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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">Cell cultures provide a good model for studying lung diseases but they are difficult to reproduce and the number of cells obtained is limited&#46; The aim of this study was to develop a way to increase the production of human bronchial epithelial cells &#40;BEC&#41; in primary cultures&#46;</p> <span class="elsevierStyleSectionTitle">Materialand methods</span><p class="elsevierStyleSimplePara elsevierViewall">A total of 12 samples &#40;9 from surgical specimens and 3 from endoscopic biopsies&#41; were processed on plates coated with type I collagen with growth medium supplemented for BEC&#46; When cell proliferation started&#44; the explants were removed for successive subculturing&#46; The remaining cells were left to proliferate and were trypsinized after 50&#37; confluence&#46; We recorded the number of cells obtained&#44; cell viability&#44; and the percentage positive for cytokeratin 7&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">The total number of cells obtained by this method was 3-fold the number of human BEC obtained with simple primary cultures&#46; The maximum number of subcultures was 5&#44; mean &#40;SD&#41; cell viability was 91&#46;9&#37; &#40;11&#46;7&#37;&#41;&#44; and the percentage of cells positive for cytokeratin 7 was 30&#46;71&#37; &#40;10&#46;68&#37;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">The described method for expanding primary BEC cultures increases cell production&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">LOS cultivos celulares son un buen modelo para el estudio de las enfermedades pulmonares&#44; pero son dif&#237;ciles de reproducir y producen un n&#250;mero limitado de c&#233;lulas&#46; El objetivo de este estudio ha sido desarrollar un m&#233;todo que incrementase la producci&#243;n de c&#233;lulas epiteliales bronquiales &#40;CEB&#41; humanas en cultivos primarios&#46;</p> <span class="elsevierStyleSectionTitle">Materialy m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se proces&#243; un total de 12 muestras &#40;9 procedentes de muestras quir&#250;rgicas y 3 de biopsias endosc&#243;picas&#41; en placas recubiertas de col&#225;geno tipo I con medio suplementado para CEB&#46; Al iniciarse la proliferaci&#243;n celular a su alrededor&#44; los explantes se extrajeron y subcultivaron sucesivamente&#46; Las c&#233;lulas restantes se dejaron proliferar y se tripsinizaron tras alcanzar m&#225;s del 50&#37; de confluencia&#46; Se valoraron el n&#250;mero de c&#233;lulas obtenidas&#44; la viabilidad y la citoqueratina 7&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">El n&#250;mero total de c&#233;lulas obtenidas con este m&#233;todo super&#243; en una media de 3 veces el n&#250;mero de CEB humanas obtenidas en cultivos primarios simples&#46; El n&#250;mero m&#225;ximo de subcultivos fue de 5&#44; la viabilidad media &#40;&#177; desviaci&#243;n est&#225;ndar&#41; fue de 91&#44;9 &#177; 11&#44;7&#37; y el porcentaje de c&#233;lulas positivas para la citoqueratina 7 del 30&#44;71 &#177; 10&#44;68&#37;&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">El m&#233;todo descrito para amplificar cultivos primarios de CEB permite incrementar la producci&#243;n de c&#233;lulas obtenidas&#46;</p>"
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Journal Information
Vol. 41. Issue 9.
Pages 524-527 (September 2005)
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Vol. 41. Issue 9.
Pages 524-527 (September 2005)
Techniques and Procedures
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Expansion of Primary Bronchial Epithelial Cell Cultures
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G. Margarit
Corresponding author
gmargarit@hsp.santpau.es

Correspondence: Dra. G. Margarit. Antoni M. Claret, 167. 08025 Barcelona. España
, J. Belda, P. Casan, J. Sanchis
Departamento de Neumología, Hospital de la Santa Creu i de Sant Pau, Facultat de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
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Objective

Cell cultures provide a good model for studying lung diseases but they are difficult to reproduce and the number of cells obtained is limited. The aim of this study was to develop a way to increase the production of human bronchial epithelial cells (BEC) in primary cultures.

Materialand methods

A total of 12 samples (9 from surgical specimens and 3 from endoscopic biopsies) were processed on plates coated with type I collagen with growth medium supplemented for BEC. When cell proliferation started, the explants were removed for successive subculturing. The remaining cells were left to proliferate and were trypsinized after 50% confluence. We recorded the number of cells obtained, cell viability, and the percentage positive for cytokeratin 7.

Results

The total number of cells obtained by this method was 3-fold the number of human BEC obtained with simple primary cultures. The maximum number of subcultures was 5, mean (SD) cell viability was 91.9% (11.7%), and the percentage of cells positive for cytokeratin 7 was 30.71% (10.68%).

Conclusions

The described method for expanding primary BEC cultures increases cell production.

Key Words:
Primary cultures
Bronchial epithelial cells
Culture expansion
Explants
Cytokeratin 7
Objetivo

LOS cultivos celulares son un buen modelo para el estudio de las enfermedades pulmonares, pero son difíciles de reproducir y producen un número limitado de células. El objetivo de este estudio ha sido desarrollar un método que incrementase la producción de células epiteliales bronquiales (CEB) humanas en cultivos primarios.

Materialy métodos

Se procesó un total de 12 muestras (9 procedentes de muestras quirúrgicas y 3 de biopsias endoscópicas) en placas recubiertas de colágeno tipo I con medio suplementado para CEB. Al iniciarse la proliferación celular a su alrededor, los explantes se extrajeron y subcultivaron sucesivamente. Las células restantes se dejaron proliferar y se tripsinizaron tras alcanzar más del 50% de confluencia. Se valoraron el número de células obtenidas, la viabilidad y la citoqueratina 7.

Resultados

El número total de células obtenidas con este método superó en una media de 3 veces el número de CEB humanas obtenidas en cultivos primarios simples. El número máximo de subcultivos fue de 5, la viabilidad media (± desviación estándar) fue de 91,9 ± 11,7% y el porcentaje de células positivas para la citoqueratina 7 del 30,71 ± 10,68%.

Conclusiones

El método descrito para amplificar cultivos primarios de CEB permite incrementar la producción de células obtenidas.

Palabras clave:
Cultivos primarios
Células epiteliales bronquiales
Amplificación
Explantes
Citoqueratina 7
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This study was partially funded by Red-Respira-ISCIII-RTIC-03/11.

Copyright © 2005. Sociedad Española de Neumología y Cirugía Torácica (SEPAR)
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