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Benitez AJ, McGar A, Kohser K, Gibbons T, Muir A, Mascarenhas M, Rossi C, Dogias F, Golden A, Kassam-Adams N, Marsac ML. The Cellie Coping Kit for children with Eosinophilic Esophagitis: Feasibility, acceptability, and preliminary outcomes. J Child Health Care 2023; 27:374-385. [PMID: 34978212 PMCID: PMC11007661 DOI: 10.1177/13674935211064126] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Children with eosinophilic esophagitis (EoE) are faced with ongoing treatments that can impact their wellbeing. There are no evidence-based resources that families can implement independently to cope with EoE-related stressors. This study aimed to examine acceptability, feasibility, and preliminary outcomes of the newly developed Cellie Coping Kit for Children with EoE intervention. Forty child-caregiver dyads completed a baseline assessment (T1) and initiated the intervention; 30 (75%) child participants and 33 (82.5%) caregivers were retained to follow-up (T2). Of those who completed the T2 assessment, most reported that the intervention was easy to use (>90%) and would recommend the intervention to others (>90%). The intervention was feasible: >70% used the kit, and most indicated they would use it again (>75%). More than half of families reported learning new information and/or coping strategies. No statistically significant changes were identified in comparing T1 and T2 coping and health-related quality of life. These findings suggest that the Cellie Coping Kit for Children with EoE is a promising intervention in that it was well accepted, feasible, and helped many families learn novel strategies on how to manage EoE challenges. Future research should examine how to strengthen the intervention to achieve longer-term targeted outcomes.
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Affiliation(s)
- Alain J Benitez
- Division of Gastroenterology, Hepatology and Nutrition, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Ashley McGar
- University of Kentucky School of Medicine and Kentucky Children’s Hospital, Lexington, KY, USA
| | - Kristen Kohser
- Center for Pediatric Traumatic Stress, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Troy Gibbons
- University of Kentucky School of Medicine and Kentucky Children’s Hospital, Lexington, KY, USA
| | - Amanda Muir
- Division of Gastroenterology, Hepatology and Nutrition, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Maria Mascarenhas
- Division of Gastroenterology, Hepatology and Nutrition, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Carmen Rossi
- Division of Gastroenterology, Hepatology and Nutrition, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Francesca Dogias
- Center for Pediatric Traumatic Stress, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Anneliese Golden
- Center for Pediatric Traumatic Stress, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Nancy Kassam-Adams
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Center for Pediatric Traumatic Stress, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Meghan L Marsac
- University of Kentucky School of Medicine and Kentucky Children’s Hospital, Lexington, KY, USA
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2
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Zelig R, Goldstein S, Touger-Decker R, Firestone E, Golden A, Johnson Z, Kaseta A, Sackey J, Tomesko J, Parrott JS. Tooth Loss and Nutritional Status in Older Adults: A Systematic Review and Meta-analysis. JDR Clin Trans Res 2020; 7:4-15. [PMID: 33345687 DOI: 10.1177/2380084420981016] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND/OBJECTIVE Older adults are at risk for tooth loss and compromised nutritional status. Our objective was to conduct a systematic review and meta-analysis to answer the following question: Among adults aged ≥60 y living in developed countries, what are the associations between tooth loss and nutritional status as assessed by a validated nutrition screening or assessment tool? METHODS PRISMA guidelines were followed. PubMed, Scopus, CINAHL, Web of Science, and MEDLINE were searched for studies published in English between 2009 and 2019 that met inclusion criteria. Data extracted included study and participant characteristics, dentition, and nutritional status. Risk of bias was assessed with a modified Newcastle-Ottawa Scale. Random effects meta-analysis was used. RESULTS Of the 588 unduplicated articles identified, 78 were reviewed in full text, and 7 met inclusion criteria. Six studies were combined for a meta-analysis, which revealed that individuals who were completely edentulous or who lacked functional dentition had a 21% increased likelihood of being at risk of malnutrition or being malnourished, as compared with those who were dentulous or had functionally adequate dentition (risk ratio, 1.21; 95% CI, 1.11 to 1.32; I2 = 70%). Whether the article statistically adjusted for medical history explained most of the heterogeneity in the pooled effect. CONCLUSIONS AND IMPLICATIONS Findings suggest that older adults with tooth loss are at greater risk of malnutrition than those with functionally adequate dentition. Use of validated tools to assess risk of malnutrition in older adults with tooth loss is important to promote early intervention and referral to optimize nutrition and oral health status. Findings were limited by heterogeneity, risk of bias, and overall quality of the studies reviewed. Cohort studies that adjust for known confounders and use consistent approaches to assess tooth loss and nutritional status are needed. KNOWLEDGE TRANSFER STATEMENT The results of this study suggest that older adults with tooth loss are at greater risk of malnutrition than those with functionally adequate dentition. Screening of this population for malnutrition by health care professionals, including dentists and dietitians, may result in corresponding referrals to optimize nutrition and oral health status. Further research is needed with consistent approaches to assess tooth loss and nutritional status.
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Affiliation(s)
- R Zelig
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA.,Department of Diagnostic Sciences, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - S Goldstein
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - R Touger-Decker
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA.,Department of Diagnostic Sciences, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - E Firestone
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - A Golden
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - Z Johnson
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - A Kaseta
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - J Sackey
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - J Tomesko
- Department of Clinical and Preventive Nutrition Sciences, Rutgers School of Health Professions, Newark, NJ, USA
| | - J S Parrott
- Department of Interdisciplinary Studies, Rutgers School of Health Professions, Newark, NJ, USA
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Goldstein S, Zelig R, Parrott J, Firestone E, Golden A, Johnson Z, Kaseta A, Tomesko J, Sackey J, Touger-Decker R. Exploring the Associations Between Tooth Loss and Nutrition Status in Adults 60 Years and Older: A Systematic Review and Meta-Analysis. J Acad Nutr Diet 2020. [DOI: 10.1016/j.jand.2020.06.219] [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: 11/25/2022]
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Davies M, Weber J, Flaherty K, McArthur G, Reddy M, Golden A, Culbertson J, Thomas C, Tawbi H, Long G. A phase II, open-label, randomized, multicenter trial of encorafenib + binimetinib evaluating a standard-dose and a high-dose regimen in patients with BRAFV600-mutant melanoma brain metastasis (MBM) (POLARIS). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz255.067] [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: 11/13/2022] Open
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5
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Burke R, Frank L, Sun F, Golden A, O’Hare A, Fabiny A. INSIGHTS FROM THE EXECUTIVE BRANCH: FELLOW EXPERIENCES IN FEDERAL AGENCIES AND ORGANIZATIONS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.747] [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: 11/14/2022] Open
Affiliation(s)
- R Burke
- Denver VA Medical Center/University of Colorado, Denver, Colorado, United States
| | - L Frank
- The Patient Centered Outcomes Research Institute, Washington, DC, USA
| | - F Sun
- Michigan State University, East Lansing, MI, USA
| | - A Golden
- University of Central Florida and Orlando VA, Orlando, FL, USA
| | | | - A Fabiny
- San Francisco VA, San Francisco, CA, USA
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Surakat OA, Sam-Wobo SO, De Los Santos T, Faulx D, Golden A, Ademolu K, Yokobe L, Adeleke MA, Bankole SO, Adekunle ON, Abimbola WA, Mafiana CF. Seroprevalence of onchocerciasis in Ogun State, Nigeria after ten years of mass drug administration with ivermectin. S Afr J Infect Dis 2018. [DOI: 10.4102/sajid.v33i3.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Background: This serological study conducted between March and July 2015 investigated the status of onchocerciasis in Ogun State, Nigeria after a decade of mass drug administration (MDA) with ivermectin. Baseline information from the rapid epidemiological mapping of onchocerciasis (REMO) prior to MDA had indicated that Ogun State was meso-endemic to onchocerciasis. Following years of treatment with ivermectin, it has become important to investigate the current status of the disease using more sensitive diagnostic methods.Methods: The study was conducted in 32 communities in eight onchocerciasis-endemic local government areas (LGAs). Using the Ov16 rapid diagnostic test (Ov16 RDT), finger-prick whole blood was obtained from 3 895 consented participants from age five and above. Skin snips were obtained from a subset of 481 corresponding participants as the majority of community members did not consent to skin snipping.Results: Study revealed a cumulative seroprevalence of 9.3% (CI 9.29–9.31%) by RDT and 17.3% (CI 16.73–18.34%) microfilaridermia prevalence by the skin snip subset. Seroprevalence among children between the ages of five and nine was 2.9% (CI 1.74–3.53%) across all LGAs. A community microfilaria load (CMFL) between 0 and 1.21 MF/skin snip was recorded in the different communities studied. Among the studied LGAs, children in Odeda LGA recorded the highest seroprevalence by RDT (14.9%) followed by Abeokuta North (5.1%), Abeokuta South (4.8%) and Imeko-Afon (0.6%), while Ewekoro, Ifo, Obafemi-Owode and Yewa North LGAs recorded zero prevalence.Conclusion: It appears that the elimination of onchocerciasis in some LGAs is possible considering the lack of new infection among children and the hypo-endemicity among the adult population. However, the microfilaria prevalence observed among adults is of concern as it may imply that mass treatment has not been effective. Increased therapeutic coverage is advised to fully maximise the potential of ivermectin treatment to achieve the disease elimination.
