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Curiel Cid RE, Crocco EA, Duara R, Vaillancourt D, Asken B, Armstrong MJ, Adjouadi M, Georgiou M, Marsiske M, Wang WI, Rosselli M, Barker WW, Ortega A, Hincapie D, Gallardo L, Alkharboush F, DeKosky S, Smith G, Loewenstein DA. Different aspects of failing to recover from proactive semantic interference predicts rate of progression from amnestic mild cognitive impairment to dementia. Front Aging Neurosci 2024; 16:1336008. [PMID: 38357533 PMCID: PMC10864586 DOI: 10.3389/fnagi.2024.1336008] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/17/2024] [Indexed: 02/16/2024] Open
Abstract
Introduction This study investigated the role of proactive semantic interference (frPSI) in predicting the progression of amnestic Mild Cognitive Impairment (aMCI) to dementia, taking into account various cognitive and biological factors. Methods The research involved 89 older adults with aMCI who underwent baseline assessments, including amyloid PET and MRI scans, and were followed longitudinally over a period ranging from 12 to 55 months (average 26.05 months). Results The findings revealed that more than 30% of the participants diagnosed with aMCI progressed to dementia during the observation period. Using Cox Proportional Hazards modeling and adjusting for demographic factors, global cognitive function, hippocampal volume, and amyloid positivity, two distinct aspects of frPSI were identified as significant predictors of a faster decline to dementia. These aspects were fewer correct responses on a frPSI trial and a higher number of semantic intrusion errors on the same trial, with 29.5% and 31.6 % increases in the likelihood of more rapid progression to dementia, respectively. Discussion These findings after adjustment for demographic and biological markers of Alzheimer's Disease, suggest that assessing frPSI may offer valuable insights into the risk of dementia progression in individuals with aMCI.
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Affiliation(s)
- Rosie E. Curiel Cid
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Elizabeth A. Crocco
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Ranjan Duara
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Neurology and The Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States
| | - David Vaillancourt
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Breton Asken
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Melissa J. Armstrong
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- University of Florida College of Medicine, Gainesville, FL, United States
| | - Malek Adjouadi
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Clinical and Health Psychology, University of Florida, Miami, FL, United States
| | - Mike Georgiou
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Michael Marsiske
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Clinical and Health Psychology, University of Florida, Miami, FL, United States
| | - Wei-in Wang
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Clinical and Health Psychology, University of Florida, Miami, FL, United States
| | - Monica Rosselli
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Psychology, Florida Atlantic University, Boca Raton, FL, United States
| | - William W. Barker
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Wien Center for Alzheimer’s Disease and Memory Disorders, Mount Sinai Medical Center, Miami, FL, United States
| | - Alexandra Ortega
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Diana Hincapie
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Liz Gallardo
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Feras Alkharboush
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Steven DeKosky
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Neurology and McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Glenn Smith
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Department of Clinical and Health Psychology, University of Florida, Miami, FL, United States
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
| | - David A. Loewenstein
- Florida Alzheimer’s Disease Research Center, Miami, FL, United States
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
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Curiel Cid RE, Ortega A, Crocco EA, Hincapie D, McFarland KN, Duara R, Vaillancourt D, DeKosky ST, Smith G, Sfakianaki E, Rosselli M, Barker WW, Adjouadi M, Barreto Y, Feito Y, Loewenstein DA. Semantic intrusion errors are associated with plasma Ptau-181 among persons with amnestic mild cognitive impairment who are amyloid positive. Front Neurol 2023; 14:1179205. [PMID: 37602238 PMCID: PMC10436611 DOI: 10.3389/fneur.2023.1179205] [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: 03/03/2023] [Accepted: 07/06/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction Semantic intrusion errors (SI) have distinguished between those with amnestic Mild Cognitive Impairment (aMCI) who are amyloid positive (A+) versus negative (A-) on positron emission tomography (PET). Method This study examines the association between SI and plasma - based biomarkers. One hundred and twenty-eight participants received SiMoA derived measures of plasma pTau-181, ratio of two amyloid-β peptide fragments (Aβ42/Aβ40), Neurofilament Light protein (NfL), Glial Fibrillary Acidic Protein (GFAP), ApoE genotyping, and amyloid PET imaging. Results The aMCI A+ (n = 42) group had a higher percentage of ApoE ɛ4 carriers, and greater levels of pTau-181 and SI, than Cognitively Unimpaired (CU) A- participants (n = 25). CU controls did not differ from aMCI A- (n = 61) on plasma biomarkers or ApoE genotype. Logistic regression indicated that ApoE ɛ4 positivity, pTau-181, and SI were independent differentiating predictors (Correct classification = 82.0%; Sensitivity = 71.4%; Specificity = 90.2%) in identifying A+ from A- aMCI cases. Discussion A combination of plasma biomarkers, ApoE positivity and SI had high specificity in identifying A+ from A- aMCI cases.
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Affiliation(s)
- Rosie E. Curiel Cid
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Alexandra Ortega
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Elizabeth A. Crocco
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Diana Hincapie
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Karen N. McFarland
- Department of Neurology and the Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States
| | - Ranjan Duara
- Department of Neurology and the Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States
| | - David Vaillancourt
- Department of Applied Physiology and Kinesiology, Gainesville, FL, United States
| | - Steven T. DeKosky
- Department of Neurology and McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Glenn Smith
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, United States
| | - Efrosyni Sfakianaki
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Monica Rosselli
- Department of Psychology, Florida Atlantic University, Boca Raton, FL, United States
| | - Warren W. Barker
- Wien Center for Alzheimer’s Disease and Memory Disorders, Mount Sinai Medical Center, Miami, FL, United States
| | - Malek Adjouadi
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
| | - Yarlenis Barreto
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Yuleidys Feito
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - David A. Loewenstein
- Center for Cognitive Neuroscience and Aging, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
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Nagaraja N, DeKosky S, Duara R, Kong L, Wang WE, Vaillancourt D, Albayram M. Imaging features of small vessel disease in cerebral amyloid angiopathy among patients with Alzheimer's disease. Neuroimage Clin 2023; 38:103437. [PMID: 37245492 PMCID: PMC10236212 DOI: 10.1016/j.nicl.2023.103437] [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: 09/06/2022] [Revised: 05/07/2023] [Accepted: 05/14/2023] [Indexed: 05/30/2023]
Abstract
BACKGROUND AND PURPOSE Cerebral small vessel disease biomarkers including white matter hyperintensities (WMH), lacunes, and enlarged perivascular spaces (ePVS) are under investigation to identify those specific to cerebral amyloid angiopathy (CAA). In subjects with Alzheimer's disease (AD), we assessed characteristic features and amounts of WMH, lacunes, and ePVS in four CAA categories (no, mild, moderate and severe CAA) and correlated these with Clinical Dementia Rating sum of boxes (CDRsb) score, ApoE genotype, and neuropathological changes at autopsy. METHODS The study included patients with a clinical diagnosis of dementia due to AD and neuropathological confirmation of AD and CAA in the National Alzheimer's Coordinating Center (NACC) database. The WMH, lacunes, and ePVS were evaluated using semi-quantitative scales. Statistical analyses compared the WMH, lacunes, and ePVS values in the four CAA groups with vascular risk factors and AD severity treated as covariates, and to correlate the imaging features with CDRsb score, ApoE genotype, and neuropathological findings. RESULTS The study consisted of 232 patients, of which 222 patients had FLAIR data available and 105 patients had T2-MRI. Occipital predominant WMH were significantly associated with the presence of CAA (p = 0.007). Among the CAA groups, occipital predominant WMH was associated with severe CAA (β = 1.22, p = 0.0001) compared with no CAA. Occipital predominant WMH were not associated with the CDRsb score performed at baseline (p = 0.68) or at follow-up 2-4 years after the MRI (p = 0.92). There was no significant difference in high grade ePVS in the basal ganglia (p = 0.63) and centrum semiovale (p = 0.95) among the four CAA groups. The WMH and ePVS on imaging did not correlate with the number of ApoE ε4 alleles but the WMH (periventricular and deep) correlated with the presence of infarcts, lacunes and microinfarcts on neuropathology. CONCLUSION Among patients with AD, occipital predominant WMH is more likely to be found in patients with severe CAA than in those without CAA. The high-grade ePVS in centrum semiovale were common in all AD patients regardless of CAA severity.
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Affiliation(s)
- Nandakumar Nagaraja
- Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA.
| | - Steven DeKosky
- Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA; McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - Ranjan Duara
- Department of Neurology, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Lan Kong
- Department of Public Health Sciences, Penn State University College of Medicine, Hershey, PA, USA
| | - Wei-En Wang
- Laboratory for Rehabilitation Neuroscience, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - David Vaillancourt
- Laboratory for Rehabilitation Neuroscience, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Mehmet Albayram
- Department of Radiology, College of Medicine, University of Florida, Gainesville, FL, USA
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Zhang Y, Mitelut C, Arpin DJ, Vaillancourt D, Murphy T, Saxena S. Behavioral Classification of Sequential Neural Activity Using Time Varying Recurrent Neural Networks. bioRxiv 2023:2023.05.10.540244. [PMID: 37214954 PMCID: PMC10197699 DOI: 10.1101/2023.05.10.540244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Shifts in data distribution across time can strongly affect early classification of time-series data. When decoding behavior from neural activity, early detection of behavior may help in devising corrective neural stimulation before the onset of behavior. Recurrent Neural Networks (RNNs) are common models for sequence data. However, standard RNNs are not able to handle data with temporal distributional shifts to guarantee robust classification across time. To enable the network to utilize all temporal features of the neural input data, and to enhance the memory of an RNN, we propose a novel approach: RNNs with time-varying weights, here termed Time-Varying RNNs (TV-RNNs). These models are able to not only predict the class of the time-sequence correctly but also lead to accurate classification earlier in the sequence than standard RNNs. In this work, we focus on early sequential classification of brain-wide neural activity across time using TV-RNNs applied to a variety of neural data from mice and humans, as subjects perform motor tasks. Finally, we explore the contribution of different brain regions on behavior classification using SHapley Additive exPlanation (SHAP) value, and find that the somatosensory and premotor regions play a large role in behavioral classification.
