. Author manuscript; available in PMC: 2015 Sep 1.

Published in final edited form as: Cell Tissue Res. 2014 May 24;357(3):815–821. doi: 10.1007/s00441-014-1900-2

Table 1.

Morphometric data on volumetric composition (V_v%) of normal looking mitochondria (NMIT), vacuolated mitochondria (VMIT), intramyofibrillar lipid (IML) accumulation, and tubular aggregation (TA) in skeletal muscles of young (Y), old (O), and O mice in various parabiotic pairings with untreated (Y:O), castrated (ØY:O), and castrated + 1cm testosterone-treated young males (ØY+T:O).

Treatment	NMIT	VMIT	IML	TA
Y	5.55 ± 1.17^A	0.25 ± 0.05^A	0.17 ± 0.05^A	0^A
O	1.73 ± 0.33^B	2.23 ± 0.33^B	2.32 ± 0.01^B	9.30 ± 2.14^B
Y: O	4.40 ± 0.55^A	1.35 ± 0.29^C	1.23 ± 0.21^C	5.93 ± 0.55^B
ØY: O	1.92 ± 0.16^B	2.81 ± 0.91^B	3.02 ± 0.85^B	18.45 ± 4.63^C
ØY+T: O	10.86 ± 2.24^C	1.08 ± 0.07^C	0.69 ± 0.09^D	3.63 ± 0.44^D

V_v%, volume density expressed as a percentage of the myofibrillar volume. Values are given as mean ± SEM. In each column, means with unlike superscripts are significantly (P<0.05) different.