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Martínez-Alarcón L, Ríos A, Ramis G, Gómez-Laguna J, Moll X, Falceto V, San Román-Acaso F, San Román-Llorens F, Quereda JJ, Herrero-Medrano JM, Mendonça L, Martin-Barrasa JL, Fernández OM, López-Navas AI, Hernández AM, Muñoz A, Ramírez P, Parrilla P. Attitude Toward Organ Donation and Transplantation in Veterinary Students: A Multicenter and Stratified Study in Spain. Transplant Proc 2018; 50:362-365. [PMID: 29579804 DOI: 10.1016/j.transproceed.2017.11.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 11/11/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Veterinarians often hold decision-making positions in the public health care system and can therefore influence public opinion about organ donation and transplantation (ODT). The aim of this work was to analyze the attitude of Spanish veterinary students toward ODT, because they may influence public opinion in the future, and to determine the factors that condition it. METHODS This was a sociologic, interdisciplinary, multicenter, observational study in Spain. The study population was students studying for a veterinary degree in Spain (n = 9000), and a sample of 2815 students (confidence of 99% and precision of ±1%) was stratified by geographic area and academic year. A validated questionnaire of attitude toward ODT (PCID-DTO-Ríos) was self-administered and anonymous. RESULTS Of the 2815 selected students (2790 plus the 0.9% per type of sample), 2650 completed the questionnaire (response rate, 94.14%): 83% (n = 2207) of the respondents were in favor of donation and 17% against. The following main variables were related to a favorable attitude: being female (odds ratio [OR], 0.752; P = .034); knowing a donor (OR, 1.834; P = .003); having discussed the matter with one's family (OR, 1.587; P = .002); having spoken about the subject in social circles with friends (OR, 1.633; P < .001), and being in favor of donating a deceased family member's organs (OR, 2.403; P < .001). CONCLUSIONS Seventeen percent of Spanish veterinary students were not in favor of ODT. It is important to know the factors that determine their attitude, because this will make it possible to optimize the resources invested in campaigns to promote ODT and to take more specific action.
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Affiliation(s)
- L Martínez-Alarcón
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain
| | - A Ríos
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain.
| | - G Ramis
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain; Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - J Gómez-Laguna
- Departament of Anatomy and Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - X Moll
- Departamento de Medicina y Cirugía Animal, Facultad Veterinaria, Universitat Autonoma Barcelona, Barcelona, Spain
| | - V Falceto
- Departamento de Patología Animal, Facultad de Veterinaria, Universidad de Zaragoza, Zaragoza, Spain
| | | | | | - J J Quereda
- Grupo Fisiopatología de la Reproducción, Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, Valencia, Spain
| | - J M Herrero-Medrano
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - L Mendonça
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiania, Brazil
| | - J L Martin-Barrasa
- Experimental Animal Facility, Research Unit, Hospital Universitario de Gran Canaria, Dr Negrín, Las Palmas de Gran Canaria, Spain; Animal Infectious Diseases and Ictiopatology, University Institute of Animal Health, University of Las Palmas de Gran Canaria, Arucas, Spain
| | - O M Fernández
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Animalario Libre de Patógenos Arrixaca-IMIB, Murcia, Spain
| | - A I López-Navas
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Department of Psychology, Catholic University of Murcia, Murcia, Spain
| | - A M Hernández
- Endocrinology and Nutrition Service, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - A Muñoz
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - P Ramírez
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain
| | - P Parrilla
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
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Martínez-Alarcón L, Ríos A, Ramis G, Gómez-Laguna J, Moll X, Falceto V, San Román-Acaso F, San Román-Llorens F, Quereda JJ, Herrero-Medrano JM, Mendonça L, Martin-Barrasa JL, Fernández OM, Hernández AM, Muñoz A, Ramírez P, Parrilla P. Veterinary Students' Attitude Toward Living Kidney Donation: A Multicenter Stratified Study From Spain. Transplant Proc 2018; 50:2280-2283. [PMID: 30316341 DOI: 10.1016/j.transproceed.2018.02.177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/26/2018] [Indexed: 02/07/2023]
Abstract
