Undifferentiated stem cell culture systems
First Claim
1. A method for deriving one or more undifferentiated pluripotent cells from a human embryo, comprising:
- providing in vitro fertilized embryos;
culturing the embryos to a blastocyte stage;
isolating inner cellular mass (ICM) from the blastocyte; and
culturing the ICM in suspension with a feeder free culture system comprising a basic media, a TGFβ
superfamily factor, and a serum replacement to obtain clusters capable of propagating that comprise the one or more undifferentiated pluripotent cells.
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Abstract
The present disclosure provides methods for maintaining and propagating undifferentiated pluripotent stem cells (SC) in suspension. The methods comprise culturing such SC in a non-adherent culture dish under conditions comprising a basic serum free medium and one or more of a basic medium, a serum replacement, an extra cellular matrix component and a factor supporting expansion of said SC. A specific and preferred culture condition comprise supplementing Neurobasal™ medium with KO serum replacement (KOSR). These conditions allowed for large scale and long term propagation of undifferentiated pluripotent SC. The culture system comprising suspended undifferentiated pluripotent SC were found to have many applications including in methods for directed as well as spontaneous differentiation of the SC into somatic cells. Also disclosed herein is a method of deriving SC, preferably human embryonic SC from human embryos via the formation of cell clusters.
13 Citations
6 Claims
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1. A method for deriving one or more undifferentiated pluripotent cells from a human embryo, comprising:
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providing in vitro fertilized embryos; culturing the embryos to a blastocyte stage; isolating inner cellular mass (ICM) from the blastocyte; and culturing the ICM in suspension with a feeder free culture system comprising a basic media, a TGFβ
superfamily factor, and a serum replacement to obtain clusters capable of propagating that comprise the one or more undifferentiated pluripotent cells. - View Dependent Claims (2, 3, 4, 5)
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6. A method for deriving one or more undifferentiated pluripotent cells comprising:
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culturing at least one fertilized embryo to obtain at least one blastocyte; isolating inner cell mass (ICM) from the one or more of the at least one blastocyte; and culturing the ICM in suspension with a feeder free culture system comprising a basic media, a TGFβ
superfamily factor, and a serum replacement to obtain clusters capable of propagating that comprise the one or more undifferentiated pluripotent cells.
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Specification