Inside the UW School of Pharmacy’s Mass Spectrometry Center

When Dale Whittington arrived at the University of Washington, he did not imagine that he would one day help shape one of the School of Pharmacy’s most consequential research facilities. Trained as a biologist, with a career path that briefly veered away from science altogether, Whittington eventually found his way back—drawn by the chance to work at the intersection of discovery, teaching, and problem-solving.
More than a decade later, as technical director and manager of the UW School of Pharmacy’s Mass Spectrometry Center, he oversees an operation that quietly underpins a wide range of scientific work. It is not a space defined by spectacle, but by precision: instruments that weigh molecules with extraordinary accuracy, revealing details that would otherwise remain invisible.
At its core, mass spectrometry rests on a deceptively simple principle. Molecules are given an electrical charge and guided through electromagnetic fields toward a detector. How they move—and how long they take to arrive—reveals their identity, structure, and abundance. From this information, researchers can determine molecular weights, concentrations, and subtle chemical differences that shape how drugs behave in the body.
From small molecules like amino acids to complex proteins and antibodies, mass spectrometry has become a foundational tool across chemistry, biology, and medicine. Its reach is broad, but its value lies in specificity.
From Molecules to Meaning
The real power of mass spectrometry emerges not from the instrument itself, but from the questions it allows scientists to ask. Researchers use it to track how medications are absorbed, distributed, and eliminated; to study how proteins change in disease; and to understand why a therapy may work well in one context but fail in another.
“This is the tool that lets us interrogate biological and chemical questions at a fundamental level,” Whittington says. “Whether you’re studying drug concentrations in tissue or changes in proteins during disease, mass spectrometry gives you a way to see what’s actually happening.”
For Mary Hebert, a professor of pharmacy and director of the UW’s Obstetric-Fetal Pharmacology Research Unit, the Center’s work is essential to understanding how medications behave during pregnancy and lactation—populations historically underrepresented in clinical research.
“The pharmacokinetics of most medications have not been studied in these populations,” she explains. “The Mass Spectrometry Center has made it possible to identify not only how drug handling changes during pregnancy, but also allows us to make informed predictions about other medications eliminated via similar pathways.”
Learning by Doing
What distinguishes the UW School of Pharmacy’s Mass Spectrometry Center is not only its technical capacity, but its approach to training. At many institutions, mass spectrometers are operated exclusively by specialists, with users receiving only processed data. At UW, students are encouraged to engage directly with the instruments themselves.
“Our goal is to train mass spectrometrists, not just data recipients,” Whittington says. “Students learn how to prepare samples, optimize methods, troubleshoot problems, and design experiments from start to finish.”
Graduate students progress quickly from observation to hands-on work. By their third session, many are expected to operate independently, with staff stepping in only when needed. The experience demystifies the technology—and builds confidence.
That experience carries weight beyond the university. Graduates trained at the Center enter industry and academic labs able to operate instruments, interpret results, and adapt methods with minimal supervision. Employers recognize the difference.
Medicinal Chemistry Affiliate Assistant Professor Kim Alonge, whose research focuses on the brain’s extracellular matrix, sees that impact firsthand in her trainees. “Direct access to mass spectrometry empowers them to generate and interpret complex datasets independently,” she says. “That accelerates their development as scientists and makes them more competitive for fellowships and careers.”
Expanding the Boundaries
While pharmaceutical research remains central to the Center’s mission, its applications extend far beyond drug development. Mass spectrometry has been used to analyze compounds in cannabis products, verify the composition of fish oil supplements, and even fingerprint wines to confirm their geographic origins.
One rapidly advancing area is MALDI imaging, a technique that allows researchers to map the spatial distribution of molecules within thin slices of tissue. The sample remains intact, preserving information about where compounds accumulate—or fail to reach.
This approach has reshaped understanding of HIV therapies by revealing uneven drug penetration in tissues, helping explain how viral reservoirs persist despite treatment. In neuroscience, it is opening new windows into the chemistry of the brain.
Using the Bruker timsTOF fleX platform, the only open access MALDI (matrix assisted laser desorption ionization) tissue imaging mass spectrometry in the northwest, UW students and researchers working with Alonge have mapped glycans in the hippocampus, uncovering spatial patterns linked to Alzheimer’s disease. “Without access to this facility—and this specific technology—those insights would not have been possible,” she says.
Looking ahead, Whittington sees artificial intelligence playing a growing role in managing the sheer volume of data mass spectrometry generates. “There’s more information than any one person can reasonably process,” he notes. “If we can apply AI in a careful, unbiased way, it may reveal patterns we’re not yet able to see.”
A Place to Grow
For Whittington, the appeal of the Center lies in its constant motion. Each project presents a new puzzle; each student brings a different way of thinking. The work resists routine.
“I feel fortunate to do something that’s always changing,” he says. “Between the teaching, the experiments, and the problem-solving, no two days are the same.”
For students and researchers alike, the Mass Spectrometry Center is more than a shared resource. It is a place where theory meets practice, where complex tools become accessible, and where careful measurement leads to clearer understanding.
As Hebert puts it, “There are critical questions—especially in pregnancy—that simply can’t be answered without highly sensitive, specific assays. Without this Center, we would not be able to quantify drug exposures that matter for both mother and child.”
In a field often defined by what cannot yet be seen, the Mass Spectrometry Center helps bring the invisible into focus—one molecule at a time.
Short Cut: What Does a Mass Spectrometer Do?
- A mass spectrometer is a scientific instrument that can be used to identify and measures molecules by their mass to charge ratio. It works by giving molecules an electrical charge and guiding them through electric or magnetic fields to elicit an electrical response on a detector. Because mass spectrometers can manipulate the transmission of molecules through electrical fields, the instrument can be used to determine what substances are present and ultimately help calculate much of each one there is. Scientists use mass spectrometers to study everything from how drugs move through the body, to how proteins change in disease, to where specific compounds are located within tissues. In short, mass spectrometry allows researchers to detect and measure chemicals with extraordinary specification and precision—often at levels far too small to see by any other method.
Resources:
- UW School of Pharmacy Mass Spectrometry Center
- Department of Medicinal Chemistry


