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임백빈,신말순,김태수 한국운동영양학회 2013 Physical Activity and Nutrition (Phys Act Nutr) Vol.17 No.3
Depression is one of the most common psychiatric symptoms in hypothyroidism. Depression following hypothyroidism is closely associated with reduced activity of the serotonergic system. Physical exercise has positive effects for mental diseases such as depression. In the present study, we investigated the effects of treadmill exercise on the depressive-like symptom, 5-hydroxytryptamine (5-HT)and tryptophan hydroxylase (TPH) expression in the dorsal raphe nucleus of the rat pups with hypothyroidism. On the day of perinatal 14, pregnant rats were divided into two groups (n = 5 in each group): the pregnant control group and the pregnant methimazole (MMI)-treated group. For the induction of hypothyroidism in the rat pups, MMI was added to the drinking water, from the day of perinatal 14 to postnatal 49. After delivery, male rat pups born from the pregnant control group were assigned to the control group. Male rat pups born from the MMI-treated group were divided into the hypothyroidism-induction (HI) group and the hypothyroidism-induction with treadmill exercise (HIT) group (n = 10 in each group). The rat pups in the exercise group were forced to run on a treadmill for 30 min once a day for 4 weeks, starting on postnatal day 22. In the hypothyroidism-induced rat pups,5-HT synthesis and TPH expression was reduced in the dorsal raphe nucleus. Treadmill exercise alleviated hypothyroidism-induced depressive state by enhancing serotonergic related genes. These results suggest that treadmill exercise can be used as a therapeutic agent for hypothyroidism patients with depression.
고온과 저온 환경에서의 트레드밀 운동이 흰쥐 해마에서 c-Fos 발현과 비복근에서의 HSP 70 발현에 미치는 영향
한국생활환경학회 2009 한국생활환경학회지 Vol.16 No.6
<P>In the present study was to examine the effect of treadmill exercise under heat and cold stress conditions on c-Fos expression in the hippocampus and HSP 70 expression in the gastrocnemius muscle. c-Fos expression represents neuronal activity and plays a crucial role in the brain development. Physical exercise is known to enhance neuronal plasticity and activity. Heat shock protein 70 (HSP 70) is the best characterized stress-responsive gene with enhanced expression and thought to be a protective factor against environmental stress in a cell. For this study, male Sprague-Dawley rats weighing 250±10 g (7 weeks in age) were used. The rats were randomly divided into six groups (n=10 in each group): the control in 4℃ group, the exercise in 4oC group, the control in 22℃ group, the exercise in 22℃ group, the control in 35℃ group, and the exercise in 35℃ group. The environmental temperature at 22℃ set as the normal conditions, 4℃ was as the cold stress conditions and 35℃ was as the heat stress conditions. In the cold conditions, the temperature was 4oC with relative humidity 40%. In the normal conditions, the temperature was 22℃ with relative humidity 40%. In the heat stress conditions, temperature was 35℃ with relative humidity 20%. Animals were sacrificed immediately after finishing the last session of treadmill exercise on the 5 weeks of the experiment. The present results showed that exposure under normal, cold and heat stress conditions exerted no signifiant effect on the c-Fos expression. However, the c-Fos expression in the hippocampus was increased by treadmill exercise, showing that cold stress and heat stress acted as the decreasing factor of c-Fos. The HSP 70 expression in the gastrocnemius was increased by treadmill exercise for 5 weeks under normal, cold and heat conditions, however, the increasing of HSP 70 was not appeared that exposure under the cold and heat stress conditions. The present study revealed that treadmill exercise exerted improvement effect on impairment of environmental stress through enhancing of c-Fos and increasing of HSP 70.</P>