Isolated porcine pancreatic cells for use in treatment of...

A - Human Necessities – 61 – K

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A61K 35/39 (2006.01) C12N 5/06 (2006.01)

Patent

CA 2203032

Isolated porcine pancreatic cells, isolated populations of such cells and methods for isolating and using the cells to treat subjects with diseases characterized by insufficient insulin activity are described. The porcine pancreatic cells are preferably non-insulin-secreting porcine pancreatic cell having the ability to differentiate into aninsulin-secreting cell upon introduction into a xenogeneic subject, such as a human subject. Such cells include embryonic porcine pancreatic cells obtained from embryonic pigs between about day 31 and day 35 of gestation. The porcine pancreatic cells can be modified to be suitable for transplantation into a xenogeneic subject, for example, by altering an antigen (e.g., an MHC class I antigen) on the cell surface which is capable of stimulating an immune response against the cell in the subject (e.g., by contact with an anti-MHC class I antibody, or a fragment or derivative thereof). The isolated porcine pancreatic cells of the invention can be used to treat diseases characterized by insufficient insulin activity, e.g., Type I and Type II diabetes, by administering the cells to a subject having such a disease.

Cellules pancréatiques porcines isolées, populations isolées de ces cellules et leurs procédés d'utilisation pour le traitement de patients présentant des troubles caractérisés par une insuffisante activité de l'insuline. Lesdites cellules sont de préférence du type non sécrétrices d'insuline et présentant la faculté de se constituer en cellules sécrétrices d'insuline lors de leur introduction dans un sujet xénogénique tel que l'homme. Ces cellules peuvent notamment provenir d'embryons de porcs ayant entre 31 et 35 jours de gestation; on peut les modifier en vue de leur transplantation chez un sujet xénogénique, par exemple en transformant un antigène (par exemple un antigène CMH de classe I) de la surface de la cellule susceptible de stimuler une réponse immunitaire du sujet contre la cellule (par exemple par contact avec un antigène CMH de classe I ou l'un de des fragments ou dérivés). Les cellules pancréatiques porcines isolées objet de l'invention peuvent servir à traiter des troubles caractérisés par une insuffisante activité de l'insuline, par exemple les diabètes de type I et II.

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