1. Kies, P.J., Kraemer-Zimpel, C., Lensmire, J.M., Major, M.R., Burtchett, T.A., Wischer, M.R., and Hammer, Neal D. (2026) Defining the transcriptional adaptation of Staphylococcus aureus to a range of nutritional sulfur supplementation. bioRxiv. June. doi: https://doi.org/10.64898/2026.05.20.726469 (recently accepted for publication at the Journal of Bacteriology)
2. Khan, I., MacDonald, Sandy J., Markusson, S., Kies, P.J., Kraemer-Zimpel, C., Robson, C., Parker, J.L., Newstead, S., Boucher, D., Hammer, N.D., Van Der Woude, M., and Thomas, G.H. (2025) Defined roles for the Staphylococcus aureus POT transporter DtpT in di/tripeptide uptake and glutathione utilization inside human macrophages. PLoS Pathog. Sept 26;21(9):e1013535. doi: 10.1371/journal.ppat.1013535
3. Burtchett, Troy, A., Ottosen, E.N., Jitsukawa, T., Kaneko, M., Yasui, M. Lysne, J.A., Kies, P.J., Bailey, J.A., Thomas, S.M., Fujisaki, S., and Hammer, Neal D. (2025) A redundant isoprenoid biosynthetic pathway supports Staphylococcus aureus metabolic versatility. mBio 16(8):e0035325. doi: 10.1128/mbio.00353-25. PMID: 40586551 PMCID: PMC12345219
** press release: https://natsci.msu.edu/news/2025/2025-07-msu-scientists-discover-hidden-redundancy-in-bacterial-metabolism.aspx
4. Burtchett, Troy A. and Hammer, Neal D. (2025) With a little help from T cells. eLife 14:e106854. doi: 10.7554/eLife.106854 PMID: 40304714 PMCID: PMC12043313
5. Marsh A.C., Zhang, Y., Wagley, Y., Acevedo, P.K., Crimp, M.A., Hammer, N.D., Roch, A., Boccaccini, A.R., and Chatzistavrou, X. (2025) Advancements in reliability of mechanical performance of 3D PRINTED Ag-doped bioceramic antibacterial scaffolds for bone tissue engineering. Biomater Adv. Jan; 166:214039. doi: 10.1016 PMID: 39326251
6. Jacob, K.M. Hernandez-Villamizar, Hammer, N.D., and Reguera, G. (2024) Mucin-induced surface dispersal of Staphylococcus aureus and Staphylococcus epidermidis via quorum-sensing dependent and independent mechanisms. mBio 14;15(8):e0156224. doi: 10.1128/mbio.01562-24. PMID: 38953351 PMCID: PMC11323471
7. Tan, A., Weizhun, Y., O’Brien, N.A., Pan, X., Ramadan, S., March, T., Hammer, N.D., Cywes-Bentley, C., Vinacur, M., Pier, G.B., Gildersleeve, J.C., and Huang, X. (2024) A comprehensive synthetic library of poly-N-acetyl glucosamines enabled vaccine against lethal challenges of Staphylococcus aureus. Nat Commun. 15, 3420 https://doi.org/10.1038/s41467-024-47457-4
8. Hernández-Escobar, D., Pajares-Chamorro, N., Chatzistavrou, X. Hankenson, K.D., Hammer, N.D., and Boehlert C.J. (2024) Tailored coatings for enhanced performance of zinc-magnesium alloys in absorbable implants. ACS Biomater Sci Eng. Jan 8;10, doi:10.1021/acsbiomaterials.3c01255. PMID: 38109649
9. Pajares-Chamorro, N., Hernández-Escobar, D., Wagley, Y., Acevedo, P., Cramer, M., Badylak, S., Hammer, N.D., Hardy, J., Hankenson, K.D., and Chatzistavrou, X. (2023) Silver-releasing bioactive glass nanoparticles for infected tissue regeneration. Biomater. Adv. Nov 154 doi: 10.1016/j.bioadv.2023.213656, PMID: 37844416
10. Lensmire, J.M., Wischer, M.R., Kraemer-Zimpel, C., Kies, P.J., Sosinski, L.M., Ensink, E., Dodson, J.P., Shook, J.C., Delekta, P. C., Copper, C.C., Havlichek, D., Jr., Mulks, M.H., Lunt, S.Y., Ravi, J., and Hammer, Neal D. (2023) The glutathione import system satisfies the Staphylococcus aureus nutrient sulfur requirement and promotes interspecies competition. PLoS Genetics. Jul 7;19 (7):e1010834. doi:10.1371/journal.pgen.1010834. PMID:37418503
