title: Battery of behavioral tests in mice to study postoperative delirium.
abstract: Postoperative delirium is associated with increased morbidity, mortality and cost. However, its neuropathogenesis remains largely unknown, partially owing to lack of animal model(s). We therefore set out to employ a battery of behavior tests, including natural and learned behavior, in mice to determine the effects of laparotomy under isoflurane anesthesia (Anesthesia/Surgery) on these behaviors. The mice were tested at 24 hours before and at 6, 9 and 24 hours after the Anesthesia/Surgery. Composite Z scores were calculated. Cyclosporine A, an inhibitor of mitochondria permeability transient pore, was used to determine potential mitochondria-associated mechanisms of these behavioral changes. Anesthesia/Surgery selectively impaired behaviors, including latency to eat food in buried food test, freezing time and time spent in the center in open field test, and entries and duration in the novel arm of Y maze test, with acute onset and various timecourse. The composite Z scores quantitatively demonstrated the Anesthesia/Surgery-induced behavior impairment in mice. Cyclosporine A selectively ameliorated the Anesthesia/Surgery-induced reduction in ATP levels, the increases in latency to eat food, and the decreases in entries in the novel arm. These findings suggest that we could use a battery of behavior tests to establish a mouse model to study postoperative delirium.
authors.affiliation: Department of Anesthesia, Zhongnan Hospital of Wuhan University, Wuhan, 430071, P. R. China.|Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Mian
authors.initials: M
authors.lastname: Peng
authors.affiliation: Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129-2060, USA.|Department of Anesthesia, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130033, P. R. China.
authors.forename: Ce
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Yuanlin
authors.initials: Y
authors.lastname: Dong
authors.affiliation: Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Yiying
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Shriners Hospitals for Children and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Harumasa
authors.initials: H
authors.lastname: Nakazawa
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Shriners Hospitals for Children and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Masao
authors.initials: M
authors.lastname: Kaneki
authors.affiliation: Massachusetts General Hospital Biostatistics Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Department of Psychiatry, Tenth People's Hospital of Tongji University, Shanghai, 200072, P. R. China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Shen
authors.affiliation: Divisions of General Medicine and Primary Care and Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215.
authors.forename: Edward R
authors.initials: ER
authors.lastname: Marcantonio
authors.affiliation: Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129-2060, USA.
authors.forename: Zhongcong
authors.initials: Z
authors.lastname: Xie
mesh_terms: D018685:Anesthetics, Inhalation / Q000009:adverse effects*; D000818:Animals; D000067290:Behavior Rating Scale; D001522:Behavior, Animal / Q000187:drug effects; D003693:Delirium / Q000139:chemically induced / Q000503:physiopathology*; D006801:Humans; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology*; D008568:Memory / Q000187:drug effects; D051379:Mice; D011183:Postoperative Complications / Q000139:chemically induced / Q000503:physiopathology*
chemical_list: D018685:Anesthetics, Inhalation