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Eckert MA, Benitez A, Soler ZM, Dubno JR, Schlosser RJ. Gray matter and episodic memory associations with olfaction in middle-aged to older adults. Int Forum Allergy Rhinol 2024; 14:961-971. [PMID: 37897207 PMCID: PMC11045322 DOI: 10.1002/alr.23290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/18/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023]
Abstract
BACKGROUND Age-related declines in olfaction contribute to low quality of life and appear to occur with declines in cognitive function, including diminished episodic memory. We tested the hypothesis that low gray matter volume within cortical regions that support olfaction and episodic memory can explain age-related differences in olfactory and episodic memory functions. METHODS T1-weighted images, Sniffin' Sticks olfactory measures, and the NIH Toolbox-Cognition Battery were administered to 131 middle-aged to older adults (50-86 years; 66% female). Correlation was used to examine the associations between these measures. A network-based image processing approach was then used to examine the degree to which spatial patterns of gray matter variance were related to the olfactory and cognitive measures. Structural equation modeling was used to characterize the relative specificity of olfactory, cognitive, gray matter, and aging associations. RESULTS Olfactory threshold, discrimination, and identification exhibited small to medium effect size associations with episodic memory performance (rs = 0.27-0.42, ps < 0.002). Gray matter volume within medial temporal and orbitofrontal cortex was also related to olfactory (discrimination and identification) and episodic memory function (rs = 0.21-0.36, ps < 0.019). Age and episodic memory explained the same variance in olfaction that was explained by the medial temporal and orbitofrontal pattern of gray matter volume. CONCLUSIONS The results of this cross-sectional study suggest that identifying mechanisms contributing to differences in medial temporal and orbitofrontal cortex will advance our understanding of co-morbid olfactory and cognitive declines.
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Affiliation(s)
- Mark A. Eckert
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina
| | | | - Zachary M. Soler
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina
| | - Judy R. Dubno
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina
| | - Rodney J. Schlosser
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina
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2
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Eckert MA, Vaden KI, Paracchini S. Auditory Cortex Asymmetry Associations with Individual Differences in Language and Cognition. Brain Sci 2023; 14:14. [PMID: 38248230 PMCID: PMC10813516 DOI: 10.3390/brainsci14010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/14/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
A longstanding cerebral lateralization hypothesis predicts that disrupted development of typical leftward structural asymmetry of auditory cortex explains why children have problems learning to read. Small sample sizes and small effects, potential sex-specific effects, and associations that are limited to specific dimensions of language are thought to have contributed inconsistent results. The large ABCD study dataset (baseline visit: N = 11,859) was used to test the hypothesis of significant associations between surface area asymmetry of auditory cortex and receptive vocabulary performance across boys and girls, as well as an oral word reading effect that was specific to boys. The results provide modest support (Cohen's d effect sizes ≤ 0.10) for the cerebral lateralization hypothesis.
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Grants
- U01 DA051039 NIDA NIH HHS
- U01 DA041120 NIDA NIH HHS
- R01 HD069374 NICHD NIH HHS
- U01 DA051018 NIDA NIH HHS
- U01 DA041093 NIDA NIH HHS
- U24 DA041123 NIDA NIH HHS
- U01 DA051038 NIDA NIH HHS
- U01 DA051037 NIDA NIH HHS
- U01 DA051016 NIDA NIH HHS
- U01 DA041106 NIDA NIH HHS
- U01 DA041117 NIDA NIH HHS
- U01 DA041148 NIDA NIH HHS
- U24 DA041147 NIDA NIH HHS
- C06 RR014516 NCRR NIH HHS
- U01 DA041134 NIDA NIH HHS
- U01 DA041022 NIDA NIH HHS
- U01 DA041156 NIDA NIH HHS
- U01 DA050987 NIDA NIH HHS
- U01 DA041025 NIDA NIH HHS
- U01 DA050989 NIDA NIH HHS
- U01 DA041089 NIDA NIH HHS
- U01 DA050988 NIDA NIH HHS
- U01 DA041028 NIDA NIH HHS
- U01 DA041048 NIDA NIH HHS
- U01 DA041174 NIDA NIH HHS
- U01DA041048, 273 U01DA050989, U01DA051016, U01DA041022, U01DA051018, U01DA051037, U01DA050987, 274 U01DA041174, U01DA041106, U01DA041117, U01DA041028, U01DA041134, U01DA050988, 275 U01DA051039, U01DA041156, U01DA041025, U01DA041120, U01DA051038, U01DA0411 NIH HHS
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Affiliation(s)
- Mark A. Eckert
- Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - Kenneth I. Vaden
- Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - Silvia Paracchini
- School of Medicine, University of St. Andrews, North Haugh, St. Andrews KY16 9TF, UK;
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3
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Bhandari R, Phatangare RV, Eckert MA, Vaden KI, Wang JZ. Dyslexia Data Consortium Repository: A Data Sharing and Delivery Platform for Research. Brain Inform (2023) 2023; 13974:167-178. [PMID: 38352916 PMCID: PMC10859776 DOI: 10.1007/978-3-031-43075-6_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Specific learning disability of reading, or dyslexia, affects 5-17% of the population in the United States. Research on the neurobiology of dyslexia has included studies with relatively small sample sizes across research sites, thus limiting inference and the application of novel methods, such as deep learning. To address these issues and facilitate open science, we developed an online platform for data-sharing and advanced research programs to enhance opportunities for replication by providing researchers with secondary data that can be used in their research (https://www.dyslexiadata.org). This platform integrates a set of well-designed machine learning algorithms and tools to generate secondary datasets, such as cortical thickness, as well as regional brain volume metrics that have been consistently associated with dyslexia. Researchers can access shared data to address fundamental questions about dyslexia and development, replicate research findings, apply new methods, and educate the next generation of researchers. The overarching goal of this platform is to advance our understanding of a disorder that has significant academic, social, and economic impacts on children, their families, and society.
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Affiliation(s)
| | | | - Mark A Eckert
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Kenneth I Vaden
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - James Z Wang
- School of Computing, Clemson University, Clemson, SC, USA
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4
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Eckert MA, Husain FT, M P Jayakody D, Schlee W, Cederroth CR. An Opportunity for Constructing the Future of Data Sharing in Otolaryngology. J Assoc Res Otolaryngol 2023; 24:397-399. [PMID: 37561372 PMCID: PMC10504138 DOI: 10.1007/s10162-023-00908-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023] Open
Affiliation(s)
- Mark A Eckert
- Hearing Research Program, Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA.
| | - Fatima T Husain
- Department of Speech and Hearing Science and The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Dona M P Jayakody
- Ear Science Institute Australia, Subiaco, WA, 6008, Australia
- Ear Sciences Centre, Medical School, University of Western Australia, Crawley, Australia
| | - Winfried Schlee
- Institute for Information and Process Management, Eastern Switzerland University of Applied Sciences, St. Gallen, Switzerland
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Christopher R Cederroth
- Laboratory of Translational Auditory Neuroscience, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
- Translational Hearing Research, Tübingen Hearing Research Center, Department of Otolaryngology, Head and Neck Surgery, University of Tübingen, Tübingen, Germany
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Lang H, Noble KV, Barth JL, Rumschlag JA, Jenkins TR, Storm SL, Eckert MA, Dubno JR, Schulte BA. The Stria Vascularis in Mice and Humans Is an Early Site of Age-Related Cochlear Degeneration, Macrophage Dysfunction, and Inflammation. J Neurosci 2023; 43:5057-5075. [PMID: 37268417 PMCID: PMC10324995 DOI: 10.1523/jneurosci.2234-22.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 04/19/2023] [Accepted: 05/25/2023] [Indexed: 06/04/2023] Open
Abstract
Age-related hearing loss, or presbyacusis, is a common degenerative disorder affecting communication and quality of life for millions of older adults. Multiple pathophysiologic manifestations, along with many cellular and molecular alterations, have been linked to presbyacusis; however, the initial events and causal factors have not been clearly established. Comparisons of the transcriptome in the lateral wall (LW) with other cochlear regions in a mouse model (of both sexes) of "normal" age-related hearing loss revealed that early pathophysiological alterations in the stria vascularis (SV) are associated with increased macrophage activation and a molecular signature indicative of inflammaging, a common form of immune dysfunction. Structure-function correlation analyses in mice across the lifespan showed that the age-dependent increase in macrophage activation in the stria vascularis is associated with a decline in auditory sensitivity. High-resolution imaging analysis of macrophage activation in middle-aged and aged mouse and human cochleas, along with transcriptomic analysis of age-dependent changes in mouse cochlear macrophage gene expression, support the hypothesis that aberrant macrophage activity is an important contributor to age-dependent strial dysfunction, cochlear pathology, and hearing loss. Thus, this study highlights the SV as a primary site of age-related cochlear degeneration and aberrant macrophage activity and dysregulation of the immune system as early indicators of age-related cochlear pathology and hearing loss. Importantly, novel new imaging methods described here now provide a means to analyze human temporal bones in a way that had not previously been feasible and thereby represent a significant new tool for otopathological evaluation.SIGNIFICANCE STATEMENT Age-related hearing loss is a common neurodegenerative disorder affecting communication and quality of life. Current interventions (primarily hearing aids and cochlear implants) offer imperfect and often unsuccessful therapeutic outcomes. Identification of early pathology and causal factors is crucial for the development of new treatments and early diagnostic tests. Here, we find that the SV, a nonsensory component of the cochlea, is an early site of structural and functional pathology in mice and humans that is characterized by aberrant immune cell activity. We also establish a new technique for evaluating cochleas from human temporal bones, an important but understudied area of research because of a lack of well-preserved human specimens and difficult tissue preparation and processing approaches.
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Affiliation(s)
- Hainan Lang
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Kenyaria V Noble
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Jeremy L Barth
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Jeffrey A Rumschlag
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Tyreek R Jenkins
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Shelby L Storm
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Judy R Dubno
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Bradley A Schulte
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina 29425
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6
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Ryan DB, Eckert MA, Sellers EW, Schairer KS, McBee MT, Ridley EA, Smith SL. Performance Monitoring and Cognitive Inhibition during a Speech-in-Noise Task in Older Listeners. Semin Hear 2023; 44:124-139. [PMID: 37122879 PMCID: PMC10147504 DOI: 10.1055/s-0043-1767695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
The goal of this study was to examine the effect of hearing loss on theta and alpha electroencephalography (EEG) frequency power measures of performance monitoring and cognitive inhibition, respectively, during a speech-in-noise task. It was hypothesized that hearing loss would be associated with an increase in the peak power of theta and alpha frequencies toward easier conditions compared to normal hearing adults. The shift would reflect how hearing loss modulates the recruitment of listening effort to easier listening conditions. Nine older adults with normal hearing (ONH) and 10 older adults with hearing loss (OHL) participated in this study. EEG data were collected from all participants while they completed the words-in-noise task. It hypothesized that hearing loss would also have an effect on theta and alpha power. The ONH group showed an inverted U -shape effect of signal-to-noise ratio (SNR), but there were limited effects of SNR on theta or alpha power in the OHL group. The results of the ONH group support the growing body of literature showing effects of listening conditions on alpha and theta power. The null results of listening condition in the OHL group add to a smaller body of literature, suggesting that listening effort research conditions should have near ceiling performance.
