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Borbye-Lorenzen N, Deza-Lougovski YI, Holmgaard S, Weiss LM, Bækvad-Hansen M, Skogstrand K, Rieckmann A, Börsch-Supan A, Börsch-Supan M. Assessment of circulating apoE4 levels from dried blood spot samples in a large survey setting. Alzheimers Dement (Amst) 2024; 16:e12555. [PMID: 38390562 PMCID: PMC10883237 DOI: 10.1002/dad2.12555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 12/11/2023] [Accepted: 01/16/2024] [Indexed: 02/24/2024]
Abstract
INTRODUCTION The apolipoprotein E (APOE) ε4 allele is associated with high risk for Alzheimer's disease. It is unclear whether individual levels of the circulating apoE4 protein in ε4 carriers confer additional risk. Measuring apoE4 protein levels from dried blood spots (DBS) has the potential to provide information on genetic status as well as circulating levels and to include these measures in large survey settings. METHODS We developed a multiplex immunoassay to detect apoE4 protein levels in DBS from 15,974 participants, aged 50+ from Wave 6 of the Survey of Health, Ageing and Retirement in Europe (SHARE). RESULTS The apoE4 protein signal was presented in two separable distributions. One distribution corresponded to carriers of at least one copy of the ε4 allele. Fieldwork cofounders affected protein levels but did not explain individual differences. DISCUSSION Future research should investigate how genotype and apoE4 level interact with lifestyle and other variables to impact cognitive aging.
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Affiliation(s)
- Nis Borbye-Lorenzen
- Department of Congenital Disorders Center for Neonatal Screening, Statens Serum Institut Copenhagen Denmark
| | - Yacila I Deza-Lougovski
- Institute of Psychology University of the Bundeswehr München Neubiberg Germany
- Max Planck Institute for Social Law and Social Policy Munich Germany
| | - Solveig Holmgaard
- Department of Congenital Disorders Center for Neonatal Screening, Statens Serum Institut Copenhagen Denmark
| | - Luzia M Weiss
- Max Planck Institute for Social Law and Social Policy Munich Germany
| | - Marie Bækvad-Hansen
- Department of Congenital Disorders Center for Neonatal Screening, Statens Serum Institut Copenhagen Denmark
| | - Kristin Skogstrand
- Department of Congenital Disorders Center for Neonatal Screening, Statens Serum Institut Copenhagen Denmark
| | - Anna Rieckmann
- Institute of Psychology University of the Bundeswehr München Neubiberg Germany
- Max Planck Institute for Social Law and Social Policy Munich Germany
| | - Axel Börsch-Supan
- Max Planck Institute for Social Law and Social Policy Munich Germany
- The Munich Research Institute for the Economics of Aging and SHARE Analyses (MEA) Munich Germany
- National Bureau of Economic Research Cambridge Massachusetts USA
| | - Martina Börsch-Supan
- The Munich Research Institute for the Economics of Aging and SHARE Analyses (MEA) Munich Germany
- Survey of Health, Ageing and Retirement in Europe (SHARE Biomarker Project) Munich Germany
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Groh R, Weiss LM, Börsch-Supan M, Börsch-Supan A. Effects of spot size on biomarker levels of field-collected dried blood spots: A new algorithm for exact dried blood spot size measurement. Am J Hum Biol 2022; 34:e23777. [PMID: 36001479 PMCID: PMC9606603 DOI: 10.1002/ajhb.23777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 05/24/2022] [Accepted: 06/03/2022] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES The quality of blood values analyzed from survey-collected dried blood spot (DBS) samples is affected by fieldwork conditions, particularly spot size. We offer an image-based algorithm that accurately measures the area of field-collected DBS and we investigate the impact of spot size on the analyzed blood marker values. METHODS SHARE, a pan-European study, collected 24 000 DBS samples in 12 countries in its sixth wave. Our new algorithm uses photographs of the DBS samples to calculate the number of pixels of the blood-covered area to measure the spot sizes accurately. We ran regression models to examine the association of spot size and seven DBS analytes. We then compared the application of our new spot-size measures to common spot-size estimation. RESULTS Using automated spot-size measurement, we found that spot size has a significant effect on all markers. Smaller spots are associated with lower measured levels, except for HbA1c, for which we observe a negative effect. Our precisely measured spot sizes explain substantially more variance of DBS analytes compared to commonly used spot-size estimation. CONCLUSION The new algorithm accurately measures the size of field-collected DBS in an automated way. This methodology can be applied to surveys even with very large numbers of observations. The measured spot sizes improve the accuracy of conversion formulae that translate blood marker values derived from DBS into venous blood values. The significance of the spot-size effects on biomarkers in DBS should also incentivize the improvement of fieldwork training and monitoring.
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Affiliation(s)
- Rebecca Groh
- Technical University of Munich, Munich, Germany
- Munich Center for the Economics of Aging at the Max Planck Institute for Social Law and Social Policy, Munich, Germany
| | - Luzia M. Weiss
- Munich Center for the Economics of Aging at the Max Planck Institute for Social Law and Social Policy, Munich, Germany
| | | | - Axel Börsch-Supan
- Technical University of Munich, Munich, Germany
- Munich Center for the Economics of Aging at the Max Planck Institute for Social Law and Social Policy, Munich, Germany
- Survey of Health, Ageing and Retirement in Europe, Munich, Germany
- National Bureau of Economic Research, Cambridge, Massachusetts
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Börsch-Supan A, Weiss LM, Börsch-Supan M, Potter AJ, Cofferen J, Kerschner E. Dried blood spot collection, sample quality, and fieldwork conditions: Structural validations for conversion into standard values. Am J Hum Biol 2021; 33:e23517. [PMID: 33063418 PMCID: PMC10980534 DOI: 10.1002/ajhb.23517] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES SHARE, a pan-European panel study in 27 European countries and Israel, has collected dried blood spot (DBS) samples from approximately 27 000 respondents in 13 countries. We aim to obtain factors to convert analyte values between DBS and venous blood samples (VBS) taking account of adverse fieldwork conditions such as small spot size, high temperature and humidity, short drying time and long shipment times. METHODS We obtained VBS and DBS from a set of 20 donors in a laboratory setting, and treated the DBS in a systematic and controlled fashion simulating SHARE fieldwork conditions. We used the 3420 outcomes to estimate from DBS analyte values the values that we would have obtained had it been feasible to collect and analyze the donors' venous blood samples. RESULTS The influence of field conditions and sample quality on DBS analyte values is significant and differs among assays. Varying spot size is the main challenge and affects all markers except HbA1c. Smaller spots lead to overly high measured levels. A missing desiccant is detrimental for all markers except CRP and tHb. The temperature to which the samples are exposed plays a significant role for HDL and CysC, while too brief a drying time affects CRP and CysC. Lab-based adjustment formulae only accounting for the differences between re-liquefied DBS and venous blood do not address these fieldwork conditions. CONCLUSIONS By simulating adverse fieldwork conditions in the lab, we were able to validate DBS collected under such conditions and established conversion formulae with high prediction accuracy.
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Affiliation(s)
- Axel Börsch-Supan
- Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy, Munich, Germany
- Department of Economics and Business, Technical University of Munich (TUM), Munich, Germany
- National Bureau of Economic Research (NBER), Cambridge, Massachusetts
| | - Luzia M. Weiss
- Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy, Munich, Germany
| | - Martina Börsch-Supan
- Survey of Health, Aging and Retirement in Europe (SHARE Biomarker Project), Munich, Germany
| | - Alan J. Potter
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Jake Cofferen
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Elizabeth Kerschner
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
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Abstract
Preservation of cognitive function is one of the major concerns in contemporary ageing societies. At the same time, overweight and obesity, which have been identified as risk factors for poor health development, have been increasing in many countries all over the world. This study examines the relationship between bodyweight change and cognitive decline in old age and it aims to determine whether and how changes in body mass index (BMI) affect the development of cognitive functioning in old age. Using longitudinal data from the Survey of Health, Ageing and Retirement in Europe (SHARE), covering four waves between 2006 and 2016 with 58,389 participants from 15 countries aged 50+, we estimated asymmetric fixed effects models by gender, adding possible confounding variables such as age, grip strength, health conditions, and physical activity. Additionally, we investigated possible heterogeneity in the BMI-cognition relation. We found a positive association between BMI change and change in cognitive performance, which was dominantly driven by BMI decrease. Weight loss was typically negatively related to cognition, particularly at low levels of BMI and mainly due to health conditions affecting both bodyweight and cognitive performance. Weight gain was, on average, not significantly related to cognitive performance; only respondents with preceding weight loss profited from small increases in BMI. Our analyses provide no support for an “obesity paradox” in cognition, according to which higher weight preserves cognition in old age. The association between weight change and cognitive performance in older age is based on weight changes being related to illness and recovery.
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Affiliation(s)
- Judith M. Kronschnabl
- Munich Center for the Economics of Aging (MEA), Max Planck Institute for Social Law and Social Policy, Munich, Germany
- * E-mail:
| | - Thorsten Kneip
- Munich Center for the Economics of Aging (MEA), Max Planck Institute for Social Law and Social Policy, Munich, Germany
| | - Luzia M. Weiss
- Munich Center for the Economics of Aging (MEA), Max Planck Institute for Social Law and Social Policy, Munich, Germany
| | - Michael Bergmann
- Munich Center for the Economics of Aging (MEA), Max Planck Institute for Social Law and Social Policy, Munich, Germany
- Technical University of Munich (TUM), Chair for the Economics of Aging, Munich, Germany
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Stentiford GD, Becnel JJ, Weiss LM, Keeling PJ, Didier ES, Williams BAP, Bjornson S, Kent ML, Freeman MA, Brown MJF, Troemel ER, Roesel K, Sokolova Y, Snowden KF, Solter L. Microsporidia - Emergent Pathogens in the Global Food Chain. Trends Parasitol 2016; 32:336-348. [PMID: 26796229 PMCID: PMC4818719 DOI: 10.1016/j.pt.2015.12.004] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/26/2015] [Accepted: 12/07/2015] [Indexed: 02/07/2023]
Abstract
Intensification of food production has the potential to drive increased disease prevalence in food plants and animals. Microsporidia are diversely distributed, opportunistic, and density-dependent parasites infecting hosts from almost all known animal taxa. They are frequent in highly managed aquatic and terrestrial hosts, many of which are vulnerable to epizootics, and all of which are crucial for the stability of the animal-human food chain. Mass rearing and changes in global climate may exacerbate disease and more efficient transmission of parasites in stressed or immune-deficient hosts. Further, human microsporidiosis appears to be adventitious and primarily associated with an increasing community of immune-deficient individuals. Taken together, strong evidence exists for an increasing prevalence of microsporidiosis in animals and humans, and for sharing of pathogens across hosts and biomes.
