In contrast, the positivity of c-erbB-2 staining in intrahepatic cholangiocarcinoma was significantly higher in cases with lymph node metastasis than in cases without.
Also, the serum HER2 level was significantly higher in bone metastatic cancer patients (14.3 +/- 6.3 ng/mL) than in non-metastatic patients (T2: 11.9 +/- 2.3 ng/mL, P = 0.003; T3: 12.2 +/- 2.8 ng/mL, P = 0.011).
In subgroup with lymph node metastases who exhibit HER-2/neu overexpression might constitute potential candidates for new adjuvant therapy, such as humanized monoclonal antibodies.
In conclusion, our results indicate that expression of c-erbB-2 and p53 did not have any prognostic value in patients with early-stage breast cancer in which axillary lymph node metastasis is absent.
This study suggested that 42.5% of patients with invasive bladder cancer may benefit from molecular-targeted therapy targeting HER-2, and that the efficacy of molecular-targeted therapy can be expected even for patients with lymph node metastases as long as their primary tumors are HER-2 positive.
Taken together, these results suggest that cellular PTPN13 inhibits Her2 activity by dephosphorylating the signal domain of Her2 and plays a role in attenuating invasiveness and metastasis of Her2 overactive tumors.