See:
Protein tyrosine phosphatase 1B deficiency or inhibition delays ErbB2-induced mammary tumorigenesis and protects from lung metastasis.
http://www.ncbi.nlm.nih.gov/entrez/q...=pubmed_docsum
and
Protein-tyrosine phosphatase 1B is required for HER2/Neu-induced breast cancer.
http://www.ncbi.nlm.nih.gov/entrez/q..._uids=17347513
I could only find diabetes trials for two inhibitors, ISIS-113715 and Ertiprotafib. I am sure that Lani knows of more! Of course, the nice thing is that these have already been through the time consuming phase I trials.
A computer buddy of mine has just been diagnosed with lung mets, even though she had herceptin after chemo, so it's good to know that there is a lead in this area.