December Meeting

Speaker: Dingyin Tao, National Center for Advancing Translational Sciences, NIH

Topic: From Mass Spectrometry-Based Proteomics to Patient Care

Date: December 11, 2023

Time: 6:15 pm Dinner, 7:15 pm Presentation

Location: Shimadzu Scientific Instrument, Inc. Training Center 7100 Riverwood Drive, Columbia, MD 21046 (Directions)

Dinner: Please RSVP to Jonathan Ferguson (jonathan.ferguson33@gmail.com) by Friday, December 8 if you will be attending the dinner.

Abstract: Mass spectrometry-based proteomics plays a vital role in various stages of translational science, e.g. biomarker discovery and drug target identification. I will discuss these two separate cases: the first part focuses on the discovery of 35 parasite markers from which we selected a single candidate for use in a point-of-need (PON) rapid diagnostic test. We performed a cross-sectional, multi-omics study of saliva from 364 children with subclinical infection in Cameroon and Zambia, and produced a prototype saliva-based PON lateral flow immunoassay test for P. falciparum gametocyte carriers. This assay is being commercialized by a company founded in South Africa. The second part focuses on a new drug target for an old drug, Auranofin. UBA1 is the primary E1 ubiquitin-activating enzyme responsible for generation of activated ubiquitin required for ubiquitination, a process that regulates stability and function of numerous proteins. Abnormal UBA1 activity or ubiquitination causes or drives many human diseases, such as cancer, major neurodegenerative diseases, Angelman syndrome, VEXAS syndrome, and spinal muscular atrophy, as well as aging, highlighting the importance of the discovery of small molecule modulators of UBA1 activity for research and therapeutic purposes. Auranofin, a drug approved for the treatment of rheumatoid arthritis, was found in our high-throughput compound screen assay. Furthermore, HPLC-MS/MS was used to identify UBA1 as the new drug target of Auranofin. Through proteomics analysis, it was confirmed that auranofin binds to UBA1’s ubiquitin fold domain and conjugates to the Cys 1039 residue. This binding enhances interactions of UBA1 with at least 20 different E2 ubiquitin-conjugating enzymes, facilitating ubiquitin charging to E2 and increasing the activities of seven representative E3s in vitro. Auranofin promotes ubiquitination and degradation of misfolded ER proteins during ER-associated degradation in cells at low nanomolar concentrations. It also facilitates outer mitochondrial membrane-associated degradation. These findings suggest auranofin can serve as a much-needed tool for UBA1 research and therapeutic exploration.
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WBMSDG is including a lightning talk before the main talk at each event. Each lightning talk lasts 7 minutes with no more than 5 slides, and 5 minutes for Q&A. The desired speakers are early-career researchers/scientists in mass spec-related areas. They can be junior scientists, postdoctoral fellows, graduate or undergraduate students.

Please submit abstracts to co-chairs to apply for the lightning talks, and our board members will review the abstracts on a rolling basis.

Structure the abstract (maximum 300 words) with the following headings:
Title (maximum 20 words)
Authors and affiliations (Including senior authors/PIs)
Introduction
Methods
Results
Conclusions

November Meeting

Speaker: Kristine Glunde, Johns Hopkins University

Topic: Toward MALDI Microscopy: FluoMALDI, RaMALDI, and Single Cells

Date: November 13, 2023

Time: 6:15 pm Dinner, 7:15 pm Presentation

Location: Shimadzu Scientific Instrument, Inc. Training Center 7100 Riverwood Drive, Columbia, MD 21046 (Directions) This will be an in-person meeting.

Dinner: Please RSVP to Jonathan Ferguson (jonathan.ferguson33@gmail.com) by Friday, November 10 if you will be attending the dinner.

Abstract: The spatial resolution of matrix-assisted laser desorption/ionization (MALDI) imaging has significantly improved over the years and has now reached single cell resolution on commercial imaging mass spectrometers. This opens new possibilities of combining MALDI imaging with optical microscopy technologies including Raman and fluorescence microscopy. This talk will discuss our recently developed RaMALDI and FluoMALDI applications, which are streamlined, integrated, multimodal imaging workflows of Raman and fluorescence microscopy with MALDI imaging, performed on a single tissue section with one sample preparation protocol. In these projects, we discovered that co-crystallization of fluorophores with MALDI matrices significantly enhances fluorophore brightness, enabling the amplification of innate tissue autofluorescence and exogenous fluorophores. FluoMALDI and RaMALDI will advance structural-functional microscopic imaging in cell biology, biomedicine, and pathology.
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WBMSDG has decided to include a lightning talk before the main talk at each event. Each lightning talk lasts 7 minutes with no more than 5 slides, and 5 minutes for Q&A. The desired speakers are early-career researchers/scientists in mass spec-related areas. They can be junior scientists, postdoctoral fellows, graduate or undergraduate students.

Please submit abstracts to co-chairs to apply for the lightning talks, and our board members will review the abstracts on a rolling basis.

Structure the abstract (maximum 300 words) with the following headings:
Title (maximum 20 words)
Authors and affiliations (Including senior authors/PIs)
Introduction
Methods
Results
Conclusions

October Meeting

Speaker: Bill McDonough, University of Maryland

Topic: I didn’t know you could do that

Date: Monday, October 16, 2023

Time: 6:15 pm Dinner, 7:15 pm Presentation

Location: Shimadzu Scientific Instrument, Inc. Training Center 7100 Riverwood Drive, Columbia, MD 21046 (Directions) This will be an in-person meeting.

Dinner: Please RSVP to Jonathan Ferguson (jonathan.ferguson33@gmail.com) by Friday, October 13 if you will be attending the dinner.

Abstract: When I started out in the mass spectrometry business, I didn’t have any background (undergraduate degree in anthropology). However, by the end of my PhD, I was pretty good at analyzing samples on a thermal ionization mass spectrometer (TIMS). However, ignorance was an advantage, and nobody told me what I could and could not do. We bought bits and pieces, put them together, and we learned how to do things; we called our friends, and I asked lots of questions. The best two things that happened (1) we had good friends, and (2) we got a lot of money to start out with. We were not entirely stupid, but we were naïve. That helps a lot. Tonight, I’ll talk about a 30 year journey of fun LA-ICPMS accomplishments by our team that covers nuclear forensic, cutting-edge geochemistry, whodunit poisoning stories, pollution in the region, and getting ready for working on the Moon.
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Our WBMSDG board has decided to include two lightning talks before the main talk starting on our October event. Each lightning talk lasts 7 minutes with no more than 5 slides, and 5 minutes for Q&A for both talks. The desired speakers are early-career researchers/scientists in mass spec-related areas. They can be junior scientists, postdoctoral fellows, graduate or undergraduate students.

Please submit abstracts to co-chairs to apply for the lightning talks, and our board members will review the abstracts on a rolling basis.

Structure the abstract (maximum 300 words) with the following headings:
Title (maximum 20 words)
Authors and affiliations (Including senior authors/PIs)
Introduction
Methods
Results
Conclusions