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Dawn Quelle, PhD

Professor of Neuroscience and Pharmacology

Introduction

My research program investigates druggable mechanisms driving cancer with an emphasis on cell cycle and mitogenic signaling pathways (e.g., CDKs, RB1, ARF, p53, AKT, etc). Our efforts are currently focused on exploring the pathogenesis of two very different cancers – slowly growing neuroendocrine tumors (NETs) and aggressive malignant peripheral nerve sheath tumors (MPNSTs). NET patients generally live a long time following diagnosis due to the indolent nature of the disease, but more effective therapies are desperately needed once tumors become resistant to current treatments. By comparison, MPNSTs are deadly sarcomas in both children and adults, and sadly, there are no effective therapies for these patients.  

In our studies, we employ various model systems including cultured cells (normal and tumor-derived), mouse and pig cancer models, and human tumor specimens. Our research is interdisciplinary and collaborative, routinely involving interactions with other basic scientists, medical oncologists, surgical oncologists, endocrinologists, immunologists, human and veterinary pathologists, cancer geneticists, imaging experts, and bioinformaticians as well as biostatisticians. Our goal is to perform meaningful and innovative translational oncology that will improve therapies for cancer patients.

Current Positions

  • Professor of Neuroscience and Pharmacology
  • Professor of Pathology

Education

  • BS in Biochemistry, University of Maine, Orono
  • PhD in Molecular & Cell Biology, The Pennsylvania State University, University Park
  • Postdoctoral Fellow, Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN
  • Fellow, The Pennsylvania State University

Graduate Program Affiliations

Center, Program and Institute Affiliations

Research Interests

  • • New drug targets and combination therapies for treating sarcomas and neuroendocrine tumors (NETs)
  • • Factors that cooperate with loss of the INK4a/ARF (CDKN2A) tumor suppressor to promote NF1-associated tumor progression
  • • Improving immune checkpoint inhibitor therapies in immunologically “cold” tumors like sarcomas and pancreatic NETs
  • • Role of plasma cells in antitumor immunity

Selected Publications

  • Shilyansky JS, Chan CJ, Xiao S, Gribovskaja-Rupp I, Quelle DE, Howe JR, Dillon JS, and Ear PH. GLP-1R agonist promotes proliferation of neuroendocrine neoplasm cells expressing GLP-1 receptors. Surgery 179:108943, 2025. DOI: 10.1016/j.surg.2024.09.052. PMID: 39665969
  • Lingo JJ, Voigt E, and Quelle DE. Linking FOXM1 and PD-L1 to CDK4/6-MEK targeted therapy resistance in malignant peripheral nerve sheath tumors. Oncotarget 15:638-643, 2024. DOI: 10.18632/oncotarget.28650. PMCID: PMC11441412
  • Vaughn H, Major H, Kadera E, Keck K, Dunham T, Qian Q, Brown B, Scott A, Bellizzi AM, Braun T, Breheny P, Quelle DE, Howe JR, and Darbro B. Functional copy-number alterations as diagnostic and prognostic biomarkers in neuroendocrine tumors. Int J Mol Sci. 25(14):7532, 2024. DOI: 10.3390/ijms25147532. PMCID: PMC11277019
  • Kohlmeyer JL, Lingo JJ, Kaemmer CA, Scherer A, Warrier A, Voigt E,Raygoza Garay JA, McGivney GR, Brockman QR, Tang A, Calizo A, Pollard K, Zhang X, Hirbe AC, Pratilas CA, Leidinger M, Breheny P, Chimenti MS, Sieren JC, Monga V, Tanas MR, Meyerholz DK, Darbro BW, Dodd RD, Quelle DE. (2023) CDK4/6=MEK Inhibition in MPNSTs Causes Plasma Cell Infiltration, Sensitization to PD-L1 Blockade, and Tumor Regression. Clin Cancer Res. Sep 1; 29(17):3484-3497. DOI: 10.1158/1078-0432.CCR-23-0749. PMID: 37410426. PMCID: PMC10528807.
  • Maharjan CK, Umesalma S, Kaemmer CA, Muniz VP, Bauchle C, Mott SL, Zamba KD, Breheny P, Leidinger MR, Darbro BW, Stephens SB, Meyerholz DK, and Quelle DE: RABL6A promotes pancreatic neuroendocrine tumor angiogenesis and progression in vivo. Biomedicines 9(2):633, 2021. https://doi.org/10.3390/biomedicines9060633 PMCID: PMC8228095
  • Kohlmeyer JL, Kaemmer CA, Umesalma S, Gourronc FA, Klingelhutz AJ, and Quelle DE: RABL6A regulates Schwann cell senescence in an RB1-dependent manner. Int J Mol Sci 22(10):5367, 2021. https://doi.org/10.3390/ijms22105367. PMCID: PMC8161079
  • Kaemmer CA, Umesalma S, Maharjan CK, Moose DL, Narla G, Mott SL, Zamba GKD, Breheny P, Darbro BW, Bellizzi AM, Henry MD, and Quelle DE: Development and comparison of novel bioluminescent mouse models of pancreatic neuroendocrine neoplasm metastasis. Sci Rep 11(1):10252, 2021. https://doi.org/10.1038/s41598-021-89866-1. PMCID: PMC8119958
  • Scott AT, Weitz M, Breheny PJ, Ear PH, Darbro B, Brown BJ, Braun TA, Li G, Umesalma S, Kaemmer CA, Maharjan CK, Quelle DE, Bellizzi AM, Chandrasekharan C, Dillon JS, O’Dorisio TM, and Howe JR. Gene Expression signatures identify novel therapeutics for metastatic pancreatic neuroendocrine tumors. Clin Cancer Res 26(8):2011-2021, 2020. https://doi.org/10.1158/1078-0432.ccr-19-2884. PMCID: PMC7165057
  • Kohlmeyer JL, Kaemmer CA, Pulliam C, Maharjan CK, Moreno Samayoa A, Major H, Cornick K, Knepper-Adrian V, Khanna R, Sieren JC, Leidinger MR, Meyerholz DK, Zamba G, Weimer JM, Dodd RD, Darbro BW, Tanas MR, and Quelle DE: RABL6A is an essential driver of MPNSTs that negatively regulates the RB1 pathway and sensitizes tumor cells to CDK4/6 inhibitors. Clin Cancer Res 26(12):2997-3011, 2020.
  • Umesalma S, Kaemmer CA, Kohlmeyer JL, Letney B, Schab AM, Reilly JA, Sheehy RM, Hagen J, Tiwari N, Zhan F, Leidinger MR, O’Dorisio TM, Dillon J, Merrill RA, Meyerholz DK, Perl AL, Brown BJ, Braun TA, Scott AT, Ginader T, Taghiyev AF, Zamba GK, Howe JR, Strack S, Bellizzi AM, Narla G, Darbro BW, Quelle FW, and Quelle DE.:  RABL6A inhibits tumor suppressive PP2A/AKT signaling to drive pancreatic neuroendocrine tumor growth. J Clin Invest 129(4):1641-1653, 2019. https://doi.org/10.1172/jci123049. PMCID: PMC6436899