Tanya B Dorff, Christopher J Sweeney
PURPOSE OF REVIEW: To analyze recent trials of upfront chemotherapy to determine how this paradigm can be applied to oligometastatic prostate cancer patients. RECENT FINDINGS: Upfront chemotherapy prolongs survival in metastatic prostate cancer, according to the ChemoHormonal Therapy versus Androgen Ablation Randomized Trial for Extensive Disease in Prostate Cancer and STAMPEDE docetaxel trials. However, the benefit is driven by the high volume subset and may not apply to low-volume/oligometastatic patients...
August 16, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28812144/-trends-in-ablation-surgery-what-has-changed-compared-to-2001
#8
C V Fischer, M Kulanga, H Hoerauf
INTRODUCTION: In 2001 a survey among retinal surgeons regarding the treatment of rhegmatogenous retinal detachment either with scleral buckling methods or primary vitrectomy was performed. Due to the technical progress of vitrectomy and observational systems, it seemed appropriate to renew and update this survey supplemented with current aspects. METHODS: In this study 78 vitreoretinal surgeons from German-speaking countries were surveyed via an anonymous online questionnaire on their treatment decisions for defined retinal detachment constellations...
August 15, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28812067/nonlinear-imaging-microscopy-for-assessing-structural-and-photochemical-modifications-upon-laser-removal-of-dammar-varnish-on-photosensitive-substrates
#9
M Oujja, S Psilodimitrakopoulos, E Carrasco, M Sanz, A Philippidis, A Selimis, P Pouli, G Filippidis, M Castillejo
The nonlinear optical microscopy (NLM) modalities of Multi-Photon Excited Fluorescence (MPEF) and Third Harmonic Generation (THG) have been combined in this work to characterize as a function of depth with micrometric resolution the type and extent of morphological and photochemical modifications that take place upon ultraviolet (UV) pulsed laser removal of a dammar varnish layer applied on a photosensitive substrate. The latter consists on a layer of the synthetic polymer poly-methyl methacrylate doped with a photosensitizer, the aromatic compound 1,4-di[2-(5-phenyloxazolyl)] benzene, that strongly fluoresces upon UV light illumination...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28812002/image-guided-thermal-ablation-with-mr-based-thermometry
#10
REVIEW
Mingming Zhu, Ziqi Sun, Chin K Ng
Thermal ablation techniques such as radiofrequency, microwave, high intensity focused ultrasound (HIFU) and laser have been used as minimally invasive strategies for the treatment of variety of cancers. MR thermometry methods are readily available for monitoring thermal distribution and deposition in real time, leading to decrease of incidents of normal tissue damage around targeted lesion. HIFU and laser-induced thermal therapy (LITT) are the two widely accepted tumor ablation techniques because of their compatibility with MR systems...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28811080/mechanochemical-ablation-for-treatment-of-truncal-venous-insufficiency-a-review-of-the-current-literature
#11
REVIEW
James J Sun, Mohammed M Chowdhury, Umar Sadat, Paul D Hayes, Tjun Y Tang
Mechanochemical ablation (MOCA) is a nonthermal nontumescent technique used in the treatment of superficial venous disease. This review analyzed the available data on the efficacy and safety of MOCA. A systematic literature search was performed. Of 101 studies identified, 14 were suitable for inclusion. The studies were found to be heterogeneous in design, and the quality of evidence was found to be low or very low. MOCA was demonstrated to be effective in the short-term with minimal complications. Consensus guidelines and definitions of reporting outcome measures must be standardized to allow comparison with other techniques...
August 12, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28811021/quantitative-analysis-of-major-and-trace-elements-in-nh4hf2-modified-silicate-rock-powders-by-laser-ablation-inductively-coupled-plasma-mass-spectrometry
#12
Wen Zhang, Zhaochu Hu, Yongsheng Liu, Wenwu Yang, Haihong Chen, Shenghong Hu, Hongyan Xiao
In this paper, we described a NH4HF2 digestion method as sample preparation for the rapid determination of major and trace elements in silicate rocks using laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS). Sample powders digested by NH4HF2 at 230 °C for 3 h form ultrafine powders with a typical grain size d80 < 8.5 μm, and various silicate rocks have a consistent grain morphology and size, allowing us to produce pressed powder pellets that have excellent cohesion and homogeneity suitable for laser ablation micro-analysis without the addition of binder...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28809681/a-prototype-therapy-system-for-transcutaneous-application-of-boiling-histotripsy
#13
Adam D Maxwell, Petr V Yuldashev, Wayne Kreider, Tatiana D Khokhlova, George R Schade, Timothy L Hall, Oleg A Sapozhnikov, Michael R Bailey, Vera A Khokhlova
Boiling histotripsy is a method of focused ultrasound surgery that noninvasively applies millisecond-length pulses with high-amplitude shock fronts to generate liquefied lesions in tissue. Such a technique requires unique outputs compared to a focused ultrasound thermal therapy apparatus, particularly to achieve high in situ pressure levels through intervening tissue. This article describes the design and characterization of a system capable of producing the necessary pressure to transcutaneously administer boiling histotripsy therapy through clinically relevant overlying tissue paths using pulses with duration up to 10 ms...