Living kidney related donations (LKRD) should be promoted because of the current deficit of organs for transplantation. The objective of the study was to analyze the attitude of Spanish veterinary students toward LKRD, because they may influence public opinion in the future, and to determine the factors that condition it. METHODS A sociological, interdisciplinary, multicenter, and observational study was carried out in the veterinary students enrolled in Spain (n = 9000) in the university academic year 2010-2011. A sample of 2815 students was stratified by geographical area and academic year. The students' attitude toward LKRD was assessed using a psychosocial validated questionnaire (PCID-DVR Rios), was self-administered, and was completed anonymously. Veterinary schools were randomly selected. The questionnaire was applied to each academic year at compulsory sessions. Statistical analysis was preformed using t test, χ2 test, and logistic regression analysis. RESULTS The completion rate was 95% (n = 2683); 93% (n = 2504) were in favor of LKRD and 36% (n = 945) supported unrelated living kidney donation. The following variables were associated with having a more favorable attitude: (1) sex (P < .001), (2) being a student of southern universities (P = .03), (3) attitude toward deceased donation (P < .001), (4) having a father (P < .001) or a mother (P < .001) in favor of organ donation, and (5) having discussed the subject with friends (P = .03) or family (P = .02). However, only 60% would accept a kidney from a relative. CONCLUSION Spanish veterinary students have a favorable attitude toward LKRD. However, only 60% would accept a kidney from a relative.
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Affiliation(s)
- L Martínez-Alarcón
- International Collaborative Donor Project, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - A Ríos
- International Collaborative Donor Project, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain.
| | - G Ramis
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - J Gómez-Laguna
- Departament of Anatomy and Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - X Moll
- Departamento de Medicina y Cirugía Animal, Facultad Veterinaria, Universitat Autonoma Barcelona (UAB), Barcelona, Spain
| | - V Falceto
- Universidad Zaragoza, Zaragoza, Spain
| | | | | | - J J Quereda
- Grupo Fisiopatología de la Reproducción, Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities Valencia, Valencia, Spain
| | - J M Herrero-Medrano
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - L Mendonça
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiania, Brazil
| | - J L Martin-Barrasa
- Experimental Animal Facility, Research Unit, Hospital Universitario de Gran Canaria, Dr. Negrín, Las Palmas de Gran Canaria, Spain; Animal Infectious Diseases and Ictiopatology, University Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Spain
| | - O M Fernández
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Animalario libre de Patógenos Arrixaca-IMIB, Murcia, Spain
| | - A M Hernández
- Endocrinology and Nutrition Service, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - A Muñoz
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - P Ramírez
- International Collaborative Donor Project, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - P Parrilla
- International Collaborative Donor Project, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
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Martínez-Alarcón L, Ríos A, Ramis G, Gómez-Laguna J, Moll X, Falceto V, San Román-Acaso F, San Román-Llorens F, José Quereda J, Herrero-Medrano JM, Mendonça L, Martin-Barrasa JL, Fernández OM, López-Navas AI, Hernández AM, Muñoz A, Ramírez P, Parrilla P. Multicenter Stratified Study From Spain About Acceptance of Living Liver Donation Among Veterinarian Students. Transplant Proc 2018; 50:2272-2275. [PMID: 30316339 DOI: 10.1016/j.transproceed.2018.02.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/26/2018] [Indexed: 02/07/2023]
Abstract
Veterinarians often hold decision-making positions in the public health care system, and therefore can influence public opinion about organ donation. The objective is to analyze the attitude of Spanish veterinarian students toward living liver donation (LLD) and to establish which factors have an influence on this attitude. METHODS A sociological, interdisciplinary, multicenter, and observational study was carried out in the veterinarian students enrolled in Spain (n = 9000) (university academic year 2010-2011). A sample of 2854 students was stratified by geographic area and academic year. A validated questionnaire (PCID-DVH RIOS) was self-administered and completed anonymously. The questionnaire was applied to each academic year at compulsory sessions at randomly selected veterinary schools. Statistical analysis included t test, χ2 test, and logistic regression analysis. RESULTS Completion rate was 94% (n = 2683); 89% (n = 2345) were in favor of related LLD, and 40% (n = 1053) supported unrelated LLD. The following variables were associated with a more favorable attitude: (1) age (P < .001), (2) sex (P < .001), (3) academic year (P < .001), (4) believing in the possibility of needing a transplant oneself in the future (P < .001), (5) attitude toward deceased donation (P < .001), (6) attitude toward living kidney donation (P < .001), (7) acceptance of a donated liver segment from a family member if one were needed (P < .001), (8) having discussed the subject with one's family (P = .009) and friends (P < .001), (9) a partner's opinion about the subject (P = .002), and (10) fear of the possible mutilation of the body after donation (P < .001). CONCLUSION Spanish veterinary students have a favorable attitude toward LLD.
