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Richard M. Caprioli

Title and Contact Information

Professor of Biochemistry; Director of the Mass Spectrometry Research Center Vanderbilt University School of Medicine
Office: 9160 MRB III
Phone: (615) 322-4336


Ph.D., Columbia University, 1969


Mass spectrometry
Chemical Biology
Bioanalytical Chemistry
Analytical Chemistry 

In the News

Reporter-Caprioli’s research achievements honored
Research News @ Vanderbilt-Vanderbilt and University of Melbourne fund $344,000 in joint research projects
VICC-Richard Caprioli, has been recognized by the American Association for the Advancement of Science
Reporter-Antibacterial protein's molecular workings revealed
Research News @ Vanderbilt-Vanderbilt awarded $16.5 million agreement to determine how toxic agents affect human cells


Richard M. Caprioli is the Stanley Cohen Professor of Biochemistry and Director of the Mass Spectrometry Research Center at Vanderbilt University School of Medicine. He is also currently Professor in the Departments of Chemistry and Pharmacology at Vanderbilt University. Dr. Caprioli received his B.S. in 1965 from Columbia University in New York, N.Y., his Ph.D. in 1969 in Biochemistry, also at Columbia University with Professor David Rittenberg. He did a one-year postdoctoral fellowship at Purdue University with Professor John H. Beynon. In 1970, he was appointed as Assistant Professor of Biochemistry at Purdue. In 1975, Dr. Caprioli moved to the University of Texas Medical School in Houston where he was Professor of Biochemistry and Molecular Biology and Director of the Analytical Chemistry Center until his move to Nashville in February, 1998.

The research interests of this laboratory are aimed at the investigation of biological processes involving the synthesis, modification, storage and degradation of certain peptides and proteins using modern mass spectrometric methods of analysis to follow molecular events. In recent years there has been a great amount of interest in investigating the biochemical events involved in the metabolism of peptides, primarily in the brain and gut of mammals, encompassing the enzymatic breakdown of these peptides, their production from peptide and protein precursors, and the disruption of these processes by certain xenobiotics. Modern mass spectrometric techniques are used in these studies, including electrospray and matrix-assisted laser desorption ionization mass spectrometry. This research is generally carried out with two experimental approaches.

The first involves in vivo metabolic studies in live animals (rats) using microdialysis sampling procedures together with molecular identification and quantitation by electrospray tandem mass spectrometry. This experimental approach allows us to measure metabolic events that occur in freely moving animals at a level of 50-100 attomoles in the tissue dialysate. Integrated technology for microdialysis/mass spectrometry utilizes quadrupole mass spectrometry (MS/MS) and micro-electrospray ionization (micro-ESI) for very high sensitivity measurements. The micro-ESI source has been optimized to produce ions from the electrospray process at sub-microliter per min flow rates. The application of combined microdialysis/ESI mass spectrometry is ongoing in four areas, i) Investigation of the kinetics and quantitative aspects of the in vivo metabolism of the neuropeptides and enkephalin neuropeptides, ii) Studies of the kinetics and differential processing of opioid peptide fragment precursors in vivo, iii) Investigation of the in vivo quantitative production and enzymatic degradation of N-acetylaspartyl-glutamate in seizure disorders using a rat model, and iv) Development and measurements of in vivo drug pharmacokinetics, using the drugs haloperidol, valproic acid, cocaine, amphetamine, and the new GABA antagonist n-butyl-3 aminopropylphosphinic acid.

The second experimental approach used in the study of cellular peptide metabolism utilizes new molecular imaging technology that is being developed in our lab. This method involves molecular mapping of animal tissue through the production of ion images obtained from the analysis of mammalian tissue slices by matrix-assisted laser desorption mass spectrometry (MALDI MS)12. This technique permits a tissue section to be mapped in multiple molecular weight values, localizing the molecules in an X, Y coordinate representation of the sample. Ion images are produced by repetitive exposure of the sample to the laser beam, where adjacent spots are irradiated, resulting in an ordered array of mass spectra that are keyed to specific locations in the sample. From one raster of the sample, a specific ion image, at any chosen m/z value, could be produced to give the spatial arrangement of molecules of interest. Current work involves; i) Instrument development involving modifications to an existing commercial MALDI (TOF) mass spectrometer, including changes to the laser optics, target movement system, and instrument control hardware and software, ii) Development of methods for sample preparation and target surface modifications to achieve high sensitivity and high image resolution, with molecular specificity, and iii) Applications to specific research areas involving questions about certain spatial distributions of molecules within specific tissues.