11. Burtchett, T.A., Shook, J.C., Hesse, L.E., Delekta, P.C., Brzozowski, R.S., Nouri, A., Calas, A.J., Spanoudis, C.M., Eswara, P.J., and Hammer, Neal D. (2023) Crucial role for lipoteichoic acid assembly in the metabolic versatility and antibiotic resistance of Staphylococcus aureus. Infect. Immun. Jul 18;91(7):e0055022. doi: 10.1128/iai.00550-22. PMID 37347167
12. Pajares-Chamorro, N., Hammer, N.D., and Chatzistavrou, X. (2022) Unraveling the mechanisms of inhibition of silver-doped bioactive glass-ceramic particles. J Biomed Mater Res A. Dec 30. doi:10.1002/jbm.a.37482 PMID:36583930
13. Hammer, Neal D. and Waters, Chris M. (2022) The 27th Annual Midwest Microbial Pathogenesis Conference in the Age of COVID. J. Bacteriol. Jun 21; 204 (6) doi:10.1128/jb.00136-22 PMID: 35506693 PMCID: PMC9210972
*co-corresponding authors
14. Pajares-Chamorro, N., Hammer, N.D., and Chatzistavrou, X. (2022) Materials for Restoring Lost Activity: Old Drugs for New Bugs. Advanced Drug Delivery Reviews; Jul; 186:114302 PMID35461913
15. Kies, P.J. and Hammer, Neal D. (2022) A resourceful race: bacterial scavenging of host sulfur metabolism during colonization. Infect Immun. May 19; 90(5):e0057921 PMID: 35315692 DOI: 10.1128/iai.00579-21 PMID: 35315692 PMCID: PMC9119060
16. Boumegouas, M., Raju, M., Gardiner, J., Hammer, N.D., Saleh, Y., Al-Abcha, A., Kalra, A., and Abela, George, S. (2022) Interaction between bacteria and cholesterol crystals: implications for endocarditis and atherosclerosis. PLoS One; 17(2):e0263847. Doi: 10.1371/journal.pone.0263847 PMID: 35180238 PMCID: PMC8856546
17. Pajares-Chamorro, N., Wagley, Y., Hammer, N.D., and Chatzistavrou, X. (2021) Bioactive glass particles as multi-functional therapeutic carriers against antibiotic-resistant bacteria. J. Am. Ceram. Soc.; 00:1-12. https://doi.org/10.1111/jace.17923
18. Marsh, A.C., Mellott, N.P., Crimp, M., Wren, A., Hammer, N.D., and Chatzistavrou, X. (2021) Silver-Doped Bioactive Glass-ceramic 3D Scaffolds: A Microstructural Study to Antibacterial and Biological Performance. J. Euro. Ceram. Soc. 41:3713-30. https://doi.org/10.1016/j.jeurceramsoc.2021.01.011
19. Marsh, A.C., Zhang, Y., Poli, L., Hammer, N.D., Roch, A., Crimp, M., and Chatzistavrou, X. (2021) 3D printed bioactive and antibacterial silicate glass-ceramic scaffold by fused filament fabrication. Mater. Sci. Eng. C. 111516, doi:10.1016/j.msec.2020.111516. PMID: 33255072
20. Pajares-Chamorro, N., Wagley, Y., Maduka, C.V., Youngstrom, D.W., Yeger, A, Badylak, S.F., Hammer, N.D., Hankenson, K.D., and Chatzistavrou, X. (2021) Silver-doped bioactive glass particles for in vivo bone tissue regeneration and enhanced methicillin-resistant Staphylococcus aureus (MRSA) inhibition, Mater Sci Eng C Mater Biol Appl. 111693, ISSN 0928-4931, https://doi.org/10.1016/j.msec.2020.111693. PMID: 33545854 PMCID: PMC8168684
21. Hammer, Neal D. mSphere of Influence: A Controlled Burn-Pathogen Manipulation of the Dynamic Chemistry That Results from Inflammation. (2020) mSphere 5 (1):e00110-20. doi: 10.1128/mSphere.00110-20. PMID: 32102940 PMCID: PMC7045386
22. Soule, L.D., Pajares-Chomorro, N., Chuong, K., Mellott, N., Hammer, N.D., Hankenson, K.D., Chatzistavrou, X. (2020) Sol–Gel-Derived Bioactive and Antibacterial Multi-Component Thin Films by the Spin-Coating Technique. ACS Biomater. Sci. & Eng. 6, 10, 5549-5562 PMID 33320549
