We examined six experimental groups of 20 - week - old C57BL /
6J mice: (a) lean C57BL /
6J female
mice, (b) lean C57BL /
6J male
mice, (c) moderately
obese C57BL /
6J male
mice with diet - induced obesity, (d) moderately
obese female B6.Cg Ay / +
mice, (e) severely
obese female B6.V Lepob / ob
mice, and (f) severely
obese male B6.V Lepob / ob
mice.