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目的:考察125I-(a-cobratoxin,Nt)透鼻黏膜吸收的情况及冰片的促进作用。方法:以大鼠、家兔、狗和羊为研究对象,以放射性活性(每分钟计数,count per minute,cpm)为指标,采用离体渗透鼻黏膜实验、在体渗透鼻黏膜重循环实验等方法,研究125I-Nt对不同动物透鼻黏膜吸收的情况及冰片的促进作用。结果:研究发现,Nt很难透过鼻黏膜吸收,但在冰片作用下吸收显著增加。结论:冰片对Nt透鼻黏膜吸收有显著促进作用。
Objective: To investigate the absorption of 125I-(a-cobratoxin,Nt) through the nasal mucosa and the promoting effect of borneol. METHODS: Rats, rabbits, dogs and sheep were selected as subjects, and radioactivity (count per minute, cpm) was used as an indicator. In vitro osmotic nasal mucosa test, in vivo osmotic nasal mucosa recirculation test, etc. were used. Methods: The effects of 125I-Nt on nasal absorption of different animals and the promoting effect of borneol were studied. Results: The study found that Nt is difficult to absorb through the nasal mucosa, but the absorption is significantly increased under the effect of borneol. Conclusion: Borneol can significantly promote the absorption of Nt through the nasal mucosa.