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Novel dynamic measures of emetic behavior in musk shrews.
Horn, Charles C; Wang, Hong; Estival, Laureline; Meyers, Kelly; Magnusson, Magnus S.
Afiliação
  • Horn CC; Biobehavioral Medicine in Oncology Program, Univ. Pittsburgh Cancer Institute, Pittsburgh, PA, USA; Dept. Medicine: Div. Gastroenterology, Hepatology, and Nutrition, Univ. Pittsburgh School of Medicine, Pittsburgh, PA, USA; Dept. Anesthesiology, Univ. Pittsburgh School of Medicine, Pittsburgh, PA, USA; Center for Neuroscience, Univ. Pittsburgh, Pittsburgh, PA, USA. Electronic address: chorn@pitt.edu.
Auton Neurosci ; 179(1-2): 60-7, 2013 Dec.
Article em En | MEDLINE | ID: mdl-23953843
The emetic reflex occurs as a pattern of motor responses produced by a network of neurons in the hindbrain. Despite an understanding of the sequence of motor outputs that form an emetic episode (EE), the variability in the dynamics of multiple EEs across time remains a mystery. Many clinical investigations rely on once a day patient recall of total amount of vomiting, and preclinical studies frequently report only the total number of EE per unit time. The aim of the current study was to develop novel temporal measures of emetic activation in a preclinical model. Male and female musk shrews were tested with prototypical emetic stimuli: motion exposure (1 Hz), nicotine (5 mg/kg, sc), and copper sulfate (120 mg/kg, ig). New emetic measures included duration (time from first to last episode), rate, standard deviation of the inter-episode interval (SD-I), and a survival analysis of emetic latency (analyzed with Cox regression). Behavioral patterns associated with emesis were also assessed using statistical temporal pattern (T-pattern) analysis to measure nausea-like behaviors (e.g., immobility). The emetic stimuli produced different levels of total EE number, duration, rate, and SD-I. A typical antiemetic, the neurokinin 1 receptor antagonist CP-99,994, suppressed the number of EEs but was less effective for reducing the duration or prolonging the emetic latency. Overall, the current study shows the use of novel dynamic behavioral measures to more comprehensively assess emesis and the impact of therapies.
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Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Vômito / Modelos Animais de Doenças Limite: Animals Idioma: En Revista: Auton Neurosci Assunto da revista: NEUROLOGIA Ano de publicação: 2013 Tipo de documento: Article

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Vômito / Modelos Animais de Doenças Limite: Animals Idioma: En Revista: Auton Neurosci Assunto da revista: NEUROLOGIA Ano de publicação: 2013 Tipo de documento: Article