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Zang Z, Xiao D, Wang Q, Li Z, Xie W, Chen Y, Li DDU. Fast Analysis of Time-Domain Fluorescence Lifetime Imaging via Extreme Learning Machine. SENSORS 2022; 22:s22103758. [PMID: 35632167 PMCID: PMC9146214 DOI: 10.3390/s22103758] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 01/25/2023]
Abstract
We present a fast and accurate analytical method for fluorescence lifetime imaging microscopy (FLIM), using the extreme learning machine (ELM). We used extensive metrics to evaluate ELM and existing algorithms. First, we compared these algorithms using synthetic datasets. The results indicate that ELM can obtain higher fidelity, even in low-photon conditions. Afterwards, we used ELM to retrieve lifetime components from human prostate cancer cells loaded with gold nanosensors, showing that ELM also outperforms the iterative fitting and non-fitting algorithms. By comparing ELM with a computational efficient neural network, ELM achieves comparable accuracy with less training and inference time. As there is no back-propagation process for ELM during the training phase, the training speed is much higher than existing neural network approaches. The proposed strategy is promising for edge computing with online training.
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Affiliation(s)
- Zhenya Zang
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G4 0RE, UK; (Z.Z.); (D.X.); (Q.W.); (W.X.)
| | - Dong Xiao
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G4 0RE, UK; (Z.Z.); (D.X.); (Q.W.); (W.X.)
| | - Quan Wang
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G4 0RE, UK; (Z.Z.); (D.X.); (Q.W.); (W.X.)
| | - Zinuo Li
- Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK; (Z.L.); (Y.C.)
| | - Wujun Xie
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G4 0RE, UK; (Z.Z.); (D.X.); (Q.W.); (W.X.)
| | - Yu Chen
- Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK; (Z.L.); (Y.C.)
| | - David Day Uei Li
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G4 0RE, UK; (Z.Z.); (D.X.); (Q.W.); (W.X.)
- Correspondence:
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Kepinska M, Kizek R, Milnerowicz H. Fullerene as a doxorubicin nanotransporter for targeted breast cancer therapy: Capillary electrophoresis analysis. Electrophoresis 2018; 39:2370-2379. [PMID: 29931716 DOI: 10.1002/elps.201800148] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/14/2018] [Accepted: 06/17/2018] [Indexed: 12/31/2022]
Abstract
The clinical use of doxorubicin (DOX) is limited by dose-related cardiomyopathy, which becomes more prevalent with increasing cumulative doses of the drug. Complexes of fullerene with DOX were designed and studied using biophysical methods. The ability of DOX to release from fullerene at different pHs was analyzed. It has been shown that the size of the fullerene-DOX complexes was ∼280 nm. The zeta potential for fullerene was -30 mV, for DOX -8 mV, and for fullerene-DOX conjugates -24 mV. Drug release was studied by CE with LIF detection. When fullerene-DOX conjugates were separated in a pH 7.5 buffer, 43% of all DOX signals were derived from free DOX, with the signal increasing as pH decreased. At pH 5.25, all DOX had been released and 100% of the signal was derived from free DOX. The release of DOX from complexes with fullerene at lower pH can be used in targeted antineoplastic therapy, resulting in lower toxicity for less acidic non-target tissue.
