用于制备球状核酸和角膜染色的角膜-SELEX衍生DNA吸收剂
Xiaohan Zhang1, Ka-Ying Wong1,2, Xinyuan Mu1
1Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada. liujw@uwaterloo.ca.
Nanoscale
|December 9, 2025
概括
通过增强角膜结合和保留,Aptamer功能化黄金纳米粒子 (AuNPs) 通过增强角膜结合和保留来改善眼部药物输送. 角膜-S5胺-金纳米颗粒结合体显示出有望用于眼睛的向输送和诊断.
科学领域:
- 生物技术是生物技术.
- 纳米技术 纳米技术
- 眼科医生 眼科 眼科
背景情况:
- 局部眼滴由于生物可用性差,其治疗效果有限.
- 快速的撕裂清除和角膜障碍物阻碍了药物的吸收.
- 胺剂为向的眼部输送和延长药物保留提供了潜在的潜力.
研究的目的:
- 开发阿帕特默功能化黄金纳米粒子 (AuNPs),用于增强眼部药物输送.
- 为了研究这些阿普坦-AuNP结合物 (球形核酸,SNA) 对角膜组织和细胞的结合能力.
- 为了确定针对眼部应用的最佳吸收体.
主要方法:
- 选择和合成六个具有多氨酸尾巴的体.
- 金纳米颗粒 (AuNPs) 与体的功能化,通过热蒸发形成球形核酸 (SNA).
- 对猪角膜组织和人类角膜上皮细胞 (HCECs) 的SNA体稳定性和结合亲和力的评估.
- 流细胞测量以确定表现最好的SNA的解离常数 (Kd).
主要成果:
- 亚胺-角膜-S5功能化的AuNP (SNA) 显示出优异的体稳定性.
- 角膜-S5 SNAs对角膜组织和HCECs都表现出最佳的结合.
- 观察到有痕的角膜区域的特定染色.
- 角膜-S5与HCEC的分离常数 (Kd) 确定为169nM.
结论:
- 阿普塔默-AuNP合物,特别是SNAs,显示出针对眼部药物输送的显著潜力.
- 角膜-S5胺-AuNP结合物提供了增强的角膜结合和保留,提高治疗效果.
- 这些阿普坦-AuNP结合物对眼部药物输送和诊断应用都很有前途.
相关概念视频
03:31Labeling DNA Probes
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
02:57Southern Blot
Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...