What are the consequences of Methylphenidate exposure for maternally separated rats?
| Autor: | Fatemeh Mohtashami Borzadaran, Naeem Ur Rehman, Vahid Sheibani, Khadijeh Esmaeilpour, Sara Joushi, Mohammad Amin Rajizadeh, Gholamreza Sepehri |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_treatment media_common.quotation_subject Motor Activity 03 medical and health sciences Sex Factors 0302 clinical medicine Developmental Neuroscience mental disorders Threshold of pain Animals Medicine Habituation Saline 030304 developmental biology media_common 0303 health sciences business.industry Methylphenidate Maternal Deprivation Addiction medicine.disease Conditioned place preference Rats Substance abuse Anesthesia Conditioning Operant Central Nervous System Stimulants Female business human activities psychological phenomena and processes 030217 neurology & neurosurgery Tail flick test Developmental Biology medicine.drug |
| Zdroj: | International Journal of Developmental Neuroscience. 80:489-499 |
| ISSN: | 1873-474X 0736-5748 |
| Popis: | Methylphenidate (MPH) abuse is prevalent among youth. Drug abuse results in pain perception. We sought to investigate whether Maternal separation (MS) prone to MPH addiction. The next question was whether MPH abusers with MS differ in pain perception. We investigated the impact of MS on addiction and drug reward as well as pain perception following 5 days of MPH injection in males and females rats. Initially, rats underwent MS protocol of 3 hr daily for 21 days. Conditioned place preference (CPP) test was an attempt to investigate whether MS rats experience more reward with MPH. The protocol consisted of 10 min habituation on Day 1, conditioning on Day 2-Day 6 (5 mg per kg MPH injection in drug compartment and saline in saline compartment with 4 hr gap between injections) and 10 min test on Day 7. Furthermore, using another group, differences in pain perception were investigated after 5 days of daily MPH injection with 5 mg per kg. Sensory pain sensitivity was tested on PND 39 using tail flick and hotplate in MS and control groups with and without MPH exposure. Results indicated that female rats are equally prone to addiction in CPP. On the other hand, MS males experience a higher reward in CPP. In tail flick test, female MS rats exposed to MPH show a lower sensory pain threshold with similar MPH exposure. Experiencing MPH similarly declined hotplate pain perception in MS and controls in the females. Males, on the other hand, did not show any difference in sensory pain tests. According to results one can argue MS is detrimental. MS males experience more reward with MPH, females are equally addiction prone and MS females experience more pain in tail flick. On the other hand pain threshold can decline in hotplate test for both control and MS females that received MPH. |
| Databáze: | OpenAIRE |
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