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Teng E, Manser PT, Shah M, Pickthorn K, Hu N, Djakovic S, Swendsen H, Blendstrup M, Faccin G, Ostrowitzki S, Sink KM. The Use of Episodic Memory Tests for Screening in Clinical Trials for Early Alzheimer's Disease: A Comparison of the Free and Cued Selective Reminding Test (FCSRT) and the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). J Prev Alzheimers Dis 2022; 10:41-49. [PMID: 36641609 DOI: 10.14283/jpad.2022.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Screening procedures for early Alzheimer's disease (AD) trials seek to efficiently identify participants who fulfill clinical and biomarker criteria for AD and enrich for those most likely to experience significant clinical progression during the study. Episodic memory performance is often assessed in screening, but the utility of different memory tests for optimizing screening efficiency and/or rates of clinical progression remains uncertain. OBJECTIVES Cross-study comparisons of the effects of inclusion criteria based on performance on the Free and Cued Selective Reminding Test (FCSRT) or the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) on screen-failure rates for episodic memory and β-amyloid (Aβ) positivity (by CSF or PET) and on subsequent rates of clinical disease progression in randomized participants across three clinical trials in early (prodromal-to-mild) AD. DESIGN Secondary analyses of cross-sectional and longitudinal clinical trial data. SETTING Multi-center international clinical trials. PARTICIPANTS Individuals with prodromal-to-mild AD screened and/or randomized in clinical trials for crenezumab (CREAD, CREAD2) or semorinemab (Tauriel). Cross-sectional analyses of screening data for episodic memory impairment included participants from CREAD2 (n=2897) and Tauriel (n=887) and for Aβ positivity included participants from CREAD (n=1138), CREAD2 (n=1119), and Tauriel (n=483). Longitudinal analyses of rates of clinical progression included participants from CREAD (n=779), CREAD2 (n=773), and Tauriel (n=331). MEASUREMENTS Cross-sectional analyses examined eligibility rates per cutoffs defined for the FCSRT (CREAD, CREAD2) or RBANS (Tauriel) and per Aβ positivity using CSF and/or PET biomarkers. Longitudinal analyses examined rates of clinical progression on the Clinical Dementia Rating-Sum of Boxes (CDR-SB), the 13-item version of the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-Cog13), and Alzheimer's Disease Cooperative Study-Activities of Daily Living Scale (ADCS-ADL). RESULTS Lower rates of study eligibility per episodic memory criteria were seen with the FCSRT (CREAD2) relative to the RBANS (Tauriel), but similar rates of eligibility per Aβ positivity criteria were seen amongst participants with episodic memory impairment per the cutoffs used on either assessment. Similar rates of clinical decline over 18 months on the CDR-SB, ADAS-Cog13, and ADCS-ADL were observed in study populations enriched using the FCSRT (CREAD, CREAD2) or the RBANS (Tauriel). CONCLUSIONS Cutoffs for episodic memory impairment on the FCSRT used in the CREAD and CREAD2 studies are more stringent than those on the RBANS used in the Tauriel study, resulting in lower rates of eligibility. However, given that study enrichment with either test yields similar rates of Aβ positivity and clinical progression, considerations beyond these factors may drive the decision of which assessment to use for screening in early AD clinical trials.
