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https://www.readbyqxmd.com/read/27906510/thermohydrogel-containing-melanin-for-photothermal-cancer-therapy
#1
Miri Kim, Hyun Soo Kim, Min Ah Kim, Hyanghwa Ryu, Hwan-Jeong Jeong, Chang-Moon Lee
Melanin is an effective absorber of light and can extend to near infrared (NIR) regions. In this study, a natural melanin is presented as a photothermal therapeutic agent (PTA) because it provides a good photothermal conversion efficiency, shows biodegradability, and does not induce long-term toxicity during retention in vivo. Poloxamer solution containing melanin (Pol-Mel) does not show any precipitation and shows sol-gel transition at body temperature. After irradiation from 808 nm NIR laser at 1.5 W cm(-2) for 3 min, the photothermal conversion efficiency of Pol-Mel is enough to kill cancer cells in vitro and in vivo...
December 1, 2016: Macromolecular Bioscience
https://www.readbyqxmd.com/read/27906396/gadolinium-oxysulfide-coated-gold-nanorods-with-improved-stability-and-dual-modal-magnetic-resonance-photoacoustic-imaging-contrast-enhancement-for-cancer-theranostics
#2
Tao Guo, Yan Lin, Zhi Li, Shan Chen, Guoming Huang, Huirong Lin, Jun Wang, Gang Liu, Huang-Hao Yang
Gold nanorods (GNRs) are emerging as a promising nanoplatform for cancer theranostics because of their unique optical properties. However, they still suffer from many limitations, such as high cytotoxicity, low thermodynamic and biological stability, and a tedious process for integrating other imaging modalities, for further practical biomedical applications. In this work, a strategy by one-step coating of Gd2O2S around GNRs is reported to address these limitations of GNRs. After the coating of the Gd2O2S shell, the as-fabricated Gd2O2S coated GNRs (GNRs@Gd2O2S) show enhanced biocompatibility and photostability, and tunable localized surface plasmon resonance...
December 1, 2016: Nanoscale
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
#3
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/27899044/folic-acid-modified-and-functionalized-cus-nanocrystal-based-nanoparticles-for-combined-tumor-chemo-and-photothermal-therapy
#4
Zhu Xiali, Yingjie Zhang, Heqing Huang, Huijuan Zhang, Lin Hou, Zhenzhong Zhang
Recent studies have identified that CuS nanocrystal (CuS NCs) could be used as a new class of promising photo-thermal agents due to their excellent plasmonic absorption abilities in a wide near-infrared (NIR) region. However, most of nanocarriers lack target capacity for combining chemotherapy and photothermal therapy effects. Herein, we reported chitosan (CS)-encapsulated and folic acid (FA)-modified nanoparticles (NPs) simultaneously loading with functionalized CuS NCs and docetaxel (DTX) (FA-DTX-PVP/CuS-NPs)...
November 30, 2016: Journal of Drug Targeting
https://www.readbyqxmd.com/read/27897297/facile-one-pot-synthesis-of-fe3o4-chitosan-nanospheres-for-mri-and-fluorescence-imaging-guided-chemo-photothermal-combinational-cancer-therapy
#5
Zhifang Gao, Xijian Liu, Yeying Wang, Guoying Deng, Feng Zhou, Qian Wang, Lijuan Zhang, Jie Lu
Multifunctional nanoplatforms that integrate imaging and chemo-photothermal therapy for highly efficient cancer diagnostics and therapeutics have gained great interest in recent years. Herein, we designed and synthesized biodegradable and biocompatible magnetic chitosan nanospheres (Fe3O4@CS) by a facile one-pot synthesis method. Doxorubicin (DOX, an anticancer drug) and indocyanine green (ICG) can be co-loaded into the Fe3O4@CS nanospheres (Fe3O4@CS-ICG/DOX nanocomposites) by virtue of the mesoporous structure and electrostatic interactions of CS...
November 29, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
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
#6
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/27879041/cyanine-anchored-silica-nanochannels-for-light-driven-synergistic-thermo-chemotherapy
#7
Yibin Deng, Li Huang, Hong Yang, Hengte Ke, Hui He, Zhengqing Guo, Tao Yang, Aijun Zhu, Hong Wu, Huabing Chen
Smart nanoparticles are increasingly important in a variety of applications such as cancer therapy. However, it is still a major challenge to develop light-responsive nanoparticles that can maximize the potency of synergistic thermo-chemotherapy under light irradiation. Here, spatially confined cyanine-anchored silica nanochannels loaded with chemotherapeutic doxorubicin (CS-DOX-NCs) for light-driven synergistic cancer therapy are introduced. CS-DOX-NCs possess a J-type aggregation conformation of cyanine dye within the nanochannels and encapsulate doxorubicin through the π-π interaction with cyanine dye...
November 23, 2016: Small
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
#8
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
#9
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
#10
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/27877236/core-shell-nanostars-for-multimodal-therapy-and-imaging
#11
Mengyuan Li, Lele Li, Changyou Zhan, Daniel S Kohane
The coupling of diagnostic capability and effective therapy in a single multifunctional nanomedicine is desirable but remains challenging. Here, we developed multifunctional nanoparticles consisting of a gold nanostar (AuNS) core with a shell of metal-drug coordination polymer (CP). The AuNS core enabled plasmonic photothermal effect and two-photon photoluminescence (TPL), while the CP shell of gadolinium and gemcitabine monophosphate allowed chemotherapy and MRI imaging. The AuNS@CP nanoparticles exhibited a strong T1 contrast signal and could monitor the localization of nanoparticles in vivo through noninvasive MR imaging, while intravital TPL imaging could be used to study nanoparticle behavior in tumors at the microscopic level...
