Method of inhibiting immune system destruction of...

A - Human Necessities – 61 – K

Patent

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Details

A61K 38/17 (2006.01) A61K 9/50 (2006.01) A61K 9/66 (2006.01) A61K 35/12 (2006.01) A61K 35/39 (2006.01) A61K 47/48 (2006.01) A61K 38/00 (2006.01) A61K 48/00 (2006.01) C12N 5/06 (2006.01)

Patent

CA 2232815

This invention provides a method of inhibiting viable cells transplanted into a subject from being destroyed by the subject's immune system which comprises: a) containing the viable cells, or tissue comprising the viable cells, prior to transplantation within a device comprising a semipermeable membrane; and b) treating the subject with a substance which inhibits an immune system costimulation event in an amount effective to inhibit the subject's immune sytem from responding to said contained cells or tissue. In one embodiment, the substance which inhibits an immune system costimulation event is CTLA4. Also provided by this invention is a method of treating diabetes in a subject which comprises: a) containing viable insulin-producing cells, or tissue comprising such cells, within a device comprising a semipermeable membrane; b) transplanting an effective amount of such contained viable insulin-producing cells into the subject; and c) treating the subject with an effective amount of a substance which inhibits an immune system costimulation event.

L'invention concerne un procédé permettant d'inhiber la destruction de cellules vivantes greffées chez un sujet par le système immunitaire dudit sujet. Ce procédé consiste à a) enfermer, avant la greffe, les cellules vivantes, ou du tissu contenant les cellules vivantes, dans un dispositif comportant une membrane semi-perméable, et b) à traiter le sujet avec une substance qui inhibe un phénomène de costimulation du système immunitaire, administrée en quantité utile pour empêcher le système immunitaire du sujet de répondre auxdites cellules ou audit tissu ainsi enfermés. Selon un mode de réalisation, la substance inhibant un phénomène de costimulation du système immunitaire est CTLA4. Cette invention concerne également un mode de traitement du diabète chez un sujet consistant à a) enfermer des cellules vivantes productrices d'insuline, ou du tissu contenant de telles cellules, dans un dispositif comportant une membrane semi-perméable; b) à greffer chez le sujet une quantité efficace de cellules vivantes productrices d'insuline ainsi enfermées; et c) à traiter le sujet avec une quantité utile d'une substance qui inhibe un phénomène de costimulation du système immunitaire.

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