Portable COVID-19 Multi-Antibody Assay
J-C Chiao (PhD Caltech 1996), Mary and Richard Templeton Centennial Chair professor, is with Electrical and Computer Engineering at Southern Methodist University (SMU). My expertise is in bioelectronics for implants and wearables, biochemical sensors and microfluidic cancer metastasis assays. I have received 15 awarded and 9 pending patents related to medical devices with three licensed; and the 2011 TAMEST O'Donnell Award in Engineering.
Together with my teammate Dr. Ali Beskok (PhD Princeton, 1996), Brown Foundation Professor of Engineering, at SMU’s Mechanical Engineering, we are focusing our research on rapid COVID-19 antibody detection. Ali’s expertise is on electrokinetics, microfluidics, nanotechnologies and sensors with point of care applications. He has over 11,600 citations with an h-index of 45.
We have 48 years’ combined research experience on the microsystems for biomedical applications. With students, our team works closely together on the microfluidic and sensor platforms for antibody and biomarker detection.
This project aims to develop a multiplexed microfluidic sensor platform named “MAIRC” to detect the COVID-19 human IgG, IgM, IgA immunoglobulins. MAIRC is based on electrical impedance detection, nanorod-surfaces and alternative current electrothermal (ACET) flow control for efficient antibody binding and sensing. The disposable microchip and miniaturized electronics can interface with a smart phone to display results and implement artificial intelligence algorithms making it a fast, portable point-of-care device that can be used anywhere in the world for large-population diagnosis. MAIRC will provide real-time accurate information about individual patients’ profiles of immunoglobulin antibodies in blood for personalized precision treatment, and a means for reliable public risk assessment to combat the current and upcoming pandemic crisis and minimize economic impacts. The COVID-19 pandemic is ravaging communities and crippling the world economy. Such a tool, which does not exist currently, can help controlling the spread of infection and create global impact.
Many nations have imposed “stay-at-home” orders for the public due to the COVID-19 pandemic. As the global death toll has surpassed 500,000, health officials are uncertain about when to lift these orders and how soon daily life can return to normal. An important aspect to make decisions depends on determining the spread of virus infection, which requires extensive and accurate testing of the population. For COVID-19 specific antibodies, detections of IgG, IgM and IgA are preferred to obtain a precise picture of one’s immune system against the virus, particularly for those with asymptomatic infections or receiving target therapies.
Furthermore, testing large portions of the population requires quantifiable, reliable, fast, and inexpensive diagnostic methods. Existing methods for multiplexed detection of antibodies are expensive and bulky laboratory equipment such as the enzyme-linked immunosorbent assay (ELISA). The lateral flow assay, developed for rapid responses to this pandemic, unfortunately exhibits low sensitivity and specificity due to the passive flow mechanism and simple signal transduction. They cannot test multiple antibodies using one sample either. Several studies show that they cannot be reliably used for determining the infection spread with high false negative rates. Thus, there are dire, global needs for a better diagnostic tool.
Our solution is an integrated assay module with a disposable microfluidic chip. Blood sample drops can be collected by the finger prick method with a lancet. Plasma is filtered by passive filtration into multiplexed microchannels where impedance sensors are functionalized with specific receptors. Then the microchip is inserted into an interface module in which electronics perform electrothermal flow control to direct target biomolecules onto the electrodes and detect impedance variations at a specific radio frequency continuously. The electrical impedance changes indicate the capture of target antibodies in the blood plasma. The module communicates via wireless signals (Bluetooth) with a smart phone where the signals for specific antibodies are analyzed and displayed. Each chip can detect three different COVID-19 immunoglobulin antibodies simultaneously. The platform implements artificial intelligence with machine learning algorithms for the detected signals through a wireless cloud database to enhance accuracy and reliability.
The microfluidic device is empowered with (1) alternative current electrothermal flows to enhance specificity of antibody binding; (2) electrode surfaces modified by patterned nanorods to increase sensitivity and dynamic ranges; and (3) multiplexed in-parallel channels to detect IgG, IgA, and IgM immunoglobulins antibodies concurrently with the same blood sample without additional processing steps.
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MAIRC System
This proposed system will impact everyone in every region of the world. It directly addresses the accuracy, sensitivity and practicality utility issues for the multi-antibody sensors direly needed in the current COVID-19 pandemic crisis. Due to the extremely contagious nature and unpredictable severity and fatality among people, we have witnessed globally the virus strike communities quietly and quickly devastating economy and normality. While the coronaviruses will exist and influence individuals for at least several years, the unrelenting threat to the global community will occur indefinitely due to possible virus strain mutation/variations and limited immunity lifetime, even after vaccines become available.
Our proposed point-of-care immunoassay with concurrent sensing of multiple antibodies and smart data-driven intelligence addresses these needs directly. The detection of IgG, IgM and IgA antibody profiles give precise indications of individuals’ immunity. Based on the inherited features demonstrated in our previous works, MAIRC will be an accurate, fast, scalable for mass production and inexpensive method that enables testing for the large population. The big data collected will advance our knowledge about the COVID-19 virus and the community immunity. These evidences are critically necessary to make informed decisions to resume societal and economic activities.
- Elevating opportunities for all people, especially those who are traditionally left behind
Novel viruses will be an ongoing threat to human health until new vaccines are developed, as the current pandemic shows. MAIRC is reconfigurable and suitable to detect multiple specific antibodies from blood quickly, accurately and cost-effectively for any contagious pathogens such as viruses, bacteria and parasites. Thus, this solution is not a bandage to the current disaster but an enabler to empower us to be resilient against crisis. Owing to the system architectures in our designs, the microfluidic chips can be made like ICs with low-cost semiconductor fabrication. Thus, MAIRC is a sustainable solution with replicable, quick-responsive and scalable features.