CHOICE PhD student Hui-Hsuan Chan was selected as the School’s 2025 Magnuson Scholar—an honor presented annually to one student from each of UW’s six Health Sciences schools. Funded by the Warren G. Magnuson Institute, the award recognizes both academic achievement and the potential for impactful research in fields like diabetes and public health.
Zizi Elsisi, a PhD graduate of the CHOICE Institute, was honored with the 2025 Outstanding Dissertation Award for her rigorous and timely work on subscription-based payment models for Hepatitis C treatment in Louisiana and Washington.
Chris Arian, from the Department of Pharmaceutics, also received the 2025 Outstanding Dissertation Award for his development of an intestinal microphysiological system (MPS) using a long-term cultured enteroid monolayer model. His innovative research is poised to significantly advance the field of drug metabolism and drug–drug interaction (DDI) prediction.
PhD candidate Aurora Authement was recognized with the School’s 2025 Graduate Student Leadership Award for her outstanding contributions to the Pharmaceutics Department and her mentorship within the student community.
Medicinal Chemistry PhD candidate Alesi Escobedo was selected for the 2025 Graduate Student Leadership Award in recognition of her exceptional service, mentorship, and positive impact across the department.
Tori Dayer, PharmD and current PhD student at the CHOICE Institute, received the 2025 Graduate Student Leadership Award for her lasting impact on the program and her peers.
UW’s Board of Health Sciences Deans announced this week that fourth-year UWSOP Medicinal Chemistry student Alex Wiley has been named a 2023-2024 Magnuson Scholar. She is one of 7 awardees honored this year for both her academic performance and potential contributions to research in the health sciences.







UWSOP would like to congratulate Amy Li, a 4th-year Medicinal Chemistry student in the UW XuLab, on being named a 2020-21 Magnuson Scholar! Amy studies the metabolism of cholesterol precursors, and how defects in that process relate to neurodevelopmental and metabolic diseases. She was selected on the basis of her excellent academic performance and outstanding potential for research in the health sciences.




Abhinav Nath, PhD, Associate Professor, Department of Medicinal Chemistry

Brian Werth, PharmD, Associate Professor, Department of Pharmacy
Cathy Yeung, PharmD, PhD, Assistant Professor, Department of Pharmacy








On July 1, 2019, UW School of Pharmacy Professor and Dean Sean D. Sullivan appointed Professor Nina Isoherranen to the Milo Gibaldi Endowed Chair of Pharmaceutics. Her appointment makes her the first woman to chair the department.
After thirteen years leading the Department of Pharmaceutics to international success, Professor Kenneth Thummel will return to faculty full time and Professor Nina Isoherranen will become the Milo Gibaldi Endowed Chair of Pharmaceutics.

The UWSOP Outstanding Dissertation Award celebrates a graduate student who has conducted outstanding research at the doctoral (PhD) level. This year we celebrate Dennis Goulet, whose dissertation, “Biophysical Approaches for the Development of Stable, Long-Lived, Multi-Functional, and Potent Antibody Therapeutics,” was selected for UWSOP’s Outstanding Dissertation Award.
The UWSOP Graduate Student Leadership Awards honors one graduate student in each of our three departments who has demonstrated outstanding leadership and service that has had a positive impact on the School of Pharmacy, UW, the Northwest community, scientific and/or professional community. Benjamin Maldonato received this year’s UWSOP Medicinal Chemistry Student Leadership Award. Ben is a senior graduate student in the Med Chem department, conducting his thesis research in Dr. Rheem Totah’s lab. He is well-regarded for his understanding the value of community and how to contribute to its strength, often leading or organizing events that benefit both Medicinal Chemistry and Pharmaceutics.