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Affiliation(s)
- Yongxu Zhang
- Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
| | - Catalin Mitelut
- Department of Biology, New York University, New York, NY, USA
| | - David J. Arpin
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - David Vaillancourt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Timothy Murphy
- Department of Psychiatry, Kinsmen Laboratory of Neurological Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shreya Saxena
- Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA
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5
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Nagaraja N, Wang WE, Duara R, DeKosky ST, Vaillancourt D. Mediation of Reduced Hippocampal Volume by Cerebral Amyloid Angiopathy in Pathologically Confirmed Patients with Alzheimer's Disease. J Alzheimers Dis 2023; 93:495-507. [PMID: 37038809 DOI: 10.3233/jad-220624] [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] [Indexed: 04/07/2023]
Abstract
BACKGROUND Hippocampal atrophy in cerebral amyloid angiopathy (CAA) has been reported to be similar to that in Alzheimer's disease (AD). OBJECTIVE To evaluate if CAA pathology partly mediates reduced hippocampal volume in patients with AD. METHODS Patients with a clinical diagnosis of AD and neuropathological confirmation of AD+/-CAA in the National Alzheimer's Coordinating Center database were included in the study. The volumes of temporal lobe structures were calculated on T1-weighted imaging (T1-MRI) using automated FreeSurfer software, from images acquired on average 5 years prior to death. Multivariate regression analysis was performed to compare brain volumes in four CAA groups. The hippocampal volume on T1-MRI was correlated with Clinical Dementia Rating sum of boxes (CDRsb) score, apolipoprotein E (APOE) genotype, and hippocampal atrophy at autopsy. RESULTS The study included 231 patients with no (n = 45), mild (n = 70), moderate (n = 67), and severe (n = 49) CAA. Among the four CAA groups, patients with severe CAA had a smaller mean left hippocampal volume (p = 0.023) but this was not significant when adjusted for APOE ɛ4 (p = 0.07). The left hippocampal volume on MRI correlated significantly with the hippocampal atrophy grading on neuropathology (p = 0.0003). Among patients with severe CAA, the left hippocampal volume on T1-MRI: (a) decreased with an increase in the number of APOE ɛ4 alleles (p = 0.04); but (b) had no evidence of correlation with CDRsb score (p = 0.57). CONCLUSION Severe CAA was associated with smaller left hippocampal volume on T1-MRI up to five years prior to death among patients with neuropathologically confirmed AD. This relationship was dependent on APOE ɛ4 genotype.
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Affiliation(s)
- Nandakumar Nagaraja
- Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Wei-En Wang
- Laboratory for Rehabilitation Neuroscience, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Ranjan Duara
- Department of Neurology, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Steven T DeKosky
- Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - David Vaillancourt
- Laboratory for Rehabilitation Neuroscience, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
- Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
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Tabarestani S, Eslami M, Cabrerizo M, Curiel RE, Barreto A, Rishe N, Vaillancourt D, DeKosky ST, Loewenstein DA, Duara R, Adjouadi M. A Tensorized Multitask Deep Learning Network for Progression Prediction of Alzheimer’s Disease. Front Aging Neurosci 2022; 14:810873. [PMID: 35601611 PMCID: PMC9120529 DOI: 10.3389/fnagi.2022.810873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
With the advances in machine learning for the diagnosis of Alzheimer’s disease (AD), most studies have focused on either identifying the subject’s status through classification algorithms or on predicting their cognitive scores through regression methods, neglecting the potential association between these two tasks. Motivated by the need to enhance the prospects for early diagnosis along with the ability to predict future disease states, this study proposes a deep neural network based on modality fusion, kernelization, and tensorization that perform multiclass classification and longitudinal regression simultaneously within a unified multitask framework. This relationship between multiclass classification and longitudinal regression is found to boost the efficacy of the final model in dealing with both tasks. Different multimodality scenarios are investigated, and complementary aspects of the multimodal features are exploited to simultaneously delineate the subject’s label and predict related cognitive scores at future timepoints using baseline data. The main intent in this multitask framework is to consolidate the highest accuracy possible in terms of precision, sensitivity, F1 score, and area under the curve (AUC) in the multiclass classification task while maintaining the highest similarity in the MMSE score as measured through the correlation coefficient and the RMSE for all time points under the prediction task, with both tasks, run simultaneously under the same set of hyperparameters. The overall accuracy for multiclass classification of the proposed KTMnet method is 66.85 ± 3.77. The prediction results show an average RMSE of 2.32 ± 0.52 and a correlation of 0.71 ± 5.98 for predicting MMSE throughout the time points. These results are compared to state-of-the-art techniques reported in the literature. A discovery from the multitasking of this consolidated machine learning framework is that a set of hyperparameters that optimize the prediction results may not necessarily be the same as those that would optimize the multiclass classification. In other words, there is a breakpoint beyond which enhancing further the results of one process could lead to the downgrading in accuracy for the other.
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Affiliation(s)
- Solale Tabarestani
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
- *Correspondence: Solale Tabarestani,
| | - Mohammad Eslami
- Harvard Ophthalmology AI Lab and Harvard Medical School, Schepens Eye Research Institute, Massachusetts Eye and Ear, Boston, MA, United States
| | - Mercedes Cabrerizo
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
| | - Rosie E. Curiel
- Center for Cognitive Neuroscience and Aging, Psychiatry and Behavioral Sciences, University of Miami School of Medicine, Miami, FL, United States
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
| | - Armando Barreto
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
| | - Naphtali Rishe
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
| | - David Vaillancourt
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Steven T. DeKosky
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
- Department of Neurology, University of Florida, Gainesville, FL, United States
| | - David A. Loewenstein
- Center for Cognitive Neuroscience and Aging, Psychiatry and Behavioral Sciences, University of Miami School of Medicine, Miami, FL, United States
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
- Wien Center for Alzheimer’s Disease and Memory Disorders, Mount Sinai Medical Center, Miami Beach, FL, United States
| | - Ranjan Duara
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
- Wien Center for Alzheimer’s Disease and Memory Disorders, Mount Sinai Medical Center, Miami Beach, FL, United States
| | - Malek Adjouadi
- Center for Advanced Technology and Education, Florida International University, Miami, FL, United States
- Florida Alzheimer’s Disease Research Center, University of Florida, Gainesville, FL, United States
- Malek Adjouadi,
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7
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Jia XZ, Zhao N, Dong HM, Sun JW, Barton M, Burciu R, Carrière N, Cerasa A, Chen BY, Chen J, Coombes S, Defebvre L, Delmaire C, Dujardin K, Esposito F, Fan GG, Di Nardo F, Feng YX, Fling BW, Garg S, Gilat M, Gorges M, Ho SL, Horak FB, Hu X, Hu XF, Huang B, Huang PY, Jia ZJ, Jones C, Kassubek J, Krajcovicova L, Kurani A, Li J, Li Q, Liu AP, Liu B, Liu H, Liu WG, Lopes R, Lou YT, Luo W, Madhyastha T, Mao NN, McAlonan G, McKeown MJ, Pang S, Quattrone A, Rektorova I, Sarica A, Shang HF, Shine JM, Shukla P, Slavicek T, Song XP, Tedeschi G, Tessitore A, Vaillancourt D, Wang J, Wang J, Jane Wang Z, Wei LQ, Wu X, Xu XJ, Yan L, Yang J, Yang WQ, Yao NL, Zhang DL, Zhang JQ, Zhang MM, Zhang YL, Zhou CH, Yan CG, Zuo XN, Hallett M, Wu T, Zang YF. Small P values may not yield robust findings: an example using REST-meta-PD. Sci Bull (Beijing) 2021; 66:2148-2152. [PMID: 36654102 DOI: 10.1016/j.scib.2021.06.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Xi-Ze Jia
- Center for Cognition and Brain Disorders, the Affiliated Hospital, Hangzhou Normal University, Hangzhou 310015, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou 311121, China
| | - Na Zhao
- Center for Cognition and Brain Disorders, the Affiliated Hospital, Hangzhou Normal University, Hangzhou 310015, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou 311121, China
| | - Hao-Ming Dong
- National Basic Science Data Center, Beijing 100190, China; State Key Laboratory of Cognitive Neuroscience and Learning & McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
| | - Jia-Wei Sun
- School of Information and Electronics Technology, Jiamusi University, Jiamusi 154007, China
| | - Marek Barton
- Neuroscience Program, Central European Institute of Technology, CEITEC, Masaryk University, Brno 62500, Czech Republic
| | - Roxana Burciu
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville FL 32611, USA
| | - Nicolas Carrière
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille F-59000, France
| | - Antonio Cerasa
- The Institute for Biomedical Research and Innovation, National Research Council, Mangone CS 87050, Italy
| | - Bo-Yu Chen
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Jun Chen
- Department of Radiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, China
| | - Stephen Coombes
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville FL 32611, USA
| | - Luc Defebvre
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille F-59000, France
| | - Christine Delmaire
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille F-59000, France
| | - Kathy Dujardin
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille F-59000, France
| | - Fabrizio Esposito
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Fisciano, SA 132-84084, Italy
| | - Guo-Guang Fan
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Federica Di Nardo
- Department of Advanced Medical and Surgery Sciences, University of Campania "Luigi Vanvitelli", Caserta 81100, Italy
| | - Yi-Xuan Feng
- Eye Center of the 2nd Affiliated Hospital, Medical College of Zhejiang University, Hangzhou 310020, China; Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou 310020, China
| | - Brett W Fling
- Department of Health and Exercise Science, Colorado State University, Fort Collins CO 80523, USA
| | - Saurabh Garg
- Department of Health and Exercise Science, Colorado State University, Fort Collins CO 80523, USA; Department of Medicine (Neurology) University of British Columbia, Vancouver BC V6T 1B7, Canada
| | - Moran Gilat
- Brain and Mind Center, The University of Sydney, Sydney NSW 2006, Australia
| | - Martin Gorges
- Department of Neurology, Ulm University, Ulm 89081, Germany
| | - Shu-Leong Ho
- Division of Neurology, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong 999077, China
| | - Fay B Horak
- Department of Neurology, School of Medicine, Oregon Health & Science University, Oregon 97239-3098, USA; VA Portland Health Care System, Portland OR 97239, USA
| | - Xiao Hu
- Department of Radiology, The Affiliated Brain Hospital with Nanjing Medical University, Nanjing 210029, China
| | - Xiao-Fei Hu
- Department of Radiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Biao Huang
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Pei-Yu Huang
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Ze-Juan Jia
- Graduate School of Hebei Medical University, Shijiazhuang 50017, China
| | - Christina Jones
- Pacific Parkinson's Research Centre, University of British Columbia, Vancouver BC V6E 2M6, Canada; Department of Medicine (Neurology) University of British Columbia, Vancouver BC V6T 1B7, Canada
| | - Jan Kassubek
- Department of Neurology, Ulm University, Ulm 89081, Germany
| | - Lenka Krajcovicova
- Neuroscience Program, Central European Institute of Technology, CEITEC, Masaryk University, Brno 62500, Czech Republic
| | - Ajay Kurani
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago IL 60611, USA
| | - Jing Li
- Department of Neurology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Qing Li
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China
| | - Ai-Ping Liu
- Department of Electrical and Computer Engineering, University of British Columbia, Vancouver BC V6T 1Z4, Canada
