The invention discloses the application of Buxusemine H and Buxusemine L, a boxwood
alkaloid, in pharmaceutical preparation, and belongs to the field of
pharmaceutical technology. Specifically, the invention provides the application of Buxusemine H and Buxusemine L, a boxwood
alkaloid, in preparing drugs for treating
inflammatory pain,
visceral pain and
neuropathic pain, and in preparing Ca v 3.2 Application in selective inhibitors of
low voltage-gated
calcium channel subtypes. Buxusemine H and Buxusemine L inhibit Ca v 3.2 The activity of
low voltage-gated
calcium channels is prominent, and the response to Ca v 3.2 and Ca v 3.1 The selectivity of
low voltage-gated
calcium channels is 9 and 30 respectively, which is significantly better than the candidate molecule Z944 in clinical trials (in Ca v 3.1 and Ca v 3.2) and the boxwood
alkaloid analog cyclovibrobuxin D (in Ca v 3.1 and Ca v Buxusemine L has no selectivity in Na v 1.7 Na v Buxusemine L has outstanding specificity in
ion channels involved in pain conduction, such as TRPV1, TPRA1, TRPM8, ASIC3, P2X2 and P2X4. At the same time, Buxusemine L can significantly relieve L-
cysteine-induced
inflammatory pain,
acetic acid-induced
visceral pain and
sciatic nerve ligation-induced
neuropathic pain in mice, and its effect is comparable to that of the positive controls Mibefradil and Z944.