POSTN and non-small cell lung carcinoma: We showed that cocultivation of NSCLC cells with CM of DIPF increased proliferation of NSCLC cells, and these effects were attenuated by periostin-neutralizing antibodies as well as by knockdown of ITB3, a subunit of the periostin receptor, indicating that periostin secreted from DIPF promoted tumorigenesis of NSCLC cells.