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Affiliation(s)
- E Teng
- Edmond Teng, MD, PhD, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, Tel: 650-467-1661, Fax: 650-467-2887,
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Iyer AS, Jones FK, Nodoushani A, Kelly M, Becker M, Slater D, Mills R, Teng E, Kamruzzaman M, Garcia-Beltran WF, Astudillo M, Yang D, Miller TE, Oliver E, Fischinger S, Atyeo C, Iafrate AJ, Calderwood SB, Lauer SA, Yu J, Li Z, Feldman J, Hauser BM, Caradonna TM, Branda JA, Turbett SE, LaRocque RC, Mellon G, Barouch DH, Schmidt AG, Azman AS, Alter G, Ryan ET, Harris JB, Charles RC. Persistence and decay of human antibody responses to the receptor binding domain of SARS-CoV-2 spike protein in COVID-19 patients. Sci Immunol 2020; 5:eabe0367. [PMID: 33033172 PMCID: PMC7857394 DOI: 10.1126/sciimmunol.abe0367] [Citation(s) in RCA: 435] [Impact Index Per Article: 108.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/05/2020] [Indexed: 12/11/2022]
Abstract
We measured plasma and/or serum antibody responses to the receptor-binding domain (RBD) of the spike (S) protein of SARS-CoV-2 in 343 North American patients infected with SARS-CoV-2 (of which 93% required hospitalization) up to 122 days after symptom onset and compared them to responses in 1548 individuals whose blood samples were obtained prior to the pandemic. After setting seropositivity thresholds for perfect specificity (100%), we estimated sensitivities of 95% for IgG, 90% for IgA, and 81% for IgM for detecting infected individuals between 15 and 28 days after symptom onset. While the median time to seroconversion was nearly 12 days across all three isotypes tested, IgA and IgM antibodies against RBD were short-lived with median times to seroreversion of 71 and 49 days after symptom onset. In contrast, anti-RBD IgG responses decayed slowly through 90 days with only 3 seropositive individuals seroreverting within this time period. IgG antibodies to SARS-CoV-2 RBD were strongly correlated with anti-S neutralizing antibody titers, which demonstrated little to no decrease over 75 days since symptom onset. We observed no cross-reactivity of the SARS-CoV-2 RBD-targeted antibodies with other widely circulating coronaviruses (HKU1, 229 E, OC43, NL63). These data suggest that RBD-targeted antibodies are excellent markers of previous and recent infection, that differential isotype measurements can help distinguish between recent and older infections, and that IgG responses persist over the first few months after infection and are highly correlated with neutralizing antibodies.
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Affiliation(s)
- Anita S Iyer
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Forrest K Jones
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ariana Nodoushani
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Meagan Kelly
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Margaret Becker
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Damien Slater
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Rachel Mills
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Erica Teng
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Mohammad Kamruzzaman
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | | | - Michael Astudillo
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Diane Yang
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Tyler E Miller
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Elizabeth Oliver
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | | | - Caroline Atyeo
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - A John Iafrate
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Stephen B Calderwood
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Stephen A Lauer
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jingyou Yu
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Zhenfeng Li
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Jared Feldman
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Blake M Hauser
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | | | - John A Branda
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Sarah E Turbett
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Regina C LaRocque
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Guillaume Mellon
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Dan H Barouch
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Aaron G Schmidt
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
- Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Andrew S Azman
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Edward T Ryan
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jason B Harris
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Richelle C Charles
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA.
- Department of Medicine, Harvard Medical School, Boston, MA, USA
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Iyer AS, Jones FK, Nodoushani A, Kelly M, Becker M, Slater D, Mills R, Teng E, Kamruzzaman M, Garcia-Beltran WF, Astudillo M, Yang D, Miller TE, Oliver E, Fischinger S, Atyeo C, Iafrate AJ, Calderwood SB, Lauer SA, Yu J, Li Z, Feldman J, Hauser BM, Caradonna TM, Branda JA, Turbett SE, LaRocque RC, Mellon G, Barouch DH, Schmidt AG, Azman AS, Alter G, Ryan ET, Harris JB, Charles RC. Dynamics and significance of the antibody response to SARS-CoV-2 infection. medRxiv 2020:2020.07.18.20155374. [PMID: 32743600 PMCID: PMC7386524 DOI: 10.1101/2020.07.18.20155374] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Characterizing the humoral immune response to SARS-CoV-2 and developing accurate serologic assays are needed for diagnostic purposes and estimating population-level seroprevalence. METHODS We measured the kinetics of early antibody responses to the receptor-binding domain (RBD) of the spike (S) protein of SARS-CoV-2 in a cohort of 259 symptomatic North American patients infected with SARS-CoV-2 (up to 75 days after symptom onset) compared to antibody levels in 1548 individuals whose blood samples were obtained prior to the pandemic. RESULTS Between 14-28 days from onset of symptoms, IgG, IgA, or IgM antibody responses to RBD were all accurate in identifying recently infected individuals, with 100% specificity and a sensitivity of 97%, 91%, and 81% respectively. Although the estimated median time to becoming seropositive was similar across isotypes, IgA and IgM antibodies against RBD were short-lived with most individuals estimated to become seronegative again by 51 and 47 days after symptom onset, respectively. IgG antibodies against RBD lasted longer and persisted through 75 days post-symptoms. IgG antibodies to SARS-CoV-2 RBD were highly correlated with neutralizing antibodies targeting the S protein. No cross-reactivity of the SARS-CoV-2 RBD-targeted antibodies was observed with several known circulating coronaviruses, HKU1, OC 229 E, OC43, and NL63. CONCLUSIONS Among symptomatic SARS-CoV-2 cases, RBD-targeted antibodies can be indicative of previous and recent infection. IgG antibodies are correlated with neutralizing antibodies and are possibly a correlate of protective immunity.
