BACKGROUND: Patients with schizophrenia show a significantly higher frequency of hyperbilirubinemia than patients suffering from other psychiatric disorders and the general healthy population. We examined the hyperbilirubinemia on behavioral and neuropathological changes in rats as a possible animal model of schizophrenia. METHODS: Gunn rats with severe hyperbilirubinemia (j/j), Gunn rats without severe hyperbilirubinemia (+/j), and Wistar rats were examined by open-field, social interaction, and prepulse inhibition tests. TUNEL, AgNOR and Ki-67 were also assayed on paraffin-embedded brain sections of these rats. RESULTS: Compared to Wistar rats, both Gunn j/j and +/j rats showed hyperlocomotion, high sniffing scores, and low defecation scores. They showed significantly more aggressive behaviors and impaired prepulse inhibition. The numbers of Ki-67-labeled cells and AgNOR were lower and the number of TUNEL-positive cells was higher than that of Wistar rats. CONCLUSIONS: These results might support the neurodevelopmental hypothesis of schizophrenia. Both Gunn j/j and +/j rats may be a useful animal model and provide clues to the role of hyperbilirubinemia in schizophrenia.
BACKGROUND:Patients with schizophrenia show a significantly higher frequency of hyperbilirubinemia than patients suffering from other psychiatric disorders and the general healthy population. We examined the hyperbilirubinemia on behavioral and neuropathological changes in rats as a possible animal model of schizophrenia. METHODS:Gunn rats with severe hyperbilirubinemia (j/j), Gunn rats without severe hyperbilirubinemia (+/j), and Wistar rats were examined by open-field, social interaction, and prepulse inhibition tests. TUNEL, AgNOR and Ki-67 were also assayed on paraffin-embedded brain sections of these rats. RESULTS: Compared to Wistar rats, both Gunn j/j and +/j rats showed hyperlocomotion, high sniffing scores, and low defecation scores. They showed significantly more aggressive behaviors and impaired prepulse inhibition. The numbers of Ki-67-labeled cells and AgNOR were lower and the number of TUNEL-positive cells was higher than that of Wistar rats. CONCLUSIONS: These results might support the neurodevelopmental hypothesis of schizophrenia. Both Gunn j/j and +/j rats may be a useful animal model and provide clues to the role of hyperbilirubinemia in schizophrenia.
Authors: Marta Krzyżanowska; Johann Steiner; Dorota Pieśniak; Karol Karnecki; Michał Kaliszan; Marek Wiergowski; Krzysztof Rębała; Ralf Brisch; Katharina Braun; Zbigniew Jankowski; Monika Kosmowska; Joanna Chociej; Tomasz Gos Journal: Eur Arch Psychiatry Clin Neurosci Date: 2019-03-11 Impact factor: 5.270
Authors: Marta Krzyżanowska; Johann Steiner; Ralf Brisch; Christian Mawrin; Stefan Busse; Katharina Braun; Zbigniew Jankowski; Hans-Gert Bernstein; Bernhard Bogerts; Tomasz Gos Journal: Eur Arch Psychiatry Clin Neurosci Date: 2014-08-05 Impact factor: 5.270
Authors: Marta Krzyżanowska; Johann Steiner; Karol Karnecki; Michał Kaliszan; Ralf Brisch; Marek Wiergowski; Katharina Braun; Zbigniew Jankowski; Tomasz Gos Journal: Eur Arch Psychiatry Clin Neurosci Date: 2015-11-21 Impact factor: 5.270