Selected Publications

Libes JM, Seeley EH, Li M, Axt JR, Pierce J, Correa H, Newton M, Hansen E, Judd A, McDonald H, Caprioli RM, Naranjo A, Huff V, O'Neill JA Jr, Lovvorn HN, Kenyan Wilms Tumor Consortium. Race disparities in Peptide profiles of north american and kenyan wilms tumor specimens. Journal of the American College of Surgeons. 2014, 218 (4): 707-20.

Caprioli RM. Imaging Mass Spectrometry: Molecular Microscopy for Enabling a New Age of Discovery. Proteomics. 2014, 0 (0): [Epub ahead of print].

Seeley EH, Wilson KJ, Yankeelov TE, Johnson RW, Gore JC, Caprioli RM, Matrisian LM, Sterling JA. Co-registration of multi-modality imaging allows for comprehensive analysis of tumor-induced bone disease. Bone. 2014, 61 (0): 208-16.

Kriegsmann M, Seeley EH, Schwarting A, Kriegsmann J, Otto M, Thabe H, Dierkes B, Biehl C, Sack U, Wellmann A, Kahaly GJ, Schwamborn K, Caprioli RM. MALDI MS imaging as a powerful tool for investigating synovial tissue. Scandinavian Journal of Rheumatology. 2012, 41 (4): 305-309.

Oswald-Richter KA, Beachboard DC, Seeley EH, Abraham S, Shepherd BE, Jenkins CA, Culver DA, Caprioli RM. Dual Analysis for Mycobacteria and Propionibacteria in Sarcoidosis BAL. Journal of Clinical Immunology. 2012, 32 (5): 1129-1140.

Attia AS, Schroeder KA, Seeley EH, Wilson KJ, Hammer ND, Colvin DC, Manier ML, Nicklay JJ, Rose KL, Gore JC, Caprioli RM, Skaar EP. Monitoring the Inflammatory Response to Infection through the Integration of MALDI IMS and MRI. Cell Host & Microbe. 2012, 11 (6): 664-673.

Thiery G, Mernaugh RL, Yan HP, Spraggins JM, Yang JH, Parl FF, Caprioli RM. Targeted Multiplex Imaging Mass Spectrometry with Single Chain Fragment Variable (scfv) Recombinant Antibodies. Journal of the American Society for Mass Spectrometry. 2012, 23 (10): 1689-1696.

Seeley EH, Caprioli RM. 3D Imaging by Mass Spectrometry: A New Frontier. Analytical Chemistry. 2012, 84 (5): 2105-2110.

Yang JH, Chaurand P, Norris JL, Porter NA, Caprioli RM. Activity-Based Probes Linked with Laser-Cleavable Mass Tags for Signal Amplification in Imaging Mass Spectrometry: Analysis of Serine Hydrolase Enzymes in Mammalian Tissue. Analytical Chemistry. 2012, 84 (8): 3689-3695.

Lazova R, Seeley EH, Keenan M, Gueorguieva R, Caprioli RM. Imaging Mass Spectrometry-A New and Promising Method to Differentiate Spitz Nevi From Spitzoid Malignant Melanomas. American Journal of Dermatopathology. 2012, 34 (1): 82-90.

Yang JH, Caprioli RM. Matrix Sublimation/Recrystallization for Imaging Proteins by Mass Spectrometry at High Spatial Resolution. Analytical Chemistry. 2011, 83 (14): 5728-5734.

Seeley EH, Schwamborn K, Caprioli RM. Imaging of Intact Tissue Sections: Moving beyond the Microscope. Journal of Biological Chemistry. 2011, 286 (29): 25459-25466.

Chacon A, Zagol-Ikapitte I, Amarnath V, Reyzer ML, Oates JA, Caprioli RM, Boutaud O.On-tissue chemical derivatization of 3-methoxysalicylamine for MALDI-imaging mass spectrometry. Journal of Mass Spectrometry. 2011, 46 (8): 840-846.

