Dr. Kara Lynch is an Associate Professor of Laboratory Medicine at the University of California San Francisco, Co-Director of the Core Laboratory at Zuckerberg San Francisco General Hospital and Chemistry Director at UCSF Benioff Children’s Hospital Oakland. She is the co-director of the COMACC-accredited Clinical Chemistry Fellowship Program at UCSF. Her laboratory conducts studies aimed at identifying and quantifying endogenous and exogenous small molecules in biological specimens using novel diagnostic technologies, such as high resolution mass spectrometry, ion mobility mass spectrometry, ambient ionization mass spectrometry and thin-film interferometry. Her lab is involved in translational research studies evaluating the clinical utility of novel biomarkers or biomarker panels to diagnosis, treat and monitor disease. The methods developed in her laboratory are used to investigate perturbations in metabolic pathways caused by disease and drug use and translate the results into information that can be used in clinical practice.

Immunoassay urine drug screening has been the mainstay for the detection of drug exposure in patients for decades despite many limitations this approach presents. Positive samples are batched for confirmatory testing by LC-MS/MS targeted methods. Testing is limited to one matrix, a limited list of drugs/metabolites, and manual batch testing restricting interpretation, window of detection and timeliness of results to impact patient care. Utilization of alternative matrices, such as breath and oral fluid, is emerging for specific toxicological questions. Alternative analytical approaches, such as broad-spectrum drug testing with high resolution mass spectrometry, direct-to-mass spec testing with ambient ionization, and ion mobility mass spectrometry have the potential to change the landscape of drug testing in clinical laboratories. This talk will discuss alternative matrices and novel mass spectrometry-based approaches for drug detection.

The general topic of interest in our research group is the study of the mechanisms involved in photooxidative damage to biological systems, particularly in the human eye. Photooxidative damage is implicated in a number of ocular disorders such as age‐related cataract formation and age‐related macular degeneration (AMD; the leading cause of blindness in older adults). Light damage to biological systems may not manifest itself on a macroscopic level for decades, but the damage is initiated by short‐lived, electronically excited species that participate in Type I or Type II oxidative chemistry. We use a wide variety of experimental methods to study these systems, including laser‐based time‐resolved spectroscopy. By determining the sequence of events that leads to tissue injury and identifying the reactive species along the reaction pathway, we may be able to develop methods to slow down or stop these processes.

In collaboration with Prajkta Chivte and Zane LaCasse

Currently, the “gold standard” for Covid-19 diagnostic testing utilizes RT-PCR to detect the viral nucleic acid. This method is highly specific for selected viral genes and, with recent advances in methodology, saliva testing instead of nasopharyngeal swab sample collection is becoming more widely available. However, due to the global use of PCR testing, there are intermittent shortages of the necessary reagents and the average turnaround times for results are approximately two days. In collaboration with MAP sciences and ChemQuant Analytical Solutions, we are developing a new Covid-19 diagnostic test that utilizes MALDI ToF mass spectrometry to analyze protein profiles from human water gargle samples. Because the method detects all proteins in a sample, signatures from the viral proteins as well as the human immune response can be observed in a single measurement. In August 2020, we collected and analyzed ca. 550 samples from NIU’s student-athlete gateway testing program. This allowed us to develop the sample preparation method, data analysis and to compare the MALDI ToF results with PCR test results (Abbott RealTime). This population had a 14% positivity rate and 89% of the positive individuals were asymptomatic. At the end of Nov. 2020, we collected samples at a drive-thru testing program administered by the Illinois Department of Public Health. This population sampled a much wider range of ages and disease status and has allowed us to greatly refine the data analysis.

The new test is rapid and low cost and has a limit of detection comparable to the most widely available PCR tests. We have also recently established that the test has excellent specificity in that we are able to clearly distinguish SARS-2 from other viruses including four other coronaviruses (MERS, 229E, OC43 and NL63).

