Summary

Un simple Blood Red lisis celular Método para el establecimiento de líneas de células B linfoblastoides

Published: January 14, 2017
doi:

Summary

Un método de lisis de glóbulos rojos simple para el establecimiento de B-LCLs se desarrolló con una alta eficiencia de la inmortalización, lo que requiere una pequeña cantidad de sangre y el ahorro de tiempo desde el inicio de la crioconservación.

Abstract

A number of methods exist for the transformation of B lymphocytes by the Epstein Barr virus in vitro into immortalized cell lines. We have developed a new method with a powerful and simple strategy for the establishment of B-LCLs, the red blood cell lysis method. This method simplified the PBMC separation procedure with red blood cell removal, and used as little as 0.5 mL of whole blood for establishing EBV-immortalized cell lines, which can proliferate to large cell numbers in a relatively short amount time with a 100% success rate. The method is simple, reliable, time saving, and applicable to treating a large number of the clinical samples.

Introduction

Resting B cells could be transformed by the Epstein-Barr virus (EBV) in vitro into actively proliferating B lymphoblastoid cell lines (B-LCLs). B-LCLs are similar to germ cells in differentiation and development, and the somatic mutation rate of B-LCLs was only 0.3%1, with negligible genetic and phenotypic alteration. Therefore, B-LCLs, as surrogates for peripheral blood mononuclear cells (PBMCs), have substantially accelerated the progress of genomics, transcriptomics and proteomics study of EBV associated diseases2,3. Moreover, B-LCLs also have important application in screening monoclonal antibodies4,5.

Several methods have been developed for the immortalization of B lymphocytes by EBV. The most major common procedures include the isolation of B lymphocytes and the use of B95-8 cell lines to produce infectious EBV. From isolation to transformation, these methods are divided into three strategies. Lymphocytes are separated from fresh blood by density gradient centrifugation and EBV transformation directly6-8, named density gradient separation method in this study. However, other techniques overcome the difficulty of shipping fresh blood and use a procedure for freezing purified lymphocytes and subsequent thawing and EBV infection9-11. Cryopreserved whole blood can also be used for the isolation of B lymphocytes and transformation12,13. In addition to density gradient centrifugation to separate B lymphocytes, some researchers use a magnetic cell sorter to select B lymphocytes12. However, magnetic separation is an expensive, complex and time consuming process. Although these methods are useful to immortalize B lymphocytes with a high success rate, the need to treat a large number of clinical samples and the relatively small volume of blood require a simpler method for the establishment of a permanent cell line.

Another less commonly used method is using whole blood as the source of nucleated cells for EBV infection and the establishment of B-LCLs. These methods simplify the technique by omitting the separation procedure. Only a small amount of whole blood, either fresh14 or frozen15,16, is sufficient to obtain the cell lines. Unfortunately, there is great variability in success from documents15,16 and several of our validation tests. Furthermore, transformed colonies are hardly recognized under a microscope because of the large contaminating impurities. Thus, a more reliable method for transformation is required.

Based on the above considerations, we have developed a novel method to establish B-LCLs without previous purification of the lymphocytes, named the red blood cell lysis method. This method is convenient, time saving and applicable to a large number of samples. As little as 0.5 mL of whole blood was enough to obtain B-LCLs that are easily obtainable from infants and the elderly without significantly harming their health.

Protocol

Este estudio fue aprobado por el Comité de Ética del Instituto de Genética y Biología del Desarrollo, y el protocolo sigue las directrices institucionales para el bienestar humano. 1. Preparación de virus EB En el día 1, descongelar las células B95-8 y la cultura en 6 ml de RPMI completo 1640, suplementado con 10% de suero fetal bovino, 2 mM L-glutamina, y antibióticos (100 mg / ml de estreptomicina, 100 U / ml de penicilina) en una matraz de cultivo T25. Colocar el frasco de cultivo en 5% de …

Representative Results

Durante el proceso de transformación, los cambios morfológicos de células se visualizaron por microscopía de luz (Figura 2). Pequeños grupos de células eran claramente visibles con el método de separación en gradiente de densidad después de 7 días de la infección, mientras que sólo una capa gruesa de fragmentos de células son visibles desde el método de lisis de glóbulos rojos. Sin embargo, los grupos de células linfoblásticas son visibles bajo la gruesa…

Discussion

Se presenta el desarrollo de un nuevo método para inmortalizar células B humanas a partir de sangre completa por lisis de las células rojas de la sangre, y su viabilidad celular de establecido B-LCLs se evaluó por el ensayo MTT. Los resultados mostraron que la viabilidad de las células de B-LCLs establecidos por el método de lisis de glóbulos rojos es mucho mayor que la del método de separación en gradiente de densidad. La principal ventaja del método de lisis de glóbulos rojos es que es simple y requiere un …

Disclosures

The authors have nothing to disclose.

Acknowledgements

This work was supported by the key projects of Chinese Academy of Sciences (KFZD-SW-205), strategic biological resources technology support system of Chinese Academy of Sciences (CZBZX-1).

