1
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Bantilan KS, Smith AN, Maurer MJ, Teruya-Feldstein J, Matasar MJ, Moskowitz AJ, Straus DJ, Noy A, Palomba ML, Horwitz SM, Hamlin PA, Portlock CS, Cerhan JR, Habermann TM, Salles GA, Nowakowski GS, Moskowitz CH, Zelenetz AD. Matched control analysis suggests R-CHOP followed by (R)-ICE may improve outcome in non-GCB DLBCL compared to R-CHOP. Blood Adv 2024:bloodadvances.2023011408. [PMID: 38271621 DOI: 10.1182/bloodadvances.2023011408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/17/2023] [Accepted: 12/06/2023] [Indexed: 01/27/2024] Open
Abstract
Rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) is considered the standard-of-care for patients with advanced-stage diffuse large B-cell lymphoma (DLBCL), despite findings that non-germinal center B-cell-like (non-GCB) patients have significantly worse outcome with this regimen. We evaluated the prognostic significance of baseline risk factors, including cell of origin (COO) classified by the Hans algorithm, within an alternative chemoimmunotherapy program. At Memorial Sloan Kettering Cancer Center (MSK), 151 patients with DLBCL received sequential R-CHOP induction and (R)-ICE (rituximab, ifosfamide, carboplatin, and etoposide) consolidation. Outcome analysis based on COO was validated with a propensity score matched cohort treated with R-CHOP from the Mayo Clinic component of the Molecular Epidemiology Resource (MER). Among the GCB (n=69) and non-GCB (n=69) patients at MSK, event-free survival (EFS) of non-GCB was superior to that of GCB (HR 0.53, 95% CI 0.29-0.98). Overall survival (OS) demonstrated an association in the same direction but was not statistically significant (HR 0.68, 95% CI 0.33-1.42). Propensity score matched patients from MSK (n=108) demonstrated a small attenuation in the HRs for EFS (HR 0.57, 95% CI 0.27-1.18) and OS (HR 0.76, 95% CI 0.33-1.79) and were no longer statistically significant. In contrast, the matched MER cohort (n=108) demonstrated an EFS association (HR 1.17, 95% CI 0.70-1.95) and OS association (HR 1.13, 95% CI 0.64-2.00) in the opposite direction, but were also not statistically significant. R-CHOP induction and (R)-ICE consolidation may overcome the negative prognostic impact of the non-GCB phenotype, per the Hans algorithm, and can be preferentially selected for this population.
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Affiliation(s)
- Kurt S Bantilan
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | | | | | | | - Matthew J Matasar
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, United States
| | - Alison J Moskowitz
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - David J Straus
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - Ariela Noy
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - M Lia Palomba
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - Steven M Horwitz
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - Paul A Hamlin
- Memorial Sloan-Kettering Cancer Center, New York, New York, United States
| | - Carol S Portlock
- Retired, Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | - James R Cerhan
- Mayo Clinic College of Medicine, Rochester, Minnesota, United States
| | | | - Gilles A Salles
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
| | | | - Craig H Moskowitz
- University of Miami Sylvester Comprehensive Cancer Center, Miami, Florida, United States
| | - Andrew D Zelenetz
- Memorial Sloan Kettering Cancer Center, New York, New York, United States
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2
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Abdallah NH, Smith AN, Geyer S, Binder M, Greipp PT, Kapoor P, Dispenzieri A, Gertz MA, Baughn LB, Lacy MQ, Hayman SR, Buadi FK, Dingli D, Hwa YL, Lin Y, Kourelis T, Warsame R, Kyle RA, Rajkumar SV, Kumar SK. Conditional survival in multiple myeloma and impact of prognostic factors over time. Blood Cancer J 2023; 13:78. [PMID: 37188699 DOI: 10.1038/s41408-023-00852-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/22/2023] [Accepted: 05/03/2023] [Indexed: 05/17/2023] Open
Abstract
Overall survival estimates from diagnosis are valuable for guiding treatment, but do not consider the years already survived. Conditional survival (CS) provides dynamic survival predictions over time. This study was conducted to estimate CS at 1-8 years from diagnosis and the impact of baseline prognostic factors on CS in multiple myeloma (MM) patients. This is a retrospective study including 2556 MM patients diagnosed between 2004 and 2019. CS (t | s) was defined as the probability of surviving t years given survival of s years. Median age was 64 years. Median follow-up was 6.2 years and median overall survival from diagnosis was 7.5 years. The 5-year CS estimates at s = 0, 1, 2, 3, and 5 years were 0.64, 0.61, 0.61, 0.61, and 0.58, respectively. On multivariate analysis, age ≥ 65 and proteasome inhibitor+immunomodulatory-based induction were associated with decreased survival and increased survival, respectively, retained at 5 years. The adverse impact of 1q gain/amplification, high-risk IgH translocation, and ISS-3 was significant at 1 and 3 years but not 5 years. Chromosome 17 abnormality was associated with decreased survival only at 1 year. Among MM patients, 5-year CS was stable at 1-5 years from diagnosis. The prognostic impact of high-risk cytogenetic factors decreased with additional years survived.
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Affiliation(s)
| | | | - Susan Geyer
- Department of biostatistics, Mayo Clinic, Rochester, MN, USA
| | - Moritz Binder
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Patricia T Greipp
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | | | | | - Morie A Gertz
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Linda B Baughn
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Martha Q Lacy
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | | | | | - David Dingli
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Yi L Hwa
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Yi Lin
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | | | - Rahma Warsame
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Robert A Kyle
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | | | - Shaji K Kumar
- Division of Hematology, Mayo Clinic, Rochester, MN, USA.
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3
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Desai SH, Mwangi R, Smith AN, Maurer MJ, Farooq U, King RL, Cerhan JR, Feldman AL, Habermann TM, Thompson CA, Wang Y, Ansell SM, Witzig TE, Nowakowski GS. Cell of origin is not associated with outcomes of relapsed or refractory diffuse large B cell lymphoma. Hematol Oncol 2023; 41:39-49. [PMID: 36305717 PMCID: PMC10037910 DOI: 10.1002/hon.3098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/19/2022] [Accepted: 10/22/2022] [Indexed: 02/03/2023]
Abstract
Activated B cell (ABC) type diffuse large B cell lymphoma (DLBCL), double hit lymphoma (DHL) and double expressor lymphoma (DEL) have poor outcomes to frontline R-CHOP but impact of these molecular features on outcomes of relapsed/refractory (R/R) disease is not well-characterized. We evaluated the association of diagnostic cell of origin (COO), double hit and double expressor status with overall survival after first relapse in DLBCL patients who were enrolled into the Molecular Epidemiology Resource (MER) cohort. COO was available from immunohistochemistry (IHC) using Hans criteria or gene expression profiling (GEP) (Nanostring) on the diagnostic FFPE biopsy. Of 373 pts with R/R DLBCL, 278 had COO by IHC: 152 were GCB, 107 were non-GCB. One hundred and fourty had COO by GEP: 44 were ABC, 65 were GCB and 13 were unclassifiable. Nineteen out of 163 (12%) were DHL; 30 out of 135 (22%) had DEL. COO, either by IHC (2 years OS GCB: 45% [CI95 : 38-54] vs. non-GCB: 44% [CI95 :36-55], p > 0.05) or GEP (2 years OS ABC: 42% [CI95 : 29-59] vs. GCB: 40% [CI95 : 30-54], p > 0.05), was not associated with difference in OS. DHL (2 years OS 16 [CI95 :6-45] vs. 45% [CI95 : 34-59], p < 0.01) and DEL (2 years OS 33% [CI95 : 20-56], vs. 50% [CI95 : 41-60], p < 0.05) had lower OS than non-DHL and non-DEL/non-DHL counterparts, respectively. COO by IHC or GEP was not associated with OS in R/R DLBCL while DHL and DEL were adverse prognostic markers in DLBCL at first relapse.
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Affiliation(s)
- Sanjal H. Desai
- Department of HematologyMayo ClinicRochesterMinnesotaUSA
- Division of Hematology, Oncology and TransplantationUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Raphael Mwangi
- Department of Quantitative Health SciencesMayo ClinicRochesterMinnesotaUSA
| | - Alexandra N. Smith
- Department of Quantitative Health SciencesMayo ClinicRochesterMinnesotaUSA
| | - Matthew J. Maurer
- Department of Quantitative Health SciencesMayo ClinicRochesterMinnesotaUSA
| | - Umar Farooq
- Department of Hematology, Oncology and Bone Marrow TransplantUniversity of Iowa Hospitals and ClinicsIowa CityIowaUSA
| | - Rebecca L. King
- Department of Laboratory Medicine and PathologyMayo ClinicRochesterMinnesotaUSA
| | - James R. Cerhan
- Department of Quantitative Health SciencesMayo ClinicRochesterMinnesotaUSA
| | - Andrew L. Feldman
- Department of Laboratory Medicine and PathologyMayo ClinicRochesterMinnesotaUSA
| | | | | | - Yucai Wang
- Department of HematologyMayo ClinicRochesterMinnesotaUSA
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4
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Eissman JM, Smith AN, Mukherjee S, Lee ML, Choi S, Scollard P, Trittschuh EH, Mez JB, Bush WS, Engelman CD, Lu Q, Fardo DW, Widaman KF, Buckley RF, Mormino EC, Kunkle BW, Naj AC, Clark LR, Gifford KA, Cuccaro ML, Cruchaga C, Pericak‐Vance MA, Farrer LA, Wang L, Schellenberg GD, Haines JL, Jefferson AL, Johnson SC, Kukull WA, Albert MS, Keene CD, Saykin AJ, Larson EB, Sperling RA, Mayeux R, Thompson PM, Martin ER, Bennett DA, Barnes LL, Schneider JA, Crane PK, Hohman TJ, Dumitrescu L. Sex‐specific genetic predictors of memory, executive function, and language performance. Alzheimers Dement 2022. [DOI: 10.1002/alz.067842] [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: 12/24/2022]
Affiliation(s)
- Jaclyn M. Eissman
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | - Alexandra N. Smith
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | | | | | | | | | | | - Jesse B. Mez
- Boston University School of Medicine Boston MA USA
| | - William S. Bush
- Cleveland Institute for Computational Biology, Case Western Reserve University Cleveland OH USA
| | | | - Qiongshi Lu
- University of Wisconsin School of Medicine and Public Health Madison WI USA
| | - David W. Fardo
- College of Public Health, University of Kentucky Lexington KY USA
- Sanders‐Brown Center on Aging, University of Kentucky Lexington KY USA
| | | | - Rachel F. Buckley
- Massachusetts General Hospital, Harvard Medical School Boston MA USA
- Melbourne School of Psychological Sciences, University of Melbourne Melbourne VIC Australia
- Center for Alzheimer’s Research and Treatment, Brigham and Women’s Hospital/Harvard Medical School Boston MA USA
| | | | - Brian W. Kunkle
- John P. Hussman Institute for Human Genomics, Miller School of Medicine Miami FL USA
| | - Adam C. Naj
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
- Penn Neurodegeneration Genomics Center, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
| | - Lindsay R. Clark
- University of Wisconsin School of Medicine and Public Health Madison WI USA
| | - Katherine A. Gifford
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | - Michael L. Cuccaro
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami Miami FL USA
| | | | - Margaret A. Pericak‐Vance
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami Miami FL USA
| | - Lindsay A. Farrer
- Boston University School of Medicine Boston MA USA
- Boston University School of Public Health Boston MA USA
| | - Li‐San Wang
- Penn Neurodegeneration Genomics Center, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
| | - Gerard D. Schellenberg
- Penn Neurodegeneration Genomics Center, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
| | - Jonathan L. Haines
- Cleveland Institute for Computational Biology, Case Western Reserve University Cleveland OH USA
| | - Angela L. Jefferson
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | | | | | - Marilyn S. Albert
- Department of Neurology, Johns Hopkins University School of Medicine Baltimore MD USA
| | | | - Andrew J. Saykin
- Indiana Alzheimer’s Disease Research Center, Indiana University School of Medicine Indianapolis IN USA
- Indiana University School of Medicine Indianapolis IN USA
| | - Eric B Larson
- University of Washington Seattle WA USA
- Kaiser Permanente Washington Health Research Institute Seattle WA USA
| | - Reisa A. Sperling
- Massachusetts General Hospital, Harvard Medical School Boston MA USA
- Center for Alzheimer’s Research and Treatment, Brigham and Women’s Hospital/Harvard Medical School Boston MA USA
| | - Richard Mayeux
- Columbia University New York NY USA
- The Taub Institute for Research on Alzheimer’s Disease and The Aging Brain, Columbia University New York NY USA
