Figure 6. The effects of heterochronic parabiosis on the length of the telomere and the expression of TERC or TERT mRNA in mice. The telomere length in the liver (A), kidney (B) and heart (C) and the expression of TERC (D, F and H) or TERT mRNA (E, G and I) in the liver (D and E), kidney (F and G) and heart (H and I) were determined in Y-Y, Y-O(Y), O-O and Y-O(O) mice using real-time PCR as described in Methods and Materials. Data are presented as means ± SEM (n=3). *p<0.05 and **p<0.01 vs. the control.