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Wójtowicz K, Antoniak MA, Trojnar M, Nyk M, Trombik T, Grzyb J. QD:Puf Nanohybrids Are Compatible with Studies in Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3174. [PMID: 36144961 PMCID: PMC9506232 DOI: 10.3390/nano12183174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/10/2022] [Accepted: 09/11/2022] [Indexed: 06/16/2023]
Abstract
Colloidal semiconductor quantum dots (QD), as well as other nanoparticles, are useful in cell studies as fluorescent labels. They may also be used as more active components in various cellular assays, serving as sensors or effectors. However, not all QDs are biocompatible. One of the main problems is their outer coat, which needs to be stable and to sustain hydrophilicity. Here we show that purpose-designed CdSe QDs, covered with a Puf protein, can be efficiently accumulated by HeLa cells. The uptake was measurable after a few hours of incubation with nanoparticles and most of the fluorescence was localised in the internal membrane system of the cell, including the endoplasmic reticulum and the Golgi apparatus. The fluorescence properties of QDs were mostly preserved, although the maximum emission wavelength was slightly shifted, and the fluorescence lifetime was shortened, indicating partial sensitivity of the QDs to the cell microenvironment. QD accumulation resulted in a decrease in cell viability, which was attributed to disturbance of endoplasmic reticulum performance.
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Affiliation(s)
- Karolina Wójtowicz
- Department of Biotransformation, Faculty of Biotechnology, University of Wrocław, ul. F. Joliot-Curie 14a, 50-383 Wrocław, Poland
| | - Magda A. Antoniak
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Martyna Trojnar
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, ul. F. Joliot-Curie 14a, 50-383 Wrocław, Poland
| | - Marcin Nyk
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Tomasz Trombik
- Department of Biotransformation, Faculty of Biotechnology, University of Wrocław, ul. F. Joliot-Curie 14a, 50-383 Wrocław, Poland
- The Chair and Department of Biochemistry and Molecular Biology, Medical University of Lublin, ul. Chodzki 1, 20-093 Lublin, Poland
| | - Joanna Grzyb
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, ul. F. Joliot-Curie 14a, 50-383 Wrocław, Poland
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Kopeć K, Pędziwiatr M, Gront D, Sztatelman O, Sławski J, Łazicka M, Worch R, Zawada K, Makarova K, Nyk M, Grzyb J. Comparison of α-Helix and β-Sheet Structure Adaptation to a Quantum Dot Geometry: Toward the Identification of an Optimal Motif for a Protein Nanoparticle Cover. ACS OMEGA 2019; 4:13086-13099. [PMID: 31460436 PMCID: PMC6705085 DOI: 10.1021/acsomega.9b00505] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/23/2019] [Indexed: 05/31/2023]
Abstract
While quantum dots (QDs) are useful as fluorescent labels, their application in biosciences is limited due to the stability and hydrophobicity of their surface. In this study, we tested two types of proteins for use as a cover for spherical QDs, composed of cadmium selenide. Pumilio homology domain (Puf), which is mostly α-helical, and leucine-rich repeat (LRR) domain, which is rich in β-sheets, were selected to determine if there is a preference for one of these secondary structure types for nanoparticle covers. The protein sequences were optimized to improve their interaction with the surface of QDs. The solubilization of the apoproteins and their assembly with nanoparticles required the application of a detergent, which was removed in subsequent steps. Finally, only the Puf-based cover was successful enough as a QD hydrophilic cover. We showed that a single polypeptide dimer of Puf, PufPuf, can form a cover. We characterized the size and fluorescent properties of the obtained QD:protein assemblies. We showed that the secondary structure of the Puf proteins was not destroyed upon contact with the QDs. We demonstrated that these assemblies do not promote the formation of reactive oxygen species during illumination of the nanoparticles. The data represent advances in the effort to obtain a stable biocompatible cover for QDs.
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Affiliation(s)
- Katarzyna Kopeć
- Institute
of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL02668 Warsaw, Poland
| | - Marta Pędziwiatr
- Institute
of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL02668 Warsaw, Poland
| | - Dominik Gront
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, PL02093 Warsaw, Poland
| | - Olga Sztatelman
- Institute
of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, PL02106 Warsaw, Poland
| | - Jakub Sławski
- Department
of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie Street 14a, PL50383 Wrocław, Poland
| | - Magdalena Łazicka
- Department
of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, PL02096 Warsaw, Poland
| | - Remigiusz Worch
- Institute
of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL02668 Warsaw, Poland
| | - Katarzyna Zawada
- Department
of Physical Chemistry, Faculty of Pharmacy with the Laboratory Medicine
Division, The Medical University of Warsaw, Banacha 1 Street, PL02097 Warsaw, Poland
| | - Katerina Makarova
- Department
of Physical Chemistry, Faculty of Pharmacy with the Laboratory Medicine
Division, The Medical University of Warsaw, Banacha 1 Street, PL02097 Warsaw, Poland
| | - Marcin Nyk
- Advanced
Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego
27, PL50370 Wrocław, Poland
| | - Joanna Grzyb
- Department
of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie Street 14a, PL50383 Wrocław, Poland
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