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Affiliation(s)
- David B. Ryan
- Hearing and Balance Research Program, James H. Quillen VA Medical Center, Mountain Home, Tennessee
- Department of Psychology, East Tennessee State University, Johnson City, Tennessee
- Department of Head and Neck Surgery and Communication Sciences, Duke University School of Medicine, Durham, North Carolina
| | - Mark A. Eckert
- Department of Otolaryngology - Head and Neck Surgery, Hearing Research Program, Medical University of South Carolina, Charleston, North Carolina
| | - Eric W. Sellers
- Department of Psychology, East Tennessee State University, Johnson City, Tennessee
| | - Kim S. Schairer
- Hearing and Balance Research Program, James H. Quillen VA Medical Center, Mountain Home, Tennessee
- Department of Audiology and Speech Language Pathology, East Tennessee State University, Johnson City, Tennessee
| | - Matthew T. McBee
- Department of Psychology, East Tennessee State University, Johnson City, Tennessee
| | - Elizabeth A. Ridley
- Department of Psychology, East Tennessee State University, Johnson City, Tennessee
| | - Sherri L. Smith
- Department of Head and Neck Surgery and Communication Sciences, Duke University School of Medicine, Durham, North Carolina
- Center for the Study of Aging and Human Development, Duke University, Durham, North Carolina
- Department of Population Health Sciences, Duke University School of Medicine, Durham, North Carolina
- Audiology and Speech Pathology Service, Durham Veterans Affairs Healthcare System, Durham, North Carolina
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7
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Eberhard JM, Matthews LJ, Vaden KI, Dubno JR, Eckert MA. Probability Distributions for Associations Between Cognitive Screening and Pure-tone Thresholds in Older Adults. Ear Hear 2023; 44:641-654. [PMID: 36607744 PMCID: PMC10101874 DOI: 10.1097/aud.0000000000001313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVES Lower general cognitive function is frequently reported in older adults with elevated pure-tone thresholds. Here, we examined reason(s) for this association, including whether this relationship is dependent on the frequency range or extent of hearing loss and cognitive screening performance. DESIGN Linear regression was used to examine associations between better-ear pure-tone thresholds and Mini-Mental Status Exam (MMSE) performance in a cross-sectional sample of relatively healthy older adults (N = 508; 68% women, 60-89+ years; M age = 72). Quantile regression was also used to identify the ranges of 0.5 and 4.0 kHz thresholds and MMSE scores where these variables exhibited significant associations. RESULTS MMSE scores and pure-tone thresholds exhibited small but significant associations, particularly for better-ear 0.5 kHz thresholds. This hearing threshold and cognitive screening association was present among participants with better hearing, including the oldest older adults. There was limited evidence for mediating health condition effects on this association. An item analysis of the MMSE revealed that the MMSE and pure-tone threshold associations were largely due to the delayed recall item of the MMSE. CONCLUSIONS Together, the small effect results are consistent with the extant literature and suggest that there are multiple reasons for modest pure-tone threshold and cognitive screening performance associations.
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Affiliation(s)
- Jacqueline M. Eberhard
- Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Lois. J. Matthews
- Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Kenneth I. Vaden
- Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Judy R. Dubno
- Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Mark A. Eckert
- Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
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8
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Joshi F, Wang JZ, Vaden KI, Eckert MA. Deep Learning Classification of Reading Disability with Regional Brain Volume Features. Neuroimage 2023; 273:120075. [PMID: 37054828 PMCID: PMC10167676 DOI: 10.1016/j.neuroimage.2023.120075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 12/02/2022] [Accepted: 03/30/2023] [Indexed: 04/15/2023] Open
Abstract
Developmental reading disability is a prevalent and often enduring problem with varied mechanisms that contributes to its phenotypic heterogeneity. This mechanistic and phenotypic variation, as well as relatively modest sample sizes, may have limited the development of accurate neuroimaging-based classifiers for reading disability, including because of the large feature space of neuroimaging datasets. An unsupervised learning model was used to reduce deformation-based data to a lower-dimensional manifold and then supervised learning models were used to classify these latent representations in a dataset of 96 reading disability cases and 96 controls (mean age: 9.86 ± 1.56). A combined unsupervised autoencoder and supervised convolutional neural network approach provided an effective classification of cases and controls (accuracy: 77%; precision: 0.75; recall: 0.78). Brain regions that contributed to this classification accuracy were identified by adding noise to the voxel-level image data, which showed that reading disability classification accuracy was most influenced by the superior temporal sulcus, dorsal cingulate, and lateral occipital cortex. Regions that were most important for the accurate classification of controls included the supramarginal gyrus, orbitofrontal, and medial occipital cortex. The contribution of these regions reflected individual differences in reading-related abilities, such as non-word decoding or verbal comprehension. Together, the results demonstrate an optimal deep learning solution for classification using neuroimaging data. In contrast with standard mass-univariate test results, results from the deep learning model also provided evidence for regions that may be specifically affected in reading disability cases.
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Affiliation(s)
- Foram Joshi
- School of Computing, Clemson University, Clemson, S.C. U.S.A
| | - James Z Wang
- School of Computing, Clemson University, Clemson, S.C. U.S.A
| | - Kenneth I Vaden
- Department of Otolaryngology - Head and Neck Surgery Medical University of South Carolina, Charleston, S.C. U.S.A
| | - Mark A Eckert
- Department of Otolaryngology - Head and Neck Surgery Medical University of South Carolina, Charleston, S.C. U.S.A..
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Eckert MA. Structural Covariance of the Duplicated Heschl's Gyrus: A Sulcal/Gyral Template Morphology Approach. bioRxiv 2023:2023.03.29.534799. [PMID: 37034820 PMCID: PMC10081200 DOI: 10.1101/2023.03.29.534799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
UNLABELLED Heschl's gyrus (HG) can occur as a single gyrus or with a completely duplicated posterior HG that has been related to a variety of abilities and disorders. Voxel-based studies typically involve the normalization of these qualitatively different HG types, thus making it difficult to evaluate the contribution of sulcal/gyral variability to voxel-based effects and perhaps obscuring some effects. To examine the structural covariance of single and duplicated HG, templates were created for the left single and duplicated HG. Structural covariance analysis with a Jacobian measure of volumetric displacement demonstrated consistent spatial covariance with homologous structure in the right hemisphere across qualitatively different HG morphology. These results suggest that HG duplication is aptly named with respect to cortical structure variation and demonstrate a multi-template approach for studying qualitatively unique brain function and structure linked to perceptual and cognitive functions. HIGHLIGHTS Qualitatively unique sulcal/gyral features can affect voxel-based analyses.Heschl's gyrus is highly variable across people.Morphology-specific templates were created to study Heschl's gyrus structural covariance.Single and duplicated Heschl's gyrus exhibited a similar pattern of covariance.
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10
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Eckert MA, Iuricich F, Harris KC, Hamlett ED, Vazey EM, Aston-Jones G. Locus coeruleus and dorsal cingulate morphology contributions to slowed processing speed. Neuropsychologia 2023; 179:108449. [PMID: 36528219 PMCID: PMC9906468 DOI: 10.1016/j.neuropsychologia.2022.108449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/15/2022]
Abstract
Slowed information processing speed is a defining feature of cognitive aging. Nucleus locus coeruleus (LC) and medial prefrontal regions are targets for understanding slowed processing speed because these brain regions influence neural and behavioral response latencies through their roles in optimizing task performance. Although structural measures of medial prefrontal cortex have been consistently related to processing speed, it is unclear if 1) declines in LC structure underlie this association because of reciprocal connections between LC and medial prefrontal cortex, or 2) if LC declines provide a separate explanation for age-related changes in processing speed. LC and medial prefrontal structural measures were predicted to explain age-dependent individual differences in processing speed in a cross-sectional sample of 43 adults (19-79 years; 63% female). Higher turbo-spin echo LC contrast, based on a persistent homology measure, and greater dorsal cingulate cortical thickness were significantly and each uniquely related to faster processing speed. However, only dorsal cingulate cortical thickness appeared to statistically mediate age-related differences in processing speed. The results suggest that individual differences in cognitive processing speed can be attributed, in part, to structural variation in nucleus LC and medial prefrontal cortex, with the latter key to understanding why older adults exhibit slowed processing speed.
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Affiliation(s)
- Mark A Eckert
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, MSC 550, Charleston, S.C., 29425-5500, USA.
| | - Federico Iuricich
- Visual Computing Division, School of Computing, Clemson University, Clemson, S.C., 29634, USA
| | - Kelly C Harris
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, MSC 550, Charleston, S.C., 29425-5500, USA
| | - Eric D Hamlett
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, S.C., 29425-5500, USA
| | - Elena M Vazey
- Department of Biology, University of Massachusetts Amherst, Amherst, MA, 01003-9297, USA
| | - Gary Aston-Jones
- Brain Health Institute, Rutgers University/Rutgers Biomedical and Health Sciences, Piscataway, NJ, 08854, USA
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Abstract
BACKGROUND Current clinical classifications of olfactory function are based primarily upon a percentage of correct answers in olfactory identification testing. This simple classification provides little insight into etiologies of olfactory loss, associated comorbidities, or impact on the quality of life (QOL). METHODS Community-based subjects underwent olfactory psychophysical testing using Sniffin Sticks to measure threshold (T), discrimination (D), and identification (I). The cognitive screening was performed using Mini-Mental Status Examination (MMSE). Unsupervised clustering was performed based upon T, D, I, and MMSE. Post hoc differences in demographics, comorbidities, and QOL measures were assessed. RESULTS Clustering of 219 subjects, mean age 51 years (range 20-93 years) resulted in 4 unique clusters. Cluster 1 was the largest and predominantly younger normosmics. Cluster 2 had the worst olfaction with impairment in nearly all aspects of olfaction and decreased MMSE scores. This cluster had higher rates of smoking, heart disease, and cancer and had the worst olfactory-specific QOL. Cluster 3 had normal MMSE with relative preservation of D and I, but severely impaired T. This cluster had higher rates of smoking and heart disease with moderately impaired QOL. Cluster 4 was notable for the worst MMSE scores, but general preservation of D and I with moderate loss of T. This cluster had higher rates of Black subjects, diabetes, and viral/traumatic olfactory loss. CONCLUSION Unsupervised clustering based upon detailed olfactory testing and cognitive testing results in clinical phenotypes with unique risk factors and QOL impacts. These clusters may provide additional information regarding etiologies and subsequent therapies to treat olfactory loss.
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Affiliation(s)
- Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Judy R Dubno
- Department of Otolaryngology-Head and Neck Surgery, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Andreana M Benitez
- Department of Neurology, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Matthew Gregoski
- Department of Public Health Sciences, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Viswanathan Ramakrishnan
- Department of Public Health Sciences, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Lois Matthews
- Department of Otolaryngology-Head and Neck Surgery, 2345Medical University of South Carolina, Charleston, South Carolina
| | - Zachary M Soler
- Department of Otolaryngology-Head and Neck Surgery, 2345Medical University of South Carolina, Charleston, South Carolina
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12
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Vaden KI, Teubner-Rhodes S, Ahlstrom JB, Dubno JR, Eckert MA. Evidence for cortical adjustments to perceptual decision criteria during word recognition in noise. Neuroimage 2022; 253:119042. [PMID: 35259524 PMCID: PMC9082296 DOI: 10.1016/j.neuroimage.2022.119042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 02/23/2022] [Accepted: 02/26/2022] [Indexed: 01/31/2023] Open
Abstract
Extensive increases in cingulo-opercular frontal activity are typically observed during speech recognition in noise tasks. This elevated activity has been linked to a word recognition benefit on the next trial, termed "adaptive control," but how this effect might be implemented has been unclear. The established link between perceptual decision making and cingulo-opercular function may provide an explanation for how those regions benefit subsequent word recognition. In this case, processes that support recognition such as raising or lowering the decision criteria for more accurate or faster recognition may be adjusted to optimize performance on the next trial. The current neuroimaging study tested the hypothesis that pre-stimulus cingulo-opercular activity reflects criterion adjustments that determine how much information to collect for word recognition on subsequent trials. Participants included middle-age and older adults (N = 30; age = 58.3 ± 8.8 years; m ± sd) with normal hearing or mild sensorineural hearing loss. During a sparse fMRI experiment, words were presented in multitalker babble at +3 dB or +10 dB signal-to-noise ratio (SNR), which participants were instructed to repeat aloud. Word recognition was significantly poorer with increasing participant age and lower SNR compared to higher SNR conditions. A perceptual decision-making model was used to characterize processing differences based on task response latency distributions. The model showed that significantly less sensory evidence was collected (i.e., lower criteria) for lower compared to higher SNR trials. Replicating earlier observations, pre-stimulus cingulo-opercular activity was significantly predictive of correct recognition on a subsequent trial. Individual differences showed that participants with higher criteria also benefitted the most from pre-stimulus activity. Moreover, trial-level criteria changes were significantly linked to higher versus lower pre-stimulus activity. These results suggest cingulo-opercular cortex contributes to criteria adjustments to optimize speech recognition task performance.