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7
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Surakat OA, Sam-Wobo SO, De Los Santos T, Faulx D, Golden A, Ademolu K, Yokobe L, Adeleke MA, Bankole SO, Adekunle ON, Abimbola WA, Mafiana CF. Seroprevalence of onchocerciasis in Ogun State, Nigeria after ten years of mass drug administration with ivermectin. S Afr J Infect Dis 2018. [DOI: 10.1080/23120053.2017.1408233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- OA Surakat
- Department of Pure and Applied Zoology, College of Biosciences, Federal University of Agriculture , Abeokuta, Nigeria
| | - SO Sam-Wobo
- Department of Pure and Applied Zoology, College of Biosciences, Federal University of Agriculture , Abeokuta, Nigeria
| | - T De Los Santos
- Programme for Appropriate Technology in Health (PATH ), Seattle, WA, USA
| | - D Faulx
- Programme for Appropriate Technology in Health (PATH ), Seattle, WA, USA
| | - A Golden
- Programme for Appropriate Technology in Health (PATH ), Seattle, WA, USA
| | - K Ademolu
- Department of Pure and Applied Zoology, College of Biosciences, Federal University of Agriculture , Abeokuta, Nigeria
| | - L Yokobe
- Programme for Appropriate Technology in Health (PATH ), Seattle, WA, USA
| | - MA Adeleke
- Department of Biological Sciences, Osun State University , Osogbo, Nigeria
| | - SO Bankole
- Department of Pure and Applied Zoology, College of Biosciences, Federal University of Agriculture , Abeokuta, Nigeria
| | - ON Adekunle
- Department of Plant Science and Applied Zoology, Olabisi Onabanjo University , Ago-Iwoye, Nigeria
| | - WA Abimbola
- Department of Plant Science and Applied Zoology, Olabisi Onabanjo University , Ago-Iwoye, Nigeria
| | - CF Mafiana
- Deputy Executive Secretary’s Office, National University Commission , Abuja, Nigeria
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Kulzer B, Wehrhahn T, Kaplan L, Golden A, O'Neil P, Nadglowski J, Kolotkin R, Kyle T, Look M, Dhurandhar N, Lum C, Donsmark M. Divergence of patient and clinician perceptions of obesity and weight management. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580945] [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: 10/21/2022]
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Hallinan G, Littlefair SP, Cotter G, Bourke S, Harding LK, Pineda JS, Butler RP, Golden A, Basri G, Doyle JG, Kao MM, Berdyugina SV, Kuznetsov A, Rupen MP, Antonova A. Magnetospherically driven optical and radio aurorae at the end of the stellar main sequence. Nature 2015. [PMID: 26223623 DOI: 10.1038/nature14619] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Aurorae are detected from all the magnetized planets in our Solar System, including Earth. They are powered by magnetospheric current systems that lead to the precipitation of energetic electrons into the high-latitude regions of the upper atmosphere. In the case of the gas-giant planets, these aurorae include highly polarized radio emission at kilohertz and megahertz frequencies produced by the precipitating electrons, as well as continuum and line emission in the infrared, optical, ultraviolet and X-ray parts of the spectrum, associated with the collisional excitation and heating of the hydrogen-dominated atmosphere. Here we report simultaneous radio and optical spectroscopic observations of an object at the end of the stellar main sequence, located right at the boundary between stars and brown dwarfs, from which we have detected radio and optical auroral emissions both powered by magnetospheric currents. Whereas the magnetic activity of stars like our Sun is powered by processes that occur in their lower atmospheres, these aurorae are powered by processes originating much further out in the magnetosphere of the dwarf star that couple energy into the lower atmosphere. The dissipated power is at least four orders of magnitude larger than what is produced in the Jovian magnetosphere, revealing aurorae to be a potentially ubiquitous signature of large-scale magnetospheres that can scale to luminosities far greater than those observed in our Solar System. These magnetospheric current systems may also play a part in powering some of the weather phenomena reported on brown dwarfs.
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Affiliation(s)
- G Hallinan
- California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
| | - S P Littlefair
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK
| | - G Cotter
- Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
| | - S Bourke
- California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
| | - L K Harding
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-0899, USA
| | - J S Pineda
- California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
| | - R P Butler
- Centre for Astronomy, National University of Ireland, Galway, University Road, Galway, Republic of Ireland
| | - A Golden
- Department of Mathematical Sciences, Yeshiva University, New York, New York 10033, USA
| | - G Basri
- Astronomy Department, University of California, Campbell Hall, Berkeley, California 94720, USA
| | - J G Doyle
- Armagh Observatory, College Hill, Armagh BT61 9DG, UK
| | - M M Kao
- California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA
| | - S V Berdyugina
- Kiepenheuer Institut für Sonnenphysik, Schöneckstrasse 6, D-79104 Freiburg, Germany
| | - A Kuznetsov
- Institute of Solar-Terrestrial Physics, Irkutsk 664033, Russia
| | - M P Rupen
- National Radio Astronomy Observatory, PO Box O, Socorro, New Mexico 87801, USA
| | - A Antonova
- Department of Astronomy, Faculty of Physics, St Kliment Ohridski University of Sofia, 5 James Bourchier Boulevard, 1164 Sofia, Bulgaria
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Golden A, Spicer D, Achterman R. Implementation of a Integrated Program in Human Biology. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.541.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A Golden
- School of Natural Health Arts and Sciences Bastyr UniversityKenmoreWA.United States
| | - Diane Spicer
- School of Natural Health Arts and Sciences Bastyr UniversityKenmoreWA.United States
| | - Rebecca Achterman
- School of Natural Health Arts and Sciences Bastyr UniversityKenmoreWA.United States
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11
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Ó Broin P, Hayde N, Bao Y, Ye B, Calder R, de Boccardo G, Lubetzky M, Ajaimy M, Pullman J, Colovai A, Akalin E, Golden A. A pathogenesis-based transcript signature in donor-specific antibody-positive kidney transplant patients with normal biopsies. Genom Data 2014; 2:357-60. [PMID: 26484130 PMCID: PMC4536051 DOI: 10.1016/j.gdata.2014.10.005] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 10/02/2014] [Accepted: 10/02/2014] [Indexed: 11/15/2022]
Abstract
Affymetrix Human Gene 1.0-ST arrays were used to assess the gene expression profiles of kidney transplant patients who presented with donor-specific antibodies (DSAs) but showed normal biopsy histopathology and did not develop antibody-mediated rejection (AMR). Biopsy and whole-blood profiles for these DSA-positive, AMR-negative (DSA +/AMR-) patients were compared to both DSA-positive, AMR-positive (DSA +/AMR +) patients as well as DSA-negative (DSA -) controls. While individual gene expression changes across sample groups were relatively subtle, gene-set enrichment analysis using previously identified pathogenesis-based transcripts (PBTs) identified a clear molecular signature involving increased rejection-associated transcripts in AMR - patients. Results from this study have been published in Kidney International (Hayde et al., 2014 [1]) and the associated data have been deposited in the GEO archive and are accessible via the following link: http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE50084.