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Affiliation(s)
- G D Stentiford
- Pathology and Molecular Systematics Team, Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Barrack Road, Weymouth, Dorset DT4 8UB, UK
| | - -J J Becnel
- United States Department of Agriculture (USDA) Agricultural Research Center (ARS), Center for Medical, Agricultural, and Veterinary Entomology (CMAVE), 1600 South West 23rd Drive, Gainesville, FL, 32608, USA
| | - L M Weiss
- Albert Einstein College of Medicine, 1300 Morris Park Avenue, Forchheimer 504, Bronx, NY 10641, USA
| | - P J Keeling
- Canadian Institute for Advanced Research, Botany Department, University of British Columbia, 3529-6270 University Boulevard, Vancouver, BC, V6T 1Z4 Canada
| | - E S Didier
- Division of Microbiology, Tulane National Primate Research Center and Department of Tropical Medicine, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, New Orleans, LA 70112, USA
| | - B-A P Williams
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope, Stocker Road, Exeter EX4 4QD, UK
| | - S Bjornson
- Department of Biology, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia, Canada
| | - M-L Kent
- Departments of Microbiology and Biomedical Sciences, 220 Nash Hall, Oregon State University, Corvallis, OR 97331, USA
| | - M A Freeman
- Ross University School of Veterinary Medicine, St. Kitts, West Indies
| | - M J F Brown
- School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
| | - E-R Troemel
- University of California, San Diego, 4202 Bonner Hall, 9500 Gilman Drive #0349, La Jolla, CA 92093-0349, USA
| | - K Roesel
- International Livestock Research Institute, c/o Freie Universität Berlin, Institute of Parasitology and Tropical Veterinary Medicine, Robert-von-Ostertag-Strasse 7-13, Berlin, 14163 Germany
| | - Y Sokolova
- Department of Comparative Biomedical Sciences, Louisiana State University, School of Veterinary Medicine, 1909 Skip Bertman Drive, Baton RougeLA 70803, USA
| | - K F Snowden
- Texas A&M University, College of Veterinary Medicine and Biomedical Sciences, Department of Veterinary Pathobiology, Mailstop 4467, College Station, TX 77843-4467, USA
| | - L Solter
- Illinois Natural History Survey, Prairie Research Institute at the University of Illinois at Urbana-Champaign, 1816 South Oak Street, Champaign, IL 61820, USA.
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Paredes-Santos TC, Tomita T, Yan Fen M, de Souza W, Attias M, Vommaro RC, Weiss LM. Development of dual fluorescent stage specific reporter strain of Toxoplasma gondii to follow tachyzoite and bradyzoite development in vitro and in vivo. Microbes Infect 2016; 18:39-47. [PMID: 26432517 PMCID: PMC4715970 DOI: 10.1016/j.micinf.2015.09.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/11/2015] [Accepted: 09/14/2015] [Indexed: 11/23/2022]
Abstract
Toxoplasma gondii is a protozoan that infects 30% of humans as intermediate hosts. T Sexual reproduction can occur only within the intestinal tract of felines, however, infection in other mammals and birds is associated with asexual replication and interconversion between the tachyzoite and bradyzoite stages. Bradyzoites are slow growing forms found in tissue cysts in latent infection. Recently, our group described the biological behavior of the EGS strain that forms thick walled cysts spontaneously in tissue culture, constituting a useful tool for examining the developmental biology of T. gondii. To further improve the usefulness of this model, we constructed genetically modified EGS parasites that express fluorescent tags under the control of stage specific promoters. The promoter regions for SAG-1 (tachyzoite specific), BAG-1 and LDH-2 (bradyzoite specific) were amplified by PCR and plasmids were constructed with mCherry (redT) and sfGFP (greenB) sequences, respectively. Strains of parasites were selected using FACS to arrive at single fluorescent and dual fluorescent strains of EGS expressing tags in a stage specific manner. In cell cultures, vacuoles labeled by immunofluorescence assay using anti-CST-1 a marker for T. gondii cyst wall contained parasites that were positive for BAG1-GFP and negative for SAG1-mCherry. Tachyzoites and bradyzoites harvested from the mice expressed stage specific mCherry and GFP proteins, respectively. These new dual fluorescent transgenic EGS strains are a promising tool to elucidate the mechanisms of T. gondii differentiation both in vitro and in vivo.
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Affiliation(s)
- T C Paredes-Santos
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Rio de Janeiro, Brazil; Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro, Brazil
| | - T Tomita
- Departments of Pathology and Medicine, Albert Einstein College of Medicine - AECOM, USA
| | - M Yan Fen
- Departments of Pathology and Medicine, Albert Einstein College of Medicine - AECOM, USA
| | - W de Souza
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Rio de Janeiro, Brazil; Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro, Brazil
| | - M Attias
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Rio de Janeiro, Brazil; Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro, Brazil
| | - R C Vommaro
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Rio de Janeiro, Brazil; Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens, Rio de Janeiro, Brazil.
| | - L M Weiss
- Departments of Pathology and Medicine, Albert Einstein College of Medicine - AECOM, USA.
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7
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Tanowitz HB, Weiss LM, van Hoeven KH, Kellie S, Winner M. Parasitic diseases of the heart II: Toxoplasmosis and other protozoan and helminthic diseases. Cardiovasc Pathol 2015; 1:97-106. [PMID: 25990121 DOI: 10.1016/1054-8807(92)90013-e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/1991] [Indexed: 11/29/2022] Open
Affiliation(s)
- H B Tanowitz
- Departments of Pathology and Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
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8
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Cozen W, Timofeeva MN, Li D, Diepstra A, Hazelett D, Delahaye-Sourdeix M, Edlund CK, Franke L, Rostgaard K, Van Den Berg DJ, Cortessis VK, Smedby KE, Glaser SL, Westra HJ, Robison LL, Mack TM, Ghesquieres H, Hwang AE, Nieters A, de Sanjose S, Lightfoot T, Becker N, Maynadie M, Foretova L, Roman E, Benavente Y, Rand KA, Nathwani BN, Glimelius B, Staines A, Boffetta P, Link BK, Kiemeney L, Ansell SM, Bhatia S, Strong LC, Galan P, Vatten L, Habermann TM, Duell EJ, Lake A, Veenstra RN, Visser L, Liu Y, Urayama KY, Montgomery D, Gaborieau V, Weiss LM, Byrnes G, Lathrop M, Cocco P, Best T, Skol AD, Adami HO, Melbye M, Cerhan JR, Gallagher A, Taylor GM, Slager SL, Brennan P, Coetzee GA, Conti DV, Onel K, Jarrett RF, Hjalgrim H, van den Berg A, McKay JD. A meta-analysis of Hodgkin lymphoma reveals 19p13.3 TCF3 as a novel susceptibility locus. Nat Commun 2014; 5:3856. [PMID: 24920014 PMCID: PMC4055950 DOI: 10.1038/ncomms4856] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 04/11/2014] [Indexed: 12/20/2022] Open
Abstract
Recent genome-wide association studies (GWAS) of Hodgkin lymphoma (HL) have identified associations with genetic variation at both HLA and non-HLA loci; however, much of heritable HL susceptibility remains unexplained. Here we perform a meta-analysis of three HL GWAS totaling 1,816 cases and 7,877 controls followed by replication in an independent set of 1,281 cases and 3,218 controls to find novel risk loci. We identify a novel variant at 19p13.3 associated with HL (rs1860661; odds ratio (OR)=0.81, 95% confidence interval (95% CI) = 0.76-0.86, P(combined) = 3.5 × 10(-10)), located in intron 2 of TCF3 (also known as E2A), a regulator of B- and T-cell lineage commitment known to be involved in HL pathogenesis. This meta-analysis also notes associations between previously published loci at 2p16, 5q31, 6p31, 8q24 and 10p14 and HL subtypes. We conclude that our data suggest a link between the 19p13.3 locus, including TCF3, and HL risk.
