The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2000
Filed:
Nov. 19, 1997
Stephen L Smith, Arlington Heights, IL (US);
Xiaoying Qiao, Waukegan, IL (US);
Susan M Maciukas, El Cerrito, CA (US);
Maureen F Loudovaris, Grayslake, IL (US);
James G Bender, Lindenhurst, IL (US);
Dennis Van Epps, Cary, IL (US);
Nexell Therapeutics, Inc., Irvine, CA (US);
Abstract
Provided are serum-free, animal protein-free media formulations to be used in conjunction with hematopoietic growth factors for the in vitro growth of human neutrophil and megakaryocyte precursors. The medium contains a base medium, corticosteroid, transferrin, insulin, cholesterol, ethanolamine, and human albumin. Also provided are methods for preparing serum-free, animal protein-free suspensions of human hematopoietic precursor cells wherein the cellular component contains at least about 16% neutrophil precursors and at least about 1% megakaryocyte precursors. Serum-free, animal protein-free suspensions of human hematopoietic cells are provided wherein the cellular component comprises at least about 30%, preferably greater than 60% neutrophil precursors. The neutrophil precursors are comprised of blast cells, promyclocytes, neutrophilic myelocytes, and neutrophilic metamyelocytes. Serum-free, animal protein-free cells suspensions are provided wherein the cellular component comprises at least about 3%, preferably greater than 8% megakaryocyte precursors. Also provided are serum-free, animal protein free cell suspensions wherein the cellular component comprises colony-forming cells and cluster-forming cells.