1
|
Xavier C, Morel I, Siegenthaler R, Dohme-Meier F, Dubois S, Luginbühl T, Le Cozler Y, Lerch S. Three-dimensional imaging to estimate in vivo body and carcass chemical composition of growing beef-on-dairy crossbred bulls. Animal 2024; 18:101174. [PMID: 38761441 DOI: 10.1016/j.animal.2024.101174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 05/20/2024] Open
Abstract
The dynamics of cattle body chemical composition during growth and fattening periods determine animal performance and beef carcass quality. The aim of this study was to estimate the empty body (EB) and carcass chemical composition of growing beef-on-dairy crossbred bulls (Brown Swiss breed as dam with Angus, Limousin or Simmental as sire) using three-dimensional (3D) imaging. The 3D images of the cattle's external body shape were recorded in vivo on 48 bulls along growth trajectory (75-520 kg BW and 34-306 kg hot carcass weight [HCW]; set 1) and on 70 bulls at target market slaughter weight, including 18 animals from set 1 (average 517 ± 10 kg BW and 289 ± 10 kg HCW; set 2). The linear, circumference, curve, surface and volume measurements on the 3D body shape were determined. Those predictive variables were used in partial least square regressions, together with the effect of the sire breed whenever significant (P < 0.05), with leave-one-out cross-validation to estimate water, lipid, protein, mineral and energy mass or proportions in the EB and carcass. Mass and proportions were determined directly from postmortem grinding and chemical analyses (set 1) or indirectly using the 11th rib dissection method (set 2). In set 1, bulls' BW and HCW were estimated via 3D imaging, with root mean square error of prediction (RMSEP) of 12 kg and 6 kg, respectively. The EB and carcass chemical component proportions were estimated with RMSEP from 0.2% for EB minerals (observed mean 3.7 ± 0.2%) to 1.8% for EB lipid (11.6 ± 4.2%), close to the RMSEP found for the carcass. In set 2, the RMSEP for estimation via 3D imaging was 9 kg for BW and 6 kg for HCW. The EB energy and protein proportions were estimated, with RMSEP of 0.5 MJ/kg fresh matter (10.1 ± 0.8 MJ/DM) and 0.2% (18.7 ± 0.7%), respectively. Overall, the estimations of chemical component proportions from 3D imaging were slightly less precise for both sets than the mass estimations. The morphological traits from the 3D images appeared to be precise estimators of BW, HCW as well as EB and carcass chemical component masses and proportions.
Collapse
Affiliation(s)
- C Xavier
- Ruminant Nutrition and Emissions, Agroscope, 1725 Posieux, Switzerland; PEGASE INRAE-Institut Agro Rennes-Angers, 16 Le Clos, 35590 Saint Gilles, France
| | - I Morel
- Ruminant Nutrition and Emissions, Agroscope, 1725 Posieux, Switzerland
| | - R Siegenthaler
- Research Contracts Animals Group, Agroscope, 1725 Posieux, Switzerland
| | - F Dohme-Meier
- Ruminant Nutrition and Emissions, Agroscope, 1725 Posieux, Switzerland
| | - S Dubois
- Feed Chemistry Research Group, Agroscope, 1725 Posieux, Switzerland
| | - T Luginbühl
- 3D Ouest, 5 rue de Broglie, 22300 Lannion, France
| | - Y Le Cozler
- PEGASE INRAE-Institut Agro Rennes-Angers, 16 Le Clos, 35590 Saint Gilles, France
| | - S Lerch
- Ruminant Nutrition and Emissions, Agroscope, 1725 Posieux, Switzerland.
| |
Collapse
|
2
|
Ruiz-Ramírez J, de la Puente M, Xavier C, Ambroa-Conde A, Álvarez-Dios J, Freire-Aradas A, Mosquera-Miguel A, Ralf A, Amory C, Katsara MA, Khellaf T, Nothnagel M, Cheung EYY, Gross TE, Schneider PM, Uacyisrael J, Oliveira S, Klautau-Guimarães MDN, Carvalho-Gontijo C, Pośpiech E, Branicki W, Parson W, Kayser M, Carracedo A, Lareu MV, Phillips C. Development and evaluations of the ancestry informative markers of the VISAGE Enhanced Tool for Appearance and Ancestry. Forensic Sci Int Genet 2023; 64:102853. [PMID: 36917866 DOI: 10.1016/j.fsigen.2023.102853] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 02/15/2023] [Accepted: 03/02/2023] [Indexed: 03/07/2023]
Abstract
The VISAGE Enhanced Tool for Appearance and Ancestry (ET) has been designed to combine markers for the prediction of bio-geographical ancestry plus a range of externally visible characteristics into a single massively parallel sequencing (MPS) assay. We describe the development of the ancestry panel markers used in ET, and the enhanced analyses they provide compared to previous MPS-based forensic ancestry assays. As well as established autosomal single nucleotide polymorphisms (SNPs) that differentiate sub-Saharan African, European, East Asian, South Asian, Native American, and Oceanian populations, ET includes autosomal SNPs able to efficiently differentiate populations from Middle East regions. The ability of the ET autosomal ancestry SNPs to distinguish Middle East populations from other continentally defined population groups is such that characteristic patterns for this region can be discerned in genetic cluster analysis using STRUCTURE. Joint cluster membership estimates showing individual co-ancestry that signals North African or East African origins were detected, or cluster patterns were seen that indicate origins from central and Eastern regions of the Middle East. In addition to an augmented panel of autosomal SNPs, ET includes panels of 85 Y-SNPs, 16 X-SNPs and 21 autosomal Microhaplotypes. The Y- and X-SNPs provide a distinct method for obtaining extra detail about co-ancestry patterns identified in males with admixed backgrounds. This study used the 1000 Genomes admixed African and admixed American sample sets to fully explore these enhancements to the analysis of individual co-ancestry. Samples from urban and rural Brazil with contrasting distributions of African, European, and Native American co-ancestry were also studied to gauge the efficiency of combining Y- and X-SNP data for this purpose. The small panel of Microhaplotypes incorporated in ET were selected because they showed the highest levels of haplotype diversity amongst the seven population groups we sought to differentiate. Microhaplotype data was not formally combined with single-site SNP genotypes to analyse ancestry. However, the haplotype sequence reads obtained with ET from these loci creates an effective system for de-convoluting two-contributor mixed DNA. We made simple mixture experiments to demonstrate that when the contributors have different ancestries and the mixture ratios are imbalanced (i.e., not 1:1 mixtures) the ET Microhaplotype panel is an informative system to infer ancestry when this differs between the contributors.
