Extraction of RNA from archival tissues and measurement of thrombospondin-1 mRNA in normal, dysplastic, and malignant oral tissues

M. Macluskey, Robin Baillie, H. Morrow, S. L. Schor, A. M. Schor

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Thrombospondin-1 (TSP-1) is an extracellular matrix glycoprotein implicated in the regulation of angiogenesis and tumour development. Our objectives were to ascertain the quantity and quality of RNA extracted from archival, formalin-fixed, paraffin embedded, oral tissues and their application in measuring the concentrations of TSP-1 mRNA in these tissues. We compared three techniques of isolation of RNA as well as related experimental variables. TSP-1 mRNA was measured in specimens of normal, dysplastic, and malignant oral tissues by real-time reverse transcriptase polymerase chain reaction (RT-PCR). RNA suitable for analysis by real-time RT-PCR was obtained by the three techniques tested, although the yield varied depending on the protocol used (range 0.2–3.6 µg/mm3). The mean (S.D.) concentrations of TSP-1 mRNA relative to 18S were 21.1 (7.2) in normal oral tissues (n = 9), 11.0 (8.2) in dysplastic tissue (n = 8) and 7.3 (5.3) in carcinomatous tissue (n = 17). The difference between normal and carcinomatous specimens was significant (p = 0.01). This reduction in expression of TSP-1 mRNA from normal to dysplasia to carcinoma may favour the angiogenic drive that accompanies the development of oral tumours.
Original languageEnglish
Pages (from-to)116-123
Number of pages8
JournalBritish Journal of Oral and Maxillofacial Surgery
Volume44
Issue number2
DOIs
Publication statusPublished - Apr 2006

Keywords

  • Thrombospondin-1
  • Messenger RNA
  • Mouth neoplasm
  • Mouth mucosa

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