Journal
CANCER CELL INTERNATIONAL
Volume 20, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s12935-020-01676-z
Keywords
Plasmacytoid dendritic cells; Intrahepatic cholangiocarcinoma; Treg cells; Prognosis; Recurrence
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Funding
- National Natural Science Foundation of China [81972708, 81773069, 82072681, 82003082]
- National Key R&D Program of China [2018YFA0109400]
- Shanghai RisingStar Program [18QA1401200]
- Municipal Human Resources Development Program for Outstanding Young Talents in Medical and Health Sciences in Shanghai [2018YQ14]
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Background Plasmacytoid dendritic cells (pDCs) are present in various primary and metastatic human neoplasms; however, their clinical significance in intrahepatic cholangiocarcinoma is not clear. Methods To evaluate pDCs' distributions in and around tumors as well as their potential function and predictive value for prognosis in patients undergoing curative resection, we performed immunohistochemistry to examine the expression of pDC marker BDCA2, and CD3, CD4, CD8 and Foxp3 in intratumoral and peritumoral tissues from 359 patients with intrahepatic cholangiocarcinoma and compared with prognostic and clinicopathologic factors. Results Results showed that patients with high numbers of BDCA2(+) pDCs in peritumoral tissues were more likely to have elevated levels of carbohydrate antigen 19-9 and gamma-glutamyl transferase, larger and more tumors, advanced tumor-node-metastasis staging, more vascular/bile duct invasion, and lymphatic metastasis in association with greater chance of recurrence and shorter overall survival. Peritumoral tissues with larger numbers of pDCs also showed increased Foxp3(+) regulatory T cell infiltration, both of which were found to be independent factors for predicting time to recurrence and overall survival. By contrast, patient outcomes were not associated with the presence of intratumoral pDCs. Conclusions Peritumoral pDC infiltration may indicate an immune tolerogenic peritumor microenvironment and can be used to predict a poor prognosis for patients undergoing curative resection for intrahepatic cholangiocarcinoma.
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