从低氧预先条件的肌肉衍生干细胞的外基因组增强无细胞体洞腔血管新生和生殖功能恢复
Tianwen Peng1, Muyuan Chai2, Zhicong Chen1
1Department of Obstetrics and Gynecology, Center of Reproductive Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory Maternal-Fetal Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, P. R. China.
Advanced healthcare materials
|July 15, 2024
概括
用肌肉干细胞衍生的外体细胞修改的无细胞水凝支架有效地再生阴茎组织. 缺氧增强的外体促进血管形成,恢复勃起功能,使子成功繁殖.
科学领域:
- 再生医学是一种再生医学.
- 生物材料科学 生物材料科学
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
背景情况:
- 阴茎腔体缺陷需要微血管重建以进行有效的组织工程.
- 用于组织再生的干细胞疗法面临着免疫排斥和生物安全问题等挑战.
- 使用外体的非细胞方法提供了一个有希望的替代方案,以避免与干细胞相关的问题.
研究的目的:
- 使用修改后的水凝支架,开发用于阴茎缺陷的非细胞组织再生策略.
- 研究肌肉衍生干细胞 (MDSC) 外体,特别是缺氧预先条件外体 (H-Exos) 在增强血管化的有效性.
- 为了评估阴茎洞体缺陷的功能恢复,用外体荷载支架治疗.
主要方法:
- 用3D打印的GelMA水凝支架被修改为epigallocatechin gallate (EGCG),以获得更好的性能.
- 肌肉衍生干细胞 (MDSC) 在缺氧条件下培养,以获得缺氧预先条件的外体细胞 (H-Exos).
- 对外体 (N-Exos和H-Exos) 进行了表征,并评估了它们对人类静脉内皮细胞 (HUVECs) 的影响. miRNA测序确定了H-Exos中的miR-21-5p上调.
- 装有外体体的EGCG-GelMA支架植入子阴茎体洞缺陷的修复,随后进行成像和功能评估.
主要成果:
- 低氧条件外体 (H-Exos) 与正常外体 (N-Exos) 相比,显著增强了HUVEC的增殖,迁移和毛细血管状管的形成.
- 高通量测序揭示了H-Exos中的miR-21-5p上调,发现通过miR-21-5p/PDCD4通路促进HUVEC增殖.
- 植入装有外体的EGCG-GelMA支架成功地修复了子的阴茎缺陷,恢复了血液流动和勃起功能,导致成功的繁殖.
结论:
- 无细胞水凝支架包含缺氧预先条件外体,是阴茎组织再生的可行策略.
- 该miR-21-5p/PDCD4通路在外体介导血管化中发挥着至关重要的作用.
- 这种方法为阴茎洞体缺陷提供了安全有效的治疗方法,恢复功能和生殖能力.
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