August 14, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28807571/radiofrequency-ablation-for-osteoid-osteoma-recurrence-rates-and-predictive-factors
#14
David W Shields, Sadaf Sohrabi, Evan O Crane, Chris Nicholas, Ashish Mahendra
BACKGROUND AND PURPOSE: Osteoid osteoma is an infrequent but debilitating benign bone lesion which can be successfully managed by percutaneous radiofrequency ablation (RFA). There are few studies investigating the efficacy and follow-up of this treatment. An arbitrary upper limit of 15 mm has been used to differentiate between osteoid osteoma and osteoblastoma with surgery used for lesions above this limit. We aimed to analyse the cases identified from our prospectively maintained database over a ten year period since adoption of this technique in our unit...
August 11, 2017: Surgeon: Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland
https://www.readbyqxmd.com/read/28807252/role-of-hepatic-trisectionectomy-in-advanced-hepatocellular-carcinoma
#15
J S Tsang, K S H Chok, C M Lo
BACKGROUND: Advanced hepatocellular carcinoma (HCC) with underlying cirrhosis poses a major operative challenge. Patients have a dismal prognosis without curative resection. The role of hepatic trisectionectomy in these patients is not established. The aim of this study was to analyze and compare the perioperative outcome and prognosis of patients undergoing trisectionectomy with hepatic resection of a lesser extent. METHODS: From 2000 to 2014, 48 patients underwent hepatic trisectionectomy for HCC with background cirrhosis or chronic hepatitis (Group A)...
September 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28801789/multimodal-laser-ablation-desorption-imaging-analysis-of-zn-and-mmp-11-in-breast-tissues
#16
Raquel González de Vega, María Luisa Fernández Sanchez, Noemí Eiro, Francisco J Vizoso, Michael Sperling, Uwe Karst, Alfredo Sanz Medel
Matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases. The main functions of these metalloproteinases are the degradation of the stromal connective tissue and basement membrane components. Recent data from model systems suggest that MMPs are involved in breast cancer (BC) initiation, invasion, and metastasis. Particularly, MMP-11 (stromelysin-3) is expressed in stromal fibroblasts adjacent to epithelial tumor cells, and high levels of this metalloproteinase were associated with tumor progression and poor prognosis of BC...
August 12, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28800447/two-phase-displacements-in-microchannels-of-triangular-cross-section
#17
Yafei Liu, Andrew Hansen, Erica Block, Norman R Morrow, Jeff Squier, John Oakey
Varying microfluidic channel cross-sectional geometry can dramatically alter fluid flow behavior, particularly for capillary-driven flow. Most fabrication techniques, however, are planar and therefore incapable of providing depth-dependent variations in width. We introduce an ultrafast laser ablation technique that enables the fabrication of microchannels with arbitrary triangular cross sectional geometry. Triangular channels were fabricated with widths ranging from 45 to 116µm and aspect ratios between 0...
August 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28797220/a-review-of-ultrasound-tissue-characterization-with-mean-scatterer-spacing
#18
Zhuhuang Zhou, Weiwei Wu, Shuicai Wu, Kebin Jia, Po-Hsiang Tsui
Tissues exhibiting quasi-periodic structures can be modeled as a collection of diffuse scatterers and coherent scatterers. The mean scatterer spacing (MSS) of coherent and quasi-periodic components is directly related to tissue microstructure and has become an important quantitative ultrasound (QUS) parameter in the characterization of quasi-periodic tissues. In this paper, a review of the literature on the development of MSS as a QUS parameter was conducted. First, a unified theoretical background of MSS estimates was provided...
September 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28797186/ethanol-and-thermal-ablation-for-malignant-thyroid-tumours
#19
So Yeong Jeong, Jung Hwan Baek, Young Jun Choi, Jeong Hyun Lee
Papillary thyroid carcinoma (PTC) is the most common subtype of thyroid malignancy and has a good prognosis and low mortality rate. Surgery is the standard treatment for patients with primary and recurrent thyroid cancer. Although patients with PTC usually exhibit excellent treatment outcome, the incidence of recurrence in the neck ranges from 20% to 59%. When a patient with thyroid cancer is contraindicated for surgery, ultrasound (US)-guided ablation techniques, including ethanol ablation (EA) and thermal ablations, are suggested alternatives...
August 11, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28792860/combination-treatment-with-photodynamic-therapy-and-laser-ablation-in-breast-cancer-an-animal-model-study
#20
Jeeyeon Lee, Ho Yong Park, Wan Wook Kim, Ji Yun Jeong, Yong-Deok Lee, Mi-Hwa Choi, Sehoon Kim, Ji-Young Park, Jin Hyang Jung
PURPOSE: Minimally invasive treatments for early breast cancer have been reported. The objective of this study was to evaluate and compare two such treatments, laser ablation and photodynamic therapy (PDT), regarding their therapeutic efficacy for breast cancer. METHODS: Breast tumors were induced in 12 mice models. The treatment options were classified into four groups: control group (without any treatment, A), group treated only with laser ablation (B), group treated only with PDT (C), and group treated with the combination of laser ablation followed by PDT (D)...
August 8, 2017: Photomedicine and Laser Surgery
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