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Evaluating the effect of R-Baclofen and LP-211 on autistic behavior of the BTBR and Fmr1 -KO mouse models.
INTRODUCTION: Autism spectrum disorder (ASD) is a persistent neurodevelopmental condition characterized by two core behavioral symptoms: impaired social communication and interaction, as well as stereotypic, repetitive behavior. No distinct cause of ASD is known so far; however, excitatory/inhibitory imbalance and a disturbed serotoninergic transmission have been identified as prominent candidates responsible for ASD etiology.
METHODS: The GABA B receptor agonist R-Baclofen and the selective agonist for the 5HT7 serotonin receptor LP-211 have been reported to correct social deficits and repetitive behaviors in mouse models of ASD. To evaluate the efficacy of these compounds in more details, we treated BTBR T+ Itpr3 tf /J and B6.129P2- Fmr1 tm 1 Cgr / J mice acutely with R-Baclofen or LP-211 and evaluated the behavior of animals in a series of tests.
RESULTS: BTBR mice showed motor deficits, elevated anxiety, and highly repetitive behavior of self-grooming. Fmr1 -KO mice exhibited decreased anxiety and hyperactivity. Additionally, Fmr1 -KO mice's ultrasonic vocalizations were impaired suggesting a reduced social interest and communication of this strain. Acute LP-211 administration did not affect the behavioral abnormalities observed in BTBR mice but improved repetitive behavior in Fmr1 -KO mice and showed a trend to change anxiety of this strain. Acute R-Baclofen treatment improved repetitive behavior only in Fmr1 -KO mice.
CONCLUSION: Our results add value to the current available data on these mouse models and the respective compounds. Yet, additional studies are needed to further test R-Baclofen and LP-211 as potential treatments for ASD therapy.
METHODS: The GABA B receptor agonist R-Baclofen and the selective agonist for the 5HT7 serotonin receptor LP-211 have been reported to correct social deficits and repetitive behaviors in mouse models of ASD. To evaluate the efficacy of these compounds in more details, we treated BTBR T+ Itpr3 tf /J and B6.129P2- Fmr1 tm 1 Cgr / J mice acutely with R-Baclofen or LP-211 and evaluated the behavior of animals in a series of tests.
RESULTS: BTBR mice showed motor deficits, elevated anxiety, and highly repetitive behavior of self-grooming. Fmr1 -KO mice exhibited decreased anxiety and hyperactivity. Additionally, Fmr1 -KO mice's ultrasonic vocalizations were impaired suggesting a reduced social interest and communication of this strain. Acute LP-211 administration did not affect the behavioral abnormalities observed in BTBR mice but improved repetitive behavior in Fmr1 -KO mice and showed a trend to change anxiety of this strain. Acute R-Baclofen treatment improved repetitive behavior only in Fmr1 -KO mice.
CONCLUSION: Our results add value to the current available data on these mouse models and the respective compounds. Yet, additional studies are needed to further test R-Baclofen and LP-211 as potential treatments for ASD therapy.
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