Our research integrates the role of new technologies, workflow and software for the analysis of molecules of biological interest. The overall goal is to develop innovative analytical tools and solutions that will benefit the detection and understanding of disease, and the discovery and development of appropriate therapeutics. All aspects of analytical sciences from sample collection to assay validation are considered in our research where mass spectrometric detection plays a central role. In addition to the application of separation sciences (GC, LC, SFC) combined to mass spectrometry, disruptive approaches based on MALDI or ion mobility for high throughput, multiplexed and low cost analyses of biomarkers and pharmaceuticals are investigated.

Our scientific interests include: separation sciences, sample preparation, automation, bioanalysis, metabolism, metabolomics, analytical proteomics, toxicology, high resolution mass spectrometry, ion mobility mass spectrometry, data independent acquisition techniques (SWATH), MS/MS spectra interpretation, ionization, data analysis and mass spectrometry imaging.

R. Graham Cooks is the Henry Bohn Hass Distinguished Professor in the Department of Chemistry at Purdue University. He has served as major professor to 140 PhD students. Dr. Cooks’ was a pioneer in the conception and implementation of tandem mass spectrometry (MS/MS) and of desorption ionization, especially molecular secondary ionization mass spectrometry (SIMS). In 2015 his lab performed exploratory analysis of small molecules in cerebrospinal fluid from which the MRM-profiling method emerged. His work also includes the development of miniature portable mass spectrometers using ambient ionization and application of this combination to problems of trace chemical analysis at point-of-care. His interests in the fundamentals of ion chemistry focus on chiral analysis based on the kinetics of cluster ion fragmentation. His group also studies collisions of ions at surfaces for new methods of molecular surface tailoring and analysis, and nanomaterials preparation by soft-landing of ions and charged droplets. Dr. Cooks also launched new method of preparative mass spectrometry based on accelerated reactions in microdroplets. Dr. Cooks has been recognized with the Mass Spectrometry and the Analytical Chemistry awards of the American Chemical Society, the Robert Boyle Medal and the Centennial Prize of the Royal Society of Chemistry, and the Camille & Henry Dreyfus Prize in the Chemical Sciences. He is an elected fellow of the American Academy of Arts and Sciences, the Academy of Inventors and the U.S. National Academy of Sciences.

Nicolás is a third year PhD student under the supervision of Prof. Graham Cooks at Purdue University. He earned two bachelor’s degrees, one in Chemistry (cum laude, 2017) and one in Industrial Engineering (summa cum laude, 2018), from the Universidad de los Andes (Bogotá, Colombia). Since joining the Cooks’ group his research has focused on several applications of ambient ionization mass spectrometry for the rapid and simple analysis of complex mixtures, particularly oriented towards forensics and high throughput bioanalysis. Recently he was awarded the 2020-2021 Charles H. Viol Memorial fellowship for his work during his first years as doctoral student.

We describe an automated high throughput screening system which is used to acquire mass spectra at a rate of 6,000 samples/hour using desorption electrospray ionization (DESI). The system has been used to screen organic reactions and select optimum conditions for scaled-up drug synthesis, to analyze biological fluids without sample workup, to examine tissue library arrays and to perform label-free quantitative measurements of enzyme kinetics. Extensions of the instrumentation to collection of small amounts of synthesis products for in situ bioassays are also described.

Dr. Xin Yan received her Ph.D. in Chemistry from Purdue University in 2015 under the supervision of Professor R. Graham Cooks. After graduation, she did her postdoctoral research with Professor Richard N. Zare at Stanford University.
Dr. Xin Yan joined the chemistry department, Texas A&M University as an assistant professor in the summer of 2018. Her research centers around the development and application of droplet chemistry in lipid/metabolite analysis, reaction acceleration, and new synthetic methods.

Lipids play a vital role in maintaining cellular functions. Altered lipid metabolism is currently considered a hallmark of many diseases, which highlights the importance of the characterization of lipid composition in understanding, diagnosing, and treating pathologies. Discrimination of isomeric species is challenging in lipidomics. In this talk, I will introduce the microdroplet electrochemical methods capable of resolving different types of isomers commonly encountered in lipid samples using electrospray ionization mass spectrometry. The methods take advantage of the voltage-controlled and dramatically accelerated electrochemical derivatization of lipid isomers in microdroplets to achieve structural elucidation. Applications of the electrochemical mass spectrometry methods in real sample analysis will also be included.