【摘 要】
:
目的:探究α-芋螺毒素TxIB对吗啡诱导的小鼠条件性位置偏爱(CPP)的影响,为进一步设计、筛选抗吗啡依赖的芋螺毒素及其类似物提供理论和实验依据。方法:建立小鼠吗啡依赖CPP模型,可分为预处理、训练和测试三个阶段。预处理阶段:将小鼠放置在中间箱,任其自由穿梭,记录15 min内其在各箱停留的时间,淘汰在黑箱时间百分比低于50%的小鼠,以小鼠非偏爱的白箱作为伴药箱进行试验。将符合试验条件的C57小鼠
【机 构】
:
海南大学热带生物资源教育部重点实验室,海口市海洋药物重点实验室,海南海口570228;海南大学农学院,海南海口570228
【出 处】
:
第12届生物毒素研究及医药应用学术大会
论文部分内容阅读
目的:探究α-芋螺毒素TxIB对吗啡诱导的小鼠条件性位置偏爱(CPP)的影响,为进一步设计、筛选抗吗啡依赖的芋螺毒素及其类似物提供理论和实验依据。方法:建立小鼠吗啡依赖CPP模型,可分为预处理、训练和测试三个阶段。预处理阶段:将小鼠放置在中间箱,任其自由穿梭,记录15 min内其在各箱停留的时间,淘汰在黑箱时间百分比低于50%的小鼠,以小鼠非偏爱的白箱作为伴药箱进行试验。将符合试验条件的C57小鼠随机分为生理盐水对照组、吗啡组、吗啡+α-芋螺毒素TxIB低剂量、中剂量、高剂量五组,每组10只。训练阶段:连续5天,早上8:00吗啡组小鼠皮下注射吗啡5 mg/kg,生理盐水对照组小鼠皮下注射同体积的生理盐水,放入伴药箱(白箱),下午16: 00,均皮下注射等体积的生理盐水,放入黑箱,不可自由穿梭,持续时间为45 min,使小鼠产生显著的条件性位置偏爱效应。测试阶段:停止吗啡注射24h后进行CPP测试,在测试前30min,对各组小鼠进行侧脑室注射相应的生理盐水和不同剂量的TxIB,记录15 min内小鼠在伴药箱中停留的时间。结果:吗啡组小鼠相对于生理盐水组小鼠,在伴药箱中停留的时间明显延长,α-芋螺毒素TxIB可减少吗啡组小鼠在伴药箱停留的时间,抑制吗啡诱导小鼠条件性位置偏爱的形成。结论:连续5天皮下注射5 mg/kg吗啡可诱导小鼠产生显著的条件性位置偏爱效应,而α-芋螺毒素TxIB却能抑制吗啡诱导的小鼠条件性位置偏爱效应。
其他文献
The skin of toad Bufo bufo gargarizans Cantor is still used in clinic known as Traditional Chinese Medicine in China nowadays.However, the genomic and natural proteins/peptides information about the s
Aerolysins belong to the bacterial β-pore forming toxin superfamily.Interestingly, a diverse array of proteins harboring an aerolysin domain fused with other domains has been identified in various ani
Hepatitis B virus (HBV) infection significantly increases the risk for the development of chronic active hepatitis, cirrhosis, and primary hepatocellular carcinoma, which is still a major public healt
The structural similarity between the defensins and scorpion neurotoxins suggests might evolve from a common ancestor.However, there is no direct experimental evidence demonstrating functional linkage
As an alternative class of antimicrobial agent to overcome the drug resistant infections,antimicrobial peptides (AMPs) have gained significant attention.Here, we designed and got an improved antimicro
It remains unclear why scorpions are immune to own venoms containing various neurotoxins specific for the mammalian or insect ion channels.The functional characterization of scorpion ion channels can
The human β-defensin 2 (hBD2), as a Kv1.3 channel inhibitor with the unique molecular mechanism and novel immune modulatory function, suggests that human β-defensins are a kind of novel channel ligand
腹孔环胺藻(Azadinium poporum)是氮杂螺环酸(azaspiracid, AZA)毒素的来源藻种之一,在我国近海具有广泛分布.本研究以分离自我国南海的两株腹孔环胺藻(AZDY06和AZFC22)为研究对象,比较了其在不同氮磷营养盐浓度、不同类型氮源(尿素和硝酸钠)和不同培养基(f/2-Si、L1-Si和K-Si)等批次培养条件下的生长与产毒的情况.不同氮磷营养盐浓度的单因子实验是以常
Nematocysts are typical organelles of cnidarian, discharge following proper chemical or mechanical stimulation with the tubules evert, releasing venom for prey and defence.There are many factors thata
芋螺毒素(Conotoxin,CTxs)是由生活在热带海洋中的肉食性软体动物芋螺分泌出来的一种麻醉猎物的小肽类毒素,在镇痛、戒烟戒毒和抗癌等方面具有广阔的应用前景.芋螺毒素的种类繁多,生物活性多样,目前全世界发现的芋螺约有800多种,但由于芋螺的采集费时费力,芋螺资源日渐稀少,建立稀有芋螺毒素基因资源库至关重要,以期长期保存和可持续开发利用.目前,基于PCR的文库筛选方法已经基本替代了传统的杂交筛