Inhibitory effect of melatonin on lung oxidative stress induced by respiratory syncytial virus infection in mice.
Level 5 - mechanism / opinion, no new human data
Non-clinical animal research in mice
PubMed 20070490 · doi:10.1111/j.1600-079X.2009.00733.x
What was done
Mice were inoculated intranasally with respiratory syncytial virus (RSV) and treated with melatonin for 4 days. Investigators evaluated lung tissue homogenates via spectrophotometry for malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), and nitric oxide (NO). Hydroxyl radical levels were measured using the Fenton reaction, and serum tumor necrosis factor-alpha (TNF-a) concentrations were determined by ELISA.
What was found
The abstract reports directional changes without numeric values. RSV infection increased NO, MDA, and hydroxyl radical levels while decreasing GSH and SOD activities in lung tissue. Melatonin administration significantly reversed all of these changes and reduced serum TNF-a concentrations in infected mice.
Why it matters
This study provides mechanistic preclinical evidence that melatonin can mitigate pulmonary oxidative stress and systemic inflammatory signaling associated with RSV infection.
Limits
The investigation was restricted to a murine model, and the abstract omits sample sizes, specific melatonin dosages, and exact quantitative measurements or variance. Human clinical efficacy and safety cannot be determined from these findings.
Cited by
- supports Melatonin ameliorates respiratory syncytial virus (RSV)-induced lung inflammatory injury in mice by inhibiting oxidative stress and pro-inflammatory cytokine production.