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Affiliation(s)
- Marta Kepinska
- Department of Biomedical and Environmental Analyses, Faculty of Pharmacy with Division of Laboratory Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Rene Kizek
- Department of Biomedical and Environmental Analyses, Faculty of Pharmacy with Division of Laboratory Medicine, Wroclaw Medical University, Wroclaw, Poland.,Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Halina Milnerowicz
- Department of Biomedical and Environmental Analyses, Faculty of Pharmacy with Division of Laboratory Medicine, Wroclaw Medical University, Wroclaw, Poland
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Heterogeneity in tumor chromatin-doxorubicin binding revealed by in vivo fluorescence lifetime imaging confocal endomicroscopy. Nat Commun 2018; 9:2662. [PMID: 29985394 PMCID: PMC6037736 DOI: 10.1038/s41467-018-04820-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 05/24/2018] [Indexed: 12/26/2022] Open
Abstract
We present an approach to quantify drug-target engagement using in vivo fluorescence endomicroscopy, validated with in vitro measurements. Doxorubicin binding to chromatin changes the fluorescence lifetime of histone-GFP fusions that we measure in vivo at single-cell resolution using a confocal laparo/endomicroscope. We measure both intra- and inter-tumor heterogeneity in doxorubicin chromatin engagement in a model of peritoneal metastasis of ovarian cancer, revealing striking variation in the efficacy of doxorubicin-chromatin binding depending on intra-peritoneal or intravenous delivery. Further, we observe significant variations in doxorubicin-chromatin binding between different metastases in the same mouse and between different regions of the same metastasis. The quantitative nature of fluorescence lifetime imaging enables direct comparison of drug-target engagement for different drug delivery routes and between in vitro and in vivo experiments. This uncovers different rates of cell killing for the same level of doxorubicin binding in vitro and in vivo.
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Michalek P, Dostalova S, Buchtelova H, Cernei N, Krejcova L, Hynek D, Milosavljevic V, Jimenez AMJ, Kopel P, Heger Z, Adam V. A two-step protocol for isolation of influenza A (H7N7) virions and their RNA for PCR diagnostics based on modified paramagnetic particles. Electrophoresis 2016; 37:2025-35. [PMID: 27130152 DOI: 10.1002/elps.201600044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/11/2016] [Accepted: 04/11/2016] [Indexed: 01/18/2023]
Abstract
Annual epidemics of influenza cause death of hundreds of thousands people and they also have a significant economic impact. Hence, a need for fast and cheap influenza diagnostic method is arising. The conventional methods for an isolation of the viruses are time-consuming and require expensive instrumentation as well as trained personnel. In this study, we modified the surface of nanomaghemite (γ-Fe2 O3 ) paramagnetic core with tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane and the resulting particles were utilized for the isolation of H7N7 influenza virions. Consequently, we designed γ-Fe2 O3 paramagnetic core modified with calcium tripolyphosphate which was employed for the isolation of viral nucleic acid after virion's lysis. Both of these procedures can be performed rapidly in less than 10 min and, in combination with the RT-PCR, the whole influenza detection can be shortened to few hours. Moreover, the whole protocol could be easily automated and/or miniaturized, and thus can serve as a basis for use in a lab-on-a-chip device. We assume that magnetic isolation is an exceptional procedure which can significantly accelerate the diagnostic possibilities of a broad spectrum of diseases.
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Affiliation(s)
- Petr Michalek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Simona Dostalova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Hana Buchtelova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Natalia Cernei
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Ludmila Krejcova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - David Hynek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Vedran Milosavljevic
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Ana Maria Jimenez Jimenez
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Pavel Kopel
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
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Michalek P, Richtera L, Krejcova L, Nejdl L, Kensova R, Zitka J, Kopel P, Heger Z, Adam V, Kizek R. Bioconjugation of peptides using advanced nanomaterials to examine their interactions in 3D printed flow-through device. Electrophoresis 2015; 37:444-54. [DOI: 10.1002/elps.201500345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/06/2015] [Accepted: 10/06/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Petr Michalek
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Lukas Richtera
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Ludmila Krejcova
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Lukas Nejdl
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Renata Kensova
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Jan Zitka
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Pavel Kopel
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry; Mendel University; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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HEGER ZBYNEK, MICHALEK PETR, GURAN ROMAN, CERNEI NATALIA, DUSKOVA KATERINA, VESELY STEPAN, ANYZ JIRI, STEPANKOVA OLGA, ZITKA ONDREJ, ADAM VOJTECH, KIZEK RENE. Differences in urinary proteins related to surgical margin status after radical prostatectomy. Oncol Rep 2015; 34:3247-55. [DOI: 10.3892/or.2015.4322] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 07/13/2015] [Indexed: 11/05/2022] Open
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