Table 3: Senescence markers in irradiated fibroblasts.

MarkerControlIrradiated

IL8RNegative100++
RBL28, 12 (mitotic)++94, 96+
RB1100++30, 33+
P53Negative100++
CCNA 17, 20++Negative
P21Negative100+++
P15Negative100+
HP1γ<1++100+++

Percentage positive cells for respective marker are shown. +,++,+++ indicate weak, medium, and strong expression, respectively. Mitotic: expression seen only in mitotic cells. Results from two experiments are shown. Two values are shown when there was variation between the experiments.