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Affiliation(s)
- Kenneth I. Vaden
- Hearing Research Program, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave. MSC 550, Charleston, SC 29455-5500, United States,Corresponding author. (K.I. Vaden Jr)
| | - Susan Teubner-Rhodes
- Hearing Research Program, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave. MSC 550, Charleston, SC 29455-5500, United States,Department of Psychological Sciences, 226 Thach Hall, Auburn University, AL 36849-9027
| | - Jayne B. Ahlstrom
- Hearing Research Program, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave. MSC 550, Charleston, SC 29455-5500, United States
| | - Judy R. Dubno
- Hearing Research Program, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave. MSC 550, Charleston, SC 29455-5500, United States
| | - Mark A. Eckert
- Hearing Research Program, Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave. MSC 550, Charleston, SC 29455-5500, United States
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13
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Vaden KI, Eckert MA, Matthews LJ, Schmiedt RA, Dubno JR. Metabolic and Sensory Components of Age-Related Hearing Loss. J Assoc Res Otolaryngol 2022; 23:253-272. [PMID: 35064426 PMCID: PMC8964894 DOI: 10.1007/s10162-021-00826-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 11/23/2021] [Indexed: 12/01/2022] Open
Abstract
Age-related hearing loss is a multifactorial condition with effects of aging and environmental exposures that contribute to cochlear pathologies. Metabolic hearing loss involves declines in the endocochlear potential, which broadly reduce cochlear amplification of low-level sounds. Sensory hearing loss involves damage to outer hair cells that may eliminate amplification, especially for high-frequency sounds. A novel approach was developed to estimate the extent of metabolic and sensory components (in dB) for an individual, by combining hearing loss profiles to optimally approximate their hearing thresholds (audiogram). This approach was validated using estimates of metabolic and sensory hearing loss from retrospective datasets including gerbils, cross-sectional and longitudinal audiograms from older adults, a measure of speech recognition in noise, and histopathology case reports. Simulation results showed that well-approximated audiograms can produce accurate metabolic and sensory estimates. Estimates of metabolic and sensory components of age-related hearing loss differentiated gerbils with known strial and/or sensory pathologies based on age and exposures. For older adults, metabolic estimates consistently increased with age and were associated with poorer speech recognition in noise, while sensory estimates were related to sex and noise exposure differences. Histopathology case reports (with audiograms) that described strial and outer hair cell pathology in temporal bones from older donors showed significant differences in metabolic and sensory estimates, respectively. The results support the view that audiograms include information that can be used to estimate the metabolic and sensory components of age-related hearing loss.
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Affiliation(s)
- Kenneth I. Vaden
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC 29425-5500 USA
| | - Mark A. Eckert
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC 29425-5500 USA
| | - Lois J. Matthews
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC 29425-5500 USA
| | - Richard A. Schmiedt
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC 29425-5500 USA
| | - Judy R. Dubno
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC 29425-5500 USA
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14
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Eckert MA, Vaden KI, Iuricich F. Cortical asymmetries at different spatial hierarchies relate to phonological processing ability. PLoS Biol 2022; 20:e3001591. [PMID: 35381012 PMCID: PMC8982829 DOI: 10.1371/journal.pbio.3001591] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 03/03/2022] [Indexed: 11/22/2022] Open
Abstract
The ability to map speech sounds to corresponding letters is critical for establishing proficient reading. People vary in this phonological processing ability, which has been hypothesized to result from variation in hemispheric asymmetries within brain regions that support language. A cerebral lateralization hypothesis predicts that more asymmetric brain structures facilitate the development of foundational reading skills like phonological processing. That is, structural asymmetries are predicted to linearly increase with ability. In contrast, a canalization hypothesis predicts that asymmetries constrain behavioral performance within a normal range. That is, structural asymmetries are predicted to quadratically relate to phonological processing, with average phonological processing occurring in people with the most asymmetric structures. These predictions were examined in relatively large samples of children (N = 424) and adults (N = 300), using a topological asymmetry analysis of T1-weighted brain images and a decoding measure of phonological processing. There was limited evidence of structural asymmetry and phonological decoding associations in classic language-related brain regions. However, and in modest support of the cerebral lateralization hypothesis, small to medium effect sizes were observed where phonological decoding accuracy increased with the magnitude of the largest structural asymmetry across left hemisphere cortical regions, but not right hemisphere cortical regions, for both the adult and pediatric samples. In support of the canalization hypothesis, small to medium effect sizes were observed where phonological decoding in the normal range was associated with increased asymmetries in specific cortical regions for both the adult and pediatric samples, which included performance monitoring and motor planning brain regions that contribute to oral and written language functions. Thus, the relevance of each hypothesis to phonological decoding may depend on the scale of brain organization.
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Affiliation(s)
- Mark A. Eckert
- Hearing Research Program, Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Kenneth I. Vaden
- Hearing Research Program, Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Federico Iuricich
- Visual Computing Division, School of Computing, Clemson University, Clemson, South Carolina, United States of America
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15
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Eckert MA, Teubner-Rhodes S, Vaden KI, Ahlstrom JB, McClaskey CM, Dubno JR. Unique patterns of hearing loss and cognition in older adults' neural responses to cues for speech recognition difficulty. Brain Struct Funct 2022; 227:203-218. [PMID: 34632538 PMCID: PMC9044122 DOI: 10.1007/s00429-021-02398-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 09/26/2021] [Indexed: 01/31/2023]
Abstract
Older adults with hearing loss experience significant difficulties understanding speech in noise, perhaps due in part to limited benefit from supporting executive functions that enable the use of environmental cues signaling changes in listening conditions. Here we examined the degree to which 41 older adults (60.56-86.25 years) exhibited cortical responses to informative listening difficulty cues that communicated the listening difficulty for each trial compared to neutral cues that were uninformative of listening difficulty. Word recognition was significantly higher for informative compared to uninformative cues in a + 10 dB signal-to-noise ratio (SNR) condition, and response latencies were significantly shorter for informative cues in the + 10 dB SNR and the more-challenging + 2 dB SNR conditions. Informative cues were associated with elevated blood oxygenation level-dependent contrast in visual and parietal cortex. A cue-SNR interaction effect was observed in the cingulo-opercular (CO) network, such that activity only differed between SNR conditions when an informative cue was presented. That is, participants used the informative cues to prepare for changes in listening difficulty from one trial to the next. This cue-SNR interaction effect was driven by older adults with more low-frequency hearing loss and was not observed for those with more high-frequency hearing loss, poorer set-shifting task performance, and lower frontal operculum gray matter volume. These results suggest that proactive strategies for engaging CO adaptive control may be important for older adults with high-frequency hearing loss to optimize speech recognition in changing and challenging listening conditions.
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Affiliation(s)
- Mark A. Eckert
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 55, Charleston, SC 29425-5500, USA
| | | | - Kenneth I. Vaden
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 55, Charleston, SC 29425-5500, USA
| | - Jayne B. Ahlstrom
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 55, Charleston, SC 29425-5500, USA
| | - Carolyn M. McClaskey
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 55, Charleston, SC 29425-5500, USA
| | - Judy R. Dubno
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 55, Charleston, SC 29425-5500, USA
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16
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Abstract
Cancer-associated fibroblasts (CAFs) play important roles in regulating tumor progression, metastasis, and response to therapies. Accurately modeling the interplay between cancer cells and the tumor microenvironment (TME) requires the use of primary cells from patient samples. Here we describe methods for the isolation of both primary CAFs and fibroblasts from omental tissue using a combination of mechanical dissociation and enzymatic digestion. Primary cells can be used for functional and mechanistic studies and may be safely cryopreserved.
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Affiliation(s)
- Katarzyna Zawieracz
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Mark A Eckert
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA.
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17
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Javellana M, Eckert MA, Heide J, Zawieracz K, Weigert M, Ashley S, Stock E, Chapel D, Huang L, Yamada SD, Ahmed AA, Lastra RR, Chen M, Lengyel E. Neoadjuvant chemotherapy induces genomic and transcriptomic changes in ovarian cancer. Cancer Res 2021; 82:169-176. [PMID: 34737212 DOI: 10.1158/0008-5472.can-21-1467] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 09/12/2021] [Accepted: 10/29/2021] [Indexed: 11/16/2022]
Abstract
The growing use of neoadjuvant chemotherapy to treat advanced-stage high-grade serous ovarian cancer (HGSOC) creates an opportunity to better understand chemotherapy-induced mutational and gene expression changes. Here we performed a cohort study including 34 patients with advanced stage IIIC or IV HGSOC to assess changes in the tumor genome and transcriptome in women receiving neoadjuvant chemotherapy. RNA-sequencing and panel DNA-sequencing of 596 cancer-related genes was performed on paired FFPE specimens collected before and after chemotherapy, and differentially expressed genes (DEGs) and CNVs in pre- and post-chemotherapy samples were identified. Following tissue and sequencing quality control, the final patient cohort consisted of 32 paired DNA and 20 paired RNA samples. Genomic analysis of paired samples did not reveal any recurrent chemotherapy-induced mutations. Gene expression analyses found that most DEGs were upregulated by chemotherapy, primarily in the chemotherapy resistant specimens. AP-1 transcription factor family genes (FOS, FOSB, FRA-1) were particularly upregulated in chemotherapy resistant samples. CNV analysis identified recurrent 11q23.1 amplification, which encompasses SIK2. In vitro, combined treatment with AP-1 or SIK2 inhibitors with carboplatin or paclitaxel demonstrated synergistic effects. These data suggest that AP-1 activity and SIK2 copy number amplification are induced by chemotherapy and may represent mechanisms by which chemotherapy resistance evolves in HGSOC. AP-1 and SIK2 are druggable targets with available small molecule inhibitors and represent potential targets to circumvent chemotherapy resistance.
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Affiliation(s)
| | | | - Janna Heide
- Department of Obstetrics and Gynecology, University of Chicago
| | | | | | - Sarah Ashley
- Department of Obstetrics and Gynecology, University of Chicago
| | - Elizabeth Stock
- Department of Obstetrics and Gynecology, University of Chicago
| | - David Chapel
- Department of Pathology, University of Michigan Medical School
| | - Lei Huang
- Center for Research Informatics, University of Chicago
| | - S Diane Yamada
- Departments of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago
| | | | | | | | - Ernst Lengyel
- Department of Obstetrics and Gynecology, University of Chicago
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18
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Somasegar S, Weiss AS, Norquist BM, Khasnavis N, Radke M, Manhardt E, Pennil C, Pennington KP, Eckert MA, Chryplewicz A, Lengyel E, Swisher EM. Germline mutations in Black patients with ovarian, fallopian tube and primary peritoneal carcinomas. Gynecol Oncol 2021; 163:130-133. [PMID: 34452747 DOI: 10.1016/j.ygyno.2021.08.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/03/2021] [Accepted: 08/17/2021] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Routine genetic testing for ovarian cancer and identification of germline mutations can help improve early detection of cancer as well as guide treatment. Knowledge of genetic counseling and referral rates for genetic testing has been lower for Black patients, compared to White patients. We aimed to describe the demographics and presence of germline mutations in Black individuals with ovarian, fallopian tube or peritoneal carcinoma at two large academic institutions. METHODS Fifty-one Black patients with invasive epithelial ovarian, fallopian tube, or primary peritoneal carcinoma were identified via institutional tissue banks over a 20-year time-period. Germline DNA was sequenced using BROCA, a targeted capture and parallel sequencing assay that identified pathogenic germline mutations in ovarian carcinoma susceptibility genes. RESULTS Germline mutations in ovarian cancer susceptibility genes were found in 25.5% of women, most commonly BRCA1 and BRCA2. This mutation frequency mirrors those previously described among predominantly White populations. Our data suggests there may be an advantage in survival among those with germline mutations, although this was not statistically significant. CONCLUSIONS Given similar frequencies of germline mutations between Black and White patients with ovarian cancer, we conclude that there are not major differences in the genetic predisposition to ovarian carcinoma. Equitable access to genomic advancements including germline and tumor sequencing would facilitate equal access to PARP inhibitors, the standard of care for patients with BRCA mutated advanced ovarian cancer.
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Affiliation(s)
- Sahana Somasegar
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, United States of America
| | - Arielle S Weiss
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Barbara M Norquist
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Nithisha Khasnavis
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Marc Radke
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Enna Manhardt
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Christopher Pennil
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Kathryn P Pennington
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America
| | - Mark A Eckert
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, United States of America
| | - Agnieszka Chryplewicz
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, United States of America
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, United States of America
| | - Elizabeth M Swisher
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States of America.