Collapse
Affiliation(s)
- J Ruiz-Ramírez
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M de la Puente
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - C Xavier
- Institute of Legal Medicine, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - A Ambroa-Conde
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - J Álvarez-Dios
- Faculty of Mathematics, University of Santiago de Compostela, 15705 Santiago de Compostela, Spain
| | - A Freire-Aradas
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - A Mosquera-Miguel
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - A Ralf
- Department of Genetic Identification, Erasmus MC, University Medical Center Rotterdam, 3015 CN Rotterdam, South Holland, the Netherlands
| | - C Amory
- Institute of Legal Medicine, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - M A Katsara
- Cologne Center for Genomics, University of Cologne, 50823 Cologne, Germany
| | - T Khellaf
- Cologne Center for Genomics, University of Cologne, 50823 Cologne, Germany
| | - M Nothnagel
- Cologne Center for Genomics, University of Cologne, 50823 Cologne, Germany; University Hospital Cologne, 50937 Cologne, Germany
| | - E Y Y Cheung
- Institute of Legal Medicine, Faculty of Medicine and University Clinic, University of Cologne, 50823 Cologne, Germany
| | - T E Gross
- Institute of Legal Medicine, Faculty of Medicine and University Clinic, University of Cologne, 50823 Cologne, Germany
| | - P M Schneider
- Institute of Legal Medicine, Faculty of Medicine and University Clinic, University of Cologne, 50823 Cologne, Germany
| | - J Uacyisrael
- Fiji Police Forensic Biology and DNA Laboratory, Nasova, Suva, Fiji
| | - S Oliveira
- Departamento Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brazil
| | | | - C Carvalho-Gontijo
- Departamento Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brazil
| | - E Pośpiech
- Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - W Branicki
- Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387 Kraków, Poland
| | - W Parson
- Institute of Legal Medicine, Medical University of Innsbruck, 6020 Innsbruck, Austria; Forensic Science Program, The Pennsylvania State University, University Park, State College, PA 16802, USA
| | - M Kayser
- Department of Genetic Identification, Erasmus MC, University Medical Center Rotterdam, 3015 CN Rotterdam, South Holland, the Netherlands
| | - A Carracedo
- Fundación Pública Galega de Medicina Xenómica (FPGMX), Instituto de Investigación Sanitaria (IDIS),15706 Santiago de Compostela, Spain; Genomics Group, CIBERER, CIMUS, University of Santiago de Compostela, Spain
| | - M V Lareu
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - C Phillips
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| |
Collapse
|
3
|
Xavier C, de la Puente M, Mosquera-Miguel A, Freire-Aradas A, Kalamara V, Ralf A, Revoir A, Gross T, Schneider P, Ames C, Hohoff C, Phillips C, Kayser M, Parson W. Development and inter-laboratory evaluation of the VISAGE Enhanced Tool for Appearance and Ancestry inference from DNA. Forensic Sci Int Genet 2022; 61:102779. [DOI: 10.1016/j.fsigen.2022.102779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/14/2022] [Accepted: 09/18/2022] [Indexed: 11/30/2022]
|
4
|
Xavier C, Le Cozler Y, Depuille L, Caillot A, Lebreton A, Allain C, Delouard J, Delattre L, Luginbuhl T, Faverdin P, Fischer A. The use of 3-dimensional imaging of Holstein cows to estimate body weight and monitor the composition of body weight change throughout lactation. J Dairy Sci 2022; 105:4508-4519. [DOI: 10.3168/jds.2021-21337] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/06/2022] [Indexed: 11/19/2022]
|
5
|
Heidegger A, Pisarek A, de la Puente M, Niederstätter H, Pośpiech E, Woźniak A, Schury N, Unterländer M, Sidstedt M, Junker K, Ventayol Garcia M, Laurent FX, Ulus A, Vannier J, Bastisch I, Hedman J, Sijen T, Branicki W, Xavier C, Parson W. Development and inter-laboratory validation of the VISAGE enhanced tool for age estimation from semen using quantitative DNA methylation analysis. Forensic Sci Int Genet 2021; 56:102596. [PMID: 34763164 DOI: 10.1016/j.fsigen.2021.102596] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/27/2022]
Abstract
The analysis of DNA methylation has become an established method for chronological age estimation. This has triggered interest in the forensic community to develop new methods for age estimation from biological crime scene material. Various assays are available for age estimation from somatic tissues, the majority from blood. Age prediction from semen requires different DNA methylation markers and the only assays currently developed for forensic analysis are based on SNaPshot or pyrosequencing. Here, we describe a new assay using massively parallel sequencing to analyse 13 candidate CpG sites targeted in two multiplex PCRs. The assay has been validated by five consortium laboratories of the VISible Attributes through GEnomics (VISAGE) project within a collaborative exercise and was tested for reproducible quantification of DNA methylation levels