College of Medicine Nankai University Tianjin 300071 China;
Tianjin Eye Hospital Tianjin 300020 ChinaClinical College of Ophthalmology Tianjin Medical University Tianjin 300020 ChinaOphthalmic Center of Xinjiang Production and Construction Corps Hospital Urumqi 830002 Xinjiang Uygur Autonomous Region China;
Tianjin Eye Hospital Tianjin 300020 ChinaClinical College of Ophthalmology Tianjin Medical University Tianjin 300020 China;
College of Medicine Nankai University Tianjin 300071 ChinaTianjin Eye Hospital Tianjin 300020 ChinaClinical College of Ophthalmology Tianjin Medical University Tianjin 300020 China;
human umbilical cord mesenchymal stem cells; exosomes; diabetic retin opathy; retinal n euro ns; BDNF-TrkB pathway;