1
|
Ermis M, Antmen E, Kuren O, Demirci U, Hasirci V. A Cell Culture Chip with Transparent, Micropillar-Decorated Bottom for Live Cell Imaging and Screening of Breast Cancer Cells. MICROMACHINES 2022; 13:mi13010093. [PMID: 35056257 PMCID: PMC8779566 DOI: 10.3390/mi13010093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 12/30/2022]
Abstract
In the recent years, microfabrication technologies have been widely used in cell biology, tissue engineering, and regenerative medicine studies. Today, the implementation of microfabricated devices in cancer research is frequent and advantageous because it enables the study of cancer cells in controlled microenvironments provided by the microchips. Breast cancer is one of the most common cancers in women, and the way breast cancer cells interact with their physical microenvironment is still under investigation. In this study, we developed a transparent cell culture chip (Ch-Pattern) with a micropillar-decorated bottom that makes live imaging and monitoring of the metabolic, proliferative, apoptotic, and morphological behavior of breast cancer cells possible. The reason for the use of micropatterned surfaces is because cancer cells deform and lose their shape and acto-myosin integrity on micropatterned substrates, and this allows the quantification of the changes in morphology and through that identification of the cancerous cells. In the last decade, cancer cells were studied on micropatterned substrates of varying sizes and with a variety of biomaterials. These studies were conducted using conventional cell culture plates carrying patterned films. In the present study, cell culture protocols were conducted in the clear-bottom micropatterned chip. This approach adds significantly to the current knowledge and applications by enabling low-volume and high-throughput processing of the cell behavior, especially the cell–micropattern interactions. In this study, two different breast cancer cell lines, MDA-MB-231 and MCF-7, were used. MDA-MB-231 cells are invasive and metastatic, while MCF-7 cells are not metastatic. The nuclei of these two cell types deformed to distinctly different levels on the micropatterns, had different metabolic and proliferation rates, and their cell cycles were affected. The Ch-Pattern chips developed in this study proved to have significant advantages when used in the biological analysis of live cells and highly beneficial in the study of screening breast cancer cell–substrate interactions in vitro.
Collapse
Affiliation(s)
- Menekse Ermis
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara 06800, Turkey; (M.E.); (E.A.); (O.K.)
| | - Ezgi Antmen
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara 06800, Turkey; (M.E.); (E.A.); (O.K.)
| | - Ozgur Kuren
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara 06800, Turkey; (M.E.); (E.A.); (O.K.)
| | - Utkan Demirci
- Canary Center for Cancer Early Detection, Department of Radiology, Electrical Engineering Department, Stanford University, Palo Alto, CA 94305, USA;
| | - Vasif Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara 06800, Turkey; (M.E.); (E.A.); (O.K.)
- Department of Medical Engineering, Acibadem Mehmet Ali Aydinlar University, Istanbul 34684, Turkey
- ACU Biomaterials Center, Acibadem Mehmet Ali Aydinlar University, Istanbul 34684, Turkey
- Correspondence:
| |
Collapse
|
2
|
Weinhold E, Chakraborty B. DNA modification and visualization on an origami-based enzyme nano-factory. NANOSCALE 2021; 13:2465-2471. [PMID: 33471009 DOI: 10.1039/d0nr07618j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The past decade has seen enormous progress in DNA nanotechnology through the advent of DNA origami. Functionalizing the DNA origami for multiple applications is the recent focus of this field. Here we have constructed a novel DNA enzyme nano-factory, which modifies target DNA embedded on a DNA origami platform. The enzyme is programmed to reside in close proximity to the target DNA which enhances significantly the local concentration compared to solution-based DNA modification. To demonstrate this we have immobilized DNA methyltransferase M·TaqI next to the target DNA on the DNA origami and used this enzyme to sequence-specifically modify the target DNA with biotin using a cofactor analogue. Streptavidin binding to biotin is applied as a topographic marker to follow the machine cycle of this enzyme nano-factory using atomic force microscopy imaging. The nano-factory is demonstrated to be recyclable and holds the potential to be expanded to a multi-enzyme, multi-substrate operating system controlled by simple to complex molecules made of DNA, RNA or proteins.
Collapse
Affiliation(s)
- Elmar Weinhold
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Banani Chakraborty
- Department of Chemical Engineering, Indian Institute of Science, Bangalore 560012, India.
| |
Collapse
|
3
|
Insight into the binding and conformational changes of hemoglobin/lysozyme with bimetallic alloy nanoparticles using various spectroscopic approaches. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111747] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
4
|
Christodoulides N, McRae MP, Simmons GW, Modak SS, McDevitt JT. Sensors that Learn: The Evolution from Taste Fingerprints to Patterns of Early Disease Detection. MICROMACHINES 2019; 10:E251. [PMID: 30995728 PMCID: PMC6523560 DOI: 10.3390/mi10040251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/22/2019] [Accepted: 04/12/2019] [Indexed: 11/23/2022]
Abstract
The McDevitt group has sustained efforts to develop a programmable sensing platform that offers advanced, multiplexed/multiclass chem-/bio-detection capabilities. This scalable chip-based platform has been optimized to service real-world biological specimens and validated for analytical performance. Fashioned as a sensor that learns, the platform can host new content for the application at hand. Identification of biomarker-based fingerprints from complex mixtures has a direct linkage to e-nose and e-tongue research. Recently, we have moved to the point of big data acquisition alongside the linkage to machine learning and artificial intelligence. Here, exciting opportunities are afforded by multiparameter sensing that mimics the sense of taste, overcoming the limitations of salty, sweet, sour, bitter, and glutamate sensing and moving into fingerprints of health and wellness. This article summarizes developments related to the electronic taste chip system evolving into a platform that digitizes biology and affords clinical decision support tools. A dynamic body of literature and key review articles that have contributed to the shaping of these activities are also highlighted. This fully integrated sensor promises more rapid transition of biomarker panels into wide-spread clinical practice yielding valuable new insights into health diagnostics, benefiting early disease detection.
