1
|
Halabi EA, Gessner I, Yang KS, Kim JJ, Jana R, Peterson HM, Spitzberg JD, Weissleder R. Magnetic Silica-Coated Fluorescent Microspheres (MagSiGlow) for Simultaneous Detection of Tumor-Associated Proteins. Angew Chem Int Ed Engl 2024; 63:e202318870. [PMID: 38578432 DOI: 10.1002/anie.202318870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/29/2024] [Accepted: 04/03/2024] [Indexed: 04/06/2024]
Abstract
Multiplexed bead assays for solution-phase biosensing often encounter cross-over reactions during signal amplification steps, leading to unwanted false positive and high background signals. Current solutions involve complex custom-designed and costly equipment, limiting their application in simple laboratory setup. In this study, we introduce a straightforward protocol to adapt a multiplexed single-bead assay to standard fluorescence imaging plates, enabling the simultaneous analysis of thousands of reactions per plate. This approach focuses on the design and synthesis of bright fluorescent and magnetic microspheres (MagSiGlow) with multiple fluorescent wavelengths serving as unique detection markers. The imaging-based, single-bead assay, combined with a scripted algorithm, allows the detection, segmentation, and co-localization on average of 7500 microspheres per field of view across five imaging channels in less than one second. We demonstrate the effectiveness of this method with remarkable sensitivity at low protein detection limits (100 pg/mL). This technique showed over 85 % reduction in signal cross-over to the solution-based method after the concurrent detection of tumor-associated protein biomarkers. This approach holds the promise of substantially enhancing high throughput biosensing for multiple targets, seamlessly integrating with rapid image analysis algorithms.
Collapse
Affiliation(s)
- Elias A Halabi
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Isabel Gessner
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Katherine S Yang
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Jae-Jun Kim
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Rupsa Jana
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
- CaNCURE Cancer Nanomedicine Research Program Mugar Life Sciences Bldg, Department of Biochemistry, Northeastern University, 330 Huntington Ave #203, 02115, Boston, MA, USA
| | - Hannah M Peterson
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Joshua D Spitzberg
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
| | - Ralph Weissleder
- Center for Systems Biology Massachusetts General Hospital, Harvard Medial School, 185 Cambridge Street, CPZN 5206, 02114, Boston, MA, USA
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, 02115, Boston, MA, USA
| |
Collapse
|
2
|
Nazari S, Abdelrasoul A. Impact of Membrane Modification and Surface Immobilization Techniques on the Hemocompatibility of Hemodialysis Membranes: A Critical Review. MEMBRANES 2022; 12:1063. [PMID: 36363617 PMCID: PMC9698264 DOI: 10.3390/membranes12111063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Despite significant research efforts, hemodialysis patients have poor survival rates and low quality of life. Ultrafiltration (UF) membranes are the core of hemodialysis treatment, acting as a barrier for metabolic waste removal and supplying vital nutrients. So, developing a durable and suitable membrane that may be employed for therapeutic purposes is crucial. Surface modificationis a useful solution to boostmembrane characteristics like roughness, charge neutrality, wettability, hemocompatibility, and functionality, which are important in dialysis efficiency. The modification techniques can be classified as follows: (i) physical modification techniques (thermal treatment, polishing and grinding, blending, and coating), (ii) chemical modification (chemical methods, ozone treatment, ultraviolet-induced grafting, plasma treatment, high energy radiation, and enzymatic treatment); and (iii) combination methods (physicochemical). Despite the fact that each strategy has its own set of benefits and drawbacks, all of these methods yielded noteworthy outcomes, even if quantifying the enhanced performance is difficult. A hemodialysis membrane with outstanding hydrophilicity and hemocompatibility can be achieved by employing the right surface modification and immobilization technique. Modified membranes pave the way for more advancement in hemodialysis membrane hemocompatibility. Therefore, this critical review focused on the impact of the modification method used on the hemocompatibility of dialysis membranes while covering some possible modifications and basic research beyond clinical applications.
Collapse
Affiliation(s)
- Simin Nazari
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| | - Amira Abdelrasoul
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| |
Collapse
|
3
|
Modified silica nanoparticle coatings: Dual antifouling effects of self-assembled quaternary ammonium and zwitterionic silanes. Biointerphases 2020; 15:021009. [PMID: 32264685 DOI: 10.1116/1.5143141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This work examines the antifouling effect of quaternary ammonium silane (QAS) grafted from coatings of silica nanoparticles (SiNPs), independently and in combination with a zwitterionic sulfobetaine (SB) silane. The binding of QAS to the SiNP coatings was monitored using quartz crystal microgravimetry with dissipation monitoring (QCM-D) under varied pH and solution concentrations. Adsorption of bovine serum albumin protein was reduced on QAS modified SiNP coatings prepared under alkaline conditions due to the proposed generation of a pseudozwitterionic interface, where the underlying SiNP surface presents an anionic charge at high pH. Significant reductions in protein binding were achieved at low functionalization concentrations and short modification times. Additionally, SiNP coatings modified with a combination of QAS and SB chemistries were investigated. Surface modifications were performed sequentially, varying silane concentration and order of addition, and monitored using QCM-D. Dual-functionalized surfaces presented enhanced resistance to protein adsorption compared to QAS or SB modified surfaces alone, even at low functionalization concentrations. The antiadhesive and antibacterial properties of functionalized surfaces were investigated by challenging the surfaces against the bacterium Escherichia coli. All dual-functionalized coatings showed equal or reduced bacterial adhesion compared to QAS and SB functionalizations alone, while coatings functionalized with high concentrations of combined chemistries reduced the adhesion of bacteria by up to 95% compared to control SiNP surfaces.
Collapse
|