- The Institute for Genomic Medicine, Columbia University Medical Center and The New York Presbyterian Hospital New York NY USA
| | - Paul M Thompson
- Keck School of Medicine, University of Southern California Los Angeles CA USA
| | - Eden R Martin
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami Miami FL USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center Chicago IL USA
| | - Lisa L. Barnes
- Rush Alzheimer's Disease Center, Rush University Medical Center Chicago IL USA
| | - Julie A Schneider
- Rush Alzheimer's Disease Center, Rush University Medical Center Chicago IL USA
| | | | - Timothy J. Hohman
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | - Logan Dumitrescu
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
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5
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Phillips J, Dumitrescu L, Archer DB, Smith AN, Mukherjee S, Lee ML, Choi S, Scollard P, Trittschuh EH, Mez JB, Mahoney ER, Bush WS, Engelman CD, Lu Q, Fardo DW, Widaman KF, Buckley RF, Mormino EC, Harrison TM, Sanders E, Clark LR, Gifford KA, Vardarajan BN, Cuccaro ML, Pericak‐Vance MA, Farrer LA, Wang L, Schellenberg GD, Haines JL, Jefferson AL, Johnson SC, Kukull WA, Albert MS, Keene CD, Saykin AJ, Larson EB, Sperling RA, Mayeux R, Goate A, Neuner S, Renton AE, Marcora E, Fulton‐Howard B, Patel T, Bennett DA, Schneider JA, Crane PK, Hohman TJ. Longitudinal GWAS Identifies Novel Genetic Variants and Complex Traits Associated with Resilience to Alzheimer’s Disease. Alzheimers Dement 2022. [DOI: 10.1002/alz.067816] [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: 12/24/2022]
Affiliation(s)
- Jared Phillips
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | - Logan Dumitrescu
- Vanderbilt Memory and Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | - Derek B Archer
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | - Alexandra N. Smith
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | | | | | | | | | - Emily H. Trittschuh
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Puget Sound Health Care System Seattle WA USA
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine Seattle WA USA
| | - Jesse B. Mez
- Boston University School of Medicine Boston MA USA
| | - Emily R. Mahoney
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
| | - William S. Bush
- Cleveland Institute for Computational Biology, Case Western Reserve University Cleveland OH USA
| | - Corinne D Engelman
- University of Wisconsin School of Medicine and Public Health Madison WI USA
| | - Qiongshi Lu
- University of Wisconsin School of Medicine and Public Health Madison WI USA
| | - David W. Fardo
- College of Public Health, University of Kentucky Lexington KY USA
- Sanders‐Brown Center on Aging, University of Kentucky Lexington KY USA
| | | | - Rachel F. Buckley
- Center for Alzheimer’s Research and Treatment, Department of Neurology, Brigham and Women’s Hospital, Harvard Medical School Boston MA USA
- Melbourne School of Psychological Sciences, University of Melbourne Melbourne VIC Australia
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School Boston MA USA
| | - Elizabeth C. Mormino
- Department of Neurology and Neurological Sciences, Stanford University Stanford CA USA
| | | | | | - Lindsay R. Clark
- University of Wisconsin School of Medicine and Public Health Madison WI USA
| | - Katherine A. Gifford
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | - Badri N. Vardarajan
- Department of Neurology, Vagelos College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital New York NY USA
- The Taub Institute for Research on Alzheimer’s Disease and The Aging Brain, Columbia University New York NY USA
- The Institute for Genomic Medicine, Columbia University Medical Center and The New York Presbyterian Hospital New York NY USA
- Department of Neurology, Columbia University New York NY USA
| | - Michael L. Cuccaro
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine Miami FL USA
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami Miami FL USA
| | - Margaret A. Pericak‐Vance
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine Miami FL USA
| | - Lindsay A. Farrer
- Department of Neurology, Boston University School of Medicine Boston MA USA
- Department of Biostatistics, Boston University School of Public Health Boston MA USA
- Department of Medicine (Biomedical Genetics), Boston University School of Medicine Boston MA USA
| | - Li‐San Wang
- Penn Neurodegeneration Genomics Center, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
| | - Gerard D. Schellenberg
- Penn Neurodegeneration Genomics Center, Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania Philadelphia PA USA
| | - Jonathan L. Haines
- Cleveland Institute for Computational Biology, Case Western Reserve University Cleveland OH USA
| | - Angela L. Jefferson
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
| | | | | | - Marilyn S. Albert
- Department of Neurology, Division of Cognitive Neuroscience, John’s Hopkins University School of Medicine Baltimore MD USA
| | - C Dirk Keene
- Department of Laboratory Medicine and Pathology, University of Washington Seattle WA USA
| | - Andrew J. Saykin
- Department of Radiology and Imaging Services, Indiana University School of Medicine Indianapolis IN USA
| | - Eric B Larson
- University of Washington Seattle WA USA
- Kaiser Permanente Washington Health Research Institute Seattle WA USA
| | - Reisa A. Sperling
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School Boston MA USA
| | - Richard Mayeux
- The Taub Institute for Research on Alzheimer’s Disease and The Aging Brain, Columbia University New York NY USA
- The Institute for Genomic Medicine, Columbia University Medical Center and The New York Presbyterian Hospital New York NY USA
- Columbia University, Departments of Neurology, Psychiatry, and Epidemiology, Gertrude H. Sergievsky Center, The Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons New York NY USA
| | - Alison Goate
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Sarah Neuner
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Alan E. Renton
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Edoardo Marcora
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Brian Fulton‐Howard
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - Tulsi Patel
- Ronald M. Loeb Center for Alzheimer’s Disease, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai New York NY USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai New York NY USA
| | - David A Bennett
- Rush Alzheimer’s Disease Center, Rush University Medical Center Chicago IL USA
| | - Julie A Schneider
- Rush Alzheimer’s Disease Center, Rush University Medical Center Chicago IL USA
| | | | - Timothy J. Hohman
- Vanderbilt Memory & Alzheimer’s Center, Vanderbilt University Medical Center Nashville TN USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center Nashville TN USA
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6
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Higgins S, Smith AN, Williams ER, Das BM, Fedewa MV, Evans EM. Sex-specific correlates of metabolic syndrome risk in college-aged young adults. J Am Coll Health 2022; 70:2527-2534. [PMID: 33577409 DOI: 10.1080/07448481.2020.1869751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 08/05/2020] [Revised: 12/12/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Objective: To identify the sex-specific prevalence of metabolic syndrome (MetS) risk factors and their physiological, psychosocial, and behavioral correlates in a college-aged population. Participants and methods: Cross-sectional assessment of MetS risk factors and potential correlates occurred in 379 first-year students (aged 18.34 ± 0.49 years, 67.3% female). Multivariable linear regression assessed the relationships between potential correlates and continuous MetS risk scores, derived from principal component analysis. Results: MetS risk factors were present in 58.4% of females and 68.5% of males, with 2.4% and 3.2% having defined MetS. In females, percent body fat (β = 0.46, p < 0.001), stress (β = 0.12, p = 0.031), % kcal from sugar (β = 0.18, p = 0.001), and moderate-to-vigorous physical activity (β=-0.12, p = 0.036) were associated with risk score. Whereas, correlates in males included percent body fat (β = 0.54, p < 0.001), C-reactive protein (β = 0.15, p = 0.045), and AUDIT alcohol consumption score (β = 0.15, p = 0.033). Conclusion: The sex-specific prevalence of MetS risk factors and correlates suggest that primary prevention strategies on college campuses should also follow a sex-specific approach.
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Affiliation(s)
- Simon Higgins
- Department of Exercise Science, Elon University, Elon, NC, USA
| | | | - Ewan R Williams
- Department of Kinesiology, University of Georgia, Athens, GA, USA
| | - Bhibha M Das
- Department of Kinesiology, University of Georgia, Athens, GA, USA
- Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Michael V Fedewa
- Department of Kinesiology, University of Georgia, Athens, GA, USA
- Department of Kinesiology, University of Alabama, Tuscaloosa, AL, USA
| | - Ellen M Evans
- Department of Kinesiology, University of Georgia, Athens, GA, USA
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7
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Eissman JM, Dumitrescu L, Mahoney ER, Smith AN, Mukherjee S, Lee ML, Scollard P, Choi SE, Bush WS, Engelman CD, Lu Q, Fardo DW, Trittschuh EH, Mez J, Kaczorowski CC, Hernandez Saucedo H, Widaman KF, Buckley RF, Properzi MJ, Mormino EC, Yang HS, Harrison TM, Hedden T, Nho K, Andrews SJ, Tommet D, Hadad N, Sanders RE, Ruderfer DM, Gifford KA, Zhong X, Raghavan NS, Vardarajan BN, Pericak-Vance MA, Farrer LA, Wang LS, Cruchaga C, Schellenberg GD, Cox NJ, Haines JL, Keene CD, Saykin AJ, Larson EB, Sperling RA, Mayeux R, Cuccaro ML, Bennett DA, Schneider JA, Crane PK, Jefferson AL, Hohman TJ. Sex differences in the genetic architecture of cognitive resilience to Alzheimer's disease. Brain 2022; 145:2541-2554. [PMID: 35552371 PMCID: PMC9337804 DOI: 10.1093/brain/awac177] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/07/2022] [Accepted: 04/14/2022] [Indexed: 12/04/2022] Open
Abstract
Approximately 30% of elderly adults are cognitively unimpaired at time of death despite the presence of Alzheimer's disease neuropathology at autopsy. Studying individuals who are resilient to the cognitive consequences of Alzheimer's disease neuropathology may uncover novel therapeutic targets to treat Alzheimer's disease. It is well established that there are sex differences in response to Alzheimer's disease pathology, and growing evidence suggests that genetic factors may contribute to these differences. Taken together, we sought to elucidate sex-specific genetic drivers of resilience. We extended our recent large scale genomic analysis of resilience in which we harmonized cognitive data across four cohorts of cognitive ageing, in vivo amyloid PET across two cohorts, and autopsy measures of amyloid neuritic plaque burden across two cohorts. These data were leveraged to build robust, continuous resilience phenotypes. With these phenotypes, we performed sex-stratified [n (males) = 2093, n (females) = 2931] and sex-interaction [n (both sexes) = 5024] genome-wide association studies (GWAS), gene and pathway-based tests, and genetic correlation analyses to clarify the variants, genes and molecular pathways that relate to resilience in a sex-specific manner. Estimated among cognitively normal individuals of both sexes, resilience was 20-25% heritable, and when estimated in either sex among cognitively normal individuals, resilience was 15-44% heritable. In our GWAS, we identified a female-specific locus on chromosome 10 [rs827389, β (females) = 0.08, P (females) = 5.76 × 10-09, β (males) = -0.01, P(males) = 0.70, β (interaction) = 0.09, P (interaction) = 1.01 × 10-04] in which the minor allele was associated with higher resilience scores among females. This locus is located within chromatin loops that interact with promoters of genes involved in RNA processing, including GATA3. Finally, our genetic correlation analyses revealed shared genetic architecture between resilience phenotypes and other complex traits, including a female-specific association with frontotemporal dementia and male-specific associations with heart rate variability traits. We also observed opposing associations between sexes for multiple sclerosis, such that more resilient females had a lower genetic susceptibility to multiple sclerosis, and more resilient males had a higher genetic susceptibility to multiple sclerosis. Overall, we identified sex differences in the genetic architecture of resilience, identified a female-specific resilience locus and highlighted numerous sex-specific molecular pathways that may underly resilience to Alzheimer's disease pathology. This study illustrates the need to conduct sex-aware genomic analyses to identify novel targets that are unidentified in sex-agnostic models. Our findings support the theory that the most successful treatment for an individual with Alzheimer's disease may be personalized based on their biological sex and genetic context.
