title: Blood biochemical changes in mice after administration of a mixture of three anesthetic agents.
abstract: Currently, from the viewpoint of animal welfare, anesthesia or analgesia is required during experimental procedures in animals that are likely to cause pain. A part of these anesthetics have been reported to influence a blood biochemical level. It is important for us to understand the effect of the anesthetic on blood biochemistry when we choose the anesthetic agent to be used in experiments. In this study, we examined the blood biochemical changes in mice after administration of a new mixture of three anesthetic agents -medetomidine / midazolam / butorphanol (MMB). We subcutaneously administered two dose combinations of MMB (0.45 / 6 / 7.5 and 0.9 / 12 / 15 mg/kg) in mice, followed by administration of atipamezole, for reversal of anesthetic effects, after 1 hr. Thereafter, blood biochemistry was assessed at 1, 4 and 24 hr after MMB administration. We observed that MMB administration caused a transient increase in blood sugar, inorganic phosphorus, potassium and creatine kinase levels. These, however, returned to the reference range 24 hr after MMB administration. In conclusion, MMB changes the levels of some blood biochemical parameters, but not to an extent that would threaten health. However, when using laboratory animals, this effect of MMB may influence the experimental results, depending on the experimental content. Hence, the choice of anesthetic agents used in laboratory animals should be based on detailed knowledge of their pharmacological effects.
authors.affiliation: Chugai Research Institute for Medical Science, Inc., 1-135 Komakado, Gotemba, Shizuoka 421-8513, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Ochiai
authors.forename: Hidetomo
authors.initials: H
authors.lastname: Iwano
authors.forename: Takako
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Manabu
authors.initials: M
authors.lastname: Hirabayashi
authors.forename: Eiji
authors.initials: E
authors.lastname: Kaneko
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Watanabe
authors.forename: Kazuto
authors.initials: K
authors.lastname: Yamashita
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yokota
mesh_terms: D000758:Anesthesia / Q000662:veterinary; D019162:Anesthetics, Combined / Q000008:administration & dosage / Q000494:pharmacology*; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D002077:Butorphanol / Q000008:administration & dosage / Q000494:pharmacology*; D003402:Creatine Kinase / Q000097:blood; D008297:Male; D020926:Medetomidine / Q000008:administration & dosage / Q000494:pharmacology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008874:Midazolam / Q000008:administration & dosage / Q000494:pharmacology*; D010758:Phosphorus / Q000097:blood; D011188:Potassium / Q000097:blood
chemical_list: D019162:Anesthetics, Combined; D001786:Blood Glucose; D010758:Phosphorus; D003402:Creatine Kinase; D020926:Medetomidine; D002077:Butorphanol; D008874:Midazolam; D011188:Potassium