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Affiliation(s)
- W Cozen
- 1] USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA [2]
| | - M N Timofeeva
- 1] International Agency for Research on Cancer (IARC), 69372 Lyon, France [2] Institute of Genetics and Molecular Medicine, University of Edinburgh, EH4 2XU Edinburgh, UK [3]
| | | | - A Diepstra
- 1] University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands [2]
| | - D Hazelett
- 1] USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA [2]
| | - M Delahaye-Sourdeix
- 1] International Agency for Research on Cancer (IARC), 69372 Lyon, France [2]
| | - C K Edlund
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - L Franke
- University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
| | - K Rostgaard
- Statens Serum Institut, DK-2300 Copenhagen, Denmark
| | - D J Van Den Berg
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - V K Cortessis
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - K E Smedby
- Karolinska Institutet and Karolinska University Hospital, S-221 00 Stockholm, Sweden
| | - S L Glaser
- Cancer Prevention Institute of California, Fremont, California 94538, USA
| | - H-J Westra
- University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
| | - L L Robison
- St Jude Children's Hospital, Cordova, Tennessee 38105, USA
| | - T M Mack
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - H Ghesquieres
- Centre Léon Bérard, UMR CNRS 5239-Université Lyon 1, 69008 Lyon, France
| | - A E Hwang
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - A Nieters
- University Medical Centre Freiburg, D-79085 Freiburg, Germany
| | - S de Sanjose
- IDIBELL Institut Català d'Oncologia, 8907 Barcelona, Spain
| | | | - N Becker
- German Cancer Research Centre, D-69120 Heidelberg, Germany
| | - M Maynadie
- CHU de Dijon, EA 4184, University of Burgundy, 21070 Dijon, France
| | - L Foretova
- Masaryk Memorial Cancer Institute, 656 53 Brno, Czech Republic
| | - E Roman
- University of York, YO10 5DD York, UK
| | - Y Benavente
- IDIBELL Institut Català d'Oncologia, 8907 Barcelona, Spain
| | - K A Rand
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - B N Nathwani
- City of Hope National Medical Center, Duarte, California 91010, USA
| | | | - A Staines
- School of Nursing and Human Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - P Boffetta
- Icahn School of Medicine at Mount Sinai, New York City, New York 10029-6574, USA
| | - B K Link
- University of Iowa College of Medicine, Iowa City, Iowa 52242, USA
| | - L Kiemeney
- Radboud University Nijmegen Medical Centre, 6500HB Nijmegen, The Netherlands
| | - S M Ansell
- Mayo Clinic, Rochester, Minnesota 55905, USA
| | - S Bhatia
- City of Hope National Medical Center, Duarte, California 91010, USA
| | - L C Strong
- MD Anderson Cancer Center, University of Texas, Houston, Texas 77030, USA
| | - P Galan
- INSERM U557 (UMR Inserm; INRA; CNAM, Université Paris 13), 93017 Paris, France
| | - L Vatten
- Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | | | - E J Duell
- IDIBELL Institut Català d'Oncologia, 8907 Barcelona, Spain
| | - A Lake
- MRC University of Glasgow Centre for Virus Research, Garscube Estate, University of Glasgow, G12 8QQ Glasgow, Scotland, UK
| | - R N Veenstra
- University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
| | - L Visser
- University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
| | - Y Liu
- University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands
| | - K Y Urayama
- Department of Human Genetics and Disease Diversity, Tokyo Medical and Dental University, Tokyo 104-0044, Japan
| | - D Montgomery
- MRC University of Glasgow Centre for Virus Research, Garscube Estate, University of Glasgow, G12 8QQ Glasgow, Scotland, UK
| | - V Gaborieau
- International Agency for Research on Cancer (IARC), 69372 Lyon, France
| | - L M Weiss
- Clarient Pathology Services, Aliso Viejo, California 92656, USA
| | - G Byrnes
- International Agency for Research on Cancer (IARC), 69372 Lyon, France
| | - M Lathrop
- Genome Quebec, Montreal, Canada H3A 0G1
| | - P Cocco
- Institute of Occupational Health, University of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - T Best
- The University of Chicago, Chicago, Illinois 60637-5415, USA
| | - A D Skol
- The University of Chicago, Chicago, Illinois 60637-5415, USA
| | - H-O Adami
- 1] Karolinska Institutet and Karolinska University Hospital, S-221 00 Stockholm, Sweden [2] Harvard University School of Public Health, Boston, Massachusetts 02115, USA
| | - M Melbye
- Statens Serum Institut, DK-2300 Copenhagen, Denmark
| | - J R Cerhan
- Mayo Clinic, Rochester, Minnesota 55905, USA
| | - A Gallagher
- MRC University of Glasgow Centre for Virus Research, Garscube Estate, University of Glasgow, G12 8QQ Glasgow, Scotland, UK
| | - G M Taylor
- School of Cancer Sciences, University of Manchester, St Mary's Hospital, M13 0JH Manchester, UK
| | - S L Slager
- Mayo Clinic, Rochester, Minnesota 55905, USA
| | - P Brennan
- International Agency for Research on Cancer (IARC), 69372 Lyon, France
| | - G A Coetzee
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - D V Conti
- USC Keck School of Medicine, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California 90089-9175, USA
| | - K Onel
- 1] The University of Chicago, Chicago, Illinois 60637-5415, USA [2]
| | - R F Jarrett
- 1] MRC University of Glasgow Centre for Virus Research, Garscube Estate, University of Glasgow, G12 8QQ Glasgow, Scotland, UK [2]
| | - H Hjalgrim
- 1] Statens Serum Institut, DK-2300 Copenhagen, Denmark [2]
| | - A van den Berg
- 1] University of Groningen, University Medical Centre Groningen, 9700 RB Groningen, The Netherlands [2]
| | - J D McKay
- 1] International Agency for Research on Cancer (IARC), 69372 Lyon, France [2]
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9
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Abstract
Toxoplasma gondii is a protozoan parasite that is widely prevalent in humans and typically results in a chronic infection characterized by cysts located predominantly in the central nervous system. In immunosuppressed hosts, such as patients with HIV infection, the infection can be reactivated from the cysts in the brain resulting in a severe and potentially fatal encephalitis. Studies suggest that the chronic infection may also have neuropathological and behavioral effects in immune competent hosts. An improved understanding of tissue cyst behavior is of importance for understanding both the reactivation as well as the neurophysiological consequences of chronic infection. In vivo studies have identified neurons as host cells for cysts but in vitro studies have found that astrocytes can also foster development of the cysts. In this study we have addressed the question of which neural cell tissue cysts of T. gondii reside during chronic infection using a mouse model. Mice were infected with Me49 Strain T. gondii and the intracellular localization of the cysts analyzed during the development and establishment of a chronic infection at 1, 2, and 6 months post infection. Brains were fixed, cryosectioned, and stained with FITC-Dolichos biflorans to identify the Toxoplasma cysts and they were labeled with cell specific antibodies to neurons or astrocytes and then analyzed using confocal fluorescence microscopy. Cysts were found to occur almost exclusively in neurons throughout chronic infection. No cysts were identified in astrocytes, using the astrocyte marker, GFAP. Astrocyte interactions with neuronal-cysts, however, were frequently observed.
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Affiliation(s)
- T C Melzer
- Department of Microbiology, Montana State University, Bozeman, MT 59717, USA
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10
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Samie A, Obi CL, Tzipori S, Weiss LM, Guerrant RL. Microsporidiosis in South Africa: PCR detection in stool samples of HIV-positive and HIV-negative individuals and school children in Vhembe district, Limpopo Province. Trans R Soc Trop Med Hyg 2007; 101:547-54. [PMID: 17412378 PMCID: PMC3109624 DOI: 10.1016/j.trstmh.2007.02.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [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] [Received: 07/20/2006] [Revised: 02/02/2007] [Accepted: 02/05/2007] [Indexed: 12/01/2022] Open
Abstract
Microsporidia were initially recognized as pathogens of insects and fish but have recently emerged as an important group of human pathogens, especially in immune-compromised individuals, such as those with HIV infection. In this study, we used a PCR-RFLP assay confirmed by quantitative real-time PCR and trichrome staining to determine the prevalence of microsporidian infections among hospital patients and school children in Vhembe region. Enterocytozoon bieneusi was the only microsporidian species detected in these stool samples. It was found in 33 (12.9%) of 255 samples from the hospitals and in 3 (4.5%) of 67 samples from primary school children and was significantly associated (P=0.039) with diarrhea in HIV-positive patients (21.6%) compared to HIV-negative individuals (9%). However, microsporidian infections were not associated with intestinal inflammation as indicated by the lactoferrin test. These results suggest that microsporidia might be a cause of secretory diarrhea in HIV-positive patients. To our knowledge, this is the first report of E. bieneusi in the Vhembe region of South Africa. Further investigations are needed in order to clarify the pathogenesis of E. bieneusi in HIV-positive patients.
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Affiliation(s)
- A Samie
- Department of Microbiology, University of Venda, Thohoyandou 0950, South Africa.
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11
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12
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Abstract
Immune compromise can modify the severity and manifestation of some parasitic infections. More widespread use of newer immnosuppressive therapies, the growing population of individuals with immunocompromised states as well as the prolonged survival of these patients have altered the pattern of parasitic infection. This review article discusses the burden and immunology of parasitic infections in patients who are immunocompromised secondary to congenital immunodeficiency, malnutrition, malignancy, and immunosuppressive medications. This review does not address the literature on parasitic infections in the setting of HIV-1 infection.
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Affiliation(s)
- T Evering
- Department of Medicine (Division of Infectious Diseases), Albert Einstein College of Medicine, Bronx, New York 10461, USA
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13
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Wang J, Weiss LM, Hu B, Chu P, Zuppan C, Felix D, Rausei-Mills V, Chase DR. Usefulness of immunohistochemistry in delineating renal spindle cell tumours. A retrospective study of 31 cases. Histopathology 2004; 44:462-71. [PMID: 15139994 DOI: 10.1111/j.1365-2559.2004.01868.x] [Citation(s) in RCA: 13] [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: 11/28/2022]
Abstract
AIMS To assess the usefulness of immunohistochemistry in delineating tumour diagnoses on a series of morphologically diagnosed renal spindle cell tumours (RSCTs). METHODS AND RESULTS Formalin-fixed paraffin-embedded tissues from 31 morphologically diagnosed tumours were reinterpreted in light of newly obtained immunohistochemical information. By morphology, six had originally been classified as sarcomatoid carcinoma, five as spindle cell tumour (NOS), four as sarcoma (NOS), three as leiomyoma, three as leiomyosarcoma, and one each as fibrous polyp, hamartoma, neurilemmoma, mesoblastic nephroma, medullary fibroma, angiomyolipoma, haemangiopericytoma, malignant rhabdoid tumour, malignant Triton tumour, and carcinosarcoma. The application of immunohistochemistry verified the original diagnosis in 18 cases (18/31, 58%), confirming the diagnosis of sarcomatoid renal carcinoma (4/6), leiomyoma (2/3), leiomyosarcoma (3/3), sarcoma (NOS) (2/4), carcinosarcoma (1/1), malignant rhabdoid tumour (1/1), malignant Triton tumour (1/1), fibrous polyp (1/1), mesoblastic nephroma (1/1), hamartoma (1/1), and angiomyolipoma (1/1). Different tumour designations were suggested in 13 cases (13/31, 42%), including carcinosarcoma, sarcoma (NOS), leiomyosarcoma, solitary fibrous tumour, monomorphic/biphasic angiomyolipoma, endometrial stromal tumour, and congenital mesoblastic nephroma. CONCLUSIONS Our data indicate that although morphology is most important in formulating the initial differential diagnosis, the addition of immunohistochemistry is vital in arriving at the correct classification of RSCTs.
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Affiliation(s)
- J Wang
- Division of Pathology and Laboratory Medicine, Loma Linda University Medical Center, Loma Linda, CA 92354, USA.
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14
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Jiang Z, Wu CL, Woda BA, Iczkowski KA, Chu PG, Tretiakova MS, Young RH, Weiss LM, Blute RD, Brendler CB, Krausz T, Xu JC, Rock KL, Amin MB, Yang XJ. Alpha-methylacyl-CoA racemase: a multi-institutional study of a new prostate cancer marker. Histopathology 2004; 45:218-25. [PMID: 15330799 DOI: 10.1111/j.1365-2559.2004.01930.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.5] [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: 11/29/2022]
Abstract
AIM To test whether alpha-methylacyl-CoA racemase (AMACR) is a sensitive and specific marker of prostate cancer. METHODS AND RESULTS The expression levels of AMACR mRNA were measured by real-time polymerase chain reaction. A total of 807 prostatic specimens were further examined by immunohistochemistry specific for AMACR. Quantitative immunostaining analyses were carried out by using the ChromaVision Automated Cellular Imaging System and the Ariol SL-50 Imaging System, respectively. AMACR mRNA levels measured in prostatic adenocarcinoma were 55 times higher than those in benign prostate tissue. Of 454 cases of prostatic adenocarcinoma, 441 were positive for AMACR, while 254 of 277 cases of benign prostate were negative for AMACR. The sensitivity and specificity of AMACR immunodetection of prostatic adenocarcinomas were 97% and 92%, respectively. Both positive and negative predictive values were 95%. By automatic imaging analyses, the AMACR immunostaining intensity and percentage in prostatic adenocarcinomas were also significantly higher than those in benign prostatic tissue (105.9 versus 16.1 for intensity, 45.7% versus 0.02% and 35.03% versus 4.64% for percentage, respectively). CONCLUSIONS We have demonstrated the promising features of AMACR as a biomarker for prostate cancer in this large series and the potential to develop automated quantitative diagnostic tests.