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Affiliation(s)
- L Martínez-Alarcón
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain
| | - A Ríos
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain.
| | - G Ramis
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain; Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - J Gómez-Laguna
- Department of Anatomy and Comparative Pathology, University of Córdoba, Córdoba, Spain
| | - X Moll
- Departamento de Medicina y Cirugía Animal, Facultad Veterinaria, Universitat Autonoma Barcelona (UAB), Barcelona, Spain
| | - V Falceto
- Universidad Zaragoza, Zaragoza, Spain
| | | | | | - J José Quereda
- Grupo Fisiopatología de la Reproducción, Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities Valencia, Valencia, Spain
| | - J M Herrero-Medrano
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - L Mendonça
- Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Goiania, Brazil
| | - J L Martin-Barrasa
- Experimental Animal Facility, Research Unit, Hospital Universitario de Gran Canaria, Dr. Negrín, Las Palmas de Gran Canaria, Arucas, Spain; Animal Infectious Diseases and Ictiopatology, University Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Spain
| | - O M Fernández
- Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; Animalario libre de Patógenos Arrixaca-IMIB, Murcia, Spain
| | - A I López-Navas
- International Collaborative Donor Project, Murcia, Spain; Department of Psychology, Catholic University of Murcia, Murcia, Spain
| | - A M Hernández
- Endocrinology and Nutrition Service, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - A Muñoz
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
| | - P Ramírez
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain; International Collaborative Donor Project, Murcia, Spain
| | - P Parrilla
- Servicio de Cirugía, Unidad de Trasplantes, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
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Herrero-Medrano JM, Mathur PK, ten Napel J, Rashidi H, Alexandri P, Knol EF, Mulder HA. Estimation of genetic parameters and breeding values across challenged environments to select for robust pigs. J Anim Sci 2016; 93:1494-502. [PMID: 26020171 DOI: 10.2527/jas.2014-8583] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Robustness is an important issue in the pig production industry. Since pigs from international breeding organizations have to withstand a variety of environmental challenges, selection of pigs with the inherent ability to sustain their productivity in diverse environments may be an economically feasible approach in the livestock industry. The objective of this study was to estimate genetic parameters and breeding values across different levels of environmental challenge load. The challenge load (CL) was estimated as the reduction in reproductive performance during different weeks of a year using 925,711 farrowing records from farms distributed worldwide. A wide range of levels of challenge, from favorable to unfavorable environments, was observed among farms with high CL values being associated with confirmed situations of unfavorable environment. Genetic parameters and breeding values were estimated in high- and low-challenge environments using a bivariate analysis, as well as across increasing levels of challenge with a random regression model using Legendre polynomials. Although heritability estimates of number of pigs born alive were slightly higher in environments with extreme CL than in those with intermediate levels of CL, the heritabilities of number of piglet losses increased progressively as CL increased. Genetic correlations among environments with different levels of CL suggest that selection in environments with extremes of low or high CL would result in low response to selection. Therefore, selection programs of breeding organizations that are commonly conducted under favorable environments could have low response to selection in commercial farms that have unfavorable environmental conditions. Sows that had experienced high levels of challenge at least once during their productive life were ranked according to their EBV. The selection of pigs using EBV ignoring environmental challenges or on the basis of records from only favorable environments resulted in a sharp decline in productivity as the level of challenge increased. In contrast, selection using the random regression approach resulted in limited change in productivity with increasing levels of challenge. Hence, we demonstrate that the use of a quantitative measure of environmental CL and a random regression approach can be comprehensively combined for genetic selection of pigs with enhanced ability to maintain high productivity in harsh environments.
