Amcell Corporation

Sheri Miraglia

David W Buck

Amy H Yin

Wayne G Godfrey

Wayne G Godfry

Compositions comprising a cell expressing an AC133 cell surface antigen and an antibody, or antigen binding fragment thereof, that specifically binds to the antigen are provided. Expression of the antigen is highly tissue specific. It is detected on a subset of hematopoietic progenitor and stem cells derived from human bone marrow, fetal bone marrow and liver, cord blood and adult peripheral blood. The subset of cells recognized by AC133 is CD34and contains substantially all of the CFU-GM activity present in the CD34population. This highly specific distribution of AC133 makes it exceptionally useful as a reagent for isolating and characterizing human hematopoietic progenitor and stem cells. Cells selected for expression of AC133 antigen can be further purified by selection for other hematopoietic stem cell and progenitor cell markers.

Composition comprising a cell expressing an AC133 cell surface antigen and an antibody or antigen-binding fragment

A hematopoietic progenitor cell antigen and reagents, notably antibodies, that specifically bind to the antigen are provided. Expression of the antigen is highly tissue specific. It is only detected on a subset of hematopoietic progenitor cells derived from human bone marrow, fetal bone marrow and liver, cord blood and adult peripheral blood. The subset of cells recognized by AC133 is CD34 and contains substantially all of the CFU-GM activity present in the CD34 population. This highly specific distribution of AC133 makes it exceptionally useful as a reagent for isolating and characterizing human hematopoietic progenitor and stem cells. Cells selected for expression of AC133 antigen can be further purified by selection for other hematopoietic stem cell and progenitor cell markers.

Human hematopoietic stem and progenitor cell antigen

An hematopoietic progenitor cell antigen, and antibodies that specifically bind to the antigen are provided. Expression of the antigen is highly tissue specific. It is only detected on a subset of hematopoietic progenitor cells derived from human bone marrow, fetal bone marrow and liver, cord blood and adult peripheral blood. The subset of cells recognized by AC133 is CD34.sup.bright, and contains substantially all of the CFU-GM activity present in the CD34.sup.+ population. This highly specific distribution of AC133 makes it exceptionally useful as a reagent for isolating and characterizing human hematopoietic progenitor and stem cells. Cells selected for expression of AC133 antigen may be further purified by selection for other hematopoietic stem cell and progenitor cell markers.

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Alameda, CA, United States of America

Sheri Miraglia