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Mosaiab, Tamim,Shin, Chun-im,Choi, Pyeong Ho,Shin, Gyo-jic,Lee, Sangkug,Choi, Kyung Ho,Yoo, Eui Sang,Lee, Jihoon,In, Insik,Park, Sung Young The Royal Society of Chemistry 2013 New journal of chemistry Vol.37 No.12
<P>Zwitterionic fluorescent nanoparticles are developed by using polysulfobetaine methacrylate, NIPAAm and BODIPY fluorophores to identify the cancer cells in response to intra and extracellular stimuli. The fluorescent nanoparticles exhibit minimal fluorescence intensity at physiological temperature and pH, while strong emissions are observed in acidic and basic environments enabling the nanoparticles to act as novel fluorescence probes.</P> <P>Graphic Abstract</P><P>The prepared zwitterionic fluorescence nanoparticles showed strong green fluorescence in acidic and basic environments where no fluorescence was observed at normal cellular pH. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3nj00941f'> </P>
M. Tamim Hossain,Bibin Prasad,박기선,이희준,하유호,이승구,김중경 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.2
Hyperthermia with a radiofrequency electric field can treat a cancer by delivering energy to heat and kill cancer cells. For a deeply located tumor, focused energy to raise its local temperature selectively is crucial for effective cancer treatment with minimal injury to normal tissues. We evaluated the selective heating characteristics of hyperthermia with 13.56 MHz radiofrequency energy in phantom models by experimental and computational approaches. Phantom materials with different electrical properties such as distilled water, normal saline, egg white and porcine meat were used. Temperature rise in depthwise during heating at 75 W output power was compared. The temperature of the egg white increased selectively in the distilled water but not significantly in the saline. Numerical simulation was performed using SEMCAD X software to calculate the distributions of specific absorption rate (SAR) and temperature, which enabled us to elucidate the selective heating mechanism in those phantom models.
Ki Sun Park,M. Tamim Hossain,김중경,이희준 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.11
Radiofrequency hyperthermia is a treatment that involves heating cancer tissue by supplying a 10 to 100 MHz radiofrequency current through an electrode, aiming to induce thermal necrosis of cancer cells. However, this process also heats normal cells, making it crucial to monitor the temperature inside the patient's body to prevent thermal necrosis of healthy tissues. Accurate noninvasive measurement of the internal body temperature is of utmost importance in radiofrequency hyperthermia. To achieve this, a numerical study was conducted to predict a patient's body temperature by solving the Laplace and Pennes’ bioheat transfer equations for the specific area where the cancer is located. An in-house numerical program was developed and applied to radiofrequency hyperthermia to find the optimal electrode location, enhancing the necrosis rate of cancer cells while avoiding thermal damage to normal tissues.
Horcajada, Patricia,Chalati, Tamim,Serre, Christian,Gillet, Brigitte,Sebrie, Catherine,Baati, Tarek,Eubank, Jarrod F.,Heurtaux, Daniela,Clayette, Pascal,Kreuz, Christine,Chang, Jong-San,Hwang, Young K Nature Publishing Group 2010 NATURE MATERIALS Vol.9 No.2
In the domain of health, one important challenge is the efficient delivery of drugs in the body using non-toxic nanocarriers. Most of the existing carrier materials show poor drug loading (usually less than 5 wt% of the transported drug versus the carrier material) and/or rapid release of the proportion of the drug that is simply adsorbed (or anchored) at the external surface of the nanocarrier. In this context, porous hybrid solids, with the ability to tune their structures and porosities for better drug interactions and high loadings, are well suited to serve as nanocarriers for delivery and imaging applications. Here we show that specific non-toxic porous iron(III)-based metal–organic frameworks with engineered cores and surfaces, as well as imaging properties, function as superior nanocarriers for efficient controlled delivery of challenging antitumoural and retroviral drugs (that is, busulfan, azidothymidine triphosphate, doxorubicin or cidofovir) against cancer and AIDS. In addition to their high loadings, they also potentially associate therapeutics and diagnostics, thus opening the way for theranostics, or personalized patient treatments.