رسالة جامعية

環己酮對大鼠神經毒性之探討 ; Study on Neurotoxicity of Cyclohexanone in Rats

التفاصيل البيبلوغرافية
العنوان: 環己酮對大鼠神經毒性之探討 ; Study on Neurotoxicity of Cyclohexanone in Rats
المؤلفون: 陳正中, Chen, Cheng-Chung
المساهمون: 應用化學系碩士班, 劉 炳 嵐, 蔡 三 福, Bing-Lan Liu, San-Fu Tsai
سنة النشر: 2009
المجموعة: Chaoyang University of Technology Institutional Repository (CYUTIR)
مصطلحات موضوعية: 神經毒性, 環己酮, Cyclohexanone, Neurotoxicity
الوصف: 部分未開放全文之論文可透過本校博碩士論文系統於校內網域使用,實際授權情形以該系統為準。 ; 農藥「其他成分」為製作農藥成品中不可缺少之輔助添加物,其作用功能繁多,研究人員對於農藥使用風險性,常常只著重於有效成分評估,卻忽略「其他成分」可能產生之危害。本試驗研究針對可能具爭議性的農藥「其他成分」:環已酮(cyclohexanone)、鄰苯二甲酸二丁酯(dibutyl phthalate)與甲苯(toluene),進行體外神經毒性(neurotoxicity)之測試。結果顯示,環己酮在高濃度(10-5、10-4 M)對乙醯膽鹼酯?(acetylcholinesterase, AChE)及膽鹼乙醯轉化?(choline acetyltransferase, ChAT)具顯著的影響,需進一步進行動物活體試驗,以釐清或瞭解其暴露之潛在風險。體內神經毒性試驗分為有機磷劑組陶斯松(chlorpyrifos)劑量15 mg/kg及試驗組環已酮劑量分別為75、150、300 mg/kg。大鼠以胃管連續餵食12週後,進行AChE、神經傳導物質(neurotransmitter)、相關表現蛋白(α-synuclein及ChAT)、免疫組織化學評估。結果顯示,血清中AChE活性以第4週陶斯松組抑制82%最為顯著,第8週及12週仍然有74%與70%抑制;環已酮組在第4週低劑量組(75 mg/kg)與中劑量組(150 mg/kg)有顯著性抑制分別為51%及36%,但在第8週血清AChE活性呈現恢復,腦均質液AChE活性抑制仍以陶斯松組最為顯著。紋狀體(corpusstriatum)的多巴胺(dopamine)濃度在環已酮組會隨著藥劑濃度增加而增加,高劑量組(300 mg/kg) 有顯著性差異(p< 0.01) , 在血清素(serotonin,5-hydroxytryptamine, 5-HT)濃度方面,陶斯松組與環已酮組,紋狀體及海馬迴(hippocampus)皆有顯著性增加(p< 0.05)。腦部胺基酸類神經傳導物質(aspartate、glutamate、glycine、GABA)濃度與腦部α-synuclein及ChAT表現量均無顯著性差異。另外tyrosine hydroxylase (TH)、glial fibrillary acidicprotein (GFAP)等免疫組織染色亦無發現明顯神經退化情形。綜合上述試驗結果顯示,農藥其他成分環已酮在長時間暴露下可能具有神經毒性,應注意其暴露的潛在風險性。 ; Inert (other) ingredients play a key role in the effectiveness of a pesticideproduct, which may have multi-functions. However, people usually onlyassessed the safety risk of active ingredients in pesticide products, neglectingharmful effects which other ingredients might cause. Firstly, the in vitro studywas conducted to assess the neurotoxicity of cyclohexanone, dibutyl phthalateand toluene which act as other pesticide ingredients. The result showed theactivity of acetylcholinesterase (AChE) and choline acetyltransferase (ChAT) inprimary brain cell culture were elevated by cyclohexanone treatment which maybe neurotoxic. Secondary, the in vivo study was conducted to assess theneurotoxicity of cyclohexanone in rats. Adult, male Spradgue-Dawley rats weretreated with chlorpyrifos (15 mg/kg) and cyclohexanone (75, 150, 300 mg/kg),respectively by the stomach tube continual oral administration for 12 weeks. Byusing neurochemical and immunohistochemical techniques, the ...
نوع الوثيقة: thesis
وصف الملف: 860612 bytes; application/octet-stream
اللغة: Chinese
العلاقة: 097CYUT5500007; http://ir.lib.cyut.edu.tw:8080/handle/310901800/27689Test; http://ir.lib.cyut.edu.tw:8080/bitstream/310901800/27689/1/097CYUT5500007-001.zipTest
الإتاحة: http://ir.lib.cyut.edu.tw:8080/handle/310901800/27689Test
http://ir.lib.cyut.edu.tw:8080/bitstream/310901800/27689/1/097CYUT5500007-001.zipTest
رقم الانضمام: edsbas.99F9FC5F
قاعدة البيانات: BASE