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Affiliation(s)
- Jaclyn M Eissman
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Logan Dumitrescu
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Emily R Mahoney
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Alexandra N Smith
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | | | - Michael L Lee
- Department of Medicine, University of Washington,
Seattle, WA, USA
| | - Phoebe Scollard
- Department of Medicine, University of Washington,
Seattle, WA, USA
| | - Seo Eun Choi
- Department of Medicine, University of Washington,
Seattle, WA, USA
| | - William S Bush
- Cleveland Institute for Computational Biology, Department of Population and
Quantitative Health Sciences, Case Western Reserve University,
Cleveland, OH, USA
| | - Corinne D Engelman
- Department of Population Health Sciences, School of Medicine and Public
Health, University of Wisconsin-Madison, Madison,
WI, USA
| | - Qiongshi Lu
- Department of Statistics, University of Wisconsin-Madison,
Madison, WI, USA
- Department of Biostatistics and Medical Informatics, University of
Wisconsin-Madison, Madison, WI, USA
| | - David W Fardo
- Department of Biostatistics, College of Public Health, University of
Kentucky, Lexington, KY, USA
- Sanders-Brown Center on Aging, University of Kentucky,
Lexington, KY, USA
| | - Emily H Trittschuh
- Department of Psychiatry and Behavioral Sciences, University of Washington
School of Medicine, Seattle, WA, USA
- VA Puget Sound Health Care System, GRECC, Seattle,
WA, USA
| | - Jesse Mez
- Department of Neurology, Boston University School of
Medicine, Boston, MA, USA
| | | | - Hector Hernandez Saucedo
- UC Davis Alzheimer's Disease Research Center, Department of Neurology,
University of California Davis Medical Center, Sacramento,
CA, USA
| | | | - Rachel F Buckley
- Department of Neurology, Massachusetts General Hospital/Harvard Medical
School, Boston, MA, USA
- Center for Alzheimer's Research and Treatment, Department of Neurology,
Brigham and Women’s Hospital/Harvard Medical School, Boston,
MA, USA
- Melbourne School of Psychological Sciences, University of
Melbourne, Melbourne, Australia
| | - Michael J Properzi
- Department of Neurology, Massachusetts General Hospital/Harvard Medical
School, Boston, MA, USA
| | - Elizabeth C Mormino
- Department of Neurology and Neurological Sciences, Stanford
University, Stanford, CA, USA
| | - Hyun Sik Yang
- Department of Neurology, Massachusetts General Hospital/Harvard Medical
School, Boston, MA, USA
- Center for Alzheimer's Research and Treatment, Department of Neurology,
Brigham and Women’s Hospital/Harvard Medical School, Boston,
MA, USA
| | - Theresa M Harrison
- Helen Wills Neuroscience Institute, University of California
Berkeley, Berkeley, CA, USA
| | - Trey Hedden
- Icahn School of Medicine at Mount Sinai, New York
City, NY, USA
| | - Kwangsik Nho
- Department of Radiology and Imaging Sciences, Indiana Alzheimer Disease
Center, Indiana University School of Medicine, Indianapolis,
IN, USA
- Center for Computational Biology and Bioinformatics, Indiana University
School of Medicine, Indianapolis, IN, USA
| | - Shea J Andrews
- Icahn School of Medicine at Mount Sinai, New York
City, NY, USA
| | - Douglas Tommet
- Department of Psychiatry and Human Behavior, Brown University School of
Medicine, Providence, RI, USA
| | | | | | - Douglas M Ruderfer
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Katherine A Gifford
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Xiaoyuan Zhong
- Department of Statistics, University of Wisconsin-Madison,
Madison, WI, USA
- Department of Biostatistics and Medical Informatics, University of
Wisconsin-Madison, Madison, WI, USA
| | - Neha S Raghavan
- Department of Neurology, Columbia University, New
York, NY, USA
- The Taub Institute for Research on Alzheimer's Disease and The Aging Brain,
Columbia University, New York, NY, USA
- The Institute for Genomic Medicine, Columbia University Medical Center and
The New York Presbyterian Hospital, New York, NY,
USA
| | - Badri N Vardarajan
- Department of Neurology, Columbia University, New
York, NY, USA
- The Taub Institute for Research on Alzheimer's Disease and The Aging Brain,
Columbia University, New York, NY, USA
- The Institute for Genomic Medicine, Columbia University Medical Center and
The New York Presbyterian Hospital, New York, NY,
USA
| | | | | | | | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, University of Miami School of
Medicine, Miami, FL, USA
| | - Lindsay A Farrer
- Department of Neurology, Boston University School of
Medicine, Boston, MA, USA
- Department of Biostatistics, Boston University School of Public
Health, Boston, MA, USA
- Department of Medicine (Biomedical Genetics), Boston University School of
Medicine, Boston, MA, USA
| | - Li San Wang
- Penn Neurodegeneration Genomics Center, Department of Pathology and
Laboratory Medicine, University of Pennsylvania Perelman School of
Medicine, Philadelphia, PA, USA
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University School of
Medicine, St. Louis, MO, USA
| | - Gerard D Schellenberg
- Penn Neurodegeneration Genomics Center, Department of Pathology and
Laboratory Medicine, University of Pennsylvania Perelman School of
Medicine, Philadelphia, PA, USA
| | - Nancy J Cox
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Jonathan L Haines
- Cleveland Institute for Computational Biology, Department of Population and
Quantitative Health Sciences, Case Western Reserve University,
Cleveland, OH, USA
| | - C Dirk Keene
- Department of Pathology, University of Washington,
Seattle, WA, USA
| | - Andrew J Saykin
- Department of Radiology and Imaging Sciences, Indiana University School of
Medicine, Indianapolis, IN, USA
| | - Eric B Larson
- Department of Medicine, University of Washington,
Seattle, WA, USA
- Kaiser Permanente Washington Health Research Institute,
Seattle, WA, USA
| | - Reisa A Sperling
- Department of Neurology, Massachusetts General Hospital/Harvard Medical
School, Boston, MA, USA
| | - Richard Mayeux
- Department of Neurology, Columbia University, New
York, NY, USA
- The Taub Institute for Research on Alzheimer's Disease and The Aging Brain,
Columbia University, New York, NY, USA
- The Institute for Genomic Medicine, Columbia University Medical Center and
The New York Presbyterian Hospital, New York, NY,
USA
| | - Michael L Cuccaro
- John P. Hussman Institute for Human Genomics, University of Miami School of
Medicine, Miami, FL, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical
Center, Chicago, IL, USA
| | - Julie A Schneider
- Rush Alzheimer's Disease Center, Rush University Medical
Center, Chicago, IL, USA
| | - Paul K Crane
- Department of Medicine, University of Washington,
Seattle, WA, USA
| | - Angela L Jefferson
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
| | - Timothy J Hohman
- Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical
Center, Nashville, TN, USA
- Vanderbilt Genetics Institute, Vanderbilt University Medical
Center, Nashville, TN, USA
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8
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Smith AN, Higgins LQ, Higgins S. Behavior Change Trajectories and Metabolic Syndrome Risk Factor Clustering During the Transition to College: A Feasibility Pilot Study. Int J Exerc Sci 2022; 15:125-141. [PMID: 36896451 PMCID: PMC9987443] [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] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Metabolic syndrome (MetS) is typically diagnosed in adults; however, MetS risk factors are growing in prevalence during youth and young adulthood. Though the transition from high school to college is associated with adverse changes in lifestyle behaviors that may contribute to MetS risk factor development, the relationship between pre-college MetS risk status and transition-related behavior change is unknown. This prospective study aimed to describe the relationship between pre-college MetS risk status and transition-related behavior change trajectories in college-bound students. Moreover, it aimed to assess the feasibility of the study design, including acceptability to both participants and investigators, prior to implementation in a larger sample. Participants (n = 21, 18.3 ± 0.3 y/o) were assessed for MetS risk factors during their last semester of high school. Self-report behavioral data on dietary habits, physical activity, sleep, stress, and alcohol consumption were collected at baseline and during the fall and spring semesters of the first year of college. Linear mixed models revealed drastic increases in alcohol consumption (β11 = 0.39, p < 0.001) and apparent decreases in moderate-vigorous physical activity (β11 = -0.15, p = 0.185) during the college transition. Furthermore, 47.6% of students had ≥ 1 MetS risk factor at baseline and those with a greater number of risk factors experienced a more severe alcohol-related behavior change trajectory (β11 = 0.29, p < 0.050). These findings highlight the importance of primordial prevention strategies against early MetS risk development, given the potential relationship with future behavioral trajectories. Future research should aim to further characterize this relationship using comprehensive, longitudinal measures that span the college transition in larger, more diverse samples.
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Affiliation(s)
| | - Lauren Q Higgins
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Simon Higgins
- Department of Exercise Science, Elon University, Elon, NC, USA
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9
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Ouellette AR, Neuner SM, Dumitrescu L, Anderson LC, Gatti DM, Mahoney ER, Bubier JA, Churchill G, Peters L, Huentelman MJ, Herskowitz JH, Yang HS, Smith AN, Reitz C, Kunkle BW, White CC, De Jager PL, Schneider JA, Bennett DA, Seyfried NT, Chesler EJ, Hadad N, Hohman TJ, Kaczorowski CC. Cross-Species Analyses Identify Dlgap2 as a Regulator of Age-Related Cognitive Decline and Alzheimer's Dementia. Cell Rep 2020; 32:108091. [PMID: 32877673 PMCID: PMC7502175 DOI: 10.1016/j.celrep.2020.108091] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 02/10/2020] [Accepted: 08/07/2020] [Indexed: 11/27/2022] Open
Abstract
Genetic mechanisms underlying age-related cognitive decline and dementia remain poorly understood. Here, we take advantage of the Diversity Outbred mouse population to utilize quantitative trait loci mapping and identify Dlgap2 as a positional candidate responsible for modifying working memory decline. To evaluate the translational relevance of this finding, we utilize longitudinal cognitive measures from human patients, RNA expression from post-mortem brain tissue, data from a genome-wide association study (GWAS) of Alzheimer's dementia (AD), and GWAS results in African Americans. We find an association between Dlgap2 and AD phenotypes at the variant, gene and protein expression, and methylation levels. Lower cortical DLGAP2 expression is observed in AD and is associated with more plaques and tangles at autopsy and faster cognitive decline. Results will inform future studies aimed at investigating the cross-species role of Dlgap2 in regulating cognitive decline and highlight the benefit of using genetically diverse mice to prioritize novel candidates.
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Affiliation(s)
- Andrew R Ouellette
- The Jackson Laboratory, Bar Harbor, ME 04609, USA; Graduate School of Biomedical Science and Engineering, The University of Maine, Orono, ME 04469, USA
| | - Sarah M Neuner
- The Jackson Laboratory, Bar Harbor, ME 04609, USA; University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Logan Dumitrescu
- Vanderbilt Memory and Alzheimer's Center, Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37240, USA; Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37240, USA
| | | | | | - Emily R Mahoney
- Vanderbilt Memory and Alzheimer's Center, Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37240, USA
| | | | | | | | - Matthew J Huentelman
- Neurogenomics Division, Translational Genomics Research Institute, Phoenix, AZ 85004, USA
| | - Jeremy H Herskowitz
- Center for Neurodegeneration and Experimental Therapeutics and Department of Neurology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Hyun-Sik Yang
- Cell Circuits and Epigenomics Program, Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, MA 02142, USA; Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Center for Alzheimer Research and Treatment, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Alexandra N Smith
- Vanderbilt Memory and Alzheimer's Center, Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37240, USA
| | - Christiane Reitz
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Gertrude H. Sergievsky Center, and Departments of Neurology and Epidemiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Brian W Kunkle
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Charles C White
- Cell Circuits and Epigenomics Program, Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, MA 02142, USA; Center for Translational and Computational Neuroimmunology, Department of Neurology, Columbia University Medical Center, New York, NY 10032, USA
| | - Philip L De Jager
- Cell Circuits and Epigenomics Program, Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, MA 02142, USA; Center for Translational and Computational Neuroimmunology, Department of Neurology, Columbia University Medical Center, New York, NY 10032, USA
| | - Julie A Schneider
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL 60612, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL 60612, USA
| | - Nicholas T Seyfried
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Niran Hadad
- The Jackson Laboratory, Bar Harbor, ME 04609, USA.
| | - Timothy J Hohman
- Vanderbilt Memory and Alzheimer's Center, Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37240, USA; Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37240, USA.
| | - Catherine C Kaczorowski
- The Jackson Laboratory, Bar Harbor, ME 04609, USA; Graduate School of Biomedical Science and Engineering, The University of Maine, Orono, ME 04469, USA.