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Affiliation(s)
- P. Ó Broin
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
- Corresponding author.
| | - N. Hayde
- Division of Pediatric Nephrology, University of Texas Health Science Center, Houston, TX, USA
| | - Y. Bao
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
| | - B. Ye
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - R.B. Calder
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - G. de Boccardo
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
- Division of Nephrology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - M. Lubetzky
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
- Division of Nephrology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - M. Ajaimy
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
- Division of Nephrology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - J. Pullman
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - A. Colovai
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
| | - E. Akalin
- Montefiore–Einstein Center for Transplantation, Montefiore Medical Center, The University Hospital for Albert Einstein College of Medicine, Bronx, NY, USA
| | - A. Golden
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Mathematical Sciences, Yeshiva University, New York, NY, USA
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Vaitheesvaran B, Hartil K, Navare A, Zheng, ÓBroin P, Golden A, Guha, Lee WN, Kurland I, Bruce JE. Role of the tumor suppressor IQGAP2 in metabolic homeostasis: Possible link between diabetes and cancer. Metabolomics 2014; 10:920-937. [PMID: 25254002 PMCID: PMC4169985 DOI: 10.1007/s11306-014-0639-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Deficiency of IQGAP2, a scaffolding protein expressed primarily in liver leads to rearrangements of hepatic protein compartmentalization and altered regulation of enzyme functions predisposing development of hepatocellular carcinoma and diabetes. Employing a systems approach with proteomics, metabolomics and fluxes characterizations, we examined the effects of IQGAP2 deficient proteomic changes on cellular metabolism and the overall metabolic phenotype. Iqgap2-/- mice demonstrated metabolic inflexibility, fasting hyperglycemia and obesity. Such phenotypic characteristics were associated with aberrant hepatic regulations of glycolysis/gluconeogenesis, glycogenolysis, lipid homeostasis and futile cycling corroborated with corresponding proteomic changes in cytosolic and mitochondrial compartments. IQGAP2 deficiency also led to truncated TCA-cycle, increased anaplerosis, increased supply of acetyl-CoA for de novo lipogenesis, and increased mitochondrial methyl-donor metabolism necessary for nucleotides synthesis. Our results suggest that changes in metabolic networks in IQGAP2 deficiency create a hepatic environment of a 'pre-diabetic' phenotype and a predisposition to non-alcoholic fatty liver disease (NAFLD) which has been linked to the development of hepatocellular carcinoma.
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Affiliation(s)
- B. Vaitheesvaran
- Department of Medicine, Diabetes Center, Stable Isotope and Metabolomics Core Facility, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - K. Hartil
- Department of Medicine, Diabetes Center, Stable Isotope and Metabolomics Core Facility, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - A. Navare
- Department of Genome Sciences, University of Washington, Seattle, Washington, 98109
| | - Zheng
- Department of Genome Sciences, University of Washington, Seattle, Washington, 98109
| | - P. ÓBroin
- Department of Medicine, Diabetes Center, Stable Isotope and Metabolomics Core Facility, Albert Einstein College of Medicine, Bronx, New York, 10461
- Department of Genetics., Division of Computational Genetics, Albert Einstein College of Medicine, Bronx, NewYork, 10461
| | - A. Golden
- Department of Genetics., Division of Computational Genetics, Albert Einstein College of Medicine, Bronx, NewYork, 10461
| | - Guha
- Department of Radiation Oncology, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - WN. Lee
- Department of Pediatrics, Division of Endocrinology and Metabolism, University of California, Los Angeles, California 90502
| | - I.J Kurland
- Department of Medicine, Diabetes Center, Stable Isotope and Metabolomics Core Facility, Albert Einstein College of Medicine, Bronx, New York, 10461
| | - J. E. Bruce
- Department of Genome Sciences, University of Washington, Seattle, Washington, 98109
- Corresponding author: James E. Bruce. Department of Genome Sciences, University of Washington, Seattle, Washington, 98109., , Phone: 206-543-0220, Fax: 206-616-0008
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Golden A, Davey K, Paschal G, Solis D, Haar R. 340 Socio-Economic Factors Associated With Repeat Emergency Department Visits. Ann Emerg Med 2014. [DOI: 10.1016/j.annemergmed.2014.07.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Kamal L, Broin PO, Bao Y, Golden A, Akalin E. Increased Intragraft Endothelial Cell and Interferon-gamma Associated Transcripts and Banff Chronic Allograft Glomerulopathy (cg) Score Predict the Graft Loss in Transplant Glomerulopathy. Transplantation 2014. [DOI: 10.1097/00007890-201407151-01558] [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: 11/25/2022]
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15
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Ajaimy M, OʼBrien P, Bao Y, Golden A, Akalin E. Effects of Prolonged Cold Ischemia On Intragraft Gene Expression Profiles. Transplantation 2014. [DOI: 10.1097/00007890-201407151-01978] [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: 11/25/2022]
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16
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Stone W, Ibanez L, Newschaffer C, Rohloff E, Abdullah M, Burkom D, Clarke N, Durkin M, Golden A, Kuo A, Lakes K, Lambert B, Landa R, Messinger D, Paterson S, Warren Z, Burbacher T, Faustman E. Streamlining the diagnosis of autism spectrum disorder for the National Children's Study. Neurotoxicol Teratol 2014. [DOI: 10.1016/j.ntt.2014.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Delio M, Patel K, Maslov A, Golden A, Greally J, Morrow B, Vijg J, Montagna C. Abstract P2-12-09: Developing clinical sequencing assays at Einstein-Montefiore. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-12-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The Department of Genetics in collaboration with a group of Montefiore's clinicians initiated the development of clinical sequencing tests with the final goal to incrementally build clinical sequencing assays to improve clinical care in the Bronx. The use of next generation sequencing is particularly relevant for cancer biology since the heterogeneity of cancer requires deep sequencing and high read depth, which prior to recent advances in technology was expensive and labor intensive.
We designed a custom gene panel for target sequencing using the Illumina HiSeq 2500 consisting of 650 genes for multiple disorders and diseases, including various cancers, in addition to rare and complex mendelian disorders. We sequenced 17 samples, including a tumor-normal breast cancer pair, where we identified a novel, pathogenic stop variant in the highly mutated TP53 tumor suppressor gene. In addition to our custom target panel, we sequenced this sample pair on two additional cancer panels (AmpliSeq Cancer Hotspot and the Comprehensive Cancer Panel using the Ion Torrent Technology) and performed Whole Exome Sequencing (WES) to ensure the sensitivity and specificity of our custom panel. This variant was detected on all platforms.
We found targeted capture high-throughput sequencing to be a cost effective, time sensitive and efficient approach in detecting pathogenic variants to aid diagnosis of individuals affected by cancer or mendelian disorders. We are currently receiving samples to sequence and plan to expand our program to various groups within the Einstein-Montefiore community. Using a personalized medicine approach we expect to detect biomarkers and prospective targets to develop an accurate and effective treatment plan for these individuals.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-12-09.