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Affiliation(s)
- Z Jiang
- University of Massachusetts medical School, Worcester, MA, USA
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15
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de Souza AP, Tang B, Tanowitz HB, Factor SM, Shtutin V, Shirani J, Taylor GA, Weiss LM, Jelicks LA. Absence of Interferon-γ–Inducible Gene IGTP Does Not Significantly Alter the Development of Chagasic Cardiomyopathy in Mice Infected with Trypanosoma cruzi (Brazil Strain). J Parasitol 2003; 89:1237-9. [PMID: 14740917 DOI: 10.1645/ge-3185rn] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 01/21/2023] Open
Abstract
Interferon-gamma (IFN-gamma) contributes to host resistance during acute infection with Trypanosoma cruzi, the causative agent of Chagas' disease. Inducibly expressed guanosine triphosphatase (IGTP), a 48-kDa guanosine triphosphatase (GTPase), is a member of a family of GTPase proteins inducibly expressed by IFN-gamma. The expression pattern of IGTP suggests that it may mediate IFN-gamma-induced responses in a variety of cell types. IGTP has been demonstrated to be important for control of Toxoplasma gondii infection but not for resistance against Listeria monocytogenes. We evaluated the role of IGTP in development of chronic chagasic cardiomyopathy in IGTP null mice and C57X129sv (wild type [WT]) mice infected with the Brazil strain for 6 mo. There was no significant difference in parasitemia or cardiac histopathology between null and WT mice. Right ventricular remodeling was observed in infected IGTP null mice, suggesting that IGTP does not significantly alter the course of T. cruzi infection.
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Affiliation(s)
- A P de Souza
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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16
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Abstract
Members of the phylum Microspora are all obligate intracellular parasites. Little is known concerning metabolic pathways in these parasites, some of which pose serious problems in immunocompromised patients. We investigated polyamine metabolism in the systemic pathogen Enterocytozoon cuniculi using intact pre-emergent spores, and cell-free preparations. We found both polyamine synthetic and interconversion pathways to be operative, as evidenced by conversion of ornithine into polyamines, and production of spermidine from spermine by pre-emergent spores. Recent developments in the antitumour field have highlighted the ability of bis-ethylated polyamine analogues to reduce polyamine levels and block growth of tumour cells. In light of enhanced polyamine uptake in Enc. cuniculi, we have begun to study bis-aryl 3-7-3 and bis-ethyl oligoamine analogues as leads for chemotherapy of microsporidia.
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Affiliation(s)
- C J Bacchi
- Department of Biology, Pace University, New York, NY 10038, U.S.A.
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17
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Tunev SS, McAllister MM, Anderson-Sprecher RC, Weiss LM. Neospora caninum in vitro: evidence that the destiny of a parasitophorous vacuole depends on the phenotype of the progenitor zoite. J Parasitol 2002; 88:1095-9. [PMID: 12537100 PMCID: PMC3109616 DOI: 10.1645/0022-3395(2002)088[1095:ncivet]2.0.co;2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We previously reported that Neospora caninum can be induced to express BAGI, a bradyzoite antigen, within 3 days of culture under stress conditions. The main goals of the present experiment were to increase the expression of BAGI in vitro (in part by extending cultures for 9 days), to observe parasitophorous vacuoles at various points of stage differentiation, and to test the ability of organisms produced in vitro to function like mature bradyzoites. Expression of BAG1 and of a tachyzoite antigen (NcSAGI) was monitored using a double-label immunofluorescence assay. For the purpose of this study, organisms expressing NcSAG1 were designated as tachyzoites, those expressing BAG1 were designated as bradyzoites, and those expressing both antigens were designated as intermediate zoites. The greatest percentage of intermediate zoites and bradyzoites (14%) occurred in bovine monocytes maintained for 9 days. These bradyzoites did not appear to be functionally mature; they did not induce patent infections in dogs. in contrast to bradyzoites that were produced in chronically infected mice. In vitro, large parasitophorous vacuoles contained either a pure population of tachyzoites or a mixture of tachyzoites and intermediate zoites, which is indicative of asynchronous stage conversion of organisms within a vacuole. Bradyzoites were first observed within small vacuoles on day 6. and bradyzoites never shared vacuoles with tachyzoites. This finding suggests that vacuoles containing bradyzoites may develop only if the cell is invaded by a zoite that has already begun bradyzoite differentiation. An alternative possibility is that cysts may develop if the establishing tachyzoite undergoes bradyzoite differentiation before multiplying. Cysts do not appear to arise from transformation of tachyzoites within large parasitophorous vacuoles.
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Affiliation(s)
- S S Tunev
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois, 2001 S. Lincoln Avenue, Urbana, Illinois 61802, USA
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18
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Bacchi CJ, Orozco D, Weiss LM, Frydman B, Valasinas A, Yarlett N, Marton LJ, Wittner M. SL-11158, a synthetic oligoamine, inhibits polyamine metabolism of Encephalitozoon cuniculi. J Eukaryot Microbiol 2002; Suppl:92S-94S. [PMID: 11906095 DOI: 10.1111/j.1550-7408.2001.tb00467.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C J Bacchi
- Haskins Laboratories and Department of Biology, Pace University, New York, NY 10038, USA.
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19
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Affiliation(s)
- L M Weiss
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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20
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Affiliation(s)
- L M Weiss
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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21
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Pileri SA, Grogan TM, Harris NL, Banks P, Campo E, Chan JKC, Favera RD, Delsol G, De Wolf-Peeters C, Falini B, Gascoyne RD, Gaulard P, Gatter KC, Isaacson PG, Jaffe ES, Kluin P, Knowles DM, Mason DY, Mori S, Müller-Hermelink HK, Piris MA, Ralfkiaer E, Stein H, Su IJ, Warnke RA, Weiss LM. Tumours of histiocytes and accessory dendritic cells: an immunohistochemical approach to classification from the International Lymphoma Study Group based on 61 cases. Histopathology 2002; 41:1-29. [PMID: 12121233 DOI: 10.1046/j.1365-2559.2002.01418.x] [Citation(s) in RCA: 431] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Neoplasms of histiocytes and dendritic cells are rare, and their phenotypic and biological definition is incomplete. Seeking to identify antigens detectable in paraffin-embedded sections that might allow a more complete, rational immunophenotypic classification of histiocytic/dendritic cell neoplasms, the International Lymphoma Study Group (ILSG) stained 61 tumours of suspected histiocytic/dendritic cell type with a panel of 15 antibodies including those reactive with histiocytes (CD68, lysozyme (LYS)), Langerhans cells (CD1a), follicular dendritic cells (FDC: CD21, CD35) and S100 protein. This analysis revealed that 57 cases (93%) fit into four major immunophenotypic groups (one histiocytic and three dendritic cell types) utilizing six markers: CD68, LYS, CD1a, S100, CD21, and CD35. The four (7%) unclassified cases were further classifiable into the above four groups using additional morphological and ultrastructural features. The four groups then included: (i) histiocytic sarcoma (n=18) with the following phenotype: CD68 (100%), LYS (94%), CD1a (0%), S100 (33%), CD21/35 (0%). The median age was 46 years. Presentation was predominantly extranodal (72%) with high mortality (58% dead of disease (DOD)). Three had systemic involvement consistent with 'malignant histiocytosis'; (ii) Langerhans cell tumour (LCT) (n=26) which expressed: CD68 (96%), LYS (42%), CD1a (100%), S100 (100%), CD21/35 (0%). There were two morphological variants: cytologically typical (n=17) designated LCT; and cytologically malignant (n=9) designated Langerhans cell sarcoma (LCS). The LCS were often not easily recognized morphologically as LC-derived, but were diagnosed based on CD1a staining. LCT and LCS differed in median age (33 versus 41 years), male:female ratio (3.7:1 versus 1:2), and death rate (31% versus 50% DOD). Four LCT patients had systemic involvement typical of Letterer-Siwe disease; (iii) follicular dendritic cell tumour/sarcoma (FDCT) (n=13) which expressed: CD68 (54%), LYS (8%), CD1a (0%), S100 (16%), FDC markers CD21/35 (100%), EMA (40%). These patients were adults (median age 65 years) with predominantly localized nodal disease (75%) and low mortality (9% DOD); (iv) interdigitating dendritic cell tumour/sarcoma (IDCT) (n=4) which expressed: CD68 (50%), LYS (25%), CD1a (0%), S100 (100%), CD21/35 (0%). The patients were adults (median 71 years) with localized nodal disease (75%) without mortality (0% DOD). In conclusion, definitive immunophenotypic classification of histiocytic and accessory cell neoplasms into four categories was possible in 93% of the cases using six antigens detected in paraffin-embedded sections. Exceptional cases (7%) were resolvable when added morphological and ultrastructural features were considered. We propose a classification combining immunophenotype and morphology with five categories, including Langerhans cell sarcoma. This simplified scheme is practical for everyday diagnostic use and should provide a framework for additional investigation of these unusual neoplasms.
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Affiliation(s)
- S A Pileri
- Service of Pathologic Anatomy and Hematopathology, Institute of Haematology and Clinical Oncology L.e A. Seràgnoli, Bologna University, Italy.
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22
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Abstract
Keratin expression in human tissues and neoplasms Keratin filaments constitute type I and type II intermediate filaments (IFs), with at least 20 subtypes named keratin 1-20. Since certain keratin subtypes are only expressed in some normal human tissues but not others, and vice versa, various tissues have been subclassified according to the pattern of keratin staining. Simple epithelia generally express the simple epithelial keratins 7, 18, 19, and 20, while complex epithelia express complex epithelial keratins 5/6, 10, 14, and 15. When an epithelium undergoes malignant transformation, its keratin profile usually remains constant. The constitution and expression patterns of keratin filaments in human epithelial neoplasms are complex and often distinctive. In this article, we first briefly review the molecular and cell biology of keratin filaments. We then focus on the expression patterns of keratin filaments in various human neoplasms.