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Smith AN, Williams ER, Das BM, Fedewa MV, Evans EM, Higgins S. Sex-specific Correlates Of Metabolic Syndrome Risk In College Students. Med Sci Sports Exerc 2020. [DOI: 10.1249/01.mss.0000685968.11527.4e] [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: 11/21/2022]
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11
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Kabelik D, Weitekamp CA, Choudhury SC, Hartline JT, Smith AN, Hofmann HA. Neural activity in the social decision-making network of the brown anole during reproductive and agonistic encounters. Horm Behav 2018; 106:178-188. [PMID: 30342012 DOI: 10.1016/j.yhbeh.2018.06.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 07/28/2017] [Revised: 06/21/2018] [Accepted: 06/28/2018] [Indexed: 12/14/2022]
Abstract
Animals have evolved flexible strategies that allow them to evaluate and respond to their social environment by integrating the salience of external stimuli with internal physiological cues into adaptive behavioral responses. A highly conserved social decision-making network (SDMN), consisting of interconnected social behavior and mesolimbic reward networks, has been proposed to underlie such adaptive behaviors across all vertebrates, although our understanding of this system in reptiles is very limited. Here we measure neural activation across the SDMN and associated regions in the male brown anole (Anolis sagrei), within both reproductive and agonistic contexts, by quantifying the expression density of the immediate early gene product Fos. We then relate this neural activity measure to social context, behavioral expression, and activation (as measured by colocalization with Fos) of different phenotypes of 'source' node neurons that produce neurotransmitters and neuropeptides known to modulate SDMN 'target' node activity. Our results demonstrate that measures of neural activation across the SDMN network are generally independent of specific behavioral output, although Fos induction in a few select nodes of the social behavior network component of the SDMN does vary with social environment and behavioral output. Under control conditions, the mesolimbic reward nodes of the SDMN actually correlate little with the social behavior nodes, but the interconnectivity of these SDMN components increases dramatically within a reproductive context. When relating behavioral output to specific source node activation profiles, we found that catecholaminergic activation is associated with the frequency and intensity of reproductive behavior output, as well as with aggression intensity. Finally, in terms of the effects of source node activation on SDMN activity, we found that Ile8-oxytocin (mesotocin) populations correlate positively, while Ile3-vasopressin (vasotocin), catecholamine, and serotonin populations correlate negatively with SDMN activity. Taken together, our findings present evidence for a highly dynamic SDMN in reptiles that is responsive to salient cues in a social context-dependent manner.
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Affiliation(s)
- David Kabelik
- Department of Biology, Rhodes College, Memphis, TN 38112, USA; Program in Neuroscience, Rhodes College, Memphis, TN 38112, USA.
| | - Chelsea A Weitekamp
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Shelley C Choudhury
- Department of Biology, Rhodes College, Memphis, TN 38112, USA; Program in Neuroscience, Rhodes College, Memphis, TN 38112, USA
| | - Jacob T Hartline
- Department of Biology, Rhodes College, Memphis, TN 38112, USA; Program in Neuroscience, Rhodes College, Memphis, TN 38112, USA
| | - Alexandra N Smith
- Department of Biology, Rhodes College, Memphis, TN 38112, USA; Program in Neuroscience, Rhodes College, Memphis, TN 38112, USA
| | - Hans A Hofmann
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA; Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA; Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA.
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12
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Borniger JC, Walker Ii WH, Surbhi, Emmer KM, Zhang N, Zalenski AA, Muscarella SL, Fitzgerald JA, Smith AN, Braam CJ, TinKai T, Magalang UJ, Lustberg MB, Nelson RJ, DeVries AC. A Role for Hypocretin/Orexin in Metabolic and Sleep Abnormalities in a Mouse Model of Non-metastatic Breast Cancer. Cell Metab 2018; 28:118-129.e5. [PMID: 29805100 PMCID: PMC6031468 DOI: 10.1016/j.cmet.2018.04.021] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [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: 08/03/2017] [Revised: 01/08/2018] [Accepted: 04/29/2018] [Indexed: 12/21/2022]
Abstract
We investigated relationships among immune, metabolic, and sleep abnormalities in mice with non-metastatic mammary cancer. Tumor-bearing mice displayed interleukin-6 (IL-6)-mediated peripheral inflammation, coincident with altered hepatic glucose processing and sleep. Tumor-bearing mice were hyperphagic, had reduced serum leptin concentrations, and enhanced sensitivity to exogenous ghrelin. We tested whether these phenotypes were driven by inflammation using neutralizing monoclonal antibodies against IL-6; despite the reduction in IL-6 signaling, metabolic and sleep abnormalities persisted. We next investigated neural populations coupling metabolism and sleep, and observed altered activity within lateral-hypothalamic hypocretin/orexin (HO) neurons. We used a dual HO-receptor antagonist to test whether increased HO signaling was causing metabolic abnormalities. This approach rescued metabolic abnormalities and enhanced sleep quality in tumor-bearing mice. Peripheral sympathetic denervation prevented tumor-induced increases in serum glucose. Our results link metabolic and sleep abnormalities via the HO system, and provide evidence that central neuromodulators contribute to tumor-induced changes in metabolism.
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Affiliation(s)
- Jeremy C Borniger
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - William H Walker Ii
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Surbhi
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Kathryn M Emmer
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Department of Veterinary Preventative Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Ning Zhang
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Abigail A Zalenski
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Stevie L Muscarella
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Julie A Fitzgerald
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Alexandra N Smith
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Cornelius J Braam
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Tial TinKai
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Ulysses J Magalang
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Maryam B Lustberg
- Comprehensive Cancer Center, Division of Medical Oncology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Randy J Nelson
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - A Courtney DeVries
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Behavioral Neuroendocrinology Group, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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Hartline JT, Smith AN, Kabelik D. Serotonergic activation during courtship and aggression in the brown anole, Anolis sagrei. PeerJ 2017; 5:e3331. [PMID: 28533977 PMCID: PMC5436558 DOI: 10.7717/peerj.3331] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 04/19/2017] [Indexed: 11/20/2022] Open
Abstract
The role of serotonin (5-hydroxytryptamine, 5-HT) in social behavior regulation is not fully understood. While 5-HT release in nuclei of the social behavior network has generally been associated with inhibition of aggressive behavior across multiple classes of vertebrates, less is known about its effects on sexual, especially non-copulatory courtship display behaviors. Furthermore, most research has examined effects at 5-HT release sites, while studies examining the behavioral relevance of source cell populations have generated contradictory findings. This study utilized immunohistochemistry to examine the colocalization of 5-HT with Fos, an immediate early gene product and marker of neural activity, in the raphe and superior reticular nuclei of male brown anoles (Anolis sagrei) exposed to either aggression, courtship, or control social interactions. Supporting previous research, copulation was associated with a decrease in 5-HT activity, while a novel link between 5-HT activity and latency to non-copulatory courtship was also found. Within the aggression group, intensity and frequency of behavior were both associated with decreased 5-HT activity. An effect of social context was also seen, with anoles exposed to either courtship or aggression encounters showing decreased 5-HT activity in certain raphe and superior reticular nuclei populations compared to controls. Interestingly, context effects and behavioral effects were seen at separate brain nuclei, suggesting the presence of separate systems with distinct functional roles.
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Affiliation(s)
- Jacob T Hartline
- Department of Biology, Rhodes College, Memphis, TN, United States of America.,Program in Neuroscience, Rhodes College, Memphis, TN, United States of America
| | - Alexandra N Smith
- Department of Biology, Rhodes College, Memphis, TN, United States of America.,Program in Neuroscience, Rhodes College, Memphis, TN, United States of America
| | - David Kabelik
- Department of Biology, Rhodes College, Memphis, TN, United States of America.,Program in Neuroscience, Rhodes College, Memphis, TN, United States of America
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14
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Smith AN, Kabelik D. The effects of dopamine receptor 1 and 2 agonists and antagonists on sexual and aggressive behaviors in male green anoles. PLoS One 2017; 12:e0172041. [PMID: 28187160 PMCID: PMC5302375 DOI: 10.1371/journal.pone.0172041] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 01/30/2017] [Indexed: 11/29/2022] Open
Abstract
The propensity to exhibit social behaviors during interactions with same-sex and opposite-sex conspecifics is modulated by various neurotransmitters, including dopamine. Dopamine is a conserved neurotransmitter among vertebrates and dopaminergic receptors are also highly conserved among taxa. Activation of D1 and D2 dopamine receptor subtypes has been shown to modulate social behaviors, especially in mammalian and avian studies. However, the specific behavioral functions of these receptors vary across taxa. In reptiles there have been few studies examining the relationship between dopaminergic receptors and social behaviors. We therefore examined the effects of D1 and D2 agonists and antagonists on sexual and aggressive behaviors in the male green anole lizard (Anolis carolinensis). Treatment with high doses of both D1 and D2 agonists was found to impair both sexual and aggressive behaviors. However, the D1 agonist treatment was also found to impair motor function, suggesting that those effects were likely nonspecific. Lower doses of both agonists and antagonists failed to affect social behaviors. These findings provide some evidence for D2 receptor regulation of social behaviors, but in contrast with previous research, these effects are all inhibitory and no effects were found for manipulations of D1 receptors. A potential reason for the lack of more widespread effects on social behaviors using moderate or low drug doses is that systemic injection of drugs resulted in effects throughout the whole brain, thus affecting counteracting circuits which negated one another, making measurable changes in behavioral output difficult to detect. Future studies should administer drugs directly into brain regions known to regulate sexual and aggressive behaviors.
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Affiliation(s)
- Alexandra N. Smith
- Department of Biology, Rhodes College, Memphis, Tennessee, United States of America
- Program in Neuroscience, Rhodes College, Memphis, Tennessee, United States of America
| | - David Kabelik
- Department of Biology, Rhodes College, Memphis, Tennessee, United States of America
- Program in Neuroscience, Rhodes College, Memphis, Tennessee, United States of America
- * E-mail:
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15
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Affiliation(s)
- A N Smith
- Department of Clinical Surgery, University of Edinburgh and Gastrointestinal Unit, Western General Hospital, Edinburgh, EH4 2XU
| | - W O Kirwan
- Department of Clinical Surgery, University of Edinburgh and Gastrointestinal Unit, Western General Hospital, Edinburgh, EH4 2XU
| | - S Shariff
- Department of Clinical Surgery, University of Edinburgh and Gastrointestinal Unit, Western General Hospital, Edinburgh, EH4 2XU
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16
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Playford MC, Dawson K, Playford SE, Smith AN, Page SW, Collins K, Forsberg N. Effect of an immunomodulatory feed additive on markers of immunity in pasture-fed dairy cows. Aust Vet J 2015; 92:479-81. [PMID: 25424760 DOI: 10.1111/avj.12269] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND Infectious diseases in dairy cows often follow a time of nutritional or physiological stress and the subsequent altered immune system function. This study aimed to determine if the immunomodulatory effects of a feed additive previously observed in experimental animals and housed cattle fed total mixed rations could be reproduced in pasture-fed dairy cattle under Australian conditions. METHODS The study included 34 pasture-fed dairy cattle given the treatment (n = 17) or placebo (bentonite, n = 17) for an acclimation period of 15 days followed by 60 days of supplementation. Blood tests were taken pre-trial and then 30, 60 and 90 days after acclimation. Blood samples were extracted and preserved in Trizol and analysed for immune markers. RESULTS Pasture-fed dairy cows in the treatment group had significantly higher levels of the immune markers interleukin-8R and L-selectin in comparison with placebo-fed cows at 60 days after the start of supplementation. CONCLUSION The immunomodulatory effects of the additive observed in the current study and the associated enhanced neutrophil function demonstrated by other studies suggest a role in decreasing the rates of mastitis and other infectious diseases of dairy cattle, particularly during times of nutritional or physiological stress.
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Affiliation(s)
- M C Playford
- Dawbuts Pty Ltd, PO Box 1118, Camden, New South Wales, 2570, Australia.
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17
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Playford MC, Smith AN, Love S, Besier RB, Kluver P, Bailey JN. Prevalence and severity of anthelmintic resistance in ovine gastrointestinal nematodes in Australia (2009-2012). Aust Vet J 2015; 92:464-71. [PMID: 25424758 DOI: 10.1111/avj.12271] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/05/2014] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study aimed to provide an indication of the prevalence and severity of anthelmintic resistance (AR) in the Australian sheep industry by compiling the results of faecal worm egg count reduction tests (FECRTs). METHODS Government and private parasitology laboratories, pharmaceutical companies and veterinarians known to have conducted FECRTs were asked to provide results that conformed to Australian and New Zealand standard diagnostic procedures. RESULTS Data were available from a total of 390 tests, with larval differentiation conducted in 222 cases. Pooled results from all states for the macrocyclic lactone (ML) class showed a lower prevalence of AR against combined species for moxidectin (54%) compared with abamectin (77%) and ivermectin (87%). Analysis by state revealed higher levels of ML-resistant Teladorsagia sp. in Tasmania and Western Australia than in other states and ML-resistant Haemonchus sp. was more frequently detected in New South Wales. CONCLUSION This compilation of results of FECRTs conducted by Australian parasitology laboratories in 2009-12 showed widespread AR of the common sheep nematodes (Teladorsagia, Trichostrongylus and Haemonchus) to all broad-spectrum anthelmintics, with the exception of monepantel, whether used singly or in combination.