| | - Bo Liu
- Department of Radiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, China
| | - Hu Liu
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Wei-Guo Liu
- Department of Neurology, The Affiliated Brain Hospital With Nanjing Medical University, Nanjing 210029, China
| | - Renaud Lopes
- Univ. Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille F-59000, France
| | - Yu-Ting Lou
- Department of Paediatrics, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Wei Luo
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Tara Madhyastha
- Department of Radiology, University of Washington, Seattle WA 98195-7117, USA
| | - Ni-Ni Mao
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China
| | - Grainne McAlonan
- South London and Maudsley NHS Foundation Trust, London BR3 3BX, UK; State Key Laboratory for Cognitive Sciences, The University of Hong Kong, Hong Kong 999077, China; Department of Forensic and Neurodevelopmental Science, Institute of Psychiatry, King's College London, London WC2R 2LS, UK
| | - Martin J McKeown
- Pacific Parkinson's Research Centre, University of British Columbia, Vancouver BC V6E 2M6, Canada; Department of Medicine (Neurology) University of British Columbia, Vancouver BC V6T 1B7, Canada
| | - Shirley Pang
- Division of Neurology, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong 999077, China
| | - Andrea Quattrone
- Institute of Neurology, University Magna Graecia of Catanzaro, Catanzaro CZ 88100, Italy
| | - Irena Rektorova
- Neuroscience Program, Central European Institute of Technology, CEITEC, Masaryk University, Brno 62500, Czech Republic
| | - Alessia Sarica
- Neuroscience Center, Department of Medical and Surgical Sciences, Magna Graecia University of Catanzaro, Catanzaro CZ 88100, Italy
| | - Hui-Fang Shang
- Department of Neurology, West China Hospital, Sichuan University, Chengdu 610065, China
| | - James M Shine
- Brain and Mind Center, The University of Sydney, Sydney NSW 2006, Australia
| | | | - Tomas Slavicek
- Neuroscience Program, Central European Institute of Technology, CEITEC, Masaryk University, Brno 62500, Czech Republic
| | - Xiao-Peng Song
- Department of Neurology, The Affiliated Brain Hospital With Nanjing Medical University, Nanjing 210029, China
| | - Gioacchino Tedeschi
- Department of Advanced Medical and Surgery Sciences, University of Campania "Luigi Vanvitelli", Caserta 81100, Italy
| | - Alessandro Tessitore
- Department of Advanced Medical and Surgery Sciences, University of Campania "Luigi Vanvitelli", Caserta 81100, Italy
| | - David Vaillancourt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville FL 32611, USA
| | - Jian Wang
- Department of Radiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Jue Wang
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China
| | - Z Jane Wang
- Department of Electrical and Computer Engineering, University of British Columbia, Vancouver BC V6T 1Z4, Canada
| | - Lu-Qing Wei
- Department of Neurology, The Affiliated Brain Hospital With Nanjing Medical University, Nanjing 210029, China
| | - Xia Wu
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China
| | - Xiao-Jun Xu
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Lei Yan
- Department of Neurology, The Affiliated Brain Hospital With Nanjing Medical University, Nanjing 210029, China
| | - Jing Yang
- Department of Neurology, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Wan-Qun Yang
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Nai-Lin Yao
- Department of Psychiatry, Queen Mary Hospital, The University of Hong Kong, Hong Kong 999077, China
| | - De-Long Zhang
- Department of Radiology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, China
| | - Jiu-Quan Zhang
- Department of Radiology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Min-Ming Zhang
- Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Yan-Ling Zhang
- Department of Neurology, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Cai-Hong Zhou
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Chao-Gan Yan
- National Basic Science Data Center, Beijing 100190, China
| | - Xi-Nian Zuo
- National Basic Science Data Center, Beijing 100190, China; State Key Laboratory of Cognitive Neuroscience and Learning & McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China.
| | - Mark Hallett
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda MD 20892, USA
| | - Tao Wu
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing 100053, China; Clinical Center for Parkinson's Disease, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory for Parkinson's Disease, Parkinson Disease Center of Beijing Institute for Brain Disorders, Beijing 100050, China; National Clinical Research Center for Geriatric Disorders, Beijing 100730, China
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders, the Affiliated Hospital, Hangzhou Normal University, Hangzhou 310015, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou 311121, China.
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8
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Barker W, Quinonez C, Greig MT, Behar R, Chirinos C, Rodriguez RA, Rosselli M, Rodriguez MJ, Cid RC, Rundek T, McFarland K, Hanson K, Smith G, DeKosky S, Vaillancourt D, Adjouadi M, Marsiske M, Ertekin-Taner N, Golde T, Loewenstein DA, Duara R. Utility of Plasma Neurofilament Light in the 1Florida Alzheimer's Disease Research Center (ADRC). J Alzheimers Dis 2021; 79:59-70. [PMID: 33216030 PMCID: PMC7902971 DOI: 10.3233/jad-200901] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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] [Indexed: 12/13/2022]
Abstract
Background: Plasma NfL (pNfL) levels are elevated in many neurological disorders. However, the utility of pNfL in a clinical setting has not been established. Objective: In a cohort of diverse older participants, we examined: 1) the association of pNfL to age, sex, Hispanic ethnicity, diagnosis, and structural and amyloid imaging biomarkers; and 2) its association to baseline and longitudinal cognitive and functional performance. Methods: 309 subjects were classified at baseline as cognitively normal (CN) or with cognitive impairment. Most subjects had structural MRI and amyloid PET scans. The most frequent etiological diagnosis was Alzheimer’s disease (AD), but other neurological and neuropsychiatric disorders were also represented. We assessed the relationship of pNfL to cognitive and functional status, primary etiology, imaging biomarkers, and to cognitive and functional decline. Results: pNfL increased with age, degree of hippocampal atrophy, and amyloid load, and was higher in females among CN subjects, but was not associated with Hispanic ethnicity. Compared to CN subjects, pNfL was elevated among those with AD or FTLD, but not those with neuropsychiatric or other disorders. Hippocampal atrophy, amyloid positivity and higher pNfL levels each added unique variance in predicting greater functional impairment on the CDR-SB at baseline. Higher baseline pNfL levels also predicted greater cognitive and functional decline after accounting for hippocampal atrophy and memory scores at baseline. Conclusion: pNfL may have a complementary and supportive role to brain imaging and cognitive testing in a memory disorder evaluation, although its diagnostic sensitivity and specificity as a stand-alone measure is modest. In the absence of expensive neuroimaging tests, pNfL could be used for differentiating neurodegenerative disease from neuropsychiatric disorders.
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Affiliation(s)
- Warren Barker
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Carlos Quinonez
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Maria T Greig
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Raquel Behar
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Cesar Chirinos
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Rosemarie A Rodriguez
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
| | - Monica Rosselli
- Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science, Davie, FL, USA
| | | | - Rosie Curiel Cid
- Department of Psychiatry and Behavioral Sciences and Neurology, Miller School of Medicine, University of Miami, FL, USA
| | - Tatjana Rundek
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | | | - Kevin Hanson
- Florida ADRC, University of Florida, Gainesville, FL, USA
| | - Glenn Smith
- Florida ADRC, University of Florida, Gainesville, FL, USA
| | - Steven DeKosky
- Florida ADRC, University of Florida, Gainesville, FL, USA
| | | | - Malek Adjouadi
- College of Engineering and Computing, Florida International University, Miami, Florida, USA
| | | | - Nilufer Ertekin-Taner
- Mayo Clinic Florida, Department of Neuroscience, Jacksonville, FL, USA.,Mayo Clinic Florida, Department of Neurology, Jacksonville, FL, USA
| | - Todd Golde
- Florida ADRC, University of Florida, Gainesville, FL, USA
| | - David A Loewenstein
- Department of Psychiatry and Behavioral Sciences and Neurology, Miller School of Medicine, University of Miami, FL, USA
| | - Ranjan Duara
- Wien Center for Alzheimer's Disease and Memory Disorder, Mount Sinai Medical Center, Miami Beach, FL, USA
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9
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Choi YJ, Delmas S, Yacoubi B, Vaillancourt D, Okun M, Christou E. Deep Brain Stimulation Reduces Midline Tremor During a Static Postural Balance Task in Essential Tremor Patients. Arch Phys Med Rehabil 2020. [DOI: 10.1016/j.apmr.2020.09.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Duara R, Loewenstein DA, Lizarraga G, Adjouadi M, Barker WW, Greig-Custo MT, Rosselli M, Curiel RE, Hanson K, Marsiske M, Ertekin-Taner N, Vaillancourt D, DeKosky S, de Santi S, Golde TE. P2-427: THE RELATIONSHIP BETWEEN HISPANIC ETHNICITY, AMYLOID LOAD AND APOE4 CARRIER STATUS. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.2834] [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: 11/30/2022]
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11
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Duara R, Loewenstein DA, Lizarraga G, Adjouadi M, Barker WW, Greig-Custo MT, Rosselli M, Penate A, Shea YF, Behar R, Ollarves A, Robayo C, Hanson K, Marsiske M, Burke S, Ertekin-Taner N, Vaillancourt D, De Santi S, Golde T, St D. Effect of age, ethnicity, sex, cognitive status and APOE genotype on amyloid load and the threshold for amyloid positivity. Neuroimage Clin 2019; 22:101800. [PMID: 30991618 PMCID: PMC6447735 DOI: 10.1016/j.nicl.2019.101800] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 02/08/2019] [Accepted: 03/26/2019] [Indexed: 11/30/2022]
Abstract
The threshold for amyloid positivity by visual assessment on PET has been validated by comparison to amyloid load measured histopathologically and biochemically at post mortem. As such, it is now feasible to use qualitative visual assessment of amyloid positivity as an in-vivo gold standard to determine those factors which can modify the quantitative threshold for amyloid positivity. We calculated quantitative amyloid load, measured as Standardized Uptake Value Ratios (SUVRs) using [18-F]florbetaben PET scans, for 159 Hispanic and non-Hispanic participants, who had been classified clinically as Cognitively Normal (CN), Mild Cognitive Impairment (MCI) or Dementia (DEM). PET scans were visually rated as amyloid positive (A+) or negative (A-), and these judgments were used as the gold standard with which to determine (using ROC analyses) the SUVR threshold for amyloid positivity considering factors such as age, ethnicity (Hispanic versus non-Hispanic), gender, cognitive status, and apolipoprotein E ε4 carrier status. Visually rated scans were A+ for 11% of CN, 39.0% of MCI and 70% of DEM participants. The optimal SUVR threshold for A+ among all participants was 1.42 (sensitivity = 94%; specificity = 92.5%), but this quantitative threshold was higher among E4 carriers (SUVR = 1.52) than non-carriers (SUVR = 1.31). While mean SUVRs did not differ between Hispanic and non-Hispanic participants;, a statistically significant interaction term indicated that the effect of E4 carrier status on amyloid load was greater among non-Hispanics than Hispanics. Visual assessment, as the gold standard for A+, facilitates determination of the effects of various factors on quantitative thresholds for amyloid positivity. A continuous relationship was found between amyloid load and global cognitive scores, suggesting that any calculated threshold for the whole group, or a subgroup, is artefactual and that the lowest calculated threshold may be optimal for the purposes of early diagnosis and intervention. Demographic factors did not affect the threshold for amyloid positivity. Cognitive status did not affect this threshold for amyloid positivity. APOE4 carriers had a higher threshold for amyloid positivity than non-carriers. Among APOE4 carriers, non-Hispanics had higher amyloid load than non- Hispanics. There was a continuous relationship between amyloid load and cognitive status.