Collapse
Affiliation(s)
- Nicolaos Christodoulides
- Department of Biomaterials, College of Dentistry, Bioengineering Institute, New York University, New York, NY 10010, USA.
| | - Michael P McRae
- Department of Biomaterials, College of Dentistry, Bioengineering Institute, New York University, New York, NY 10010, USA.
| | - Glennon W Simmons
- Department of Biomaterials, College of Dentistry, Bioengineering Institute, New York University, New York, NY 10010, USA.
| | - Sayli S Modak
- Department of Biomaterials, College of Dentistry, Bioengineering Institute, New York University, New York, NY 10010, USA.
| | - John T McDevitt
- Department of Biomaterials, College of Dentistry, Bioengineering Institute, New York University, New York, NY 10010, USA.
| |
Collapse
|
5
|
Eckerle M, Ambroggio L, Puskarich M, Winston B, Jones AE, Standiford TJ, Stringer KA. Metabolomics as a Driver in Advancing Precision Medicine in Sepsis. Pharmacotherapy 2017; 37:1023-1032. [PMID: 28632924 PMCID: PMC5600684 DOI: 10.1002/phar.1974] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The objective of this review is to explain the science of metabolomics-a science of systems biology that measures and studies endogenous small molecules (metabolites) that are present in a single biological sample-and its application to the diagnosis and treatment of sepsis. In addition, we discuss how discovery through metabolomics can contribute to the development of precision medicine targets for this complex disease state and the potential avenues for those new discoveries to be applied in the clinical environment. A nonsystematic literature review was performed focusing on metabolomics, pharmacometabolomics, and sepsis. Human (adult and pediatric) and animal studies were included. Metabolomics has been investigated in the diagnosis, prognosis, and risk stratification of sepsis, as well as for the identification of drug target opportunities. Metabolomics elucidates a new level of detail when compared with other systems biology sciences, with regard to the metabolites that are most relevant in the pathophysiology of sepsis, as well as highlighting specific biochemical pathways at work in sepsis. Metabolomics also highlights biochemical differences between sepsis survivors and nonsurvivors at a level of detail greater than that demonstrated by genomics, transcriptomics, or proteomics, potentially leading to actionable targets for new therapies. The application of pharmacometabolomics and its integration with other systems pharmacology to sepsis therapeutics could be particularly helpful in differentiating drug responders and nonresponders and furthering knowledge of mechanisms of drug action and response. The accumulated literature on metabolomics suggests it is a viable tool for continued discovery around the pathophysiology, diagnosis and prognosis, and treatment of sepsis in both adults and children, and it provides a greater level of biochemical detail and insight than other systems biology approaches. However, the clinical application of metabolomics in sepsis has not yet been fully realized. Prospective validation studies are needed to translate metabolites from the discovery phase into the clinical utility phase.
Collapse
Affiliation(s)
- Michelle Eckerle
- Division of Emergency Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Lilliam Ambroggio
- Division of Hospital Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Michael Puskarich
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, MS
| | - Brent Winston
- Departments of Critical Care, Medicine and Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Alan E. Jones
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, MS
| | - Theodore J. Standiford
- Division of Pulmonary and Critical Care Medicine, College of Pharmacy, University of Michigan, Ann Arbor, MI
- Michigan Center for Integrative Research in Critical Care, College of Pharmacy, University of Michigan, Ann Arbor, MI
| | - Kathleen A. Stringer
- Division of Pulmonary and Critical Care Medicine, College of Pharmacy, University of Michigan, Ann Arbor, MI
- Michigan Center for Integrative Research in Critical Care, College of Pharmacy, University of Michigan, Ann Arbor, MI
- School of Medicine and Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, MI
| |
Collapse
|
6
|
Christodoulides NJ, McRae MP, Abram TJ, Simmons GW, McDevitt JT. Innovative Programmable Bio-Nano-Chip Digitizes Biology Using Sensors That Learn Bridging Biomarker Discovery and Clinical Implementation. Front Public Health 2017; 5:110. [PMID: 28589118 PMCID: PMC5441161 DOI: 10.3389/fpubh.2017.00110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 05/02/2017] [Indexed: 11/13/2022] Open
Abstract
The lack of standard tools and methodologies and the absence of a streamlined multimarker approval process have hindered the translation rate of new biomarkers into clinical practice for a variety of diseases afflicting humankind. Advanced novel technologies with superior analytical performance and reduced reagent costs, like the programmable bio-nano-chip system featured in this article, have potential to change the delivery of healthcare. This universal platform system has the capacity to digitize biology, resulting in a sensor modality with a capacity to learn. With well-planned device design, development, and distribution plans, there is an opportunity to translate benchtop discoveries in the genomics, proteomics, metabolomics, and glycomics fields by transforming the information content of key biomarkers into actionable signatures that can empower physicians and patients for a better management of healthcare. While the process is complicated and will take some time, showcased here are three application areas for this flexible platform that combines biomarker content with minimally invasive or non-invasive sampling, such as brush biopsy for oral cancer risk assessment; serum, plasma, and small volumes of blood for the assessment of cardiac risk and wellness; and oral fluid sampling for drugs of abuse testing at the point of need.
Collapse
Affiliation(s)
- Nicolaos J. Christodoulides
- Department of Biomaterials, Bioengineering Institute, New York University College of Dentistry, New York, NY, USA
| | - Michael P. McRae
- Department of Biomaterials, Bioengineering Institute, New York University College of Dentistry, New York, NY, USA
| | | | - Glennon W. Simmons
- Department of Biomaterials, Bioengineering Institute, New York University College of Dentistry, New York, NY, USA
| | - John T. McDevitt
- Department of Biomaterials, Bioengineering Institute, New York University College of Dentistry, New York, NY, USA
| |
Collapse
|
7
|
McRae MP, Bozkurt B, Ballantyne CM, Sanchez X, Christodoulides N, Simmons G, Nambi V, Misra A, Miller CS, Ebersole JL, Campbell C, McDevitt JT. Cardiac ScoreCard: A Diagnostic Multivariate Index Assay System for Predicting a Spectrum of Cardiovascular Disease. EXPERT SYSTEMS WITH APPLICATIONS 2016; 54:136-147. [PMID: 31467464 PMCID: PMC6715313 DOI: 10.1016/j.eswa.2016.01.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Clinical decision support systems (CDSSs) have the potential to save lives and reduce unnecessary costs through early detection and frequent monitoring of both traditional risk factors and novel biomarkers for cardiovascular disease (CVD). However, the widespread adoption of CDSSs for the identification of heart diseases has been limited, likely due to the poor interpretability of clinically relevant results and the lack of seamless integration between measurements and disease predictions. In this paper we present the Cardiac ScoreCard-a multivariate index assay system with the potential to assist in the diagnosis and prognosis of a spectrum of CVD. The Cardiac ScoreCard system is based on lasso logistic regression techniques which utilize both patient demographics and novel biomarker data for the prediction of heart failure (HF) and cardiac wellness. Lasso logistic regression models were trained on a merged clinical dataset comprising 579 patients with 6 traditional risk factors and 14 biomarker measurements. The prediction performance of the Cardiac ScoreCard was assessed with 5-fold cross-validation and compared with reference methods. The experimental results reveal that the ScoreCard models improved performance in discriminating disease versus non-case (AUC = 0.8403 and 0.9412 for cardiac wellness and HF, respectively), and the models exhibit good calibration. Clinical insights to the prediction of HF and cardiac wellness are provided in the form of logistic regression coefficients which suggest that augmenting the traditional risk factors with a multimarker panel spanning a diverse cardiovascular pathophysiology provides improved performance over reference methods. Additionally, a framework is provided for seamless integration with biomarker measurements from point-of-care medical microdevices, and a lasso-based feature selection process is described for the down-selection of biomarkers in multimarker panels.
