Abstract
We have serially investigated the role of nutrients and growth factors for their ability to support the clonal growth of human bladder tumor cell lines. Five established human bladder tumor cell lines were selected for study of their requirements for clonogenic growth in semisolid cultures. We identified an “optimal medium” to be Alpha MEM medium, 15% horse serum, fiveμg./ml. of transferrin, fiveμg./ml. of insulin and 30mg./ml. of epidermal growth factor. The “optimal assay” enhanced the growth of human bladder tumor cell lines 2.5 times compared to the standard clonogenic assay. The resulting medium is less complicated to maintain, less expensive and supports the growth of human bladder tumor cell lines better than the standard clonogenic assay. (J. Urol, 143:1049-1052, 1990)
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