Immortalized hepatocyte cell line secreting modified insulin...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/071 (2010.01) A61K 35/407 (2006.01) A61K 48/00 (2006.01) A61P 3/10 (2006.01) C12N 5/10 (2006.01) C12N 15/85 (2006.01) C12N 15/90 (2006.01) C07K 14/62 (2006.01)

Patent

CA 2435274

The present invention provides a cell line which can be substituted for .beta. cells in human mature pancreatic islets and express insulin in a glucose-concentration dependent manner, and enables the easy obtainment of the number of cells which meets the demand, The present invention also provides a therapeutical cell preparation for treating diabetes. The cell lines of the present invention can be obtained by integrating both a nucleotide sequence encoding tamoxifen-induced Cre recombinase and a nucleotide sequence encoding insulin regulated by glucose-sensitive promoter into the chromosome in a human immortalized hepatic cell line FERM BP-7498 containing the TERT gene inserted in between a pair of LoxP sequences.

L'invention concerne une lignée cellulaire associée à des cellules pancréatiques beta mûres humaines, pouvant exprimer de l'insuline en fonction de la concentration de glucose, et pouvant facilement être fixée dans une numération cellulaire nécessaire. L'invention concerne une préparation cellulaire utilisable dans le traitement des diabètes. Cette lignée cellulaire peut être obtenue par l'intégration d'une séquence nucléotidique codant une recombinase Cre inductible par tamoxifène et une autre séquence nucléotidique codant l'insuline lors de la régulation d'un promoteur de sensibilité au glucose dans le chromosome d'une lignée cellulaire hépatique immortalisée et humaine FERM BP-7498 contenant le gène hTERT inséré entre une paire de séquences LoxP.

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