Collapse
Affiliation(s)
| | - Biykem Bozkurt
- Michael E. DeBakey VA Medical Center, Houston, TX, USA
- Section of Cardiology, Baylor College of Medicine, Houston, TX, USA
| | | | - Ximena Sanchez
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Glennon Simmons
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Vijay Nambi
- Michael E. DeBakey VA Medical Center, Houston, TX, USA
- Section of Cardiology, Baylor College of Medicine, Houston, TX, USA
| | | | - Craig S. Miller
- Department of Oral Health Practice, Center for Oral Health Research, College of Dentistry University of Kentucky, Lexington, KY, USA
| | - Jeffrey L. Ebersole
- Department of Oral Health Practice, Center for Oral Health Research, College of Dentistry University of Kentucky, Lexington, KY, USA
| | - Charles Campbell
- Department of Cardiology, Erlanger Health System, Chattanooga, TN, USA
| | - John T. McDevitt
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| |
Collapse
|
8
|
McRae MP, Simmons G, McDevitt JT. Challenges and opportunities for translating medical microdevices: insights from the programmable bio-nano-chip. Bioanalysis 2016; 8:905-19. [PMID: 27071710 PMCID: PMC4870725 DOI: 10.4155/bio-2015-0023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/04/2016] [Indexed: 12/11/2022] Open
Abstract
This perspective highlights the major challenges for the bioanalytical community, in particular the area of lab-on-a-chip sensors, as they relate to point-of-care diagnostics. There is a strong need for general-purpose and universal biosensing platforms that can perform multiplexed and multiclass assays on real-world clinical samples. However, the adoption of novel lab-on-a-chip/microfluidic devices has been slow as several key challenges remain for the translation of these new devices to clinical practice. A pipeline of promising medical microdevice technologies will be made possible by addressing the challenges of integration, failure to compete with cost and performance of existing technologies, requisite for new content, and regulatory approval and clinical adoption.
Collapse
Affiliation(s)
- Michael P McRae
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Glennon Simmons
- Department of Biomaterials, New York University, New York, NY, USA
| | - John T McDevitt
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Biomaterials, New York University, New York, NY, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| |
Collapse
|
9
|
McRae MP, Simmons GW, Wong J, Shadfan B, Gopalkrishnan S, Christodoulides N, McDevitt JT. Programmable bio-nano-chip system: a flexible point-of-care platform for bioscience and clinical measurements. LAB ON A CHIP 2015; 15:4020-31. [PMID: 26308851 PMCID: PMC4589532 DOI: 10.1039/c5lc00636h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The development of integrated instrumentation for universal bioassay systems serves as a key goal for the lab-on-a-chip community. The programmable bio-nano-chip (p-BNC) system is a versatile multiplexed and multiclass chemical- and bio-sensing system for bioscience and clinical measurements. The system is comprised of two main components, a disposable cartridge and a portable analyzer. The customizable single-use plastic cartridges, which now can be manufactured in high volumes using injection molding, are designed for analytical performance, ease of use, reproducibility, and low cost. These labcard devices implement high surface area nano-structured biomarker capture elements that enable high performance signaling and are index-matched to real-world biological specimens. This detection modality, along with the convenience of on-chip fluid storage in blisters and self-contained waste, represents a standard process to digitize biological signatures at the point-of-care. A companion portable analyzer prototype has been developed to integrate fluid motivation, optical detection, and automated data analysis, and it serves as the human interface for complete assay automation. In this report, we provide a systems-level perspective of the p-BNC universal biosensing platform with an emphasis on flow control, device integration, and automation. To demonstrate the flexibility of the p-BNC, we distinguish diseased and non-case patients across three significant disease applications: prostate cancer, ovarian cancer, and acute myocardial infarction. Progress towards developing a rapid 7 minute myoglobin assay is presented using the fully automated p-BNC system.
Collapse
Affiliation(s)
| | - Glennon. W. Simmons
- Department of Bioengineering, Rice University, Houston, TX, U.S.A
- Department of Chemistry, Rice University, Houston, TX, U.S.A
| | - Jorge Wong
- Department of Bioengineering, Rice University, Houston, TX, U.S.A
- Department of Chemistry, Rice University, Houston, TX, U.S.A
| | - Basil Shadfan
- Department of Chemistry, Rice University, Houston, TX, U.S.A
| | | | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, Houston, TX, U.S.A
- Department of Chemistry, Rice University, Houston, TX, U.S.A
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, U.S.A
| | - John T. McDevitt
- Department of Bioengineering, Rice University, Houston, TX, U.S.A
- Department of Chemistry, Rice University, Houston, TX, U.S.A
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, U.S.A
| |
Collapse
|
10
|
Omar E. Future Imaging Alternatives: The Clinical Non-invasive Modalities in Diagnosis of Oral Squamous Cell Carcinoma (OSCC). Open Dent J 2015; 9:311-8. [PMID: 26464601 PMCID: PMC4598385 DOI: 10.2174/1874210601509010311] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 12/15/2014] [Accepted: 05/25/2015] [Indexed: 01/08/2023] Open
Abstract
Background : Oral squamous cell carcinoma (OSCC) has a remarkably high incidence worldwide, and a fairly serious prognosis. This is encouraging further research into advanced technologies for non-invasive methods of making early diagnoses, ideally in primary care settings. Method : In this article, the available objective Non-imaging methods for diagnosing OSCC have been reviewed. MEDLINE, EMBASE, the Cochrane Library, and CINAHL have been searched for advanced technologies of non-invasive methods in diagnosis of OSCC, including oral brush biopsy, optical biopsy, saliva-based oral cancer diagnosis and others. Results : Toluidine blue, one of the oldest non-invasive methods for diagnosing OSCC, is unreliable because of its subjectivity, as it is dependent on the experience of the examiner. The diagnosis of Oral carcinoma by Oral brush biopsy with exfoliative cytology based on nano-bio-chip sensor platform shows 97–100% sensitivity and 86% specificity. Another promising non-invasive technique for OSCC diagnosis is saliva-based oral cancer diagnosis, which is an alternative to serum testing. Optical biopsy, which uses the technology of spectroscopy, can be used to detect changes at a sub-cellular level; thus, it provides information that may not be available with conventional histology with reliable sensitivity and specificity. Conclusion : It is clearly evident that screening and early effective detection of cancer and pre-cancerous lesions have the potential to reduce the morbidity and mortality of this disease. The imaging technologies are subjective procedures since all of them require interpretation and significantly affected by the examiner experience. These make further research for advanced objective procedures. Saliva-based oral cancer diagnosis and optical biopsy are promising objective non-invasive methods for diagnosing OSCC. They are easy to perform clinically at primary care set. They show promising pathways for future development of more effective method for the diagnosis of OSCC.
