Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport

Abstract The discharge of engineered nanomaterials (ENMs) into environment is raising widespread concern not only due to their direction bio-toxicity but also their bio-concentration and bio-magnification through food web. However, the transformation and distribution of ENMs during food-chain transp...

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Autores principales:	Li-Jiao Tian, Yong Peng, Dong-Liang Chen, Jing-Yuan Ma, Han-Qing Yu, Wen-Wei Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/29105b31313a4095bd66ccb207bae516
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spelling	oai:doaj.org-article:29105b31313a4095bd66ccb207bae5162021-12-02T12:32:18ZSpectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport10.1038/s41598-017-04694-62045-2322https://doaj.org/article/29105b31313a4095bd66ccb207bae5162017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04694-6https://doaj.org/toc/2045-2322Abstract The discharge of engineered nanomaterials (ENMs) into environment is raising widespread concern not only due to their direction bio-toxicity but also their bio-concentration and bio-magnification through food web. However, the transformation and distribution of ENMs during food-chain transport are poorly understood, due to lack of accurate, reliable analytical methods. In this study, by using a suite of advanced spectrum techniques, we successfully tracked the distribution and biotransformation dynamics of CdSe quantum dots (QDs) during their transport from Shewanella onedensis to Caenorchabditis elegans in predation. Fluorescence microscopy and Raman mapping showed that the ingested QDs by C. elegans were located at the gut lumen and subcutaneous tissue, and were partially excreted from the nematode body over time. Micro-X-ray fluorescence (μ-XRF) spectroscopy and Se K-edge X-ray absorption fine structure (XAFS) results further revealed the changed distribution of Se element over time, and a shift in the major Se species from CdSe to Se0 and Na2SeO3 IV. This work demonstrates the utility of advanced spectral techniques for characterizing QDs in vivo, and may facilitate a better understanding on the environmental transformation and fates of ENMs.Li-Jiao TianYong PengDong-Liang ChenJing-Yuan MaHan-Qing YuWen-Wei LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Li-Jiao Tian Yong Peng Dong-Liang Chen Jing-Yuan Ma Han-Qing Yu Wen-Wei Li Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
description	Abstract The discharge of engineered nanomaterials (ENMs) into environment is raising widespread concern not only due to their direction bio-toxicity but also their bio-concentration and bio-magnification through food web. However, the transformation and distribution of ENMs during food-chain transport are poorly understood, due to lack of accurate, reliable analytical methods. In this study, by using a suite of advanced spectrum techniques, we successfully tracked the distribution and biotransformation dynamics of CdSe quantum dots (QDs) during their transport from Shewanella onedensis to Caenorchabditis elegans in predation. Fluorescence microscopy and Raman mapping showed that the ingested QDs by C. elegans were located at the gut lumen and subcutaneous tissue, and were partially excreted from the nematode body over time. Micro-X-ray fluorescence (μ-XRF) spectroscopy and Se K-edge X-ray absorption fine structure (XAFS) results further revealed the changed distribution of Se element over time, and a shift in the major Se species from CdSe to Se0 and Na2SeO3 IV. This work demonstrates the utility of advanced spectral techniques for characterizing QDs in vivo, and may facilitate a better understanding on the environmental transformation and fates of ENMs.
format	article
author	Li-Jiao Tian Yong Peng Dong-Liang Chen Jing-Yuan Ma Han-Qing Yu Wen-Wei Li
author_facet	Li-Jiao Tian Yong Peng Dong-Liang Chen Jing-Yuan Ma Han-Qing Yu Wen-Wei Li
author_sort	Li-Jiao Tian
title	Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
title_short	Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
title_full	Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
title_fullStr	Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
title_full_unstemmed	Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
title_sort	spectral insights into the transformation and distribution of cdse quantum dots in microorganisms during food-chain transport
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/29105b31313a4095bd66ccb207bae516
work_keys_str_mv	AT lijiaotian spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport AT yongpeng spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport AT dongliangchen spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport AT jingyuanma spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport AT hanqingyu spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport AT wenweili spectralinsightsintothetransformationanddistributionofcdsequantumdotsinmicroorganismsduringfoodchaintransport
_version_	1718394085520179200

Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport

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