記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Chemical Society of Japan  

DOI： 10.1246/bcsj.20210200

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acs.molpharmaceut.1c00188

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1002/cnma.202000271

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/cnma.202000271

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.carbon.2020.02.089

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

Upon contact with biofluids, proteins are quickly adsorbed onto the nanoparticle (NP) surface to form a protein corona, which initiates the opsonization and facilitates the rapid clearance of the NP by macrophage uptake. Although polyethylene glycol (PEG) functionalization has been the standard approach to evade macrophage uptake by reducing protein adsorption, it cannot fully eliminate nonspecific uptake. Herein, polyglycerol (PG) grafting is demonstrated as a better alternative to PEG. NPs of various size and material were grafted with PG and PEG at 30, 20, and 10 wt % contents by controlling the reaction conditions, and the resulting NP-PG and NP-PEG were characterized qualitatively by IR spectroscopy and quantitatively by thermogravimetric analysis. Their resistivity to adsorption of the proteins in fetal bovine serum and human plasma were compared by polyacrylamide gel electrophoresis, bicinchoninic acid assay, and liquid chromatography-tandem mass spectrometry, giving a consistent conclusion that PG shields protein adsorption more efficiently than does PEG. The macrophage uptake was assayed by transmission electron microscopy and by extinction spectroscopy or inductively coupled plasma mass spectrometry, revealing that PG avoids macrophage uptake more efficiently than does PEG. In particular, a NP coated with PG at 30 wt % (NP-PG-h) prevents corona formation almost completely, regardless of NP size and core material, leading to the complete evasion of macrophage uptake. Our findings demonstrate that PG grafting is a promising strategy in nanomedicine to improve anti-biofouling property and stealth efficiency in nanoformulations.

DOI： 10.1021/acsnano.0c02289

PubMed

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

Preferential accumulation of nanoparticles in a tumor is realized commonly by combined effects of active and passive targeting. However, passive targeting based on an enhanced permeation and retention (EPR) effect is not sufficient to observe clear tumor fluorescence images in most of the in vivo experiments using tumor-bearing mice. Herein, polyglycerol-functionalized nanodiamonds (ND-PG) conjugated with cyanine dye (Cy7) are synthesized and it is found that the resulting ND-PG-Cy7 is preferentially accumulated in the tumor, giving clear fluorescence in in vivo and ex vivo fluorescence images. One of the plausible reasons is the longer in vivo blood circulation time of ND-PG-Cy7 (half-life: 58 h determined by the pharmacokinetic analysis) than that of other nanoparticles (half-life: <20 h in most of the previous reports). In a typical example, the fluorescence intensity of tumors increases due to continuous tumor accumulation of ND-PG-Cy7, even more than one week postinjection. This may be owing to the stealth effect of PG that was reported previously, avoiding recognition and excretion by reticuloendothelial cells, which are abundant in liver and spleen. In fact, the fluorescence intensities from the liver and spleen is similar to those from other organs, while the tumor exhibits much stronger fluorescence in the ex vivo image.

DOI： 10.1002/smll.201901930

Scopus

PubMed

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/smll.201901930

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：IOP Publishing  

Cancer phototherapy (PT) including photodynamic therapy (PDT) and photothermal therapy (PTT) has attracted extensive interest due to its non-invasive and region-specific nature. In order to enhance the efficacy, we have fabricated various nanocomposites consisting of a photosensitizer (chlorin e 6 (Ce6), pheophorbide a (Pa) or bacteriopheophorbide a (bPa)) for PDT and a two-dimensional nanosheet (graphene or MoS2) for PTT by a one-pot protocol through liquid phase exfoliation. In addition, an anticancer drug (doxorubicin (DOX) or irinotecan (Ir)) was loaded on the nanosheet in the same way for comparison. The nanocomposites demonstrated stability when dispersed in water except for MoS2-Ir. We observed that MoS2-Ce6 killed cancer cells over ten times more effectively than other Ce6-loaded nanocomposites.

DOI： 10.1088/2053-1583/ab377b

Scopus

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その他リンク： https://iopscience.iop.org/article/10.1088/2053-1583/ab377b/pdf

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.toxlet.2018.11.002

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s11356-018-3111-y

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その他リンク： http://link.springer.com/content/pdf/10.1007/s11356-018-3111-y.pdf

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Oxford University Press (OUP)  

DOI： 10.1093/nar/gky707

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

DOI： 10.1007/s11356-017-9626-9

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その他リンク： http://link.springer.com/content/pdf/10.1007/s11356-017-9626-9.pdf

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.envpol.2016.03.022

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/smll.200902049

CiNii Article

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