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Affiliation(s)
- P G Chu
- Department of Pathology, City of Hope National Medical Center, Duarte, CA 91010, USA
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23
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24
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Wang J, Sun NC, Nozawa Y, Arber DA, Chu P, Chang KL, Weiss LM. Histological and immunohistochemical characterization of extranodal diffuse large-cell lymphomas with prominent spindle cell features. Histopathology 2001; 39:476-81. [PMID: 11737305 DOI: 10.1046/j.1365-2559.2001.01271.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [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: 11/20/2022]
Abstract
AIMS To describe five cases of diffuse large-cell lymphoma with prominent spindle cell components involving skin, nasal-ocular mucosa, and soft tissue. Because of the spindle cell morphology, such cases must be differentiated from true sarcomas arising in or metastasizing to soft tissue, skin, bone, lymph node, or other organs and sites. METHODS AND RESULTS Formalin-fixed paraffin-embedded archival tissue from five consultation cases of diffuse large-cell lymphoma with prominent spindle cell features involving the skin, nasal-ocular mucosa, and soft tissue in three male and two female patients was studied by histology and immunohistochemistry. Clinicopathological findings were also reviewed for all the patients. By morphology, initial evaluation of the cases suggested spindle cell sarcoma in two cases, inflammatory pseudotumour in one case, large-cell lymphoma in another case, and one case was considered suspicious for malignant lymphoma. Immunohistochemistry demonstrated a B-cell lineage in four of the spindle cell lesions, with a diagnosis of primary cutaneous CD30+ anaplastic large cell lymphoma made for the fifth case. Four of five cases also showed actin reactivity. CONCLUSIONS Although extremely rare, lymphomas with prominent spindle cell morphology can be encountered in daily surgical pathology practice, and should be included in the differential diagnosis of spindle cell lesions in skin and soft tissue. The observed actin reactivity in four of the five spindle cell lymphomas may lead to a misdiagnosis of leiomyosarcoma if lymphoid markers are not included in the immunohistochemical panel.
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MESH Headings
- Adult
- Aged
- Antigens, CD/analysis
- Antigens, CD20/analysis
- CD79 Antigens
- Diagnosis, Differential
- Female
- Humans
- Immunohistochemistry
- Leukocyte Common Antigens/analysis
- Lymphoma, B-Cell/metabolism
- Lymphoma, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/pathology
- Male
- Middle Aged
- Receptors, Antigen, B-Cell/analysis
- Sarcoma/metabolism
- Sarcoma/pathology
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Affiliation(s)
- J Wang
- City of Hope National Medical Center, Department of Anatomic Pathology, Duarte, CA 91010, USA
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25
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Abstract
AIMS The cytokeratin 14 (CK14) expression in oncocytomas or oncocytic tumours of various tissue origins has not been established. We have studied CK14 expression in 30 cases of oncocytic tumours of various tissue origins and 33 cases of renal cell carcinoma with overlapping features (mimics) by immunohistochemistry. METHODS AND RESULTS Immunohistochemistry (ABC-HRP method) was performed for detection of CK14 in 30 cases of oncocytic tumour and 33 cases of renal mimics. To demonstrate CK14 specificity and sensitivity in oncocytic tumours, mES-13 (an anti-mitochondrial monoclonal antibody) immunohistochemistry was also performed in 20 of 30 cases on oncocytic tumour and all 33 cases of renal mimics. We found that all 30 cases of oncocytic tumour showed cytoplasmic CK14 positivity. All 20 cases of oncocytic tumour studied with mES-13 were positive. CK14 immunoreactivity was identified in only four cases of renal cell carcinoma (one conventional renal cell carcinoma with granular cytoplasm and three chromophobe renal cell carcinomas with eosinophilic cytoplasm). In contrast, all 33 cases of renal cell carcinoma were positive for mES-13 to varying degrees. CONCLUSION The homogeneous, cytoplasmic, and granular CK14 immunoreactivity is sensitive and specific for oncocytic tumours, whereas CK14 immunoreactivity in renal mimics is light and sporadic with peripheral accentuation.
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Affiliation(s)
- P G Chu
- Division of Pathology, City of Hope National Medical Center, Duarte, CA 91010, USA
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26
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Abstract
Epstein-Barr virus (EBV) was recently linked to hepatocellular carcinogenesis in Japanese patients. It is not clear whether EBV infection is also associated with hepatocellular carcinoma (HCC) occurring in American patients. We studied 41 cases of HCC from the Los Angeles area for evidence of EBV infection by in situ hybridization, immunohistochemistry, and polymerase chain reaction methods. Of 41 cases, 16 were seropositive for hepatitis B virus surface antigen (39%), 9 of 29 tested were seropositive for hepatitis C virus antibody (31%); in total, 22 cases were seropositive for hepatitis B virus and/or hepatitis C virus (53%). Of 41 cases, 1 was positive for EBV-encoded small nonpolyadenylated RNA (EBER)-1 (2%) by in situ hybridization. By immunohistochemistry, two cases were positive for EBV nuclear antigen (EBNA)-1 (5%), one was positive for the transactivating immediate early BZLF1 (ZEBRA) (2%), and none was positive for latent membrane protein-1. None of the 41 cases was positive for latent membrane protein-1 and EBV nuclear antigen (EBNA)-4 DNAs by polymerase chain reaction assay. All four positive cases showed rare EBER-1-, ZEBRA-, or EBNA-1- positive cells (<0.1%); in none of these cases was there expression of any other EBV viral genes. In the one case each that was positive for EBER-1 and ZEBRA, both of which occurred in patients of non-Asian ethnicity, the staining was limited to infiltrating small lymphocytes, and tumor cells were negative. In the two cases that were positive for EBNA-1, both of which occurred in patients of Asian ethnicity, the staining was limited to tumor cells, and infiltrating small lymphocytes were negative. Our study indicates that rare cases of American HCC may contain EBV-infected cells, but it is unlikely that EBV plays a major role in the carcinogenesis of HCC.
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Affiliation(s)
- P G Chu
- Department of Pathology, City of Hope National Medical Center, Duarte, California 91010, USA.
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27
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Abstract
Toxoplasma gondii is an important pathogen in the central nervous system, causing a severe and often fatal encephalitis in patients with AIDS. Gamma interferon (IFN-gamma) is the main cytokine preventing reactivation of Toxoplasma encephalitis in the brain. Microglia are important IFN-gamma-activated effector cells controlling the growth of T. gondii in the brain via a nitric oxide (NO)-mediated mechanism. IFN-gamma can also activate astrocytes to inhibit the growth of T. gondii. Previous studies found that the mechanism in murine astrocytes is independent of NO and all other known anti-Toxoplasma mechanisms. In this study we investigated the role of IGTP, a recently identified IFN-gamma-regulated gene, in IFN-gamma inhibition of T. gondii in murine astrocytes. Primary astrocytes were cultivated from IGTP-deficient mice, treated with IFN-gamma, and then tested for anti-Toxoplasma activity. In wild-type astrocytes T. gondii growth was significantly inhibited by IFN-gamma, whereas in astrocytes from IGTP-deficient mice IFN-gamma did not cause a significant inhibition of growth. Immunoblot analysis confirmed that IFN-gamma induced significant levels of IGTP in wild-type murine astrocytes within 24 h. These results indicate that IGTP plays a central role in the IFN-gamma-induced inhibition of T. gondii in murine astrocytes.
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Affiliation(s)
- S K Halonen
- Department of Natural Sciences, Mercy College, Dobbs Ferry, New York 10522, USA
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28
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Abstract
Solitary fibrous tumors are spindle cell neoplasms frequently arising in the serosal surface as well as a variety of other sites. We report two cases of large solitary fibrous tumor arising in the kidney, clinically thought to be renal cell carcinoma, in 41- and 72-year-old men. Although large in size (13.0 and 14.0 cm in greatest dimension, respectively), both lesions were well circumscribed and composed of a mixture of spindle cells and dense collagenous bands with no areas of necrosis or cystic changes noted macroscopically or microscopically. Immunohistochemical studies revealed reactivity for vimentin, CD34, collagen IV, and bcl-2 protein in both cases, with no staining for keratin, S-100 protein, or muscle markers, confirming the diagnosis of solitary fibrous tumor of the kidney. Solitary fibrous tumor of the kidney is rare but may present as a large mass that may be clinically confused with carcinoma or sarcoma.
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Affiliation(s)
- J Wang
- Department of Pathology and Laboratory Medicine, Loma Linda University Medical Center, California 92354, USA
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29
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Abstract
We studied 48 cases of invasive breast carcinoma for evidence of Epstein-Barr virus (EBV), which is associated with many human malignancies. In situ hybridization studies to detect the presence of EBV-encoded small nonpolyadenylated RNA (EBER)-1 were performed in paraffin sections. Immunohistochemical studies to detect EBV nuclear antigen (EBNA)-1, latent membrane protein (LMP)-1, and the transactivating immediate-early BZLF1 (ZEBRA) protein were also performed in paraffin sections. The presence of EBV genomic DNA was studied by polymerase chain reaction (PCR) amplification using sets of primers flanking the EBNA-4 and the EBV-LMP-1 genes in frozen tissues. Southern blot analysis using a probe flanking the EBV terminal repeat region was then attempted in cases that were PCR-positive. Five of 48 cases (10%) of breast carcinoma showed focal EBER-positive tumor cells. Twelve cases (25%) were positive for EBNA-1 by immunohistochemistry, all but one different from the EBER-positive cases. None of the cases were positive for LMP-1 or ZEBRA protein by immunohistochemistry. PCR studies for EBNA-4 and LMP-1 were each positive in five cases (including three cases in common). However, Southern blot studies successfully performed in all but one of the PCR-positive cases were completely negative. The identification of EBV by any methodology was not correlated with tumor size, grade, or lymph node status. This study demonstrated evidence of EBV infection in tissues involved by invasive breast carcinomas in a significant subset of cases. However, the lack of localization of EBV infection to a significant population of the tumor cells in any case, the negativity by Southern blot hybridization, and the lack of expression of multiple antigens in any case strongly argue against a significant role for EBV in the pathogenesis of breast carcinoma.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adult
- Aged
- Aged, 80 and over
- Breast Neoplasms/pathology
- Breast Neoplasms/virology
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/virology
- Carcinoma, Lobular/pathology
- Carcinoma, Lobular/virology
- Carrier Proteins/analysis
- Cytoskeletal Proteins
- DNA, Viral/analysis
- DNA-Binding Proteins/analysis
- Epstein-Barr Virus Nuclear Antigens/analysis
- Female
- Herpesvirus 4, Human/genetics
- Herpesvirus 4, Human/isolation & purification
- Humans
- Immunohistochemistry
- In Situ Hybridization
- Intracellular Signaling Peptides and Proteins
- LIM Domain Proteins
- Lymph Node Excision
- Lymph Nodes/pathology
- Lymph Nodes/virology
- Lymphatic Metastasis
- Middle Aged
- Neoplasm Invasiveness
- Polymerase Chain Reaction
- RNA, Viral/analysis
- Retrospective Studies
- Trans-Activators/analysis
- Viral Proteins/analysis
- Zinc Fingers
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Affiliation(s)
- P G Chu
- Division of Pathology, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA.
