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Bruce e. Mickey

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https://www.readbyqxmd.com/read/28833542/echo-planar-spectroscopic-imaging-with-dual-readout-alternated-gradients-drag-epsi-at-7-t-application-for-2-hydroxyglutarate-imaging-in-glioma-patients
#1
Zhongxu An, Vivek Tiwari, Sandeep K Ganji, Jeannie Baxter, Michael Levy, Marco C Pinho, Edward Pan, Elizabeth A Maher, Toral R Patel, Bruce E Mickey, Changho Choi
PURPOSE: To develop echo-planar spectroscopic imaging (EPSI) with large spectral width and accomplish high-resolution imaging of 2-hydroxyglutarate (2HG) at 7 T. METHODS: We designed a new EPSI readout scheme at 7 T. Data were recorded with dual-readout alternated gradients and combined according to the gradient polarity. Following validation of its performance in phantoms, the new readout scheme, together with previously reported 2HG-optimized magnetic resonance spectroscopy (point-resolved spectroscopy echo time of 78 ms), was used for time-efficient and high-resolution imaging of 2HG and other metabolites in five glioma patients before treatment...
August 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28725519/intracranial-hemangiopericytomas-recurrence-metastasis-and-radiotherapy
#2
Ankur R Patel, Bruno C Flores, Vin Shen Ban, Kimmo J Hatanpaa, Bruce E Mickey, Samuel L Barnett
Background  Intracranial hemangiopericytomas (HPCs) are characterized by high recurrence rates and extracranial metastases. Radiotherapy provides an adjunct to surgery, but the timing of therapy and the patients most likely to benefit remain unclear. Methods  A retrospective review of 20 patients with HPC treated at the University of Texas Southwestern Medical Center between 1985 and 2014 was conducted. Recurrence and metastasis rates along with overall survival (OS) were characterized based on therapeutic approach and tumor pathology using Kaplan-Meier and Cox regression analyses...
August 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28548710/measurement-of-glycine-in-healthy-and-tumorous-brain-by-triple-refocusing-mrs-at-3%C3%A2-t-in-vivo
#3
Vivek Tiwari, Zhongxu An, Sandeep K Ganji, Jeannie Baxter, Toral R Patel, Edward Pan, Bruce E Mickey, Elizabeth A Maher, Marco C Pinho, Changho Choi
Glycine (Gly) has been implicated in several neurological disorders, including malignant brain tumors. The precise measurement of Gly is challenging largely as a result of the spectral overlap with myo-inositol (mI). We report a new triple-refocusing sequence for the reliable co-detection of Gly and mI at 3 T and for the evaluation of Gly in healthy and tumorous brain. The sequence parameters were optimized with density-matrix simulations and phantom validation. With a total TE of 134 ms, the sequence gave complete suppression of the mI signal between 3...
September 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28248126/prospective-longitudinal-analysis-of-2-hydroxyglutarate-magnetic-resonance-spectroscopy-identifies-broad-clinical-utility-for-the-management-of-patients-with-idh-mutant-glioma
#4
Changho Choi, Jack M Raisanen, Sandeep K Ganji, Song Zhang, Sarah S McNeil, Zhongxu An, Akshay Madan, Kimmo J Hatanpaa, Vamsidhara Vemireddy, Christie A Sheppard, Dwight Oliver, Keith M Hulsey, Vivek Tiwari, Tomoyuki Mashimo, James Battiste, Samuel Barnett, Christopher J Madden, Toral R Patel, Edward Pan, Craig R Malloy, Bruce E Mickey, Robert M Bachoo, Elizabeth A Maher
Purpose Proton magnetic resonance spectroscopy (MRS) of the brain can detect 2-hydroxyglutarate (2HG), the oncometabolite produced in neoplasms harboring a mutation in the gene coding for isocitrate dehydrogenase ( IDH). We conducted a prospective longitudinal imaging study to determine whether quantitative assessment of 2HG by MRS could serve as a noninvasive clinical imaging biomarker for IDH-mutated gliomas. Patients and Methods 2HG MRS was performed in 136 patients using point-resolved spectroscopy at 3 T in parallel with standard clinical magnetic resonance imaging and assessment...
