Method for transdermal nucleic acid sampling

A - Human Necessities – 61 – B

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A61B 17/20 (2006.01) A61B 10/00 (2006.01)

Patent

CA 2420343

A minimally invasive transdermal nucleic acid sampling method comprises piercing through the outermost layer of the skin (20) and into the underlying epidermis with a plurality of microprojections (4). Living skin cells in the underlying epidermis are disrupted, causing them to release their contents including their nucleic acids (i.e., DNA, RNA, fragments thereof or other polynucleic acid material found in teh cleic and/or mitochondria of cells). The nucleic acid is collected on the surfaces of the microprojections and/or in a separate nucleic acid collection reservoir. The collected nucleic acid is then analyzed using standard polymerase chain reaction (PCR) techniques. Optionally a suction device (10) applies a partial vacuum through openings (8) in the microprojetion member (6) to the microcuts in the skin (20) for enhance defflux of intraelular and extracellular (i.e., body) fluids containing the nucleic acid.

L'invention concerne une méthode d'échantillonnage d'acide nucléique transdermique peu invasive, qui consiste à percer la couche supérieure de la peau (20) pour atteindre l'épiderme sous-jacent, à l'aide de plusieurs microprojections (4). Des cellules cutanées vivantes de l'épiderme sous-jacent sont désorganisées, ce qui les amène à libérer leurs contenus, notamment leurs acides nucléiques (c.-à-d. l'ADN, l'ARN, leurs fragments ou autres matières d'acide polynucléique trouvés dans les noyaux et/ou les mitochondries de cellules). L'acide nucléique est recueilli sur les surfaces des microprojections et/ou dans un réservoir de collecte d'acide nucléique séparé. L'acide nucléique recueilli est ensuite analysé par des techniques de réaction en chaîne de la polymérase (PCR). Facultativement, un dispositif d'aspiration (10) opère une dépression partielle à travers des ouvertures (8) ménagés dans l'élément à microprojections (6), jusqu'aux microcoupures pratiquées dans la peau (20), afin d'améliorer l'écoulement de liquides (c.-à-d. organiques) intracellulaires et extracellulaires contenant l'acide nucléique.

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