Materials

Centrifuge Techcomp CT6T Centrifugation
Automated Cell Counter  Countstar  IC 1000  For cell counting 
 Epoch Microplate Spectrophotometer BioTek Instruments SN263839 For measuring the absorbance
96 well cell culture cluster Corning Incorporated 3599 Polystyrene plates
24 well cell culture cluster Corning Incorporated 3524 Polystyrene plates
25cm2 cell culture flask Nest 707001 Polystyrene 
FBS Gibco 10270 Component of B-LCLs medium
RPMI Medium 1640 Gibco 31800-022 For B-LCLs medium
L-Glutamine   Amresco 0374 Component of B-LCLs medium
100 x streptomycin penicillin solution BioRoYeeBRY-2309 BioRoYee BRY-2309 Component of B-LCLs medium
Ficoll paque plus GE  Healthcare 17-1440-03 For in vitro isolation of lymphocyte
PHA-M Sigma L8902 For stimulating lymphocyte proliferation
Cyclosporin A Cayman  Chemical 12088 For inhibiting the cytotoxicity effect of T cells
Red cell lysis buffer Tiangen RT122-01 For lysing red blood cell
MTT Amresco 0793 For the detection of cell viability
DMSO Sigma D2650 For freezing cells

References

  1. Mohyuddin, A., et al. Genetic instability in EBV-transformed lymphoblastoid cell lines. Biochim Biophys Acta. 1670 (1), 81-83 (2004).
  2. Hu, V. W., Frank, B. C., Heine, S., Lee, N. H., Quackenbush, J. Gene expression profiling of lymphoblastoid cell lines from monozygotic twins discordant in severity of autism reveals differential regulation of neurologically relevant genes. BMC Genomics. 7, 118 (2006).
  3. Toda, T., Sugimoto, M. Proteome analysis of Epstein-Barr virus-transformed B-lymphoblasts and the proteome database. J Chromatogr B Analyt Technol Biomed Life Sci. 787 (1), 197-206 (2003).
  4. Chiorazzi, N., Wasserman, R. L., Kunkel, H. G. Use of Epstein-Barr virus-transformed B cell lines for the generation of immunoglobulin-producing human B cell hybridomas. J Exp Med. 156 (3), 930-935 (1982).
  5. Traggiai, E., et al. An efficient method to make human monoclonal antibodies from memory B cells: potent neutralization of SARS coronavirus. Nat Med. 10 (8), 871-875 (2004).
  6. Hussain, T., Kotnis, A., Sarin, R., Mulherkar, R. Establishment & characterization of lymphoblastoid cell lines from patients with multiple primary neoplasms in the upper aero-digestive tract & healthy individuals. Indian J Med Res. 135 (6), 820-829 (2012).
  7. Neitzel, H. A Routine Method for the Establishment of Permanent Growing Lymphoblastoid Cell-Lines. Hum Genet. 73 (4), 320-326 (1986).
  8. Oh, H. M., et al. An efficient method for the rapid establishment of Epstein-Barr virus immortalization of human B lymphocytes. Cell Prolif. 36 (4), 191-197 (2003).
  9. Louie, L. G., King, M. C. A Novel-Approach to Establishing Permanent Lymphoblastoid Cell-Lines – Epstein-Barr-Virus Transformation of Cryopreserved Lymphocytes. Am J Hum Genet. 48 (3), 637-638 (1991).
  10. Tremblay, S., Khandjian, E. V. Successful use of long-term frozen lymphocytes for the establishment of lymphoblastoid cell lines. Clin Biochem. 31 (7), 555-556 (1998).
  11. Reidy, J. A., Wheeler, V. A. Sample age and Epstein-Barr virus transformation of cryopreserved lymphocytes. In Vitro Cell Dev Biol. 28 (6), 383-384 (1992).
  12. Amoli, M. M., Carthy, D., Platt, H., Ollier, W. E. R. EBV immortalization of human B lymphocytes separated from small volumes of cryo-preserved whole blood. Int J Epidemiol. 37, 41-45 (2008).
  13. Lacelle, C., Wang, E. Establishing lymphoblastoid cell lines from frozen blood of extremely old individuals. Mech Ageing Dev. 123 (10), 1415-1418 (2002).
  14. Tohda, H., Oikawa, A., Kudo, T., Tachibana, T. A greatly simplified method of establishing B-lymphoblastoid cell lines. Cancer Res. 38 (10), 3560-3562 (1978).
  15. Ventura, M., et al. Use of a Simple Method for the Epstein-Barr Virus Transformation of Lymphocytes from Members of Large Families of Reunion Island. Hum Hered. 38 (1), 36-43 (1988).
  16. Chenevixtrench, G., Kerr, B., Walters, M. Lymphoblastoid Cell-Lines from Frozen Whole-Blood – a Quick and Economical Safeguard for Linkage Analysis. Am J Hum Genet. 46 (1), 635-636 (1990).
  17. Hansen, M. B., Nielsen, S. E., Berg, K. Re-Examination and Further Development of a Precise and Rapid Dye Method for Measuring Cell-Growth Cell Kill. J Immunol Methods. 119 (2), 203-210 (1989).
  18. Bogoslovsky, T., et al. Preservation and enumeration of endothelial progenitor and endothelial cells from peripheral blood for clinical trials. Biomark Med. 9 (7), 625-637 (2015).
  19. Ambach, A., Bonnekoh, B., Gollnick, H. Routine flow cytometric immuno-staining of T-cell perforin is preserved using diethylene glycol for erythrocyte-lysis but lost by the use of ammonium chloride. Exp Dermatol. 12 (6), 825-831 (2003).
  20. Beck, J. C., Beiswanger, C. M., John, E. M., Satariano, E., West, D. Successful transformation of cryopreserved lymphocytes: A resource for epidemiological studies. Cancer Epidemiol Biomarkers Prev. 10 (5), 551-554 (2001).
  21. Tosato, G., Cohen, J. I. Generation of Epstein-Barr Virus (EBV)-immortalized B cell lines. Curr Protoc Immunol. , 22 (2007).

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Cite This Article
Liu, X., Xu, C., Duan, Z. A Simple Red Blood Cell Lysis Method for the Establishment of B Lymphoblastoid Cell Lines. J. Vis. Exp. (119), e55191, doi:10.3791/55191 (2017).

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