to determine whether old cells have a reduced response to a preparation of factors from human plasma with insulinlike activity ( ila ) , we analyzed the response to ila of early and late passage human fibroblasts from young , old , and progeric donors in the acute stimulation of [ 3h ] 2-deoxy-d-glucose ( 2dg ) uptake and the delayed stimulation of [ 3h ] thymidine ( tdr ) incorporation into dna .
C0007634
cells
C0016030
fibroblasts