November 20, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28122245/oncogenes-activate-an-autonomous-transcriptional-regulatory-circuit-that-drives-glioblastoma
#5
Dinesh K Singh, Rahul K Kollipara, Vamsidara Vemireddy, Xiao-Li Yang, Yuxiao Sun, Nanda Regmi, Stefan Klingler, Kimmo J Hatanpaa, Jack Raisanen, Steve K Cho, Shyam Sirasanagandla, Suraj Nannepaga, Sara Piccirillo, Tomoyuki Mashimo, Shan Wang, Caroline G Humphries, Bruce Mickey, Elizabeth A Maher, Hongwu Zheng, Ryung S Kim, Ralf Kittler, Robert M Bachoo
Efforts to identify and target glioblastoma (GBM) drivers have primarily focused on receptor tyrosine kinases (RTKs). Clinical benefits, however, have been elusive. Here, we identify an SRY-related box 2 (SOX2) transcriptional regulatory network that is independent of upstream RTKs and capable of driving glioma-initiating cells. We identified oligodendrocyte lineage transcription factor 2 (OLIG2) and zinc-finger E-box binding homeobox 1 (ZEB1), which are frequently co-expressed irrespective of driver mutations, as potential SOX2 targets...
January 24, 2017: Cell Reports
https://www.readbyqxmd.com/read/27454352/detection-of-2-hydroxyglutarate-in-brain-tumors-by-triple-refocusing-mr-spectroscopy-at-3t-in-vivo
#6
Zhongxu An, Sandeep K Ganji, Vivek Tiwari, Marco C Pinho, Toral Patel, Samuel Barnett, Edward Pan, Bruce E Mickey, Elizabeth A Maher, Changho Choi
PURPOSE: To test the efficacy of triple-refocusing MR spectroscopy (MRS) for improved detection of 2-hydroxyglutarate (2HG) in brain tumors at 3T in vivo. METHODS: The triple-refocusing sequence parameters were tailored at 3T, with density-matrix simulations and phantom validation, for enhancing the 2HG 2.25-ppm signal selectivity with respect to the adjacent resonances of glutamate (Glu), glutamine (Gln), and gamma-aminobutyric acid (GABA). In vivo MRS data were acquired from 15 glioma patients and analyzed with LCModel using calculated basis spectra...
July 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/26991680/in-vivo-detection-of-2-hydroxyglutarate-in-brain-tumors-by-optimized-point-resolved-spectroscopy-press-at-7t
#7
Sandeep K Ganji, Zhongxu An, Vivek Tiwari, Sarah McNeil, Marco C Pinho, Edward Pan, Bruce E Mickey, Elizabeth A Maher, Changho Choi
PURPOSE: To test the efficacy of 7T MRS for in vivo detection of 2-hydroxyglutarate (2HG) in brain tumors. METHODS: The subecho times of point-resolved spectroscopy (PRESS) were optimized at 7T with density-matrix simulations and phantom validation to improve the 2HG signal selectivity with respect to the neighboring resonances of γ-aminobutyric acid (GABA), glutamate (Glu), and glutamine (Gln). MRS data were acquired from 12 subjects with gliomas in vivo and analyzed with LCModel using calculated basis spectra...
March 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/26966096/pre-treatment-factors-associated-with-detecting-additional-brain-metastases-at-stereotactic-radiosurgery
#8
Zabi Wardak, Alexander Augustyn, Hong Zhu, Bruce E Mickey, Louis A Whitworth, Christopher J Madden, Samuel L Barnett, Ramzi E Abdulrahman, Lucien A Nedzi, Robert D Timmerman, Kevin S Choe
The number of brain metastases identified on diagnostic magnetic resonance imaging (MRI) is a key factor in consideration of stereotactic radiosurgery (SRS). However, additional lesions are often detected on high-resolution SRS-planning MRI. We investigated pre-treatment clinical characteristics that are associated with finding additional metastases at SRS. Patients treated with SRS for brain metastases between the years of 2009-2014 comprised the study cohort. All patients underwent frame-fixed, 1 mm thick MRI on the day of SRS...
