Journal
BIOLOGICAL & PHARMACEUTICAL BULLETIN
Volume 32, Issue 12, Pages 2065-2067Publisher
PHARMACEUTICAL SOC JAPAN
DOI: 10.1248/bpb.32.2065
Keywords
delta(9)-tetrahydrocannabinol; corticosterone; forced swim-stress
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20590552]
- The Advanced Materials Institute of Fukuoka University
- The Naito Foundation
- Suzuken Memorial Foundation
- Grants-in-Aid for Scientific Research [20590552] Funding Source: KAKEN
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The present study was designed to determine the effect of delta(9)-tetrahydrocannabinol (THC) on susceptibility to stress. We reported that THC significantly prolonged the immobility time during the forced swim-stress. The selective cannabinoid CB1 receptor antagonist O-2050 significantly reduced the enhancement of immobility by THC. We investigated the effect of THC on levels of stress hormone corticosterone under non-stress and forced swim-stress conditions. THC did not affect plasma corticosterone levels under non-stress conditions. However, THC, together with forced swim-stress, significantly increased plasma corticosterone levels. This effect was inhibited by O-2050. This evidence suggests that THC, under stressful conditions, enhances the susceptibility of the hypothalamus-pituitary-adrenal-axis to stress via the CB1 receptor, thereby increasing the risk of depression.
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