Don’t miss out on these UWSOP alumni and faculty presenting at ISSX!




























The Royalty Research fund (RRF) is sponsored by UW’s Office of Research to help faculty establish new research programs. The program is funded from royalty and licensing fee income generated by the UW Technology transfer program. These one-year awards have been offered semi-annually since 1992.
Scott W. Grimm was a long-time friend of Medicinal Chemistry and the School of Pharmacy. A Corporate Advisory Board member who enthusiastically supported our students and programs, he was also a leader in drug discovery and development via his 27-year career with AstraZeneca. When Scott died in 2014, his family and colleagues established a permanent endowed fund in his name to support a high-achieving graduate student in Medicinal Chemistry, whose research supports the fight against brain cancer.










The American Foundation for Pharmaceutical Education’s Pre-Doctoral Award in Pharmaceutical Science has been awarded again to Med Chem graduate student Robert Pelletier (Kent Kunze lab). Pelletier has received a renewal of this Fellowship through August 2017, with another stipend of $10,000, to support his thesis project, “Mechanism of CYP2E1 Inhibition by Chlormethiazole.” He will continue to explore the potential of chlormethiazole to inhibit CYP2E1’s ability to cause toxic reactions in substances such as the over-the-counter drug acetaminophen. See the original article for more details, at 













Kelly M. Hines, Ph.D., senior fellow in the 






























The American Association of Colleges of Pharmacy (AACP) recently honored Dr. Brendan Stamper and his colleagues at the 2014 AACP annual meeting. Dr. Stamper is a former Med Chem graduate student who received his Ph.D. in 2010 and is now an Assistant Professor in the School of Pharmacy at Pacific University in Hillsboro, Oregon.
Dr. Brianne Raccor, Senior Fellow in the Rheem Totah laboratory and a Elmer M. and Joy B. Plein Fellow, has taken a position as Assistant Professor in Pharmaceutical Sciences at Campbell University in Buies Creek, North Carolina. “I am delighted to be a new member of the faculty at Campbell,” said Brianne. “My excellent training in the Totah lab and my time as a Plein Fellow have prepared me well for a successful career in research and teaching.”
The Department of Medicinal Chemistry is proud to congratulate alumnus Michael Adams, Ph.D. for his recent appointment as Dean of the College of Pharmacy & Health Sciences at Campbell University in Buies Creek, North Carolina. Michael did his graduate work in Medicinal Chemistry with the late Sid Nelson and graduated in 2003. His research interests focus on causes and mechanisms for prevention of drug-induced liver disease, with particular attention to xenobiotics that cause liver damage after metabolism.
Medicinal Chemistry graduate student Ryan Seguin (Kent Kunze lab) has been awarded the prestigious Magnuson Scholarship for 2014-2015. The University names six Magnuson Scholars annually, one from each of the health sciences schools. Awardees are selected based on their academic performance and potential contributions to health sciences research.
Former Medicinal Chemistry postdoctoral fellow Klarissa Hardy has received a 2014 New Investigator Award from the American Association of Colleges of Pharmacy (AACP). Klarissa, now an Assistant Professor at Lipscomb University College of Pharmacy in Nashville, TN, was one of 17 award recipients for 2014. The New Investigator program provides start-up funding for new pharmacy faculty’s research programs. The awards are given to individual faculty starting their academic careers at ACPE-accredited colleges or universities in the U.S. Klarissa will receive $10,000 for her research project “Molecular Mechanisms of Drug-Induced Liver Injury by Tyrosine Kinase Inhibitors” as well as a travel award so she may present her findings at the AACP annual meeting in 2015.
The Department of Medicinal Chemistry welcomes Abhinav “Abhi” Nath, PhD, as its newest faculty member. Dr. Nath joins the department as an Assistant Professor, coming from Yale University where he did postdoctoral work in Molecular Biophysics and Biochemistry.
Dr. William Atkins has been named the first Sid Nelson Endowed Professor in Medicinal Chemistry. Bill joined the Med Chem faculty in 1991. His research focuses on the biochemical nature of detoxification enzymes and on drug metabolism, with emphasis on biophysical mechanisms. He has been awarded several NIH grants for his research on enzyme systems. His lab also focuses on characterization of nanoparticles for drug delivery and targeted therapy.
Med Chem student Nick Au (Allan Rettie lab) was recently part of a team of UW graduate students who won a “Best Innovation Idea” prize in the 16th annual UW Business Plan Competition. The team is developing a “smart” polymer contact lens as an alternative delivery platform for people with diabetes.









