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Revista odontológica mexicana

Print version ISSN 1870-199X


MADERA ANAYA, Meisser Vidal  and  SUAREZ CAUSADO, Amileth. Evaluation of two RNA extraction methods in children's saliva. Rev. Odont. Mex [online]. 2017, vol.21, n.4, pp.245-252. ISSN 1870-199X.


To standardize an RNA (ribonucleic acid) extraction protocol in children's saliva specimens.


The study was conducted on saliva specimens from 60 children who participated in the study with their parents' authorization. Comparison of two RNA extraction methods was established; methods assessed concentration, quality and yield. Moreover, genie expression of GUSB gene was achieved with RT-PCR (reverse transcriptase-polymerase chain reaction). Data were analyzed through measurements of central tendency and dispersion, frequencies and percentages. Т-Student and χ2 tests were used in order to differentiate between both methods (p < 0.05).


Analysis of cell amounts per saliva ml revealed a mean of 564,977.8 (SD = 246,678.6); a RNA in children's saliva extraction method was standardized, specifically the method using RNeasy® Protect Saliva Mini Kit Qiagen exhibited better characteristics of RNA concentration (p = 0.0000) and yield (p = 0.0000) when compared to the method using QIAzór®; no RNA (p = 0.146) quality differences were found.


RNA could be extracted from children's saliva specimens, therefore, it is suggested to use saliva for the molecular analysis of different oral and systemic diseases.

Keywords : Saliva; RNA; transcriptome; biomarkers.

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