In vivo production of tumour necrosis factor-α and interleukin-6 in BALB/c mice inoculated intranasally with a high dose of respiratory syncytial virus
✍ Scribed by P. J. Hayes; R. Scott; J. Wheeler
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 716 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0146-6615
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Intranasal administration of an inoculum of 10^7^ focus‐forming units (FFU) of respiratory syncy‐tial (RS) virus induced disease in BALB/c mice with signs of anorexia, cachexia, ruffled fur, and pneumonia. Mice displayed mild signs of illness on day 1 postinoculation (PI), followed by a transient recovery phase of 3 days. Disease rapidly reappeared on day 5 PI and worsened on subsequent days, with mortalities by day 7 PI. Mice inoculated with 5 × 10^6^ FFU exhibited milder signs of disease, while those inoculated with 2 × 10^6^ FFU and control mice given only Hep‐2c cell suspension exhibited no noticeable signs of illness. High levels of bioactive tumour necrosis factor‐a (TNF‐a) and interleukin‐6 (IL‐6) were detected in both lungs and sera of mice inoculated with 10^7^ FFU of virus. Peak levels of both cyto‐kines were detected at day 1 PI but remained detectable throughout the 7 day period studied postinoculation. Cytokine levels were much lower or were undetectable in control mice. These results suggest that the macrophage is stimulated in vivo to produce inflammatory cy‐tokines in response to RS virus infection. © 1994 Wiley‐Liss, Inc.