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Kumar D, Moghiseh M, Chitcholtan K, Mutreja I, Lowe C, Kaushik A, Butler A, Sykes P, Anderson N, Raja A. LHRH conjugated gold nanoparticles assisted efficient ovarian cancer targeting evaluated via spectral photon-counting CT imaging: a proof-of-concept research. J Mater Chem B 2023; 11:1916-1928. [PMID: 36744575 DOI: 10.1039/d2tb02416k] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Emerging multifunctional nanoparticulate formulations take advantage of nano-meter scale size and surface chemistry to work as a therapeutic delivery agent and a diagnostic tool for non-invasive real-time monitoring using imaging technologies. Here, we evaluate the selective uptake of 18 nm and 80 nm sized gold nanoparticles (AuNPs) by SKOV3 (4 times higher) ovarian cancer (OC) cells (compared to OVCAR5) in vitro, quantified by inductively coupled plasma (ICP) and MARS spectral photon-counting CT imaging (MARS SPCCT). Based on in vitro analysis, pristine AuNPs (18 nm) and surface modified AuNPs (18 nm) were chosen as a contrast agent for MARS SPCCT. The chemical analysis by FTIR spectroscopy confirmed the luteinizing hormone-releasing hormone (LHRH) conjugation to the AuNPs surface. For the first time, LHRH conjugated AuNPs were used for in vitro and selective in vivo OC targeting. The ICP-MS analysis confirmed preferential uptake of LHRH modified AuNPs by organs residing in the abdominal cavity with OC nodules (pancreas: 0.46 ng mg-1, mesentery: 0.89 ng mg-1, ovary: 1.43 ng mg-1, and abdominal wall: 2.12 ng mg-1) whereas the MARS SPCCT analysis suggested scattered accumulation of metal around the abdominal cavity. Therefore, the study showed the exciting potential of LHRH conjugated AuNPs to target ovarian cancer and also as a potential contrast agent for novel SPCCT imaging technology.
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Affiliation(s)
- Dhiraj Kumar
- Division of Pediatrics Dentistry, School of Dentistry, University of Minnesota, 515 Delaware St SE, Minneapolis, Minnesota, 55455, USA. .,Department of Obstetrics and Gynaecology, Christchurch Women Hospital, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand
| | - Mahdieh Moghiseh
- Department of Radiology, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand.,MARS Bioimaging Limited, Christchurch, New Zealand
| | - Kenny Chitcholtan
- Department of Obstetrics and Gynaecology, Christchurch Women Hospital, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand
| | - Isha Mutreja
- Minnesota Dental Research Center for Biomaterials and Biomechanics (MDRCBB), School of Dentistry, University of Minnesota, 515 Delaware St SE, Minneapolis, Minnesota, 55455, USA
| | - Chiara Lowe
- Department of Radiology, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand.,MARS Bioimaging Limited, Christchurch, New Zealand
| | - Ajeet Kaushik
- NanoBiotech Laboratory, Department of Environmental Engineering, Florida Polytechnic University, FL, 33805, USA
| | - Anthony Butler
- Department of Radiology, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand.,MARS Bioimaging Limited, Christchurch, New Zealand
| | - Peter Sykes
- Department of Obstetrics and Gynaecology, Christchurch Women Hospital, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand
| | - Nigel Anderson
- Department of Radiology, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand
| | - Aamir Raja
- Department of Radiology, University of Otago Christchurch, 2 Riccarton Ave, School of Medicine, Christchurch, New Zealand.,Department of Physics, Khalifa University, Abu Dhabi, United Arab Emirates
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Salehirozveh M, Porro A, Thei F. Large-scale production of polyimide micropore-based flow cells for detecting nano-sized particles in fluids. RSC Adv 2023; 13:873-880. [PMID: 36686911 PMCID: PMC9811244 DOI: 10.1039/d2ra07423k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 12/12/2022] [Indexed: 01/06/2023] Open
Abstract
In diagnostic and sequencing applications, solid-state nanopores hold significant promise as a single-molecule sensing platform. The fabrication of precisely sized pores has traditionally been challenging, laborious, expensive, and inefficient, which has limited its applications until recently. To overcome this problem, this paper proposes a novel, reliable, cost-effective, portable, mass-productive, robust, and ease-of-use micropore flow cell that works based on the resistive pulse sensor (RPS) technique in order to distinguish the different sizes of c nanoparticles. RPS is a robust and informative technique that can provide valuable details of the size, shape, charge, and individual particle concentrations in the media. By femtosecond laser drilling of a polyimide substrate as an alternate material, translocation of 100, 300, and 350 nm polystyrene nanoparticles in PBS buffer was distinguished by 0.1, 1, and 2 nA current blockade levels, respectively. This is the first time a micropore has been opened in a polyimide membrane using a femtosecond laser in a single step. The experimental and theoretical investigation, scanning electron microscopy and focused ion beam spectroscopy were performed to comprehensively explain the micropore's performance. We showed that our innovative micropore-based flow cell could distinguish nano-sized particles in fluids, and it can be used in large-scale production because of its simplicity and cost-effectiveness.