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Abellaneda JM, Martínez-Alarcón L, Quereda JJ, Herrero-Medrano JM, Mendonça L, Mrowiec A, García-Nicolás O, Pallarés FJ, Ríos A, Muñoz A, Ramírez P, Ramis G. Validation of a quantitative polymerase chain reaction method for human Alu gene detection in microchimeric pigs used as donors for xenotransplantation. Transplant Proc 2015; 47:132-5. [PMID: 25645791 DOI: 10.1016/j.transproceed.2014.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
This work was undertaken to evaluate whether a real-time quantitative polymerase chain reaction (qPCR) is as an adequate method for detection and quantification of human-specific DNA elements (Alu gene) in tissues and blood samples of pigs in which human stem cells were engrafted. Real-time qPCR quantification was performed with the use of previously described primers. The human DNA was mixed with different quantities of porcine DNA. The primer concentration and specificity, the qPCR efficiency, the quantification variations due to different porcine DNA concentrations, and the dissociation curve produced by the assay were evaluated. The qPCR proved to be specific, robust, with a reproducible and specific bimodal melting curve. High porcine DNA concentration produced subquantification, especially with low human DNA quantity. However, the assay proved to be useful for the detection of chimeric piglets produced by human cells injected in utero, because the effect caused by the porcine DNA interference was corrected in quantification of human DNA from piglets.
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Affiliation(s)
- J M Abellaneda
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain
| | - L Martínez-Alarcón
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain; Departamento de Cirugía, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - J J Quereda
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain
| | - J M Herrero-Medrano
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain
| | - L Mendonça
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain; Escola de Veterinaria, Universidad de Federal de Goiás, Goiás, Brazil
| | - A Mrowiec
- Departamento de Inmunología. Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - O García-Nicolás
- Departamento de Anatomía y Anatomía Patológica Comparadas, Universidad de Murcia, Murcia, Spain
| | - F J Pallarés
- Departamento de Anatomía y Anatomía Patológica Comparadas, Universidad de Murcia, Murcia, Spain
| | - A Ríos
- Departamento de Cirugía, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - A Muñoz
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain; Departamento de Producción Animal, Universidad de Murcia, Murcia, Spain
| | - P Ramírez
- Departamento de Cirugía, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - G Ramis
- Grupo de Investigación Cría y Salud Animal, Universidad de Murcia, Murcia, Spain; Departamento de Producción Animal, Universidad de Murcia, Murcia, Spain.
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Mathur PK, Herrero-Medrano JM, Alexandri P, Knol EF, Napel JT, Rashidi H, Mulder HA. Estimating challenge load due to disease outbreaks and other challenges using reproduction records of sows1. J Anim Sci 2014; 92:5374-81. [DOI: 10.2527/jas.2014-8059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- P. K. Mathur
- TOPIGS Research Center IPG, PO Box 43, 6640 AA Beuningen, The Netherlands
| | | | - P. Alexandri
- TOPIGS Research Center IPG, PO Box 43, 6640 AA Beuningen, The Netherlands
| | - E. F. Knol
- TOPIGS Research Center IPG, PO Box 43, 6640 AA Beuningen, The Netherlands
| | - J. ten Napel
- Animal Breeding and Genomics Centre, Wageningen UR Livestock Research, PO Box 65, 8200 AB Lelystad, the Netherlands
| | - H. Rashidi
- Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
| | - H. A. Mulder
- Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
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Ramis G, Martínez-Alarcón L, Quereda JJ, Mendonça L, Majado MJ, Gomez-Coelho K, Mrowiec A, Herrero-Medrano JM, Abellaneda JM, Pallares FJ, Ríos A, Ramírez P, Muñoz A. Optimization of cytotoxicity assay by real-time, impedance-based cell analysis. Biomed Microdevices 2014; 15:985-95. [PMID: 23887614 DOI: 10.1007/s10544-013-9790-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This paper presents an optimized procedure for assessing an immune-mediated cytotoxicity, produced after the addition of human and baboon serum to transgenic porcine fibroblasts. This procedure is performed with the xCELLigence Real-Time Cell Analyzer (RTCA). The xCELLigence system measures the impedance variations in the culture media of a 96-well microelectronic plate, and shows the changes in cell number and morphology in a real-time plot. However, different factors need to be optimized before developing an RTCA assay. Thus, we studied the influence of several variables, such as the number of cells seeded, the time the cells were allowed to grow before the tests, the serum concentration and the addition of rabbit complement. The findings were confirmed by the WST-1 classical cytotoxicity test. The results showed that 7.5 × 10(3) cells seeded per well produced the adequate CI in 10 h. The area under the curve and the CImin versus concentration values showed a very high correlation index (r(2) = 0.966 and r(2) = 0.92 for the first 50 h after challenge, respectively), proving that CI variations are directly proportional to the quantity of serum added. The addition of complement resulted in lower CImin values. Therefore, both the cytolysis level with and without exogenous complement addition had to be assessed. There was a high correlation between the relative cytotoxicity assessed by WST-1 and the CI obtained by RTCA when exogenous complement was not added (r(2) = 0.827; p < 0.001). The correlation was average when rabbit complement was added (r(2) = 0.523; p = 0.046). In conclusion, culture conditions have an important influence on RTCA cytotoxicity assays.
