Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Expansion of MSCs to senescence. The four donor preparations (7764L, 7068L, 281L, and 260R) were passed as indicated in Figure 1 until no further propagation of the cells was apparent. As indicated in text, the cells remained viable but there was no further propagation when each of the samples was cultured for an additional 3 months.