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Affiliation(s)
- R Duara
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA; College of Engineering and Computing, Florida International University, Miami, FL, USA; University of Florida College of Medicine, Gainesville, FL, USA.
| | - D A Loewenstein
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA; Miller School of Medicine, University of Miami, Miami, FL, USA
| | - G Lizarraga
- Florida ADRC, USA; College of Engineering and Computing, Florida International University, Miami, FL, USA
| | - M Adjouadi
- Florida ADRC, USA; College of Engineering and Computing, Florida International University, Miami, FL, USA
| | - W W Barker
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - M T Greig-Custo
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - M Rosselli
- Florida ADRC, USA; Florida Atlantic University, USA
| | - A Penate
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - Y F Shea
- Mount Sinai Medical Center, Miami Beach, USA; Department of Medicine, University of Hong Kong, Hong Kong
| | - R Behar
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - A Ollarves
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - C Robayo
- Florida ADRC, USA; Mount Sinai Medical Center, Miami Beach, USA
| | - K Hanson
- Florida ADRC, USA; University of Florida College of Medicine, Gainesville, FL, USA
| | - M Marsiske
- Florida ADRC, USA; University of Florida College of Medicine, Gainesville, FL, USA; University of Florida, College of Public Health and Health Professions, USA
| | - S Burke
- Florida ADRC, USA; Robert Stempel College of Public Health & Social Work, Florida International University, Miami, FL, USA
| | - N Ertekin-Taner
- Mayo Clinic Florida, Department of Neurology, Jacksonville, FL, USA; Mayo Clinic Florida, Department of Neuroscience, Jacksonville, FL, USA
| | - D Vaillancourt
- Florida ADRC, USA; University of Florida College of Medicine, Gainesville, FL, USA
| | | | - T Golde
- Florida ADRC, USA; University of Florida College of Medicine, Gainesville, FL, USA
| | - DeKosky St
- Florida ADRC, USA; University of Florida College of Medicine, Gainesville, FL, USA
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12
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Chen-Plotkin AS, Albin R, Alcalay R, Babcock D, Bajaj V, Bowman D, Buko A, Cedarbaum J, Chelsky D, Cookson MR, Dawson TM, Dewey R, Foroud T, Frasier M, German D, Gwinn K, Huang X, Kopil C, Kremer T, Lasch S, Marek K, Marto JA, Merchant K, Mollenhauer B, Naito A, Potashkin J, Reimer A, Rosenthal LS, Saunders-Pullman R, Scherzer CR, Sherer T, Singleton A, Sutherland M, Thiele I, van der Brug M, Van Keuren-Jensen K, Vaillancourt D, Walt D, West A, Zhang J. Finding useful biomarkers for Parkinson's disease. Sci Transl Med 2018; 10:eaam6003. [PMID: 30111645 PMCID: PMC6097233 DOI: 10.1126/scitranslmed.aam6003] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [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] [Received: 12/15/2016] [Accepted: 12/14/2017] [Indexed: 12/11/2022]
Abstract
The recent advent of an "ecosystem" of shared biofluid sample biorepositories and data sets will focus biomarker efforts in Parkinson's disease, boosting the therapeutic development pipeline and enabling translation with real-world impact.
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Affiliation(s)
- Alice S Chen-Plotkin
- Department of Neurology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Roger Albin
- Neurology Service and GRECC, VAAHS, Ann Arbor, MI 48105, USA
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Roy Alcalay
- Department of Neurology, Columbia University Medical Center, New York, NY 10032, USA
| | - Debra Babcock
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20824, USA
| | - Vikram Bajaj
- Verily/Google Life Sciences, South San Francisco, CA 94080, USA
| | - Dubois Bowman
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Alex Buko
- Human Metabolome Technology-America, Boston, MA 02134, USA
| | | | | | - Mark R Cookson
- Cell Biology and Gene Expression Section, Laboratory of Neurogenetics, National Institute of Aging, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ted M Dawson
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Richard Dewey
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tatiana Foroud
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Mark Frasier
- The Michael J. Fox Foundation for Parkinson's Research, New York, NY 10163, USA
| | - Dwight German
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Katrina Gwinn
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20824, USA
| | - Xuemei Huang
- Department of Neurology, Penn State University-Hershey Medical Center, Hershey, PA 17033, USA
| | - Catherine Kopil
- The Michael J. Fox Foundation for Parkinson's Research, New York, NY 10163, USA
| | - Thomas Kremer
- Pharmaceutical Research and Early Development, NORD Discovery and Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., 4070 Basel, Switzerland
| | - Shirley Lasch
- Institute for Neurodegenerative Disorders, New Haven, CT 06510, USA
| | - Ken Marek
- Institute for Neurodegenerative Disorders, New Haven, CT 06510, USA
| | - Jarrod A Marto
- Departments of Cancer Biology and Pathology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Blais Proteomics Center, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | | | - Brit Mollenhauer
- Paracelsus-Elena-Klinik, 34128 Kassel, Germany
- University Medical Center, 37075 Goettingen, Germany
| | - Anna Naito
- The Michael J. Fox Foundation for Parkinson's Research, New York, NY 10163, USA
| | - Judith Potashkin
- Department of Cellular and Molecular Pharmacology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, Chicago, IL 60064, USA
| | - Alyssa Reimer
- The Michael J. Fox Foundation for Parkinson's Research, New York, NY 10163, USA
| | - Liana S Rosenthal
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Rachel Saunders-Pullman
- Department of Neurology, Mount Sinai Beth Israel, Icahn School of Medicine at Mount Sinai, New York, NY 10003, USA
| | - Clemens R Scherzer
- Center for Advanced Parkinson's Disease Research and Precision Neurology Program, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Todd Sherer
- The Michael J. Fox Foundation for Parkinson's Research, New York, NY 10163, USA
| | - Andrew Singleton
- Laboratory of Neurogenetics, National Institute on Aging, Bethesda, MD 20892, USA
| | - Margaret Sutherland
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20824, USA
| | - Ines Thiele
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Luxembourg, Luxembourg
| | | | | | - David Vaillancourt
- Department of Applied Physiology, Biomedical Engineering, and Neurology, University of Florida, Gainesville, FL 32611, USA
| | - David Walt
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Andrew West
- Department of Neurology, University of Alabama, Birmingham, AL 35233, USA
| | - Jing Zhang
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
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13
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Duara R, Loewenstein DA, Lizarraga G, Adjouadi M, Barker WW, Greig-Custo MT, Penate A, Hanson K, Marsiske M, Burke SL, Ertekin-Taner N, Vaillancourt D, DeKosky S, Santi S, Golde TE. P3‐378: EFFECT OF AGE, GENDER, ETHNICITY, COGNITION AND APOE GENOTYPE ON AMYLOID LOAD AMONG NORMAL, MCI AND MILD DEMENTIA SUBJECTS USING [F‐18] FLORBETABEN. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.1740] [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: 10/28/2022]
Affiliation(s)
- Ranjan Duara
- Mount Sinai Medical CenterMiami BeachFLUSA
- Florida International UniversityMiamiFLUSA
- University of FloridaGainesvilleFLUSA
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14
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Vaillancourt D, Grand F, Defontis M. Comparison of three methods of sampling for endometrial cytology in the mare. Tierarztl Prax Ausg G Grosstiere Nutztiere 2018. [DOI: 10.1055/s-0038-1624633] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Summary
Objective: This prospective study aims to compare three different sampling techniques for the collection of endometrial cytological specimens in the mare: the guarded culture swab, the uterine cytobrush and the low volume uterine flush. Material and methods: The study po - pulation consisted of six healthy Standardbred mares in dioestrus. In each mare an acute endometritis was induced by performing a lowvolume uterine flush 6 days after ovulation using a sterile isotonic solution (lactated Ringer's solution or ViGro™ Complete Flush Solution). Two days after initiating inflammation, samples were collected from each mare using the three compared techniques: the double guarded cotton swab, the uterine cytobrush and the low volume uterine flush. The cytological evaluation of the samples was based on following criteria: the quality and cellularity of the samples and the number of neu - trophils recovered. Results: The uterine cytobrush yielded slides of significantly (p = 0.02) better quality than the low volume uterine flush. There was no significant difference between the cytobrush and the double guarded swab technique for the quality. There was no difference between techniques in the number of endometrial cells (p = 0.55) and neutrophils recovered (p = 0.28). Conclusion and clinical relevance: Endometrial cytology is a practical method for the diagnosis of acute endometrial inflammation in the mare. Since no difference in the number of neutrophils was found between the three techniques, the choice of the sampling method should be based on other factors such as practicability, costs and disadvantages of each technique.
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15
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Wagle Shukla A, Okun M, Vaillancourt D, Warren L. The ice test to differentiate essential tremor from Parkinson's disease tremor. Clin Neurophysiol 2017; 128:2181-2183. [PMID: 28946133 DOI: 10.1016/j.clinph.2017.08.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 08/23/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Aparna Wagle Shukla
- Center for Movement Disorders and Neurorestoration, Department of Neurology, University of Florida, Gainesville, FL, USA.
| | - Michael Okun
- Center for Movement Disorders and Neurorestoration, Department of Neurology, University of Florida, Gainesville, FL, USA.
| | - David Vaillancourt
- Dept of Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
| | - Lisa Warren
- Center for Movement Disorders and Neurorestoration, Department of Neurology, University of Florida, Gainesville, FL, USA.
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16
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Almeida L, Ahmed B, Walz R, De Jesus S, Patterson A, Martinez-Ramirez D, Vaillancourt D, Bowers D, Ward H, Okun MS, McFarland NR. Depressive Symptoms are Frequent in Atypical Parkinsonian Disorders. Mov Disord Clin Pract 2016; 4:191-197. [PMID: 28944256 DOI: 10.1002/mdc3.12382] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVE To compare the incidence and prevalence of depressive symptoms in atypical parkinsonian (APD) syndromes versus Parkinson disease (PD). METHODS In a large retrospective patient cohort we analyzed the incidence and prevalence of depressive symptoms using the Beck Depression Inventory (BDI) and evaluated subjects longitudinally on subsequent visits. For individuals who followed in subsequent visits we calculated incidence rates in person-years as a measure of incidence. RESULTS We identified 361 patients with APD including Progressive Supranuclear Palsy (PSP), Corticobasal Degeneration (CBD), Multiple System Atrophy (MSA) and Dementia with Lewy Bodies (DLB), and 2352 PD controls. The mean BDI values were significantly higher in APD (F=14.19, p < 0.001). A significantly higher proportion of APD subjects screened positive for depressive symptoms both at initial and subsequent patient visits (p < 0.001), which appeared to be more severe in the APD subgroups. UPDRS part III and disease duration weakly correlated with depressive symptoms. CONCLUSIONS Our results suggest that the incidence and prevalence of depressive symptoms are higher in APD and appear also to be more severe than in PD. Depressive symptoms in APD are common and affect patients regardless of disease duration or motor severity.