and sensitivity with DNA methylation controls. Furthermore, DNA extracts and stains on Whatman FTA cards from two semen samples were used to evaluate concordance and mimic casework samples. Overall, the assay yielded high read depths (> 1000 reads) at all 13 marker positions. The methylation values obtained indicated robust quantification with an average standard deviation of 2.8% at the expected methylation level of 50% across the 13 markers and a good performance with 50 ng DNA input into bisulfite conversion. The absolute difference of quantifications from one participating laboratory to the mean quantifications of concordance and semen stains of remaining laboratories was approximately 1%. These results demonstrated the assay to be robust and suitable for age estimation from semen in forensic investigations. In addition to the 13-marker assay, a more streamlined protocol combining only five age markers in one multiplex PCR was developed. Preliminary results showed no substantial differences in DNA methylation quantification between the two assays, indicating its applicability with the VISAGE age model for semen developed with data from the complete 13-marker tool.
Collapse
Affiliation(s)
- A Heidegger
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - A Pisarek
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - M de la Puente
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria; Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - H Niederstätter
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - E Pośpiech
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - A Woźniak
- Central Forensic Laboratory of the Police, Warsaw, Poland
| | - N Schury
- Federal Criminal Police Office, Wiesbaden, Germany
| | | | - M Sidstedt
- National Forensic Centre (NFC), Swedish Police Authority, Linköping, Sweden
| | - K Junker
- National Forensic Centre (NFC), Swedish Police Authority, Linköping, Sweden
| | - M Ventayol Garcia
- Biological Traces, Netherlands Forensic Institute, Laan van Ypenburg 6, 2497 GB The Hague, The Netherlands
| | - F X Laurent
- Institut National de Police Scientifique, Laboratoire de Police Scientifique de Lyon, Ecully Cedex, France
| | - A Ulus
- Institut National de Police Scientifique, Laboratoire de Police Scientifique de Lyon, Ecully Cedex, France
| | - J Vannier
- Institut National de Police Scientifique, Laboratoire de Police Scientifique de Lyon, Ecully Cedex, France
| | - I Bastisch
- Federal Criminal Police Office, Wiesbaden, Germany
| | - J Hedman
- National Forensic Centre (NFC), Swedish Police Authority, Linköping, Sweden; Applied Microbiology, Department of Chemistry, Lund University, Lund, Sweden
| | - T Sijen
- Biological Traces, Netherlands Forensic Institute, Laan van Ypenburg 6, 2497 GB The Hague, The Netherlands; University of Amsterdam, Swammerdam Institute of Life Sciences, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - W Branicki
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland; Central Forensic Laboratory of the Police, Warsaw, Poland
| | - C Xavier
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria.
| | - W Parson
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria; Forensic Science Program, The Pennsylvania State University, State College, PA, USA.
| | | |
Collapse
|
6
|
Xavier C, de la Puente M, Phillips C, Eduardoff M, Heidegger A, Mosquera-Miguel A, Freire-Aradas A, Lagace R, Wootton S, Power D, Parson W, Lareu MV, Daniel R. Forensic evaluation of the Asia Pacific ancestry-informative MAPlex assay. Forensic Sci Int Genet 2020; 48:102344. [PMID: 32615397 DOI: 10.1016/j.fsigen.2020.102344] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/22/2020] [Accepted: 06/15/2020] [Indexed: 01/21/2023]
Abstract
DNA intelligence, and particularly the inference of biogeographical ancestry (BGA) is increasing in interest, and relevance within the forensic genetics community. The majority of current MPS-based forensic ancestry-informative assays focus on the differentiation of major global populations. The recently published MAPlex (Multiplex for the Asia Pacific) panel contains 144 SNPs and 20 microhaplotypes and aims to improve the differentiation of populations in the Asia Pacific region. This study reports the first forensic evaluation of the MAPlex panel using AmpliSeq technology and Ion S5 sequencing. This study reports on the overall performance of MAPlex including the assay's sequence coverage distribution and stability, baseline noise and description of problematic SNPs. Dilution series, artificially degraded and mixed DNA samples were also analysed to evaluate the sensitivity of the panel with challenging or compromised forensic samples. As the first panel to combine biallelic SNPs, multiple-allele SNPs and microhaplotypes, the MAPlex assay demonstrated an enhanced capacity for mixture detection, not easily performed with common binary SNPs. This performance evaluation indicates that MAPlex is a robust, stable and highly sensitive assay that is applicable to forensic casework for the prediction of BGA.
