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https://www.readbyqxmd.com/read/27924157/biodegradable-nitrogen-doped-carbon-nanodots-for-non-invasive-photoacoustic-imaging-and-photothermal-therapy
#1
Changho Lee, Woosung Kwon, Songeun Beack, Donghyun Lee, Yoonsang Park, Hyemin Kim, Sei Kwang Hahn, Shi-Woo Rhee, Chulhong Kim
Multifunctional nanoparticles have been widely investigated for biomedical applications, such as imaging, therapy, and drug delivery. Especially, photoactive nanoparticles have received great attention as theranostic agents because of their heat-generating abilities after exposure to laser irradiation. However, photostability and safety issues have been the technical hurdles for further clinical applications. Here, we designed nitrogen (N)-doped carbon nanodots (N-CNDs) that have strong absorption in the near-infrared region, high photostability, and excellent biodegradability...
2016: Theranostics
https://www.readbyqxmd.com/read/27924155/versatile-ph-response-micelles-with-high-cell-penetrating-helical-diblock-copolymers-for-photoacoustic-imaging-guided-synergistic-chemo-photothermal-therapy
#2
Shengyu Shi, Yajing Liu, Yu Chen, Zhihuang Zhang, Yunsheng Ding, Zongquan Wu, Jun Yin, Liming Nie
With high optical absorption efficiency, near infrared (NIR) dyes have been proposed as theranostic agents for fluorescence imaging, photoacoustic imaging (PAI), and photothermal therapy (PTT). However, inherent hydrophobicity and short circulation time of small molecule hinder the further biomedical application. Herein smart amphiphilic copolymer was synthesized containing IR780/camptothecin@poly(ε-caprolactone) (IR780/CPT@PCL) as core, helical poly(phenyl isocyanide) (PPI) blocks as shell with the pH-responsive rhodamine B (RhB) moieties in the core-shell interface...
2016: Theranostics
https://www.readbyqxmd.com/read/27915133/novel-reconstruction-technique-for-an-isolated-plantar-calcaneonavicular-spring-ligament-tear-a-5-case-series-report
#3
Ezequiel Palmanovich, Shay Shabat, Yaron S Brin, Sabri Massrawe, Iftach Hestroni, Meir Nyska
BACKGROUND: It is usually accepted that acquired flatfoot deformity after injury is usually due to partial or complete tear of the posterior tibial tendon (PTT), with secondary failure of the other structures which maintain the medial longitudinal arch, such as the plantar calcaneo-navicular (SPRING) ligament. It is unusual to find an isolated Spring Ligament (SL) tear, with an intact TP tendon. METHODS: The medial arch reconstruction technique of an isolated SL tear in 5 patients is presented discussed in this paper...
November 18, 2016: Foot
https://www.readbyqxmd.com/read/27901317/dendrimer-stabilized-gold-nanostars-as-a-multifunctional-theranostic-nanoplatform-for-ct-imaging-photothermal-therapy-and-gene-silencing-of-tumors
#4
Ping Wei, Jingwen Chen, Yong Hu, Xin Li, Han Wang, Mingwu Shen, Xiangyang Shi
Development of versatile nanomaterials combining diagnostic and therapeutic functionalities within one single nanoplatform is extremely important for tumor theranostics. In this work, the authors report the synthesis of a gold nanostar (Au NS)-based theranostic platform stabilized with cyclic arginine-glycine-aspartic (Arg-Gly-Asp, RGD) peptide-modified amine-terminated generation 3 poly(amidoamine) dendrimers. The formed RGD-modified dendrimer-stabilized Au NSs (RGD-Au DSNSs) are used as a gene delivery vector to complex small interfering RNA (siRNA) for computed tomography (CT) imaging, thermal imaging, photothermal therapy (PTT), and gene therapy of tumors...
November 30, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27895997/thermal-therapy-with-magnetic-nanoparticles-for-cell-destruction
#5
Adi Vegerhof, Menachem Motei, Arkady Rudinzky, Dror Malka, Rachela Popovtzer, Zeev Zalevsky
In this article we suggest a new concept for cell destruction based upon manipulating magnetic nanoparticles (MNPs) by applying external, low frequency alternating magnetic field (AMF) that oscillates the particles, together with focused laser illumination. Assessment of temperature profiles in a head and neck squamous cell carcinoma sample showed that cells with MNPs, treated with AMF (3 Hz, 300 mW) and laser irradiation (30 mW), reached 42°C after 4.5 min, as opposed to cells treated with laser but without AMF...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27893574/randomized-comparison-of-packed-red-blood-cell-to-fresh-frozen-plasma-transfusion-ratio-of-4-1-vs-1-1-during-acute-massive-burn-excision
#6
Laura A Galganski, David G Greenhalgh, Soman Sen, Tina L Palmieri
This prospective randomized controlled trial compared 1:1 vs 4:1 packed red blood cell with fresh frozen plasma (PRBC/FFP) transfusion strategy on outcomes in children with >20% TBSA burns. Children with >20% TBSA burns were randomized to a 1:1 or 4:1 PRBC/FFP transfusion ratio during burn excision. Parameters measured included demographics, TBSA burn, and Pediatric Risk of Mortality scores. Laboratory values recorded preoperatively, 1 hour, 12 hours, 24 hours, and 1 week postoperatively included prothrombin time, partial thromboplastin time (PTT), international normalized ratio, fibrinogen, protein C, and antithrombin C (AIII)...