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Li AR, Schlosser RJ, Germroth M, Eckert MA. Voxel-based meta-analysis of gray matter alterations in olfactory dysfunction. Int Forum Allergy Rhinol 2021; 12:112-115. [PMID: 34309218 DOI: 10.1002/alr.22872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/02/2021] [Accepted: 07/04/2021] [Indexed: 11/08/2022]
Affiliation(s)
- Andraia R Li
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Matthew Germroth
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
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20
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Eckert MA, Orozco C, Xiao J, Javellana M, Lengyel E. The Effects of Chemotherapeutics on the Ovarian Cancer Microenvironment. Cancers (Basel) 2021; 13:3136. [PMID: 34201616 PMCID: PMC8268261 DOI: 10.3390/cancers13133136] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/06/2021] [Accepted: 06/07/2021] [Indexed: 12/31/2022] Open
Abstract
High-grade serous ovarian cancer (HGSOC) is characterized by a complex and dynamic tumor microenvironment (TME) composed of cancer-associated fibroblasts (CAFs), immune cells, endothelial cells, and adipocytes. Although most approved therapies target cancer cells, a growing body of evidence suggests that chemotherapeutic agents have an important role in regulating the biology of the diverse cells that compose the TME. Understanding how non-transformed cells respond and adapt to established therapeutics is necessary to completely comprehend their action and develop novel therapeutics that interrupt undesired tumor-stroma interactions. Here, we review the effects of chemotherapeutic agents on normal cellular components of the host-derived TME focusing on CAFs. We concentrate on therapies used in the treatment of HGSOC and synthesize findings from studies focusing on other cancer types and benign tissues. Agents such as platinum derivatives, taxanes, and PARP inhibitors broadly affect the TME and promote or inhibit the pro-tumorigenic roles of CAFs by modifying the bidirectional cross-talk between tumor and stromal cells in the tumor organ. While most chemotherapy research focuses on cancer cells, these studies emphasize the need to consider all cell types within the tumor organ when evaluating chemotherapeutics.
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Affiliation(s)
| | | | | | | | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA; (M.A.E.); (C.O.); (J.X.); (M.J.)
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21
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Eckert MA, Harris KC, Lang H, Lewis MA, Schmiedt RA, Schulte BA, Steel KP, Vaden KI, Dubno JR. Translational and interdisciplinary insights into presbyacusis: A multidimensional disease. Hear Res 2021; 402:108109. [PMID: 33189490 PMCID: PMC7927149 DOI: 10.1016/j.heares.2020.108109] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 10/19/2020] [Accepted: 10/25/2020] [Indexed: 12/18/2022]
Abstract
There are multiple etiologies and phenotypes of age-related hearing loss or presbyacusis. In this review we summarize findings from animal and human studies of presbyacusis, including those that provide the theoretical framework for distinct metabolic, sensory, and neural presbyacusis phenotypes. A key finding in quiet-aged animals is a decline in the endocochlear potential (EP) that results in elevated pure-tone thresholds across frequencies with greater losses at higher frequencies. In contrast, sensory presbyacusis appears to derive, in part, from acute and cumulative effects on hair cells of a lifetime of environmental exposures (e.g., noise), which often result in pronounced high frequency hearing loss. These patterns of hearing loss in animals are recognizable in the human audiogram and can be classified into metabolic and sensory presbyacusis phenotypes, as well as a mixed metabolic+sensory phenotype. However, the audiogram does not fully characterize age-related changes in auditory function. Along with the effects of peripheral auditory system declines on the auditory nerve, primary degeneration in the spiral ganglion also appears to contribute to central auditory system aging. These inner ear alterations often correlate with structural and functional changes throughout the central nervous system and may explain suprathreshold speech communication difficulties in older adults with hearing loss. Throughout this review we highlight potential methods and research directions, with the goal of advancing our understanding, prevention, diagnosis, and treatment of presbyacusis.
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Affiliation(s)
- Mark A Eckert
- Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA.
| | - Kelly C Harris
- Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA
| | - Hainan Lang
- Medical University of South Carolina, Department of Pathology and Laboratory Medicine, Charleston, SC 29425, USA
| | - Morag A Lewis
- King's College London, Wolfson Centre for Age-Related Diseases, London SE1 1UL, United Kingdom
| | - Richard A Schmiedt
- Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA
| | - Bradley A Schulte
- Medical University of South Carolina, Department of Pathology and Laboratory Medicine, Charleston, SC 29425, USA; Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA
| | - Karen P Steel
- King's College London, Wolfson Centre for Age-Related Diseases, London SE1 1UL, United Kingdom
| | - Kenneth I Vaden
- Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA
| | - Judy R Dubno
- Medical University of South Carolina, Department of Otolaryngology - Head and Neck Surgery, Charleston, SC 29425, USA; Medical University of South Carolina, Department of Pathology and Laboratory Medicine, Charleston, SC 29425, USA
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22
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Roberts DR, Inglesby DC, Brown TR, Collins HR, Eckert MA, Asemani D. Longitudinal change in ventricular volume is accelerated in astronauts undergoing long-duration spaceflight. Aging Brain 2021; 1:100017. [PMID: 36911514 PMCID: PMC9997154 DOI: 10.1016/j.nbas.2021.100017] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/12/2021] [Accepted: 05/12/2021] [Indexed: 11/18/2022] Open
Abstract
An 11-25% increase in total ventricular volume has been documented in astronauts following spaceflight on the ISS. Given the approximately 2-year time interval between pre- and post-flight MRI, it is unknown if ventricular enlargement simply reflects normal aging or is unique to spaceflight exposure. Therefore, we compared percent ventricular volume change per year (PVVC/yr) documented on pre- to post-flight MRI in a group of NASA ISS astronauts (n = 18, 16.7% women, mean age (SD) 48.43 (4.35) years) with two groups who underwent longitudinal MRI: (1.) healthy age- and sex-matched adults (n = 18, 16.7% women, mean age (SD) 51.26 (3.88) years), and (2.) healthy older adults (n = 79, 16.5% women, mean age (SD) 73.26 (5.34) years). The astronauts, who underwent a mean (SD) 173.4 (51.3) days in spaceflight, showed a greater increase in PVVC/yr than the control (6.86 vs 2.23%, respectively, p < .001) and older adult (4.18%, p = 0.04) groups. These results highlight that on top of physiologically ventricular volume changes due to normal aging, NASA astronauts undergoing ISS missions experience an additional 4.63% PVVC/yr and underscore the need to perform post-flight follow-up scans to determine the time course of PVVC in astronauts over time back on Earth along with monitoring to determine if the PVVC is ultimately clinically relevant. One sentence summary NASA astronauts who were exposed to prolonged spaceflight experienced an annual rate of ventricular expansion more than three times that expected from normal aging.
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Affiliation(s)
- Donna R. Roberts
- Department of Radiology and Radiological Science, Medical University of South Carolina, United States
- Corresponding author at: 96 Jonathan Lucas Street, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC 29425, United States.
| | - Dani C. Inglesby
- Department of Radiology and Radiological Science, Medical University of South Carolina, United States
| | - Truman R. Brown
- Department of Radiology and Radiological Science, Medical University of South Carolina, United States
| | - Heather R. Collins
- Department of Radiology and Radiological Science, Medical University of South Carolina, United States
| | - Mark A. Eckert
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina, United States
| | - Davud Asemani
- Department of Radiology and Radiological Science, Medical University of South Carolina, United States
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23
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Vaden KI, Gebregziabher M, Dyslexia Data Consortium, Eckert MA. Fully synthetic neuroimaging data for replication and exploration. Neuroimage 2020; 223:117284. [PMID: 32828925 PMCID: PMC7688496 DOI: 10.1016/j.neuroimage.2020.117284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 08/12/2020] [Accepted: 08/16/2020] [Indexed: 11/19/2022] Open
Abstract
Scientific transparency, data exploration, and education are advanced through data sharing. However, risk for disclosure of personal information and institutional data sharing regulations can impede human subject/patient data sharing and thus limit open science initiatives. Sharing fully synthetic data is an alternative when it is not possible to share real or observed data. Here we describe a data sharing approach that borrows principles and methods from multiple imputation to replace observed values with synthetic values, thereby creating a fully synthetic neuroimaging dataset that accurately represents the covariance structure of the observed dataset. Predictor tables composed of demographic, site, behavioral and total intracranial volume (ICV) variables from 264 pediatric cases were used to create synthetic predictor tables, which were then used to synthesize gray matter images derived from T1-weighted data. The synthetic predictor tables demonstrated pooled variance and statistical estimates that closely approximated the observed data, as reflected in measures of efficiency and statistical bias. Similarly, the synthetic gray matter data accurately represented the variance and voxel-level associations with predictor variables (age, sex, verbal IQ, and ICV). The magnitude and spatial distribution of gray matter effects in the observed imaging data were replicated in the pooled results from the synthetic datasets. This approach for generating fully synthetic neuroimaging data has widespread potential for data sharing, including replication, new discovery, and education. Fully synthetic neuroimaging datasets can enable data-sharing because it accurately represents patterns of variance in the original data, while diminishing the risk of privacy disclosures that can accompany neuroimaging data sharing.
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Affiliation(s)
- Kenneth I Vaden
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC, Unites States.
| | - Mulugeta Gebregziabher
- Division of Biostatistics and Epidemiology, Medical University of South Carolina, Unites States
| | | | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Avenue, MSC 550, Charleston, SC, Unites States.
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Dias JW, McClaskey CM, Eckert MA, Jensen JH, Harris KC. Intra- and interhemispheric white matter tract associations with auditory spatial processing: Distinct normative and aging effects. Neuroimage 2020; 215:116792. [PMID: 32278895 PMCID: PMC7292771 DOI: 10.1016/j.neuroimage.2020.116792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/20/2020] [Accepted: 03/20/2020] [Indexed: 12/18/2022] Open
Abstract
Declining auditory spatial processing is hypothesized to contribute to the difficulty older adults have detecting, locating, and selecting a talker from among others in noisy listening environments. Though auditory spatial processing has been associated with several cortical structures, little is known regarding the underlying white matter architecture or how age-related changes in white matter microstructure may affect it. The arcuate fasciculus is a target for understanding age-related differences in auditory spatial attention based on normative spatial attention findings in humans. Similarly, animal and human clinical studies suggest that the corpus callosum plays a role in the cross-hemispheric integration of auditory spatial information important for spatial localization and attention. The current investigation used diffusion imaging to examine the extent to which age-group differences in the identification of spatially cued speech were accounted for by individual differences in the white matter microstructure of the right arcuate fasciculus and the corpus callosum. Higher right arcuate and callosal fractional anisotropy (FA) predicted better segregation and identification of spatially cued speech across younger and older listeners. Further, individual differences in callosal microstructure mediated age-group differences in auditory spatial processing. Follow-up analyses suggested that callosal tracts connecting left and right pre-frontal and posterior parietal cortex are particularly important for auditory spatial processing. The results are consistent with previous work in animals and clinical human samples and provide a cortical mechanism to account for age-related deficits in auditory spatial processing. Further, the results suggest that both intrahemispheric and interhemispheric mechanisms are involved in auditory spatial processing.