Manna JD, Reyzer ML, Latham JC, Weaver CD, Marnett LJ, Caprioli RM. Ma ZQ, Chambers MC, Ham AJL, Cheek KL, Whitwell CW, Aerni HR, Schilling B, Miller AW, Caprioli RM, Tabb DL. High-Throughput Quantification of Bioactive Lipids by MALDI Mass Spectrometry: Application to Prostaglandins. Analytical Chemistry. 2011, 83 (17): 6683-6688.

Ma ZQ, Chambers MC, Ham AJL, Cheek KL, Whitwell CW, Aerni HR, Schilling B, Miller AW, Caprioli RM, Tabb DL. ScanRanker: Quality Assessment of Tandem Mass Spectra via Sequence Tagging. Journal of Proteome Research. 2011, 10 (7): 2896-2904.

Hardesty WM, Kelley MC, Mi DM, Low RL, Caprioli RM. Protein signatures for survival and recurrence in metastatic melanoma. Journal of Proteomics. 2011, 74 (7): 1002-1014.

Manier ML, Reyzer ML, Goh A, Dartois V, Via LE, Barry CE, Caprioli RM. Reagent Precoated Targets for Rapid In-Tissue Derivatization of the Anti-Tuberculosis Drug Isoniazid Followed by MALDI Imaging Mass Spectrometry. Journal of The American Society for Mass Soectrometry. 2011, 22 (8): 1409-1419.

Mainini V, Kliman M, Angel PM, Magni F, Caprioli RM. Detergent enhancement of on-tissue protein analysis by matrix-assisted laser desorption/ionization imaging mass spectrometry. Rapid Communications in Mass Spectrometry. 2011, 25 (1): 199-204.

Seeley EH, Caprioli RM. MALDI imaging mass spectrometry of human tissue: method challenges and clinical perspectives. Trends Biotechnol. 2011, 29 (3): 136-43.

Ridenour WB, Kliman M, McLean JA, Caprioli RM. Structural Characterization of Phospholipids and Peptides Directly from Tissue Sections by MALDI Traveling-Wave Ion Mobility-Mass Spectrometry. Analytical Chemistry. 2010, 82 (5): 1881-1889.

Pozzi A, Popescu V, Yang SL, Mei SJ, Shi MJ, Puolitaival SM, Caprioli RM, Capdevila JH. The Anti-tumorigenic Properties of Peroxisomal Proliferator-activated Receptor alpha Are Arachidonic Acid Epoxygenase-mediated. Journal of Biological Chemistry. 2010, 285 (17): 12840-12850.

Oppenheimer SR, Mi DM, Sanders ME, Caprioli RM. Molecular Analysis of Tumor Margins by MALDI Mass Spectrometry in Renal Carcinoma. Journal of Proteome Research. 2010, 9 (5): 2182-2190.

Chung CH, Seeley EH, Roder H, Grigorieva J, Tsypin M, Roder J, Burtness BA, Argiris A, Forastiere AA, Gilbert J, Murphy B, Caprioli RM, Carbone DP, Cohen EEW. Detection of Tumor Epidermal Growth Factor Receptor Pathway Dependence by Serum Mass Spectrometry in Cancer Patients. Cancer Epidemiology Biomarkers & Prevention. 2010, 19 (2): 358-365.

Bauer JA, Chakravarthy AB, Rosenbluth JM, Mi DM, Seeley EH, Granja-Ingram ND, Olivares MG, Kelley MC, Mayer IA, Meszoely IM, Means-Powell JA, Johnson KN, Tsai CJ, Ayers GD, Sanders ME, Schneider RJ, Formenti SC, Caprioli RM, Pietenpol JA. Identification of Markers of Taxane Sensitivity Using Proteomic and Genomic Analyses of Breast Tumors from Patients Receiving Neoadjuvant Paclitaxel and Radiation. Clinical Cancer Research. 2010, 16 (2): 681-690.

Nordquist KA, Dimitrova YN, Brzovic PS, Ridenour WB, Munro KA, Soss SE, Caprioli RM, Klevit RE, Chazin WJ. Structural and Functional Characterization of the Monomeric U-Box Domain from E4B. Biochemistry. 2010, 49 (2): 347-355.