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Affiliation(s)
- Anita S. Iyer
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Forrest K. Jones
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ariana Nodoushani
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Meagan Kelly
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Margaret Becker
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Damien Slater
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Rachel Mills
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Erica Teng
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Mohammad Kamruzzaman
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | | | - Michael Astudillo
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Diane Yang
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Tyler E. Miller
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Elizabeth Oliver
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | | | - Caroline Atyeo
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - A. John Iafrate
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Stephen B. Calderwood
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Stephen A. Lauer
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jingyou Yu
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Zhenfeng Li
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Jared Feldman
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Blake M. Hauser
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | | | - John A. Branda
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Sarah E. Turbett
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Regina C. LaRocque
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Guillaume Mellon
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Dan H. Barouch
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Aaron G. Schmidt
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
- Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Andrew S. Azman
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Edward T Ryan
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jason B. Harris
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Richelle C. Charles
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
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Campbell PM, Corneau E, Nishimura D, Teng E, Ekoualla D. Cost-benefit analysis for a lead wheel weight phase-out in Canada. Sci Total Environ 2018; 637-638:79-90. [PMID: 29742477 DOI: 10.1016/j.scitotenv.2018.04.414] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 04/17/2018] [Accepted: 04/30/2018] [Indexed: 05/22/2023]
Abstract
Lead wheel weights (LWWs) have been banned in Europe, and some US States, but they continue to dominate the market in Canada. Exposure to lead is associated with numerous health impacts and can result in multiple and irreversible health problems which include cognitive impairment when exposure occurs during early development. Such impacts incur high individual and social costs. The purpose of this study was to assess the costs and public health benefits of a Risk Management Strategy (RMS) that would result from a LWW phase-out in Canada and compare this to a Business-As-Usual (BAU) scenario. The contribution of LWWs to lead concentrations in media including roadway soil/dust, ambient and indoor air, and indoor dust were estimated. The Integrated Exposure Uptake Biokinetic Model for Lead in Children (IEUBK) was used to develop estimates for the blood lead levels (BLLs) in children (μg/dL) associated with the BAU and the RMS. The BLLs estimated via the IEUBK model were then used to assess the IQ decrements associated with the BAU that would be avoided under the RMS. The subsequent overall societal benefits in terms of increased lifetime earning potential and reduced crime rate, were then estimated and compared to industry and government costs. LWWs form 72% of the Canadian wheel weight market and >1500 tonnes of lead as new LWWs attached to vehicles enters Canadian society annually. We estimate that 110-131 tonnes of lead in detached WWs are abraded on roadways in Canada each year. A LWW phase-out was predicted to result in a drop in pre-school BLLs of up to 0.4 μg/dL. The estimated net benefits associated with the RMS based on cognitive decrements avoided and hence increased lifetime earning potential (increased productivity) and reduced crime are expected to be: C$248 million (8% discount rate) to C$1.2 billion (3% discount rate) per year.