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Affiliation(s)
- D R Roberts
- Department of Radiology and Radiological Science
| | - D Asemani
- Department of Radiology and Radiological Science
| | | | - M A Eckert
- Department of Otolaryngology-Head and Neck Surgery
| | - D C Inglesby
- Department of Radiology and Radiological ScienceMedical University of South CarolinaCharleston, South Carolina
| | - J J Bloomberg
- Neurosciences LaboratoryNASA Johnson Space CenterHouston, Texas
| | - M S George
- Department of Psychiatry and Behavioral SciencesMedical University of South CarolinaRalph H. Johnson VA Medical CenterCharleston, South Carolina
| | - T R Brown
- Department of Radiology and Radiological ScienceMedical University of South CarolinaCharleston, South Carolina
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Roberts DR, Asemani D, Nietert PJ, Eckert MA, Inglesby DC, Bloomberg JJ, George MS, Brown TR. Reply. AJNR Am J Neuroradiol 2020; 41:E8. [PMID: 31948950 DOI: 10.3174/ajnr.a6400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- D R Roberts
- Department of Radiology and Radiological Science
| | - D Asemani
- Department of Radiology and Radiological Science
| | | | - M A Eckert
- Department of Otolaryngology - Head and Neck Surgery
| | - D C Inglesby
- Department of Radiology and Radiological ScienceMedical University of South CarolinaCharleston, South Carolina
| | - J J Bloomberg
- Neurosciences LaboratoryNASA Johnson Space CenterHouston, Texas
| | - M S George
- Department of Psychiatry and Behavioral SciencesMedical University of South CarolinaCharleston, South CarolinaRalph H. Johnson VA Medical CenterCharleston, South Carolina
| | - T R Brown
- Department of Radiology and Radiological ScienceMedical University of South CarolinaCharleston, South Carolina
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Roberts DR, Asemani D, Nietert PJ, Eckert MA, Inglesby DC, Bloomberg JJ, George MS, Brown TR. Prolonged Microgravity Affects Human Brain Structure and Function. AJNR Am J Neuroradiol 2019; 40:1878-1885. [PMID: 31624117 PMCID: PMC6975111 DOI: 10.3174/ajnr.a6249] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 08/19/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE Widespread brain structural changes are seen following extended spaceflight missions. The purpose of this study was to investigate whether these structural changes are associated with alterations in motor or cognitive function. MATERIALS AND METHODS Brain MR imaging scans of National Aeronautics and Space Administration astronauts were retrospectively analyzed to quantify pre- to postflight changes in brain structure. Local structural changes were assessed using the Jacobian determinant. Structural changes were compared with clinical findings and cognitive and motor function. RESULTS Long-duration spaceflights aboard the International Space Station, but not short-duration Space Shuttle flights, resulted in a significant increase in total ventricular volume (10.7% versus 0%, P < .001, n = 12 versus n = 7). Total ventricular volume change was significantly associated with mission duration (r = 0.72, P = .001, n = 19) but negatively associated with age (r = -0.48, P = .048, n = 19). Long-duration spaceflights resulted in significant crowding of brain parenchyma at the vertex. Pre- to postflight structural changes of the left caudate correlated significantly with poor postural control; and the right primary motor area/midcingulate correlated significantly with a complex motor task completion time. Change in volume of 3 white matter regions significantly correlated with altered reaction times on a cognitive performance task (bilateral optic radiations, splenium of the corpus callosum). In a post hoc finding, astronauts who developed spaceflight-associated neuro-ocular syndrome demonstrated smaller changes in total ventricular volume than those who did not (12.8% versus 6.5%, n = 8 versus n = 4). CONCLUSIONS While cautious interpretation is appropriate given the small sample size and number of comparisons, these findings suggest that brain structural changes are associated with changes in cognitive and motor test scores and with the development of spaceflight-associated neuro-optic syndrome.
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Affiliation(s)
- D R Roberts
- From the Departments of Radiology and Radiological Science (D.R.R., D.A., D.I., T.R.B.)
- Department of Neurosciences (D.R.R.)
| | - D Asemani
- From the Departments of Radiology and Radiological Science (D.R.R., D.A., D.I., T.R.B.)
| | | | - M A Eckert
- Otolaryngology-Head and Neck Surgery (M.A.E.)
| | - D C Inglesby
- From the Departments of Radiology and Radiological Science (D.R.R., D.A., D.I., T.R.B.)
| | - J J Bloomberg
- Neurosciences Laboratory (J.J.B.), NASA Johnson Space Center, Houston, Texas
| | - M S George
- Psychiatry and Behavioral Sciences (M.S.G.), Medical University of South Carolina, Charleston, South Carolina
- Ralph H. Johnson VA Medical Center (M.S.G.), Charleston, South Carolina
| | - T R Brown
- From the Departments of Radiology and Radiological Science (D.R.R., D.A., D.I., T.R.B.)
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Vaden KI, Eckert MA, Dubno JR, Harris KC. Cingulo-opercular adaptive control for younger and older adults during a challenging gap detection task. J Neurosci Res 2019; 98:680-691. [PMID: 31385349 DOI: 10.1002/jnr.24506] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 07/18/2019] [Accepted: 07/19/2019] [Indexed: 11/07/2022]
Abstract
Cingulo-opercular activity is hypothesized to reflect an adaptive control function that optimizes task performance through adjustments in attention and behavior, and outcome monitoring. While auditory perceptual task performance appears to benefit from elevated activity in cingulo-opercular regions of frontal cortex before stimuli are presented, this association appears reduced for older adults compared to younger adults. However, adaptive control function may be limited by difficult task conditions for older adults. An fMRI study was used to characterize adaptive control differences while 15 younger (average age = 24 years) and 15 older adults (average age = 68 years) performed a gap detection in noise task designed to limit age-related differences. During the fMRI study, participants listened to a noise recording and indicated with a button-press whether it contained a gap. Stimuli were presented between sparse fMRI scans (TR = 8.6 s) and BOLD measurements were collected during separate listening and behavioral response intervals. Age-related performance differences were limited by presenting gaps in noise with durations calibrated at or above each participant's detection threshold. Cingulo-opercular BOLD increased significantly throughout listening and behavioral response intervals, relative to a resting baseline. Correct behavioral responses were significantly more likely on trials with elevated pre-stimulus cingulo-opercular BOLD, consistent with an adaptive control framework. Cingulo-opercular adaptive control estimates appeared higher for participants with better gap sensitivity and lower response bias, irrespective of age, which suggests that this mechanism can benefit performance across the lifespan under conditions that limit age-related performance differences.
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Affiliation(s)
- Kenneth I Vaden
- Hearing Research Program, Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Mark A Eckert
- Hearing Research Program, Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Judy R Dubno
- Hearing Research Program, Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Kelly C Harris
- Hearing Research Program, Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
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Ganjaei KG, Soler ZM, Mappus ED, Worley ML, Rowan NR, Garcia GJM, Matthews LJ, Dubno JR, Eckert MA, Schlosser RJ. Radiologic changes in the aging nasal cavity. Rhinology 2019; 57:117-124. [PMID: 30352446 DOI: 10.4193/rhin18.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND With an aging population, it is important to understand age-related anatomic changes in the nasal cavity and cribriform plate (CP) that may have clinical implications. METHODOLOGY Computed tomography (CT) scans obtained for non-rhinologic conditions were divided into a young cohort (N=35, 18-34 years old) and an older adult cohort (N=32, 80-99 years old). Intranasal airspace volumes and bony anatomy of the CP were manually segmented using OsiriX software. The CP was assessed for mean Hounsfield Units (HU) and percentage of olfactory foramina. Deformation based morphometry (DBM) was then performed on the same cohort and correlated with manual measurements. RESULTS Individual nasal cavity volumes increased 17-75% with age. Regression analysis of all scans revealed age to be the predominant variable influencing intranasal volume differences when controlling for sex and head size. Mean HU of the CP negatively correlated with age. No age-related differences in bone stenosis of olfactory foramina were identified. Automated DBM measurements of intranasal volumes, as well as CP and zygoma mean HU correlated with manual measurements. CONCLUSION Older subjects have a global increase in intranasal volumes and diffuse bone density loss in the CP. The clinical impact of age-related anatomic changes in the nasal cavity and CP requires further investigation.
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Affiliation(s)
- Kimia G Ganjaei
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC; Rutgers Robert Wood Johnson Medical School, Piscataway, NJ United States
| | - Zachary M Soler
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Elliott D Mappus
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Mitchell L Worley
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Nicholas R Rowan
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Guilherme J M Garcia
- Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Lois J Matthews
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Judy R Dubno
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
| | - Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC United States
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30
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Eckert MA, Vaden KI. A deformation-based approach for characterizing brain asymmetries at different spatial scales of resolution. J Neurosci Methods 2019; 322:1-9. [PMID: 30998943 DOI: 10.1016/j.jneumeth.2019.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/19/2019] [Accepted: 04/12/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND Structural cerebral asymmetries are hypothesized to provide an architectural foundation for functional asymmetries and behavioral lateralities. Studies of structural asymmetries typically focus on gray matter measures that are influenced by gross deformation fields used for normalization, and thus characterize a combination of different morphologic influences on structural asymmetries. NEW METHOD A deformation-based morphometry approach was developed to characterize structural asymmetries at different spatial scales of resolution, which can provide relatively more specific inference about the morphologic reason(s) for structural asymmetries, using a dataset of 347 typically developing children (7.00-12.92 years). RESULTS Significant structural asymmetries were observed for a larger lobar spatial scale (e.g., frontal petalia) and for a smaller gyral/sulcal spatial scale of resolution (e.g., marginal sulcus). Total intracranial volume was significantly associated with asymmetries at the larger spatial scale of normalization, while age was significantly associated with asymmetries at the smaller scale of normalization. There were no significant anti- or fluctuating asymmetry effects based on Hartigan Dip Tests and Bonnett Tests, respectively. COMPARISON WITH EXISTING METHOD(S) While spatially similar asymmetries were observed in both gray matter and deformation field data (e.g., medial planum temporale/Heschl's gyrus), the deformation approach characterizes asymmetries based on three iterations of successively smaller scales of normalization. CONCLUSIONS Structural asymmetries can be identified in normalization deformations with a procedure that is tailored for sensitivity to structures at different spatial scales of resolution where there may be different mechanisms for the expression of asymmetry.
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Affiliation(s)
- Mark A Eckert
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, S.C., 29412, United States.
| | - Kenneth I Vaden
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, S.C., 29412, United States
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- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, S.C., 29412, United States
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Bast RC, Matulonis UA, Sood AK, Ahmed AA, Amobi AE, Balkwill FR, Wielgos-Bonvallet M, Bowtell DDL, Brenton JD, Brugge JS, Coleman RL, Draetta GF, Doberstein K, Drapkin RI, Eckert MA, Edwards RP, Elias KM, Ennis D, Futreal A, Gershenson DM, Greenberg RA, Huntsman DG, Ji JXY, Kohn EC, Iavarone C, Lengyel ER, Levine DA, Lord CJ, Lu Z, Mills GB, Modugno F, Nelson BH, Odunsi K, Pilsworth JA, Rottapel RK, Powell DJ, Shen L, Shih LM, Spriggs DR, Walton J, Zhang K, Zhang R, Zou L. Critical questions in ovarian cancer research and treatment: Report of an American Association for Cancer Research Special Conference. Cancer 2019; 125:1963-1972. [PMID: 30835824 PMCID: PMC6557260 DOI: 10.1002/cncr.32004] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 12/24/2022]
Abstract
Substantial progress has been made in understanding ovarian cancer at the molecular and cellular level. Significant improvement in 5-year survival has been achieved through cytoreductive surgery, combination platinum-based chemotherapy, and more effective treatment of recurrent cancer, and there are now more than 280,000 ovarian cancer survivors in the United States. Despite these advances, long-term survival in late-stage disease has improved little over the last 4 decades. Poor outcomes relate, in part, to late stage at initial diagnosis, intrinsic drug resistance, and the persistence of dormant drug-resistant cancer cells after primary surgery and chemotherapy. Our ability to accelerate progress in the clinic will depend on the ability to answer several critical questions regarding this disease. To assess current answers, an American Association for Cancer Research Special Conference on "Critical Questions in Ovarian Cancer Research and Treatment" was held in Pittsburgh, Pennsylvania, on October 1-3, 2017. Although clinical, translational, and basic investigators conducted much of the discussion, advocates participated in the meeting, and many presentations were directly relevant to patient care, including treatment with poly adenosine diphosphate ribose polymerase (PARP) inhibitors, attempts to improve immunotherapy by overcoming the immune suppressive effects of the microenvironment, and a better understanding of the heterogeneity of the disease.
