Analysis of infantile fibrosarcoma reveals extensive T-cell responses within tumors: Implications for immunotherapy.

Zhu H, Gu S, Yin M, Shi M, Xin C, Zhu J, Wang J, Huang S, Xie C, Ma J, Pan C, Tang J, Xu M, Bai XF
Pediatr Blood Cancer 65 02/01/2018

Abstract

BACKGROUND: Infantile fibrosarcoma (IFS) is a rare pediatric malignancy with relatively good prognosis, but the risk of progression or recurrence after therapy exists. To understand the immune microenvironment of IFS and determine if immunotherapy is a potential treatment, we analyzed T-cell responses in IFS tumors.

PROCEDURE: IFS tumors were analyzed by immunohistochemistry and multicolor flow cytometry to characterize immune cell infiltration and function. Tumor infiltrating lymphocytes (TILs) were expanded in vitro and evaluated for recognition of autologous tumor cells. Real-time PCR was applied to evaluate tumor expression of chemokines/cytokines and tumor antigens.

RESULTS: Significant infiltration of both CD4

CONCLUSIONS: IFS tumors are highly immunogenic and expansion of TILs followed by adoptive cell transfer could be a potential immunotherapy for IFS patients undergoing tumor recurrence.

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