23. Lensmire, J.M., Dodson, J.P., Hsueh, B.Y., Wischer, M.R., Delekta, P.C., Shook, J.C., Ottosen, E.N., Kies, P.J., Ravi, J., and Hammer, Neal D. (2020) The Staphylococcus aureus cystine transporters, TcyABC and TcyP, facilitate nutrient sulfur acquisition during infection. Infection and Immunity, PMID: 31843961 PMCID:PMC7035926
24. Pajares-Chamorro, N., Shook, J.C., Hammer, N. D., and Chatzistavrou, X. (2019) Resurrection of Antibiotics that MRA Resists by Silver-Doped Bioactive Glass-Ceramic Microparticles. Acta Biomaterialia, PMID: 31302297
25. Marsh, A.C., Mellott, N., Pajares-Chamorro, N., Crimp, M., Wren, A., Hammer, N.D., and Chatzistavrou, X. (2019) Fabrication and multiscale characterization of 3D silver-containing bioactive glass-ceramic scaffolds. Bioactive Materials, 4:215-223. PMID: 31236524 PMCID:PMC6580235
26. Delekta, P.C., Lydic, T.A. and Hammer, Neal D. (2019) Isolation of lipoprotein particles from chicken egg yolk for the study of bacterial pathogen fatty acid incorporation into membrane phospholipids. Journal of Visualized Experiments, 147 doi: 10.3791/59538. PMID: 31157784 PMCID: PMC5952394
27. Lensmire, J.M. and Hammer, Neal D. (2019) Nutrient sulfur acquisition strategies employed by bacterial pathogens. Current Opinion in Microbiology, 47:52-58. PMID: 30530037
28. Delekta, P.C., Shook, J.C., Lydic, T.A. and Hammer, Neal D. (2018) Staphylococcus aureus utilizes host lipoprotein particles as a source of fatty acids. Journal of Bacteriology, doi: 10.1128/JB.00728-17. PMID: 29581406 PMCID: PMC5952394
** Press release: https://msutoday.msu.edu/news/2018/using-mrsas-strength-against-it/
29. Coulson, G.B., Johnson, B.K., Colvin, C.J., Fillinger, R.J., Zheng, H., Haiderer, E.R., Hammer, N.D., and Abramovitch, R.B. (2017) Targeting Mycobacterium tuberculosis sensitivity to thiol stress at acidic pH kills the bacterium and potentiates antibiotics. Cell Chemical Biology, 24:993-1004. PMID: 28781126 PMCID: PMC5562523
30. Hammer, Neal D., Schurig-Briccio, L.A., Gerdes, S.Y., Gennis, R.B., and Eric P. Skaar. (2016) CtaM is required for menaquinol oxidase aa3 function in Staphylococcus aureus. MBio, 7(4): pii: e00823-16. PMID: 27406563 PMCID: PMC4958251
31. Hendrix, A.S., Spoonmore, T.J., Wilde, A.D., Putnam, N.E., Hammer, N.D., Snyder, D.J., Guelcher, S.A., Skaar, E.P., and Cassat, J. E. (2016) Repurposing the nonsteroidal anti-inflammatory drug diflunisal as an osteoprotective, anti-virulence therapy for Staphylococcus aureus osteomyelitis. Antimicrobial agents and chemotherapy. Jun 20.PMID: 27324764 PMCID: PMC4997817
32. Wilde, A.D., Snyder, D.J., Putnam, N.E., Valentino, M.D., Hammer, N.D., Lonergan, Z.R., Hinger, S.A., Aysanoa, E.E., Blanchard, C., Dunman, P.M., Wasserman, G.A, Chen, J., Shopsin, B., Gilmore, M.S., Skaar, Eric P., and James E. Cassat (2015) Bacterial Hypoxic Response Revealed as Critical Determinants of the Host-Pathogen Outcome by TnSeq Analysis of Staphylococcus aureus Invasive Infection. PLoS Pathogens, 11:e1005341 PMID:26684646 PMCID: PMC4684308
33. Spraggins, J.M., Rizzo, D., Moore, J.L., Rose, K.L., Hammer, N.D., Skaar, Eric P., and Richard M. Caprioli. (2015) MALDI FTICR IMS of intact proteins: Using mass accuracy to link protein images with proteomic data. Journal of the American Society of Mass Spectrometry, 26: 974-85 PMID 25904064 PMCID: PMC4442642
