title: HGFK1 inhibits bone metastasis in breast cancer through the TAK1/p38 MAPK signaling pathway.
abstract: Breast cancer metastasis to bone represents a devastating complication of advanced breast cancer, frequently resulting in significant increases in morbidity and mortality. An understanding of the mechanisms that govern breast cancer metastasis at the molecular level should lead to more effective therapies. Recently, the kringle 1 domain of human hepatocyte growth factor (HGFK1) was identified as a candidate metastasis suppressor gene. Here, we investigated whether HGFK1 is a key regulator of breast cancer bone metastasis. Of the 193 human breast carcinoma tissue samples examined, HGFK1 expression was relative higher in 82 (42.4%) by western blot and in 84 (43.5%) by quantitative real-time PCR. The higher expression of HGFK1 was significantly associated with a better prognostic value (P<0.001) and inversely correlated with bone metastasis (P=0.003). The efficacy of adeno-associated virus carrying HGFK1 (AAV-HGFK1) in osteolytic bone metastasis was then evaluated using an in vivo bone metastasis model. AAV-HGFK1 significantly inhibited osteolytic bone metastasis and prolonged the survival of mice in this model (P<0.01). In vitro, HGFK1 expression resulted in significant anti-invasion effects, enhanced the phosphorylation of TAK1 (transforming growth factor-β-activated kinase 1), p38 MAPK (mitogen-activated protein kinase) and MAPKAPK2 (MAPK-activated protein kinase 2) and decreased the expression of receptor activator of nuclear factor-κB (RANK), which was abrogated by the p38 MAPK inhibitor SB203580. This study shows for the first time that HGFK1 significantly inhibits the metastasis of breast cancer to bone by activating the TAK1/p38 MAPK signaling pathway and inhibiting RANK expression. Thus, AAV-HGFK1 treatment represents a potential therapy for bone metastasis in breast cancer.
authors: Department of Oncology, Affiliated 6th People's Hospital, Shanghai Jiaotong University, People's Republic of China.
authors: Y
authors: Y
authors: Yao
authors: Z-P
authors: ZP
authors: Fang
authors: H
authors: H
authors: Chen
authors: L
authors: L
authors: Yue
authors: D-l
authors: DL
authors: Min
authors: L-N
authors: LN
authors: Tang
authors: W-X
authors: WX
authors: Yu
authors: H F
authors: HF
authors: Kung
authors: M C
authors: MC
authors: Lin
authors: Z
authors: Z
authors: Shen
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001859:Bone Neoplasms / Q000556:secondary / Q000628:therapy*; D001943:Breast Neoplasms / Q000473:pathology / Q000628:therapy*; D045744:Cell Line, Tumor; D002465:Cell Movement; D000229:Dependovirus / Q000235:genetics / Q000378:metabolism; D004354:Drug Screening Assays, Antitumor; D004789:Enzyme Activation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D016147:Genes, Tumor Suppressor; D015316:Genetic Therapy / Q000379:methods; D005822:Genetic Vectors / Q000235:genetics / Q000378:metabolism; D017228:Hepatocyte Growth Factor / Q000008:administration & dosage / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism; D018082:Kringles; D020930:MAP Kinase Kinase Kinases / Q000235:genetics / Q000378:metabolism*; D020935:MAP Kinase Signaling System; D051379:Mice; D008807:Mice, Inbred BALB C; D008875:Middle Aged; D010766:Phosphorylation; D011379:Prognosis; D017346:Protein Serine-Threonine Kinases / Q000235:genetics / Q000378:metabolism; D011725:Pyridines / Q000494:pharmacology; D060888:Real-Time Polymerase Chain Reaction / Q000379:methods; D053246:Receptor Activator of Nuclear Factor-kappa B / Q000235:genetics / Q000378:metabolism; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D000099190:MAP-Kinase-Activated Kinase 2; D000099151:MAP Kinase Kinase Kinase 7
chemical_list: D017228:Hepatocyte Growth Factor; D007093:Imidazoles; D047908:Intracellular Signaling Peptides and Proteins; D020930:MAP Kinase Kinase Kinases; D017346:Protein Serine-Threonine Kinases; D011725:Pyridines; D053246:Receptor Activator of Nuclear Factor-kappa B; D048051:p38 Mitogen-Activated Protein Kinases; D000099190:MAP-Kinase-Activated Kinase 2; D000099151:MAP Kinase Kinase Kinase 7; C066855:HGF protein, human; C505686:TNFRSF11A protein, human; C093642:SB 203580