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Affiliation(s)
- Robert C. Bast
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Anil K. Sood
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Andrew Futreal
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | | | | | | | | | | | | | - Zhen Lu
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | - Brad H. Nelson
- University of British Columbia, Canada
- BC Cancer Agency, Canada
| | | | | | | | | | - Li Shen
- Roswell Park Cancer Institute, Buffalo, NY
| | - le-Ming Shih
- Johns Hopkins University School of Medicine, Baltimore, MD
| | | | | | | | | | - Lee Zou
- Massachusetts General Hospital, Boston, MD
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Eckert MA, Coscia F, Chryplewicz A, Chang JW, Hernandez KM, Pan S, Tienda SM, Nahotko DA, Li G, Blaženović I, Lastra RR, Curtis M, Yamada SD, Perets R, McGregor SM, Andrade J, Fiehn O, Moellering RE, Mann M, Lengyel E. Proteomics reveals NNMT as a master metabolic regulator of cancer-associated fibroblasts. Nature 2019; 569:723-728. [PMID: 31043742 PMCID: PMC6690743 DOI: 10.1038/s41586-019-1173-8] [Citation(s) in RCA: 270] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 03/27/2019] [Indexed: 12/23/2022]
Abstract
High-grade serous carcinoma has a poor prognosis, owing primarily to its early dissemination throughout the abdominal cavity. Genomic and proteomic approaches have provided snapshots of the proteogenomics of ovarian cancer1,2, but a systematic examination of both the tumour and stromal compartments is critical in understanding ovarian cancer metastasis. Here we develop a label-free proteomic workflow to analyse as few as 5,000 formalin-fixed, paraffin-embedded cells microdissected from each compartment. The tumour proteome was stable during progression from in situ lesions to metastatic disease; however, the metastasis-associated stroma was characterized by a highly conserved proteomic signature, prominently including the methyltransferase nicotinamide N-methyltransferase (NNMT) and several of the proteins that it regulates. Stromal NNMT expression was necessary and sufficient for functional aspects of the cancer-associated fibroblast (CAF) phenotype, including the expression of CAF markers and the secretion of cytokines and oncogenic extracellular matrix. Stromal NNMT expression supported ovarian cancer migration, proliferation and in vivo growth and metastasis. Expression of NNMT in CAFs led to depletion of S-adenosyl methionine and reduction in histone methylation associated with widespread gene expression changes in the tumour stroma. This work supports the use of ultra-low-input proteomics to identify candidate drivers of disease phenotypes. NNMT is a central, metabolic regulator of CAF differentiation and cancer progression in the stroma that may be therapeutically targeted.
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Affiliation(s)
- Mark A Eckert
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Fabian Coscia
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Clinical Proteomics Group, Proteomics Program, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark
| | - Agnieszka Chryplewicz
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Jae Won Chang
- Department of Chemistry, University of Chicago, Chicago, IL, USA
| | - Kyle M Hernandez
- Center for Research Informatics, University of Chicago, Chicago, IL, USA
| | - Shawn Pan
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Samantha M Tienda
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Dominik A Nahotko
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Gang Li
- Department of Chemistry, University of Chicago, Chicago, IL, USA
| | - Ivana Blaženović
- West Coast Metabolomics Center, University of California Davis Genome Center, Davis, CA, USA
| | - Ricardo R Lastra
- Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Marion Curtis
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - S Diane Yamada
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA
| | - Ruth Perets
- Division of Oncology, Clinical Research Institute at Rambam, Rambam Health Care Campus, Haifa, Israel
| | | | - Jorge Andrade
- Center for Research Informatics, University of Chicago, Chicago, IL, USA
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California Davis Genome Center, Davis, CA, USA
| | | | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Clinical Proteomics Group, Proteomics Program, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL, USA.
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Eckert MA, Coscia F, Chryplewicz AA, Chang JW, Hernandez KM, Pan S, Tienda SM, Nahotko DA, Li G, Blaženović I, Lastra RR, Curtis M, Yamada SD, Perets R, McGregor S, Andrade J, Fiehn O, Moellering RE, Mann M, Lengyel E. Metabolic reprogramming of the stromal epigenome in ovarian cancer metastasis. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.lb240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mark A Eckert
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - Fabian Coscia
- Department of Proteomics and Signal TransductionMax Planck Institute of BiochemistryMartinsriedGermany
| | | | | | | | - Shawn Pan
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - Samantha M Tienda
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - Dominik A Nahotko
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - Gang Li
- ChemistryUniversity of ChicagoChicagoIL
| | - Ivana Blaženović
- West Coast Metabolomics Center, University of California, DavisDavisCA
| | | | - Marion Curtis
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - S. Diane Yamada
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
| | - Ruth Perets
- Division of OncologyRambam Health Care CampusHaifaIsrael
| | | | - Jorge Andrade
- Center for Research InformaticsUniversity of ChicagoChicagoIL
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California, DavisDavisCA
| | | | - Matthias Mann
- Department of Proteomics and Signal TransductionMax Planck Institute of BiochemistryMartinsriedGermany
| | - Ernst Lengyel
- Obstetrics & Gynecology/Section of Gynecologic OncologyUniversity of ChicagoChicagoIL
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Eckert MA, Vaden KI, Dubno JR. Age-Related Hearing Loss Associations With Changes in Brain Morphology. Trends Hear 2019; 23:2331216519857267. [PMID: 31213143 PMCID: PMC6585256 DOI: 10.1177/2331216519857267] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 03/12/2019] [Accepted: 05/09/2019] [Indexed: 12/21/2022] Open
Abstract
Age-related hearing loss has been associated with varied auditory cortex morphology in human neuroimaging studies. These findings have suggested that peripheral auditory system declines cause changes in brain morphology but could also be due to latent variables that affect the auditory periphery and brain. The current longitudinal study was designed to evaluate these explanations for pure-tone threshold and brain morphology associations. Thirty adults (mean age at Time 1 = 64.12 ± 10.32 years) were studied at two time points (average duration between visits = 2.62 ± 0.81 years). Small- to medium-effect size associations were observed between high-frequency pure-tone thresholds and auditory cortex gray matter volume at each time point. Although there were significant longitudinal changes in low- and high-frequency hearing measures and brain morphology, those longitudinal changes were not significantly correlated across participants. High-frequency hearing measures at Time 1 were significantly related to more lateral ventricle expansion, such that participants with higher measures exhibited larger increases in ventricle size. This ventricle effect was statistically independent of high-frequency hearing associations with auditory cortex morphology. Together, these results indicate that there are at least two mechanisms for associations between age-related hearing loss and brain morphology. Potential explanations for a direct hearing loss effect on brain morphology, as well as latent variables that likely affect both the inner ear and brain, are discussed.
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Affiliation(s)
- Mark A. Eckert
- Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Kenneth I. Vaden
- Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Judy R. Dubno
- Department of Otolaryngology—Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
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Worley ML, Schlosser RJ, Soler ZM, Dubno JR, Eckert MA. Age-related differences in olfactory cleft volume in adults: A computational volumetric study. Laryngoscope 2018; 129:E55-E60. [PMID: 30329151 DOI: 10.1002/lary.27505] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2018] [Indexed: 01/28/2023]
Abstract
OBJECTIVES/HYPOTHESIS There is a growing need to understand the underlying mechanisms of age-related olfactory dysfunction with the increasing proportion of older adults over the next 20 years. Despite the importance of olfactory cleft (OC) volumes on odorant deposition and olfactory function, little is known about age-related changes to OC volume. The goal of this study was to use automated techniques in a cross-sectional design to investigate the extent to which OC volumes vary with age and determine the spatial specificity of any age-related effects. STUDY DESIGN Retrospective cross-sectional study. METHODS Deformation-based morphometry was utilized to measure OC and sinus volumes in two independent samples of 101 (Medical University of South Carolina [MUSC] sample) and 95 (Hammersmith sample) healthy adults who underwent T1-weighted magnetic resonance imaging, with the Hammersmith sample serving as a replication sample. RESULTS The mean age of the MUSC and Hammersmith samples were 54.9 ± 17.0 years and 52.1 years ± 15.7 years, respectively. In both samples, there was a significant positive association between age and OC volume that occurred at a constant rate across the lifespan (Cohen's f2 of 0.065 in the MUSC sample and 0.110 in the Hammersmith sample). Age-associated OC volume increases occurred in conjunction with decreases in sinus volumes as well as increases in non-OC nasal cavity volumes. CONCLUSIONS In this cross-sectional study, there is an increase in OC volume with increasing age that occurs in the context of broad age-associated differences in sinonasal anatomy. Future studies should investigate the impact of age-associated differences in intranasal anatomy on nasal airflow, odorant deposition, and olfactory function. LEVEL OF EVIDENCE 4 Laryngoscope, 129:E55-E60, 2019.
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Affiliation(s)
- Mitchell L Worley
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A
| | - Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A
| | - Zachary M Soler
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A
| | - Judy R Dubno
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, U.S.A
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Liu J, Eckert MA, Harada BT, Liu SM, Lu Z, Yu K, Tienda SM, Chryplewicz A, Zhu AC, Yang Y, Huang JT, Chen SM, Xu ZG, Leng XH, Yu XC, Cao J, Zhang Z, Liu J, Lengyel E, He C. m 6A mRNA methylation regulates AKT activity to promote the proliferation and tumorigenicity of endometrial cancer. Nat Cell Biol 2018; 20:1074-1083. [PMID: 30154548 PMCID: PMC6245953 DOI: 10.1038/s41556-018-0174-4] [Citation(s) in RCA: 517] [Impact Index Per Article: 86.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 07/19/2018] [Indexed: 12/13/2022]
Abstract
N6-methyladenosine (m6A) mRNA methylation is a gene regulatory mechanism affecting cell differentiation and proliferation in development and cancer. To study the roles of m6A mRNA methylation in cell proliferation and tumorigenicity, we investigated human endometrial cancer in which a hotspot R298P mutation is present in a key component of the methyltransferase complex (METTL14). We found ~70% of endometrial tumors exhibit reductions in m6A methylation that are likely due to either this METTL14 mutation or reduced expression of METTL3, another component of the methyltransferase complex. These changes lead to increased proliferation and tumorigenicity of endometrial cancer cells through activation of the AKT pathway. Reductions in m6A methylation lead to decreased expression of the negative AKT regulator PHLPP2 and increased expression of the positive AKT regulator mTORC2. Together, these results reveal reduced m6A mRNA methylation as an oncogenic mechanism in endometrial cancer and identify m6A methylation as a regulator of AKT signaling.
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Affiliation(s)
- Jun Liu
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.,Howard Hughes Medical Institute, Chicago, IL, USA
| | - Mark A Eckert
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, IL, USA
| | - Bryan T Harada
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.,Howard Hughes Medical Institute, Chicago, IL, USA
| | - Song-Mei Liu
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhike Lu
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.,Howard Hughes Medical Institute, Chicago, IL, USA
| | - Kangkang Yu
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.,Howard Hughes Medical Institute, Chicago, IL, USA.,College of Chemistry, Sichuan University, Chengdu, China
| | - Samantha M Tienda
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, IL, USA
| | - Agnieszka Chryplewicz
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, IL, USA
| | - Allen C Zhu
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA.,Howard Hughes Medical Institute, Chicago, IL, USA.,Committee on Cancer Biology and Medical Scientist Training Program, The University of Chicago, Chicago, IL, USA
| | - Ying Yang
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jing-Tao Huang
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Shao-Min Chen
- Center for Gene Diagnosis, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhi-Gao Xu
- Department of Pathology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xiao-Hua Leng
- Hubei Key Laboratory of Tumor Biological Behaviors & Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xue-Chen Yu
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jie Cao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | - Zezhou Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | - Jianzhao Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, IL, USA.
| | - Chuan He
- Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, USA. .,Howard Hughes Medical Institute, Chicago, IL, USA. .,Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, USA.
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Abstract
Children with reading disability exhibit varied deficits in reading and cognitive abilities that contribute to their reading comprehension problems. Some children exhibit primary deficits in phonological processing, while others can exhibit deficits in oral language and executive functions that affect comprehension. This behavioral heterogeneity is problematic when missing data prevent the characterization of different reading profiles, which often occurs in retrospective data sharing initiatives without coordinated data collection. Here we show that reading profiles can be reliably identified based on Random Forest classification of incomplete behavioral datasets, after the missForest method is used to multiply impute missing values. Results from simulation analyses showed that reading profiles could be accurately classified across degrees of missingness (e.g., ∼5% classification error for 30% missingness across the sample). The application of missForest to a real multi-site dataset with missingness (n = 924) showed that reading disability profiles significantly and consistently differed in reading and cognitive abilities for cases with and without missing data. The results of validation analyses indicated that the reading profiles (cases with and without missing data) exhibited significant differences for an independent set of behavioral variables that were not used to classify reading profiles. Together, the results show how multiple imputation can be applied to the classification of cases with missing data and can increase the integrity of results from multi-site open access datasets.
