EPHA4-positive human adult pancreatic endocrine progenitor cells
First Claim
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1. A cell culture of propagating pancreatic cells produced by the steps of:
- (a) isolating pancreatic cells from a pancreas,(b) a EphA4 cell selection, and(c) a CD56 cell selection,wherein the EphA4 cell selection comprises(1) contacting the pancreatic cells with an EphA4 binding reagent;
(2) selecting pancreatic cells that specifically bind to the EphA4 binding reagent; and
(3) separating the selected pancreatic cells from pancreatic cells that do not bind the EphA4 binding reagent to obtain a culture of propagating EphAr pancreatic cells, andwherein the CD56 cell selection comprises(x) contacting the pancreatic cells with a CD56 binding reagent;
(y) selecting pancreatic cells that specifically bind to the CD56 binding reagent; and
(z) separating the selected pancreatic cells from pancreatic cells that do not bind the CD56 binding reagent to obtain a culture of propagating CD56+ pancreatic cells,wherein the propagating pancreatic cells have a capacity to differentiate into insulin producing cells and wherein the CD56 cell selection is performed before or after contacting the pancreatic cells with the EphA4 binding reagent.
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Abstract
The invention relates to the discovery of a selective cell surface marker that permits the selection of a unique subset of pancreatic stem cells having a high propensity to differentiate into insulin-producing cells or into insulin-producing cell aggregates.
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9 Claims
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1. A cell culture of propagating pancreatic cells produced by the steps of:
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(a) isolating pancreatic cells from a pancreas, (b) a EphA4 cell selection, and (c) a CD56 cell selection, wherein the EphA4 cell selection comprises (1) contacting the pancreatic cells with an EphA4 binding reagent; (2) selecting pancreatic cells that specifically bind to the EphA4 binding reagent; and (3) separating the selected pancreatic cells from pancreatic cells that do not bind the EphA4 binding reagent to obtain a culture of propagating EphAr pancreatic cells, and wherein the CD56 cell selection comprises (x) contacting the pancreatic cells with a CD56 binding reagent; (y) selecting pancreatic cells that specifically bind to the CD56 binding reagent; and (z) separating the selected pancreatic cells from pancreatic cells that do not bind the CD56 binding reagent to obtain a culture of propagating CD56+ pancreatic cells, wherein the propagating pancreatic cells have a capacity to differentiate into insulin producing cells and wherein the CD56 cell selection is performed before or after contacting the pancreatic cells with the EphA4 binding reagent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cell culture comprising a substantially homogenous preparation of propagating pancreatic cells expressing both CD56 and EphA4, wherein the propagating pancreatic cells have the capacity to differentiate into insulin producing cells.
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