38
Participants
Start Date
November 1, 2025
Primary Completion Date
June 30, 2027
Study Completion Date
August 31, 2027
Human umbilical cord mesenchymal stem cell derived exosomes
Nasal spray of hUC-MSC-Exo (low dose: 2.5×10\^10 particles, mid-dose: 5.0×10\^10 particles, high-dose: 1.0×10\^11 particles), once per day for 7 days, then once per week for 3 weeks
Placebo Control
Nasal spray of placebo control, once per day for 7 days, then once per week for 3 weeks
Collaborators (1)
ECHO Biotech
UNKNOWN
Xuanwu Hospital, Beijing
OTHER