Benzyl butyl phthalate induces migration, invasion, and angiogenesis of Huh7 hepatocellular carcinoma cells through nongenomic AhR-G-protein signalingReportar como inadecuado

Benzyl butyl phthalate induces migration, invasion, and angiogenesis of Huh7 hepatocellular carcinoma cells through nongenomic AhR-G-protein signaling - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

BMC Cancer

, 14:556

Cell and molecular biology


BackgroundThe widespread use of phthalates as plasticizers has raised public health concerns regarding their adverse effects, including an association with cancer. Although animal investigations have suggested an association between phthalate exposure and hepatocellular carcinoma, the mechanisms are unknown.

MethodsThe hepatocellular carcinoma cell line Huh7 was treated with benzyl butyl phthalate BBP, and then analyzed by total internal reflection fluorescence microscopy, confocal microscopy and double immunogold transmission electron microscopy. Following BBP treatment, mRNA levels were measured by RT-PCR, protein levels were measured using western blot, and vascular endothelial growth factor levels were measured by an enzyme-linked immunosorbent assay. Cell migration and invasion assays were evaluated by transwell, and angiogenesis were performed by a tube formation assay. Nude mice were used to investigate metastasis and angiogenesis in vivo.

ResultsBBP affected hepatocellular carcinoma progression through the aryl hydrocarbon receptor AhR and that benzyl butyl phthalate BBP stimulated AhR at the cell surface, which then interacted with G proteins and triggered a downstream signaling cascade. BBP activated AhR through a nongenomic action involving G-protein signaling rather than the classical genomic AhR action. BBP treatment promoted cell migration and invasion in vitro and metastasis in vivo via the AhR-Gβ-PI3K-Akt-NF-κB pathway. In addition, BBP induced both in vitro and in vivo angiogenesis through the AhR-ERK-VEGF pathway.

ConclusionsThese findings suggest a novel nongenomic AhR mechanism involving G-protein signaling induced by phthalates, which contributes to tumor progression of hepatocellular carcinoma.

KeywordsPhthalate Aryl hydrocarbon receptor Angiogenesis Migration Hepatocellular carcinoma AbbreviationsBBPBenzyl butyl phthalaye

AhRAryl hydrocarbon receptor

DEHPBis2-ethylhexyl phthalate


2-APB2-aminoethoxydiphenyl borate


PBSPhosphate-buffered saline

SSCSaline-sodium citrate


DREDioxin response element.

Electronic supplementary materialThe online version of this article doi:10.1186-1471-2407-14-556 contains supplementary material, which is available to authorized users.

Eing-Mei Tsai and Po-Lin Kuo contributed equally to this work.

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Autor: Cheng-Fang Tsai - Tsung-Hua Hsieh - Jau-Nan Lee - Chia-Yi Hsu - Yu-Chih Wang - Feng-Jie Lai - Kung-Kai Kuo - Hua-Lin Wu -


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