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L. Z. Santiago-Va?zquez, L. K. Ranzer and R. G. Kerr, “Comparison of Two Total RNA Extraction Protocols Using the Marine Gorgonian Coral Pseudopterogorgia Elisabethae and its Symbiont Symbiodinium sp.,” Electronic Journal of Biotechnology, Vol. 9, No. 5, 2006, pp. 598-603.

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• TITLE: Simple Modifications to Standard TRIzol® Protocol Allow High-Yield RNA Extraction from Cells on Resorbable Materials

  AUTHORS: Juliana Tsz Yan Lee, Wai Hung Tsang, King Lau Chow

  KEYWORDS: Calcium Phosphate, Resorbable Materials, RNA Extraction, TRIzol, Acid Guanidium Thiocyanate - Phenol - Chloroform Extraction, TRI Reagent, TRIsure

  JOURNAL NAME: Journal of Biomaterials and Nanobiotechnology, Vol.2 No.1, January 27, 2011

  ABSTRACT: Resorbable bioceramics are attractive for medical applications such as bone substitution. Biochemical analysis on cells cultured on these biomaterials is vital to predict the impact of the materials in vivo and RNA extraction is an essential step in gene expression study using RT-qPCR. In this study, we describe simple modifications to the TRIzol® RNA extraction protocol widely used in biology and these allow high-yield extraction of RNA from cells on resorbable calcium phosphates. Without the modifications, RNA is trapped in the co-precipitated calcium compounds, rendering TRIzol® extraction method infeasible. Among the modifications, the use of extra TRIzol® to dilute the lysate before the RNA precipitation step is critical for extraction of RNA from porous ?-tricalcium phosphate (?-TCP) discs. We also investigate the rationale behind the undesirable precipitation so as to provide clues about the modifications required for other resorbable materials with high application potential in bone tissue engineering.