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30
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Herbst LH, Costa SF, Weiss LM, Johnson LK, Bartell J, Davis R, Walsh M, Levi M. Granulomatous skin lesions in moray eels caused by a novel Mycobacterium species related to Mycobacterium triplex. Infect Immun 2001; 69:4639-46. [PMID: 11402008 PMCID: PMC98541 DOI: 10.1128/iai.69.7.4639-4646.2001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [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: 11/20/2022] Open
Abstract
An outbreak of granulomatous dermatitis was investigated in a captive population of moray eels. The affected eels had florid skin nodules concentrated around the head and trunk. Histopathological examination revealed extensive granulomatous inflammation within the dermis and subcutaneous fascial plane between the fat and axial musculature. Acid-fast rods were detected within the smallest lesions, which were presumably the ones that had developed earliest. Eventually, after several months of incubation at room temperature, a very slowly growing acid-fast organism was isolated. Sequencing of the 16S rRNA gene identified it as a Mycobacterium species closely related (0.59% divergence) to M. triplex, an SAV mycobacterium. Intradermal inoculation of healthy green moray eels with this organism reliably reproduced the lesion. Experimentally induced granulomatous dermatitis appeared within 2 weeks of inoculation and slowly but progressively expanded during the 2 months of the experiment. Live organisms were recovered from these lesions at all time points, fulfilling Koch's postulates for this bacterium. In a retrospective study of tissues collected between 1993 and 1999 from five spontaneous disease cases, acid-fast rods were consistently found within lesions, and a nested PCR for the rRNA gene also demonstrated the presence of mycobacteria within affected tissues.
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Affiliation(s)
- L H Herbst
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
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31
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Chu PG, Lyda MH, Weiss LM. Cytokeratin 14 expression in epithelial neoplasms: a survey of 435 cases with emphasis on its value in differentiating squamous cell carcinomas from other epithelial tumours. Histopathology 2001; 39:9-16. [PMID: 11454039 DOI: 10.1046/j.1365-2559.2001.01105.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [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: 11/20/2022]
Abstract
AIMS The tissue distribution of cytokeratin 14 (CK14) in epithelial neoplasms is not well defined. We have evaluated 435 cases of epithelial neoplasm of various origins with cytokeratin 14 monoclonal antibody with special attention to possible use in differential diagnosis. METHODS AND RESULTS Immunohistochemistry (ABC-HRP method) was performed for detection of CK14. We found that the expression of cytokeratin 14 was generally restricted to: (i) the majority of cases of squamous cell carcinoma regardless of origin (67/74) and degree of differentiation; (ii) neoplasms with focal squamous differentiation, including endometrial, and ovarian adenocarcinoma, malignant mesothelioma and transitional cell carcinoma; (iii) thymoma (8/8); (iv) myoepithelial components of salivary gland pleomorphic adenoma (3/4); and (v) oncocytic neoplasms, including thyroid Hurthle cell adenoma (1/1) and salivary gland Warthin's tumour (2/2). CONCLUSION CK14 protein is a useful marker in differential diagnosis of squamous cell carcinomas.
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Affiliation(s)
- P G Chu
- Division of Pathology, City of Hope National Medical Center, Duarte, CA, USA
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32
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Abstract
Microsporidia are obligate intracellular parasites, which can cause complications in immunocompromised individuals. Very little is known about the host immune response generated against these infectious agents. Encephalitozoon cuniculi is the best studied microsporidian and the protective immune response against this parasite is mediated by cytotoxic CD8(+) T cells.
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Affiliation(s)
- I A Khan
- Department of Medicine and Microbiology, Dartmouth Medical School, HB 7506, One Medical Center Drive, Lebanon, NH 03756, USA.
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33
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34
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Bacchi CJ, Lane S, Weiss LM, Yarlett N, Takvorian P, Cali A, Wittner M. Polyamine synthesis and interconversion by the Microsporidian Encephalitozoon cuniculi. J Eukaryot Microbiol 2001; 48:374-81. [PMID: 11411847 DOI: 10.1111/j.1550-7408.2001.tb00327.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 11/29/2022]
Abstract
Polyamines are small cationic molecules necessary for growth and differentiation in all cells. Although mammalian cells have been studied extensively, particularly as targets of polyamine antagonists, i.e. antitumor agents, polyamine metabolism has also been studied as a potential drug target in microorganisms. Since little is known concerning polyamine metabolism in the microsporidia, we investigated it in Encephalitozoon cuniculi, a microspordian associated with disseminated infections in humans. Organisms were grown in RK-13 cells and harvested using Percoll gradients. Electron microscopy indicated that the fractions banding at 1.051-1.059/g/ml in a microgradient procedure, and 1.102-1.119/g/ml in a scaled-up procedure were nearly homogenous, consisting of pre-emergent (immature) spores which showed large arrays of ribosomes near polar filament coils. Intact purified pre-emergent spores incubated with [1H] ornithine and methionine synthesized putrescine, spermidine, and spermine, while [14C]spermine was converted to spermidine and putrescine. Polyamine production from ornithine was inhibitable by DL-alpha-difluoromethylornithine (DFMO) but not by DL-alpha-difluoromethylarginine (DFMA). Cell-free extracts from mature spores released into the growth media had ornithine decarboxylase (ODC), S-adenosylmethionine decarboxylase (AdoMetdc), and spermidine/spermine N1-acetyltransferase (SSAT) activities. ODC activity was inhibited by DFMO, but not by DFMA. AdoMetdc was putrescine-stimulated and inhibited by methylglyoxal-bis(guanylhydrazone); arginine decarboxylase activity could not be detected. It is apparent from these studies that Encephalitozoon cuniculi pre-emergent spores have a eukaryotic-type polyamine biosynthetic pathway and can interconvert exogenous polyamines. Pre-emergent spores were metabolically active with respect to polyamine synthesis and interconversion, while intact mature spores harvested from culture supernatants had little metabolic activity.
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Affiliation(s)
- C J Bacchi
- Haskins Laboratory, Pace University, New York, New York 10038, USA.
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35
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Petkova SB, Huang H, Factor SM, Pestell RG, Bouzahzah B, Jelicks LA, Weiss LM, Douglas SA, Wittner M, Tanowitz HB. The role of endothelin in the pathogenesis of Chagas' disease. Int J Parasitol 2001; 31:499-511. [PMID: 11334935 DOI: 10.1016/s0020-7519(01)00168-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [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: 12/21/2022]
Abstract
Infection with Trypanosoma cruzi causes a generalised vasculitis of several vascular beds. This vasculopathy is manifested by vasospasm, reduced blood flow, focal ischaemia, platelet thrombi, increased platelet aggregation and elevated plasma levels of thromboxane A(2) and endothelin-1. In the myocardium of infected mice, myonecrosis and a vasculitis of the aorta, coronary artery, smaller myocardial vessels and the endocardial endothelium are observed. Immunohistochemistry studies employing anti-endothelin-1 antibody revealed increased expression of endothelin-1, most intense in the endocardial and vascular endothelium. Elevated levels of mRNA for prepro endothelin-1, endothelin converting enzyme and endothelin-1 were observed in the infected myocardium. When T. cruzi-infected mice were treated with phosphoramidon, an inhibitor of endothelin converting enzyme, there was a decrease in heart size and severity of pathology. Mitogen-activated protein kinases and the transcription factor activator-protein-1 regulate the expression of endothelin-1. Therefore, we examined the activation of mitogen-activated protein kinases in the myocardium by T. cruzi. Western blot demonstrated an extracellular signal regulated kinase. In addition, the activator-protein-1 DNA binding activity, as determined by electrophoretic mobility shift assay, was increased. Increased expression of cyclins A and cyclin D1 was observed in the myocardium, and immunohistochemistry studies revealed that interstitial cells and vascular and endocardial endothelial cells stained intensely with antibodies to these cyclins. These data demonstrate that T. cruzi infection of the myocardium activates extracellular signal regulated kinase, activator-protein-1, endothelin-1, and cyclins. The activation of these pathways is likely to contribute to the pathogenesis of chagasic heart disease. These experimental observations suggest that the vasculature plays a role in the pathogenesis of chagasic cardiomyopathy. Additionally, the identification of these pathways provides possible targets for therapeutic interventions to ameliorate or prevent the development of cardiomyopathy during T. cruzi infection.
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Affiliation(s)
- S B Petkova
- Department of Pathology, Albert Einstein College of Medicine, Jacobi Medical Center, 1300 Morris Park Avenue, 10461, Bronx, NY, USA
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36
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Abstract
Pulmonary Langerhans' cell histiocytosis (LCH) is a form of Langerhans' cell disease that primarily affects smokers in the third to fifth decade. Extrapulmonary manifestations are rare. Its clinical course is typically characterized by stabilization or regression of bilateral micronodular infiltrates seen on chest radiographs; progression to honeycomb fibrosis is rare. Because the clinical course of pulmonary LCH is distinct from systemic multiorgan LCH, currently thought to be a clonal proliferative disorder, we examined the X-linked polymorphic human androgen receptor assay (HUMARA) locus to assess clonality in female patients with one or more discrete LCH cell nodules in open lung biopsies. Langerhans' cells (LCH cells) were excised from formalin-fixed, paraffin-embedded tissue by microdissection to assure a relatively pure cellular population, and studies for differential methylation patterns at the HUMARA locus were performed. Twenty-four nodules in 13 patients were evaluated. Seven (29%) were clonal and 17 (71%) were nonclonal. Of six cases with multiple discrete nodules, three (50%) showed a nonclonal LCH cell population. In one biopsy with five nodules, two nodules were clonal with one allele inactivated, one nodule was clonal with the other allele inactivated, and two nodules were nonclonal. In contrast to systemic LCH, pulmonary LCH appears to be primarily a reactive process in which nonlethal, nonmalignant clonal evolution of LCH cells may arise in the setting of nonclonal LCH cell hyperplasia. Cigarette smoking may be the stimulus for pulmonary LCH in contrast to other forms of LCH.