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Affiliation(s)
- M Delio
- Albert Einstein College of Medecine, Bronx, NY
| | - K Patel
- Albert Einstein College of Medecine, Bronx, NY
| | - A Maslov
- Albert Einstein College of Medecine, Bronx, NY
| | - A Golden
- Albert Einstein College of Medecine, Bronx, NY
| | - J Greally
- Albert Einstein College of Medecine, Bronx, NY
| | - B Morrow
- Albert Einstein College of Medecine, Bronx, NY
| | - J Vijg
- Albert Einstein College of Medecine, Bronx, NY
| | - C Montagna
- Albert Einstein College of Medecine, Bronx, NY
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18
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Geeleher P, Morris D, Hinde JP, Golden A. BioconductorBuntu: a Linux distribution that implements a web-based DNA microarray analysis server. Bioinformatics 2009; 25:1438-9. [DOI: 10.1093/bioinformatics/btp165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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19
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Hickam JB, Cargill WH, Golden A. CARDIOVASCULAR REACTIONS TO EMOTIONAL STIMULI. EFFECT ON THE CARDIAC OUTPUT, ARTERIOVENOUS OXYGEN DIFFERENCE, ARTERIAL PRESSURE, AND PERIPHERAL RESISTANCE. J Clin Invest 2006; 27:290-8. [PMID: 16695554 PMCID: PMC439504 DOI: 10.1172/jci101946] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- J B Hickam
- Department of Medicine, Duke University, Durham, North Carolina
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20
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Abstract
We describe the transcatheter closure of a patent ductus venosus in twin brothers with an ill-defined systemic illness and respiratory failure using the Amplatzer vascular plug. To our knowledge, this is the first description of the use of the Amplatzer vascular plug for ductus venosus closure.
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MESH Headings
- Angioplasty, Balloon
- Cardiac Catheterization
- Diseases in Twins/diagnostic imaging
- Diseases in Twins/surgery
- Ductus Arteriosus, Patent/diagnostic imaging
- Ductus Arteriosus, Patent/surgery
- Humans
- Infant
- Infant, Newborn
- Infant, Premature, Diseases/diagnostic imaging
- Infant, Premature, Diseases/surgery
- Male
- Portal Vein/abnormalities
- Portal Vein/surgery
- Prosthesis Implantation
- Radiography
- Surgical Instruments
- Vena Cava, Inferior/abnormalities
- Vena Cava, Inferior/surgery
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Affiliation(s)
- M J Gillespie
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, 2nd Floor Main Building, 34th and Civic Center Boulevard, Philadelphia, PA, 19104, USA.
| | - A Golden
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, 2nd Floor Main Building, 34th and Civic Center Boulevard, Philadelphia, PA, 19104, USA
| | - V B Sivarajan
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, 2nd Floor Main Building, 34th and Civic Center Boulevard, Philadelphia, PA, 19104, USA
| | - J J Rome
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, 2nd Floor Main Building, 34th and Civic Center Boulevard, Philadelphia, PA, 19104, USA
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21
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Abstract
We detected a correlation between optical and giant radio pulse emission from the Crab pulsar. Optical pulses coincident with the giant radio pulses were on average 3% brighter than those coincident with normal radio pulses. Combined with the lack of any other pulse profile changes, this result indicates that both the giant radio pulses and the increased optical emission are linked to an increase in the electron-positron plasma density.
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Affiliation(s)
- A Shearer
- National University of Ireland, Galway, Newcastle Road, Galway, Ireland.
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22
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Golden A, Hatcher BJ. Buckling up America: making a difference at the local level. Am J Public Health 2001; 91:1795-6. [PMID: 11684605 PMCID: PMC1446880 DOI: 10.2105/ajph.91.11.1795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- A Golden
- American Public Health Association, Washington, DC 2001, USA
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23
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Hu JJ, Smith TR, Miller MS, Mohrenweiser HW, Golden A, Case LD. Amino acid substitution variants of APE1 and XRCC1 genes associated with ionizing radiation sensitivity. Carcinogenesis 2001; 22:917-22. [PMID: 11375899 DOI: 10.1093/carcin/22.6.917] [Citation(s) in RCA: 228] [Impact Index Per Article: 9.9] [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: 01/03/2023] Open
Abstract
Although several variants of DNA repair genes have been identified, their functional significance has not been determined. Using samples collected from 135 cancer-free women, this study evaluated whether amino acid substitution variants of DNA repair genes contribute to ionizing radiation (IR) susceptibility as measured by prolonged cell cycle G2 delay. PCR-restriction fragment length polymorphism (RFLP) assays were used to determine four genotypes: X-ray repair cross complementing group 1 (XRCC1, exon 6, C/T, 194 Arg/Trp and exon 10, G/A, 399 Arg/Gln), XRCC group 3 (XRCC3, exon 7, C/T, 241 Thr/Met) and apurinic/apyrimidinic endonuclease 1 (APE1, exon 5, T/G, 148 Asp/Glu). Fluorescence-activated cell sorter (FACS) analysis was used to measure cell cycle delay. APE1 (exon 5) genotype was significantly associated with mitotic delay (P = 0.01), with the Glu/Glu genotype having prolonged delay compared with the other two genotypes. The mitotic delay index (mean +/- SD) in women with the APE1 codon 148 Asp/Asp, Asp/Glu and Glu/Glu genotypes was 30.95 +/- 10.15 (n = 49), 30.65 +/- 10.4 (n = 60) and 39.56 +/- 13.12 (n = 21), respectively. There was a significant interaction between family history (FH) and APE1 (exon 5) genotype (P = 0.007) as well as FH and XRCC1 (exon 10) genotype (P = 0.005) in mitotic delay. Lastly, prolonged cell cycle delay was significantly associated with number of variant alleles when APE1 Asp148Glu and XRCC1 Arg399Gln genotypes were evaluated in a four-level model (chi(2) for linear trend = 10.9; P = 0.001). These results suggest that amino acid substitution variants of XRCC1 and APE1 may contribute to IR hypersensitivity.
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Affiliation(s)
- J J Hu
- Department of Cancer Biology and Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
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24
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Calderón J, Navarro ME, Jimenez-Capdeville ME, Santos-Diaz MA, Golden A, Rodriguez-Leyva I, Borja-Aburto V, Díaz-Barriga F. Exposure to arsenic and lead and neuropsychological development in Mexican children. Environ Res 2001; 85:69-76. [PMID: 11161656 DOI: 10.1006/enrs.2000.4106] [Citation(s) in RCA: 277] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This cross-sectional study examined the effects of chronic exposure to lead (Pb), arsenic (AS) and undernutrition on the neuropsychological development of children. Two populations chronically exposed to either high (41 children) or low (39 children) levels of As and Pb were analyzed using the Wechsler Intelligence Scale for Children, Revised Version, for México (WISC-RM). Geometric means of urinary arsenic (AsU) and lead in blood (PbB) were 62.9+/-0.03 (microgAs/g creatinine) and 8.9+/-0.03 (microg/dl) for the exposed group and 40.2+/-0.03 (microgAs/g creatinine) and 9.7+/-0.02 (microg/dl) for the reference group. The height for age index (HAI) was used as an indicator of chronic malnutrition and sociodemographic information was obtained with a questionnaire. Lead and arsenic were measured by atomic absorption spectrophotometry. Data on full, verbal, and performance intelligence quotients (IQ) scores, long-term memory, linguistic abstraction, attention span, and visuospatial organization were obtained through the WISC-RM. After controlling for significant potential confounders verbal IQ (P<0.01) decreased with increasing concentrations of AsU. The HAI correlated positively with full-scale and performance IQ (P<0.01). Higher levels of AsU were significantly related to poorer performance on WISC-RM factors examining long-term memory and linguistic abstraction, while lower scores in WISC-RM factors measuring attention were obtained at increasing values of PbB. Our results suggest that exposure to As and chronic malnutrition could have an influence on verbal abilities and long-term memory, while Pb exposure could affect the attention process even at low levels.
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Affiliation(s)
- J Calderón
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, Av. Venustiano Carranza 2405, 78210 San Luis Potosi, México.