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Affiliation(s)
- Leonardo Almeida
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Bilal Ahmed
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Roger Walz
- Department of Neurology, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Sol De Jesus
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Addie Patterson
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Daniel Martinez-Ramirez
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - David Vaillancourt
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States.,Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States
| | - Dawn Bowers
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States.,Department of Clinical & Health Psychology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Herbert Ward
- Department of Psychiatry, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Michael S Okun
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
| | - Nikolaus R McFarland
- Department of Neurology, University of Florida, Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States
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Rosenthal LS, Drake D, Alcalay RN, Babcock D, Bowman FD, Chen-Plotkin A, Dawson TM, Dewey RB, German D, Huang X, Landin B, McAuliffe M, Petyuk VA, Scherzer CR, St Hillaire-Clarke C, Sieber BA, Sutherland M, Tarn C, West A, Vaillancourt D, Zhang J, Gwinn K. The NINDS Parkinson's disease biomarkers program. Mov Disord 2016; 31:915-23. [PMID: 26442452 PMCID: PMC4824671 DOI: 10.1002/mds.26438] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [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: 01/10/2015] [Revised: 08/11/2015] [Accepted: 08/16/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Neuroprotection for Parkinson's disease (PD) remains elusive. Biomarkers hold the promise of removing roadblocks to therapy development. The National Institute of Neurological Disorders and Stroke has therefore established the Parkinson's Disease Biomarkers Program to promote discovery of PD biomarkers for use in phase II and III clinical trials. METHODS Using a novel consortium design, the Parkinson's Disease Biomarker Program is focused on the development of clinical and laboratory-based biomarkers for PD diagnosis, progression, and prognosis. Standardized operating procedures and pooled reference samples were created to allow cross-project comparisons and assessment of batch effects. A web-based Data Management Resource facilitates rapid sharing of data and biosamples across the research community for additional biomarker projects. RESULTS Eleven consortium projects are ongoing, seven of which recruit participants and obtain biosamples. As of October 2014, 1,082 participants have enrolled (620 PD, 101 with other causes of parkinsonism, 23 essential tremor, and 338 controls), 1,040 of whom have at least one biosample. Six thousand eight hundred ninety-eight total biosamples are available from baseline, 6-, 12-, and 18-month visits: 1,006 DNA, 1,661 RNA, 1,419 whole blood, 1,382 plasma, 1,200 serum, and 230 cerebrospinal fluid (CSF). Quality control analysis of plasma, serum, and CSF samples indicates that almost all samples are high quality (24 of 2,812 samples exceed acceptable hemoglobin levels). CONCLUSIONS By making samples and data widely available, using stringent operating procedures based on existing standards, hypothesis testing for biomarker discovery, and providing a resource that complements existing programs, the Parkinson's Disease Biomarker Program will accelerate the pace of PD biomarker research. © 2015 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Liana S. Rosenthal
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore MD
| | - Daniel Drake
- Department of Biostatistics, Columbia University, New York, New York
| | - Roy N. Alcalay
- Department of Neurology, Columbia University, New York, New York
| | - Debra Babcock
- National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD
| | - F. DuBois Bowman
- Department of Biostatistics, Columbia University, New York, New York
| | | | - Ted M. Dawson
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore MD
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Solomon H. Snyder Department of Neuroscience, Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard B. Dewey
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas TX
| | - Dwight German
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas TX
| | - Xuemei Huang
- Department of Neurology, Penn State Hershey Medical Center, Hershey, PA
| | - Barry Landin
- Center for Information Technology, National Institutes of Health, Bethesda, MD
| | - Matthew McAuliffe
- Center for Information Technology, National Institutes of Health, Bethesda, MD
| | - Vladislav A. Petyuk
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA
| | - Clemens R. Scherzer
- Department of Neurology, Brigham & Women’s Hospital, Harvard Medical School, Cambridge, MA
| | | | - Beth-Anne Sieber
- National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD
| | - Margaret Sutherland
- National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD
| | - Chi Tarn
- Coriell Institute for Medical Research, Camden, NJ
| | - Andrew West
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL
| | - David Vaillancourt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL
| | - Jing Zhang
- Department of Pathology, University of Washington, Seattle, WA
| | - Katrina Gwinn
- National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD
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18
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Amano S, Skinner JW, Lee HK, Stegemöller EL, Hack N, Akbar U, Vaillancourt D, McFarland NR, Hass CJ. Discriminating features of gait performance in progressive supranuclear palsy. Parkinsonism Relat Disord 2015; 21:888-93. [PMID: 26032992 DOI: 10.1016/j.parkreldis.2015.05.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 05/14/2015] [Accepted: 05/22/2015] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Progressive supranuclear palsy (PSP) is the most common form of atypical Parkinsonism; however it is underdiagnosed and often misdiagnosed as Parkinson's disease (PD). METHODS We investigated gait initiation (GI) and gait performance in a total of 36 participants (12 PSP, 12 PD and 12 healthy age- and gender-matched controls) to gain further insight into specific motor deficits that characterize dynamic postural control and gait in PSP. Anticipatory postural adjustments (APAs), quantified by center of pressure (COP) displacement and speed prior to an initial heel off, and the maximum distance (COPCOM) between COP and center of mass (COM) during all three GI phases were calculated to evaluate dynamic postural control. Steady-state gait performance was also evaluated and compared across the groups. RESULTS APAs in PSP were significantly altered such that the posterior COP shift is profoundly diminished when compared to PD (p < 0.05). Moreover, proper velocity control during GI in PSP was affected, particularly in the mediolateral direction, when compared to PD (p < 0.05). The diminished COPCOM distance is further indicative of more severe dynamic postural instability in PSP than in PD (p < 0.05). Significant differences in spatiotemporal parameters, inter-step variability, and asymmetry during gait in PSP, in comparison with PD were also identified (all p's < 0.05). CONCLUSION The present study reveals that the compensatory GI strategy in PSP is distinct from PD and paradoxically induces lateral instability. Further, gait performance in PSP is slower and more variable which could be the consequence of lateral instability and fear of falling.
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Affiliation(s)
- Shinichi Amano
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA; Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens, OH, USA
| | - Jared W Skinner
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA
| | - Hyo Keun Lee
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA
| | - Elizabeth L Stegemöller
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA; Department of Kinesiology, Iowa State University, Ames, IA, USA
| | - Nawaz Hack
- Center for Movement Disorders and Neurorestoration, Gainesville, FL, USA; Department of Neurology, University of Florida, Gainesville, FL, USA
| | - Umer Akbar
- Center for Movement Disorders and Neurorestoration, Gainesville, FL, USA; Department of Neurology, University of Florida, Gainesville, FL, USA
| | - David Vaillancourt
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA
| | - Nikolaus R McFarland
- Center for Movement Disorders and Neurorestoration, Gainesville, FL, USA; Department of Neurology, University of Florida, Gainesville, FL, USA
| | - Chris J Hass
- Department of Applied Physiology & Kinesiology, University of Florida, Gainesville, FL, USA; Center for Movement Disorders and Neurorestoration, Gainesville, FL, USA.
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Salehian H, Vaillancourt D, Vemuri BC. iPGA: incremental principal geodesic analysis with applications to movement disorder classification. Med Image Comput Comput Assist Interv 2014; 17:765-72. [PMID: 25485449 PMCID: PMC4260816 DOI: 10.1007/978-3-319-10470-6_95] [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] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
The nonlinear version of the well known PCA called the Prinicipal Geodesic Analysis (PGA) was introduced in the past decade for statistical analysis of shapes as well as diffusion tensors. PGA of diffusion tensor fields or any other manifold-valued fields can be a computationally demanding task due to the dimensionality of the problem and thus establishing motivation for an incremental PGA (iPGA) algorithm. In this paper, we present a novel iPGA algorithm that incrementally updates the current Karcher mean and the principal sub-manifolds with any newly introduced data into the pool without having to recompute the PGA from scratch. We demonstrate substantial computational and memory savings of iPGA over the batch mode PGA for diffusion tensor fields via synthetic and real data examples. Further, we use the iPGA derived representation in an NN classifier to automatically discriminate between controls, Parkinson's Disease and Essential Tremor patients, given their HARDI brain scans.
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Affiliation(s)
| | - David Vaillancourt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Baba C. Vemuri
- Department of CISE, University of Florida, Gainesville, Florida, USA
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20
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Peng-Chen Z, Morishita T, Vaillancourt D, Favilla C, Foote KD, Okun MS, Wagle Shukla A. Unilateral thalamic deep brain stimulation in essential tremor demonstrates long-term ipsilateral effects. Parkinsonism Relat Disord 2013; 19:1113-7. [PMID: 24021661 DOI: 10.1016/j.parkreldis.2013.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 05/25/2013] [Accepted: 08/04/2013] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Deep Brain Stimulation (DBS) of thalamus in essential tremor (ET) is effective for the treatment of contralateral tremors. Bilateral DBS controls tremors on both sides but is associated with increased morbidity and risks. We evaluated if unilateral surgery had ipsilateral benefits on tremors and thus could be a potentially safer alternative to bilateral DBS. METHODS Medication refractory ET patients undergoing unilateral thalamic DBS were included and longitudinally followed. Tremor rating scale was used to record total motor, arm tremor and activities of daily living (ADL) scores at baseline, six months and at last visit (three or more years after surgery). Postoperative scores were recorded with DBS turned OFF and ON. RESULTS Twenty-two patients with a mean follow-up 3.4 ± 0.14 years were enrolled. When baseline scores were compared to scores with the DBS turned ON, significant improvements were noted in total tremor (40%), ADL (67%) and arm tremor scores both on the ipsilateral and the contralateral side at six months and at the last visit of follow-up (all p < 0.05). Ipsilateral arm tremor (∼56%) improvements were milder compared to the contralateral side (∼73%) tremors. CONCLUSION Unilateral thalamic DBS in ET demonstrates significant long-term benefits for ipsilateral arm tremors and can be offered to higher risk and to select patients.