2016: Theranostics
https://www.readbyqxmd.com/read/27875978/near-infrared-light-responsive-polymeric-nanocomposites-for-cancer-therapy
#12
Cong Min, Xueqing Zou, Quanzhu Yang, Liqiong Liao, Guofu Zhou, Lijian Liu
Inorganic nanoparticles, which can absorb and convert near infrared (NIR) light to heat to ablate cancer cells, have been widely investigated in photothermal therapy. However, the inherent poor solubility and acute systemic toxicity of these inorganic particles hinder their application in clinical practice. Polymeric nnanocomposites materials containing both inorganic nanoparticles and polymers could be harnessed to achieve enhanced photothermal therapeutic effect as well as improved biocompatibility and multi-responsiveness...
November 22, 2016: Current Topics in Medicinal Chemistry
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/27874854/graphene-materials-as-2d-non-viral-gene-transfer-vector-platforms
#14
REVIEW
M Vincent, I de Lázaro, K Kostarelos
Advances in genomics and gene therapy could offer solutions to many diseases that remain incurable today, however one of the critical reasons halting clinical progress is due to the difficulty in designing efficient and safe delivery vectors for the appropriate genetic cargo. Safety and large-scale production concerns counter-balance the high gene transfer efficiency achieved with viral vectors, while non-viral strategies have yet to become sufficiently efficient. The extraordinary physicochemical, optical and photothermal properties of graphene-based materials (GBMs) could offer two-dimensional (2D) components for the design of nucleic acid carrier systems...
November 22, 2016: Gene Therapy
https://www.readbyqxmd.com/read/27873448/multibuilding-block-janus-synthesized-by-seed-mediated-self-assembly-for-enhanced-photothermal-effects-and-colored-brownian-motion-in-an-optical-trap
#15
Kanokwan Sansanaphongpricha, Michael C DeSantis, Hongwei Chen, Wei Cheng, Kai Sun, Bo Wen, Duxin Sun
The asymmetrical features and unique properties of multibuilding block Janus nanostructures (JNSs) provide superior functions for biomedical applications. However, their production process is very challenging. This problem has hampered the progress of JNS research and the exploration of their applications. In this study, an asymmetrical multibuilding block gold/iron oxide JNS has been generated to enhance photothermal effects and display colored Brownian motion in an optical trap. JNS is formed by seed-mediated self-assembly of nanoparticle-loaded thermocleavable micelles, where the hydrophobic backbones of the polymer are disrupted at high temperatures, resulting in secondary self-assembly and structural rearrangement...
November 22, 2016: Small
https://www.readbyqxmd.com/read/27868243/simulation-of-laser-tattoo-pigment-interaction-in-a-tissue-mimicking-phantom-using-q-switched-and-long-pulsed-lasers
#16
K J Ahn, B J Kim, S B Cho
BACKGROUND: Laser therapy is the treatment of choice in tattoo removal. However, the precise mechanisms of laser-tattoo pigment interactions remain to be evaluated. METHODS: We evaluated the geometric patterns of laser-tattoo pigment particle interactions using a tattoo pigment-embedded tissue-mimicking (TM) phantom. RESULTS: A Q-switched (QS) neodymium-doped yttrium aluminum garnet laser was used at settings of 532-, 660-, and 1064-nm wavelengths, single-pulse and quick pulse-to-pulse treatment modes, and spot sizes of 4 and 7 mm...
November 20, 2016: Skin Research and Technology
https://www.readbyqxmd.com/read/27868019/playing-with-nanoparticle-shapes-and-laser-powers-to-decide-which-route-to-take-during-photothermal-therapy-apoptosis-or-necrosis
#17
COMMENT
Claudia Tortiglione, Roberta Iachetta
No abstract text is available yet for this article.
October 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27866630/intracellular-synthesis-of-gold-nanoparticles-with-antioxidant-activity-by-probiotic-lactobacillus-kimchicus-dcy51-t-isolated-from-korean-kimchi
#18
Josua Markus, Ramya Mathiyalagan, Yeon-Ju Kim, Ragavendran Abbai, Priyanka Singh, Sungeun Ahn, Zuly Elizabeth Jimenez Perez, Joon Hurh, Deok Chun Yang
A straightforward synthesis of gold nanoparticles (AuNps) is achieved by novel probiotic Lactobacillus kimchicus DCY51(T) isolated from Korean kimchi via an intracellular membrane-bound mechanism. The bioreduction of HAuCl4 into AuNps was verified by ultraviolet-visible spectrophotometry at ∼540nm. AuNps were spherical with varying sizes of 5-30nm. AuNps maintained an average crystallite size of 13nm and demonstrated long-term stability in physiological buffer and biological media. Furthermore, the protective capping layer consisted of amino acid residues and surface-bound proteins rendered them non-toxic to murine macrophage (RAW264...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27866620/extracellular-biosynthesis-of-copper-sulfide-nanoparticles-by-shewanella-oneidensis-mr-1-as-a-photothermal-agent
#19
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
#20
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
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