November 15, 2016: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/27890732/programmed-near-infrared-light-responsive-drug-delivery-system-for-combined-magnetic-tumor-targeting-magnetic-resonance-imaging-and-chemo-phototherapy
#7
Qianhua Feng, Yuanyuan Zhang, Wanxia Zhang, Yongwei Hao, Yongchao Wang, Hongling Zhang, Lin Hou, Zhenzhong Zhang
: In this study, an intelligent drug delivery system was developed by capping doxorubicin (DOX)-loaded hollow mesoporous CuS nanoparticles (HMCuS NPs) with superparamagnetic iron oxide nanoparticles (IONPs). Under near infrared (NIR) light irradiation, the versatile HMCuS NPs could exploit the merits of both photothermal therapy (PTT) and photodynamic therapy (PDT) simultaneously. Herein, the multifunctional IONPs as gatekeeper with the enhanced capping efficiency were supposed to realize "zero premature release" and minimize the adverse side effects during the drug delivery in vivo...
November 24, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27886420/posterior-tibial-tendinopathy-associated-with-matrix-metalloproteinase-13-promoter-genotype-and-haplotype
#8
REVIEW
Francielle Boçon de Araujo Munhoz, José Eduardo Baroneza, Alexandre Godoy-Santos, Túlio Diniz Fernandes, Filipe Polese Branco, Lupe Furtado Alle, Ricardo Lehtonen de Souza, Maria Cristina Leme Godoy Dos Santos
BACKGROUND: Posterior tibial tendon (PTT) is particularly vulnerable and its insufficiency is recognized as the main cause of adult acquired flat foot. Some patients have a predisposition without clinically recognized cause, suggesting that individual characteristics play an important role in tendinopathy. Objective was investigated whether genetic variants in matrix metalloproteinases (MMPs) are associated with PTT dysfunction. METHODS: 100 women who presented PTT dysfunction, with histopathological examination of the tendon and magnetic resonance image (MRI) confirming tendinopathy, while 100 asymptomatic women who present intact PPT at MRI constituted the control group were evaluated for MMP-13 g...
November 25, 2016: Journal of Gene Medicine
https://www.readbyqxmd.com/read/27885384/use-of-the-arthroereisis-screw-with-tendoscopic-delivered-platelet-rich-plasma-for-early-stage-adult-acquired-flatfoot-deformity
#9
Youichi Yasui, Ichiro Tonogai, Andrew J Rosenbaum, David M Moore, Masato Takao, Hirotaka Kawano, John G Kennedy
PURPOSE: Early stage adult acquired flatfoot deformity (AAFD) is traditionally treated with osteotomy and tendon transfer. Despite a high success rate, the long recovery time and associated morbidity are not sufficient. This study aims to evaluate the functional and radiological outcomes following the use of the arthroereisis screw with tendoscopic delivered PRP for early stage AAFD. METHODS: Patients with stage IIa AAFD who underwent the use of the arthroereisis screw with tendoscopic delivered PRP with a minimum follow-up time of 24 months were retrospectively evaluated...