Collapse
Affiliation(s)
- C Xavier
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria.
| | - M de la Puente
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria; Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - C Phillips
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - M Eduardoff
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - A Heidegger
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - A Mosquera-Miguel
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - A Freire-Aradas
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - R Lagace
- Human Identification Group, Thermo Fisher Scientific, CA, USA
| | - S Wootton
- Human Identification Group, Thermo Fisher Scientific, CA, USA
| | - D Power
- Thermo Fisher Scientific, Victoria, Australia
| | - W Parson
- Institute of Legal Medicine, Medical University of Innsbruck, Innsbruck, Austria; Forensic Science Program, The Pennsylvania State University, University Park, PA, USA
| | - M V Lareu
- Forensic Genetics Unit, Institute of Forensic Sciences, University of Santiago de Compostela, Spain
| | - R Daniel
- Office of the Chief Forensic Scientist, Forensic Services Department, Victoria Police, Macleod, Australia; National Centre for Forensic Studies, Faculty of Science & Technology, University of Canberra, ACT, Australia
| |
Collapse
|
7
|
Abstract
IntroductionHomelessness is a problem which affects all the areas of those who suffer it, affecting their health seriously. These risks increase when the affected person has carried out a migratory process. Another risk factor, apart from immigration, is to be woman.ObjectivesTo analyse the gender demographic differences in a total cohort of homeless people in the city of Girona in 2006 and continued until the present day.MethodsProspective longitudinal study of the total population of homeless people in Girona. In 2006, a list was made of all the homeless people detected by both specialized and non-specialized teams which have been followed until the present day.ResultsThe total number of women in the sample is lower (n = 106, 11.2%). There are fewer immigrant than autochthonous women (Chi2 = 23,1, df = 1, P < 0.001).After following the total homeless population in 2006, we can confirm that currently we can still identify 62 people in the territory (6.7%). In this subsample there are no differences between genders (man: n = 54, 6.5% vs. woman: n = 8, 7.5%; Chi2 = 0.21, df = 2, P = 0.89). That is, men and women remain in their homeless condition in a proportional way. This fact presents great limitations, since we do not know what happened with the other 93% of the initial sample.ConclusionsThe masculinisation of the homeless people from Maghreb has tended to increase the gender differences in the homeless population, in itself more masculine. This presents a risk of increasing the invisibility of homeless women.Disclosure of interestThe authors have not supplied their declaration of competing interest.
Collapse
|
8
|
Keyaerts M, Xavier C, Everaert H, Vaneycken I, Fontaine C, Decoster L, Vanhoeij M, Caveliers V, Lahoutte T. Phase II trial of HER2-PET/CT using 68Ga-anti-HER2 VHH1 for characterization of HER2 presence in brain metastases of breast cancer patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz095.081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
9
|
Cadavez VAP, Xavier C, Gonzales-Barron U. Classification of beef carcasses from Portugal using animal characteristics and pH/temperature decline descriptors. Meat Sci 2019; 153:94-102. [PMID: 30913413 DOI: 10.1016/j.meatsci.2019.03.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 03/05/2019] [Accepted: 03/12/2019] [Indexed: 10/27/2022]
Abstract
Previous research showed that meat of optimal tenderness is produced when rigor mortis temperature falls between 12 - 35 °C. This study aimed to classify beef carcasses quality according to the ideal window rule using pH/temperature decay descriptors and animal characteristics. Seventy-four Mirandesa breed and 52 Crossbreds, with an average age of 10.1 ± 2.32 months, were slaughtered at one abattoir located in the Northeast of Portugal. Carcass temperature and pH, logged during 24 h post-mortem, were modelled by exponential decay equations that estimated temperature (kT) and pH (kpH) decay rates. Additionally, other pH/temperature descriptors were estimated from the fitted models. From linear models adjusted to each descriptor, it was found that hot carcass weight, age, breed, gender, age class, fat cover, conformation and transport and lairage time had influence (P < 0.05) on pH and temperature decay rates. Thus, combining the variables kT and kpH, and selected animal/carcass characteristics as linear predictors, a system to classify quality of carcasses was developed.
Collapse
Affiliation(s)
- V A P Cadavez
- CIMO Mountain Research Center, School of Agriculture, Polytechnic Institute of Braganza, Portugal.
