Methods of evaluating cells and cell cultures

G - Physics – 01 – N

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G01N 33/50 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2682948

Methods of evaluating the composition of a cell culture (e.g., to distinguish chondrocytes from fibroblasts) and methods for evaluating the phenotype of an individual cell (e.g., as a chondrocyte) are disclosed. The methods may be used, for example, for assessing chondrocyte cultures used for treatment of cartilage defects. In some embodiments, the invention involves identifying cell culture composition or the identity of a cell based on expression level of a fibroblast marker. In other embodiments, the invention involves comparing expression levels of at least one chondrocyte marker and at least one fibroblast marker in a cell culture sample or in an individual cell. In illustrative embodiments, the chondrocyte marker is hyaluronan and proteoglycan link protein 1 (HAPLN1 ), and the fibroblast marker is microfibrillar associated protein 5 (MFAP5).

L'invention concerne des procédés d'évaluation de la composition d'une culture de cellules (par exemple, afin de distinguer les chondrocytes des fibroblastes) et des procédés d'évaluation du phénotype d'une cellule individuelle (par exemple, en tant que chondrocyte). Les procédés peuvent par exemple être utilisés pour évaluer des cultures de chondrocytes employées pour le traitement de défauts du cartilage. Dans certains modes de réalisation, l'invention consiste à identifier la composition de la culture de cellules ou l'identité d'une cellule d'après le niveau d'expression d'un marqueur de fibroblaste. Dans d'autres modes de réalisation, l'invention consiste à comparer les niveaux d'expression d'au moins un marqueur de chondrocyte et d'au moins un marqueur de fibroblaste dans un échantillon de culture de cellules ou dans une cellule individuelle. Dans des exemples de modes de réalisation, le marqueur de chondrocyte est la protéine de liaison des hyaluronanes et des protéoglycanes 1 (HAPLN1), et le marqueur de fibroblaste est la protéine associée aux microfibrilles 5 (MFAP5).

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