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Affiliation(s)
- Zhongxing Peng-Chen
- Department of Neurology, University of Florida, Movement Disorders Center, Gainesville, FL, USA; University for Development, Av. Plaza 680, San Carlos de Apoquindo, Las Condes, Santiago, Chile
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21
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Corcos D, Robichaud J, David F, Vaillancourt D, Poon C, Rafferty M, Comella C, Kohrt W, Leurgans S. 24 Months of Exercise Improves the Motor Symptoms in Parkinson's Disease (S02.003). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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22
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Corcos D, Robichaud J, David F, Vaillancourt D, Poon C, Rafferty M, Comella C, Kohrt W, Leurgans S. 24 Months of Exercise Improves the Motor Symptoms in Parkinson's Disease (IN6-2.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in6-2.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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23
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Prodoehl J, Spraker M, Corcos D, Comella C, Vaillancourt D. Blood oxygenation level-dependent activation in basal ganglia nuclei relates to specific symptoms in de novo Parkinson's disease. Mov Disord 2011; 25:2035-43. [PMID: 20725915 DOI: 10.1002/mds.23360] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
To aid the development of symptomatic and disease modifying therapies in Parkinson's disease (PD), there is a strong need to identify noninvasive measures of basal ganglia (BG) function that are sensitive to disease severity. This study examines the relation between blood oxygenation level-dependent (BOLD) activation in every nucleus of the BG and symptom-specific disease severity in early stage de novo PD. BOLD activation measured at 3 T was compared between 20 early stage de novo PD patients and 20 controls during an established precision grip force task. In addition to the BG nuclei, activation in specific thalamic and cortical regions was examined. There were three novel findings. First, there were significant negative correlations between total motor Unified PD Rating Scale and BOLD activation in bilateral caudate, bilateral putamen, contralateral external segment of the globus pallidus, bilateral subthalamic nucleus, contralateral substantia nigra, and thalamus. Second, bradykinesia was the symptom that most consistently predicted BOLD activation in the BG and thalamus. Also, BOLD activation in the contralateral internal globus pallidus was related to tremor. Third, the reduced cortical activity in primary motor cortex and supplementary motor area in de novo PD did not relate to motor symptoms. These findings demonstrate that BOLD activity in nuclei of the BG relates most consistently to bradykinesia and functional magnetic resonance imaging has strong potential to serve as a noninvasive marker for the state of BG function in de novo PD.
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Affiliation(s)
- Janey Prodoehl
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA
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24
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Defontis M, Vaillancourt D, Grand FX. Comparison of three methods of sampling for endometrial cytology in the mare. Preliminary study. Tierarztl Prax Ausg G Grosstiere Nutztiere 2011; 39:171-175. [PMID: 22138802] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Accepted: 12/13/2010] [Indexed: 05/31/2023]
Abstract
OBJECTIVE This prospective study aims to compare three different sampling techniques for the collection of endometrial cytological specimens in the mare: the guarded culture swab, the uterine cytobrush and the low volume uterine flush. MATERIAL AND METHODS The study population consisted of six healthy Standardbred mares in dioestrus. In each mare an acute endometritis was induced by performing a low- volume uterine flush 6days after ovulation using a sterile isotonic solution (lactated Ringer's solution or ViGro™ Complete Flush Solution). Two days after initiating inflammation, samples were collected from each mare using the three compared techniques: the double guarded cotton swab, the uterine cytobrush and the low volume uterine flush. The cytological evaluation of the samples was based on following criteria: the quality and cellularity of the samples and the number of neutrophils recovered. RESULTS The uterine cytobrush yielded slides of significantly (p=0.02) better quality than the low volume uterine flush. There was no significant difference between the cytobrush and the double guarded swab technique for the quality. There was no difference between techniques in the number of endometrial cells (p=0.55) and neutrophils recovered (p=0.28). CONCLUSION AND CLINICAL RELEVANCE Endometrial cytology is a practical method for the diagnosis of acute endometrial inflammation in the mare. Since no difference in the number of neutrophils was found between the three techniques, the choice of the sampling method should be based on other factors such as practicability, costs and disadvantages of each technique.
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Affiliation(s)
- M Defontis
- Equine Clinic of the Faculté de Médecine Vétérinaire, Montreal University, Canada.
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25
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Doizé F, Vaillancourt D, Carabin H, Bélanger D. Determination of gestational age in sheep and goats using transrectal ultrasonographic measurement of placentomes. Theriogenology 1997; 48:449-60. [PMID: 16728141 DOI: 10.1016/s0093-691x(97)00254-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/1995] [Accepted: 07/14/1996] [Indexed: 10/17/2022]
Abstract
Three experiments were conducted to determine gestational age in the ewe and doe by measuring placentomes with a B-mode ultrasonograph and a 5 MHz transducer. Transrectal measurements were obtained by placing the female over a bale of hay. In Experiment 1, ewes (n = 12) and does (n = 15) were examined by transrectal ultrasonography every week from breeding to parturition to determine the growth pattern of placentomes during pregnancy. In Experiment 2, placentomes from 132 ewes and 169 does were measured between 30 and 90 d of gestation. A linear regression relationship between fetal age in days and placentome size in mm was calculated and adjusted for does (gestational age = 28.74 + 1.80PL + e, r(2) = 70.34) and for ewes (age = 47.98 + 0.62PL + e, r(2) = 15.59). In Experiment 3, the placentomes of 63 does were measured to validate this relationship by using linear regression. Gestational age was determined correctly in 66% of the does, with a range of +/- 7 d and in 96% with a margin of +/- 14 d. In conclusion, transrectal ultrasonography allowed for the measurement of placentome size, which increased rapidly during the first 70 to 90 d of gestation in ewes and does. In ewes, however, there was a poor correlation of placentome size with gestational age, while in goats, measurement of placentomes could be used along with pregnancy diagnosis by transrectal ultrasonography as an indication of gestation age.
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Affiliation(s)
- F Doizé
- Department of Clinical Sciences Faculty of Veterinary Medicine, University of Montréal Saint-Hyacinthe Québec J2S 7C6, Canada
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26
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Csik-Salmon J, Blais D, Vaillancourt D, Garon O, Bisaillon A. [Use of a mix of lidocaine and butorphanol as a caudal epidural anesthesia in a mare]. Can J Vet Res 1996; 60:288-95. [PMID: 9026402 PMCID: PMC1263851] [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] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Loss of rear motor control is the main limiting factor in the use of caudal epidural anesthesia in the horse. In man and laboratory animals, a small dose of an opiate combined with a local anesthetic enhances analgesia without impairing motor function. Thus, the amount of local anesthetic administered may be reduced. Butorphanol is an opiate widely used in horses. It has a good margin of safety and few cardiorespiratory effects. The effects of lidocaine (0.25 mg/kg) and lidocaine-butorphanol (0.25 mg/kg, and 0.04 mg/kg, respectively) were compared in 2 groups of 5 healthy unsedated mares. Horses in each group received either lidocaine or lidocaine-butorphanol in saline solution for a total volume of 0.0165 mg/kg. Epidural injection was performed at the first coccygeal interspace. Each mare was used only once. Cutaneous analgesia was assessed by a response to a pin prick; and visceral analgesia was assessed by response to a noxious stimulus applied to the urethra. Heart rate, respiratory rate, and arterial blood pressure were also measured. Analysis of the results showed an increase in duration of both cutaneous and visceral analgesia in the mares given lidocaine-butorphanol. Cutaneous analgesia increased from 36 +/- 13 to 150 +/- 21 min and visceral analgesia increased from 22 +/- 10 to 162 +/- 16 min. A cranial extension of the cutaneous analgesia was also observed. Cardiorespiratory depression or signs of excitation were not observed. However, these mares demonstrated peculiar walking in the hind limbs, not associated with signs of ataxia or hyperkinesia.
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Affiliation(s)
- J Csik-Salmon
- Département de biomédecine Vétérinaire, Faculté de médecine Vétérinaire, Université de Montreal, Saint-Hyacinthe, Québec
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27
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Carabin H, Martineau GP, Vaillancourt D, Higgins R, Bigras-Poulin M. Detection of cervical bacterial contamination in swine by two methods of swabbing in relation to artificial insemination. Can J Vet Res 1996; 60:40-4. [PMID: 8825992 PMCID: PMC1263798] [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] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Factors associated with uterine contamination during artificial insemination (AI) are not well defined. A frequently imputed risk factor is vulvar hygiene, although its role has never been assessed objectively. The aim of this study was to identify an objective marker of hygiene during AI and to assess the impact of vulvar hygiene on cervical contamination. In a herd in a depopulation-repopulation process, 68 paired sows of each parity were divided into 2 treatment groups. Before 2 sham AIs, with a 24 hour interval, control sows (CTR) had their vulva cleaned and treatment sows (TRT) had theirs soiled with feces. After the 2nd sham AI, swabbings were taken from the spirette and from the cervix. Bacterial growth was assessed by a semiquantitative method, and aerobic bacterial species identified. The discordance between the paired data was assessed by a McNemar chi-square test. No difference in gram-positive bacterial counts between the 2 groups was found using the cervical swab (P > 0.05). The presence of trace colonies of Escherichia coli were, however, more frequent in TRT (P < 0.05). The spirette showed a greater contamination for mixed flora of bacterial species such as E. coli (P < 0.001) and non-S. suis streptococci (P < 0.05) in TRT sows. A light cervical E. coli growth was more frequent when the vulva had been soiled. Bacterial flora on the spirette following AI may be used as an objective and practical indicator of vulvar hygiene during AI in sows.
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Affiliation(s)
- H Carabin
- Faculté de médecine vétérinaire, Université de Montréal, St-Hyacinthe, Québec
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28
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Carabin H, Desnoyers M, Vaillancourt D, Martineau GP. Influence of vulvar hygiene on cytology of vaginal smears after sham artificial insemination in sows. Can J Vet Res 1995; 59:193-6. [PMID: 8521352 PMCID: PMC1263765] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The description of vaginal cytology in the sow in relation to artificial insemination (AI) has never been reported. Poor vulvar hygiene is frequently imputed as a cause for the development of endometritis after AI and could thus enhance the inflammatory response of the genital tract. The goal of this study was to use cytology as an objective tool to evaluate the vulvar hygiene during sham AI. Sixty-eight sows were matched according to their parity and week of mating and divided into 2 groups: treatment sows (CVS) had their vulva cleaned with a 1:2000 Hibitane solution and control sows (SVS) had theirs soiled with feces. Both groups of sows were inseminated twice with saline following this vulvar treatment, once at detection of estrus and a 2nd time 24 hours later. Vestibular smears were taken before each AI, and vaginal smears were taken after each AI from the material present on the insemination spirette. Cytological smears were described by the predominant type of cells, namely epithelial, neutrophil, or no predominance. Results showed no significant differences between the 2 groups and no evolution in the predominance of neutrophils from the 1st to the 2nd AI (P > 0.05). The pooled results from the 2 groups showed an increase in cellularity from the 1st to the 2nd AI (P > 0.05). Neither the cellularity nor predominant cell type in vestibular or vaginal smears from estrus sows are predictors of vulvar hygiene during sham AI (P > 0.05).