| | - C Xavier
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal; REQUIMTE, LAQV, DGAOT, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - U Gonzales-Barron
- CIMO Mountain Research Center, School of Agriculture, Polytechnic Institute of Braganza, Portugal
| |
Collapse
|
10
|
Ingold S, Dørum G, Hanson E, Berti A, Branicki W, Brito P, Elsmore P, Gettings K, Giangasparo F, Gross T, Hansen S, Hanssen E, Kampmann ML, Kayser M, Laurent FX, Morling N, Mosquera-Miguel A, Parson W, Phillips C, Porto M, Pośpiech E, Roeder A, Schneider P, Schulze Johann K, Steffen C, Syndercombe-Court D, Trautmann M, van den Berge M, van der Gaag K, Vannier J, Verdoliva V, Vidaki A, Xavier C, Ballantyne J, Haas C. Body fluid identification using a targeted mRNA massively parallel sequencing approach – results of a EUROFORGEN/EDNAP collaborative exercise. Forensic Sci Int Genet 2018; 34:105-115. [DOI: 10.1016/j.fsigen.2018.01.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 11/17/2017] [Accepted: 01/05/2018] [Indexed: 11/30/2022]
|
11
|
Simão F, Ferreira A, Vullo C, Xavier C, Huber G, Quiroz A, Machado P, Velázquez V, Carvalho E, Gusmão L, Parson W. Paraguay: Unveiling migration patterns with ancestry genetic markers. Forensic Science International: Genetics Supplement Series 2017. [DOI: 10.1016/j.fsigss.2017.09.104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
12
|
Calvo F, Giralt C, Xavier C. Homelessness and Immigrants: In Front of the Border Between Spain and France. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
IntroductionIn 2006, prior to the worldwide economic crisis which especially affected Western countries, Southern Spain was one of the illegal immigrant gateways from Africa into Europe. The aim of this study is to establish the rate of homeless immigrants in a cohort of 2006 and carry out a follow up until 2015 in order to explore the chronicity associated to the territory.MethodsSample: 949 persons experiencing homelessness in Girona, according to official records. Procedure: prospective longitudinal study of the total population of homeless people in Girona. In 2006, a list was made of all the homeless people detected by both specialised and nonspecialised teams, which have been followed until the present day. Instruments: data bases of different official teams. Statistical analysis: measures of central tendency and dispersion and contingency tables were used for the comparison of qualitative variables.ResultsOverall, 64.8% of the population of Girona are immigrants (n = 614), principally from the Maghreb, (χ2 = 36.9, df = 4, P < .001) and 333 (36.3%) are autochthonous. The percentage of homeless immigrants in relation to the total immigrant population was 4.4%. Comparing the homeless autochthonous population with the total of the autochthonous population, homelessness among autochthonous population was 0.4%.ConclusionsThe results suggest that homelessness was more incidental in the immigrant group than in the autochthonous group. The percentage of immigrants who still live in homeless conditions suggests that immigration is a risk factor in the chronicity of the problem.Disclosure of interestThe authors have not supplied their declaration of competing interest.
Collapse
|
13
|
Bispo S, Xavier C, Caiaffa W, Proietti F. Convergence of Overweight and Undernutrition in Urban Adolescents and the Dissonance of Correlated Factors; a Transition? Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
14
|
Andrade R, Costa D, Bispo S, Ramos C, Reis P, Chaves O, Xavier C, Proietti F, Correia MI, Friche A, Caiaffa W. Typology of Families Living in Urban areas and Obesity: One Family does not Fit all. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
15
|
Brackeva B, De Punt V, Kramer G, Costa O, Verhaeghen K, Stangé G, Sadones J, Xavier C, Aerts JMFG, Gorus FK, Martens GA. Potential of UCHL1 as biomarker for destruction of pancreatic beta cells. J Proteomics 2015; 117:156-67. [PMID: 25638021 DOI: 10.1016/j.jprot.2015.01.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 12/09/2014] [Accepted: 01/09/2015] [Indexed: 01/08/2023]
Abstract
UNLABELLED There is a clinical need for plasma tests for real-time detection of beta cell destruction, as surrogate endpoint in islet transplantation and immunoprevention trials in type 1 diabetes. This study reports on the use of label-free LC-MS/MS proteomics for bottom-up selection of candidate biomarkers. Ubiquitin COOH-terminal hydrolase 1 (UCHL1) was identified as abundant protein in rat and human beta cells, showing promising beta cell-selectivity, and was selected for further validation in standardized toxicity models. In vitro, H2O2-induced necrosis of INS-1 cells and human islets resulted in intracellular UCHL1 depletion and its extracellular discharge. In vivo, streptozotocin progressively depleted UCHL1 from islet cores and in 50% of animals, an associated plasma UCHL1 surge was detected preceding the GAD65 peak. UCHL1 was cleared with a half-life of 20min. Whole-body dynamic planar imaging of (99m)-Technetium-labeled UCHL1 indicated a rapid UCHL1 uptake in the liver and spleen, followed by urinary excretion of mainly proteolytic UCHL1 fragments. We conclude that LC-MS/MS proteomics is a useful tool to prioritize biomarkers for beta cell injury with promising molar abundance. Despite its consistent UCHL1 discharge by damaged beta cells in vitro, its in vivo use might be restrained by its rapid elimination from plasma. BIOLOGICAL SIGNIFICANCE Our bottom-up LC-MS/MS proteomics represents a pragmatic approach to identify protein-type biomarkers of pancreatic beta cell injury. UCHL1 successfully passed sequential validation steps of beta cell-selectivity, antigenicity and toxic discharge in vitro. Whole-body dynamic planar imaging of radiolabeled recombinant UCHL1 indicated rapid clearance through the liver, spleen and urinary excretion of proteolytic fragments, likely explaining non-consistent detection in vivo. Integration of kinetic biomarker clearance studies in the a priori selection criteria is recommended before engaging in resource-intensive custom development of sensitive immunoassays for clinical translation.