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Affiliation(s)
- P M Campbell
- Toxecology - Environmental Consulting Ltd, The Paris Block, 204-53 West Hastings Street, Vancouver, BC V6B 1G4, Canada.
| | - E Corneau
- Environment and Climate Change Canada, 351 Boulevard Saint-Joseph, Gatineau, Quebec K1A 0H3, Canada
| | - D Nishimura
- Toxecology - Environmental Consulting Ltd, The Paris Block, 204-53 West Hastings Street, Vancouver, BC V6B 1G4, Canada
| | - E Teng
- Toxecology - Environmental Consulting Ltd, The Paris Block, 204-53 West Hastings Street, Vancouver, BC V6B 1G4, Canada
| | - D Ekoualla
- Environment and Climate Change Canada, 351 Boulevard Saint-Joseph, Gatineau, Quebec K1A 0H3, Canada
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Song Y, Fung CH, McGowan S, Jouldjian S, Josephson KR, Mitchell MN, McCurry SM, Irwin MR, Teng E, Alessi CA, Martin JL. 0708 Sleep and Daytime Dysfunction Among Women Veterans: The Impact of Caregiving. Sleep 2018. [DOI: 10.1093/sleep/zsy061.707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Song
- University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA
| | - C H Fung
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - S McGowan
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - S Jouldjian
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - K R Josephson
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - M N Mitchell
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - S M McCurry
- University of Washington, School of Nursing, Department of Psychosocial and Community Health, Seattle, WA
| | - M R Irwin
- University of California, Los Angeles, Semel Institute for Neuroscience and Human Behavior, Cousins Center for Psychoneuroimmunology, Los Angeles, CA
| | - E Teng
- University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA
| | - C A Alessi
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
| | - J L Martin
- VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
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Teng E, Tassniyom K, Lu P. Reduced Quality of Life Ratings in Mild Cognitive Impairment: Analyses of Subject and Informant Responses (P04.208). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p04.208] [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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LaMarre A, Rascovsky K, Bostrom A, Toofanian P, Wilkins S, Giles K, Sha S, Perry D, Tartaglia C, Kang G, Galasko D, Salmon D, Lehmer M, Farias S, Kaur B, Olichney J, Quitania Park L, Mendez M, Tsai P, Teng E, Miller B, Kramer J. Inter-Rater Reliability of the New Criteria for Behavioral Variant Frontotemporal Dementia (PD1.001). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.pd1.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Ringman JM, Taylor K, Teng E, Coppola G, Gylys K. Longitudinal change in CSF biomarkers in a presymptomatic carrier of an APP mutation. Neurology 2011; 76:2124-5. [PMID: 21562250 DOI: 10.1212/wnl.0b013e31821f4488] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- J M Ringman
- Easton Center for Alzheimer's Disease Research, UCLA Department of Neurology, Los Angeles, CA 90095-7226, USA
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Abstract
OBJECTIVE To determine whether the presence of depression predicts higher rate of progression to Alzheimer disease (AD) in patients with amnestic mild cognitive impairment (aMCI) and whether donepezil treatment beneficially affect this relationship. METHODS The study sample was composed of 756 participants with aMCI from the 3-year, double-blind, placebo-controlled Alzheimer's Disease Cooperative Study drug trial of donepezil and vitamin E. Beck Depression Inventory (BDI) was used to assess depressive symptoms at baseline and participants were followed either to the end of study or to the primary endpoint of progression to probable or possible AD. RESULTS Cox proportional hazards regression, adjusted for age at baseline, gender, apolipoprotein genotype, and NYU paragraph delayed recall score, showed that higher BDI scores were associated with progression to AD (p = 0.03). The sample was stratified into depressed (BDI score > or =10; n = 208) and nondepressed (BDI <10; n = 548) groups. Kaplan-Meier analysis showed that among the depressed subjects, the proportion progressing to AD was lower for the donepezil group than the combined vitamin E and placebo groups at 1.7 years (p = 0.023), at 2.2 years (p = 0.025), and remained marginally lower at 2.7 years (p = 0.070). The survival curves among the three treatment groups did not differ within the nondepressed participants. CONCLUSIONS Results suggest that depression is predictive of progression from amnestic mild cognitive impairment (aMCI) to Alzheimer disease (AD) and treatment with donepezil delayed progression to AD among depressed subjects with aMCI. Donepezil appears to modulate the increased risk of AD conferred by the presence of depressive symptoms.