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18
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Collette SA, Allstadt SD, Chon EM, Vernau W, Smith AN, Garrett LD, Choy K, Rebhun RB, Rodriguez CO, Skorupski KA. Treatment of feline intermediate- to high-grade lymphoma with a modified university of Wisconsin-Madison protocol: 119 cases (2004-2012). Vet Comp Oncol 2015; 14 Suppl 1:136-46. [PMID: 26109275 DOI: 10.1111/vco.12158] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [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: 12/05/2014] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 12/31/2022]
Abstract
CHOP-based (cyclophosphamide, doxorubicin, vinca alkaloid, prednisolone) chemotherapy protocols are often recommended for treatment of feline lymphoma. While maintenance-free CHOP-based protocols have been published and readily used in dogs, there is limited literature regarding similar maintenance-free protocols in cats. The purpose of this study was to describe the outcome of cats with intermediate- to high-grade lymphoma that were prescribed a modified 25-week University of Wisconsin-Madison (UW-25) chemotherapy protocol. A secondary objective was examination of potential prognostic factors. One hundred and nineteen cats from five institutions treated with a UW-25-based protocol were included. The Kaplan-Meier median progression-free interval (PFI) and survival time (MST) were 56 and 97 (range 2-2019) days, respectively. Cats assessed as having a complete response (CR) to therapy had significantly longer PFI and MST than those with partial or no response (PFI 205 versus 54 versus 21 days, respectively, P < 0.0001 and MST 318 versus 85 versus 27 days, respectively, P < 0.0001).
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Affiliation(s)
- S A Collette
- Veterinary Medical Teaching Hospital, University of California-Davis, Davis, CA, USA.,Oncology Service, Upstate Veterinary Specialists, Greenville, SC, USA
| | - S D Allstadt
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA.,Oncology Service, Blue Pearl Veterinary Partners, Louisville, KY, USA
| | - E M Chon
- Department of Medical Sciences, Univeristy of Wisconsin-Madison, Madison, WI, USA
| | - W Vernau
- Department of Pathology, Microbiology and Immunology, University of California-Davis, CA, USA
| | - A N Smith
- Department of Clinical Sciences, Auburn University, Auburn, AL, USA
| | - L D Garrett
- Department of Veterinary Clinical Medicine, University of Illinois, Urbana, IL, USA
| | - K Choy
- Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA, USA.,Oncology Service, Seattle Veterinary Specialists, Seattle, WA, USA
| | - R B Rebhun
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
| | - C O Rodriguez
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
| | - K A Skorupski
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
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19
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Back AR, Schleis SE, Smrkovski OA, Lee J, Smith AN, Phillips JC. Mechlorethamine, vincristine, melphalan and prednisone (MOMP) for the treatment of relapsed lymphoma in dogs. Vet Comp Oncol 2013; 13:398-408. [PMID: 23910023 DOI: 10.1111/vco.12055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/18/2013] [Accepted: 06/18/2013] [Indexed: 12/20/2022]
Abstract
Eighty-eight dogs with relapsed lymphoma were treated with the MOMP (mechlorethamine, vincristine, melphalan and prednisone) protocol on a 28-day treatment cycle. The overall response rate (ORR) to the MOMP protocol was 51.1% for a median of 56 days (range 7-858 days). Twelve percent of dogs experienced a complete response for a median of 81 days (range 42-274 days) and 38.6% experienced a partial response for a median of 49 days (range 7-858 days). Dogs with T-cell lymphoma had an ORR of 55% for a median of 60 days (range 49-858 days) while those with B-cell lymphoma had an ORR of 57% for a median of 81 days (range 7-274 days) (P = 0.783). The overall survival time for all dogs was 183 days (range 17-974 days). Fifty-four percent of dogs experienced toxicity with the majority classified as grade I. The MOMP protocol seems well-tolerated and is an option for dogs with relapsed lymphoma.
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Affiliation(s)
- A R Back
- Comparative Oncology Program, Department of Clinical Sciences, Auburn University, College of Veterinary Medicine, Auburn, AL, USA
| | - S E Schleis
- Comparative Oncology Program, Department of Clinical Sciences, Auburn University, College of Veterinary Medicine, Auburn, AL, USA
| | - O A Smrkovski
- Comparative Oncology Program, Department of Small Animal Medicine, University of Tennessee, College of Veterinary Medicine, Knoxville, TN, USA
| | - J Lee
- Comparative Oncology Program, Department of Small Animal Medicine, University of Tennessee, College of Veterinary Medicine, Knoxville, TN, USA
| | - A N Smith
- Comparative Oncology Program, Department of Clinical Sciences, Auburn University, College of Veterinary Medicine, Auburn, AL, USA
| | - J C Phillips
- Animal Emergency Critical Care and Referral Center, Knoxville, TN, USA
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20
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Abstract
An intact, 8-year-old, male Golden Retriever dog was presented for evaluation of a nasal mass and approximately 30 firm, raised, variably ulcerated dermal and subcutaneous masses. Histopathology of both nasal and multiple skin masses revealed multiple nonencapsulated, infiltrative masses comprising clusters, anastomosing trabeculae, and packets of neoplastic, round to ovoid, hyperchromatic cells with marked nuclear molding. Surrounding the neoplastic cells was a marked stromal response in which many of the spindle-shaped cells expressed muscle-specific actin and had ultrastructural features consistent with myofibroblasts. A literature search indicates that this is the first report in a peer-reviewed journal of cutaneous metastasis of a nasal neuroendocrine tumor in any domestic animal species.
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Affiliation(s)
- J W Koehler
- Auburn University College of Veterinary Medicine, Department of Pathobiology, Auburn, Alabama, USA.
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21
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Joiner KS, Smith AN, Henderson RA, Brawner WR, Spangler EA, Sartin EA. Multicentric cutaneous neuroendocrine (Merkel cell) carcinoma in a dog. Vet Pathol 2010; 47:1090-4. [PMID: 20634406 DOI: 10.1177/0300985810375945] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Multicentric cutaneous neuroendocrine (Merkel cell) carcinoma was diagnosed in a 5-year-old castrated male Keeshond dog with multiple firm nodular cutaneous masses. The neoplastic tissue locally effaced the periadnexal and deep dermis and consisted of densely cellular confluent clusters of round to polygonal cells supported by a delicate fibrovascular stroma. The cells were moderately immunoreactive with chromogranin A, synaptophysin, and cytokeratin. Ultrastructurally, the cells had characteristic membrane-bound dense-core neuroendocrine granules approximately 120 nm in diameter and randomly dispersed throughout the cytoplasm. Effacement of dermal structures and multicentric distribution suggested low-grade malignant phenotype. These findings contrast with the typical benign behavior of canine cutaneous neuroendocrine tumors.
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Affiliation(s)
- K S Joiner
- Department of Pathobiology, 166 Greene Hall, College of Veterinary Medicine, Auburn University, Auburn, AL 36849-5519, USA.
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22
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O'Brien PM, Davies MJ, Scurry JP, Smith AN, Barton CA, Henderson MJ, Saunders DN, Gloss BS, Patterson KI, Clancy JL, Heinzelmann-Schwarz VA, Murali R, Scolyer RA, Zeng Y, Williams ED, Scurr L, DeFazio A, Quinn D, Watts CKW, Hacker NF, Henshall SM, Sutherland RL. Erratum: The E3 ubiquitin ligase EDD is an adverse prognostic factor for serous epithelial ovarian cancer and modulates cisplatin resistance in vitro. Br J Cancer 2008. [PMCID: PMC2410105 DOI: 10.1038/sj.bjc.6604419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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23
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O'Brien PM, Davies MJ, Scurry JP, Smith AN, Barton CA, Henderson MJ, Saunders DN, Gloss BS, Patterson KI, Clancy JL, Heinzelmann-Schwarz VA, Murali R, Scolyer RA, Zeng Y, Williams ED, Scurr L, Defazio A, Quinn DI, Watts CKW, Hacker NF, Henshall SM, Sutherland RL. The E3 ubiquitin ligase EDD is an adverse prognostic factor for serous epithelial ovarian cancer and modulates cisplatin resistance in vitro. Br J Cancer 2008; 98:1085-93. [PMID: 18349819 PMCID: PMC2275489 DOI: 10.1038/sj.bjc.6604281] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Despite a high initial response rate to first-line platinum/paclitaxel chemotherapy, most women with epithelial ovarian cancer relapse with recurrent disease that becomes refractory to further cytotoxic treatment. We have previously shown that the E3 ubiquitin ligase, EDD, a regulator of DNA damage responses, is amplified and overexpressed in serous ovarian carcinoma. Given that DNA damage pathways are linked to platinum resistance, the aim of this study was to determine if EDD expression was associated with disease recurrence and platinum sensitivity in serous ovarian cancer. High nuclear EDD expression, as determined by immunohistochemistry in a cohort of 151 women with serous ovarian carcinoma, was associated with an approximately two-fold increased risk of disease recurrence and death in patients who initially responded to first-line chemotherapy, independently of disease stage and suboptimal debulking. Although EDD expression was not directly correlated with relative cisplatin sensitivity of ovarian cancer cell lines, sensitivity to cisplatin was partially restored in platinum-resistant A2780-cp70 ovarian cancer cells following siRNA-mediated knockdown of EDD expression. These results identify EDD as a new independent prognostic marker for outcome in serous ovarian cancer, and suggest that pathways involving EDD, including DNA damage responses, may represent new therapeutic targets for chemoresistant ovarian cancer.
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Affiliation(s)
- P M O'Brien
- Garvan Institute of Medical Research, Darlinghurst, Sydney, New South Wales 2010, Australia .
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24
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Heinzelmann-Schwarz VA, Gardiner-Garden M, Henshall SM, Scurry JP, Scolyer RA, Smith AN, Bali A, Bergh PV, Baron-Hay S, Scott C, Fink D, Hacker NF, Sutherland RL, O'Brien PM. A distinct molecular profile associated with mucinous epithelial ovarian cancer. Br J Cancer 2006; 94:904-13. [PMID: 16508639 PMCID: PMC2361366 DOI: 10.1038/sj.bjc.6603003] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mucinous epithelial ovarian cancers (MOC) are clinically and morphologically distinct from the other histological subtypes of ovarian cancer. To determine the genetic basis of MOC and to identify potential tumour markers, gene expression profiling of 49 primary ovarian cancers of different histological subtypes was performed using a customised oligonucleotide microarray containing >59 000 probesets. The results show that MOC express a genetic profile that both differs and overlaps with other subtypes of epithelial ovarian cancer. Concordant with its histological phenotype, MOC express genes characteristic of mucinous carcinomas of varying epithelial origin, including intestinal carcinomas. Differences in gene expression between MOC and other histological subtypes of ovarian cancer were confirmed by RT–PCR and/or immunohistochemistry. In particular, galectin 4 (LGALS4) was highly and specifically expressed in MOC, but expressed at lower levels in benign mucinous cysts and borderline (atypical proliferative) tumours, supporting a malignant progression model of MOC. Hence LGALS4 may have application as an early and differential diagnostic marker of MOC.
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Affiliation(s)
- V A Heinzelmann-Schwarz
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
- Division of Gynecology, University Hospital Zurich, Switzerland
| | - M Gardiner-Garden
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - S M Henshall
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - J P Scurry
- South Eastern Area Laboratory Service, Prince of Wales Hospital, Randwick, NSW 2031, Australia
| | - R A Scolyer
- Department of Anatomical Pathology, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia
| | - A N Smith
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - A Bali
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - P Vanden Bergh
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - S Baron-Hay
- Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW 2065, Australia
| | - C Scott
- Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW 2065, Australia
| | - D Fink
- Division of Gynecology, University Hospital Zurich, Switzerland
| | - N F Hacker
- Gynaecological Cancer Centre, Royal Hospital for Women, Randwick, NSW 2031, Australia
| | - R L Sutherland
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - P M O'Brien
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia.
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25
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Smith AN. An illustrated guide to gastrointestinal motility. D. Kumar, S. Gustavsson. 255 × 195mm. Pp. 470. Illustrated. 1988. Chichester: John Wiley and Sons. £65.00. Br J Surg 2005. [DOI: 10.1002/bjs.1800761251] [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: 11/10/2022]
Affiliation(s)
- A N Smith
- Western General Hospital, Edinburgh EH4 2XU, UK
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26
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Abstract
Infection with HIV may develop to AIDS at different rates in different individuals, with a spectrum varying from rapid progression to long-term non-progression. The variable course of HIV-1 infection causes emotional trauma for the infected person and complicates the design and interpretation of therapeutic trials because of unrecognized differences in prognosis. Owing to the variable clinical expression of HIV infection, the use of non-clinical disease markers has become important to patient management. Thus, it is essential to have tests which can accurately assess the stage of infection in an individual, as well as predict its course and monitor its progression. These laboratory tests are valuable during the period of clinical latency and subsequently supplement various clinical parameters.