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Affiliation(s)
- Mark A. Eckert
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, United States
| | - Kenneth I. Vaden
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, United States
| | - Mulugeta Gebregziabher
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, United States
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Ganjaei KG, Soler ZM, Mappus ED, Taylor RJ, Worley ML, Mulligan JK, Mattos JL, Rowan NR, Garcia GJM, Dubno JR, Eckert MA, Matthews LJ, Schlosser RJ. Novel Radiographic Assessment of the Cribriform Plate. Am J Rhinol Allergy 2018; 32:175-180. [PMID: 29660990 DOI: 10.1177/1945892418768159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background The cribriform plate (CP) is a common site of spontaneous cerebrospinal fluid (SCSF) leaks. Radiographic assessment of the anterior and lateral skull base has shown thinner bone in patients with SCSFs; however, prior assessment of the CP has required postmortem cadaver dissection. Objective To develop novel radiographic techniques to assess the anatomy of the CP. Methods Computed tomography (CT) scans were performed on cadaveric specimens. Bone density and anatomy of a predefined volume of interest of the posterior CP were assessed by two independent reviewers. CT assessment of olfactory foramina was also performed and validated using anatomic dissection of cadaver specimens. Results Interclass correlation coefficients (ICCs) for measuring the same volume of each CP was 0.96, confirming reproducible anatomic localization. Cadaver CPs had a mean Hounsfield units of 263, indicating a mix of bone and soft tissue, and ICC was 0.98, confirming reproducible radiographic measurements. Optimal CT estimates of bone composition of CPs averaged 85% (range 76% to 96%) compared to actual anatomic dissection which averaged 84% bone (range 74% to 91%, r = .690, P = .026). Conclusion Our novel, noninvasive CT method for assessing CP anatomy is reproducible and correlates with anatomic dissection assessing bone composition. The clinical implications of anatomic changes in the CP are an area for further study.
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Affiliation(s)
- Kimia G Ganjaei
- 1 Rutgers-Robert Wood Johnson Medical School, Piscataway, New Jersey.,2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Zachary M Soler
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Elliott D Mappus
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Robert J Taylor
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Mitchell L Worley
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Jennifer K Mulligan
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Jose L Mattos
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina.,3 Department of Otolaryngology-Head and Neck Surgery, University of Virginia, Charlottesville, Virginia
| | - Nicholas R Rowan
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Guilherme J M Garcia
- 4 Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Judy R Dubno
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Mark A Eckert
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Lois J Matthews
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Rodney J Schlosser
- 2 Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
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Gebregziabher M, Eckert MA, Matthews LJ, Teklehaimanot AA, Dubno JR. Joint modeling of multivariate hearing thresholds measured longitudinally at multiple frequencies. COMMUN STAT-THEOR M 2018; 47:5418-5434. [PMID: 30983686 DOI: 10.1080/03610926.2017.1395045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Pure-tone thresholds are used to estimate hearing acuity and, when measured longitudinally, can characterize age-related changes in hearing. Measured at multiple-frequencies, multiple-irregular time points, for right and left ears, these longitudinal studies of age-related hearing loss produce data of inherent complexity due to: 1) multivariate outcomes at different frequencies; 2) longitudinal measurements taken at subject-specific time intervals; and 3) inter-ear correlations due to clustering and nesting. To address limitations in existing methods, we propose a multivariate generalized linear mixed model(mGLMM) and assess its performance. We demonstrate its application using a unique dataset from a cohort study of age-related hearing loss.
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Affiliation(s)
- Mulugeta Gebregziabher
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, USA
| | - Mark A Eckert
- Department of Otolaryngology, Medical University of South Carolina, Charleston, USA
| | - Lois J Matthews
- Department of Otolaryngology, Medical University of South Carolina, Charleston, USA
| | - Abeba A Teklehaimanot
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, USA
| | - Judy R Dubno
- Department of Otolaryngology, Medical University of South Carolina, Charleston, USA
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40
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Chiarello C, Vaden KI, Eckert MA. Orthographic influence on spoken word identification: Behavioral and fMRI evidence. Neuropsychologia 2018; 111:103-111. [PMID: 29371094 PMCID: PMC5866781 DOI: 10.1016/j.neuropsychologia.2018.01.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 12/20/2017] [Accepted: 01/21/2018] [Indexed: 10/18/2022]
Abstract
The current study investigated behavioral and neuroimaging evidence for orthographic influences on auditory word identification. To assess such influences, the proportion of similar sounding words (i.e. phonological neighbors) that were also spelled similarly (i.e., orthographic neighbors) was computed for each auditorily presented word as the Orthographic-to-Phonological Overlap Ratio (OPOR). Speech intelligibility was manipulated by presenting monosyllabic words in multi-talker babble at two signal-to-noise ratios: + 3 and + 10 dB SNR. Identification rates were lower for high overlap words in the challenging + 3 dB SNR condition. In addition, BOLD contrast increased with OPOR at the more difficult SNR, and decreased with OPOR under more favorable SNR conditions. Both voxel-based and region of interest analyses demonstrated robust effects of OPOR in several cingulo-opercular regions. However, contrary to prior theoretical accounts, no task-related activity was observed in posterior regions associated with phonological or orthographic processing. We suggest that, when processing is difficult, orthographic-to-phonological feature overlap increases the availability of competing responses, which then requires additional support from domain general performance systems in order to produce a single response.
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Affiliation(s)
- Christine Chiarello
- Department of Psychology, University of California, Riverside, CA 92521, United States.
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Abstract
Although the median survival for epithelial ovarian cancer (EOC) is <5years, approximately 15% of patients will survive for >10years. A better understanding of these exceptional responders could reveal opportunities to improve the dismal prognosis of most EOC patients. In this review, we examine the clinical and genomic features that have been associated with long-term survival, which is generally defined as survival of >7-10years after initial diagnosis. Clinical features influencing long-term survival have been best reported in large retrospective population-based studies. These studies find that long-term survival is associated with previously validated prognostic factors, including younger age at diagnosis, earlier clinicopathologic stage, lower grade, non-serous histology, absence of ascites, primary debulking surgery, and optimal cytoreduction at primary surgery. Duration of survival after a recurrence also contributes to long-term survival and depends both on recurrence location and response to subsequent chemotherapy or surgery. Germline BRCA mutations, although associated with short-term chemosensitivity, do not appear to improve long-term survival. Unfortunately, the relative lack of recurrent somatic mutations in EOC has made the identification of genomic signatures associated with long-term survival difficult. Although six independent gene expression analyses of long-term survivors (LTS) have identified signatures associated with prolonged survival, different gene sets are identified in each study. Genes differentially expressed in tumors of LTS are broadly involved in cell proliferation, tumor-stromal interactions, the cytoskeleton, metabolism of nutrients, and immune/stress response. We anticipate that consistent selection of control and LTS groups, combined with the use of emerging transcriptomic, epigenomic, and proteomic platforms, is likely to identify conserved features associated with long-term survival. Further elucidating the factors contributing to long-term survival has the potential to contribute to our understanding of the biology of ovarian cancer, with the goal of improving the survival of all EOC patients.
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Affiliation(s)
- Claire Hoppenot
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Mark A Eckert
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Samantha M Tienda
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA.
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Hoppenot C, Eckert MA, Tienda SM, Lengyel E. Who are the long-term survivors of high grade serous ovarian cancer? Gynecol Oncol 2017; 148:204-212. [PMID: 29128106 DOI: 10.1016/j.ygyno.2017.10.032] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 10/25/2017] [Accepted: 10/26/2017] [Indexed: 12/30/2022]
Abstract
Although the median survival for epithelial ovarian cancer (EOC) is <5years, approximately 15% of patients will survive for >10years. A better understanding of these exceptional responders could reveal opportunities to improve the dismal prognosis of most EOC patients. In this review, we examine the clinical and genomic features that have been associated with long-term survival, which is generally defined as survival of >7-10years after initial diagnosis. Clinical features influencing long-term survival have been best reported in large retrospective population-based studies. These studies find that long-term survival is associated with previously validated prognostic factors, including younger age at diagnosis, earlier clinicopathologic stage, lower grade, non-serous histology, absence of ascites, primary debulking surgery, and optimal cytoreduction at primary surgery. Duration of survival after a recurrence also contributes to long-term survival and depends both on recurrence location and response to subsequent chemotherapy or surgery. Germline BRCA mutations, although associated with short-term chemosensitivity, do not appear to improve long-term survival. Unfortunately, the relative lack of recurrent somatic mutations in EOC has made the identification of genomic signatures associated with long-term survival difficult. Although six independent gene expression analyses of long-term survivors (LTS) have identified signatures associated with prolonged survival, different gene sets are identified in each study. Genes differentially expressed in tumors of LTS are broadly involved in cell proliferation, tumor-stromal interactions, the cytoskeleton, metabolism of nutrients, and immune/stress response. We anticipate that consistent selection of control and LTS groups, combined with the use of emerging transcriptomic, epigenomic, and proteomic platforms, is likely to identify conserved features associated with long-term survival. Further elucidating the factors contributing to long-term survival has the potential to contribute to our understanding of the biology of ovarian cancer, with the goal of improving the survival of all EOC patients.
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Affiliation(s)
- Claire Hoppenot
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Mark A Eckert
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Samantha M Tienda
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology, Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA.
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Eckert MA, Vaden KI, Maxwell AB, Cute SL, Gebregziabher M, Berninger VW. Common Brain Structure Findings Across Children with Varied Reading Disability Profiles. Sci Rep 2017; 7:6009. [PMID: 28729533 PMCID: PMC5519686 DOI: 10.1038/s41598-017-05691-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 05/31/2017] [Indexed: 11/12/2022] Open
Abstract
Dyslexia is a developmental disorder in reading that exhibits varied patterns of expression across children. Here we examined the degree to which different kinds of reading disabilities (defined as profiles or patterns of reading problems) contribute to brain morphology results in Jacobian determinant images that represent local brain shape and volume. A matched-pair brain morphometry approach was used to control for confounding from brain size and research site effects in this retrospective multi-site study of 134 children from eight different research sites. Parietal operculum, corona radiata, and internal capsule differences between cases and controls were consistently observed across children with evidence of classic dyslexia, specific comprehension deficit, and language learning disability. Thus, there can be common brain morphology findings across children with quite varied reading disability profiles that we hypothesize compound the developmental difficulties of children with unique reading disability profiles and reasons for their reading disability.
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Affiliation(s)
- Mark A Eckert
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, 29425, USA.
| | - Kenneth I Vaden
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Amanda B Maxwell
- Department of Otolaryngology - Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, 29425, USA
| | | | - Mulugeta Gebregziabher
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Virginia W Berninger
- Department of Educational Psychology, University of Washington, Seattle, WA, 98105, USA
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Abstract
Correctly understood speech in difficult listening conditions is often difficult to remember. A long-standing hypothesis for this observation is that the engagement of cognitive resources to aid speech understanding can limit resources available for memory encoding. This hypothesis is consistent with evidence that speech presented in difficult conditions typically elicits greater activity throughout cingulo-opercular regions of frontal cortex that are proposed to optimize task performance through adaptive control of behavior and tonic attention. However, successful memory encoding of items for delayed recognition memory tasks is consistently associated with increased cingulo-opercular activity when perceptual difficulty is minimized. The current study used a delayed recognition memory task to test competing predictions that memory encoding for words is enhanced or limited by the engagement of cingulo-opercular activity during challenging listening conditions. An fMRI experiment was conducted with twenty healthy adult participants who performed a word identification in noise task that was immediately followed by a delayed recognition memory task. Consistent with previous findings, word identification trials in the poorer signal-to-noise ratio condition were associated with increased cingulo-opercular activity and poorer recognition memory scores on average. However, cingulo-opercular activity decreased for correctly identified words in noise that were not recognized in the delayed memory test. These results suggest that memory encoding in difficult listening conditions is poorer when elevated cingulo-opercular activity is not sustained. Although increased attention to speech when presented in difficult conditions may detract from more active forms of memory maintenance (e.g., sub-vocal rehearsal), we conclude that task performance monitoring and/or elevated tonic attention supports incidental memory encoding in challenging listening conditions.
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Affiliation(s)
- Kenneth I Vaden
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, United States.
| | - Susan Teubner-Rhodes
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, United States
| | - Jayne B Ahlstrom
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, United States
| | - Judy R Dubno
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, United States
| | - Mark A Eckert
- Hearing Research Program, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, United States.