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Affiliation(s)
- S A Yousem
- Departments of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213, USA
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37
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Chu PG, Arber DA, Weiss LM, Chang KL. Utility of CD10 in Distinguishing between Endometrial Stromal Sarcoma and Uterine Smooth Muscle Tumors: An Immunohistochemical Comparison of 34 Cases. Mod Pathol 2001; 14:465-71. [PMID: 11353058 DOI: 10.1038/modpathol.3880335] [Citation(s) in RCA: 208] [Impact Index Per Article: 9.0] [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: 11/09/2022]
Abstract
Endometrial stromal sarcoma (ESS), uterine cellular leiomyoma (UCL), and uterine leiomyosarcoma (ULS) are composed mainly of spindle cells that express similar antigens such as desmin, smooth muscle actin (SMA), and muscle-specific actin (MSA). The differential diagnosis of an ESS versus a uterine smooth muscle tumor or an extrauterine spindle cell sarcoma can be problematic based solely on clinical presentation, histologic assessment, or routine immunohistochemistry. Recently, we reported that normal endometrium, but not myometrium, as well as five cases of ESS, were positive for CD10. We now report the results of CD10 immunohistochemistry in an additional 11 cases of ESS (total 16 cases), 10 cases of UCL, and nine cases of ULS. CD10 immunoreactivity was detected in 16 of 16 cases of ESS (100%) as compared to only 2 of 10 cases of UCL (20%) and none of nine cases of ULS (0%). We compared the utility of CD10 immunoreactivity with that of desmin, SMA, MSA, estrogen receptor (ER), and inhibin in these tumors. Although the majority of cases of UCL and ULS were positive for SMA, MSA, and desmin, a substantial portion of cases of ESS were also positive for SMA, MSA, and desmin. We conclude that in combination with SMA, MSA, and desmin, CD10 is a useful immunohistochemical marker in the differential diagnosis of ESS versus UCL or ULS.
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Affiliation(s)
- P G Chu
- Division of Pathology, City of Hope National Medical Center, Duarte, California 91010, USA.
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38
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Martins GA, Petkova SB, MacHado FS, Kitsis RN, Weiss LM, Wittner M, Tanowitz HB, Silva JS. Fas-FasL interaction modulates nitric oxide production in Trypanosoma cruzi-infected mice. Immunology 2001; 103:122-9. [PMID: 11380700 PMCID: PMC1783222 DOI: 10.1046/j.1365-2567.2001.01216.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [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] [Received: 08/31/2000] [Revised: 11/20/2000] [Accepted: 01/17/2001] [Indexed: 12/15/2022] Open
Abstract
During acute Trypanosoma cruzi infection in mice, many leucocytes undergo apoptosis. Although apoptosis has been ascribed to increased levels of nitric oxide (NO) and Fas-FasL interaction, the importance of this phenomenon in modulating the host response against T. cruzi is unknown. Herein, the role of NO- and Fas-FasL-induced apoptosis in modulating the immune response to T. cruzi was evaluated using mice deficient in Fas expression (MRL/MpJ-Fas lpr) and inducible nitric oxide synthase (iNOS) knockout mice (iNOS-/-). The results showed that besides decreasing apoptosis induction after infection, impairment of the Fas-FasL interaction resulted in decreased NO production, as a consequence of enhanced T helper 2 (Th2) cytokine production. Differently, blockage of NO-induced apoptosis resulted in uncontrolled cytokine production, rather than a biased Th2 cytokine pattern. Together, these results suggested that Fas and FasL-induced apoptosis could be implied in modulation of the immune response against T. cruzi by interfering with cytokine and NO production during the acute phase of the infection.
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Affiliation(s)
- G A Martins
- Department of Immunology, School of Medicine of Ribeirão Preto-USP, Ribeirão Preto, São Paulo, Brazil
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39
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40
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Abstract
Knowledge about the phylum Microspora and its relationship to humans is in a period of rapid growth as noninvasive diagnostic techniques for microsporidia have been developed and are being applied to both clinical and epidemiologic studies. As these techniques have improved, new microsporidian pathogens and reservoir hosts of the microsporidia infecting humans are being identified. Recent phylogenetic data suggest that microsporidia are related to the fungi. This information may prove useful in investigations into new therapeutic strategies for these emerging human pathogens.
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Affiliation(s)
- L M Weiss
- Albert Einstein College of Medicine, Bronx, N.Y., USA.
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41
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Abstract
Microsporidia are eukaryotic spore forming obligate intracellular protozoan parasites first recognized over 100 years ago. These organisms infect all of the major animal groups and are now recognized as opportunistic pathogens of humans. Microsporidian spores are common in the environment and microsporidia pathogenic to humans have been found in water supplies. The genera Nosema, Vittaforma, Brachiola, Pleistophora, Encephalitozoon, Enterocytozoon, Septata (reclassified to Encephalitozoon) and Trachipleistophora have been found in human infections. These organisms have the smallest known eukaryotic genomes. Microsporidian ribosomal RNA sequences have proven useful as diagnostic tools as well as for phylogenetic analysis. Recent phylogenetic analysis suggests that Microsporidia are related to the fungi. These organisms are defined by the presence of a unique invasion organelle consisting of a single polar tube that coils around the interior of the spore. All microsporidia exhibit the same response to stimuli, that is, the polar tube discharges from the anterior pole of the spore in an explosive reaction. If the polar tube is discharged next to a cell, it can pierce the cell and transfer its sporoplasm into the cell. A technique was developed for the purification of polar tube proteins (PTPs) using differential extraction followed by reverse phase HPLC. This method was used to purify the PTPs from Glugea americanus, Encephalitozoon cuniculi, Enc. hellem and Enc. intestinalis. These PTPs demonstrate conserved characteristics such as solubility, hydrophobicity, mass, proline content and immunologic epitopes. The major PTP gene from Enc. cuniculi and Enc. hellem has been cloned and expressed in vitro. The gene sequences support the importance of ER and in the formation of the polar tube as suggested by morphologic studies. Analysis of the cloned proteins also indicates that secondary structural characteristics are conserved. These characteristics are probably important in the function of this protein during the eversion/assembly of the polar tube and in providing elasticity and resiliency for sporoplasm passage.
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Affiliation(s)
- L M Weiss
- Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue Room 504 Forchheimer Building, Bronx, New York, NY 10461, USA.
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42
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43
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Abstract
The ability of Toxoplasma gondii tachyzoites to differentiate into latent bradyzoite forms is essential for pathogenesis of clinical disease. We examined the effects of cyclic nucleotides on T. gondii bradyzoite differentiation in vitro. Differentiation of tachyzoites to bradyzoites was measured in an immunofluorescence assay using ME49 or its clonal derivative PLK, two well-characterized T. gondii strains. Treatment of human fibroblast cultures infected with T. gondii with 8-(4-chlorophenylthio)-cyclic GMP (CPT-cGMP), a membrane-permeable, nonhydrolyzable analogue of cGMP, resulted in an increased percentage of bradyzoite-positive vacuoles. Cyclic AMP (cAMP) also induced in vitro conversion of PLK, but the method of cAMP elevation was critical. Forskolin raises cAMP levels transiently and induced bradyzoites, whereas agents predicted to cause sustained elevation of cAMP were inhibitory to parasite conversion. Levels of cAMP were measured in host cells and extracellular tachyzoites. Forskolin, CPT-cGMP, and agents known to induce bradyzoite formation elevated cAMP in host cells and PLK parasites. These data suggest cyclic nucleotide signaling pathways are important in the stress-induced conversion of T. gondii tachyzoites to bradyzoites. Furthermore, because cAMP elevation was seen in PLK but not RH, a T. gondii strain that did not differentiate well in our assay, cAMP signaling within the parasite is likely to be critical.
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Affiliation(s)
- L A Kirkman
- Division of Infectious Diseases, Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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44
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Abstract
Toxoplasma gondii is an important protozoan pathogen of humans that can cause encephalitis in immunocompromised individuals such as those with AIDS. This encephalitis is due to reactivation of latent infection in T. gondii-seropositive patients. Latent organisms survive within tissue cysts, which are specialized parasitophorous vacuoles containing bradyzoites. The cyst wall of this structure is produced by modification of the parasitophorous vacuole by the parasite and is important in cyst survival. The components of the cyst wall have been poorly characterized. By using immunofluorescence and immunoelectron microscopy, we have identified a monoclonal antibody (MAb 93.18) that reacts with the cyst wall. This antibody recognizes a 116-kDa glycoprotein, which we have termed CST1, containing sugar residues that bind Dolichos biflorans lectin (DBA). CST1 is distinct from T. gondii antigen labeled with succinyl Triticum vulgare lectin (S-WGA) and represents the major DBA-binding component in T. gondii. The carbohydrate components of the tissue cyst, such as CST1, are probably important in both providing stability and facilitating persistence in its host. As is seen in the carbohydrate capsules of fungi, glycoproteins in the T. gondii cyst wall may protect cysts from the immune response of the host. Further characterization of the formation of the cyst wall and its components should lead to insights into the mechanism of tissue cyst persistence and may suggest novel therapeutic approaches to eliminate tissue cysts of this organism.
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Affiliation(s)
- Y W Zhang
- Department of Pathology, Division of Parasitology, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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45
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Lyda MH, Tetef M, Carter NH, Ikle D, Weiss LM, Arber DA. Keratin immunohistochemistry detects clinically significant metastases in bone marrow biopsy specimens in women with lobular breast carcinoma. Am J Surg Pathol 2000; 24:1593-9. [PMID: 11117779 DOI: 10.1097/00000478-200012000-00002] [Citation(s) in RCA: 15] [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: 11/26/2022]
Abstract
Some patients with breast cancer currently undergo bone marrow biopsy to make clinical decisions regarding therapy; however, lobular carcinoma can be difficult to detect in routine histologic sections. The authors reviewed retrospectively all available bone marrow biopsies from patients with lobular carcinoma diagnosed between January, 1, 1989, and September, 25, 1997, at the City of Hope National Medical Center to identify useful morphologic features and to determine the utility of pan-keratin immunohistochemical (IHC) staining. A total of 65 biopsies from 54 patients were reviewed. Thirteen of the 65 biopsies were classified initially as containing metastatic tumor based on histologic features alone. With the addition of keratin IHC, seven additional cases of metastatic disease were detected. Forty of the 54 patients received stem cell replacement or autologous bone marrow transplantation. Disease-free survival after high-dose chemotherapy with stem cell replacement or autologous bone marrow transplantation was stratified into three groups based on hematoxylin and eosin (H&E) staining and IHC results. Two-year disease-free survival was 33% for the H&E-/IHC+ group versus 90% for the H&E-/IHC- group (p = 0.005) among patients clinically free of disease at the time of stem cell replacement or autologous bone marrow transplantation. Two-year disease-free survival was 0% in the H&E+/IHC+ group (p = 0.04, compared with the H&E-/ IHC+ group). The authors conclude that routine morphologic examination without the aid of keratin IHC is unreliable in detecting clinically relevant metastatic lobular carcinoma in bone marrow biopsies. These findings suggest that pan-keratin immunostaining may be indicated on bone marrow biopsy specimens from lobular carcinoma patients if the biopsy appears histologically negative for metastatic tumor on H&E sections.