Our team has been actively working on the microfluidic sensor platforms to detect antibodies of pathogens in fluid targeting contagious bacterium (Tuberculosis) and parasite (Malaria) infections in sub-Saharan Africa regions. Besides the graduate students under our supervision conducting the research on scientific aspects, the work has been complemented by a year-long undergraduate research project, conducted by 2 engineering and 2 Health/Society major female students, supported by SMU’s Hunt Institute of Engineering and Humanity’s Global Development Lab. When the COVID-19 outbreak occurred, our team studied the shortcomings of current sensor tools and realized that a better diagnostic system is needed to effectively battle the pandemic crisis. So we steered the research objectives onto the detection of key COVID-19 antibodies. Investigators Beskok and Chiao study literatures and have many meetings to mold the research targeting the most impactful goals, and conduct consultation discussions with Drs. Csaky (SMU), Li (Texas Hospital Association) and Hendler (UT Southwestern Medical Center) to ensure the aims addressing the core issues in the contagious epidemic and the solutions being sustainable and applicable. Our team is built on the shared passion that we can contribute our scientific and engineering expertise to help our global community fighting the pandemic.
Teaming with Dr. Beskok, I have a long history working on engineering research to address medical problems. The team’s passion is built on our personal experiences of dealing with health issues and empathic involvements with clinicians and patients when we conduct our research on clinical applications. We have been working on research projects for chronic pain, scoliosis spine correction and heart surgeries for children, Parkinson’s diseases, metastatic prostate cancers, gastroesophageal reflux disease and gastroparesis with close collaboration with hospitals. Knowing that we can look at these tough illnesses with a different and new perspective from the conventional medical angle, and contribute our multidisciplinary engineering knowledge to construct greater solutions for diagnosis, treatment or therapy, is not just a rewarding feeling for our research but also a sense of life purpose. We are passionate about assisting healthcare outcomes and giving patients a better quality of life. Being cognitively and compassionately empathic, we feel called to action by the heartbreaking stories of millions suffering from the pandemic crisis. We have steered our research toward solving the grand challenge to stop the spreading of COVID-19. We believe an affordable, convenient, accurate and sustainable solution like our system can benefit the whole world.
I have received 15 awarded and 9 pending patents related to medical devices. 3 of them are licensed. I am the recipient of the 2011 TAMEST O'Donnell Award in Engineering nominated by Nobel Laureates and National Academies’ fellows who reside in Texas; and 2012 Heroes of Healthcare, Research in Medicine Milestone award.
Teaming with Professor Beskok, we are inseparable partners having complementary research experience and skills on the microsystems for medical applications. Beskok’s research scopes include fluid mechanics, nanotechnology, bio-microfluidics, and numerical methods. He has publications with over 11,600 citations and holds 2 awarded and 2 pending patents. He has served as the Mechanical Engineering department chair for six years.
Both of us have produced numerous PhD/MS students and mentored postdoctoral and undergraduate students from many sponsored research projects.
Our team of professors and research students is guided by Dr. Eva Csaky, PhD, at the Hunt Institute for Engineering & Humanity, supporting the research with valuable data on the global community sociological and economical effects. Dr. Bob Hendler, MD, Chief Medical Officer at Texas Hospital Association, who was part of the team establishing the SARS disaster response plans for Texas and the Southern Region, is consulting our team to address the critical challenges and information needed on assessment of contagion spread. Our team is working closely with Dr. Quan-Zhen Li, MD, PhD, Director at Genomics & Microarray Core Facility, UT Southwestern Medical Center where rigorous characterization protocols for biomarkers and antibodies have been developed.
As researchers, we face technical issues and solve problems on a daily basis. Based on our combined 48 years of research and mentoring experience, we have developed methodologies to trace check-points, analyze failure phenomena and recommend alternative solutions to try when we encounter technical hurdles. All the critical core elements in the proposed MAIRC system have been previously demonstrated, so we are confident that there will be no unsolvable obstacle in the future. One of many examples of overcoming adversity involves our gastroesophageal reflex disease sensor development. Originally, doctors wanted us to make a visual camera implanted in the esophagus to monitor reflux. However, we realized it is impossible to continuously power such a camera. After digging into the disease’s diagnosis method, we developed a dual pH and impedance sensor implant instead. The implant not only can precisely detect reflux episodes, better than a camera, but can operate wirelessly without battery. The electrical device can be made on flexible substrates so it is comfortable to be implanted in the body for a long time. The concept later developed a ground-breaking deformable batteryless, wireless gastro-stimulator that can be implanted between the stomach wall layers and help patients to restore stomach motility.
Both investigators, Beskok and Chiao have held leadership positions in universities and technical societies. Both lead their individual research groups for more than 20 years. Beskok was a department chair and dramatically increased the department’s research and education programs. Chiao was a product line manager and senior technology advisor in a start-up company before joining academia. The company grew from 15 to 870 employees in 2.5 years and raised $225M funding. He is the Editor-in-chief of IEEE J-ERM journal and has been the general chair of IEEE International Microwave Biomedical Conference and Technical Program Chair for several international conferences such as IEEE IWS and SPIE symposia. Chiao has given 188 invited speeches advocating to engineers and general public the benefits of engineering research for clinical applications. In three events, audiences broke into tears when they shared their families’ agony from chronic pain as Chiao described his neurostimulator research for pain management and personal experience. His works have been covered by national and international media more than 700 times including television evening news, newspapers, radio, magazines and blogs such as National Geography magazine, CBS Henry Ford Innovation Nation television program, Washington Post, Wired magazine and NPR radio program.
- Nonprofit

Mary and Richard Templeton Centennial Chair