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Affiliation(s)
- H Carabin
- Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec
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Giguère S, Vaillancourt D. Evaluation of two qualitative enzyme immunoassays for the rapid assessment of progesterone in equine plasma. Can Vet J 1994; 35:643-5. [PMID: 7994708 PMCID: PMC1686769] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- S Giguère
- Département de médecine, Faculté de Médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec
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Poitras P, Guay P, Vaillancourt D, Zidane N, Bigras-Poulin M. In vitro viability of cryopreserved equine embryos following different freezing protocols. Can J Vet Res 1994; 58:235-41. [PMID: 7889453 PMCID: PMC1263705] [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] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The main objective of this study was to evaluate two freezing protocols and the effect of agar embedding on survival of day 6.5 equine embryos. A total of 133 embryos were used, in one group (n = 51), embryos were first embedded in agar before the freezing protocol was started. A freezing protocol to -30 degrees C or -33 degrees C was used before plunging embryos into liquid nitrogen (LN2). The embryos were thawed in water at 37 degrees C, evaluated and placed in culture. After 24 h culture, the embryos were evaluated for their morphology and development. No differences were observed between embryos plunged at -30 degrees or at -33 degrees C in LN2. The analysis of the morphology and development after thawing showed that the diameter and developmental stage at freezing correlated with embryo survival. Morula and early blastocyst stages of development were associated with better quality after freezing and thawing and had a better potential to survive after in vitro culture (p < 0.05) compared to more advanced stages. The agar failed to protect embryos from zona pellucida damage, but a tendency to prevent rupture was observed in larger embedded embryos.
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Slama H, Vaillancourt D, Goff AK. Control of in vitro prostaglandin F2 alpha and E2 synthesis by caruncular and allantochorionic tissues from cows that calved normally and those with retained fetal membranes. Domest Anim Endocrinol 1994; 11:175-85. [PMID: 8045099 DOI: 10.1016/0739-7240(94)90025-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
High concentrations of PGF2 alpha and PGE2 are produced by the uterus during the early postpartum period in cows and may play an important role in both placental separation and uterine involution. In the present study, we have examined the hormonal and intracellular control mechanisms involved in PGF2 alpha and PGE2 secretion by caruncular and allantochorionic tissue in vitro. Tissue explants, obtained about 6 hr postpartum from cows that delivered normally (NFM, n = 10) or cows with retained fetal membranes (RFM, n = 4), were incubated for 6 hr and PGF2 alpha and PGE2 concentrations in the medium were determined by radioimmunoassay. Addition of oxytocin (100 microU/ml), platelet activating factor (PAF, 100 ng/ml) and epidermal growth factor (EGF, 100 ng/ml) had no effect on secretion of PGF2 alpha from the caruncle, but oxytocin and PAF did stimulate PGE2. There was no difference between groups of cows. All three substances stimulated PGF2 alpha from the allantochorion of NFM, but not RFM, cows and stimulated PGE2 secretion from the allantochorion of both groups of cows. Incubation of the tissues with cholera toxin (100 ng/ml), dibutyryl cyclic adenosine 3',5'-monophosphate (dibutyryl cAMP, 1 mM), calcium ionophore A23187 (5 microM) or phorbol ester 12-myristate-13 acetate (PMA, 100 nM) showed that PGF2 alpha secretion is essentially via the calcium-protein kinase C effector pathway. However, calcium-protein kinase C and cAMP second messenger systems appear to be involved in the secretion of PGE2. Prostaglandin secretion was sensitive to cycloheximide in both caruncular and allantochorionic tissues, suggesting that protein synthesis may be involved. In conclusion, these data show that in vitro PGF2 alpha secretion can be modulated by the agonists used only in allantochorion and is essentially via the calcium-protein kinase C effector pathway. PGE2 secretion can be modified in both caruncular and allantochorion tissues and involves both inositol triphosphate-diacylglycerol and cAMP second messenger systems.
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Affiliation(s)
- H Slama
- Département de Médecine, Faculté de Médecine Vétérinaire, Université de Montréal
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32
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Drolet R, Fairbrother JM, Vaillancourt D. Attaching and effacing Escherichia coli in a goat with diarrhea. Can Vet J 1994; 35:122-3. [PMID: 8069824 PMCID: PMC1686733] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- R Drolet
- Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec
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33
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Slama H, Vaillancourt D, Goff AK. Effect of bacterial cell wall and lipopolysaccharide on arachidonic acid metabolism by caruncular and allantochorionic tissues from cows that calved normally and those that retained fetal membranes. Theriogenology 1994; 41:923-42. [PMID: 16727446 DOI: 10.1016/0093-691x(94)90508-g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/1993] [Accepted: 11/15/1993] [Indexed: 10/26/2022]
Abstract
Immunoactive eicosanoids may have a role in both placental separation and uterine involution in cattle. In the present study, we examined the effects of bacterial cell wall preparation and endotoxins on in vitro prostaglandin synthesis and arachidonic acid (AA) metabolism by caruncular and allantochorionic tissues. Placentomes were obtained about 6 h post partum from cows that delivered normally (n = 10) or those with retained fetal membranes (n = 4); the tissue explants were incubated for 6 h in the presence of labeled or nonlabeled AA. Prostaglandin F(2alpha) (PGF(2alpha)) and E(2) (PGE(2)) were measured by radioimmunoassay, and labeled AA metabolites were separated by reverse phase-high pressure-liquid chromatography. There was no effect of bacterial cell wall preparations or endotoxins on in vitro caruncular PGF(2alpha) secretion. However, bacterial products increased caruncular PGE(2) secretion in both cows that delivered normally and those with retained fetal membranes. For normal delivery cows caruncular tissue, bacterial product also increased leukotriene B(4) (LTB(4)) and decreased both thromboxane B(2) (TXB(2)) and hydroxy-eicosatetranoic acids (HETE) in vitro secretion. For the allantochorion, bacterial products increased in vitro PGF(2alpha) secretion only in cows that delivered normally and increased PGE(2) secretion essentially in cows with retained fetal membranes. In general, 6 keto PGF(1alpha) was the main metabolite secreted by both allantochorionic and carucular tissues. However, in cows with retained fetal membranes, PGE(2) became the most important metabolite secreted by allantochorion, especially in the presence of endotoxin. In conclusion, these results suggest that bacteria found in the early postpartum uterus or their endotoxin affect primarily caruncular and allantochorionic PGE(2) synthesis.
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Affiliation(s)
- H Slama
- Centre de Recherche en Reproduction Animale, Faculty of Veterinary Medicine, St-Hyacinthe, Quebec, Canada
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34
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Vaillancourt D, Guay P, Higgins R. The effectiveness of gentamicin or polymyxin B for the control of bacterial growth in equine semen stored at 20 degrees C or 5 degrees C for up to forty-eight hours. Can J Vet Res 1993; 57:277-80. [PMID: 8269366 PMCID: PMC1263640] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Semen from three stallions was used to evaluate the effectiveness of two antibiotics added to semen extender for samples stored at 20 degrees C or 5 degrees C for up to 48 hours. Each ejaculate was divided into six different treatments: semen+extender (SE); SE+gentamicin (100 micrograms/mL); SE+polymyxin B (1000 units/mL); and each of the above treatments inoculated with Pseudomonas aeruginosa ATCC 27853. Sampling of diluted semen for bacteriological analysis was performed after 2, 8, 24 and 48 hours of preservation at either temperatures. The presence of nonspecific bacteria was noted after two hours in all SE aliquots. The number of bacteria did not change in samples stored at 5 degrees C, while in samples preserved at 20 degrees C, it increased by three to four times after 48 hours. In semen aliquots treated with either of the antibiotics, the number of nonspecific bacteria was very low after two and eight hours at both temperatures. This number remained stable up to 48 hours at 5 degrees C, while an increase was noted at 24 and 48 hours at 20 degrees C. At 5 degrees C, the number of P. aeruginosa cells tended to decrease between 24 and 48 hours in SE aliquots. The presence of gentamicin or polymyxin B appeared to rapidly inhibit growth of P. aeruginosa. At 20 degrees C, growth of P. aeruginosa increased between 8 and 24 hours in SE, while the presence of antibiotics almost completely inhibited the growth of the bacterium.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- D Vaillancourt
- Département de Médecine, Faculté de Médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec
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35
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Slama H, Vaillancourt D, Goff AK. Leukotriene B4 in cows with normal calving, and in cows with retained fetal membranes and/or uterine subinvolution. Can J Vet Res 1993; 57:293-9. [PMID: 8269369 PMCID: PMC1263643] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Two experiments were performed to study the relationship between leukotriene B4 (LTB4) synthesis and placental separation and uterine involution in the cow. In experiment I, the concentration and synthesis of LTB4 by caruncular tissue was lower in cows with retained fetal membranes (RFM cows, n = 11) than in cows that expelled the fetal membranes normally (NFM cows, n = 19). The presence of bacterial cell wall, especially of alpha-hemolytic streptococci and coagulase positive staphylococci enhanced LTB4 synthesis by allantochorion only in NFM cows. In the RFM group, Escherichia coli lipopolysaccharide decreased allantochorionic LTB4 synthesis. With caruncle, only epidermal growth factor increased LTB4 production in NFM cows. In experiment II, the caruncular and endometrial secretion of LTB4 was lower in cows with subuterine involution (SUI cows, n = 5) or cows with SUI and RFM (SUI+RFM cows, n = 4) than in cows with normal uterine involution (NUI cows, n = 8). This decrease was especially noticeable in the previously gravid horn. In the three uterine involution groups, there were no differences in LTB4 synthesis by caruncular tissue taken from the previously gravid horn. However, progesterone and a bacterial suspension of E. coli reduced the synthesis of LTB4. Estradiol had no effect on LTB4 synthesis at the end of the postpartum period. These results suggest that LTB4 may play an important role in both placental separation and uterine involution in cattle and LTB4 synthesis may be modulated by endocrine and bacterial factors.
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Affiliation(s)
- H Slama
- Département de médecine, Université de Montréal, Faculté de Médecine vétérinaire, Sainte-Hyacinthe, Québec
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Abstract
The objective of this study was to determine if changes in steroid synthesis occurred in the horse blastocyst about the time of maternal recognition of pregnancy. Embryos collected between days 7.5 and 14.5 were incubated for 8 hr in vitro in HAM's F10 containing radiolabelled pregnenolone. The steroid metabolites in the incubation medium were separated by reverse phase HPLC and the major peaks expressed as a percentage of total metabolites. It was found that there were no major changes in the profile of metabolites throughout the period of study, although there was increased conversion as the conceptuses developed. It was found that the major metabolite produced was 17 alpha-hydroxyprogesterone and not estradiol as expected. A second experiment was conducted to determine if 17 alpha-hydroxyprogesterone was metabolized by endometrial tissue. Endometrial biopsies from anestrous mares and from pregnant and nonpregnant mares at day 11 were incubated with radiolabelled 17 alpha-hydroxyprogesterone, progesterone or pregnenolone. The 17 alpha-hydroxyprogesterone, but not progesterone nor pregnenolone, was converted to a more polar metabolite in all groups. Production of this metabolite was significant greater in the anestrous mares. This metabolite has not been unidentified conclusively. Thus, results of this study show that 17 alpha-hydroxyprogesterone is the major steroid synthesized by the equine blastocyst and that this steroid is further metabolized to an unidentified steroid by the endometrium. These steroids could play a role in conceptus development or maternal recognition of pregnancy.