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Affiliation(s)
- P Kiepiela
- Nelson R Mandela School of Medicine, University of Kwazulu-Natal, HIV Pathogenesis Programme, DDMRI, 719 Umbilo Road, Congella, Durban, 4013 Natal, South Africa.
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27
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Abstract
In recent years, several inhibitors that prevent caspase activation and apoptosis have emerged. At high doses, however, these inhibitors can have nonspecific effects and/or become cytotoxic. In this study, we determined the effectiveness of broad spectrum caspase inhibitors to prevent apoptosis. A carboxy terminal phenoxy group conjugated to the amino acids valine and aspartate (Q-VD-OPh) potently inhibited apoptosis. Q-VD-OPh was significantly more effective in preventing apoptosis than the widely used inhibitors, ZVAD-fmk and Boc-D-fmk, and was also equally effective in preventing apoptosis mediated by the three major apoptotic pathways, caspase 9/3, caspase 8/10, and caspase 12. In addition to the increased effectiveness, Q-VD-OPh was not toxic to cells even at extremely high concentrations. Our data indicate that the specificity, effectiveness, and reduced toxicity of caspase inhibitors can be significantly enhanced using carboxyterminal o-phenoxy groups and may have important uses in vivo.
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Affiliation(s)
- T M Caserta
- Department of Physiology and Biophysics, Wright State University School of Medicine, Dayton, Ohio 45435, USA
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28
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Cohen M, Sartin EA, Whitley EM, Whitley RD, Smith AN, Brawner WR, Henderson R, Behrend EN. Ocular metastasis of a vaccine-associated fibrosarcoma in a cat. Vet Comp Oncol 2003; 1:232-40. [PMID: 19379185 DOI: 10.1111/j.1476-5810.2003.00031.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A 6-year-old, neutered male domestic shorthair cat was evaluated for a recurrent vaccine-associated fibrosarcoma. The cat had three excisions of the tumour prior to presentation and was referred for radiation therapy. Ten months following treatment with radiation therapy, the cat was presented again for a cloudy appearance to the eye. An exenteration was performed, and biopsy revealed fibrosarcoma. At the same time, two discrete pulmonary nodules were identified on thoracic radiographs. Two doses of doxorubicin (20 mg/m(2)) and cyclophosphamide (100 mg/m(2)) were administered intravenously 3 weeks apart. Despite treatment, the pulmonary nodule doubled in size. This case represents the first antemortem report of ocular metastasis of a vaccine-associated sarcoma and supports the highly aggressive nature of these tumours.
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Affiliation(s)
- M Cohen
- Comparative Oncology Program, Animal Cancer Treatment Unit, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
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29
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Madala ND, Naicker S, Singh B, Naidoo M, Smith AN, Rughubar K. The pathogenesis of membranoproliferative glomerulonephritis in KwaZulu-Natal, South Africa is unrelated to hepatitis C virus infection. Clin Nephrol 2003; 60:69-73. [PMID: 12940606 DOI: 10.5414/cnp60069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 11/18/2022] Open
Abstract
Idiopathic membranoproliferative glomerulonephritis (MPGN) is a well-defined clinicopathological entity with a poor prognosis, with 50% of patients progressing to end stage renal disease (ESRD) within 10 years. It was reported in about 36% of adult Black patients with nephrotic syndrome in our center previously [Seedat et al. 1988]. Hepatitis C virus (HCV) infection has been shown to be associated with cryoglobulinemic as well as non-cryoglobulinemic (or idiopathic glomerulonephritis). The aim of this study was to determine whether an association exists between HCV infection and idiopathic MPGN in a population with a relatively high prevalence of MPGN. We studied adult patients referred with glomerular disease over a two-year period, 104 patients had primary glomerulonephritis. All 23 (22%) patients with idiopathic MPGN were enrolled, as well as 32 age-matched patients presenting with other primary glomerular diseases. We examined serum from all 55 patients for evidence of HCV antibodies and HCV RNA. None of the 55 patients showed evidence of HCV infection. Chronic renal failure was present in 82.6% of the patients with idiopathic MPGN and it was advanced in 52,2%, who either were dialysis-requiring at presentation or progressed to ESRD soon thereafter; 30.4% had moderate chronic renal failure, while only 17.4% had normal renal function. HCV infection is not associated with idiopathic MPGN in our patients. Idiopathic MPGN remains an idiopathic disease, possibly with a poor prognosis in our population.
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Affiliation(s)
- N D Madala
- Department of Medicine, Nelson R. Mandela School of Medicine, University of Natal, Durban, South Africa.
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30
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Abstract
Alpha II-spectrin is one of the major proteins responsible for maintaining the cytoskeletal integrity of the cell. The caspase 3-mediated cleavage of alpha II-spectrin during apoptotic cell death may play an important role in altering membrane stability and the formation of apoptotic bodies. In this study, we identified the primary caspase 3 cleavage site in alpha II-spectrin. We found that the transcriptional inhibitor, actinomycin D, induced caspase 3 activation and that caspase 3 activation is coincident with the cleavage of alpha II-spectrin protein at a primary cleavage site. Deletion analysis and site directed mutagenesis identified the primary cleavage site in alpha II spectrin at amino acid 1185 (DETD). The primary caspase 3 cleavage site in alpha II spectrin is conserved in immature and mature B cells. Our results indicate that alpha II-spectrin is initially cleaved at a caspase 3 consensus site and this primary event likely alters the structural conformation of the protein exposing subsequent cleavage sites and altering cytoskeletal integrity. Identification of the primary cleavage site for caspase 3 may help to elucidate the role of alpha II-spectrin in membrane stability and apoptosis as well as provide new insights into alpha II-spectrin autoantibody formation associated with the autoimmune disease, Sjögren's syndrome.
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Affiliation(s)
- S T Williams
- Department of Physiology & Biophysics, Wright State University School of Medicine, Dayton, OH 45435, USA
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31
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Abstract
In recent years, several inhibitors that prevent caspase activation and apoptosis have emerged. At high doses, however, these inhibitors can have nonspecific effects and/or become cytotoxic. In this study, we determined the effectiveness of broad spectrum caspase inhibitors to prevent apoptosis. A carboxy terminal phenoxy group conjugated to the amino acids valine and aspartate (Q-VD-OPh) potently inhibited apoptosis. Q-VD-OPh was significantly more effective in preventing apoptosis than the widely used inhibitors, ZVAD-fmk and Boc-D-fmk, and was also equally effective in preventing apoptosis mediated by the three major apoptotic pathways, caspase 9/3, caspase 8/10, and caspase 12. In addition to the increased effectiveness, Q-VD-OPh was not toxic to cells even at extremely high concentrations. Our data indicate that the specificity, effectiveness, and reduced toxicity of caspase inhibitors can be significantly enhanced using carboxyterminal o-phenoxy groups and may have important uses in vivo.
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Affiliation(s)
- T M Caserta
- Department of Physiology and Biophysics, Wright State University School of Medicine, Dayton, Ohio 45435, USA
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32
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Stover EH, Borthwick KJ, Bavalia C, Eady N, Fritz DM, Rungroj N, Giersch ABS, Morton CC, Axon PR, Akil I, Al-Sabban EA, Baguley DM, Bianca S, Bakkaloglu A, Bircan Z, Chauveau D, Clermont MJ, Guala A, Hulton SA, Kroes H, Li Volti G, Mir S, Mocan H, Nayir A, Ozen S, Rodriguez Soriano J, Sanjad SA, Tasic V, Taylor CM, Topaloglu R, Smith AN, Karet FE. Novel ATP6V1B1 and ATP6V0A4 mutations in autosomal recessive distal renal tubular acidosis with new evidence for hearing loss. J Med Genet 2002; 39:796-803. [PMID: 12414817 PMCID: PMC1735017 DOI: 10.1136/jmg.39.11.796] [Citation(s) in RCA: 197] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Autosomal recessive distal renal tubular acidosis (rdRTA) is characterised by severe hyperchloraemic metabolic acidosis in childhood, hypokalaemia, decreased urinary calcium solubility, and impaired bone physiology and growth. Two types of rdRTA have been differentiated by the presence or absence of sensorineural hearing loss, but appear otherwise clinically similar. Recently, we identified mutations in genes encoding two different subunits of the renal alpha-intercalated cell's apical H(+)-ATPase that cause rdRTA. Defects in the B1 subunit gene ATP6V1B1, and the a4 subunit gene ATP6V0A4, cause rdRTA with deafness and with preserved hearing, respectively. We have investigated 26 new rdRTA kindreds, of which 23 are consanguineous. Linkage analysis of seven novel SNPs and five polymorphic markers in, and tightly linked to, ATP6V1B1 and ATP6V0A4 suggested that four families do not link to either locus, providing strong evidence for additional genetic heterogeneity. In ATP6V1B1, one novel and five previously reported mutations were found in 10 kindreds. In 12 ATP6V0A4 kindreds, seven of 10 mutations were novel. A further nine novel ATP6V0A4 mutations were found in "sporadic" cases. The previously reported association between ATP6V1B1 defects and severe hearing loss in childhood was maintained. However, several patients with ATP6V0A4 mutations have developed hearing loss, usually in young adulthood. We show here that ATP6V0A4 is expressed within the human inner ear. These findings provide further evidence for genetic heterogeneity in rdRTA, extend the spectrum of disease causing mutations in ATP6V1B1 and ATP6V0A4, and show ATP6V0A4 expression within the cochlea for the first time.
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Affiliation(s)
- E H Stover
- Department of Medical Genetics, University of Cambridge, UK
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33
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Hudson CP, Moodley J, Smith AN. Stage of the epidemic and viral phenotype should influence recommendations regarding mother-to-child transmission of HIV-1. Lancet Infect Dis 2002; 2:115-9. [PMID: 11901643 DOI: 10.1016/s1473-3099(02)00186-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This article argues for a new approach to use of nevirapine in the prevention of vertical transmission of HIV-1. Existing antenatal surveillance should be strengthened to plan geographical allocation, and subsequent evaluation, of a "nevirapine plus" programme. As the epidemic evolves the programme should also and, ideally, care should be tailored to individual women. Underpinning this approach is evidence that a more virulent viral phenotype appears in many patients with advanced HIV-1 infection. This phenotype will become more common at the population level as the epidemic progresses. As efficacy of zidovudine correlates with viral phenotype, and use of the drug may alter phenotype, there is an urgent need for a replacement that is safe to use with nevirapine.
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Affiliation(s)
- C P Hudson
- Department of Virology, Nelson R Mandela Medical School, University of Natal, Durban, KwaZulu-Natal, South Africa
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34
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Cohen M, Wright JC, Brawner WR, Smith AN, Henderson R, Behrend EN. Use of surgery and electron beam irradiation, with or without chemotherapy, for treatment of vaccine-associated sarcomas in cats: 78 cases (1996-2000). J Am Vet Med Assoc 2001; 219:1582-9. [PMID: 11759998 DOI: 10.2460/javma.2001.219.1582] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [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: 11/20/2022]
Abstract
OBJECTIVE To evaluate responses of cats with vaccine-associated sarcomas to treatment with surgery and radiotherapy, with or without adjunctive chemotherapy. DESIGN Retrospective study. ANIMALS 76 cats (78 tumors). PROCEDURE Medical records were reviewed. Factors potentially associated with survival time, time to recurrence, and time to development of metastases were evaluated. RESULTS Following excision, electron beam radiation, and, in some cases, chemotherapy, 32 (41%) cats experienced recurrence, and 9 (12%) cats developed metastases. One- and 2-year survival rates were 86 and 44%, respectively. Median survival time from onset of disease was 730 days (range, 30 to 2,014 days). Median disease-free interval was 405 days (range, 30 to 925 days). Cats that underwent only 1 surgery prior to radiotherapy had a lower recurrence rate than did cats that underwent > 1 surgery and had a significantly longer disease-free interval. Survival time and disease-free interval decreased as time between surgery and the start of radiotherapy increased. Cats that developed metastases had significantly shorter survival times and disease-free intervals than did cats that did not develop metastases. Castrated male cats had a significantly shorter survival time than did spayed female cats. Cats with larger tumors prior to the first surgery had shorter survival times. Twenty-six cats received chemotherapy in addition to surgery and radiotherapy. Whether cats received chemotherapy was not associated with recurrence rate, metastasis rate, or survival time. CONCLUSIONS AND CLINICAL RELEVANCE Results suggest that excision followed by electron beam irradiation may be beneficial for treatment of cats with vaccine-associated sarcomas. Extent of excision prior to radiotherapy did not seem to be associated with recurrence rate.