Collapse
Affiliation(s)
- Esam Omar
- Department of Oral & Maxillofacial Surgery, College of Dentistry, Taibah University, Saudi Arabia
| |
Collapse
|
11
|
Prieto SP, Powless AJ, Boice JW, Sharma SG, Muldoon TJ. Proflavine Hemisulfate as a Fluorescent Contrast Agent for Point-of-Care Cytology. PLoS One 2015; 10:e0125598. [PMID: 25962131 PMCID: PMC4427403 DOI: 10.1371/journal.pone.0125598] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 03/24/2015] [Indexed: 11/19/2022] Open
Abstract
Proflavine hemisulfate, an acridine-derived fluorescent dye, can be used as a rapid stain for cytologic examination of biological specimens. Proflavine fluorescently stains cell nuclei and cytoplasmic structures, owing to its small amphipathic structure and ability to intercalate DNA. In this manuscript, we demonstrated the use of proflavine as a rapid cytologic dye on a number of specimens, including normal exfoliated oral squamous cells, cultured human oral squamous carcinoma cells, and leukocytes derived from whole blood specimens using a custom-built, portable, LED-illuminated fluorescence microscope. No incubation time was needed after suspending cells in 0.01% (w/v) proflavine diluted in saline. Images of proflavine stained oral cells had clearly visible nuclei as well as granular cytoplasm, while stained leukocytes exhibited bright nuclei, and highlighted the multilobar nature of nuclei in neutrophils. We also demonstrated the utility of quantitative analysis of digital images of proflavine stained cells, which can be used to detect significant morphological differences between different cell types. Proflavine stained oral cells have well-defined nuclei and cell membranes which allowed for quantitative analysis of nuclear to cytoplasmic ratios, as well as image texture analysis to extract quantitative image features.
Collapse
Affiliation(s)
- Sandra P. Prieto
- Biomedical Engineering Department, University of Arkansas, Fayetteville, Arkansas 72701, United States of America
| | - Amy J. Powless
- Biomedical Engineering Department, University of Arkansas, Fayetteville, Arkansas 72701, United States of America
| | - Jackson W. Boice
- Biomedical Engineering Department, University of Arkansas, Fayetteville, Arkansas 72701, United States of America
| | - Shree G. Sharma
- 10810 Executive Center Dr., Nephropath Ste. 100, Little Rock, Arkansas 72211, United States of America
| | - Timothy J. Muldoon
- Biomedical Engineering Department, University of Arkansas, Fayetteville, Arkansas 72701, United States of America
| |
Collapse
|
12
|
McDevitt JT, McRae MP, Simmons GW, Christodoulides N. Programmable bio-nano-chip system: a flexible diagnostic platform that learns. JOURNAL OF BIOSENSORS & BIOELECTRONICS 2015; 6:e137. [PMID: 30918744 PMCID: PMC6432931 DOI: 10.4172/2155-6210.1000e137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- John T McDevitt
- Department of Biomaterials, New York University College of Dentistry, New York, NY, USA
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Michael P McRae
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Glennon W Simmons
- Department of Biomaterials, New York University College of Dentistry, New York, NY, USA
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, Houston, TX, USA
- Department of Chemistry, Rice University, Houston, TX, USA
| |
Collapse
|
13
|
Omar E. Current concepts and future of noninvasive procedures for diagnosing oral squamous cell carcinoma--a systematic review. Head Face Med 2015; 11:6. [PMID: 25889859 PMCID: PMC4396078 DOI: 10.1186/s13005-015-0063-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 02/04/2015] [Indexed: 12/21/2022] Open
Abstract
Background Oral squamous cell carcinoma (OSCC) has a remarkably high incidence worldwide, and a fairly serious prognosis, encouraging further research into advanced technologies for noninvasive methods of making early diagnoses, ideally in primary care settings. Objectives Our purpose was to examine the validity of using advanced noninvasive technologies in diagnosis of OSCC by identifying and evaluating relevant published reports. Data source MEDLINE, EMBASE, and CINAHL were searched to identify clinical trials and other information published between 1990 and 10 June 2014; the searches of MEDLINE and EMBASE were updated to November 2014. Study selection: Studies of noninvasive methods of diagnosing OSCC, including oral brush biopsy, optical biopsy, saliva-based oral cancer diagnosis, and others were included. Data extraction Data were abstracted and evaluated in duplicate for possible relevance on two occasions at an interval of 2 months before being included or excluded. Data synthesis This study identified 163 studies of noninvasive methods for diagnosing OSCC that met the inclusion criteria. These included six studies of oral brush biopsy, 42 of saliva-based oral diagnosis, and 115 of optical biopsy. Sixty nine of these studies were assessed by the modified version of the QUADAS instrument. Saliva-based oral cancer diagnosis and optical biopsy were found to be promising noninvasive methods for diagnosing OSCC. Limitation The strength of evidence was rated low for accuracy outcomes because the studies did not report important details required to assess the risk for bias. Conclusions It is clear that screening for and early detection of cancer and pre-cancerous lesions have the potential to reduce the morbidity and mortality of this disease. Advances in technologies for saliva-based oral diagnosis and optical biopsy are promising pathways for the future development of more effective noninvasive methods for diagnosing OSCC that are easy to perform clinically in primary care settings.
