工程神经毒素功能化的外体,以有针对性地向外周神经系统输送
Mena Asha Krishnan1,2, Olawale A Alimi1,2, Tianshu Pan1,2
1Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA.
Pharmaceutics
|January 23, 2024
概括
携带毒素-C片段 (TTC) 的红细胞衍生外体 (Exos) 显示了向外围神经点的传递的改善. 这种新型的外体系统增强了对外围神经病变的治疗潜力.
科学领域:
- 生物技术是生物技术.
- 神经科学是一个神经科学.
- 药物运输 药物运输 药物运输
背景情况:
- 由于复杂的解剖学和血神经屏障,外围神经药物输送面临着挑战.
- 红细胞衍生外体 (Exos) 是有前途的生物相容载体,但针对外周神经系统 (PNS) 仍然很困难.
研究的目的:
- 开发一个针对外生体输送系统,用于外周神经组织的前突触终端.
- 用毒素-C片段 (TTC) 设计红细胞 (RBC) 衍生的外体,以增强外围神经向.
主要方法:
- 毒素-C片段 (TTC) 和Cyanine5 (Cy5) 光标签使用生物对等点击化学与红细胞衍生外体结合.
- 在体外研究中使用Neuro-2a神经细胞来评估TTC-外体积累.
- 在体内研究中使用了小鼠模型来追踪肌内注射的TTC外体在坐骨神经组织中.
主要成果:
- 与未经修改的外体相比,TTC结合外体 (TTC-Exos) 在神经元细胞中积累的量显著更高.
- 在体内,在72小时内成功将工程TTC-Exos输送到神经肌肉结点和坐骨神经组织.
- TTC结合对于增强外体的亲和力和向外周神经点的传递至关重要.
结论:
- 设计的TTC-Exos代表了针对外周神经系统提供向治疗的可行策略.
- 这种方法具有巨大的潜力,可以通过克服分娩障碍来治疗外围神经病变.
- 这项研究强调了生物对等化学在创建神经应用的功能化外体的有效性.
相关概念视频
Ligand-Gated Ion Channel Receptor: Gating Mechanism
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
Neurochemical Transmission: Sites of Drug Action
Neurochemical transmission, the conduction of electrical impulses between neurons mediated by neurotransmitters, plays a vital role in various physiological processes. Autonomic drugs exert their effects by modulating neurotransmission within the autonomic nervous system. For instance, drugs such as hemicholinium block the precursor uptake necessary for synthesizing acetylcholine, an essential autonomic neurotransmitter. Following synthesis, neurotransmitters are stored in vesicles. Metyrosine...
Classification of Neurotransmitters
Neurotransmitters play a crucial role in the communication between neurons in the autonomic nervous system. Neurons in the autonomic nervous system can be cholinergic or adrenergic depending on the neurotransmitters synthesized. Cholinergic neurons use acetylcholine as their primary neurotransmitter. This includes all the preganglionic fibers of the sympathetic and pre- and postganglionic fibers of the parasympathetic nervous systems. In addition, neurons of the somatic nervous system also use...
Drugs Affecting Neurotransmitter Release or Uptake
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
Neurotransmitters
Neurotransmitters play a crucial role in the communication between neurons in the autonomic nervous system. Neurons in the autonomic nervous system can be cholinergic or adrenergic depending on the neurotransmitters synthesized. Cholinergic neurons use acetylcholine as their primary neurotransmitter. This includes all the preganglionic fibers of the sympathetic and pre- and postganglionic fibers of the parasympathetic nervous systems. In addition, neurons of the somatic nervous system also use...
Drug Delivery: Parenteral Route
The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...