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Affiliation(s)
- G Ramis
- Departamento de Producción Animal. Facultad de Veterinaria, Universidad de Murcia, Campus de Excelencia Mare Nostrum, Murcia, 3738, Spain,
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Ramis G, Martínez-Alarcón L, Majado MJ, Quereda JJ, Mendonça L, Herrero-Medrano JM, Abellaneda JM, Ríos A, López-Navas A, Ramírez P, Muñoz A. Assessment of in vitro heparin complement regulation capacity during real-time cell analyzer antibody-mediated cytolysis assay: compatibility studies for pig-to-baboon xenotransplantation. Transplant Proc 2013; 44:1584-8. [PMID: 22841220 DOI: 10.1016/j.transproceed.2012.05.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
OBJECTIVE To assess the effect of sodium heparin concentrations on antibody- and complement-mediated cytolysis by means of a real-time cell analyzer system (RTCA) investigating the complement regulation ability of heparin to reduce or prevent hyperacute in an in vitro model of pig-to-baboon xenotransplantation. MATERIALS AND METHODS Fibroblasts isolated from the skin of two transgenic pigs were cultured in microelectronic 96-well plates for 9 hours. Then, we added 20 μL of normal sera from two healthy adult olive baboons (Papio anubis) or two volunteer healthy humans. Simultaneous cultures had added heparin at 3.5, 5, 7.5, 15, and 30 IU. Moreover, rabbit complement was added for the exogenous complement group (ExC) versus the other group only with the complement present in the sera as an endogenous complement group (EnC). Cellular cultures were monitored over 150 hours after challenge. With cellular index (CI) data recorded by the xCELLigence software system, we calculate area under the curve versus concentration (AUC) and minimum CI (CImin) versus concentration. RESULTS All cultures showed decreased CI after challenge with human or baboon sera. There was a high correlation for AUC (r(2) > 0.90) and CImin versus concentration (r(2) > 0.970) during the first 40 hours postchallenge among the EnC group, regardless of human or baboon sera. However, there was no correlation for AUC and CImin for the ExC group. There was a reduction of CImin related to increased heparin concentrations. CONCLUSIONS The addition of heparin did not reduce antibody- and complement-mediated cytolysis assessed in vitro by RTCA in pig-to-baboon compatibility assays.
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Affiliation(s)
- G Ramis
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain.