June 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/26710031/intracranial-facial-nerve-grafting-in-the-setting-of-skull-base-tumors-global-and-regional-facial-function-analysis-and-possible-implications-for-facial-reanimation-surgery
#9
Shai M Rozen, Bridget L Harrison, Brandon Isaacson, J Walter Kutz, Peter S Roland, Patricia A Blau, Samuel L Barnett, Bruce E Mickey
BACKGROUND: Reconstructive surgeons may encounter patients presenting after intracranial facial nerve resection and grafting in the setting of skull base tumors, who inquire regarding progression, final facial function, and need for future operations. Study goals were to analyze global and regional facial function using established grading systems and videography, while examine variables possibly affecting outcomes. METHODS: Between 1997 and 2012, 28 patients underwent intracranial nerve grafting...
January 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/26574671/clinical-outcome-of-silent-subtype-iii-pituitary-adenomas-diagnosed-by-immunohistochemistry
#10
Timothy E Richardson, Derek A Mathis, Bruce E Mickey, Jack M Raisanen, Dennis K Burns, Charles L White, Kimmo J Hatanpaa
Silent subtype III pituitary adenomas (SS-3) are nonfunctioning radiosensitive adenomas that may be associated with an increased risk of recurrence and invasion. The features that have been proposed to be diagnostically important are identifiable by electron microscopy (EM) and include an enlarged Golgi apparatus, along with several other ultrastructural features. The often limited availability of EM and the uncertainty about the relative importance of individual features pose practical challenges to the diagnosis...
December 2015: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/26375325/the-role-of-age-in-intracerebral-hemorrhages
#11
REVIEW
Elvis Camacho, Melissa A LoPresti, Sam Bruce, Derek Lin, Mickey Abraham, Geoff Appelboom, Blake Taylor, Michael McDowell, Byron DuBois, Mihika Sathe, E Sander Connolly
We aimed to identify the role of age in intracerebral hemorrhage (ICH), as well as characterize the most commonly used age cut off points in the literature, with the hope of understanding and guiding treatment. Strokes are one of the leading causes of death in the USA, and ICH is the deadliest type. Age is a strong risk factor, but it also affects the body in numerous ways, including changes to the cardiovascular and central nervous systems that interplay with the multiple risk factors for ICH. Understanding the role of age in risk and outcomes of ICH can guide treatment and future clinical trials...
December 2015: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/25769250/influence-on-morbidity-and-mortality-of-neoadjuvant-radiation-and-chemotherapy-among-cranial-malignancy-patients-in-the-postoperative-setting
#12
Paul Narayan Hein, Bryan Lieber, Eliza Bruce, Blake Taylor, Geoffrey Appelboom, Mickey Abraham, E Sander Connolly
We sought to assess the impact of neoadjuvant therapy on 30 day mortality and morbidity using data from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP). Chemotherapy and radiotherapy are both often indicated for treatment of cranial or systemic malignancy but can have significant adverse effects in the postsurgical setting. Data from 2006 to 2012 were obtained from the national ACS-NSQIP database. A total of 1044 patients were identified who obtained surgery for removal of metastatic brain tumors, of whom 127 received neoadjuvant chemotherapy and 65 neoadjuvant radiotherapy...
