Work

Gene expression analysis of immunostained endothelial cells isolated from formaldehyde‐fixated paraffin embedded tumors using laser capture microdissection—A technical report

Year: 2009

Type: article

Abstract: Laser capture microdissection (LCM) allows microscopic procurement of specific cell types from tissue sections that can then be used for gene expression analysis. In conventional LCM, frozen tissues stained with hematoxylin are normally used to the molecular analysis. Recent studies suggested that it is possible to carry out gene expression analysis of formaldehyde-fixated paraffin embedded (FFPE) tissues that were stained with hematoxylin. However, it is still unclear if quantitative gene expression analyses can be performed from LCM cells from FFPE tissues that were subjected to immunostaining to enhance identification of target cells. In this proof-of-principle study, we analyzed by reverse transcription-PCR (RT-PCR) and real time PCR the expression of genes in factor VIII immunostained human endothelial cells that were dissected from FFPE tissues by LCM. We observed that immunostaining should be performed at 4 degrees C to preserve the mRNA from the cells. The expression of Bcl-2 in the endothelial cells was evaluated by RT-PCR and by real time PCR. Glyceraldehyde-3-phosphate dehydrogenase and 18S were used as house keeping genes for RT-PCR and real time PCR, respectively. This report unveils a method for quantitative gene expression analysis in cells that were identified by immunostaining and retrieved by LCM from FFPE tissues. This method is ideally suited for the analysis of relatively rare cell types within a tissue, and should improve on our ability to perform differential diagnosis of pathologies as compared to conventional LCM.

Source: Microscopy Research and Technique

DOI: 10.1002/jemt.20734

Authors: Tomoatsu Kaneko, Takashi Okiji, Reika Kaneko, Hideaki Suda, Jacques E. Nör

Institutions: Tokyo Medical and Dental University, University of Michigan, Niigata University, U-M Rogel Cancer Center

Language: English

Topic: Molecular Biology Techniques and Applications

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: bronze

Funders: National Institutes of Health, Japan Society for the Promotion of Science, National Cancer Institute, National Institute of Dental and Craniofacial Research