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Biocompatible lipos...
Biocompatible liposome and chitosan-coated CdTe/CdSe/ZnSe multi-core-multi-shell fluorescent nanoprobe for biomedical applications
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- Abiodun Daramola, Olamide (author)
- Centre for Chemico- and Biomedicinal Research (CCBR), Department of Chemistry, Faculty of Science, Rhodes University, Grahamstown, South Africa; Department of Chemical and Physical Sciences, Faculty of Natural Science, Walter Sisulu University, Private Bag XI, Mthatha, South Africa
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- Bazibuhe Safari, Justin (author)
- Centre for Chemico- and Biomedicinal Research (CCBR), Department of Chemistry, Faculty of Science, Rhodes University, Grahamstown, South Africa; Department of Pharmacy, Faculty of Pharmaceutical Sciences and Public Health, Official University of Bukavu, Bukavu, Democratic Republic Congo
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- Adeniyi, Kayode Omotayo (author)
- Umeå universitet,Kemiska institutionen
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- Siwe-Noundou, Xavier (author)
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Gauteng, Pretoria, South Africa
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- Margaret Kirkpatrick Dingle, Laura (author)
- Biomedical Biotechnology Research Unit (BioBRU), Department of Biochemistry and Microbiology, Faculty of Science, Rhodes University, Grahamstown, South Africa
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- Lesley Edkins, Adrienne (author)
- Biomedical Biotechnology Research Unit (BioBRU), Department of Biochemistry and Microbiology, Faculty of Science, Rhodes University, Grahamstown, South Africa
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- Foster Tseki, Potlaki (author)
- Department of Chemical and Physical Sciences, Faculty of Natural Science, Walter Sisulu University, Private Bag XI, Mthatha, South Africa
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- Werner Maçedo Krause, Rui (author)
- Centre for Chemico- and Biomedicinal Research (CCBR), Department of Chemistry, Faculty of Science, Rhodes University, Grahamstown, South Africa
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(creator_code:org_t)
- Elsevier, 2024
- 2024
- English.
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In: Journal of Photochemistry and Photobiology A. - : Elsevier. - 1010-6030 .- 1873-2666. ; 454
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Abstract
Subject headings
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- Cadmium telluride (CdTe) semiconductor quantum dots (QDs) are brightly luminescent nanocrystals that have emerged as a new class of fluorescent probes for in vivo bioimaging and theranostic applications. CdTe QDs toxicity to normal human cells is minimized by coating with a less toxic ZnS and ZnSe shell forming a core–shell nanostructure. However, coating with ZnS or ZnSe shell is insufficient to prevent the leaching of toxic Cd metal ions. To further minimize toxicity, thiol dual capped CdTe/CdSe/ZnSe multi-core-multi-shell quantum dots were coated with nanoliposome or liposome vesicles (CdTe/CdSe/ZnSe@liposome) and chitosan nanoparticles (CdTe/CdSe/ZnSe@ChitNPs) and their biocompatibility on HeLa and Vero cells were investigated. Different spectroscopic and microscopic techniques were used to elucidate nanocomposites' optical, morphological, and physicochemical properties. The coating of CdTe/CdSe/ZnSe multi-core-multi-shell quantum dots were conducted at different formulations (F1, F2 and F3) and results from the fluorescence studies show that F3 demonstrated the best interaction for both liposome and ChitNPs composite. Exposure to 12 h UV illumination studies also reveals that CdTe/CdSe/ZnSe@liposome shows an enhancement in fluorescence compared to CdTe/CdSe/ZnSe@ChitNPs. The cytotoxicity of the formulations towards HeLa and Vero cells also depicted minimal toxicity compared to CdTe/CdSe/ZnSe QDs that shows much higher toxicity (IC50 = 0.09381 mg/ml). It was further observed that liposome coated multi-core-multi-shell QDs@F2 demonstrated lower toxicity (IC50 = 0.4364 mg/ml) compared to ChitNPs coated multi-core-multi-shell QDs@F2 (IC50 = 0.1618 mg/ml). Results from the florescence imaging studies reveal that CdTe/CdSe/ZnSe-multi-core-multi-shell QDs liposomes and ChitNPs composite retained most of their fluorescence and properties and could easily be tracked in cells and visualized around the nucleus. This indicates the successful internalization of the QDs in the cytosol. Therefore, these results shows that coating CdTe multi-core-mutli-shell QDs with liposomes and ChitNPs produce better biocompatibility compared to uncoated multi-core–shell QDs. However, liposome coated CdTe/CdSe/ZnSe multi-core-multi-shell quantum dots show better optical properties, photostability and biocompatibility compared to CdTe/CdSe/ZnSe multi-core-multi-shell quantum dots with ChitNPs coating. These particles therefore show good promise in cell-labelling and drug delivery studies.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinsk bioteknologi -- Biomaterialvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Medical Biotechnology -- Biomaterials Science (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- Biocompatibility
- CdTe/CdSe/ZnSe multi-core-multi-shell QDs
- Cellular imaging
- Nanoliposome and chitosan nanoparticle composite
- Optical properties
- Photostability
Publication and Content Type
- ref (subject category)
- art (subject category)
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