Use of placental mesenchymal stem cell exosomes in the preparation of a drug for treating pulmonary fibrosis

By identifying placental mesenchymal stem cell-derived exosomes through particle size distribution, surface markers, and specific miRNA combinations, the problems of molecular-level identification and quality control in the development of pulmonary fibrosis drugs have been solved, achieving clear product definition and therapeutic efficacy.

CN122398858APending Publication Date: 2026-07-17THE FIRST AFFILIATED HOSPITAL ZHEJIANG UNIV COLLEGE OF MEDICINE

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE FIRST AFFILIATED HOSPITAL ZHEJIANG UNIV COLLEGE OF MEDICINE
Filing Date
2026-05-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the current technology, the molecular-level identification and product definition of placental mesenchymal stem cell-derived exosomes in the development of pulmonary fibrosis drugs are not clear enough, making it difficult to achieve product consistency and quality control.

Method used

We provide placental mesenchymal stem cell-derived exosomes, which are identified at the molecular level through particle size distribution, surface marker expression, and specific miRNA combinations, and can be used to treat pulmonary fibrosis by combining them with intratracheal administration.

Benefits of technology

This study achieved clear source characteristics and molecular cargo fingerprinting of exosomes, improving product identification and quality control, significantly improving lung tissue pathological damage, and reducing fibrosis-related molecular indicators.

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Abstract

本发明属于生物医药及细胞外囊泡技术领域,涉及胎盘间充质干细胞外泌体在制备治疗肺纤维化药物中的应用。所述外泌体粒径主要分布于30~150 nm,具有典型囊泡形态,并表达CD9、CD63、Hsp70、CD81和TSG101中的一种或多种外泌体标志物。经miRNA检测,所述外泌体同时检出miR‑7975、miR‑7977、miR‑5100、miR‑6089和miR‑1273g‑3p,所述五种miRNA的同时检出作为所述外泌体的分子货载指纹特征。所述外泌体经气管滴注给药后,可改善博来霉素诱导的肺纤维化模型小鼠肺组织病理损伤,并降低纤维化相关分子指标表达水平。
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