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Affiliation(s)
- P H Lu
- Departments of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
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Beerheide W, Tan YJ, Teng E, Ting AE, Jedpiyawongse A, Srivatanakul P. Downregulation of proapoptotic proteins Bax and Bcl-X(S) in p53 overexpressing hepatocellular carcinomas. Biochem Biophys Res Commun 2000; 273:54-61. [PMID: 10873563 DOI: 10.1006/bbrc.2000.2891] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
As the occurrence of structural p53 mutations in hepatocellular carcinoma (HCC) in Thailand was previously reported to be much lower than that found in other high-incidence HCC areas, we analyzed 16 HCC samples from Thailand to determine the expression and functionality of p53 protein. We observed the overexpression of p53 protein in 69% of HCC, despite the prevalence of the wild-type p53 gene. However, the overexpressed p53 protein was nonfunctional as suggested by its inability to modulate the expressions of several p53 effector proteins (p21 and Bcl-2 family proteins). In addition, we observed significant underexpression of two proapoptotic proteins, Bax and Bcl-X(S), in 81% (P = 0.02) and 64% (P = 0.03) of HCC, respectively. Consequently, the ratios of proapoptotic to antiapoptotic BCL-2 family proteins were reduced in 88% of the HCC tumor tissues when compared to normal tissues, such that the rheostat between BCL-2 family proteins is strongly skewed toward enhanced cell survival in the tumor cells.
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Affiliation(s)
- W Beerheide
- Institute of Molecular and Cell Biology, 30 Medical Drive, Singapore, 117609, Republic of Singapore
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Teng E, Stefanacci L, Squire LR, Zola SM. Contrasting effects on discrimination learning after hippocampal lesions and conjoint hippocampal-caudate lesions in monkeys. J Neurosci 2000; 20:3853-63. [PMID: 10804225 PMCID: PMC6772685] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Eighteen monkeys with lesions of the hippocampal region (the hippocampus proper, the dentate gyrus, and the subiculum) made by an ischemic procedure, radio frequency, or ibotenic acid were tested on a simple, two-choice object discrimination learning task that has been shown to be sensitive to large lesions of the medial temporal lobe. The monkeys were also tested on two other discrimination tasks (pattern discrimination and eight-pair concurrent discrimination) that can be learned normally by monkeys with large medial temporal lobe lesions. All of the lesion groups were impaired at learning the simple object discrimination task. Seven of the monkeys who had sustained damage to the hippocampal region also sustained damage to the tail of the caudate nucleus. These seven monkeys, but not the other 11 monkeys with hippocampal lesions, were impaired on pattern discrimination and concurrent discrimination learning. The results suggest that the hippocampal region is important for learning easy, two-choice discriminations, whereas the caudate nucleus is necessary for the normal learning of more difficult, gradually acquired discrimination tasks. The findings support the distinction between declarative memory, which depends on the hippocampus and related medial temporal lobe structures, and habit learning, which depends on the caudate nucleus.
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Affiliation(s)
- E Teng
- Veterans Affairs Medical Center, San Diego, California 92161, and Departments of Psychiatry, Neurosciences, and Psychology, University of California, La Jolla 92093, USA
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Zola SM, Squire LR, Teng E, Stefanacci L, Buffalo EA, Clark RE. Impaired recognition memory in monkeys after damage limited to the hippocampal region. J Neurosci 2000; 20:451-63. [PMID: 10627621 PMCID: PMC6774137] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
Monkeys with lesions limited to the hippocampal region (the hippocampus proper, the dentate gyrus, and the subiculum) were impaired on two tasks of recognition memory: delayed nonmatching to sample and the visual paired-comparison task. Recognition memory was impaired in five different groups of monkeys, whether the lesions were made by an ischemic procedure, by radio frequency, or by ibotenic acid. The finding that the hippocampal region is essential for normal recognition memory performance is considered in the context of current ideas about the role of the hippocampus in declarative memory.
