Fig. 6

Histological evaluation of the therapeutic potential of MSCs on AIV-induced lung injury in mice. Lung pathology of mice in different experimental groups 3 days post-treatment (hematoxylin and eosin, 100× magnification). a Control group, b MSC group (lungs of control and MSC groups showed a normal aspect), c H9N2 infected mice + physiological saline group, d H9N2 infected mice + McCoy group (diffuse pneumonia and severe alveolar injury were observed), e H9N2 infected mice + MSCs group (MSC transplantation reduced lung injury). f H9N2 infected mice+ Physiological saline administer 1 day following viral infection induction (Severe diffuse pneumonia and extensive alveolar damage). g H9N2 infected mice+MSCs administer 1 day following viral infection induction (MSC transplantation reduced lung inflammation and injury)