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Abellaneda JM, Ramis G, Martínez-Alarcón L, Majado MJ, Quereda JJ, Herrero-Medrano JM, Mendonça L, García-Nicolás O, Reus M, Insausti C, Ríos A, López-Navas A, González MR, Pallarés FJ, Munoz A, Ramírez P, Parrilla P. Generation of human-to-pig chimerism to induce tolerance through transcutaneous in utero injection of cord blood-derived mononuclear cells or human bone marrow mesenchymals cells in a preclinical program of liver xenotransplantation: preliminary results. Transplant Proc 2013; 44:1574-8. [PMID: 22841218 DOI: 10.1016/j.transproceed.2012.05.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Using a percutaneous ecoguided injection system to obtain chimeric piglets through a less invasive and traumatic technique than previously reported. MATERIALS AND METHODS The two types of human cells included umbilical cord blood mononuclear elements and mesenchymal stem cells cultured from bone marrow. Four sows at gestational day 50 were anesthetized. A needle was inserted through the skin and uterine wall to reach the peritoneal cavity of the fetuses under continuous ultrasound guidance. Fourteen piglets were injected with various cell concentrations. RESULTS All sows carried pregnancies to term yielding 69 piglets, among which 67 were alive and two mummified. Two piglets died during the first 48 hours of life. Chimerism was detected using flow cytometry and by quantitative polymerase chain reaction (q-PCR) to detect Alu gene in blood or tissues samples. The analysis detected blood chimerism in 13 piglets (21%) by flow cytometry and the presence of the human Alu gene in 33 (51%) by q-PCR. The results suggest cell trafficking between littermates after in utero injection. CONCLUSIONS Transcutaneous echo-guided injection succeeded to produce chimeric piglets without disadvantages to the sow or the fetuses and avoiding abortions or fetal death.
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Affiliation(s)
- J M Abellaneda
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain
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Herrero-Medrano JM, Megens HJ, Crooijmans RP, Abellaneda JM, Ramis G. Farm-by-farm analysis of microsatellite, mtDNA and SNP genotype data reveals inbreeding and crossbreeding as threats to the survival of a native Spanish pig breed. Anim Genet 2012; 44:259-66. [DOI: 10.1111/age.12001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2012] [Indexed: 11/30/2022]
Affiliation(s)
| | - H. J. Megens
- Animal Breeding and Genomics Centre; Wageningen University; De Elst 1 6708 WD. Wageningen; The Netherlands
| | - R. P. Crooijmans
- Animal Breeding and Genomics Centre; Wageningen University; De Elst 1 6708 WD. Wageningen; The Netherlands
| | - J. M. Abellaneda
- Departamento de Producción Animal; Fac. de Veterinaria; Universidad de Murcia; área de Genética. C.P. 30100, Murcia; Spain
| | - G. Ramis
- Departamento de Producción Animal; Fac. de Veterinaria; Universidad de Murcia; área de Genética. C.P. 30100, Murcia; Spain
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Goedbloed DJ, Megens HJ, Van Hooft P, Herrero-Medrano JM, Lutz W, Alexandri P, Crooijmans RPMA, Groenen M, Van Wieren SE, Ydenberg RC, Prins HHT. Genome-wide single nucleotide polymorphism analysis reveals recent genetic introgression from domestic pigs into Northwest European wild boar populations. Mol Ecol 2012; 22:856-66. [PMID: 22731769 DOI: 10.1111/j.1365-294x.2012.05670.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Present-day genetic introgression from domestic pigs into European wild boar has been suggested in various studies. However, no hybrids have been identified beyond doubt mainly because available methods were unable to quantify the extent of introgression and rule out natural processes. Genetic introgression from domestic pigs may have far-reaching ecological consequences by altering traits like the reproduction rate or immunology of wild boar. In this study, we demonstrate a novel approach to investigate genetic introgression in a Northwest (NW) European wild boar data set using a genome-wide single nucleotide polymorphism (SNP) assay developed for domestic pigs. We quantified the extent of introgression using allele frequency spectrum analysis, in silico hybridization simulations and genome distribution patterns of introgressed SNPs. Levels of recent introgression in the study area were expected to be low, as pig farming practices are prevailingly intensive and indoors. However, evidence was found for geographically widespread presence of domestic pig SNPs in 10% of analysed wild boar. This was supported by the identification of two different pig mitochondrial DNA haplotypes in three of the identified hybrid wild boar, suggesting that introgression had occurred from multiple sources (pig breeds). In silico hybridization simulations showed that the level of introgression in the identified hybrid wild boar is equivalent to first-generation hybrids until fifth-generation backcrosses with wild boar. The distribution pattern of introgressed SNPs supported these assignments in four of nine hybrids. The other five hybrids are considered advanced-generation hybrids, resulting from interbreeding among hybrid individuals. Three of nine hybrids were genetically associated with a different wild boar population than the one in which they were sampled. This discrepancy suggests that genetic introgression has occurred through the escape or release of an already hybridized farmed wild boar stock. We conclude that genetic introgression from domestic pigs into NW European wild boar populations is more recent and more common than expected and that genome-wide SNP analysis is a promising tool to quantify recent hybridization in free-living populations.