November 24, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27877887/in-vitro-biomechanical-properties-fluorescence-imaging-surface-enhanced-raman-spectroscopy-and-photothermal-therapy-evaluation-of-luminescent-functionalized-camoo4-eu-au-hybrid-nanorods-on-human-lung-adenocarcinoma-epithelial-cells
#10
Qifei Li, Abdul K Parchur, Anhong Zhou
Highly dispersible Eu(3+)-doped CaMoO4@Au-nanorod hybrid nanoparticles (HNPs) exhibit optical properties, such as plasmon resonances in the near-infrared region at 790 nm and luminescence at 615 nm, offering multimodal capabilities: fluorescence imaging, surface-enhanced Raman spectroscopy (SERS) detection and photothermal therapy (PTT). HNPs were conjugated with a Raman reporter (4-mercaptobenzoic acid), showing a desired SERS signal (enhancement factor 5.0 × 10(5)). The HNPs have a heat conversion efficiency of 25...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27877241/photo-decomposable-organic-nanoparticles-for-combined-tumor-optical-imaging-and-multiple-phototherapies
#11
Wenjun Miao, Hyungjun Kim, Vipul Gujrati, Jin Yong Kim, Hyeongsu Jon, Yonghyun Lee, Minsuk Choi, Jinjoo Kim, Soyoung Lee, Dong Yun Lee, Sukmo Kang, Sangyong Jon
Combination of photodynamic therapy (PDT) with photothermal therapy (PTT) has achieved significantly improved therapeutic efficacy compared to a single phototherapy modality. However, most nanomaterials used for combined PDT/PTT are made of non-biodegradable materials (e.g., gold nanorods, carbon nanotubes, and graphenes) and may remain intact in the body for long time, raising concerns over their potential long-term toxicity. Here we report a new combined PDT/PTT nanomedicine, designated SP(3)NPs, that exhibit photo-decomposable, photodynamic and photothermal properties...
2016: Theranostics
https://www.readbyqxmd.com/read/27877239/nir-laser-controlled-drug-release-from-dox-ir-780-loaded-temperature-sensitive-liposomes-for-chemo-photothermal-synergistic-tumor-therapy
#12
Fei Yan, Wanlu Duan, Yekuo Li, Hao Wu, Yuli Zhou, Min Pan, Hongmei Liu, Xin Liu, Hairong Zheng
NIR laser-induced photothermal therapy (PTT) through near-infrared agents has demonstrated the great potential in solid tumor ablation. However, the nonuniform heat distribution over tumors from PTT makes it insufficient to kill all tumor cells, resulting in tumor recurrence and inferior outcomes. To improve the tumor treatment efficacy, it is highly desirable to develop the combinational treatment of PTT with other modalities, especially with chemotherapeutic agents. Here we report a smart DOX/IR-780-loaded temperature-sensitive-liposome (DITSL) which can achieve NIR-laser-controlled drug release for chemo-photothermal synergistic tumor therapy...
2016: Theranostics
https://www.readbyqxmd.com/read/27875977/theranostics-based-on-iron-oxide-and-gold-nanoparticles-for-imaging-guided-photothermal-and-photodynamic-therapy-of-cancer
#13
S Rajkumar, M Prabaharan
With the progress of nanotechnology, the treatment of cancer by photothermal therapy (PTT) and photodynamic therapy (PDT) using theranostic nanomaterials based on iron oxide (Fe3O4) and gold (Au) nanoparticles (NPs) has received much attention in recent years. The Fe3O4 NPs have been used as imaging-guided PTT of cancer due to their high relaxivity, excellent contrast enhancement, and less toxicity. The Au NPs have been widely employed as a contrast agent for CT imaging of different biological systems due to their enhanced X-ray attenuation property...
November 22, 2016: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/27867733/multi-wavelength-photoplethysmography-method-for-skin-arterial-pulse-extraction
#14
Jing Liu, Bryan Ping-Yen Yan, Wen-Xuan Dai, Xiao-Rong Ding, Yuan-Ting Zhang, Ni Zhao
In this work, we present a multi-wavelength (MW) PPG method exploiting the wavelength dependence of light penetration in skin tissue to provide depth resolution of skin blood pulsation. The MW PPG system requires two to three light sources in different wavelengths and extracts the arterial blood pulsation through a multi-wavelength multi-layer light-skin interaction model, which removes the capillary pulsation (determined from the short-wavelength PPG signal) from the long-wavelength PPG signal using absorption weighting factors that are quasi-analytically calibrated...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27866620/extracellular-biosynthesis-of-copper-sulfide-nanoparticles-by-shewanella-oneidensis-mr-1-as-a-photothermal-agent
#15
Nan-Qing Zhou, Li-Jiao Tian, Yu-Cai Wang, Dao-Bo Li, Pan-Pan Li, Xing Zhang, Han-Qing Yu
Photothermal therapy (PTT) is a minimally invasive and effective cancer treatment method and has a great potential for innovating the conventional chemotherapy approaches. Copper sulfide (CuS) exhibits photostability, low cost, and high absorption in near infrared region, and is recognized as an ideal candidate for PTT. However, CuS, as a photothermal agent, is usually synthesized with traditional chemical approaches, which require high temperature, additional stabilization and hydrophilic modification. Herein, we report, for the first time, the preparation of CuS nanoparticles as a photothermal agent by a dissimilatory metal reducing bacterium Shewanella...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27862953/dual-stimuli-responsive-nanotheranostics-for-multimodal-imaging-guided-trimodal-synergistic-therapy
#16
Shan Fang, Jing Lin, Chunxiao Li, Peng Huang, Wenxiu Hou, Chunlei Zhang, Jingjing Liu, Sisi Huang, Yongxiang Luo, Wenpei Fan, Daxiang Cui, Yunsheng Xu, Zhiming Li
Multimodal imaging guided synergistic therapy promises more accurate diagnosis than any single imaging modality, and higher therapeutic efficiency than any single one or their simple "mechanical" combination. Herein, we report a dual-stimuli responsive nanotheranostic based on a hierarchical nanoplatform, composed of mesoporous silica-coated gold nanorods (GNR@SiO2), Indocyanine Green (ICG), and 5-fluorouracil (5-FU), for in vivo multimodal imaging guided synergistic therapy. The 5-FU loaded ICG-conjugated silica-coated gold nanorods (GNR@SiO2-5-FU-ICG) was able to response specifically to the two stimuli of pH change and near-infrared (NIR) light irradiation...
