概括
德尔塔9-四化甘醇 (Delta9-THC) 损害了黑猩猩的认知表现. 两种测试剂量都显著影响了准确性和速度,在研究期间没有产生耐受性. 药物戒断后没有观察到长期的行为影响.
科学领域:
- 神经科学是一个神经科学.
- 行为药理学行为药理学
- 灵长类动物学 灵长类动物学
背景情况:
- 德尔塔9-四大麻 (Delta9-THC) 是大麻中主要的精神活性成分.
- 了解Delta (9) THC的行为影响和潜在的耐受性发展对于评估其对认知功能的影响至关重要.
研究的目的:
- 为了研究急性和亚慢性Delta的THC给药对黑猩猩认知表现的影响.
- 确定非人类灵长类动物模型中是否会在重复暴露时产生对Delta(9) THC的耐受性.
主要方法:
- 五只黑猩猩接受了21天的1.0毫克/千克和42天的4.0毫克/千克剂量的Delta(9) THC.
- 用延迟匹配到样本任务评估认知表现,测量准确性和速度.
- 在整个研究期间和戒药后进行了行为观察.
主要成果:
- 两剂Delta ((9) THC显著降低了延迟匹配到样本任务的准确性和速度.
- 在治疗期间,没有发现有意义的证据表明Delta ((9) THC对认知干扰效应的耐受性发展.
- 在终止Delta (9) THC的治疗后,没有发现长期的行为变化.
结论:
- 在黑猩猩中,THC显著破坏认知功能,特别是准确性和速度.
- 在测试剂量和持续时间下,重复暴露于Delta (9) THC并没有导致行为耐受性的发展.
- 需要进一步的研究来探索大麻素对灵长类动物认知的长期后果和剂量依赖的影响.
相关概念视频
Mismatch Repair
Overview
Standard Entropy Change for a Reaction
Entropy is a state function, so the standard entropy change for a chemical reaction (ΔS°rxn) can be calculated from the difference in standard entropy between the products and the reactants.
Basicity of Heterocyclic Aromatic Amines
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...


