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• W2247018674 abstract "We aim to investigate the impact of acute-phase small-for-size graft injury on mobilization of circulating regulating B cells (Bregs) in HCC patients after liver transplantation and to explore the molecular mechanism therein. Methods From May 2000 to November 2009, 115 HCC recipients were included. The intragraft gene expression profile and Bregs infiltration of the grafts greater (Group 1) and less than 60% (Group 2) of standard liver weight (SLW) were detected by RT-PCR and immunostaining. Circulating Bregs (CD19+CD24hiCD38hi) were compared by FACS analysis after transplantation. Clinical-pathological data including the incidence of tumor recurrence and metastasis were compared. The direct roles of TLR4, CXCL10 and CXCR3 on circulating Bregs mobilization were investigated in TLR4-/-, CXCL10-/- and CXCR3-/- mice models, respectively. The association of intragraft Bregs infiltration and tumor invasiveness were also examined in a rat liver transplantation for liver cancer model. The role of Bregs on liver tumor growth and invasiveness were further studied in a series of in vitro and in vivo functional experiments. Results The patients were grouped into Group 1 (> = 60% SLW, n = 37) and Group 2 ( Bregs infiltration at early phase after transplantation correlated with late phase invasive tumor growth. Levels of circulating Bregs were significantly lower in the mice model with major hepatectomy and hepatic I/R injury using TLR4-/-, CXCL10-/- and CXCR3-/- mice, respectively. Bregs also promoted liver cancer cell proliferation and migration in vitro, and tumor growth in vivo. Conclusion A significantly higher population of circulating Bregs, which are mobilized by small-for-size graft injury, may lead to a higher incidence of tumor recurrence and metastasis after LDLT. TLR4/CXCL10/CXCR3 signaling may play important roles on Bregs mobilization. Citation Format: Kwan Man, Yan Shao, Chang Xian Li, Chung Mau Lo. Acute phase liver graft injury mobilizes regulating B cells after transplantation for HCC patients through TLR4/CXCL10/CXCR3 signaling. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr 5032. doi:10.1158/1538-7445.AM2015-5032" @default.
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• W2247018674 date "2015-08-01" @default.
• W2247018674 modified "2023-09-30" @default.
• W2247018674 title "Abstract 5032: Acute phase liver graft injury mobilizes regulating B cells after transplantation for HCC patients through TLR4/CXCL10/CXCR3 signaling" @default.
• W2247018674 doi "https://doi.org/10.1158/1538-7445.am2015-5032" @default.
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