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Flow cytometry analysis of CD11c-positive peripheral blood mononuclear cells in horses. Vet Immunol Immunopathol 2022; 253:110504. [DOI: 10.1016/j.vetimm.2022.110504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/03/2022] [Accepted: 10/16/2022] [Indexed: 11/23/2022]
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A comprehensive analysis of e-CAS cell line reveals they are mouse macrophages. Sci Rep 2018; 8:8237. [PMID: 29844485 PMCID: PMC5974405 DOI: 10.1038/s41598-018-26512-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 05/09/2018] [Indexed: 12/15/2022] Open
Abstract
The 3Rs principles (Replacement, Reduction and Refinement) are focused on finding alternatives to the use of animals in research. In this regard, cell lines are popular and useful tools for the replacement of primary cells in in vitro studies. However, around 15–30% of cell lines used in research have been misidentified or cross-contaminated generating concerns about the results obtained from experiments that use them. Here we described how old aliquots of an equine macrophage cell line (e-CAS) stored at the Animal Health Trust did not contain equine cells but macrophages of murine origin (m-CAS).
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Espino-Solis GP, Quintero-Hernandez V, Olvera-Rodriguez A, Calderon-Amador J, Pedraza-Escalona M, Licea-Navarro A, Flores-Romo L, Possani LD. Novel monoclonal antibody against alphaX subunit from horse CD11c/CD18 integrin. Vet Immunol Immunopathol 2015; 164:220-6. [PMID: 25727181 DOI: 10.1016/j.vetimm.2015.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 01/09/2015] [Accepted: 02/05/2015] [Indexed: 11/25/2022]
Abstract
The αX I-domain of the horse integrin CD11c was successfully expressed in Escherichia coli, purified, biochemically characterized and used as immunogen to generate murine monoclonal antibodies against horse CD11c, which are not yet commercially available. One monoclonal antibody mAb-1C4 against the αX I-domain, is an IgG2a able to interact with the recombinant I-domain, showing an EC50=2.4ng according to ELISA assays. By western blot with horse PBMCs lysates the mAb-1C4 recognized a protein of 150kDa which corresponds well with the CD11c molecule. Using immunohistochemistry in horse lymph node tissue sections, mAb-1C4 marked cells in situ, some with apparent dendritic morphology. Thus the mAb generated to a recombinant epitope from horse CD11c identified the molecule in intact cells within horse lymphoid tissue. By the labelling intensity, the histological location (paracortical and interfollicular areas) and the apparent morphology of the marked cells, we can say that these are putative horse dendritic cells (DCs). The development of a mAb to horse CD11c provides a new tool to better study the horse DC biology and opens other biotechnological avenues, such as DC targeting-based vaccines.
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Affiliation(s)
- Gerardo Pavel Espino-Solis
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnologia - Universidad Nacional Autonoma de Mexico, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, Cuernavaca, Morelos, Mexico.
| | - Veronica Quintero-Hernandez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnologia - Universidad Nacional Autonoma de Mexico, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, Cuernavaca, Morelos, Mexico
| | - Alejandro Olvera-Rodriguez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnologia - Universidad Nacional Autonoma de Mexico, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, Cuernavaca, Morelos, Mexico
| | - Juana Calderon-Amador
- Departamento de Biologia Celular CINVESTAV-IPN, Av IPN 2508, San Pedro Zacatenco, Mexico, D.F., Mexico
| | - Martha Pedraza-Escalona
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnologia - Universidad Nacional Autonoma de Mexico, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, Cuernavaca, Morelos, Mexico
| | - Alexei Licea-Navarro
- Departamento de Biotecnologia Marina, C.I.C.E.S.E. Carretera Ensenada-Tijuana # 3918, Zona Playitas, Ensenada, B.C., Mexico
| | - Leopoldo Flores-Romo
- Departamento de Biologia Celular CINVESTAV-IPN, Av IPN 2508, San Pedro Zacatenco, Mexico, D.F., Mexico
| | - Lourival Domingos Possani
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnologia - Universidad Nacional Autonoma de Mexico, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, Cuernavaca, Morelos, Mexico.
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Immunoprecipitation of equine CD molecules using anti-human MABs previously analyzed by flow cytometry and immunohistochemistry. Vet Immunol Immunopathol 2012; 145:7-13. [DOI: 10.1016/j.vetimm.2011.07.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Revised: 07/20/2011] [Accepted: 07/27/2011] [Indexed: 11/19/2022]
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Ibrahim S, Steinbach F. Non-HLDA8 animal homologue section anti-leukocyte mAbs tested for reactivity with equine leukocytes. Vet Immunol Immunopathol 2007; 119:81-91. [PMID: 17692930 DOI: 10.1016/j.vetimm.2007.06.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In addition to the 379 monoclonal antibodies (mAbs) tested in the animal homologues section of HLDA8, another 155 mAbs were screened at the Institute for Zoo and Wildlife Research, Berlin for cross-reactivity with equine leukocytes. For this purpose, one colour flow-cytometric analysis was performed as screening test. This additional screening indicated further 16 mAbs as positive with staining homologous to human pattern, 1 mAb with weak (positive) reactivity, 11 mAbs with positive, but likely not valuable staining, 12 mAbs with alternate expression pattern from that expected from human immunology, 2 mAbs with questionable variable staining, 13 mAbs with weak-positive expression and alternate pattern, and 78 negative mAbs. In 23 cases, more appropriate target cells, such as thymocytes or stem cells, were not available for screening. The results support and add to the value of the "cross-reactivity" approach for equine immunology.
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Affiliation(s)
- Sherif Ibrahim
- Institute for Zoo and Wildlife Research, Alfred Kowalke Str. 17, 10315 Berlin, Germany
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Ibrahim S, Saunders K, Kydd JH, Lunn DP, Steinbach F. Screening of anti-human leukocyte monoclonal antibodies for reactivity with equine leukocytes. Vet Immunol Immunopathol 2007; 119:63-80. [PMID: 17707518 DOI: 10.1016/j.vetimm.2007.06.034] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three hundred and seventy-nine monoclonal antibodies (mAbs) against various human CD molecules supplied to the HLDA8 animal homologues section (including four isotype controls) were analysed for cross-reactivity with equine leukocytes. First, flow cytometric identification of positively reacting mAbs was performed in one laboratory. Thereafter, a second round of flow cytometric evaluation was performed, involving three laboratories participating in the study. The first test-round indicated 17 mAbs as potentially positive. After the second round of flow cytometric analysis, 14 mAbs remained (directed against CD2, CD11a, CD18, CD44, CD45, CD49d, CD91, CD163 and CD172) where cross-reactivity was anticipated based on similarities between the human and equine staining pattern. Additionally, there was 1 mAb with weak likely positive reactivity, 12 mAbs with positive staining, which likely do not reflect valuable data, 5 mAbs with clear alternate expression pattern from that expected from humans, 5 mAbs with a questionable staining pattern itself, i.e. that was variable between the three labs, 32 mAbs with weak-positive expression and alternate staining pattern, and 279 negative mAbs (including the four isotype controls) were detected. In 31 cases, more appropriate target cells, such as thymocytes or stem cells, were not available for the screening. The results underline the value of this "cross-reactivity" approach for equine immunology. However, as only a few mAbs against leukocyte surface antigens reacted positively (approximately 4% of the mAbs submitted), the analysis of further anti-human mAbs and directed efforts to develop species-specific anti-CD mAb are still required.
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Affiliation(s)
- Sherif Ibrahim
- Institute for Zoo and Wildlife Research, Alfred Kowalke Street 17, 10315 Berlin, Germany
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