Human neurogenin 3-encoding nucleotide sequences

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) C12N 5/071 (2010.01) C12N 15/113 (2010.01) A61K 35/12 (2006.01) C07K 14/47 (2006.01) C07K 16/18 (2006.01) C12N 5/10 (2006.01) C12N 15/63 (2006.01) C12P 21/02 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2365961

The present invention features a human neurogenin3 (Ngn3) polypeptide and nucleotide sequences encoding Ngn3 polypeptides. In a particular aspect, the polynucleotide is the nucleotide sequence of SEQ ID NO:1. In addition, the invention features isolated nucleic acid sequence comprising an Ngn3 promoter, as well as a polynucleotide sequences that hybridize under stringent conditions to SEQ ID NO:1. In related aspects the invention features expression vectors and host cells comprising polynucleotides that encode a human Ngn3 polypeptide. The present invention also relates to antibodies that bind specifically to a human Ngn3 polypeptide, methods for producing human Ngn3 polypeptides, methods for identifying .beta.-cell precursor cells expressing Ngn3, methods for using the Ngn3 gene and the Ngn3 polypeptide to alter cellular differentiation in culture or in vivo to produce new .beta.- cells to treat patients with diabetes mellitus, and identification of individuals at risk for diabetes by detecting alteration in Ngn3 coding and regulatory sequences and Ngn3 expression levels.

La présente invention concerne un polypeptide de neurogénine 3 humaine (Ngn3) et des séquences nucléotidiques codant les polypeptides Ngn3. Dans un aspect particulier, le polynucléotide est la séquence nucléotidique de SEQ ID NO:1. De plus, l'invention a trait à une séquence d'acide nucléique isolée contenant un promoteur de Ngn3, et à des séquences polynucléotidiques s'hybridant dans des conditions strictes à SEQ ID NO:1. Dans d'autres aspects l'invention concerne des vecteurs d'expression et des cellules hôtes contenant des polynucléotides codant un polypeptide Ngn3 humain. L'invention concerne également des anticorps se fixant spécifiquement à un polypeptide Ngn3 humain, des méthodes de production des polypeptides Ngn3 humains, des méthodes d'identification de cellules précurseurs des cellules .beta. exprimant Ngn3, des méthodes d'utilisation du gène Ngn3 et du polypeptide Ngn3 afin de modifier la différenciation cellulaire en culture ou in vivo pour produire de nouvelles cellules .beta. afin de traiter des patients atteints de diabète sucré, et d'identification d'individus présentant un risque de diabète par détection d'une modification dans les séquences de codage et de régulation de Ngn3 et dans les niveaux d'expression de Ngn3.

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