Pharmacological activity of 8α,9α- and 8β,9β-epoxyhexahydrocannabinol in mice

I. Yamamoto, S. Narimatsu, K. Watanabe, H. Yoshimura

Research output: Contribution to journalArticle

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Abstract

Pharmacological activity of epoxide derivatives of Δ8-tetrahydrocannabinol (THC), 8α, 9α- and 8β, 9β-epoxyhexahydrocannabinol (EHHC), was compared with that of Δ8-THC in mice using catalepsy, hypothermia and prolongation of pentobarbital-induced sleep as index. ED50s for catalepsy of 8α, 9α,-EHHC, 8β, 9β-EHHC and Δ8-THC were 6.40, 0.87 and 3.30 mg/kg, i.v., respectively. The most effective cannabinoid inducing hypothermia was also 8β, 9β-EHHC followed by Δ8-THC. 8α, 9α-EHHC was least active. By treatments (5 mg/kg, i.v.) with 8α, 9α-EHHC, 8β, 9β-EHHC and Δ8-THC, pentobarbital-induced sleeping time was prolonged 1.7, 3.3 and 2.5 folds, respectively, as compared with that of 1% Tween 80-saline control. From these results, the pharmacological activity of the cannabinoids tested was ranked in the following order; 8β, 9β-EHHC > Δ8-THC>8α, 9α-EHHC.

Original languageEnglish
Pages (from-to)409-417
Number of pages9
JournalResearch Communications in Substances of Abuse
Volume2
Issue number4
Publication statusPublished - 1981
Externally publishedYes

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Dronabinol
Pharmacology
Catalepsy
Cannabinoids
Pentobarbital
Hypothermia
Polysorbates
Sleep

ASJC Scopus subject areas

  • Medicine (miscellaneous)

Cite this

Yamamoto, I., Narimatsu, S., Watanabe, K., & Yoshimura, H. (1981). Pharmacological activity of 8α,9α- and 8β,9β-epoxyhexahydrocannabinol in mice. Research Communications in Substances of Abuse, 2(4), 409-417.

Pharmacological activity of 8α,9α- and 8β,9β-epoxyhexahydrocannabinol in mice. / Yamamoto, I.; Narimatsu, S.; Watanabe, K.; Yoshimura, H.

In: Research Communications in Substances of Abuse, Vol. 2, No. 4, 1981, p. 409-417.

Research output: Contribution to journalArticle

Yamamoto, I, Narimatsu, S, Watanabe, K & Yoshimura, H 1981, 'Pharmacological activity of 8α,9α- and 8β,9β-epoxyhexahydrocannabinol in mice', Research Communications in Substances of Abuse, vol. 2, no. 4, pp. 409-417.
Yamamoto, I. ; Narimatsu, S. ; Watanabe, K. ; Yoshimura, H. / Pharmacological activity of 8α,9α- and 8β,9β-epoxyhexahydrocannabinol in mice. In: Research Communications in Substances of Abuse. 1981 ; Vol. 2, No. 4. pp. 409-417.
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