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Affiliation(s)
- Mostafa Salehirozveh
- Department Of Physics And Astronomy, University of BolognaBolognaItaly,Elements SRLCesenaItaly
| | - Alessandro Porro
- Department of Biosciences, University of MilanMilanItaly,Elements SRLCesenaItaly
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Liu X, Liu J, Zhao X, Zhang D, Wang Q. Ag NPs/PMMA nanocomposite as an efficient platform for fluorescence regulation of riboflavin. OPTICS EXPRESS 2022; 30:34918-34931. [PMID: 36242494 DOI: 10.1364/oe.470454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
The fluorescence detection platform has broad application in many fields. In this paper, we report a simple and efficient fluorescence detection platform based on the synergistic effects of Ag nanoparticles (Ag NPs) and polymethylmethacrylate (PMMA). Ag NPs were introduced to realize the plasmon enhancement fluorescence and a thin PMMA layer was used to adjust the distance between Ag NPs and riboflavin. The thin PMMA layer not only enhances the fluorescence by enhancing adhesion of substrate, but also optimizes the plasmon enhancement fluorescence effect by serving as the spacer. The fluorescence enhancement factor based on this platform shows a trend of increasing with the decrease of the concentration of riboflavin, and the detection of riboflavin is realized based on this feature, the lowest detectable concentration is as low as 0.27 µM. In addition to the detection based on plasmon enhancement fluorescence, the detection of riboflavin at low concentrations can also be realized by the shift and broadening of the fluorescence peak due to the Ag NPs. The combination of the two ways of plasmon enhancement fluorescence and shift of the fluorescence spectra is used for the detection of riboflavin. These results show that the platform has great potential applications in the field of detection and sensing.
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Bai J, Li X, Wang X, Zhou Q, Ni K. Chromatic Confocal Displacement Sensor with Optimized Dispersion Probe and Modified Centroid Peak Extraction Algorithm. SENSORS 2019; 19:s19163592. [PMID: 31426566 PMCID: PMC6719189 DOI: 10.3390/s19163592] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/12/2019] [Accepted: 08/16/2019] [Indexed: 11/16/2022]
Abstract
Chromatic confocal technology (CCT) is one of the most promising methods for the contactless and accurate measurement of structure profiles. Based on the principles of chromatic dispersion and confocal theory, a dispersion probe is proposed and optimized with several commercial and cheap refractive index lenses. The probe provides 0.3× magnification and a dispersion range of 400 μm with a commercial LED source with an effective bandwidth of ca. 450-623 nm. Since the noise fluctuation can affect the extraction stability of the focal wavelength, a modification to the centroid peak extraction algorithm is proposed in this paper, where several virtual pixels are interpolated among the real pixels of the spectrometer before thresholding. In addition, a series of experiments were carried out to test the system's displacement measurement performance. The results clearly show that stability is improved by the modified algorithm, and the calibration repeatability is ±0.3 μm in the full measurement range with a linear stage. The standard deviation at the fixed position has an optimal value of 0.009 μm. The section profile of a Fresnel lens is measured by the CCT system to demonstrate its high feasibility and efficiency.
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Affiliation(s)
- Jiao Bai
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, China
| | - Xinghui Li
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Xiaohao Wang
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Qian Zhou
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Kai Ni
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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