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Affiliation(s)
- S M Zola
- Veterans Affairs Medical Center, San Diego, California 92126, USA.
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Buffalo EA, Ramus SJ, Clark RE, Teng E, Squire LR, Zola SM. Dissociation between the effects of damage to perirhinal cortex and area TE. Learn Mem 1999; 6:572-99. [PMID: 10641763 PMCID: PMC311316 DOI: 10.1101/lm.6.6.572] [Citation(s) in RCA: 203] [Impact Index Per Article: 8.1] [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: 08/30/1999] [Accepted: 10/21/1999] [Indexed: 11/24/2022]
Abstract
Perirhinal cortex and area TE are immediately adjacent to each other in the temporal lobe and reciprocally interconnected. These areas are thought to lie at the interface between visual perception and visual memory, but it has been unclear what their separate contributions might be. In three experiments, monkeys with bilateral lesions of the perirhinal cortex exhibited a different pattern of impairment than monkeys with bilateral lesions of area TE. In experiment 1, lesions of the perirhinal cortex produced a multimodal deficit in recognition memory (delayed nonmatching to sample), whereas lesions of area TE impaired performance only in the visual modality. In experiment 2, on a test of visual recognition memory (the visual paired comparison task) lesions of the perirhinal cortex impaired performance at long delays but spared performance at a very short delay. In contrast, lesions of area TE impaired performance even at the short delay. In experiment 3, lesions of the perirhinal cortex and lesions of area TE produced an opposite pattern of impairment on two visual discrimination tasks, simple object discrimination learning (impaired only by perirhinal lesions), and concurrent discrimination learning (impaired only by TE lesions). Taken together, the findings suggest that the perirhinal cortex, like other medial temporal lobe structures, is important for the formation of memory, whereas area TE is important for visual perceptual processing.
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Affiliation(s)
- E A Buffalo
- Department of Neurosciences, University of California, San Diego, La Jolla 92093, USA
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Abstract
Although nitric oxide (NO) production is increased in HIV-1-infected patients, and NO is known to inhibit the replication of several viruses, very little is known about the effects of NO on HIV-1 replication. In the present studies, we find that S-nitrosothiols (RSNOs), a class of NO donor compounds present in the human circulatory system, inhibit HIV-1 replication in acutely infected human peripheral blood mononuclear cells (PBMCs) and have an additive inhibitory effect on HIV-1 replication in combination with 3'-azido-3'-deoxythymidylate (AZT). RSNOs inhibit HIV-1 replication in acutely infected PBMCs at a step in the viral replicative cycle after reverse transcription, but before or during viral protein expression through a cGMP-independent mechanism. In the latently infected U1 cell line, NO donor compounds and intracellular NO production stimulate HIV-1 reactivation. These studies suggest that NO both inhibits HIV-1 replication in acutely infected cells and stimulates HIV-1 reactivation in chronically infected cells. Thus, NO may have a physiologic role in HIV-1 replication, and NO donor compounds, which have been used for decades in the treatment of coronary artery disease with limited toxicity, might be useful in the treatment of HIV-1 disease by inhibiting acute infection, reactivating latent virus, or both.
