Multisensory Stimulation Improves Cognition and Behavior in Adult Male Rats Born to LT4-treated Thyroidectomized Dams
Alice Batistuzzo1, Guilherme G de Almeida1, Tayna S Brás1
1Developmental Disorders Program, Center for Biological Sciences and Health, Mackenzie Presbyterian University, Sao Paulo SP 01302-907, Brazil.
Endocrinology
|August 1, 2022
Summary
Multisensory stimulation (MS) improved cognitive and mood impairments in rats born to mothers with gestational hypothyroidism. This intervention reversed short-term memory deficits and anxiety, offering a potential therapeutic avenue.
Area of Science:
- Neuroscience
- Endocrinology
- Developmental Biology
Background:
- Gestational hypothyroidism can negatively impact offspring development, cognition, and mood.
- Suboptimal treatment of maternal hypothyroidism may lead to lasting neurodevelopmental deficits in offspring.
- Multisensory stimulation (MS) is explored as a potential intervention for developmental impairments.
Purpose of the Study:
- To investigate the efficacy of multisensory stimulation (MS) in ameliorating the phenotypic consequences of gestational hypothyroidism in rat offspring.
- To assess the impact of MS on locomotor activity, cognitive functions (short- and long-term memory), and mood-related behaviors.
Main Methods:
- Female Wistar rats underwent surgical thyroidectomy and received suboptimal levothyroxine (LT4) treatment, inducing moderate gestational hypothyroidism.
- Offspring from these dams were exposed to a structured multisensory stimulation (MS) regimen for 8 weeks, starting at 60 days of age.
- Standardized behavioral tests were employed to evaluate locomotor activity, memory, and mood before and after MS intervention.
Main Results:
- Gestational hypothyroidism led to reduced litter size, increased mortality, delayed physical development, impaired short- and long-term memory, and anxiety/depressive-like behaviors.
- MS significantly restored short-term memory and reduced anxiety-like behaviors in the offspring.
- MS also improved depressive-like behaviors but did not enhance long-term memory or affect parameters in control offspring.
Conclusions:
- Multisensory stimulation (MS) effectively reversed or minimized cognitive and mood impairments resulting from moderate gestational hypothyroidism in rats.
- The findings suggest MS as a promising non-pharmacological intervention for neurodevelopmental deficits associated with maternal thyroid dysfunction.
- Further research is warranted to elucidate the underlying molecular mechanisms driving the beneficial effects of MS.