Collapse
Affiliation(s)
- B Brackeva
- Diabetes Research Center, Vrije Universiteit Brussel (VUB), Belgium; Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium
| | - V De Punt
- Diabetes Research Center, Vrije Universiteit Brussel (VUB), Belgium; Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium
| | - G Kramer
- Department of Medical Biochemistry, Academisch Medisch Centrum, Amsterdam, Netherlands
| | - O Costa
- Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium
| | - K Verhaeghen
- Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium
| | - G Stangé
- Diabetes Research Center, Vrije Universiteit Brussel (VUB), Belgium
| | - J Sadones
- Department of Anatomopathology, Universitair Ziekenhuis Brussel, Belgium
| | - C Xavier
- In Vivo Cellular and Molecular Imaging Laboratory (ICMI), Vrije Universiteit Brussel (VUB), Belgium
| | - J M F G Aerts
- Department of Medical Biochemistry, Academisch Medisch Centrum, Amsterdam, Netherlands
| | - F K Gorus
- Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium
| | - G A Martens
- Diabetes Research Center, Vrije Universiteit Brussel (VUB), Belgium; Department of Clinical Chemistry and Radio-immunology, Universitair Ziekenhuis Brussel, Belgium.
| |
Collapse
|
16
|
Schmutzler D, Khanicheh E, Xu L, Mitterhuber M, Glatz K, Ellertsdottir E, Kaufmann B, Bala G, Blykers A, Xavier C, Gillis K, Tierens S, Descamps B, Vanhove C, Lahoutte T, Cosyns B, Hernot S, Ferferieva V, Deluyker D, Arslan T, Lambrichts I, Rigo J, Bito V, Sanz M, Sitges M, Bijnens B, Rubies C, Batlle M, Mont L, Brugada J, Guasch E. Young Investigator Award session - Basic Science: Thursday 4 December 2014, 10:00-11:00 * Location: Agora. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
17
|
Xavier C, Gonzales-Barron U, Paula V, Estevinho L, Cadavez V. Meta-analysis of the incidence of foodborne pathogens in Portuguese meats and their products. Food Res Int 2014. [DOI: 10.1016/j.foodres.2013.11.024] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
18
|
Leila K, Lopes M, Ferreira B, Xavier C. EP-1012: Head and neck imrt treatments: six years experience. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33318-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Oliveira SG, Cabral-de-Mello DC, Arcanjo AP, Xavier C, Souza MJ, Martins C, Moura RC. Heterochromatin, Sex Chromosomes and rRNA Gene Clusters inCoprophanaeusBeetles (Coleoptera, Scarabaeidae). Cytogenet Genome Res 2012; 138:46-55. [PMID: 22797215 DOI: 10.1159/000339648] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2012] [Indexed: 01/01/2023] Open
Affiliation(s)
- S G Oliveira
- Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista/UNESP, Botucatu, Brazil
| | | | | | | | | | | | | |
Collapse
|
20
|
Caiaffa W, Souza A, Goston J, Dayrell A, Xavier C, Comini C, Proietti F. SP4-29 Neighbourhood-based differences in physical activity: a deprived urban neighbourhood program approach (fitness centers--FCs) for reducing social inequalities in chronic diseases: preliminary comparisons. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976p.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
21
|
Affiliation(s)
- C Xavier
- University of California, Irvine School of Medicine, Pediatric Surgery, Orange, California, USA
| | | |
Collapse
|
22
|
Philippe B, Genevieve R, Nadine D, Josh R, Xavier C. 198 Evaluate to prevent medication errors in anaesthesia. BMJ Qual Saf 2010. [DOI: 10.1136/qshc.2010.041632.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
23
|
Angel RM, Maria V, Jesus B, Nicolau C, Cinta BM, Xavier C. Metabolomics Platform: a useful tool for the study of diabetes and metabolic disorders. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
24
|
Maria V, Ángel RM, Anna R, Cinta BM, Jesús B, Nicolau C, Jorge J, Xavier C. An NMR-based quantitative metabolomics approach to the study of endogenous liver metabolites variation on genetically modified mice. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
25
|
Castilho G, Xavier C, Nakandakare E, Laurindo F, Passarelli M. Abstract: P713 IN VITRO MACROPHAGE GLYCOXIDATION INDUCES CHOLESTEROL ACCUMULATION DUE TO RETICULUM ENDOPLASMIC STRESS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70881-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
26
|
|
27
|
Belmonte M, Xavier C, Decap J, Martinez M, Sierra-Alvarez R, Vidal G. Improved aerobic biodegradation of abietic acid in ECF bleached kraft mill effluent due to biomass adaptation. J Hazard Mater 2006; 135:256-63. [PMID: 16386835 DOI: 10.1016/j.jhazmat.2005.11.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Revised: 11/18/2005] [Accepted: 11/21/2005] [Indexed: 05/06/2023]
Abstract
Kraft pulp mill effluents contain elevated concentrations of resin acids, chiefly abietic and dehydroabietic acid, and other lipophilic wood constituents. Resin acids, if not efficiently removed during wastewater treatment, can be responsible for chronic toxicity in aquatic systems. The objective of this study was to investigate the biological removal of abietic acid (AbA) during the treatment of elemental chlorine free (ECF) kraft mill effluents in aerobic lagoons and to assess its improvement with time as a result of biomass adaptation. Under these conditions, the average removal efficiencies of AbA and BOD(5) attained in the aerobic lagoon were high and exceeded 80% and 95%, respectively. Microbial inhibition of non-acclimated and acclimated biomass by AbA was not detected in batch bioassays. Kinetic studies showed that the K(s) and V(m) values equalled 76.7 mg AbA/l and 0.011 l/h, respectively, for the non-acclimated biomass, and 1678 mg AbA/l and 0.13 l/h, respectively, for the acclimated biomass.