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25
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Greene L, Espe-Pfeifer P, Selden J, Mahrou M, Mleko A, Escalona A, Golden A. Correlation of the Geriatric Depression Scale with cognitive abilities. Arch Clin Neuropsychol 2000. [DOI: 10.1093/arclin/15.8.737a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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26
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Abstract
Early Caenorhabditis elegans embryos provide an excellent model for the study of developmental processes. Development can be studied by direct observation under the light microscope and can be perturbed using laser manipulations, drug inhibitor treatments, and genetic mutants. The first division of the C. elegans embryo is asymmetric, generating two daughter cells unequal in size and developmental fate. These distinct fates are generated by the partitioning of cytoplasmic determinants during the first mitotic cell cycle. Partitioning of these determinants is thought to be driven by cytoplasmic flow. Recent studies in C. elegans in the past year have identified a number of components necessary for this flow, giving us a clearer picture of the molecular mechanisms underlying developmental asymmetry.
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Affiliation(s)
- A Golden
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0840, USA.
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27
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Marcus M, McChesney R, Golden A, Landrigan P. Video display terminals and miscarriage. J Am Med Womens Assoc (1972) 2000; 55:84-8, 105. [PMID: 10808658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Concern about possible reproductive effects of using video display terminals (VDTs) was stimulated by reports of clusters of adverse pregnancy outcomes among groups of women who used VDTs. Exposure to electromagnetic fields emitted from VDTs was suspected of increasing the risk of miscarriage. Ten epidemiological studies have examined associations between VDT use and miscarriage, most of which were not originally designed to examine this hypothesis and suffer from methodological limitations. We review these studies and present previously unpublished data in support of our conclusion that for most women in modern offices, work with VDTs does not increase their exposure to electromagnetic fields or increase their risk of miscarriage. The miscarriage risk for women who work at high-stress jobs or with older, high-emission VDTs (ELF > 3 mG), however, is still uncertain.
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Affiliation(s)
- M Marcus
- Rollins School of Public Health, Emory University, Atlanta, Georgia 30322, USA
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28
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Winkler MA, Hickman RK, Golden A, Aboleneen H. Analysis of recombinant protein expression by MALDI-TOF mass spectrometry of bacterial colonies. Biotechniques 2000; 28:890-2, 894-5. [PMID: 10818694 DOI: 10.2144/00285st01] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/23/2022] Open
Abstract
E. coli expressing soluble recombinant HIV antigens were analyzed directly by MALDI-TOF mass spectrometry (MS) from bacterial colonies picked from agar plates. An HIV envelope (ENV) antigen construct, penvA, was expressed in E. coli by transformation of the plasmid pPL/penvA-M. The plasmid was co-transformed into E. coli DH5 alpha cells with an equal quantity of the plasmid pKRR826, the parent vector without the penvA insert, and plated at medium density on L-agar plus ampicillin plates. A total of 24 colonies from four agar plates (six colonies per plate) were picked and transferred into 50% acetonitrile--0.1% trifluoroacetic acid aliquots for analysis by MALDI-TOF MS. The MS analysis detected 10 of 24 colonies expressing the recombinant protein; one colony expressed a mutant penvA protein; eleven of 24 colonies showed ions only from E. coli; and two of 24 colonies showed no detectable proteins. When E. coli transformed only with plasmid pPL/penvA-M were examined, all (10 of 10) colonies showed the penv insert by the MALDI-TOF MS method. The method is fast (less than 1.5 h for 24 colonies) and allows identification of colonies expressing intact or mutant proteins directly from culture plates without sample purification.
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Affiliation(s)
- M A Winkler
- Dept. 90T, Abbott Laboratories, Abbott Park, IL 60064, USA.
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29
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Golden A, Roos BA, Silverman MA, Beber C. Nursing home 'abuse' litigation is instructive. Geriatrics (Basel) 2000; 55:11, 15-6. [PMID: 10711301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
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30
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Chase D, Serafinas C, Ashcroft N, Kosinski M, Longo D, Ferris DK, Golden A. The polo-like kinase PLK-1 is required for nuclear envelope breakdown and the completion of meiosis in Caenorhabditis elegans. Genesis 2000; 26:26-41. [PMID: 10660671 DOI: 10.1002/(sici)1526-968x(200001)26:1<26::aid-gene6>3.0.co;2-o] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Polo-like kinases are key regulatory molecules required during the cell cycle for the successful completion of mitosis. We have cloned a C. elegans homolog of the Drosophila melanogaster polo gene (designated plk-1 for C. elegans polo-like kinase-1) and present the subcellular localization of the PLK-1 protein during the meiotic and mitotic cell cycles in C. elegans oocytes and embryos, respectively. Disruption of PLK-1 expression by RNA-mediated interference (RNAi) disrupts normal oocyte and embryonic development. Inspection of oocytes revealed a defect in nuclear envelope breakdown (NEBD) before ovulation. This defect in NEBD was also observed in oocytes that were depleted of the cyclin-dependent kinase NCC-1 (C. elegans homolog of Cdc2). The plk-1 RNAi oocytes were fertilized; however the resulting embryos were unable to separate their meiotic chromosomes or form and extrude polar bodies. These defects led to embryonic arrest as single cells. genesis 26:26-41, 2000. Published 2000 Wiley-Liss, Inc.
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Affiliation(s)
- D Chase
- National Institute on Aging, National Cancer Institute-FCRF, Frederick, Maryland 21702, USA
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31
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Abstract
The Polo family of serine/threonine kinases have been implicated in cell cycle control in a number of diverse organisms. Their localization and biochemical activity suggest that they play an important role in centrosome maturation, G2-to-M phase progression, the promotion of anaphase, and cytokinesis. The Polo family of kinases is distinct from other serine/threonine kinases in that they all contain a polo-box sequence motif in their non-catalytic C-terminal domain. Recently, it was reported that two Polo-related kinases, Plc1 and Plc2, are present in C. elegans. Plc2 has diverged from Plc1 with poor homology within the polo-box sequence and only had 40% amino acid identity with Plc1. We report here the full-length cDNA sequence of another Polo-related kinase from C. elegans. The predicted protein product has greater than 70% amino acid identity with PLK-1/Plc1, and has a highly conserved polo-box domain.
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Affiliation(s)
- D Chase
- NIA, NCI-FCRF, Frederick, MD 21702, USA
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32
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Ferrer M, Sullivan BJ, Godbout KL, Burke E, Stump HS, Godoy J, Golden A, Profy AT, van Schravendijk MR. Structural and functional characterization of an epitope in the conserved C-terminal region of HIV-1 gp120. J Pept Res 1999; 54:32-42. [PMID: 10448968 DOI: 10.1034/j.1399-3011.1999.00082.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Through an integrated study of the reactivity of a monoclonal antibody, 803-15.6, with synthetic peptides and native recombinant HIV-1 envelope glycoprotein gp120, we have obtained structure-functional information on a region of rgp120 not yet elucidated by X-ray crystallography. mAb 803-15.6 binds with high affinity and broad cross-clade specificity to the conserved C-terminal region (amino acids 502-516) of HIV-1 rgp120. Phage display selection from a random peptide library identified the core binding motif as AXXKXRH, homologous to residues 502-508. Using quantitative binding analyses, the affinity of mAb 803-15.6 for native, monomeric recombinant gp120HXB2 (rgp120) was found to be similar to that for the synthetic gp120 peptide (502-516). Circular dichroism studies indicate that the synthetic peptide largely has a random coil conformation in solution. The results therefore suggest that the 803-15.6 epitope is fully accessible on rgp120 and that this region of rgp120 is as flexible as the synthetic peptide. Residues 502-504 are on the edge of a putative gp41 binding site that has been postulated to change conformation on CD4 binding. However, the affinity of mAb 803-15.6 for rgp120 is not affected by binding of CD4 and vice-versa. These results suggest either that the 502-504 region does not change conformation upon CD4 binding, or that recombinant gp120 does not undergo the same changes as occur in the native viral gp120-gp41 oligomer. The detailed characterization of the 803-15.6 epitope may be useful for further study of the role of the C5 region of gp120 in the viral attachment and fusion process.
