Neurosurgical Oncology Unit

The Neurosurgical Oncology Unit aims to develop novel therapeutics for Glioblastoma (GBM)–the most common primary malignant CNS. Despite aggressive management with maximal surgical resection, radiation, and chemotherapy, median and 5-year survival rates remain low (15 months and 5.6%, respectively). Tumor-specific contributors to treatment failure include cellular and genetic heterogeneity and a highly immunosuppressive tumor microenvironment. GBMs also harbor self-renewing, tumorigenic glioma stem-like cells (GSCs) that contribute to tumor initiation, maintenance, and recurrence. The need for novel GBM therapeutic strategies is urgent.

Image
Figure 1. Fluorescence microscopy of GBM cell line stained with DAPI (blue); ARL13-B (red) and acetylated--tubulin. Short, morphologically abnormal primary cilia are associated with most nuclei. Magnification: 40X
Figure 1. Fluorescence microscopy of GBM cell line stained with DAPI (blue); ARL13-B (red) and acetylated-a-tubulin. Short, morphologically abnormal primary cilia are associated with most nuclei. Magnification: 40X

The role of primary cilia in cancer has garnered attention over the last decade and provides opportunities for the development of novel therapeutic strategies. Primary cilia are non-motile, highly conserved microtubule-based organelles that project from the cytoplasmic membrane in a single copy from virtually all mammalian cells. The organelle is required for several key signal transduction cascades implicated in cancer. While GBM cells show aberrant ciliogenesis and downregulation of cilia-related genes, functional, mature primary cilia are present in GBM cell lines and biopsies (Figure 1).

Investigations into the functional significance of primary cilia in GBM tumorigenesis is in a nascent stage. A deeper understanding of the specific signaling cascades and mechanisms regulating ciliogenesis in GBM and their impact on proliferation, invasion, treatment resistance, and immunosuppression is critical to moving the field forward and developing a potentially new paradigm of effective, “cilia-centric” therapeutic strategies. This is the overarching aim of our group.

Lab Members:


Selected Publications

2022


Vivas-Buitrago T, Domingo RA, Tripathi S, De Biase G, Brown D, Akinduro OO, Ramos-Fresnedo A, Sabsevitz DS, Bendok BR, Sherman W, Parney IF, Jentoft ME, Middlebrooks EH, Meyer FB, Chaichana KL, Quinones-Hinojosa A (2022)
Influence of supramarginal resection on survival outcomes after gross-total resection of IDH-wild-type glioblastoma.
J Neurosurg, 136:1-8. PubMed ID: 34087795

2021


Himes BT, Geiger PA, Ayasoufi K, Bhargav AG, Brown DA, Parney IF (2021)
Immunosuppression in Glioblastoma: Current Understanding and Therapeutic Implications.
Front Oncol, 11:770561. PubMed ID: 34778089

Renfrow JJ, Julian BQ, Brown DA, Tatter SB, Laxton AW, Lesser GJ, Strowd RE, Parney IF (2021)
A Review on the Surgical Management of Insular Gliomas.
Can J Neurol Sci,:1-9. PubMed ID: 34711299

Brown DA, Goyal A, Richter KR, Haglin JM, Himes BT, Lu VM, Snyder K, Hughes J, Decker PA, Opoku-Darko M, Link MJ, Burns TC, Parney IF (2022)
Clinical utility of brain biopsy for presumed CNS relapse of systemic lymphoma.
J Neurosurg, 136:30-39. PubMed ID: 34214988

Munoz-Casabella A, Alvi MA, Rahman M, Burns TC, Brown DA (2021)
Laser Interstitial Thermal Therapy for Recurrent Glioblastoma: Pooled Analyses of Available Literature.
World Neurosurg, 153:91-97.e1. PubMed ID: 34087459

2020


Brown DA, Goyal A, Kerezoudis P, Alvi MA, Himes BT, Bydon M, Van Gompel JJ, Chaichana KL, Quiñones-Hinojosa A, Burns TC, Yan E, Parney IF (2020)
Adjuvant radiation for WHO grade II and III intracranial meningiomas: insights on survival and practice patterns from a National Cancer Registry.
J Neurooncol, 149:293-303. PubMed ID: 32860156

Brown DA, Goyal A, Kerezoudis P, Alvi MA, Himes BT, Bydon M, Van Gompel JJ, Chaichana KL, Quiñones-Hinojosa A, Burns TC, Yan E, Parney IF (2020)
Adjuvant radiation for WHO grade II and III intracranial meningiomas: insights on survival and practice patterns from a National Cancer Registry.
J Neurooncol, 149:293-303. PubMed ID: 32860156

Brown DA, Goyal A, Takami H, Graffeo CS, Mahajan A, Krauss WE, Bydon M (2020)
Radiotherapy in addition to surgical resection may not improve overall survival in WHO grade II spinal ependymomas.
Clin Neurol Neurosurg, 189:105632. PubMed ID: 31862631

Brown DA, Lu VM, Himes BT, Burns TC, Quiñones-Hinojosa A, Chaichana KL, Parney IF (2020)
Breast brain metastases are associated with increased risk of leptomeningeal disease after stereotactic radiosurgery: a systematic review and meta-analysis.
Clin Exp Metastasis, 37:341-352. PubMed ID: 31950392

Brown DA, Hanalioglu S, Chaichana K, Duffau H (2020)
Transcorticosubcortical Approach for Left Posterior Mediobasal Temporal Region Gliomas: A Case Series and Anatomic Review of Relevant White Matter Tracts.
World Neurosurg, 139:e737-e747. PubMed ID: 32360919

Himes BT, Arnett AL, Merrell KW, Gates MJ, Bhargav AG, Raghunathan A, Brown DA, Burns TC, Parney IF (2020)
Glioblastoma Recurrence Versus Treatment Effect in a Pathology-Documented Series.
Can J Neurol Sci, 47:525-530. PubMed ID: 32077389

2019


Goyal A, Yolcu YU, Goyal A, Kerezoudis P, Brown DA, Graffeo CS, Goncalves S, Burns TC, Parney IF (2019)
The T2-FLAIR-mismatch sign as an imaging biomarker for IDH and 1p/19q status in diffuse low-grade gliomas: a systematic review with a Bayesian approach to evaluation of diagnostic test performance.
Neurosurg Focus, 47:E13. PubMed ID: 31786548

Lu VM, Kerezoudis P, Brown DA, Burns TC, Quinones-Hinojosa A, Chaichana KL (2019)
Hypofractionated versus standard radiation therapy in combination with temozolomide for glioblastoma in the elderly: a meta-analysis.
J Neurooncol, 143:177-185. PubMed ID: 30919157

Navarro-Bonnet J, Suarez-Meade P, Brown DA, Chaichana KL, Quinones-Hinojosa A (2019)
Following the light in glioma surgery: a comparison of sodium fluorescein and 5-aminolevulinic acid as surgical adjuncts in glioma resection.
J Neurosurg Sci, 63:633-647. PubMed ID: 31961116

Rinaldo L, Brown DA, Bhargav AG, Rusheen AE, Naylor RM, Gilder HE, Monie DD, Youssef SJ, Parney IF (2019)
Venous thromboembolic events in patients undergoing craniotomy for tumor resection: incidence, predictors, and review of literature.
J Neurosurg, 132:10-21. PubMed ID: 30611138

2018


Brown DA, Himes BT, Kerezoudis P, Chilinda-Salter YM, Grewal SS, Spear JA, Bydon M, Burns TC, Parney IF (2018)
Insurance correlates with improved access to care and outcome among glioblastoma patients.
Neuro Oncol, 20:1374-1382. PubMed ID: 29893906