Collapse
Affiliation(s)
- M Belmonte
- Environmental Science Centre, EULA-Chile, Universidad de Concepcion, P.O. Box 160-C, Concepcion, Chile
| | | | | | | | | | | |
Collapse
|
28
|
Xavier C, Chamorro S, Vidal G. Chronic effects of kraft mill effluents and endocrine active chemicals on Daphnia magna. Bull Environ Contam Toxicol 2005; 75:670-6. [PMID: 16400546 DOI: 10.1007/s00128-005-0804-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2005] [Accepted: 07/22/2005] [Indexed: 05/06/2023]
Affiliation(s)
- C Xavier
- Environmental Science Center EULA-Chile, University of Concepción, 160-C, Concepción, Chile
| | | | | |
Collapse
|
29
|
Bennasser Y, Yamina B, Contreras X, Xavier C, Moreau M, Marc M, Le Clerc C, Catherine L, Badou A, Abdallah B, Bahraoui E. [HIV-1 Tat protein induces IL-10 production by human monocytes: implications of the PKC and calcium pathway]. J Soc Biol 2002; 195:319-26. [PMID: 11833470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
In asymptomatic patients infected by HIV-1, the level of IL-10, a cytokine with immunosuppressive activity, is associated with the course of HIV infection towards AIDS. We show that HIV-1 Tat, a viral protein secreted by infected cells, induces IL-10 production by human peripheral blood monocytes. The analysis of the signal transduction pathways strongly suggests that the protein kinase C may play an essential role in this induction. Stimulation by Tat induces nuclear translocation of the transcription factor NFkB the activation of which seems to be necessary for IL-10 production. Using microspectrofluorimetry and confocal microscopy, we also show that Tat induces a calcium influx.
Collapse
Affiliation(s)
- Y Bennasser
- Laboratoire d'Immuno-Virologie, Université Paul Sabatier 118, route de Narbonne, 31062 Toulouse
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Wiebeck H, Borrelly D, Xavier C, Santos P, Asciutti S, Corrêa M. The Effect of Silane Coupling Agents on a Composite Polyamide-6/Talc. Braz J Chem Eng 1998. [DOI: 10.1590/s0104-66321998000400009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
31
|
Nagaratnam N, Xavier C, Fabian R. Functional Outcome of Patients with Parietal Lobe Stroke. Neurorehabil Neural Repair 1997. [DOI: 10.1177/154596839701100303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
32
|
Chiron M, Jaffrezou JP, Carayon P, Bordier C, Roubinet F, Xavier C, Brandely M, Laurent G. Induction and increase of HLA-DR antigen expression by immune interferon on ML-3 cell line enhances the anti-HLA-DR immunotoxin activity. Clin Exp Immunol 1990; 82:214-20. [PMID: 2122930 PMCID: PMC1535130 DOI: 10.1111/j.1365-2249.1990.tb05429.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
In order to evaluate the impact of induction and increase target antigen expression on immunotoxin potency, we measured the potentiating effect of recombinant immune interferon-gamma (rIFN-gamma) on the cytotoxicity of an anti HLA-DR ricin A-chain immunotoxin (2G5 RTA-IT) on the myeloid cell line ML-3. After 48 h of incubation with rIFN-gamma (500 U/ml) the percentage of 2G5-positive cells increased from 40% to 79%, and the 2G5 mean density was enhanced by 10-fold (11,000 versus 110,000 molecules/cell). Concurrently, rIFN-gamma pretreatment induced a dramatic improvement of 2G5 RTA-IT dose-effect cytotoxicity, as well as immunotoxin cytotoxicity kinetics. When 2G5 RTA-IT was used at the optimal dose of 10(-8)M (the maximum dose which avoided non-specific ricin A-chain cytotoxicity), the immunotoxin-induced cell kill increased with the percentage of DR-positive ML-3 cells according to a similar linear-logarithmic function of rIFN-gamma concentration. Moreover, in the same range of rIFN-gamma concentrations, the killing values and the percentage of DR-positive ML-3 cells were similar if not identical. These findings imply that the enhancement of 2G5 RTA-IT cytotoxicity by rIFN-gamma is mainly related to the rIFN-gamma 2G5 antigen induction on HLA-DR negative cells when immunotoxin was used at 10(-8) M. Furthermore, 2G5 RTA-IT dose-effect cytotoxicity on DR-expressing ML-3 cells, when used at lower concentrations, was also increased by rIFN-gamma in a dose-dependent manner. This result suggests that for immunotoxin concentrations close to the limiting membrane saturation dose (10(-10)M), rIFN-gamma may not solely act by inducing HLA-DR expression on DR-negative ML-3 subpopulation but also by increasing individual cellular DR density on DR expressing ML-3 cells. Finally, our study showed that immunotoxin potency on malignant cell populations which display an heterogeneous antigen expression, could be greatly improved by the use of rIFN-gamma.
