Method of cell isolation
First Claim
1. A method for isolating a substantially homogeneous population of mammary stem (MaSCs) cells comprising:
- obtaining mammary tissue;
disrupting said mammary tissue to provide a heterogenous population of cells comprising the MaSCs to be isolated;
contacting the heterogeneous population of cells with specific binding partners for each of the following markers;
CD45, TER119, CD31, CD24 and CD29; and
selecting cells in the heterogeneous population that demonstrate a low amount of binding to the specific binding partners for CD45, TER119, CD31 and a high amount of binding to the specific binding partners for the CD24 and CD29 markers such that said cells are CD45loTER119loCD31loCD24hiCD29hi,thereby obtaining a substantially homogeneous population of MaSCs.
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Abstract
The present invention relates generally to a method for the generation of a substantially homogenous population of undifferentiated cells. More particularly, the present invention relates to a method for isolating a substantially homogenous population of stem cells, and in particular, mammary stem cells (MaSCs). The MaSCs of the present invention are isolated on the basis of differential levels of proteins present on their cell surface. The MaSCs of the present invention are particularly useful as targets for identifying agents which modulate MaSC survival, self-renewal, proliferation and/or differentiation in both normal and diseased tissue such as, but not limited to, tumor tissue, and, also as source of tissue for the regeneration, replacement and/or augmentation of tissue damaged and/or lost after disease or injury.
4 Citations
11 Claims
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1. A method for isolating a substantially homogeneous population of mammary stem (MaSCs) cells comprising:
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obtaining mammary tissue; disrupting said mammary tissue to provide a heterogenous population of cells comprising the MaSCs to be isolated; contacting the heterogeneous population of cells with specific binding partners for each of the following markers;
CD45, TER119, CD31, CD24 and CD29; andselecting cells in the heterogeneous population that demonstrate a low amount of binding to the specific binding partners for CD45, TER119, CD31 and a high amount of binding to the specific binding partners for the CD24 and CD29 markers such that said cells are CD45loTER119loCD31loCD24hiCD29hi, thereby obtaining a substantially homogeneous population of MaSCs. - View Dependent Claims (2, 3, 4, 8)
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5. A substantially homogenous population of MaSCs selected according to a method comprising:
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obtaining mammary tissue; disrupting said mammary tissue to provide a heterogenous population of cells comprising the MaSCs to be isolated; contacting the heterogeneous population of cells with specific binding partners for each of the following markers;
CD45, TER119, CD31, CD24 and CD29; andselecting cells in the heterogeneous population that demonstrate a low amount of binding to the specific binding partners for CD45, TER119, CD31 and a high amount of binding to the specific binding partners for the CD24 and CD29 markers, wherein said cells are CD45loTER119loCD31loCD24hiCD29hi, thereby obtaining the substantially homogeneous population of MaSCs, wherein said substantially homogenous population of MaSCs is at least 50% pure with regard to the CD45loTER119loCD31loCD24hiCD29hi phenotype and is depleted of Hoechst33342-effluxing side population (SP) cells compared to the number of SP cells in an overall CD45loTER119loCD31lo population isolated from said mammary tissue. - View Dependent Claims (6, 7, 9, 11)
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10. A substantially homogenous population of MaSCs, wherein at least 50% of the cells in the population are CD45loTER119loCD31loCD24hiCD29hi, and wherein said substantially homogenous population of MaSCs is depleted of Hoechst33342-effluxing side population (SP) cells compared to the number of SP cells in an overall CD45loTER119loCD31lo population isolated from said mammary tissue.
Specification