抄録
Our previous study demonstrated that zinc deficient (ZnX) rats fed zinc deficient diet during 4 weeks enhanced sodium preference (Futani et al., 2005). In the present study, we conducted behavioral experiment to investigate whether feeding period of zinc deficient diet affect this sodium preference or not. As the zinc deficient animals, male Wistar rats fed the zinc deficient diet during 1 week after the weaning were used. Results were as follows; (1) In the long-term (48 h) two-bottle preference test, the preference percents for 0.1 and 0.3M NaCl in some ZnX rats were higher than those in the control rats. (2) In the short-term (10 min) test, there was no significant difference in the preference percents between ZnX and control rats. These results suggest that 1 week is enough period for some rats to occur high sodium preference and taste may not play a role for enhancement of this sodium preference. [J Physiol Sci. 2006;56 Suppl:S224]