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Affiliation(s)
- M Cohen
- Animal Cancer Treatment Unit, College of Veterinary Medicine, Auburn University, AL 36849-5523, USA
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35
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Smith AN, Finberg KE, Wagner CA, Lifton RP, Devonald MA, Su Y, Karet FE. Molecular cloning and characterization of Atp6n1b: a novel fourth murine vacuolar H+-ATPase a-subunit gene. J Biol Chem 2001; 276:42382-8. [PMID: 11495928 DOI: 10.1074/jbc.m107267200] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.7] [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: 02/04/2023] Open
Abstract
The 116-kDa a-subunit of the vacuolar proton pump (H(+)-ATPase) exists as several isoforms encoded by different genes and with different patterns of tissue expression. Its function within the multisubunit pump complex has yet to be elucidated. To date, three isoforms have been identified in mouse (designated a1-a3). We now report the cloning and characterization of Atp6n1b, encoding a novel fourth murine isoform (a4). Murine a4 has 833 residues and shows 85% amino acid identity to the human kidney-specific ATP6N1B protein in which loss-of-function alterations cause autosomal recessive distal renal tubular acidosis. The human and murine genes have similar genomic organization; furthermore, Atp6n1b maps to a region of mouse chromosome 6 that is syntenic with the segment of human 7q33-34 containing ATP6N1B. Together these findings establish the two genes as orthologs. The mouse a4 protein is 61, 52, and 47% identical to a1, a2, and a3, respectively. Phylogenetic analysis confirms that among vertebrates there are four a-subunit families, with a4 most resembling a1. Northern blot analysis of Atp6n1b reveals a 3.7-kilobase a4 transcript in kidney but not other major organs, and a reverse transcription polymerase chain reaction in 12 mouse tissues detects expression in kidney alone. Immunofluorescence studies in murine kidney demonstrate high intensity a4 staining at the surface of intercalated cells, with additional expression in the proximal tubule (not previously reported in human kidney). Similar apical a4 immunostaining is also present in male genital tissue. Identification of this novel murine kidney-enriched 116-kDa a-subunit provides a molecular tool for investigation of the currently unknown role of this protein, which is essential for proper function of the apical renal vacuolar H(+)-ATPase in man.
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Affiliation(s)
- A N Smith
- Department of Medical Genetics, Cambridge Institute for Medical Research, Box 139 Addenbrooke's Hospital, Cambridge CB2 2XY, United Kingdom
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36
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Bishop KS, Blumberg L, Trollip AP, Smith AN, Roux L, York DF, Kiepiela P. Characterisation of the pncA gene in Mycobacterium tuberculosis isolates from Gauteng, South Africa. Int J Tuberc Lung Dis 2001; 5:952-7. [PMID: 11605890] [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] [Indexed: 02/21/2023] Open
Abstract
SETTING The use of pyrazinamide (PZA) is important for the treatment of Mycobacterium tuberculosis as it is bactericidal to semi-dormant mycobacteria that are not affected by other drugs. The incidence of resistance to PZA and other drugs used in the treatment of M. tuberculosis is increasing in South Africa. OBJECTIVE To characterise the pncA gene of M. tuberculosis isolates from Gauteng, South Africa, and to develop a rapid diagnostic method. DESIGN The pncA gene and the putative regulatory gene were characterised by sequence analysis in a total of six PZA susceptible and 15 resistant isolates. The association with classical PZA susceptibility testing and PZase activity was determined. RESULTS All PZA-resistant isolates were PZase negative as well as resistant to at least one other anti-tuberculosis drugs. Mutations were identified throughout the length of the pncA gene in 10/15 PZA-resistant isolates. Five lacked PZase activity, but the wild type pncA sequence was present. In all six PZase-positive strains, a PZA-susceptible pattern was obtained on BACTEC and the wild type pncA sequence was present. CONCLUSION Sequencing is an effective means to identify mutations in the pncA gene in M. tuberculosis and therefore resistance to PZA. The fact that some PZA-resistant M. tuberculosis isolates lack mutations in the pncA gene suggests that alternative mechanisms for drug resistance exist. In PZase negative strains with no genetic changes which are resistant to 100 microg/ml and susceptible to 300 microg/ml, 300 microg/ml may be a more reliable breakpoint.
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Affiliation(s)
- K S Bishop
- Department of Virology, Faculty of Medicine, University of Natal, Durban, KwaZulu-Natal, South Africa
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37
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Johnson GC, Esposito L, Barratt BJ, Smith AN, Heward J, Di Genova G, Ueda H, Cordell HJ, Eaves IA, Dudbridge F, Twells RC, Payne F, Hughes W, Nutland S, Stevens H, Carr P, Tuomilehto-Wolf E, Tuomilehto J, Gough SC, Clayton DG, Todd JA. Haplotype tagging for the identification of common disease genes. Nat Genet 2001; 29:233-7. [PMID: 11586306 DOI: 10.1038/ng1001-233] [Citation(s) in RCA: 908] [Impact Index Per Article: 39.5] [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: 01/10/2023]
Abstract
Genome-wide linkage disequilibrium (LD) mapping of common disease genes could be more powerful than linkage analysis if the appropriate density of polymorphic markers were known and if the genotyping effort and cost of producing such an LD map could be reduced. Although different metrics that measure the extent of LD have been evaluated, even the most recent studies have not placed significant emphasis on the most informative and cost-effective method of LD mapping-that based on haplotypes. We have scanned 135 kb of DNA from nine genes, genotyped 122 single-nucleotide polymorphisms (SNPs; approximately 184,000 genotypes) and determined the common haplotypes in a minimum of 384 European individuals for each gene. Here we show how knowledge of the common haplotypes and the SNPs that tag them can be used to (i) explain the often complex patterns of LD between adjacent markers, (ii) reduce genotyping significantly (in this case from 122 to 34 SNPs), (iii) scan the common variation of a gene sensitively and comprehensively and (iv) provide key fine-mapping data within regions of strong LD. Our results also indicate that, at least for the genes studied here, the current version of dbSNP would have been of limited utility for LD mapping because many common haplotypes could not be defined. A directed re-sequencing effort of the approximately 10% of the genome in or near genes in the major ethnic groups would aid the systematic evaluation of the common variant model of common disease.
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Affiliation(s)
- G C Johnson
- JDRF/WT Diabetes and Inflammation Laboratory, Cambridge Institute for Medical Research, University of Cambridge, Wellcome Trust/Medical Research Council Building, Hills Road, Cambridge, UK
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38
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Smith AN, Wright JC, Brawner WR, LaRue SM, Fineman L, Hogge GS, Kitchell BE, Hohenhaus AE, Burk RL, Dhaliwal RS, Duda LE. Radiation therapy in the treatment of canine and feline thymomas: a retrospective study (1985-1999). J Am Anim Hosp Assoc 2001; 37:489-96. [PMID: 11563450 DOI: 10.5326/15473317-37-5-489] [Citation(s) in RCA: 42] [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: 11/11/2022]
Abstract
A retrospective study was performed of 17 dogs and seven cats with various stages of thymoma treated with radiation alone or as an adjunctive therapy. Analysis revealed an overall response rate of 75% (15/20 evaluable cases). Partial (i.e., >50% reduction in tumor size) and complete (i.e., no detectable tumor) responses were included. Complete responses were rare (4/20). Three of five animals with stable disease (i.e., <50% change in tumor size) had improvements in clinical signs, despite lack of measurable response. A median survival time of 248 days (range, 93 to 1,657+ days) was achieved in dogs, and a median survival time of 720 days (range, 485 to 1,825+ days) was achieved in cats. Radiation therapy appears to be useful in the management of invasive thymomas in dogs and cats.
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Affiliation(s)
- A N Smith
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, Alabama 36849, USA
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39
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Hudson CP, Smith AN, Moodley J. To test or not to test--ethical dilemmas and practical realities in the use of co-trimoxazole and nevirapine in HIV-infected adults. S Afr Med J 2001; 91:656-8. [PMID: 11584779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Affiliation(s)
- C P Hudson
- Department of Virology, Nelson R Mandela School of Medicine, University of Natal, Durban
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40
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Abstract
The placenta is formed by developing trophoblast cells to facilitate fluid, gas and nutrient exchange with the mother. Inappropriate trophoblast responsiveness can lead to life threatening complications during pregnancy including intrauterine growth retardation, pre-eclampsia, spontaneous abortion and malignancy that could lead to fetal loss. Transforming growth factor beta (TGFbeta) is a multifunctional cytokine required for embryonic development and is an important regulator of human trophoblast function. Although TGFbeta is critical for placental and embryonic development, there are currently no established TGFbeta-responsive human trophoblast-derived cell lines available to study the mechanisms by which TGFbeta regulates trophoblast function. Our studies have examined the transformed human trophoblast-derived cell line, ED27, to determine if it is responsive to TGFbeta. Our data indicate that TGFbeta dose responsively and reversibly inhibits cell growth in ED27 cells and induces classic TGFbeta response genes, fibronectin and plasminogen activator inhibitor 1 (PAI-1). TGFbeta also induces an inhibitor of trophoblast invasion, tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) in ED27 cells. Our studies have identified a human trophoblast-derived cell line that parallels isolated primary human trophoblasts in their responses to TGFbeta. This cell line may provide us with the opportunity to determine TGFbeta-mediated responses on human trophoblast functions not previously possible.
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Affiliation(s)
- A N Smith
- Department of Physiology and Cell Biophysics, Wright State University School of Medicine, Dayton, Ohio 45435, USA
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41
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42
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Smith AN, Skaug J, Choate KA, Nayir A, Bakkaloglu A, Ozen S, Hulton SA, Sanjad SA, Al-Sabban EA, Lifton RP, Scherer SW, Karet FE. Mutations in ATP6N1B, encoding a new kidney vacuolar proton pump 116-kD subunit, cause recessive distal renal tubular acidosis with preserved hearing. Nat Genet 2000; 26:71-5. [PMID: 10973252 DOI: 10.1038/79208] [Citation(s) in RCA: 268] [Impact Index Per Article: 11.2] [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: 11/09/2022]
Abstract
The multi-subunit H+-ATPase pump is present at particularly high density on the apical (luminal) surface of -intercalated cells of the cortical collecting duct of the distal nephron, where vectorial proton transport is required for urinary acidification. The complete subunit composition of the apical ATPase, however, has not been fully agreed upon. Functional failure of -intercalated cells results in a group of disorders, the distal renal tubular acidoses (dRTA), whose features include metabolic acidosis accompanied by disturbances of potassium balance, urinary calcium solubility, bone physiology and growth. Mutations in the gene encoding the B-subunit of the apical pump (ATP6B1) cause dRTA accompanied by deafness. We previously localized a gene for dRTA with preserved hearing to 7q33-34 (ref. 4). We report here the identification of this gene, ATP6N1B, which encodes an 840 amino acid novel kidney-specific isoform of ATP6N1A, the 116-kD non-catalytic accessory subunit of the proton pump. Northern-blot analysis demonstrated ATP6N1B expression in kidney but not other main organs. Immunofluorescence studies in human kidney cortex revealed that ATP6N1B localizes almost exclusively to the apical surface of -intercalated cells. We screened nine dRTA kindreds with normal audiometry that linked to the ATP6N1B locus, and identified different homozygous mutations in ATP6N1B in eight. These include nonsense, deletion and splice-site changes, all of which will truncate the protein. Our findings identify a new kidney-specific proton pump 116-kD accessory subunit that is highly expressed in proton-secreting cells in the distal nephron, and illustrate its essential role in normal vectorial acid transport into the urine by the kidney.