June 2015: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/25525878/acetate-is-a-bioenergetic-substrate-for-human-glioblastoma-and-brain-metastases
#13
Tomoyuki Mashimo, Kumar Pichumani, Vamsidhara Vemireddy, Kimmo J Hatanpaa, Dinesh Kumar Singh, Shyam Sirasanagandla, Suraj Nannepaga, Sara G Piccirillo, Zoltan Kovacs, Chan Foong, Zhiguang Huang, Samuel Barnett, Bruce E Mickey, Ralph J DeBerardinis, Benjamin P Tu, Elizabeth A Maher, Robert M Bachoo
Glioblastomas and brain metastases are highly proliferative brain tumors with short survival times. Previously, using (13)C-NMR analysis of brain tumors resected from patients during infusion of (13)C-glucose, we demonstrated that there is robust oxidation of glucose in the citric acid cycle, yet glucose contributes less than 50% of the carbons to the acetyl-CoA pool. Here, we show that primary and metastatic mouse orthotopic brain tumors have the capacity to oxidize [1,2-(13)C]acetate and can do so while simultaneously oxidizing [1,6-(13)C]glucose...
December 18, 2014: Cell
https://www.readbyqxmd.com/read/25232478/smart-wearable-body-sensors-for-patient-self-assessment-and-monitoring
#14
Geoff Appelboom, Elvis Camacho, Mickey E Abraham, Samuel S Bruce, Emmanuel Lp Dumont, Brad E Zacharia, Randy D'Amico, Justin Slomian, Jean Yves Reginster, Olivier Bruyère, E Sander Connolly
BACKGROUND: Innovations in mobile and electronic healthcare are revolutionizing the involvement of both doctors and patients in the modern healthcare system by extending the capabilities of physiological monitoring devices. Despite significant progress within the monitoring device industry, the widespread integration of this technology into medical practice remains limited. The purpose of this review is to summarize the developments and clinical utility of smart wearable body sensors...
2014: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/24616497/in-vivo-chemical-exchange-saturation-transfer-imaging-allows-early-detection-of-a-therapeutic-response-in-glioblastoma
#15
COMPARATIVE STUDY
Koji Sagiyama, Tomoyuki Mashimo, Osamu Togao, Vamsidhara Vemireddy, Kimmo J Hatanpaa, Elizabeth A Maher, Bruce E Mickey, Edward Pan, A Dean Sherry, Robert M Bachoo, Masaya Takahashi
Glioblastoma multiforme (GBM), which account for more than 50% of all gliomas, is among the deadliest of all human cancers. Given the dismal prognosis of GBM, it would be advantageous to identify early biomarkers of a response to therapy to avoid continuing ineffective treatments and to initiate other therapeutic strategies. The present in vivo longitudinal study in an orthotopic mouse model demonstrates quantitative assessment of early treatment response during short-term chemotherapy with temozolomide (TMZ) by amide proton transfer (APT) imaging...
March 25, 2014: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/24289120/the-far-lateral-approach-for-foramen-magnum-meningiomas
#16
REVIEW
Bruno C Flores, Benjamin P Boudreaux, Daniel R Klinger, Bruce E Mickey, Samuel L Barnett
Foramen magnum meningiomas (FMMs) are slow growing, most often intradural and extramedullary tumors that pose significant challenges to the skull base neurosurgeon. The indolent clinical course of FMMs and their insidious onset of symptoms are important factors that contribute to delayed diagnosis and relative large size at the time of presentation. Symptoms are often produced by compression of surrounding structures (such as the medulla oblongata, upper cervical spinal cord, lower cranial nerves, and vertebral artery) within a critically confined space...
December 2013: Neurosurgical Focus
https://www.readbyqxmd.com/read/24263249/advancing-social-and-economic-development-by-investing-in-women-s-and-children-s-health-a-new-global-investment-framework
#17
Karin Stenberg, Henrik Axelson, Peter Sheehan, Ian Anderson, A Metin Gülmezoglu, Marleen Temmerman, Elizabeth Mason, Howard S Friedman, Zulfiqar A Bhutta, Joy E Lawn, Kim Sweeny, Jim Tulloch, Peter Hansen, Mickey Chopra, Anuradha Gupta, Joshua P Vogel, Mikael Ostergren, Bruce Rasmussen, Carol Levin, Colin Boyle, Shyama Kuruvilla, Marjorie Koblinsky, Neff Walker, Andres de Francisco, Nebojsa Novcic, Carole Presern, Dean Jamison, Flavia Bustreo
A new Global Investment Framework for Women's and Children's Health demonstrates how investment in women's and children's health will secure high health, social, and economic returns. We costed health systems strengthening and six investment packages for: maternal and newborn health, child health, immunisation, family planning, HIV/AIDS, and malaria. Nutrition is a cross-cutting theme. We then used simulation modelling to estimate the health and socioeconomic returns of these investments. Increasing health expenditure by just $5 per person per year up to 2035 in 74 high-burden countries could yield up to nine times that value in economic and social benefits...