Collapse
Affiliation(s)
- Esam Omar
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Taibah University, Madinah, Saudi Arabia.
| |
Collapse
|
14
|
Sanavio B, Krol S. On the Slow Diffusion of Point-of-Care Systems in Therapeutic Drug Monitoring. Front Bioeng Biotechnol 2015; 3:20. [PMID: 25767794 PMCID: PMC4341557 DOI: 10.3389/fbioe.2015.00020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 02/09/2015] [Indexed: 12/22/2022] Open
Abstract
Recent advancements in point-of-care (PoC) technologies show great transformative promises for personalized preventative and predictive medicine. However, fields like therapeutic drug monitoring (TDM), that first allowed for personalized treatment of patients' disease, still lag behind in the widespread application of PoC devices for monitoring of patients. Surprisingly, very few applications in commonly monitored drugs, such as anti-epileptics, are paving the way for a PoC approach to patient therapy monitoring compared to other fields like intensive care cardiac markers monitoring, glycemic controls in diabetes, or bench-top hematological parameters analysis at the local drug store. Such delay in the development of portable fast clinically effective drug monitoring devices is in our opinion due more to an inertial drag on the pervasiveness of these new devices into the clinical field than a lack of technical capability. At the same time, some very promising technologies failed in the clinical practice for inadequate understanding of the outcome parameters necessary for a relevant technological breakthrough that has superior clinical performance. We hope, by over-viewing both TDM practice and its yet unmet needs and latest advancement in micro- and nanotechnology applications to PoC clinical devices, to help bridging the two communities, the one exploiting analytical technologies and the one mastering the most advanced techniques, into translating existing and forthcoming technologies in effective devices.
Collapse
Affiliation(s)
- Barbara Sanavio
- IRCCS Fondazione Istituto Neurologico Carlo Besta, Milan, Italy
| | - Silke Krol
- IRCCS Fondazione Istituto Neurologico Carlo Besta, Milan, Italy
| |
Collapse
|
15
|
Ng AHC, Lee M, Choi K, Fischer AT, Robinson JM, Wheeler AR. Digital microfluidic platform for the detection of rubella infection and immunity: a proof of concept. Clin Chem 2014; 61:420-9. [PMID: 25512641 DOI: 10.1373/clinchem.2014.232181] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Whereas disease surveillance for infectious diseases such as rubella is important, it is critical to identify pregnant women at risk of passing rubella to their offspring, which can be fatal and can result in congenital rubella syndrome (CRS). The traditional centralized model for diagnosing rubella is cost-prohibitive in resource-limited settings, representing a major obstacle to the prevention of CRS. As a step toward decentralized diagnostic systems, we developed a proof-of-concept digital microfluidic (DMF) diagnostic platform that possesses the flexibility and performance of automated immunoassay platforms used in central facilities, but with a form factor the size of a shoebox. METHODS DMF immunoassays were developed with integrated sample preparation for the detection of rubella virus (RV) IgG and IgM. The performance (sensitivity and specificity) of the assays was evaluated with serum and plasma samples from a commercial antirubella mixed-titer performance panel. RESULTS The new platform performed the essential processing steps, including sample aliquoting for 4 parallel assays, sample dilution, and IgG blocking. Testing of performance panel samples yielded diagnostic sensitivity and specificity of 100% and 100% for both RV IgG and RV IgM. With 1.8 μL sample per assay, 4 parallel assays were performed in approximately 30 min with <10% mean CV. CONCLUSIONS This proof of concept establishes DMF-powered immunoassays as being potentially useful for the diagnosis of infectious disease.
Collapse
Affiliation(s)
- Alphonsus H C Ng
- Institute of Biomaterials and Biomedical Engineering, Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada
| | - Misan Lee
- Innis College, and Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada
| | - Kihwan Choi
- Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada; Department of Chemistry, University of Toronto, Toronto, ON, Canada
| | | | | | - Aaron R Wheeler
- Institute of Biomaterials and Biomedical Engineering, Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada; Department of Chemistry, University of Toronto, Toronto, ON, Canada;
| |
Collapse
|
16
|
Coskun AF, Cetin AE, Galarreta BC, Alvarez DA, Altug H, Ozcan A. Lensfree optofluidic plasmonic sensor for real-time and label-free monitoring of molecular binding events over a wide field-of-view. Sci Rep 2014; 4:6789. [PMID: 25346102 DOI: 10.1038/lsa.2014.3] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 08/21/2013] [Accepted: 10/06/2014] [Indexed: 05/28/2023] Open
Abstract
We demonstrate a high-throughput biosensing device that utilizes microfluidics based plasmonic microarrays incorporated with dual-color on-chip imaging toward real-time and label-free monitoring of biomolecular interactions over a wide field-of-view of >20 mm(2). Weighing 40 grams with 8.8 cm in height, this biosensor utilizes an opto-electronic imager chip to record the diffraction patterns of plasmonic nanoapertures embedded within microfluidic channels, enabling real-time analyte exchange. This plasmonic chip is simultaneously illuminated by two different light-emitting-diodes that are spectrally located at the right and left sides of the plasmonic resonance mode, yielding two different diffraction patterns for each nanoaperture array. Refractive index changes of the medium surrounding the near-field of the nanostructures, e.g., due to molecular binding events, induce a frequency shift in the plasmonic modes of the nanoaperture array, causing a signal enhancement in one of the diffraction patterns while suppressing the other. Based on ratiometric analysis of these diffraction images acquired at the detector-array, we demonstrate the proof-of-concept of this biosensor by monitoring in real-time biomolecular interactions of protein A/G with immunoglobulin G (IgG) antibody. For high-throughput on-chip fabrication of these biosensors, we also introduce a deep ultra-violet lithography technique to simultaneously pattern thousands of plasmonic arrays in a cost-effective manner.
Collapse
Affiliation(s)
- Ahmet F Coskun
- 1] Departments of Electrical Engineering and Bioengineering, University of California, Los Angeles (UCLA), CA 90095, USA [2] Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125
| | - Arif E Cetin
- 1] Department of Electrical and Computer Engineering, Boston University, MA 02215, USA [2] Bioengineering Department, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne CH-1015 Switzerland
| | - Betty C Galarreta
- 1] Department of Electrical and Computer Engineering, Boston University, MA 02215, USA [2] Pontificia Universidad Catolica del Peru, Departamento de Ciencias-Quimica, Avenida Universitaria 1801, Lima 32, Peru
| | | | - Hatice Altug
- 1] Department of Electrical and Computer Engineering, Boston University, MA 02215, USA [2] Bioengineering Department, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne CH-1015 Switzerland
| | - Aydogan Ozcan
- 1] Departments of Electrical Engineering and Bioengineering, University of California, Los Angeles (UCLA), CA 90095, USA [2] California NanoSystems Institute, University of California, Los Angeles (UCLA), CA 90095, USA
| |
Collapse
|
17
|
Rödiger S, Liebsch C, Schmidt C, Lehmann W, Resch-Genger U, Schedler U, Schierack P. Nucleic acid detection based on the use of microbeads: a review. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1243-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Zhang W, Chen Y, Shao Y, Fan LJ. Facile preparation of polydiacetylene-based uniform porous fluorescent microspheres for potential immunoassay applications. J Mater Chem B 2014; 2:5249-5255. [DOI: 10.1039/c4tb00561a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescent microspheres are prepared by loading PDA onto the substrate microspheresviaa self-assembled vesicle precursor pathway.