Collapse
Affiliation(s)
- M Chiron
- Laboratory of Pharmacology and Toxicology, CNRS, Toulouse, France
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Christo GG, Murthy VS, Kapadia RD, Xavier C, Venkatesh A. Short-rib polydactyly syndrome type 1 (Saldino-Noonan). Indian Pediatr 1987; 24:585-8. [PMID: 3692589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
34
|
Chisari FV, Castle KL, Xavier C, Anderson DS. Functional properties of lymphocyte subpopulations in hepatitis B virus infection. I. Suppressor cell control of T lymphocyte responsiveness. J Immunol 1981; 126:38-44. [PMID: 6450240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Hepatocellular injury in hepatitis B virus infection may be produced by an autoaggressive hepatocytotoxic immune response. To test the hypothesis that acquired suppressor cell defects may participate in such a response, we assessed the functional integrity of 2 suppressor cell populations in patients with type B viral hepatitis. Spontaneous suppression of the 1-way mixed lymphocyte response by radiation-resistant, adherent peripheral blood mononuclear cells decreases during the acute phase of disease, returns towards normal with clinical recovery, but remains depressed in patients with chronic hepatitis. The degree of spontaneous suppressor cell dysfunction correlates inversely with at least 1 biochemical parameter of hepatocellular injury (SGPT). The functional integrity of this suppressor cell fluctuates during chronic hepatitis and may reflect currently undefined biologic variables in this disease. Mitogen-induced suppression on lymphocyte activation by radiation resistant, nonadherent suppressor cells is also depressed in acute and chronic hepatitis, but it does not correlate with biochemical evidence of hepatocellular injury on an individual-patient basis. Documentation of these generalized defects of nonspecific suppressor cell function establishes a basis for the possible existence of specific anomalies of immuno-regulation that may permit the expression of normally suppressed auoaggressive hepatocytotoxic immune mechanisms in viral hepatitis.
Collapse
|
35
|
Chisari FV, Bieber MS, Josepho CA, Xavier C, Anderson DS. Functional properties of lymphocyte subpopulations in hepatitis B virus infection. II. Cytotoxic effector cell killing of targets that naturally express hepatitis B surface antigen and liver-specific lipoprotein. J Immunol 1981; 126:45-9. [PMID: 6450241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Cytotoxic effector cell responsiveness to host and/or virus-determined hepatocyte surface membrane antigens has been postulated as an important pathogenetic determinant of hepatocellular injury in hepatitis B virus infection. Assuming that such effector cell populations would be detectable in peripheral blood, the present study was designed to examine 2 questions: first, whether target cells that normally express liver-specific protein (LSP) and hepatitis B surface antigen (HBsAg) are selectively destroyed by peripheral blood effector cells from patients with viral hepatitis; second, whether cytotoxic effector cell function emerges coincident with the development of defective suppressor cell activity in the same patients. No evidence of increased HBsAg or LSP specific cytotoxic effector cell activity was found in the peripheral blood natural killer (NK) or T killer cell populations of patients with acute or chronic viral hepatitis.
Collapse
|
36
|
Chisari FV, Bieber MS, Josepho CA, Xavier C, Anderson DS. Functional properties of lymphocyte subpopulations in hepatitis B virus infection. II. Cytotoxic effector cell killing of targets that naturally express hepatitis B surface antigen and liver-specific lipoprotein. The Journal of Immunology 1981. [DOI: 10.4049/jimmunol.126.1.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Cytotoxic effector cell responsiveness to host and/or virus-determined hepatocyte surface membrane antigens has been postulated as an important pathogenetic determinant of hepatocellular injury in hepatitis B virus infection. Assuming that such effector cell populations would be detectable in peripheral blood, the present study was designed to examine 2 questions: first, whether target cells that normally express liver-specific protein (LSP) and hepatitis B surface antigen (HBsAg) are selectively destroyed by peripheral blood effector cells from patients with viral hepatitis; second, whether cytotoxic effector cell function emerges coincident with the development of defective suppressor cell activity in the same patients. No evidence of increased HBsAg or LSP specific cytotoxic effector cell activity was found in the peripheral blood natural killer (NK) or T killer cell populations of patients with acute or chronic viral hepatitis.
Collapse
|
37
|
Chisari FV, Castle KL, Xavier C, Anderson DS. Functional properties of lymphocyte subpopulations in hepatitis B virus infection. I. Suppressor cell control of T lymphocyte responsiveness. The Journal of Immunology 1981. [DOI: 10.4049/jimmunol.126.1.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Hepatocellular injury in hepatitis B virus infection may be produced by an autoaggressive hepatocytotoxic immune response. To test the hypothesis that acquired suppressor cell defects may participate in such a response, we assessed the functional integrity of 2 suppressor cell populations in patients with type B viral hepatitis. Spontaneous suppression of the 1-way mixed lymphocyte response by radiation-resistant, adherent peripheral blood mononuclear cells decreases during the acute phase of disease, returns towards normal with clinical recovery, but remains depressed in patients with chronic hepatitis. The degree of spontaneous suppressor cell dysfunction correlates inversely with at least 1 biochemical parameter of hepatocellular injury (SGPT). The functional integrity of this suppressor cell fluctuates during chronic hepatitis and may reflect currently undefined biologic variables in this disease. Mitogen-induced suppression on lymphocyte activation by radiation resistant, nonadherent suppressor cells is also depressed in acute and chronic hepatitis, but it does not correlate with biochemical evidence of hepatocellular injury on an individual-patient basis. Documentation of these generalized defects of nonspecific suppressor cell function establishes a basis for the possible existence of specific anomalies of immuno-regulation that may permit the expression of normally suppressed auoaggressive hepatocytotoxic immune mechanisms in viral hepatitis.
Collapse
|