34. Hammer, Neal D., Cassat, J.E., Noto, M.J., Lojek, L.J., Chadha, A.D., Schmitz, J.E., Creech, C. Buddy, and Eric P. Skaar. (2014) Inter- and intraspecies metabolite exchange promotes virulence of antibiotic-resistant Staphylococcus aureus. Cell Host & Microbe, 16: 531-7 PMID: 25299336 PMCID: PMC4197139
35. Thompson, M.K., Goodman, M., Keithly, M. E., Hammer, N.D., Cook, P., Jagessar, K.L., Harp, J., Skaar, Eric P., and Richard N. Armstrong. (2014) Structure and function of the genomically-encoded fosfomycin resistance enzyme, FosB, from Staphylococcus aureus. Biochemistry, 53:755-6. PMID: 24447055 PMCID: PMC3985756
36. Hammer, Neal D., Reniere, M.L., Cassat, J.E., Zhang, Y., Hirsch, A.O., Hood, M. Indriati, and Eric P. Skaar. (2013) Two heme-dependent terminal oxidases power Staphylococcus aureus organ specific colonization of the vertebrate host. MBio, 4(4): pii: e00241-13. PMID: 23900169 PMCID: PMC3735196
37. Cassat, J.E., Hammer, N.D., Campbell J.P., Benson M.A., Perrien D.S., Mrak L.N., Smeltzer M.S., Torres V.J., and Eric P. Skaar. (2013) A secreted bacterial protease tailors the Staphylococcus aureus virulence repertoire to modulate bone remodeling during osteomyelitis. Cell Host & Microbe. 13:759-72 PMID: 23768499 PMCID: PMC3721972
38. Mayfield, J.A., Hammer, N.D., Kurker R.C., Chen T.K., Ojha S., Skaar, Eric P., and Jennifer L. Dubois. (2013) The chlorite dismutase (HemQ) from Staphylococcus aureus has a redox-sensitive heme and is associated with the small colony variant phenotype. Journal of Biological Chemistry. 288:23488-504 PMID: 23737523 PMCID: PMC5395028
39. Hammer, Neal D. and Eric P. Skaar. (2013) Powerful genetic resource for the study of methicillin-resistant Staphylococcus aureus. MBio. 4 (2) PMID: 23549918 PMCID: PMC3622929
40. Wakeman Catherine.A., Hammer, N.D., Stauff D.L., Attia A.S., Anzaldi L.L., Dikalov S.I., Calcutt M.W., and Eric P. Skaar. (2012) Menaquinone biosynthesis potentiates haem toxicity in Staphylococcus aureus. Molecular Microbiology. 86:1376-92. PMID: 23043465 PMCID: PMC3524387
41. Attia, A.S., Schroeder, K.A., Wilson, K.J., Seeley, E.H., Hammer, N.D., Colvin, D.C., Gore, J.C., Caprioli, R.M., and Eric P. Skaar. (2012) Monitoring the inflammatory response to infection through the integration of MALDI IMS and MRI. Cell Host & Microbe, 11:664-73. PMID:22704626 PMCID: PMC3377982
42. Hammer, Neal, D., McGuffie, B.A., Zhou, Y., Badtke, M.P., Reinke, A.A., Brännström, K., Gestwicki, J.E., Olofsson, A., Almqvist, F., and Matthew R. Chapman. (2012) The C-terminal repeating units of CsgB direct bacterial functional amyloid nucleation. Journal of Molecular Biology, 422:376-89. PMID:22684146 PMCID: PMC3423549
43. Hammer, Neal D. and Eric P. Skaar. (2012) The impact of metal sequestration on Staphylococcus aureus metabolism. Invited Review: Current Opinions in Microbiology, 15:10-14. PMID: 22153710 PMCID: PMC3265625
44. Hammer, Neal D. and Eric P. Skaar. (2011) Molecular Mechanisms of Staphylococcus aureus Iron Acquisition. Invited Review: Annual Review of Microbiology, 65: 129-47. PMID: 21639791 PMCID: PMC3807827
45. Nenninger, A.A., Robinson, L.S., Hammer, N. D., Ashman Epstein, E.M., Badtke, M.P., Hultgren, S.J., and Matthew R. Chapman. (2011) CsgE is a curli specificity factor that prevents amyloid fiber polymerization. Molecular Microbiology, 81: 486-99. PMID: 21645131 PMCID: PMC3134098
46. Wang, X., Zhou, Y., Ren, J.J., Hammer, N.D., and Matthew R. Chapman. (2010) Gatekeeper residues modulate bacterial amyloid aggregation. Proceedings of the National Academy of Sciences, 107: 163-8. PMID: 19966296 PMCID: PMC2806774
