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A quick and reproducible surface-enhanced Raman scattering (SERS)-based immunoassay technique, using hollow gold nanospheres (HGNs) and magnetic beads, has been developed. Here, HGNs show strong enhancement effects from individual particles because hot spots can be localized on the pinholes in the hollow particle structure. Thus, HGNs can be used for highly(More)
The human skin equivalent model (HSEM) is well known as an attractive alternative model for evaluation of dermal toxicity. However, only limited data are available on the usefulness of a HSEM for nanotoxicity testing. This study was designed to investigate cutaneous toxicity of polystyrene and TiO2 nanoparticles using cultured keratinocytes, a HSEM, and an(More)
Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) are the two most common subtypes of non-melanoma skin cancer (NMSC). Ultraviolet B radiation (UVB) exposure has been correlated with the occurrence of NMSC in humans. Thus far, studies investigating UVB-associated risk factors for NMSC in Asia have not been completed. The goal of this study was to(More)
Quantum dots (QDs) are rapidly emerging as an important class of nanoparticles (NPs) with potential applications in medicine. However, little is known about penetration of QDs through human skin. This study investigated skin penetration of QDs in both in vivo and in vitro human skin. Using the tape stripping method, this study demonstrates for the first(More)
Atopic dermatitis (AD) is a chronic inflammatory skin disease in which T-helper type 2 (Th2)-type immune responses are dominant. Th2 cytokine, interleukin (IL)-33 and thymic stromal lymphopoietin (TSLP) have been suggested to have an important role in AD. IL-33 is highly expressed in AD, but its role in AD has not yet been fully understood. To further(More)
BACKGROUND/AIMS Fluorescent quantum dots (QDs) are powerful multipurpose interfaces of nanotechnology providing long-term and multicolor imaging of cellular and molecular interactions. The application of QDs in living organisms is just beginning to be explored, and zebrafish embryos may be suitable vertebrate model organisms for intravital imaging with QDs.(More)
BACKGROUND/PURPOSE The skin plays an important role as a protective barrier against toxic environments and also is a route of drug administration. In spite of evidence for and interest in the skin penetration of nanoparticles, no study has examined the effect of nanoparticle surface charge on percutaneous absorption. In this study, we investigated the(More)
Tamoxifen (TAM) is a synthetic non-steroidal anti-estrogen compound that is widely used as an effective chemotherapeutic agent for treatment and prevention of breast cancer. Unfortunately, prolonged treatment with TAM causes TAM-responsive tumors to become TAM resistant through an as-yet-unknown mechanism. To develop novel anti-breast cancer agents that are(More)
This study was undertaken to investigate the potential toxicity and establish the no observed adverse effect level (NOAEL) and target organ(s) of negatively charged colloidal silica particles of different sizes, ie, SiO2 (EN20(-)) (20 nm) or SiO2 (EN100(-)) 2(100 nm), administered by gavage in Sprague-Dawley rats. After verification of the physicochemical(More)