cDNA microarray analysis with amplified RNA after isolation of intact cellular RNA from neoplastic and non-neoplastic prostate tissue separated by laser microdissections

Thelen,Paul; Burfeind,Peter; Grzmil,Michal; Voigt,Silke; Ringert,Rolf-Hermann; Hemmerlein,Bernhard

doi:10.3892/ijo.24.5.1085

May 2004 Volume 24 Issue 5

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May 2004 Volume 24 Issue 5

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Article

cDNA microarray analysis with amplified RNA after isolation of intact cellular RNA from neoplastic and non-neoplastic prostate tissue separated by laser microdissections

Authors:
- Paul Thelen
- Peter Burfeind
- Michal Grzmil
- Silke Voigt
- Rolf-Hermann Ringert
- Bernhard Hemmerlein
View Affiliations / Copyright

Affiliations: Department of Urology, Georg-August-Universität, D-37075 Göttingen, Germany. pthelen@gwdg.de
Pages: 1085-1092
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Published online on: May 1, 2004

https://doi.org/10.3892/ijo.24.5.1085
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Abstract

Laser microdissection is a valuable tool to prepare pure cell populations from complex tissues for further analyses. Gene expression studies by real-time RT-PCR and cDNA arrays of microdissected tissues are becoming widely used methods. The integrity and quantity of prepared RNA must be proven to ensure reliable results in subsequent applications such as quantitative RT-PCR and cDNA-arrays. In the present study we used RNAlater™ protected prostate tissue for laser microdissection of tumor and tumor-free tissues. RNA quality and quantity was assessed using automated capillary gel electrophoresis. By using quantitative real time-RT-PCR before and after mRNA amplification the insulin-like growth factor binding protein-3 (IGFBP-3) gene expression was shown to be down-regulated in three out of five cases and DD3 was up-regulated in cancer tissues in all cases. The up-regulation of DD3 and the down-regulation of IGFBP-3 gene expression in cancer tissue were conserved after RNA amplification. A cDNA microarray also revealed an IGFBP-3 down-regulation in cancer tissue as well as several genes known to be differerentially expressed in prostate cancer. Taken together, we present a novel method for the isolation of intact RNA from laser microdissection-derived prostate cancer tissue useful for downstream applications of real-time RT-PCR and cDNA microarrays.

Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

cDNA microarray analysis with amplified RNA after isolation of intact cellular RNA from neoplastic and non-neoplastic prostate tissue separated by laser microdissections

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Abstract

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