In vivo assay for testing the phenotypic stability

C - Chemistry – Metallurgy – 12 – N

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Details

C12N 5/0775 (2010.01) C12N 5/071 (2010.01) A61K 35/32 (2006.01) A61K 49/00 (2006.01) A61L 27/38 (2006.01) C07K 16/28 (2006.01) C12N 15/09 (2006.01) C12Q 1/00 (2006.01) C12Q 1/04 (2006.01) C12Q 1/48 (2006.01) C12Q 1/68 (2006.01) C40B 30/04 (2006.01) G01N 33/53 (2006.01) G01N 33/566 (2006.01) G01N 33/573 (2006.01)

Patent

CA 2397610

An in vivo assay to measure anchorage-independent growth and phenotypic stability of a certain cell population comprising subcutaneous or intramuscular injection in a mammal of a cell suspension of articular chondrocytes in an iso-osmotic liquid, the same suspension comprising articular chondrocytes in an amount equivalent to at least 1 x 106 chondrocytes as applied to immune-deficient mice. The outcome is linked to molecular markers. The present invention further relates to DNA chips and diagnostic tools comprising the latter to predict the outcome of ACT. Antibodies raised against positive and negative markers of chondrocyte stability can also be used for quality control on the chondrocytes. Therapeutical composition comprising stable chondrocytes are very useful for tissue repair.

L'invention se rapporte à une analyse in vivo de mesure de la croissance, indépendamment de l'ancrage, et de la stabilité phénotypique d'une population de cellules. Cette analyse consiste à injecter à un mammifère, de manière sous-cutanée ou intramusculaire, une suspension de cellules de chondrocytes articulaires dans un liquide iso-osmotique, la même suspension contenant des chondrocytes articulaires en quantité équivalente à au moins 1 x 10?6¿ chondrocytes lorsqu'elle est appliquée à une souris immunodéficiente. Le résultat est lié aux marqueurs moléculaires. La présente invention se rapporte également à des puces à ADN et à des outils diagnostiques comportant de telles puces, qui permettent de prédire le résultat d'une transplantation autologue de chondrocytes. Il est également possible d'utiliser des anticorps dirigés contre des marqueurs positifs et négatifs de la stabilité des chondrocytes aux fins d'un contrôle de qualité sur ces chondrocytes. Les compositions thérapeutiques comportant des chondrocytes stables sont très utiles pour les réparations tissulaires.

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