Collapse
Affiliation(s)
- Wei Zhang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Yun Chen
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Ya Shao
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Li-Juan Fan
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| |
Collapse
|
19
|
Chaudhary A, Gupta A, Khan S, Nandi CK. Morphological effect of gold nanoparticles on the adsorption of bovine serum albumin. Phys Chem Chem Phys 2014; 16:20471-82. [DOI: 10.1039/c4cp01515k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The role of morphology and surface chemistry of gold nanoparticles in the adsorption of bovine serum albumin.
Collapse
Affiliation(s)
- Abhishek Chaudhary
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Himachal Pradesh, India-175001
| | - Abhishek Gupta
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Himachal Pradesh, India-175001
| | - Syamantak Khan
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Himachal Pradesh, India-175001
| | - Chayan Kanti Nandi
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Himachal Pradesh, India-175001
| |
Collapse
|
20
|
Castro-Puyana M, Mendiola JA, Ibañez E. Strategies for a cleaner new scientific discipline of green foodomics. Trends Analyt Chem 2013. [DOI: 10.1016/j.trac.2013.06.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
21
|
A prospective overview of the essential requirements in molecular modeling for nanomedicine design. Future Med Chem 2013; 5:929-46. [PMID: 23682569 DOI: 10.4155/fmc.13.67] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nanotechnology has presented many new challenges and opportunities in the area of nanomedicine design. The issues related to nanoconjugation, nanosystem-mediated targeted drug delivery, transitional stability of nanovehicles, the integrity of drug transport, drug-delivery mechanisms and chemical structural design require a pre-estimated and determined course of assumptive actions with property and characteristic estimations for optimal nanomedicine design. Molecular modeling in nanomedicine encompasses these pre-estimations and predictions of pertinent design data via interactive computographic software. Recently, an increasing amount of research has been reported where specialized software is being developed and employed in an attempt to bridge the gap between drug discovery, materials science and biology. This review provides an assimilative and concise incursion into the current and future strategies of molecular-modeling applications in nanomedicine design and aims to describe the utilization of molecular models and theoretical-chemistry computographic techniques for expansive nanomedicine design and development.
Collapse
|
22
|
Navruz I, Coskun AF, Wong J, Mohammad S, Tseng D, Nagi R, Phillips S, Ozcan A. Smart-phone based computational microscopy using multi-frame contact imaging on a fiber-optic array. LAB ON A CHIP 2013; 13:4015-23. [PMID: 23939637 PMCID: PMC3804724 DOI: 10.1039/c3lc50589h] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We demonstrate a cellphone based contact microscopy platform, termed Contact Scope, which can image highly dense or connected samples in transmission mode. Weighing approximately 76 grams, this portable and compact microscope is installed on the existing camera unit of a cellphone using an opto-mechanical add-on, where planar samples of interest are placed in contact with the top facet of a tapered fiber-optic array. This glass-based tapered fiber array has ~9 fold higher density of fiber optic cables on its top facet compared to the bottom one and is illuminated by an incoherent light source, e.g., a simple light-emitting-diode (LED). The transmitted light pattern through the object is then sampled by this array of fiber optic cables, delivering a transmission image of the sample onto the other side of the taper, with ~3× magnification in each direction. This magnified image of the object, located at the bottom facet of the fiber array, is then projected onto the CMOS image sensor of the cellphone using two lenses. While keeping the sample and the cellphone camera at a fixed position, the fiber-optic array is then manually rotated with discrete angular increments of e.g., 1-2 degrees. At each angular position of the fiber-optic array, contact images are captured using the cellphone camera, creating a sequence of transmission images for the same sample. These multi-frame images are digitally fused together based on a shift-and-add algorithm through a custom-developed Android application running on the smart-phone, providing the final microscopic image of the sample, visualized through the screen of the phone. This final computation step improves the resolution and also removes spatial artefacts that arise due to non-uniform sampling of the transmission intensity at the fiber optic array surface. We validated the performance of this cellphone based Contact Scope by imaging resolution test charts and blood smears.
Collapse
Affiliation(s)
- Isa Navruz
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Zhu H, Isikman SO, Mudanyali O, Greenbaum A, Ozcan A. Optical imaging techniques for point-of-care diagnostics. LAB ON A CHIP 2013; 13:51-67. [PMID: 23044793 PMCID: PMC3510351 DOI: 10.1039/c2lc40864c] [Citation(s) in RCA: 198] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Improving access to effective and affordable healthcare has long been a global endeavor. In this quest, the development of cost-effective and easy-to-use medical testing equipment that enables rapid and accurate diagnosis is essential to reduce the time and costs associated with healthcare services. To this end, point-of-care (POC) diagnostics plays a crucial role in healthcare delivery in both developed and developing countries by bringing medical testing to patients, or to sites near patients. As the diagnosis of a wide range of diseases, including various types of cancers and many endemics, relies on optical techniques, numerous compact and cost-effective optical imaging platforms have been developed in recent years for use at the POC. Here, we review the state-of-the-art optical imaging techniques that can have a significant impact on global health by facilitating effective and affordable POC diagnostics.
Collapse
Affiliation(s)
- Hongying Zhu
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA
| | - Serhan O. Isikman
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA
| | - Onur Mudanyali
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA
| | - Alon Greenbaum
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA
| | - Aydogan Ozcan
- Electrical Engineering Department, University of California, Los Angeles, CA 90095, USA
- Bioengineering Department, University of California, Los Angeles, CA, 90095, USA
- California NanoSystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA
| |
Collapse
|
24
|
Chou J, Wong J, Christodoulides N, Floriano PN, Sanchez X, McDevitt J. Porous bead-based diagnostic platforms: bridging the gaps in healthcare. SENSORS (BASEL, SWITZERLAND) 2012; 12:15467-99. [PMID: 23202219 PMCID: PMC3522972 DOI: 10.3390/s121115467] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 10/25/2012] [Accepted: 11/01/2012] [Indexed: 01/11/2023]
Abstract
Advances in lab-on-a-chip systems have strong potential for multiplexed detection of a wide range of analytes with reduced sample and reagent volume; lower costs and shorter analysis times. The completion of high-fidelity multiplexed and multiclass assays remains a challenge for the medical microdevice field; as it struggles to achieve and expand upon at the point-of-care the quality of results that are achieved now routinely in remote laboratory settings. This review article serves to explore for the first time the key intersection of multiplexed bead-based detection systems with integrated microfluidic structures alongside porous capture elements together with biomarker validation studies. These strategically important elements are evaluated here in the context of platform generation as suitable for near-patient testing. Essential issues related to the scalability of these modular sensor ensembles are explored as are attempts to move such multiplexed and multiclass platforms into large-scale clinical trials. Recent efforts in these bead sensors have shown advantages over planar microarrays in terms of their capacity to generate multiplexed test results with shorter analysis times. Through high surface-to-volume ratios and encoding capabilities; porous bead-based ensembles; when combined with microfluidic elements; allow for high-throughput testing for enzymatic assays; general chemistries; protein; antibody and oligonucleotide applications.