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Affiliation(s)
- J B Mannick
- Department of Adult Oncology, Dana Farber Cancer Institute, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
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Abstract
The hippocampus is part of a system of structures in the medial temporal lobe that are essential for memory. One influential view of hippocampal function emphasizes its role in the acquisition and retrieval of spatial knowledge. By this view, the hippocampus constructs and stores spatial maps and is therefore essential for learning and remembering places, including those learned about long ago. We tested a profoundly amnesic patient (E.P.), who has virtually complete bilateral damage to the hippocampus and extensive damage to adjacent structures in the medial temporal lobe. We asked him to recall the spatial layout of the region where he grew up, from which he moved away more than 50 years ago. E.P. performed as well as or better than age-matched control subjects who grew up in the same region and also moved away. In contrast, E.P. has no knowledge of his current neighbourhood, to which he moved after he became amnesic. Our results show that the medial temporal lobe is not the permanent repository of spatial maps, and support the view that the hippocampus and other structures in the medial temporal lobe are essential for the formation of long-term declarative memories, both spatial and non-spatial, but not for the retrieval of very remote memories, either spatial or non-spatial.
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Affiliation(s)
- E Teng
- Veterans Affairs Medical Center, San Diego, California 92161, USA
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Marshall WL, Brinkman BM, Ambrose CM, Pesavento PA, Uglialoro AM, Teng E, Finberg RW, Browning JL, Goldfeld AE. Signaling through the lymphotoxin-beta receptor stimulates HIV-1 replication alone and in cooperation with soluble or membrane-bound TNF-alpha. J Immunol 1999; 162:6016-23. [PMID: 10229841] [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] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The level of ongoing HIV-1 replication within an individual is critical to HIV-1 pathogenesis. Among host immune factors, the cytokine TNF-alpha has previously been shown to increase HIV-1 replication in various monocyte and T cell model systems. Here, we demonstrate that signaling through the TNF receptor family member, the lymphotoxin-beta (LT-beta) receptor (LT-betaR), also regulates HIV-1 replication. Furthermore, HIV-1 replication is cooperatively stimulated when the distinct LT-betaR and TNF receptor systems are simultaneously engaged by their specific ligands. Moreover, in a physiological coculture cellular assay system, we show that membrane-bound TNF-alpha and LT-alpha1beta2 act virtually identically to their soluble forms in the regulation of HIV-1 replication. Thus, cosignaling via the LT-beta and TNF-alpha receptors is probably involved in the modulation of HIV-1 replication and the subsequent determination of HIV-1 viral burden in monocytes. Intriguingly, surface expression of LT-alpha1beta2 is up-regulated on a T cell line acutely infected with HIV-1, suggesting a positive feedback loop between HIV-1 infection, LT-alpha1beta2 expression, and HIV-1 replication. Given the critical role that LT-alpha1beta2 plays in lymphoid architecture, we speculate that LT-alpha1beta2 may be involved in HIV-associated abnormalities of the lymphoid organs.
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Affiliation(s)
- W L Marshall
- Center for Blood Research and Division of Adult Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
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Marshall WL, Datta R, Hanify K, Teng E, Finberg RW. U937 cells overexpressing bcl-xl are resistant to human immunodeficiency virus-1-induced apoptosis and human immunodeficiency virus-1 replication. Virology 1999; 256:1-7. [PMID: 10087220 DOI: 10.1006/viro.1999.9599] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Many viruses, including human immunodeficiency virus type 1 (HIV-1), induce apoptosis and are affected by cellular expression of antiapoptotic genes. We sought to examine the effect of antiapoptotic gene expression on HIV replication by transfecting the promyelomonocytic cell line U937 with the bcl-xl gene to obtain clones of U937 cells that overexpressed bcl-xl (designated U937bcl-xl), a negative control U937 clone transfected with vector alone (designated U937neo) and a clone overexpressing bcl-2 (designated U937bcl-2). After infection with HIV-1, U937neo cells underwent apoptosis four times as frequently as the U937bcl-xl cells. Furthermore, U937bcl-xl cells produced 5-fold less HIV-1 protein than U937neo, whereas U937bcl-2 produced at least 2-fold more p24 than the U937neo control. Transient coexpression of bcl-2 or bcl-xl decreased HIV production and transcription from the HIV LTR. To define the mechanism by which bcl-xl, but not bcl-2, inhibits HIV expression, we examined bcl-2 and bcl-xl expression after HIV infection and CD4 cross-linking. Although HIV-1 infection or cross-linking CD4 led to a decrease in expression of bcl-2, it had no effect on bcl-xl expression. These results provide a mechanism for the resistance of U937bcl-xl transfectants, but not U937bcl-2 transfectants, to HIV-1 replication in monocytic cells in vitro. Therapies that up-regulate bcl-xl expression potentially provide a novel means to decrease the destructiveness of HIV-1.
