Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia
IntroductionPeople with dementia (PwD) often present with neuropsychiatric symptoms (NPS). NPS are of substantial burden to the patients, and current treatment options are unsatisfactory. Investigators searching for novel medications need animal models that present disease-relevant phenotypes and ca...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Psychiatry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpsyt.2023.1054163/full |
| _version_ | 1797901786127794176 |
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| author | Giorgio Bergamini Helene Massinet Aaron Hart Sean Durkin Gabin Pierlot Michel Alexander Steiner |
| author_facet | Giorgio Bergamini Helene Massinet Aaron Hart Sean Durkin Gabin Pierlot Michel Alexander Steiner |
| author_sort | Giorgio Bergamini |
| collection | DOAJ |
| description | IntroductionPeople with dementia (PwD) often present with neuropsychiatric symptoms (NPS). NPS are of substantial burden to the patients, and current treatment options are unsatisfactory. Investigators searching for novel medications need animal models that present disease-relevant phenotypes and can be used for drug screening. The Senescence Accelerated Mouse-Prone 8 (SAMP8) strain shows an accelerated aging phenotype associated with neurodegeneration and cognitive decline. Its behavioural phenotype in relation to NPS has not yet been thoroughly investigated. Physical and verbal aggression in reaction to the external environment (e.g., interaction with the caregiver) is one of the most prevalent and debilitating NPS occurring in PwD. Reactive aggression can be studied in male mice using the Resident-Intruder (R-I) test. SAMP8 mice are known to be more aggressive than the Senescence Accelerated Mouse-Resistant 1 (SAMR1) control strain at specific ages, but the development of the aggressive phenotype over time, is still unknown.MethodsIn our study, we performed a longitudinal, within-subject, assessment of aggressive behaviour of male SAMP8 and SAMR1 mice at 4, 5, 6 and 7 months of age. Aggressive behaviour from video recordings of the R-I sessions was analysed using an in-house developed behaviour recognition software.ResultsSAMP8 mice were more aggressive relative to SAMR1 mice starting at 5 months of age, and the phenotype was still present at 7 months of age. Treatment with risperidone (an antipsychotic frequently used to treat agitation in clinical practice) reduced aggression in both strains. In a three-chamber social interaction test, SAMP8 mice also interacted more fervently with male mice than SAMR1, possibly because of their aggression-seeking phenotype. They did not show any social withdrawal.DiscussionOur data support the notion that SAMP8 mice might be a useful preclinical tool to identify novel treatment options for CNS disorders associated with raised levels of reactive aggression such as dementia. |
| first_indexed | 2024-04-10T09:07:25Z |
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| institution | Directory Open Access Journal |
| issn | 1664-0640 |
| language | English |
| last_indexed | 2024-04-10T09:07:25Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Psychiatry |
| spelling | doaj.art-21b82098baf14fe093e698de1f45b18a2023-02-21T06:25:59ZengFrontiers Media S.A.Frontiers in Psychiatry1664-06402023-02-011410.3389/fpsyt.2023.10541631054163Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementiaGiorgio Bergamini0Helene Massinet1Aaron Hart2Sean Durkin3Gabin Pierlot4Michel Alexander Steiner5CNS Pharmacology and Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandCNS Pharmacology and Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandScientific Computing Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandCNS Pharmacology and Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandScientific Computing Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandCNS Pharmacology and Drug Discovery, Idorsia Pharmaceuticals Ltd., Allschwil, SwitzerlandIntroductionPeople with dementia (PwD) often present with neuropsychiatric symptoms (NPS). NPS are of substantial burden to the patients, and current treatment options are unsatisfactory. Investigators searching for novel medications need animal models that present disease-relevant phenotypes and can be used for drug screening. The Senescence Accelerated Mouse-Prone 8 (SAMP8) strain shows an accelerated aging phenotype associated with neurodegeneration and cognitive decline. Its behavioural phenotype in relation to NPS has not yet been thoroughly investigated. Physical and verbal aggression in reaction to the external environment (e.g., interaction with the caregiver) is one of the most prevalent and debilitating NPS occurring in PwD. Reactive aggression can be studied in male mice using the Resident-Intruder (R-I) test. SAMP8 mice are known to be more aggressive than the Senescence Accelerated Mouse-Resistant 1 (SAMR1) control strain at specific ages, but the development of the aggressive phenotype over time, is still unknown.MethodsIn our study, we performed a longitudinal, within-subject, assessment of aggressive behaviour of male SAMP8 and SAMR1 mice at 4, 5, 6 and 7 months of age. Aggressive behaviour from video recordings of the R-I sessions was analysed using an in-house developed behaviour recognition software.ResultsSAMP8 mice were more aggressive relative to SAMR1 mice starting at 5 months of age, and the phenotype was still present at 7 months of age. Treatment with risperidone (an antipsychotic frequently used to treat agitation in clinical practice) reduced aggression in both strains. In a three-chamber social interaction test, SAMP8 mice also interacted more fervently with male mice than SAMR1, possibly because of their aggression-seeking phenotype. They did not show any social withdrawal.DiscussionOur data support the notion that SAMP8 mice might be a useful preclinical tool to identify novel treatment options for CNS disorders associated with raised levels of reactive aggression such as dementia.https://www.frontiersin.org/articles/10.3389/fpsyt.2023.1054163/fulldementiaagitationaggressionsociabilitySAMP8 micedeep learning |
| spellingShingle | Giorgio Bergamini Helene Massinet Aaron Hart Sean Durkin Gabin Pierlot Michel Alexander Steiner Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia Frontiers in Psychiatry dementia agitation aggression sociability SAMP8 mice deep learning |
| title | Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia |
| title_full | Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia |
| title_fullStr | Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia |
| title_full_unstemmed | Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia |
| title_short | Probing the relevance of the accelerated aging mouse line SAMP8 as a model for certain types of neuropsychiatric symptoms in dementia |
| title_sort | probing the relevance of the accelerated aging mouse line samp8 as a model for certain types of neuropsychiatric symptoms in dementia |
| topic | dementia agitation aggression sociability SAMP8 mice deep learning |
| url | https://www.frontiersin.org/articles/10.3389/fpsyt.2023.1054163/full |
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