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Affiliation(s)
- M Ferrer
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
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33
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Wilson MA, Hoch RV, Ashcroft NR, Kosinski ME, Golden A. A Caenorhabditis elegans wee1 homolog is expressed in a temporally and spatially restricted pattern during embryonic development. Biochim Biophys Acta 1999; 1445:99-109. [PMID: 10209262 DOI: 10.1016/s0167-4781(99)00027-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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
A wee1 homolog, wee-1.1, is expressed in both a temporally and spatially restricted pattern during early Caenorhabditis elegans embryogenesis, and is undetectable throughout the remainder of embryogenesis. The wee-1.1 message appears to be zygotically expressed in the somatic founder cell E of the 12-cell embryo. This expression disappears when the E blastomere divides for the first time. The wee-1.1 message then appears transiently in the nuclei of the eight great-granddaughter cells of the AB somatic founder cell, just before these cells divide in the 16-cell embryo. Following this division, the wee-1.1 mRNA is no longer detectable throughout the remainder of embryogenesis. The expression of wee-1.1 in the E blastomere and in the AB progeny appears to be restricted to nuclei in prophase and metaphase of the cell cycle. Analysis of the wee-1.1 mRNA expression pattern in maternal-effect lethal mutants suggests that this expression pattern is restricted to cells of the E and AB fates in the early embryo. This mRNA expression pattern is restricted to a 10-15-min span of embryonic development and may be regulating the timing of crucial cell divisions at this early stage of development.
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Affiliation(s)
- M A Wilson
- Gene Regulation and Chromosome Biology Laboratory, ABL-Basic Research Program, National Cancer Institute - Frederick Cancer Research and Development Center, P.O. Box B, Building 539, Frederick, MD 21702-1201, USA
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Ashcroft NR, Srayko M, Kosinski ME, Mains PE, Golden A. RNA-Mediated interference of a cdc25 homolog in Caenorhabditis elegans results in defects in the embryonic cortical membrane, meiosis, and mitosis. Dev Biol 1999; 206:15-32. [PMID: 9918692 DOI: 10.1006/dbio.1998.9135] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [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: 11/22/2022]
Abstract
The CDC25 dual-specificity phosphatase family has been shown to play a key role in cell cycle regulation. The phosphatase activity of CDC25 drives the cell cycle by removing inhibitory phosphates from cyclin-dependent kinase/cyclin complexes. Although the regulation of CDC25 phosphatase activity has been elucidated both biochemically and genetically in other systems, the role of this enzyme during development is not well understood. To examine the expression pattern and function of CDC25 in Caenorhabditis elegans, we characterized a cdc25 homolog, cdc-25.1, during early embryonic development. The CDC-25.1 protein localizes to oocytes, embryonic nuclei, and embryonic cortical membranes. When the expression of CDC-25.1 was disrupted by RNA-mediated interference, the anterior cortical membrane of fertilized eggs became very fluid during meiosis and subsequent mitotic cell cycles. Mispositioning of the meiotic spindle, defects in polar body extrusion and chromosome segregation, and abnormal cleavage furrows were also observed. We conclude that CDC-25.1 is required for a very early developmental process-the proper completion of meiosis prior to embryogenesis.
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Affiliation(s)
- N R Ashcroft
- Developmental Signal Transduction Group, Gene Regulation and Chromosome Biology Laboratory, ABL-Basic Research Program, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, Maryland, 21702, USA
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35
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Ripley D, Golden A, Fahs MC, Dottino P. The impact of laparoscopic surgery in the management of adnexal masses. Mt Sinai J Med 1999; 66:31-4. [PMID: 9989103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
The objective of this study is to evaluate the clinical aspects of laparoscopic management of adnexal masses. The feasibility of this approach has been demonstrated, but the safe and effective use of laparoscopy for this indication requires training, technical skills and experience on the part of the laparoscopist. If used appropriately, many patients will benefit from minimally-invasive surgery. We compared clinical factors of patients having laparoscopy to those having laparotomy in a case-control study of 30 patients with adnexal masses. Oophorectomy or ovarian cystectomy was performed by laparoscopy for 20 women and by laparotomy for 10 women. Comparing the 2 groups, the most significant difference was the decrease in length of hospital stay in the laparoscopy group. There were no significant differences in operative time or intraoperative complications. Estimated blood loss was lower in the laparoscopy group, and no intraoperative complications occurred. No patient required conversion from laparoscopy to laparotomy. All patients had benign disease despite the inclusion of patients with risk factors for ovarian carcinoma. This study clearly demonstrates the clinical benefits of laparoscopic management of adnexal masses treated with oophorectomy or ovarian cystectomy.
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Affiliation(s)
- D Ripley
- Department of Obstetrics, Mount Sinai School of Medicine, New York, NY, USA
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36
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Schumacher JM, Golden A, Donovan PJ. AIR-2: An Aurora/Ipl1-related protein kinase associated with chromosomes and midbody microtubules is required for polar body extrusion and cytokinesis in Caenorhabditis elegans embryos. J Cell Biol 1998; 143:1635-46. [PMID: 9852156 PMCID: PMC2132979 DOI: 10.1083/jcb.143.6.1635] [Citation(s) in RCA: 264] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
An emerging family of kinases related to the Drosophila Aurora and budding yeast Ipl1 proteins has been implicated in chromosome segregation and mitotic spindle formation in a number of organisms. Unlike other Aurora/Ipl1-related kinases, the Caenorhabditis elegans orthologue, AIR-2, is associated with meiotic and mitotic chromosomes. AIR-2 is initially localized to the chromosomes of the most mature prophase I-arrested oocyte residing next to the spermatheca. This localization is dependent on the presence of sperm in the spermatheca. After fertilization, AIR-2 remains associated with chromosomes during each meiotic division. However, during both meiotic anaphases, AIR-2 is present between the separating chromosomes. AIR-2 also remains associated with both extruded polar bodies. In the embryo, AIR-2 is found on metaphase chromosomes, moves to midbody microtubules at anaphase, and then persists at the cytokinesis remnant. Disruption of AIR-2 expression by RNA- mediated interference produces entire broods of one-cell embryos that have executed multiple cell cycles in the complete absence of cytokinesis. The embryos accumulate large amounts of DNA and microtubule asters. Polar bodies are not extruded, but remain in the embryo where they continue to replicate. The cytokinesis defect appears to be late in the cell cycle because transient cleavage furrows initiate at the proper location, but regress before the division is complete. Additionally, staining with a marker of midbody microtubules revealed that at least some of the components of the midbody are not well localized in the absence of AIR-2 activity. Our results suggest that during each meiotic and mitotic division, AIR-2 may coordinate the congression of metaphase chromosomes with the subsequent events of polar body extrusion and cytokinesis.
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Affiliation(s)
- J M Schumacher
- Cell Biology of Development and Differentiation Group, ABL-Basic Research Program, NCI-Frederick Cancer Research and Development Center, Frederick, Maryland 21702, USA
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37
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Schumacher JM, Ashcroft N, Donovan PJ, Golden A. A highly conserved centrosomal kinase, AIR-1, is required for accurate cell cycle progression and segregation of developmental factors in Caenorhabditis elegans embryos. Development 1998; 125:4391-402. [PMID: 9778499 DOI: 10.1242/dev.125.22.4391] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.2] [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: 11/20/2022]
Abstract
S. cerevisiae Ipl1, Drosophila Aurora, and the mammalian centrosomal protein IAK-1 define a new subfamily of serine/threonine kinases that regulate chromosome segregation and mitotic spindle dynamics. Mutations in ipl1 and aurora result in the generation of severely aneuploid cells and, in the case of aurora, monopolar spindles arising from a failure in centrosome separation. Here we show that a related, essential protein from C. elegans, AIR-1 (Aurora/Ipl1 related), is localized to mitotic centrosomes. Disruption of AIR-1 protein expression in C. elegans embryos results in severe aneuploidy and embryonic lethality. Unlike aurora mutants, this aneuploidy does not arise from a failure in centrosome separation. Bipolar spindles are formed in the absence of AIR-1, but they appear to be disorganized and are nucleated by abnormal-looking centrosomes. In addition to its requirement during mitosis, AIR-1 may regulate microtubule-based developmental processes as well. Our data suggests AIR-1 plays a role in P-granule segregation and the association of the germline factor PIE-1 with centrosomes.