April 12, 2014: Lancet
https://www.readbyqxmd.com/read/23350780/intracranial-phosphaturic-mesenchymal-tumors-report-of-2-cases
#18
REVIEW
Derek A Mathis, Edward J Stehel, Joseph E Beshay, Bruce E Mickey, Andrew L Folpe, Jack Raisanen
Hypophosphatemia with osteomalacia may be due to a neoplasm that produces fibroblast growth factor 23 (FGF-23), which inhibits phosphate reabsorption in the kidneys. Most of these tumors occur in bone or soft tissue and occasionally in the head, although intracranial occurrence is very rare. This report describes a tumor that caused hypophosphatemia and osteomalacia and was located entirely in the right anterior cranial fossa. Radiologically, the tumor resembled a meningioma; histologically, it was a low-grade phosphaturic mesenchymal tumor, mixed connective tissue variant (PMTMCT)...
April 2013: Journal of Neurosurgery
https://www.readbyqxmd.com/read/22682223/analysis-of-tumor-metabolism-reveals-mitochondrial-glucose-oxidation-in-genetically-diverse-human-glioblastomas-in-the-mouse-brain-in-vivo
#19
Isaac Marin-Valencia, Chendong Yang, Tomoyuki Mashimo, Steve Cho, Hyeonman Baek, Xiao-Li Yang, Kartik N Rajagopalan, Melissa Maddie, Vamsidhara Vemireddy, Zhenze Zhao, Ling Cai, Levi Good, Benjamin P Tu, Kimmo J Hatanpaa, Bruce E Mickey, José M Matés, Juan M Pascual, Elizabeth A Maher, Craig R Malloy, Ralph J Deberardinis, Robert M Bachoo
Dysregulated metabolism is a hallmark of cancer cell lines, but little is known about the fate of glucose and other nutrients in tumors growing in their native microenvironment. To study tumor metabolism in vivo, we used an orthotopic mouse model of primary human glioblastoma (GBM). We infused (13)C-labeled nutrients into mice bearing three independent GBM lines, each with a distinct set of mutations. All three lines displayed glycolysis, as expected for aggressive tumors. They also displayed unexpected metabolic complexity, oxidizing glucose via pyruvate dehydrogenase and the citric acid cycle, and using glucose to supply anaplerosis and other biosynthetic activities...
June 6, 2012: Cell Metabolism
https://www.readbyqxmd.com/read/22673264/the-first-72-hours-of-brain-tissue-oxygenation-predicts-patient-survival-with-traumatic-brain-injury
#20
COMPARATIVE STUDY
Evert A Eriksson, Jeffrey F Barletta, Bryan E Figueroa, Bruce W Bonnell, Chris A Sloffer, Wayne E Vanderkolk, Karen J McAllen, Mickey Ott
BACKGROUND: Utilization of brain tissue oxygenation (pBtO(2)) is an important but controversial variable in the treatment of traumatic brain injury. We hypothesize that pBtO(2) values over the first 72 hours of monitoring are predictive of mortality. METHODS: Consecutive, adult patients with severe traumatic brain injury and pBtO(2) monitors were retrospectively identified. Time-indexed measurements of pBtO(2), cerebral perfusion pressure (CPP), and intracranial pressure (ICP) were collected, and average values over 4-hour blocks were determined...
May 2012: Journal of Trauma and Acute Care Surgery
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