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

TY - JOUR

T1 - Extraction of RNA from archival tissues and measurement of thrombospondin-1 mRNA in normal, dysplastic, and malignant oral tissues

AU - Macluskey, M.

AU - Baillie, Robin

AU - Morrow, H.

AU - Schor, S. L.

AU - Schor, A. M.

N1 - dc.publisher: Elsevier

PY - 2006/4

Y1 - 2006/4

N2 - 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.

AB - 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.

KW - Thrombospondin-1

KW - Messenger RNA

KW - Mouth neoplasm

KW - Mouth mucosa

U2 - 10.1016/j.bjoms.2005.03.001

DO - 10.1016/j.bjoms.2005.03.001

M3 - Article

SN - 0266-4356

VL - 44

SP - 116

EP - 123

JO - British Journal of Oral and Maxillofacial Surgery

JF - British Journal of Oral and Maxillofacial Surgery

IS - 2

ER -