Collapse
Affiliation(s)
- Jie Chou
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
| | - Jorge Wong
- Department of Chemistry, University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA; E-Mail:
| | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Pierre N. Floriano
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Ximena Sanchez
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - John McDevitt
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| |
Collapse
|
25
|
Raamanathan A, Simmons GW, Christodoulides N, Floriano PN, Furmaga WB, Redding SW, Lu KH, Bast RC, McDevitt JT. Programmable bio-nano-chip systems for serum CA125 quantification: toward ovarian cancer diagnostics at the point-of-care. Cancer Prev Res (Phila) 2012; 5:706-16. [PMID: 22490510 DOI: 10.1158/1940-6207.capr-11-0508] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Point-of-care (POC) implementation of early detection and screening methodologies for ovarian cancer may enable improved survival rates through early intervention. Current laboratory-confined immunoanalyzers have long turnaround times and are often incompatible with multiplexing and POC implementation. Rapid, sensitive, and multiplexable POC diagnostic platforms compatible with promising early detection approaches for ovarian cancer are needed. To this end, we report the adaptation of the programmable bio-nano-chip (p-BNC), an integrated, microfluidic, and modular (programmable) platform for CA125 serum quantitation, a biomarker prominently implicated in multimodal and multimarker screening approaches. In the p-BNCs, CA125 from diseased sera (Bio) is sequestered and assessed with a fluorescence-based sandwich immunoassay, completed in the nano-nets (Nano) of sensitized agarose microbeads localized in individually addressable wells (Chip), housed in a microfluidic module, capable of integrating multiple sample, reagent and biowaste processing, and handling steps. Antibody pairs that bind to distinct epitopes on CA125 were screened. To permit efficient biomarker sequestration in a three-dimensional microfluidic environment, the p-BNC operating variables (incubation times, flow rates, and reagent concentrations) were tuned to deliver optimal analytical performance under 45 minutes. With short analysis times, competitive analytical performance (inter- and intra-assay precision of 1.2% and 1.9% and limit of detection of 1.0 U/mL) was achieved on this minisensor ensemble. Furthermore, validation with sera of patients with ovarian cancer (n = 20) showed excellent correlation (R(2) = 0.97) with gold-standard ELISA. Building on the integration capabilities of novel microfluidic systems programmed for ovarian cancer, the rapid, precise, and sensitive miniaturized p-BNC system shows strong promise for ovarian cancer diagnostics.
Collapse
Affiliation(s)
- Archana Raamanathan
- Departments of Bioengineering and Chemistry, Rice University, Houston, TX 77005, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Shrivastava S, Nuffer JH, Siegel RW, Dordick JS. Position-specific chemical modification and quantitative proteomics disclose protein orientation adsorbed on silica nanoparticles. NANO LETTERS 2012; 12:1583-7. [PMID: 22296027 DOI: 10.1021/nl2044524] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We describe a method for determining the orientation of cytochrome c, RNase A, and lysozyme on silica nanoparticles (SNPs) using chemical modification combined with proteolysis-mass spectrometry. The proteins interacted with SNPs through preferential adsorption sites, which are dependent on SNP diameter; 4 nm SNPs induce greater structural stabilization than 15 nm particles, presumably due to greater surface curvature of the former. These results suggest that nanoparticle size and protein structure influence protein orientation on SNPs.
Collapse
Affiliation(s)
- Siddhartha Shrivastava
- Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | | | | | | |
Collapse
|
27
|
Giannobile WV, McDevitt JT, Niedbala RS, Malamud D. Translational and clinical applications of salivary diagnostics. Adv Dent Res 2012; 23:375-80. [PMID: 21917748 DOI: 10.1177/0022034511420434] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
There have been significant advances in techniques for the detection of biomarker signals in the oral cavity (e.g., ELISAs for proteins, PCR for RNA and DNA) as well as the engineering and development of microfluidic approaches to make oral-based point-of-care (POC) methods for the diagnosis for both local and systemic conditions a reality. In this section, we focus on three such approaches, namely, periodontal disease management, early markers for systemic diseases, and salivary markers useful for pharmacogenomic studies. Novel approaches using non-invasive, salivary samples and user-friendly devices offer results that are as sensitive and specific as laboratory-based analyses using blood or urine.
Collapse
Affiliation(s)
- W V Giannobile
- Department of Periodontics, Michigan Center for Oral Health Research, University of Michigan School of Dentistry, Ann Arbor, USA
| | | | | | | |
Collapse
|
28
|
Jokerst JV, Chou J, Camp JP, Wong J, Lennart A, Pollard AA, Floriano PN, Christodoulides N, Simmons GW, Zhou Y, Ali MF, McDevitt JT. Location of biomarkers and reagents within agarose beads of a programmable bio-nano-chip. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:613-24. [PMID: 21290601 PMCID: PMC3397282 DOI: 10.1002/smll.201002089] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Indexed: 05/22/2023]
Abstract
The slow development of cost-effective medical microdevices with strong analytical performance characteristics is due to a lack of selective and efficient analyte capture and signaling. The recently developed programmable bio-nano-chip (PBNC) is a flexible detection device with analytical behavior rivaling established macroscopic methods. The PBNC system employs ≈300 μm-diameter bead sensors composed of agarose "nanonets" that populate a microelectromechanical support structure with integrated microfluidic elements. The beads are an efficient and selective protein-capture medium suitable for the analysis of complex fluid samples. Microscopy and computational studies probe the 3D interior of the beads. The relative contributions that the capture and detection of moieties, analyte size, and bead porosity make to signal distribution and intensity are reported. Agarose pore sizes ranging from 45 to 620 nm are examined and those near 140 nm provide optimal transport characteristics for rapid (<15 min) tests. The system exhibits efficient (99.5%) detection of bead-bound analyte along with low (≈2%) nonspecific immobilization of the detection probe for carcinoembryonic antigen assay. Furthermore, the role analyte dimensions play in signal distribution is explored, and enhanced methods for assay building that consider the unique features of biomarker size are offered.
