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Yıl:2003; Cilt: 4; Sayı: 2>> Özet
TAM METİN
Bağımlılık Dergisi; 2003;4(2):62-66
Farelerde bireysel lokomotor aktivite farklılığının nikotin duyarlılaşmasına etkileri
H Kayır, T Çelik
GATA Tıp Fak. Tıbbi Farmakoloji A.D. Deneysel Psikofarmakoloji Araştırma Ünitesi
Amaç: Bu çalışmada, farelerin lokomotor aktivitesindeki (LMA) bireysel farklılığın tekrarlı nikotin uygulanması ile oluşturulan nikotin duyarlılaşmasına etkisi incelenmiştir.

Yöntem: Çalışmanın başlangıcında, dişi Swiss- Webster farelere dört gün süre ile her gün salin uygulandı ve hemen LMA kafesi içine bırakılarak 30 dakika LMA’ları kaydedildi. Fareler 4. gündeki aktivite değerlerine göre düşük ve yüksek LMA’lı gruplara ayrıldı. Alışma işleminden sonra, ayrılan hayvanlarda duyarlılaşma oluşturmak için 19 gün süre ile iki günde bir nikotin (0.5-2 mg/kg) ve salin (kontrol) intra- peritoneal yoldan uygulandı. Aynı işlemler ayrım yapılmamış gruplara da uygulandı.

Bulgular: Lokomotor duyarlılaşma gelişimi, yüksek yada düşük LMA ayrımı yapılmayan ve yapılan gruplarda ayrı ayrı test edildi. Yüksek doz nikotin (2 mg/kg) tüm gruplarda (düşük ve yüksek LMA’lı ve ayrım yapılmayan gruplar) duyarlılaşma oluşturdu. Düşük doz nikotin (1 mg/kg) ise sadece düşük LMA’lı gruplarda duyarlılaşma oluşturdu, diğer gruplarda oluşturmadı.

Sonuç: Farelerde bireysel LMA farklılıkları nikotine lokomotor duyarlılaşma gelişiminde önemli bir faktör olabilir. Düşük LMA’lı farelerde nikotine duyarlılaşma ve nikotin bağımlılığı daha kolay gelişebilir.
The Effects of Individual Locomotor Activity Difference on the Nicotine Sensitization in Mice
Objective: In this study the effects of individual differences in the locomotor activity (LMA) of mice on the development of nicotine-induced sensitization developed by repeated nicotine treatment was investigated.

Method: At the beginning of the study, female Swiss –Webster mice were treated with saline for 4 days, daily. They placed into the LMA cages and their LMAs re- corded for 30 min immediately after treatment. Mice were separated into groups with low LMA or high LMA, according to their activity scores on the 4th day. After habituation pro- cess, separated animals were treated with nicotine (0.5, 1 and 2 mg/kg, ip.) or saline, every second day for 19 days, to produce sensitization. The same procedure was also applied to the non-separated groups of mice.

Results: The development of locomotor sensi- tization was tested separately in mice with low LMA and high LMA, and non-separated mice. High nicotine dose (2 mg/kg) was produced locomotor sensitization in all groups (low LMA, high LMA and non-separated groups). Low dose of nicotine (1 mg/kg) produced locomotor sensitization only in groups with low LMA.

Conclusion: Individual LMA differences in mice may be an important factor in the development of nicotine- induced locomotor sensitization. Nicotine-induced sensitization or dependence can be developed easier in mice with low LMA than mice with high LMA.

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