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Eckert MA, Coscia F, Pan S, Chiang CY, McGregor S, Lastra R, Yamada SD, Mann M, Lengyel E. Abstract TMEM-118: ROLES OF T-LAK CELL-ORIGINATED KINASE (TOPK) AND THE MICROENVIRONMENT IN DRIVING OVARIAN CANCER PROGRESSION. Clin Cancer Res 2017. [DOI: 10.1158/1557-3265.ovcasymp16-tmem-118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Ovarian cancer (OvCa) therapy is confounded by late detection and a lack of effective therapeutics. After debulking surgery, most patients initially respond to platinum-based chemotherapeutics, however their tumors inevitably develop resistance and recur. Developing new treatments for OvCa will depend on a thorough understanding of OvCa biology. We recently identified T-LAK cell-originated kinase (TOPK), a serine-threonine kinase, as highly expressed in OvCa. A member of the cancer/testis antigen (CTA) family, TOPK is induced by mutant TP53 and is expressed in early, in situ serous tubal intraepithelial carcinoma lesions. Targeting TOPK with a small-molecule inhibitor in a mouse model of OvCa led to significant reductions in tumor burden. To better understand the interplay between TOPK and the tumor and stroma in ovarian cancer progression, we performed compartment-resolved, quantitative shotgun proteomics on microdissected tumor and stromal samples across a hypothetical progression series of ovarian cancer from in situ STIC to omental metastases. With a highly-sensitive platform, we were able to accurately quantify proteins across the progression series and confirmed expression of known tumor and stromal markers in the data set. Interestingly, we observed a conserved stromal response associated with metastasis. This signature included both genes known to play a role in cancer-associated fibroblasts, as well as proteins with no previously described roles in the tumor stroma. Many components of the signature are also representative of the previously described “mesenchymal” subgroup of ovarian cancer. In vitro and in vivo functional assays have confirmed essential roles for several of these proteins in regulating the cancer-associated fibroblast phenotype. This work establishes TOPK as a potential therapeutic target for ovarian cancer and emphasizes the importance of compartment resolved studies in understanding the individual roles of the tumor and stroma in ovarian cancer progression.
Citation Format: Mark A. Eckert, Fabian Coscia, Shawn Pan, Chun-Yi Chiang, Stephanie McGregor, Ricardo Lastra, S. Diane Yamada, Matthias Mann, and Ernst Lengyel. ROLES OF T-LAK CELL-ORIGINATED KINASE (TOPK) AND THE MICROENVIRONMENT IN DRIVING OVARIAN CANCER PROGRESSION [abstract]. In: Proceedings of the 11th Biennial Ovarian Cancer Research Symposium; Sep 12-13, 2016; Seattle, WA. Philadelphia (PA): AACR; Clin Cancer Res 2017;23(11 Suppl):Abstract nr TMEM-118.
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Affiliation(s)
- Mark A. Eckert
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
| | - Fabian Coscia
- 2Max Planck Institute for Biochemistry, Martinsried, Germany
| | - Shawn Pan
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
| | - Chun-Yi Chiang
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
| | | | - Ricardo Lastra
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
| | - S. Diane Yamada
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
| | - Matthias Mann
- 2Max Planck Institute for Biochemistry, Martinsried, Germany
| | - Ernst Lengyel
- 1Department of Obstetrics and Gynecology, University of Chicago, USA
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Eckert MA, Santiago-Medina M, Lwin TM, Kim J, Courtneidge SA, Yang J. ADAM12 induction by Twist1 promotes tumor invasion and metastasis via regulation of invadopodia and focal adhesions. J Cell Sci 2017; 130:2036-2048. [PMID: 28468988 DOI: 10.1242/jcs.198200] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 04/28/2017] [Indexed: 01/07/2023] Open
Abstract
The Twist1 transcription factor promotes tumor invasion and metastasis by inducing epithelial-mesenchymal transition (EMT) and invadopodia-mediated extracellular matrix (ECM) degradation. The critical transcription targets of Twist1 for mediating these events remain to be uncovered. Here, we report that Twist1 strongly induces expression of a disintegrin and metalloproteinase 12 (ADAM12). We observed that the expression levels of Twist1 mRNA and ADAM12 mRNA are tightly correlated in human breast tumors. Knocking down ADAM12 blocked cell invasion in a 3D mammary organoid culture. Suppression of ADAM12 also inhibited Twist1-induced tumor invasion and metastasis in human breast tumor xenografts, without affecting primary tumor formation. Mechanistically, knockdown of ADAM12 in breast cancer cells significantly reduced invadopodia formation and matrix degradation, and simultaneously increased overall cell adhesion to the ECM. Live-imaging analysis showed that knockdown of ADAM12 significantly inhibited focal adhesion turnover. Mechanistically, both the disintegrin and metalloproteinase domains of ADAM12 are required for its function at invadopodia, whereas the metalloproteinase domain is dispensable for its function at focal adhesions. Taken together, these data suggest that ADAM12 plays a crucial role in tumor invasion and metastasis by regulating both invadopodia and focal adhesions.
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Affiliation(s)
- Mark A Eckert
- Department of Pharmacology, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA, 92093-0819, USA.,The Molecular Pathology Graduate Program, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA 92093-0819, USA
| | - Miguel Santiago-Medina
- Department of Pharmacology, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA, 92093-0819, USA
| | - Thinzar M Lwin
- Department of Pharmacology, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA, 92093-0819, USA
| | - Jihoon Kim
- Division of Biomedical Informatics, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA 92093-0819, USA
| | - Sara A Courtneidge
- Departments of Cell, Developmental & Cancer Biology and Biomedical Engineering, Knight Cancer Institute, Oregon Health and Science University, 2730 SW Moody Avenue, Portland, OR 97201, USA
| | - Jing Yang
- Department of Pharmacology, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA, 92093-0819, USA .,Department of Pediatrics, University of California, San Diego, Moores Cancer Center, 3855 Health Sciences Drive, La Jolla, CA, 92093-0819, USA
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Chiyoda T, Hart PC, Eckert MA, McGregor SM, Lastra RR, Hamamoto R, Nakamura Y, Yamada SD, Olopade OI, Lengyel E, Romero IL. Loss of BRCA1 in the Cells of Origin of Ovarian Cancer Induces Glycolysis: A Window of Opportunity for Ovarian Cancer Chemoprevention. Cancer Prev Res (Phila) 2017; 10:255-266. [PMID: 28264838 PMCID: PMC5425093 DOI: 10.1158/1940-6207.capr-16-0281] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/06/2017] [Accepted: 02/27/2017] [Indexed: 12/21/2022]
Abstract
Mutations in the breast cancer susceptibility gene 1 (BRCA1) are associated with an increased risk of developing epithelial ovarian cancer. However, beyond the role of BRCA1 in DNA repair, little is known about other mechanisms by which BRCA1 impairment promotes carcinogenesis. Given that altered metabolism is now recognized as important in the initiation and progression of cancer, we asked whether the loss of BRCA1 changes metabolism in the cells of origin of ovarian cancer. The findings show that silencing BRCA1 in ovarian surface epithelial and fallopian tube cells increased glycolysis. Furthermore, when these cells were transfected with plasmids carrying deleterious BRCA1 mutations (5382insC or the P1749R), there was an increase in hexokinase-2 (HK2), a key glycolytic enzyme. This effect was mediated by MYC and the STAT3. To target the metabolic phenotype induced by loss of BRCA1, a drug-repurposing approach was used and aspirin was identified as an agent that counteracted the increase in HK2 and the increase in glycolysis induced by BRCA1 impairment. Evidence from this study indicates that the tumor suppressor functions of BRCA1 extend beyond DNA repair to include metabolic endpoints and identifies aspirin as an ovarian cancer chemopreventive agent capable of reversing the metabolic derangements caused by loss of BRCA1. Cancer Prev Res; 10(4); 255-66. ©2017 AACR.
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Affiliation(s)
- Tatsuyuki Chiyoda
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois
| | - Peter C Hart
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois
| | - Mark A Eckert
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois
| | | | - Ricardo R Lastra
- Department of Pathology, The University of Chicago, Chicago, Illinois
| | - Ryuji Hamamoto
- Department of Medicine, Section of Hematology/Oncology, The University of Chicago, Chicago, Illinois
| | - Yusuke Nakamura
- Department of Medicine, Section of Hematology/Oncology, The University of Chicago, Chicago, Illinois
| | - S Diane Yamada
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois
| | - Olufunmilayo I Olopade
- Department of Medicine, Section of Hematology/Oncology, The University of Chicago, Chicago, Illinois
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois
| | - Iris L Romero
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, The University of Chicago, Chicago, Illinois.
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Witton C, Eckert MA, Stanford IM, Gascoyne LE, Furlong PL, Worthen SF, Hillebrand A. The auditory evoked-gamma response and its relation with the N1m. Hear Res 2017; 348:78-86. [PMID: 28237547 DOI: 10.1016/j.heares.2017.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/13/2016] [Accepted: 02/03/2017] [Indexed: 10/20/2022]
Abstract
This study explored the patterns of oscillatory activity that underpin the N1m auditory evoked response. Evoked gamma activity is a small and relatively rarely-reported component of the auditory evoked response, and the objective of this work was to determine how this component relates to the larger and more prolonged changes in lower frequency bands. An event-related beamformer analysis of MEG data from monaural click stimulation was used to reconstruct volumetric images and virtual electrode time series. Group analysis of localisations showed that activity in the gamma band originated from a source that was more medial than those for activity in the theta-to-beta band, and virtual-electrode analysis showed that the source of the gamma activity could be statistically dissociated from the lower-frequency response. These findings are in accordance with separate functional roles for the activity in each frequency band, and provide evidence that the oscillatory activity that underpins the auditory evoked response may contain important information about the physiological basis of the macroscopic signals recorded by MEG in response to auditory stimulation.
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Affiliation(s)
- Caroline Witton
- Aston Brain Centre, Aston University, Birmingham, B4 7ET, UK.
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Ian M Stanford
- Aston Brain Centre, Aston University, Birmingham, B4 7ET, UK
| | | | - Paul L Furlong
- Aston Brain Centre, Aston University, Birmingham, B4 7ET, UK
| | - Siân F Worthen
- Aston Brain Centre, Aston University, Birmingham, B4 7ET, UK
| | - Arjan Hillebrand
- Department of Clinical Neurophysiology and Magnetoencephalography Center, VU University Medical Center, 1081 HV, Amsterdam, The Netherlands
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Affiliation(s)
| | - Mark A Eckert
- Department of Otolaryngology-Head & Neck Surgery, MUSC, Charleston, SC, USA
| | - Kenneth I Vaden
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA
| | - Timothy D Johnson
- Department of Otolaryngology-Head & Neck Surgery, MUSC, Charleston, SC, USA
| | - Andrew B Lawson
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA
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Eckert MA, Matthews LJ, Dubno JR. Self-Assessed Hearing Handicap in Older Adults With Poorer-Than-Predicted Speech Recognition in Noise. J Speech Lang Hear Res 2017; 60:251-262. [PMID: 28060993 PMCID: PMC5533557 DOI: 10.1044/2016_jslhr-h-16-0011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 07/07/2016] [Indexed: 05/12/2023]
Abstract
PURPOSE Even older adults with relatively mild hearing loss report hearing handicap, suggesting that hearing handicap is not completely explained by reduced speech audibility. METHOD We examined the extent to which self-assessed ratings of hearing handicap using the Hearing Handicap Inventory for the Elderly (HHIE; Ventry & Weinstein, 1982) were significantly associated with measures of speech recognition in noise that controlled for differences in speech audibility. RESULTS One hundred sixty-two middle-aged and older adults had HHIE total scores that were significantly associated with audibility-adjusted measures of speech recognition for low-context but not high-context sentences. These findings were driven by HHIE items involving negative feelings related to communication difficulties that also captured variance in subjective ratings of effort and frustration that predicted speech recognition. The average pure-tone threshold accounted for some of the variance in the association between the HHIE and audibility-adjusted speech recognition, suggesting an effect of central and peripheral auditory system decline related to elevated thresholds. CONCLUSION The accumulation of difficult listening experiences appears to produce a self-assessment of hearing handicap resulting from (a) reduced audibility of stimuli, (b) declines in the central and peripheral auditory system function, and (c) additional individual variation in central nervous system function.
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