- Aberrant mucosal mast cell protease expression in the enteric epithelium of nematode-infected mice lacking the integrin alphavbeta6, a transforming growth factor-beta1 activator. Knight, P.A., Brown, J.K., Wright, S.H., Thornton, E.M., Pate, J.A., Miller, H.R. Am. J. Pathol. (2007)