Collapse
Affiliation(s)
- Jesse V. Jokerst
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Jie Chou
- Departments of Bioengineering and Chemistry, Rice University, 6500 Main Street, Houston, TX 77030, USA
| | - James P. Camp
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Jorge Wong
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Alexis Lennart
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Amanda A. Pollard
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Pierre N. Floriano
- Departments of Bioengineering and Chemistry, Rice University, 6500 Main Street, Houston, TX 77030, USA
| | - Nicolaos Christodoulides
- Departments of Bioengineering and Chemistry, Rice University, 6500 Main Street, Houston, TX 77030, USA
| | - Glennon W. Simmons
- Departments of Bioengineering and Chemistry, Rice University, 6500 Main Street, Houston, TX 77030, USA
| | - Yanjie Zhou
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - Mehnaaz F. Ali
- Departments of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
| | - John T. McDevitt
- Departments of Bioengineering and Chemistry, Rice University, 6500 Main Street, Houston, TX 77030, USA
| |
Collapse
|
29
|
Gurkan UA, Moon S, Geckil H, Xu F, Wang S, Lu TJ, Demirci U. Miniaturized lensless imaging systems for cell and microorganism visualization in point-of-care testing. Biotechnol J 2011; 6:138-49. [PMID: 21298800 PMCID: PMC3066565 DOI: 10.1002/biot.201000427] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Low-cost, robust, and user-friendly diagnostic capabilities at the point-of-care (POC) are critical for treating infectious diseases and preventing their spread in developing countries. Recent advances in micro- and nanoscale technologies have enabled the merger of optical and fluidic technologies (optofluidics) paving the way for cost-effective lensless imaging and diagnosis for POC testing in resource-limited settings. Applications of the emerging lensless imaging technologies include detecting and counting cells of interest, which allows rapid and affordable diagnostic decisions. This review presents the advances in lensless imaging and diagnostic systems, and their potential clinical applications in developing countries. The emerging technologies are reviewed from a POC perspective considering cost effectiveness, portability, sensitivity, throughput and ease of use for resource-limited settings.
Collapse
Affiliation(s)
- Umut Atakan Gurkan
- Demirci Bio-Acoustic MEMS in Medicine (BAMM) Labs at the HST-BWH Center for Bioengineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
Profiling of protein biomarkers is powerful for the analysis of complex proteomes altered during the progression of diseases. Lab-on-a-chip technologies can potentially provide the throughput and efficiency required for point-of-care and clinical applications. While initial studies utilized 1D microchip separation techniques, researchers have recently developed novel 2D microchip separation platforms with the ability to profile thousands of proteins more effectively. Despite advancements in lab-on-a-chip technologies, very few reports have demonstrated a point-of-care microchip-based profiling of proteins. In this review, recent progress in 1D and 2D microchip profiling of protein mixtures of a biological sample with potential point-of-care applications are discussed. A selection of recent microchip immunoassay-based techniques is also highlighted.
Collapse
|
31
|
Yeh CK, Christodoulides NJ, Floriano PN, Miller CS, Ebersole JL, Weigum SE, McDevitt J, Redding SW. Current development of saliva/oral fluid-based diagnostics. TEXAS DENTAL JOURNAL 2010; 127:651-61. [PMID: 20737986 PMCID: PMC3742318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Saliva can be easily obtained in medical and non-medical settings, and contains numerous bio-molecules, including those typically found in serum for disease detection and monitoring. In the past two decades, the achievements of high-throughput approaches afforded by biotechnology and nanotechnology allow for disease-specific salivary biomarker discovery and establishment of rapid, multiplex, and miniaturized analytical assays. These developments have dramatically advanced saliva-based diagnostics. In this review, we discuss the current consensus on development of saliva/oral fluid-based diagnostics and provide a summary of recent research advancements of the Texas-Kentucky Saliva Diagnostics Consortium. In the foreseeable future, current research on saliva based diagnostic methods could revolutionize health care.
Collapse
Affiliation(s)
- Chih-Ko Yeh
- Department of Dental Diagnostic Science, University of Texas Health Science Center at San Antonio, USA
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Quantitative proteomics reveals myosin and actin as promising saliva biomarkers for distinguishing pre-malignant and malignant oral lesions. PLoS One 2010; 5:e11148. [PMID: 20567502 PMCID: PMC2887353 DOI: 10.1371/journal.pone.0011148] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Accepted: 05/26/2010] [Indexed: 12/24/2022] Open
Abstract
Background Oral cancer survival rates increase significantly when it is detected and treated early. Unfortunately, clinicians now lack tests which easily and reliably distinguish pre-malignant oral lesions from those already transitioned to malignancy. A test for proteins, ones found in non-invasively-collected whole saliva and whose abundances distinguish these lesion types, would meet this critical need. Methodology/Principal Findings To discover such proteins, in a first-of-its-kind study we used advanced mass spectrometry-based quantitative proteomics analysis of the pooled soluble fraction of whole saliva from four subjects with pre-malignant lesions and four with malignant lesions. We prioritized candidate biomarkers via bioinformatics and validated selected proteins by western blotting. Bioinformatic analysis of differentially abundant proteins and initial western blotting revealed increased abundance of myosin and actin in patients with malignant lesions. We validated those results by additional western blotting of individual whole saliva samples from twelve other subjects with pre-malignant oral lesions and twelve with malignant oral lesions. Sensitivity/specificity values for distinguishing between different lesion types were 100%/75% (p = 0.002) for actin, and 67%/83% (p<0.00001) for myosin in soluble saliva. Exfoliated epithelial cells from subjects' saliva also showed increased myosin and actin abundance in those with malignant lesions, linking our observations in soluble saliva to abundance differences between pre-malignant and malignant cells. Conclusions/Significance Salivary actin and myosin abundances distinguish oral lesion types with sensitivity and specificity rivaling other non-invasive oral cancer tests. Our findings provide a promising starting point for the development of non-invasive and inexpensive salivary tests to reliably detect oral cancer early.
Collapse
|
33
|
Jokerst JV, Jacobson JW, Bhagwandin BD, Floriano PN, Christodoulides N, McDevitt JT. Programmable nano-bio-chip sensors: analytical meets clinical. Anal Chem 2010; 82:1571-9. [PMID: 20128622 PMCID: PMC2853750 DOI: 10.1021/ac901743u] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There have been many recent advances in the nano-bio-chip analysis methodology with implications for a number of high-morbidity diseases including HIV, cancer, and heart disease. (To listen to a podcast about this article, please go to the Analytical Chemistry multimedia page at pubs.acs.org/page/ancham/audio/index.html .).
Collapse
|