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Affiliation(s)
- M H Lyda
- Division of Pathology, City of Hope National Medical Center, Duarte, California 91010, USA
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46
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Chu PG, Chang KL, Weiss LM, Arber DA. Immunohistochemical detection of CD10 in paraffin sections of hematopoietic neoplasms: a comparison with flow cytometry detection in 56 cases. Appl Immunohistochem Mol Morphol 2000; 8:257-62. [PMID: 11127916] [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: 02/18/2023]
Abstract
Paraffin-section immunohistochemistry with heat-induced epitope retrieval using a newly characterized monoclonal antibody (clone 56C6) against the CD10 antigen was performed on 56 hematopoietic tumors previously studied for CD10 expression by flow cytometry. The cases included 33 precursor B-lymphoblastic leukemias, 10 acute myeloid leukemias, five precursor T-lymphoblastic leukemias, five follicular lymphomas, and three Burkitt cell leukemias. Forty of the 56 cases were CD10 positive by flow cytometry studies, including all five follicular lymphomas (100%); 30 of 33 (91%) cases of precursor B-lymphoblastic leukemias, two of three (66%) cases of Burkitt cell leukemias, two of five (40%) cases of precursor T-lymphoblastic leukemias, and none of the 10 cases of acute myeloid leukemia. Thirty-nine of the 40 (97%) flow cytometric CD10-positive cases also expressed CD10 by immunohistochemistry in formalin- or B5-fixed, paraffin-embedded tissue, with only one case of precursor B-lymphoblastic leukemia being positive by flow cytometry and negative by immunohistochemistry. The 16 CD10-negative flow cytometry specimens were all also negative by immunohistochemistry. Thirty-seven CD10 immunohistochemistry positive cases showed a diffuse membranous staining pattern and two cases demonstrated a Golgi staining pattern. The fixation methods (10% neutral buffered formalin versus B5) and decalcification did not affect the CD10 immunostaining results. This study demonstrates that the new CD10 monoclonal antibody clone 56C6 is a reliable marker for detection of CD10 antigen expression in formalin-and B5-fixed paraffin-embedded tissue after heat-induced epitope retrieval when compared with flow cytometry detection of fresh tissue samples.
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Affiliation(s)
- P G Chu
- Division of Pathology, City of Hope National Medical Center, Duarte, California 91010, USA
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47
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Bunjun S, Stathopoulos C, Graham D, Min B, Kitabatake M, Wang AL, Wang CC, Vivarès CP, Weiss LM, Söll D. A dual-specificity aminoacyl-tRNA synthetase in the deep-rooted eukaryote Giardia lamblia. Proc Natl Acad Sci U S A 2000; 97:12997-3002. [PMID: 11078517 PMCID: PMC27167 DOI: 10.1073/pnas.230444397] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [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: 11/18/2022] Open
Abstract
Cysteinyl-tRNA (Cys-tRNA) is essential for protein synthesis. In most organisms the enzyme responsible for the formation of Cys-tRNA is cysteinyl-tRNA synthetase (CysRS). The only known exceptions are the euryarchaea Methanococcus jannaschii and Methanobacterium thermoautotrophicum, which do not encode a CysRS. Deviating from the accepted concept of one aminoacyl-tRNA synthetase per amino acid, these organisms employ prolyl-tRNA synthetase as the enzyme that carries out Cys-tRNA formation. To date this dual-specificity prolyl-cysteinyl-tRNA synthetase (ProCysRS) is only known to exist in archaea. Analysis of the preliminary genomic sequence of the primitive eukaryote Giardia lamblia indicated the presence of an archaeal prolyl-tRNA synthetase (ProRS). Its proS gene was cloned and the gene product overexpressed in Escherichia coli. By using G. lamblia, M. jannaschii, or E. coli tRNA as substrate, this ProRS was able to form Cys-tRNA and Pro-tRNA in vitro. Cys-AMP formation, but not Pro-AMP synthesis, was tRNA-dependent. The in vitro data were confirmed in vivo, as the cloned G. lamblia proS gene was able to complement a temperature-sensitive E. coli cysS strain. Inhibition studies of CysRS activity with proline analogs (thiaproline and 5'-O-[N-(l-prolyl)-sulfamoyl]adenosine) in a Giardia S-100 extract predicted that the organism also contains a canonical CysRS. This prediction was confirmed by cloning and analysis of the corresponding cysS gene. Like a number of archaea, Giardia contains two enzymes, ProCysRS and CysRS, for Cys-tRNA formation. In contrast, the purified Saccharomyces cerevisiae and E. coli ProRS enzymes were unable to form Cys-tRNA under these conditions. Thus, the dual specificity is restricted to the archaeal genre of ProRS. G. lamblia's archaeal-type prolyl- and alanyl-tRNA synthetases refine our understanding of the evolution and interaction of archaeal and eukaryal translation systems.
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Affiliation(s)
- S Bunjun
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114, USA
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48
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Abstract
Toxoplasmosis is one of the more common parasitic zoonoses world-wide. Its causative agent, Toxoplasma gondii, is a facultatively heteroxenous, polyxenous protozoon that has developed several potential routes of transmission within and between different host species. If first contracted during pregnancy, T. gondii may be transmitted vertically by tachyzoites that are passed to the foetus via the placenta. Horizontal transmission of T. gondii may involve three life-cycle stages, i.e. ingesting infectious oocysts from the environment or ingesting tissue cysts or tachyzoites which are contained in meat or primary offal (viscera) of many different animals. Transmission may also occur via tachyzoites contained in blood products, tissue transplants, or unpasteurised milk. However, it is not known which of these routes is more important epidemiologically. In the past, the consumption of raw or undercooked meat, in particular of pigs and sheep, has been regarded as a major route of transmission to humans. However, recent studies showed that the prevalence of T. gondii in meat-producing animals decreased considerably over the past 20 years in areas with intensive farm management. For example, in several countries of the European Union prevalences of T. gondii in fattening pigs are now <1%. Considering these data it is unlikely that pork is still a major source of infection for humans in these countries. However, it is likely that the major routes of transmission are different in human populations with differences in culture and eating habits. In the Americas, recent outbreaks of acute toxoplasmosis in humans have been associated with oocyst contamination of the environment. Therefore, future epidemiological studies on T. gondii infections should consider the role of oocysts as potential sources of infection for humans, and methods to monitor these are currently being developed. This review presents recent epidemiological data on T. gondii, hypotheses on the major routes of transmission to humans in different populations, and preventive measures that may reduce the risk of contracting a primary infection during pregnancy.
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Affiliation(s)
- A M Tenter
- Institut für Parasitologie, Tierärztliche Hochschule Hannover, Bünteweg 17, D-30559, Hannover, Germany.
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Huang H, Petkova SB, Pestell RG, Bouzahzah B, Chan J, Magazine H, Weiss LM, Christ GJ, Lisanti MP, Douglas SA, Shtutin V, Halonen SK, Wittner M, Tanowitz HB. Trypanosoma cruzi infection (Chagas' disease) of mice causes activation of the mitogen-activated protein kinase cascade and expression of endothelin-1 in the myocardium. J Cardiovasc Pharmacol 2000; 36:S148-50. [PMID: 11078362 DOI: 10.1097/00005344-200036051-00046] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Chagas' disease, caused by the parasite Trypanosoma cruzi, is an important cause of heart disease. Previous studies from this laboratory revealed that microvascular spasm and myocardial ischemia were observed in infected mice. Infection of endothelial cells with this parasite increased the synthesis of biologically active endothelin-1 (ET-1). Therefore. in the myocardium of T. cruzi-infected mice, we examined ET-1 expression and the p42/44-mitogen activated protein kinase (MAPK)-AP-1 pathway that regulates the expression of ET-1. There was parasitism and myonecrosis in the myocardium of infected C57BL/6 mice. Reverse transcriptase polymerase chain reaction (RT-PCR) analysis revealed elevated mRNA expression of transcription factor AP-1 (c-jun and c-fos) and increased AP-1 DNA binding activity as determined by electrophoretic mobility shift assay (EMSA). Western blot analysis demonstrated an increase in the phosphorylated forms of extracellular signal-regulated kinase (ERK1/2). ET-1 mRNA was upregulated in the myocardium of infected mice. Immunohistochemical and immunoelectron microscopy using anti-ET-1 antibody detected increased expression in cardiac myocytes and endothelium of these mice. These data suggest that ET-1 contributes to chagasic cardiomyopathy and that the mechanism of the increased expression of ET-1 is a result of the activation of the MAPK pathway by T. cruzi infection.
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Affiliation(s)
- H Huang
- Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Abstract
Cytokeratin 7 (CK 7) and cytokeratin 20 (CK 20) are low molecular weight cytokeratins. Their anatomic distribution is generally restricted to epithelia and their neoplasms. We surveyed 435 epithelial neoplasms from various organ systems by immunohistochemistry using CK 7 and CK 20 monoclonal antibodies. Expression of CK 7 was seen in the majority of cases of carcinoma, with the exception of those carcinomas arising from the colon, prostate, kidney, and thymus; carcinoid tumors of the lung and gastrointestinal tract origin; and Merkel cell tumor of the skin. The majority of cases of squamous cell carcinoma of various origins were negative for CK 7, except cervical squamous cell carcinoma, in which 87% of cases were positive. Approximately two thirds of cases of malignant mesothelioma were CK 7-positive. CK 20 positivity was seen in virtually all cases of colorectal carcinomas and Merkel cell tumors. CK 20-positive staining was also observed in cases of pancreatic carcinomas (62%), gastric carcinoma (50%), cholangiocarcinomas (43%), and transitional cell carcinomas (29%). The expression of CK 20 was virtually absent in carcinomas from other organ systems and in malignant mesothelioma. CK 7- and CK 20-negative epithelial neoplasms included adrenal cortical carcinoma, germ cell tumor, prostate carcinoma, renal cell carcinoma, and hepatocellular carcinoma.
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Affiliation(s)
- P Chu
- Division of Pathology, City of Hope National Medical Center, Duarte, California 91010, USA
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