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Affiliation(s)
- A K Goff
- Centre de recherche en reproduction animale, Faculté de médecine vétérinaire, Université de Montréal, St-Hyacinthe, Québec
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Slama H, Vaillancourt D, Goff AK. Metabolism of arachidonic acid by caruncular and allantochorionic tissues in cows with retained fetal membranes (RFM). Prostaglandins 1993; 45:57-75. [PMID: 8380936 DOI: 10.1016/0090-6980(93)90090-t] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The metabolism of arachidonic acid (AA) by caruncular and allantochorionic tissues and its regulation was studied in normal cows (n = 13) and those with retained fetal membranes (RFM; n = 9). Tissues were taken via the vagina about 6 hours postpartum and incubated for 6 hours in minimum essential medium containing tritiated AA alone or in the presence of oxytocin, platelet activating factor (PAF), epidermal growth factor (EGF) or ionophore calcium (A23187). The metabolites of AA were separated by reverse phase-high pressure-liquid chromatography. Tissue concentrations of prostaglandin F2 alpha (PGF2 alpha) and prostaglandin E2 (PGE2) and plasma 13,14-dihydro-15-keto-PGF2 alpha (PGFM) concentration were also measured by radioimmunoassay. For caruncular tissue, less thromboxane B2 (TXB2) and more 6-keto prostaglandin F1 alpha (PGIM) was synthesized in tissue from the animals with RFM than in the controls. Oxytocin, PAF, EGF and A23187 increased only PGIM production in the control animals; A23187 also decreased TBX2 synthesis. For the allantochorion, more PGE2, leukotriene B4 (LTB4) and PGIM and less TXB2, PGF2 alpha and hydroxyecosatetranoic acids (HETE) was synthesized in tissue from cows with RFM than from animals that delivered normally. All of the substances used in this study increased PGIM, PGF2 alpha and LTB4 and decreased TXB2 production by the allantochorionic tissue in control animals. The metabolism of AA by the allantochorionic tissue seems quantitatively under hormonal control. The metabolism of AA at the level of both maternal and fetal components of the placenta in cows with RFM differed from that seen in animals that expelled the membranes normally.
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Affiliation(s)
- H Slama
- Centre de Recherche en Reproduction Animale, Universite de Montreal, Faculte de Medecine Veterinaire St-Hyacinthe, Quebec
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38
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Bouchard G, Youngquist RS, Vaillancourt D, Krause GF, Guay P, Paradis M. Seasonality and variability of the interestrous interval in the bitch. Theriogenology 1991; 36:41-50. [PMID: 16726976 DOI: 10.1016/0093-691x(91)90432-d] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/1990] [Accepted: 04/18/1991] [Indexed: 11/21/2022]
Abstract
Records from two breeding colonies (A and B) located near each other were analyzed for this experiment. Colony A consisted of 19 bitches (8 Maltese, 5 Yorkshire, 3 Lhasa Apso, and 3 Bouvier des Flandres), while Colony B consisted of 48 Beagle bitches. A total of 126 interestrous intervals (141 estrous cycles) from Colony A were reviewed to quantitate the variability of the interestrous interval. Analysis of variance showed that the degree of variation of the estrous cycle length within bitches (65%) was about twice the degree of variation of means of the estrous cycle length among bitches (35%). It was found that the estrous cycle length is extremely variable, and it cannot be used to predict the next estrus in a single bitch, although some bitches were very consistent. The seasonal and monthly distribution of estrous cycles throughout the year was also analyzed from bitches kept in Colonies A and B for a total of 210 estrous cycles. The data were collected over a four-year period. A seasonal pattern was observed when the cumulative distributions over years were analyzed. A higher frequency of estrous cycles was observed during winter and summer. This seasonality pattern was not observed when individual years were analyzed separately. However, the overall probability that an estrus would occur at any month of the year was the same for each month (1/12) when cumulative distribution over years were analyzed.
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Affiliation(s)
- G Bouchard
- Department of Medicine and Surgery, Agricultural Experimental Station, University of Missouri, Columbia, MO 65211, USA
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Desaulniers DM, Guay P, Vaillancourt D. Estrus induction with prostaglandin F2α, cloprostenol or fenprostalene during the normal estrous cycle, superovulation and after embryo collection. Theriogenology 1990; 34:667-82. [PMID: 16726871 DOI: 10.1016/0093-691x(90)90022-l] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/1990] [Accepted: 08/08/1990] [Indexed: 11/30/2022]
Abstract
Holstein heifers used as embryo donors were treated with three luteolytic agents (PGF2alpha, cloprostenol, fenprostalene) during the normal estrous cycle, superovulation or after embryo collection to determine the interval from treatment to estrus. A similar return-to-estrus interval was observed for each luteolytic agent among the three groups of heifers. Nevertheless, after embryo collection, fenprostalene had a tendency to induce the longest delays (p = 0.08). This tendency is supported by a higher proportion of delayed luteolysis and more heifers showing estrus later than 11 d post treatment. Also, during normal estrous cycles, 5/10 and 0/8 fenprostalene- and cloprostenol-treated heifers, respectively, showed progesterone concentrations higher than 1 ng/mL 48 h after treatment. Regardless of the luteolytic agent used, estrus was induced earlier (P < 0.005) during superovulation than when heifers were treated between Days 9 to 16 of the normal estrous cycle or after embryo collection. However, the return-to-estrus interval was similar between heifers treated during superovulation and those treated between Days 6 to 8 of the normal estrous cycle. After embryo collection, intervals before the return to estrus increased with the number of Corpora lutea (CL) palpated except in the nonresponding group (0 to 1 CL), which returned to estrus later than the low responding group (2 to 4 CL).
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Affiliation(s)
- D M Desaulniers
- Centre de Recherche en Reproduction Animale Faculté de Médecine Vétérinaire, Université de Montréal C.P. 5000, St-Hyacinthe, Québec, Canada, J2S 7C6
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Vaillancourt D, Harvey D. The theory of relativity and early pregnancy diagnosis examination in dairy cows. Can Vet J 1990; 31:334-5. [PMID: 17423575 PMCID: PMC1480725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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Moody BL, Fanale JE, Thompson M, Vaillancourt D, Symonds G, Bonasoro C. Impact of staff education on pressure sore development in elderly hospitalized patients. Arch Intern Med 1988; 148:2241-3. [PMID: 3178381] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
To test the hypothesis that an educational program alone without the introduction of new technology could result in both higher quality care and cost savings, the incidence of development of pressure sores among patients over the age of 65 years was concurrently reviewed before and after an education program developed and disseminated by a skin care team composed of physicians and nurses. Before the education program, 18 (14.6%) of 123 patients with no pressure sores developed pressure sores during their hospital admission. After the education program, only six (5.4%) of 105 patients who entered the hospital with intact skin developed a pressure sore during their hospital stay. The data show that an educational program was effective in decreasing by 63% the development of pressure sores in an elderly hospitalized population. Furthermore, a cost savings of $74,372 in the use of special care beds was realized.
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Affiliation(s)
- B L Moody
- Department of Internal Medicine, Worcester Memorial Hospital, MA 01605
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Lafrance M, Goff AK, Vaillancourt D, Guay P. Effect of the myorelaxant clenbuterol on the oxytocin-induced release of prostaglandin F2 alpha in ovariectomized heifers. Prostaglandins 1988; 35:163-71. [PMID: 3163154 DOI: 10.1016/0090-6980(88)90084-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Clenbuterol, as other sympathomimetic drugs, relaxes the myometrium, thus causing a short-term inhibition of labor and the delay of parturition. This study has examined the influence of clenbuterol on the release of prostaglandin F2 alpha (PGF2 alpha) induced by oxytocin alone or with estradiol-17 beta. Five bilaterally ovariectomized heifers, primed with progesterone for 14 days, were used in two experiments. In the first they received two i.v. injections of oxytocin 6h apart, with and without an i.v. injection of clenbuterol before the second oxytocin injection; the second experiment was similar to the first except that the animals were given estradiol-17 beta 30 min after the first oxytocin injection. Frequent blood samples were taken for the measurement of 13,14-dihydro-15-keto-PGF2 alpha by radioimmunoassay. The data show that clenbuterol does not influence PGF2 alpha release in response to oxytocin alone or with estradiol-17 beta, and it does not inhibit the basal release of PGF2 alpha. This suggests that clenbuterol does not act on the endometrium to alter the secretion of PGF2 alpha in the non-pregnant cow.
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Affiliation(s)
- M Lafrance
- Centre de recherche en reproduction animale, Faculté de médecine vétérinaire, Université de Montréal, St-Hyacinthe, Québec, Canada
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Vaillancourt D. Physiopathologie et thérapeutique de l'utérus en période puerpérale chez la vache laitière: revue. Can Vet J 1987; 28:330-7. [PMID: 17422803 PMCID: PMC1680639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Accurate diagnosis and effective therapeutics of uterine pathologies in cattle represent some of the daily preoccupations for the veterinarians involved in herd health medicine. A rational approach requires a competence based on fundamental and clinical knowledge.The physiological aspects of the uterine involution in cattle are reviewed with emphasis about the in utero bacteriological dynamic and the endocrinological evolution during this period. The pathogenesis of uterine pathologies is discussed following new research results and new knowledge on the mechanisms of uterine defense. The value and limitations of the clinical diagnosis is briefly reviewed. The therapeutics of uterine pathologies is debated in relation with the pathophysiology of the uterine involution and with the rational of the traditional and new concepts of the treatment of the postpartum uterine pathologies.
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Vaillancourt D, Bierschwal CJ, Ogwu D, Elmore RG, Martin CE, Sharp AJ, Youngquist RS. Correlation between pregnancy diagnosis by membrane slip and embryonic mortality. J Am Vet Med Assoc 1979; 175:466-8. [PMID: 500480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In a study involving 7,477 pregnant cows (5,426 Holstein-Friesians and 2,051 Guernseys), each pregnancy was diagnosed by rectal palpation, using the membrane slip technique. Each cow was examined twice, first by a veterinary student, then by a clinician. Of the cows diagnosed pregnant, 7,058 (94.4%) calved. The embryonic death rate in cows examined during the first 50 days of gestation was significantly (P less than 0.001) greater than that associated with examinations after 50 days of gestation. A significant difference was found between herds in different years (P less than 0.05). There was no conclusive indication that embryonic loss at the time of or shortly after early examination was iatrogenic abortion resulting from the membrane slip technique.
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Smart ME, Ferguson JG, Vaillancourt D. Sequela to a urachal abscess in a Hereford heifer (a case report). Vet Med Small Anim Clin 1978; 73:1557-8. [PMID: 252346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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