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Affiliation(s)
- D J Goedbloed
- Resource Ecology Group, Wageningen UR, Wageningen, The Netherlands.
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12
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Quereda JJ, Herrero-Medrano JM, Abellaneda JM, García-Nicolás O, Martínez-Alarcón L, Pallarés FJ, Ramírez P, Muñoz A, Ramis G. Porcine endogenous retrovirus copy number in different pig breeds is not related to genetic diversity. Zoonoses Public Health 2012; 59:401-7. [PMID: 22348392 DOI: 10.1111/j.1863-2378.2012.01467.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The risk of zoonoses is a major obstacle to xenotransplantation. Porcine endogenous retrovirus (PERV) poses a potential risk of zoonotic infection, and its control is a prerequisite for the development of clinical xenotransplantation. The copy number of PERV varies among different breeds, and it has been suggested that the PERV integrations number is increased by inbreeding. The purpose of this study was (i) to examine the copy number of PERV in different Spanish pig breeds, Spanish wild boar and commercial cross-bred pigs from five different farms and genetic background (CCP1-CCP5) and (ii) to investigate the correlation between PERV copy number and the genetic background of the pigs in order to improve the selection of pigs for xenotransplantation. PERV copy number was determined by quantitative, real-time polymerase chain reactions. Thirty-four microsatellite markers were genotyped to describe the genetic diversity within populations (observed and expected heterozygosities, Ho and He, respectively) and the inbreeding coefficient (F). Pearson's correlation coefficient was used to determine the relationship between PERV copy number and Ho, He and F. The copy number of PERV among different pig breeds was estimated to range between three (CCP1) and 43 copies (Iberian Pig). Statistical differences were found among the studied populations concerning PERV copy number. No correlation was found between the PERV copy number and the heterozygosity (calculated at an individual level or at a population level) or the inbreeding coefficient of each population. Our data suggest that pigs inbreeding does not increase PERV copy number and support the idea that careful selection of pigs for organ donation with reduced PERV copy number will minimize the risk of retrovirus transmission to the human receptor.
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Affiliation(s)
- J J Quereda
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Murcia, Spain.
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Quereda JJ, Martínez-Alarcón L, Mendoça L, Majado MJ, Herrero-Medrano JM, Pallarés FJ, Ríos A, Ramírez P, Muñoz A, Ramis G. Validation of xCELLigence real-time cell analyzer to assess compatibility in xenotransplantation with pig-to-baboon model. Transplant Proc 2011; 42:3239-43. [PMID: 20970663 DOI: 10.1016/j.transproceed.2010.05.059] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To validate the use of a microelectronic real-time cell analyzer system (RTCA) we developed a complement-mediated antibody cytotoxicity assay to investigate the compatibility of a graft and a recipient in pig-to-baboon xenotransplantation. MATERIALS AND METHODS Fibroblasts isolated from the skin of five hCD55, hCD59, and hCD46 transgenic pigs (TP) were cultured in 96 microelectronic well plates for 17 hours. Then, we added to each microwell 20 μL of normal sera from nine healthy adult olive baboons (Papio anubis)-three males and six females. The evolution of the cell culture was assessed every 3 minutes during the pretreatment period, at 11 hours postaddition, and every 30 minutes from 12 to 96 hours. Simultaneously, we performed a 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Fibroblasts from wild-type (WT) pigs were used as positive controls and microwells without serum addition from each TP as negative controls. The RTCA results were expressed as a normalized cellular index (NCI). RESULTS Differences were observed between the five TP fibroblasts and the WT fibroblasts, with greater cytotoxicity on WT cells. Among TP, a higher cytolytic level was observed in males than females. The MTT results correlated with NCI at different times, with the minimum NCI and with the time to for NCI recovery before serum addition. The correlation was lower than that previously reported in environmental toxicity assays. CONCLUSIONS RTCA allows a long-term assessment of the immunocytotoxic effect of baboon sera on pig cells, providing a suitable tool to perform compatibility tests for xenotransplantation.
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Affiliation(s)
- J J Quereda
- Departamento de Producción Animal, Facultad de Veterinaria, Universidad de Murcia, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain
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