Abstract
To determine whether the paracrine secretion of interferon-γ (IFN-γ) can efficiently stimulate the resistance to Mycobacterium avium complex (MAC) infection, 3T3 fibroblasts were stably transduced to secrete IFN-γ (500 units/106 cells/48 h) and their effects on MAC infection were investigated in genetically susceptible BALB/c mice, compared with that of free recombinant IFN-γ (rIFN-γ). Immunization with IFN-γ-secreting fibroblasts (3T3-IFN-γ) during intranasal infection with MAC resulted in a significant decrease in bacterial load of lung during the entire 8-week observation period, while rIFN-γ reduced the bacterial load at initial 1 week but not by 8 weeks postinfection. Furthermore, immunization with the 3T3-IFN-γ cells induced and maintained significantly higher levels of cytotoxic activity and nitric oxide production by lung cells than those of rIFN-γ immunization. This work suggest that IFN-γ-secreting fibroblasts may serve as a vehicle for paracrine secretion of IFN-γ in immunotherapy of MAC infection.
| Original language | English |
|---|---|
| Pages (from-to) | 1067-1073 |
| Number of pages | 7 |
| Journal | Vaccine |
| Volume | 18 |
| Issue number | 11-12 |
| DOIs | |
| Publication status | Published - 2000 Jan 6 |
| Externally published | Yes |
Bibliographical note
Funding Information:We would like to thank Dr. A, Bank, Dr. R. Mulligan, Dr. P. Gangadharam for providing valuable reagents. This work was supported by grants from the Korea Science and Engineering Foundation (IRC project to T.S.K.).
Keywords
- IFN-γ-secreting fibroblast
- Immunity
- MAC
ASJC Scopus subject areas
- Molecular Medicine
- General Immunology and Microbiology
- General Veterinary
- Public Health, Environmental and Occupational Health
- Infectious Diseases