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The content of DNA and RNA in microparticles released by Jurkat and HL-60 cells undergoing in vitro apoptosis.

Abstract：

:Microparticles are small membrane-bound vesicles that are released from apoptotic cells during blebbing. These particles contain DNA and RNA and display important functional activities, including immune system activation. Furthermore, nucleic acids inside the particle can be analyzed as biomarkers in a variety of disease states. To elucidate the nature of microparticle nucleic acids, DNA and RNA released in microparticles from the Jurkat T and HL-60 promyelocytic cell lines undergoing apoptosis in vitro were studied. Microparticles were isolated from culture media by differential centrifugation and characterized by flow cytometry and molecular approaches. In these particles, DNA showed laddering by gel electrophoresis and was present in a form that allowed direct binding by a monoclonal anti-DNA antibody, suggesting antigen accessibility even without fixation. Analysis of RNA by gel electrophoresis showed intact 18s and 28s ribosomal RNA bands, although lower molecular bands consistent with 28s ribosomal RNA degradation products were also present. Particles also contained messenger RNA as shown by RT-PCR amplification of sequences for beta-actin and GAPDH. In addition, gel electrophoresis showed the presence of low molecular weight RNA in the size range of microRNA. Together, these results indicate that microparticles from apoptotic Jurkat and HL-60 cells contain diverse nucleic acid species, indicating translocation of both nuclear and cytoplasmic DNA and RNA as particle release occurs during death.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Reich CF 3rd,Pisetsky DS

doi

10.1016/j.yexcr.2008.12.014

subject

Has Abstract

pub_date

2009-03-10 00:00:00

pages

760-8

issue

5

eissn

0014-4827

issn

1090-2422

pii

S0014-4827(08)00534-X

journal_volume

315

pub_type

杂志文章

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