47. Cegelske, L., Pinkner, J.S., Hammer, N. D., Cusumano, C.K., Hund, C.S., Chorell, E., Aberg, V., Walker, J.N., Seed, P.C., Almqvist, F., Chapman, Matthew R., and Scott J. Hultgren. (2009) Small- molecule inhibitors target E. coli amyloid biogenesis and biofilm formation. Nature Chemical Biology, 5: 913-9. PMID: 19915538 PMCID: PMC2838449
48. Badtke, M.P., Hammer, N.D., and Matthew R. Chapman. (2009) Functional amyloids signal their arrival Science Signaling, 2 pe43. Review. PMID: 19622831 PMCID: PMC2838484
49. Wang, X., Hammer, N.D., and Matthew R. Chapman. (2008) The molecular basis of functional bacterial amyloid polymerization and nucleation. Journal of Biological Chemistry, 283: 21530-21539. PMID: 18508760 PMCID: PMC2490784
50. Hammer, Neal D., Wang, Xuan., McGuffie B. A., and Matthew R. Chapman. (2008) Amyloids: Friend or Foe?. Journal of Alzheimer’s Disease, 13: 407-419. Review. PMID:18487849 PMCID: PMC2674399
51. Hammer, Neal D., Schmidt, J.C., and Matthew R. Chapman. (2007) The curli nucleator protein, CsgB, contains an amyloidogenic domain that directs the polymerization of CsgA. Proceedings of the National Academy of Sciences, 104: 12494-12499. PMID: 17636121 PMCID: PMC1941497
52. Bentz, B.G., Hammer, N.D., Milash, B., Klein, S., Burnett, D.M., Radosevich, James A., and G. Kenneth Haines 3rd. (2007) The kinetics and redox state of nitric oxide determine the biological consequences in lung adenocarcinoma. Tumour Biology. 28: 301-11. PMID: 18253068
53. Altman, K.W., Chhaya, V., Hammer, N.D., Pavlova, S., Vesper, B.J., Tao, L., and James A. Radosevich. (2008) Effect of proton pump inhibitor pantoprazole on growth and morpholgy or oral Lactobacillus strains. Laryngoscope. 118: 599-604. PMID: 18176340
54. Lee, S., Vesper, B.J., Zong, H., Hammer, N.D., Elseth, K.M., Barrett, A.G., Hoffman, B.M., and James A. Radosevich. (2008) Synthesis and biological analysis of thiotetra(ethylene glycol) monomethyl ether-functionalized porphyrazines: cellular uptake and light-dependent toxicity studies. Metal-Based Drugs. 2008:391418. PMID: 18274661 PMCID: PMC2225588
55. Vesper, B.J., Lee, S., Hammer, N.D., Elseth, K.M., Barrett, A.G., Hoffman, B.M., and James A. Radosevich. (2006) Developing a structure-function relationship for anionic porphyrazines exhibiting selective anti-tumor activity. Journal of Photochemical Photobiology. 82: 180-6. PMID: 16388964
56. Hammer, Neal D., Lee, S., Vesper, B.J., Elseth, K.M., Hoffman, B.M., Barrett, A.G.M., and James A. Radosevich. (2005) Charge dependence of cellular uptake and selective anti-tumor activity of porphyrazines. Journal of Medicinal Chemistry, 48: 8125-33. PMID: 16366594
57. Altman, K.W., Waltonen, J.D., Hammer, N.D., Radosevich, James A., and G. Kenneth Haines 3rd. (2005) Proton pump (H+/K+-ATPase) expression in human laryngeal seromucinous glands. Otolaryngology and Head Neck Surgery. 133: 718-24. PMID: 16274799
58. Bentz, B.G., Hammer, N.D., Radosevich, James A., and G. Kenneth Haines 3rd. (2004) Nitrosative stress induces DNA strand breaks but not caspase mediated apoptosis in a lung cancer cell line. Journal of Carcinogenesis. 3:16. PMCID: PMC544845
59. Altman, K.W., Haines, G.K. 3rd, Hammer, N.D., and James A. Radosevich. (2003) The H+/K+-ATPase (proton) pump is expressed in human laryngeal submucosal glands. Laryngoscope. 113: 1927-30. PMID: 14603049