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Affiliation(s)
- J M Schumacher
- Cell Biology of Development and Differentiation Group, Developmental Signal Transduction Group, ABL-Basic Research Program, National Cancer Institute-Frederick Cancer Research and Development Center, PO Box B, Frederick, MD 21702, USA
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Golden A, Austen DA, van Schravendijk MR, Sullivan BJ, Kawasaki ES, Osburne MS. Effect of promoters and signal sequences on the production of secreted HIV-1 gp120 protein in the baculovirus system. Protein Expr Purif 1998; 14:8-12. [PMID: 9758745 DOI: 10.1006/prep.1998.0926] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We compared insect cell production levels of secreted HIV-1 gp120 glycoprotein encoded by five different baculovirus expression constructs. Combinations consisting of one of two baculovirus promoters (very late or hybrid late/very late) and one of three different signal sequences [human tissue plasminogen activator (tpa), human placental alkaline phosphatase (pap), or baculovirus envelope glycoprotein (gp67)] were constructed. Production of secreted gp120 from these constructs was analyzed in two enzyme-linked immunosorbent assay formats, one detecting the total amount of secreted gp120 protein and the other measuring the level of "active" gp120 (as defined by the ability to bind to CD4). We found that for all of the constructs, approximately 50 to 90% of the secreted gp120 protein was active. Furthermore, our results indicated that expression from either promoter yielded comparable production of secreted protein, despite the fact that transcription from the hybrid promoter begins at an earlier time. By contrast, the signal sequence had a much greater effect on the levels of secreted gp120: the tpa leader yielded the highest level of secreted protein, followed by the gp67 and pap sequences. This result suggests that transcription is not a limiting factor in the production of secreted gp120, but rather that downstream processing of the protein is more critical. Furthermore, these results confirm the notion that the "optimal" signal sequence is protein dependent and that an insect-derived signal sequence is not optimal in all cases.
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Affiliation(s)
- A Golden
- Procept, Inc., 840 Memorial Drive, Cambridge, Massachusetts, 02139, USA
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39
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Abstract
During eukaryotic evolution, multicellular organisms have evolved multiple members of gene families that may display unique, partially overlapping, or redundant functions during development. More than 75% of the C. elegans genome has been sequenced, which represents approximately 95% of the coding sequences. This provides a unique opportunity to identify most, if not all, of the members of a given gene family. We have searched the C. elegans genome database for members of a key family of cell cycle regulators, the CDC25 phosphatases, and have identified four genes. The four C. elegans genes represent a larger family within a single organism than has been reported so far in Drosophila, mice and humans. An amino acid comparison revealed a high degree of similarity and identity within the phosphatase domain. This analysis also identified an expanded consensus sequence that can be used to discover new members of the CDC25 phosphatase family. However, the four C. elegans sequences display a few novel amino acid substitutions in the residues surrounding the invariant catalytic motif CX5R. These data demonstrate the value of genome database searching for identifying new members of known gene families, understanding genetic diversity, and for studying gene structure.
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Affiliation(s)
- N R Ashcroft
- ABL-Basic Research Program, Gene Regulation, Chromosome Biology Laboratory, PO Box B, Building 539, National Cancer Institute-Frederick Cancer Research, Development Center, Frederick, MD 21702, USA
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40
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Hackett J, Hoff-Velk J, Golden A, Brashear J, Robinson J, Rapp M, Klass M, Ostrow DH, Mandecki W. Recombinant mouse-human chimeric antibodies as calibrators in immunoassays that measure antibodies to Toxoplasma gondii. J Clin Microbiol 1998; 36:1277-84. [PMID: 9574691 PMCID: PMC104814 DOI: 10.1128/jcm.36.5.1277-1284.1998] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [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: 02/07/2023] Open
Abstract
In the present study, we examined the feasibility of using recombinant antibodies containing murine variable regions and human constant regions as calibrators or controls in immunoassays. As a model system, we chose the Abbott IMx Toxo immunoglobulin M (IgM) and Toxo IgG assays designed to detect antibodies to Toxoplasma gondii. Two mouse monoclonal antibodies were selected based on their reactivity to the T. gondii antigens P30 and P66. Heavy- and light-chain variable-region genes were cloned from both hybridomas and transferred into immunoglobulin expression vectors containing human kappa and IgG1 or IgM constant regions. The constructs were stably transfected into Sp2/0-Ag14 cells. In the IMx Toxo IgG assay, immunoreactivity of the anti-P30 chimeric IgG1 antibody paralleled that of the positive human plasma-derived assay calibrators. Signal generated with the anti-P66 chimeric IgG1 antibody was observed to plateau below the maximal reactivity observed for the assay calibrator. Examination of the IgM chimeric antibodies in the IMx Toxo IgM assay revealed that both the anti-P30 and anti-P66 antibodies matched the assay index calibrator manufactured with human Toxo IgM-positive plasma. When evaluated with patient samples, the correlation between results obtained with the chimeric antibody calibrators and the positive human plasma calibrators was > or =0.985. These data demonstrate that chimeric mouse-human antibodies are a viable alternative to high-titer positive human plasma for the manufacture of calibrators and controls for diagnostic assays.
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Affiliation(s)
- J Hackett
- Abbott Diagnostics Division, Abbott Laboratories, North Chicago, Illinois 60064, USA.
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Hickman RK, Vallari A, Golden A, Lund J, Hackett J, Brennan C, Devare S. Detection and differentiation of HIV-1 group O sera from HIV-1 group M and HIV-2 using recombinant antigens and peptides. J Virol Methods 1998; 72:43-9. [PMID: 9672131 DOI: 10.1016/s0166-0934(98)00017-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Recombinant antigens and peptides were used to develop an HIV slot immunoblot assay to confirm and differentiate infection by HIV-1 group M, HIV-1 group O or HIV-2. Recombinant antigens from the gag, pol or env regions of HIV-1 and HIV-2, in addition to synthetic peptides from the immunodominant region (IDR) of transmembrane proteins gp41 (HIV-1) or gp36 (HIV-2), were blotted on nitrocellulose strips and used as a substitute for competitive Western blots. Evaluation of a large number of samples (N = 440) from various regions of the world, using the immunoblot, showed effective differentiation of HIV-1 group M, HIV-1 group O and HIV-2. The immunoblot identified correctly all (24/24) HIV-1 group O samples that were confirmed subsequently by PCR and sequence analysis. The immunoblot is a useful tool for identifying HIV-1 group O seropositive samples and has the potential to identify other serological HIV variants that may represent detection problems for HIV screening assays using HIV-1 group M subtype B reagents.