November 15, 2016: Small
https://www.readbyqxmd.com/read/27862179/the-use-of-a-battery-of-pain-models-to-detect-analgesic-properties-of-compounds-a-two-part-four-way-crossover-study
#17
P Okkerse, G van Amerongen, M L de Kam, J Stevens, R P Butt, R Gurrell, A Dahan, J M van Gerven, J L Hay, G J Groeneveld
AIM: The aim was to investigate the ability of a battery of pain models to detect analgesic properties of commonly used analgesics in healthy subjects. METHODS: The battery consisted of tests eliciting electrical, mechanical and thermal (contact heat and cold pressor)-pain and included a UVB model, the thermal grill illusion and a paradigm of conditioned pain modulation. Subjects were administered fentanyl 3 µg/kg, phenytoin 300 mg, (S)-ketamine 10 mg and placebo (part I), or imipramine 100 mg, pregabalin 300 mg, ibuprofen 600 mg and placebo (part II)...
November 9, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27859944/user-independent-assessment-of-conditioning-pain-modulation-by-cuff-pressure-algometry
#18
T Graven-Nielsen, M Izumi, K K Petersen, L Arendt-Nielsen
BACKGROUND: The use of conditioning pain modulation (CPM) is hampered by poor reproducibility and lack of user-independent paradigms. This study refined the CPM paradigm by applying user-independent cuff algometry. METHODS: In 20 subjects, the CPM effect of conditioning with cuff stimulation on the arm was investigated by pain test stimuli on the contralateral leg before and in parallel with different cuff conditionings (10, 30, 60 kPa/60 s; 30, 60 kPa/10 s)...
November 11, 2016: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/27855337/osteotropic-peptide-mediated-bone-targeting-for-photothermal-treatment-of-bone-tumors
#19
Yitong Wang, Jian Yang, Hongmei Liu, Xinyu Wang, Zhengjie Zhou, Quan Huang, Dianwen Song, Xiaopan Cai, Lin Li, Kaili Lin, Jianru Xiao, Peifeng Liu, Qiang Zhang, Yiyun Cheng
The treatment of bone tumors is a challenging problem due to the inefficient delivery of therapeutics to bone and the bone microenvironment-associated tumor resistance to chemo- and radiotherapy. Here, we developed a bone-targeted nanoparticle, aspartate octapeptide-modified dendritic platinum-copper alloy nanoparticle (Asp-DPCN), for photothermal therapy (PTT) of bone tumors. Asp-DPCN showed much higher affinity toward hydroxyapatite and bone fragments than the non-targeted DPCN in vitro. Furthermore, Asp-DPCN accumulated more efficiently around bone tumors in vivo, and resulted in a higher temperature in bone tumors during PTT...
November 9, 2016: Biomaterials
https://www.readbyqxmd.com/read/27852137/motor-sequencing-in-older-adulthood-relationships-with-executive-functioning-and-effects-of-complexity
#20
Madison A Niermeyer, Yana Suchy, Rosemary E Ziemnik
OBJECTIVE: Older adults' motor sequencing performance is more reliant on executive functioning (EF) and more susceptible to complexity than that of younger adults. This study examined for which aspects of motor sequencing performance these relationships hold. METHODS: Fifty-seven younger and 90 non-demented, community-dwelling, older adults completed selected subtests from the Delis-Kaplan Executive Function System as indices of EF and component processes (CP; graphomotor speed; visual scanning; etc...
November 17, 2016: Clinical Neuropsychologist
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