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MESH Headings
- Acidosis, Renal Tubular/genetics
- Acidosis, Renal Tubular/metabolism
- Acidosis, Renal Tubular/urine
- Adenosine Triphosphatases/genetics
- Adenosine Triphosphatases/metabolism
- Adolescent
- Adult
- Amino Acid Sequence
- Audiometry
- Blotting, Northern
- Brain/metabolism
- Child
- Child, Preschool
- Chromosomes, Human, Pair 7
- Contig Mapping
- DNA, Complementary/metabolism
- Exons
- Female
- Gene Deletion
- Genes, Recessive
- Genetic Linkage
- Genetic Markers
- Hearing/genetics
- Hearing/physiology
- Homozygote
- Humans
- Kidney/metabolism
- Kidney/pathology
- Kidney Cortex/metabolism
- Male
- Microscopy, Fluorescence
- Mitochondrial Proton-Translocating ATPases
- Models, Genetic
- Molecular Sequence Data
- Mutation
- Pedigree
- Physical Chromosome Mapping
- Polymorphism, Genetic
- Polymorphism, Single-Stranded Conformational
- Pregnancy Proteins
- Protein Biosynthesis
- Protein Isoforms
- Proton Pumps/biosynthesis
- Proton Pumps/chemistry
- Proton Pumps/genetics
- Proton-Translocating ATPases
- RNA Splicing
- Recombination, Genetic
- Sequence Homology, Amino Acid
- Suppressor Factors, Immunologic
- Tissue Distribution
- Vacuolar Proton-Translocating ATPases
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Affiliation(s)
- A N Smith
- Wellcome Trust Centre for Molecular Mechanisms in Disease, University of Cambridge, Cambridge, UK
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Kiepiela P, Bishop KS, Smith AN, Roux L, York DF. Genomic mutations in the katG, inhA and aphC genes are useful for the prediction of isoniazid resistance in Mycobacterium tuberculosis isolates from Kwazulu Natal, South Africa. Tuber Lung Dis 2000; 80:47-56. [PMID: 10897383 DOI: 10.1054/tuld.1999.0231] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Genotypic analysis of isoniazid (INH) resistance in 79 isolates of M. tuberculosis (MTB) was undertaken by PCR-single strand conformation polymorphism (SSCP), Msp1 restriction enzyme analysis and sequence analysis of specific regions of three genes (part of the coding sequence of katG, and promoter regions of the inhA operon and ahpC) in order to determine the particular allelic variants within these genes. The epidemiologic relatedness was determined using IS6110 and polymorphic G-C region (PGRS (MTB484(1)) based restriction fragment length polymorphism (RFLP). Mutations in katG, inhA locus and ahpC were identified in 77/79, 19/79 and 10/79 isolates respectively. The ability of PCR-SSCP to detect mutations associated with INH resistance in katG, inhA and ahpC genes was 100% (CI 91.2-99.7%), 98.7% (CI 74.0-99.9%), and 100% (CI 69.2-100%) respectively. Specificity was 100%. All isolates with mutations in the 209 bp fragment of the MTB katG gene containing the Ser315Thr codon were positive by PCR-RFLP using Msp1 enzyme restriction analysis. Sixteen of 19 isolates with alterations on the 3' end of the ribosome binding site upstream of mabA in inhA locus simultaneously harbored Ser315Thr mutations in KatG. In 9/10 isolates, mutations in the ahpC promoter region were located in the 105 bp oxyR-ahpC intergenic region. None of 17 INH drug susceptible isolates harbored mutations in any of the three genetic regions, although the katG1 allele (Arg 463 Leu) was present in one isolate. Characterization by IS6110/PGRS(MTB484(1))RFLP analysis revealed that a number of drug resistant clones are widespread in the community. We conclude that the frequency of the Ser315Thr katG mutation in the local strain population makes the PCR-RFLP MTB katG assay a reliable, rapid and useful method for detecting INH resistance.
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Affiliation(s)
- P Kiepiela
- Department of Virology, University of Natal, Faculty of Medicine, Durban, South Africa.
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44
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Smith AN, Spencer JA, Stringfellow JS, Vygantas KR, Welch JA. Disseminated infection with Phialemonium obovatum in a German shepherd dog. J Am Vet Med Assoc 2000; 216:708-12, 684-5. [PMID: 10707686 DOI: 10.2460/javma.2000.216.708] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 11/20/2022]
Abstract
A 4-year-old spayed female German Shepherd Dog was evaluated because of left forelimb lameness. A fungal granuloma on the distal portion of the radius was determined to be the cause of the lameness; the infecting organism was identified as Phialemonium obovatum. Despite aggressive treatment with amphotericin B, itraconazole, and ketoconazole and curettage of the local area, the dog developed systemic disease and was euthanatized 5 months after initial evaluation. Immune dysfunction may have played a role in development of disseminated disease, because although serum concentrations of total IgG, IgA, and IgM were within or greater than reference ranges, results of lymphocyte proliferation assays were abnormal, which indicated cellular immune dysfunction. Infection with Phialemonium obovatum should be considered as a differential diagnosis when branching fungal organisms are detected during histologic, cytologic, or microbiologic evaluation of tissue specimens.
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Affiliation(s)
- A N Smith
- Department of Small Animal Surgery, College of Veterinary Medicine, Auburn University, AL 36849, USA
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45
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Mein CA, Barratt BJ, Dunn MG, Siegmund T, Smith AN, Esposito L, Nutland S, Stevens HE, Wilson AJ, Phillips MS, Jarvis N, Law S, de Arruda M, Todd JA. Evaluation of single nucleotide polymorphism typing with invader on PCR amplicons and its automation. Genome Res 2000; 10:330-43. [PMID: 10720574 PMCID: PMC311429 DOI: 10.1101/gr.10.3.330] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Large-scale pharmacogenetics and complex disease association studies will require typing of thousands of single-nucleotide polymorphisms (SNPs) in thousands of individuals. Such projects would benefit from a genotyping system with accuracy >99% and a failure rate <5% on a simple, reliable, and flexible platform. However, such a system is not yet available for routine laboratory use. We have evaluated a modification of the previously reported Invader SNP-typing chemistry for use in a genotyping laboratory and tested its automation. The Invader technology uses a Flap Endonuclease for allele discrimination and a universal fluorescence resonance energy transfer (FRET) reporter system. Three hundred and eighty-four individuals were genotyped across a panel of 36 SNPs and one insertion/deletion polymorphism with Invader assays using PCR product as template, a total of 14,208 genotypes. An average failure rate of 2.3% was recorded, mostly associated with PCR failure, and the typing was 99.2% accurate when compared with genotypes generated with established techniques. An average signal-to-noise ratio (9:1) was obtained. The high degree of discrimination for single base changes, coupled with homogeneous format, has allowed us to deploy liquid handling robots in a 384-well microtitre plate format and an automated end-point capture of fluorescent signal. Simple semiautomated data interpretation allows the generation of approximately 25,000 genotypes per person per week, which is 10-fold greater than gel-based SNP typing and microsatellite typing in our laboratory. Savings on labor costs are considerable. We conclude that Invader chemistry using PCR products as template represents a useful technology for typing large numbers of SNPs rapidly and efficiently.
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Affiliation(s)
- C A Mein
- Wellcome Trust Centre for the Study of Molecular Mechanisms in Disease, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 2XY UK
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46
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Abstract
A one-year-old, intact male, 28-kg, mixed-breed dog developed neurological episodes consistent with emboli. An acquired III/VI holosystolic heart murmur was ausculted in the mitral area, and valvular endocarditis with pulmonic and aortic insufficiency were noted at echocardiographic examination. An abnormal communication (i.e., fistula) between the left ventricular outflow tract (LVOT) and the left atrium adjacent to the mitral valve annulus was noted with Doppler imaging and confirmed with angiography. Infective valvular endocarditis was confirmed based on two of three blood cultures being positive for Staphylococcus intermedius. In humans, a sequela to infective endocarditis of the aortic or mitral valve, or both, is rupture of the mitral-aortic intervalvular fibrosa, resulting in a communication between the LVOT and the left atrium. This is the first report of this sequela in the dog.
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Affiliation(s)
- A N Smith
- Small Animal Teaching Hospital, College of Veterinary Medicine, Auburn University, Alabama 36849-5523, USA
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Hostetler JL, Smith AN, Czajkowsky DM, Norris PM. Measurement of the electron-phonon coupling factor dependence on film thickness and grain size in Au, Cr, and Al. Appl Opt 1999; 38:3614-3620. [PMID: 18319965 DOI: 10.1364/ao.38.003614] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Femtosecond thermoreflectance data for thin films and bulk quantities of Au, Cr, and Al are compared with the parabolic two-step thermal diffusion model for the purpose of determining the electron-phonon coupling factor. The thin films were evaporated and sputtered onto different substrates to produce films that vary structurally. The measurement of the electron-phonon coupling factor is shown to be sensitive to grain size and film thickness. The thin-film thermoreflectance data are compared with that of the corresponding bulk material and to a theoretical model relating the coupling rate to the grain-boundary scattering and size effects on the mean free path of the relevant energy carrier.
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Affiliation(s)
- J L Hostetler
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22903, USA
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Mein CA, Esposito L, Dunn MG, Johnson GC, Timms AE, Goy JV, Smith AN, Sebag-Montefiore L, Merriman ME, Wilson AJ, Pritchard LE, Cucca F, Barnett AH, Bain SC, Todd JA. A search for type 1 diabetes susceptibility genes in families from the United Kingdom. Nat Genet 1998; 19:297-300. [PMID: 9662409 DOI: 10.1038/991] [Citation(s) in RCA: 236] [Impact Index Per Article: 9.1] [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] [Indexed: 02/08/2023]
Abstract
Genetic analysis of a mouse model of major histocompatability complex (MHC)-associated autoimmune type 1 (insulin-dependent) diabetes mellitus (IDDM) has shown that the disease is caused by a combination of a major effect at the MHC and at least ten other susceptibility loci elsewhere in the genome. A genome-wide scan of 93 affected sibpair families (ASP) from the UK (UK93) indicated a similar genetic basis for human type 1 diabetes, with the major genetic component at the MHC locus (IDDM1) explaining 34% of the familial clustering of the disease (lambda(s)=2.5; refs 3,4). In the present report, we have analysed a further 263 multiplex families from the same population (UK263) to provide a total UK data set of 356 ASP families (UK356). Only four regions of the genome outside IDDM1/MHC, which was still the only major locus detected, were not excluded at lambda(s)=3 and lod=-2, of which two showed evidence of linkage: chromosome 10p13-p11 (maximum lod score (MLS)=4.7, P=3x10(-6), lambda(s)=1.56) and chromosome 16q22-16q24 (MLS=3.4, P=6.5x10(-5), lambda(s)=1.6). These and other novel regions, including chromosome 14q12-q21 and chromosome 19p13-19q13, could potentially harbour disease loci but confirmation and fine mapping cannot be pursued effectively using conventional linkage analysis. Instead, more powerful linkage disequilibrium-based and haplotype mapping approaches must be used; such data is already emerging for several type 1 diabetes loci detected initially by linkage.
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Affiliation(s)
- C A Mein
- Wellcome Trust Centre for Human Genetics, Nuffield Department of Surgery, University of Oxford, UK
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Abstract
OBJECTIVES To examine the causes of death among 1130 former workers of a plant in Tyler, Texas dedicated to the manufacture of asbestos pipe insulation materials. This cohort is important and unusual because it used amosite as the only asbestiform mineral in the production process. High level exposure of such a specific type was documented through industrial hygiene surveys in the plant. METHODS Deaths were ascertained through various sources including data tapes from the Texas Department of Health and the national death index files. As many death certificates as possible were secured (304/315) and cause of death assigned. After select exclusions, 222 death certificates were used in the analysis. Causes of death were compared with age, race, and sex specific mortalities for the United States population with a commercial software package (OCMAP Version 2.0). RESULTS There was an excess of deaths from respiratory cancer including the bronchus, trachea, and lung (standardised mortality ratio (SMR) 277 with 95% confidence interval (95% CI) 193 to 385). Four pleural mesotheliomas and two peritoneal mesotheliomas were identified. The analysis also showed an increasing risk of respiratory malignancy with increased duration of exposure including a significant excess of total deaths from respiratory cancer with less than six months of work at the plant (SMR 268 with 95% CI 172 to 399). CONCLUSIONS The importance of the cohort lies with the pure amosite exposure which took place in the plant and the extended period of latency which has followed. The death certificate analysis indicates the pathogenicity of amosite, the predominant commercial amphibole used in the United States. These data confirm a link between amosite asbestos and respiratory malignancy as well as mesothelioma.
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Affiliation(s)
- J L Levin
- Department of Occupational and Environmental Medicine, University of Texas Health Center 75710, USA
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Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, that encompasses 250 kb of genomic DNA, cause cystic fibrosis. More than 5-10% of CF patients in most populations studied carry undefined mutations and hence intragenic CA repeats are important tools in genetic counselling. To date, polymorphic intragenic repeats have been found in introns 6a, 8 and 17b. We have identified a novel CA repeat within intron 1 of the CFTR gene that lies about 70 kb 5' to intron 6a and so will be a useful additional diagnostic marker.
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Affiliation(s)
- D S Moulin
- Institute of Molecular Medicine, Oxford University, John Radcliffe Hospital, UK
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