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Affiliation(s)
- R K Hickman
- AIDS Research and Retrovirus Discovery, Department 9NG, Abbott Laboratories, N. Chicago, IL 60064, USA
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Brennan CA, Lund JK, Golden A, Yamaguchi J, Vallari AS, Phillips JF, Kataaha PK, Jackson JB, Devare SG. Serologic and phylogenetic characterization of HIV-1 subtypes in Uganda. AIDS 1997; 11:1823-32. [PMID: 9412700 DOI: 10.1097/00002030-199715000-00006] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To determine the HIV genetic subtypes present in HIV-1-infected asymptomatic blood donors in Uganda and to evaluate serologic detection of infection by commercial immunoassays; to evaluate samples for HIV-1 group O infections. METHODS Sixty-four HIV-seropositive plasma samples were collected from the Nakasero Blood Bank, Kampala, Uganda. The plasma were evaluated using commercial HIV enzyme immunoassays (EIA) and a research immunoblot. HIV-1 group M and O infections were identified on the basis of discordant seroreactivity in EIA and reactivity to group M and O antigens on the immunoblot. Regions of gag p24 and env gp41 were amplified using reverse transcriptase polymerase chain reaction, and genetic subtypes were determined by phylogenetic analysis. RESULTS Serologic testing confirmed that 63 out of 64 plasma units were positive for HIV-1 group M infection and showed no evidence of HIV-1 group O infections. Genetic subtyping determined that 25 samples were subtype A, three subtype C, 22 subtype D, and nine were heterogeneous for subtypes A and D. CONCLUSIONS Despite the sequence variation observed in Uganda, commercial EIA based on HIV-1 subtype B proteins detected all the infections. In contrast, a peptide-based assay failed to detect three infections by subtype D viruses. This emphasizes the negative impact of HIV genetic variation on assays that rely on peptides to detect HIV infections. The number of infections with heterogeneous subtype (due to mixed infections or recombinant viruses) is high and reflects the growing complexity of the HIV epidemic in endemic regions where multiple subtypes are present in the population.
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Affiliation(s)
- C A Brennan
- Abbott Laboratories, North Chicago, Illinois 60064, USA
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Golden A, Khandekar SS, Osburne MS, Kawasaki E, Reinherz EL, Grossman TH. High-level production of a secreted, heterodimeric alpha beta murine T-cell receptor in Escherichia coli. J Immunol Methods 1997; 206:163-9. [PMID: 9328579 DOI: 10.1016/s0022-1759(97)00106-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 02/05/2023]
Abstract
For structural studies, high-level production of properly folded, disulfide-linked, unglycosylated protein in E. coli is an attractive alternative to production in eukaryotic systems. We describe here the production of heterodimeric, murine D10 T-cell receptor (sD10TCR) in E. coli as a secreted leucine zipper (LZ) fusion protein. Two genes, one (alpha-acid) encoding the alpha-chain variable and constant domains (V alpha and C alpha) of D10 TCR fused to an LZ 'acid' encoding sequence and the other (beta-base) encoding the beta-chain variable and constant domains (V beta and C beta) fused to an LZ 'base' encoding sequence, were co-expressed from a bacteriophage T7 promoter as a dicistronic message. Secreted alpha-acid and beta-base proteins formed proper inter- and intra-chain disulfide bonds in the periplasm, bypassing the need for in vitro protein refolding. Complementary LZ sequences facilitated the formation of alpha beta heterodimers. sD10TCR-LZ was purified by affinity chromotography using a D10 TCR clonotype-specific monoclonal antibody (mAb 3D3). Typical yields of purified protein were 4-5 mg/l of culture. Purified sD10TCR-LZ was reactive with a panel of conformationally sensitive TCR-specific monoclonal antibodies, consistent with its conformational integrity and appeared to be suitable for structural studies by X-ray crystallography or NMR spectroscopy.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/chemistry
- Antigen-Antibody Reactions
- Dimerization
- Escherichia coli/genetics
- Escherichia coli/immunology
- Leucine Zippers/genetics
- Leucine Zippers/immunology
- Mice
- Molecular Sequence Data
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/chemistry
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- Recombinant Fusion Proteins/biosynthesis
- Recombinant Fusion Proteins/immunology
- Recombinant Fusion Proteins/isolation & purification
- Recombinant Fusion Proteins/metabolism
- Solubility
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Affiliation(s)
- A Golden
- Procept Inc., Cambridge, MA 02139, USA
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Grihalde ND, Chen YC, Golden A, Gubbins E, Mandecki W. Epitope mapping of anti-HIV and anti-HCV monoclonal antibodies and characterization of epitope mimics using a filamentous phage peptide library. Gene X 1995; 166:187-95. [PMID: 8543161 DOI: 10.1016/0378-1119(95)00658-3] [Citation(s) in RCA: 19] [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: 01/31/2023] Open
Abstract
A large filamentous phage library (1 x 10(9) clones) displaying random 30-amino-acid (aa) sequences on the N terminus of the pIII coat protein was constructed and characterized. Clones in the library were affinity selected for binding to monoclonal antibodies (mAb) against two viral antigens, the HIV gp120 protein and the HCV core protein. The obtained aa sequences precisely identified the epitopes recognized by the mAb. Binding of peptide-carrying phages to the Ab was demonstrated by ELISA, Western blot and the surface plasmon resonance (SPR) method. The mAb-specific peptides were transferred via genetic techniques onto the N terminus of Escherichia coli alkaline phosphatase (AP). When fused to the enzyme, the peptides maintained their ability to bind their respective mAb, indicating that the peptides contained the necessary contact residues for binding. The affinity of the peptides was estimated to be 100 nM by SPR. A comparison is presented of the relative affinities of phage-derived peptides to the native viral epitopes also displayed on the AP scaffold. The approach of transferring epitopes from phage to AP for further evaluation should be applicable to many other mAb or receptors.
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Affiliation(s)
- N D Grihalde
- Aging and Degenerative Disease Department, Abbott Laboratories, North Chicago, IL 60064, USA
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45
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Sternberg PW, Yoon CH, Lee J, Jongeward GD, Kayne PS, Katz WS, Lesa G, Liu J, Golden A, Huang LS. Molecular genetics of proto-oncogenes and candidate tumor suppressors in Caenorhabditis elegans. Cold Spring Harb Symp Quant Biol 1994; 59:155-63. [PMID: 7587065 DOI: 10.1101/sqb.1994.059.01.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- P W Sternberg
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena 91125, USA
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46
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Marcus M, Golden A. Re: "Magnetic fields of video display terminals and spontaneous abortion". Am J Epidemiol 1993; 138:902-3; author reply 903-5. [PMID: 8237976 DOI: 10.1093/oxfordjournals.aje.a116801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Moller JH, Allen HD, Clark EB, Dajani AS, Golden A, Hayman LL, Lauer RM, Marmer EL, McAnulty JH, Oparil S. Report of the task force on children and youth. American Heart Association. Circulation 1993; 88:2479-86. [PMID: 8222143 DOI: 10.1161/01.cir.88.5.2479] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J H Moller
- Office of Scientific Affairs, American Heart Association, Dallas, TX 75231-4596
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48
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Abstract
During Caenorhabditis elegans vulval induction, multipotent precursors respond to an inductive signal by generating vulval cells as opposed to non-specialized epidermal cells. Both classical and 'reverse' genetic approaches have revealed that a cascade of nematode homologues of mammalian proto-oncogenes is necessary for induction of the vulva. The inductive signal is a growth factor encoded by the lin-3 gene and its candidate receptor is a tyrosine kinase encoded by the let-23 gene. let-23 acts via a Ras protein encoded by the let-60 gene. A nematode homologue of mammalian raf family protein serine/threonine kinases has been cloned and found to be encoded by the lin-45 gene. Dominant negative lin-45 raf mutants prevent vulval induction. A recessive lin-45 raf mutation prevents the excessive vulval differentiation caused by activated ras, indicating that raf might act downstream of ras during vulval induction.
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Affiliation(s)
- P W Sternberg
- Division of Biology, California Institute of Technology, Pasadena 91125
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49
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Abstract
Vulval differentiation in Caenorhabditis elegans is controlled by intercellular signalling mediated by a receptor tyrosine kinase and a ras gene product. The lin-45 gene encodes a homologue of the raf family of serine/threonine kinases and is necessary for vulval differentiation. The lin-45 raf gene product appears to act downstream of the ras protein in this pathway. A proto-oncogene-mediated signalling pathway may be a common feature of metazoan development.
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Affiliation(s)
- M Han
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder 80309-0347
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50
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Golden A, Benedict M, Shearn A, Kimura N, Leone A, Liotta LA, Steeg PS. Nucleoside diphosphate kinases, nm23, and tumor metastasis: Possible biochemical mechanisms. Cancer Treat Res 1993; 63:345-58. [PMID: 1363366 DOI: 10.1007/978-1-4615-3088-6_18] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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