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Affiliation(s)
- W L Marshall
- Dana-Farber Cancer Institute, Boston, Massachusetts, 02115, USA.
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Abstract
Enkephalins are opioid peptides that bridge the neuroendocrine and immune systems. Using flow cytometry and a fluorescein conjugate of the endogenous pentapeptide methionine-enkephalin (ME), we have identified enkephalin receptors on cultured human lymphocytes. Cell surface recognition sites that bound ME with high affinity and specificity were detected for NALM 6 (pre-B acute lymphoblastic leukemia) and Jurkat (T lymphoma) cells. Brain-like enkephalin receptors were measured for these lymphocytes using conventional radioligand-receptor assays and the highly delta opioid receptor-selective enkephalin analog [3H]DPDPE. Upon activation, the lymphocyte enkephalin receptors transmitted signals that enhanced the accumulation of intracellular cAMP. These studies provide evidence that cultured human lymphocytes of the B (NALM 6 cells) and T (Jurkat cells) lineages express functional enkephalin receptors and suggest that such receptors may be instrumental in the lymphocyte response to opioid peptides and alkaloids.
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Affiliation(s)
- W Heagy
- Laboratory of Infectious Diseases, Dana-Farber Cancer Institute, Boston, Massachusetts, 02115, USA.
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Taussig IM, Dick M, Teng E, Davis DS, Kempler D. Screening for depression in four ethnic groups: Comparisons between the Geriatric Depression Scale (GDS) and the Center for Epidemiological Studies Scale (CES-D). Arch Clin Neuropsychol 1999. [DOI: 10.1093/arclin/14.1.66a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Taussig I, Teng E, Kempler D, Davis D, Dick M. The cross-cultural common objectives memory test: Performance comparison among Hispanic, Chinese, Vietnamese, Caucasian, and African-American healthy older subjects. Arch Clin Neuropsychol 1998. [DOI: 10.1093/arclin/13.1.47a] [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: 11/12/2022] Open
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Teng E, Wilkins P. Lidocaine in status epilepticus. Ann Pharmacother 1994; 28:1248-9. [PMID: 7849339] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- E Teng
- School of Pharmacy, University of California, San Francisco
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Buchsbaum MS, Kesslak JP, Lynch G, Chui H, Wu J, Sicotte N, Hazlett E, Teng E, Cotman CW. Temporal and hippocampal metabolic rate during an olfactory memory task assessed by positron emission tomography in patients with dementia of the Alzheimer type and controls. Preliminary studies. Arch Gen Psychiatry 1991; 48:840-7. [PMID: 1929775 DOI: 10.1001/archpsyc.1991.01810330064010] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Positron emission tomography with fludeoxyglucose F 18 was used to assess cortical metabolic rate during an olfactory memory task in six patients with dementia of the Alzheimer type. Metabolic activity was compared with that of both age-matched controls performing the olfactory task and controls resting with their eyes closed. Patients had lower metabolic rates in the anterior portion of the medial-temporal cortex than did controls, and the difference was greatest between patients and the controls performing the memory task. This region is known to receive a large olfactory input and has been implicated in the encoding of human memory. Normal controls resting with their eyes closed had significantly lower metabolic rates in this area when compared with normal controls performing the task. Our results are consistent with those of earlier reports of temporal lobe decreases in metabolic rate and extend them through the examination of areas salient to the behavioral loss.
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Affiliation(s)
- M S Buchsbaum
- Brain Imaging Center, University of California, Irvine 92717
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