Background: Thrombospondin-2 (TSP-2) is a secreted matricellular glycoprotein that is found to mediate cell-to-extracellular matrix attachment and participates in many physiological and pathological processes. The expression profile of TSP-2 on tumors is controversial, and it up-regulates in some cancers, whereas it down-regulates in others, suggesting that the functional role of TSP-2 on tumors is still uncertain. Methods: The expression of TSP-2 on prostate cancer progression was determined in the tissue array by the immunohistochemistry. The molecular mechanism of TSP-2 on prostate cancer (PCA) metastasis was investigated through pharmaceutical inhibitors, siRNAs, and miRNAs analyses. The role of TSP-2 on PCA metastasis in vivo was verified through xenograft in vivo imaging system. Results: Based on the gene expression omnibus database and immunohistochemistry, we found that TSP-2 increased with the progression of PCA, especially in metastatic PCA and is correlated with the matrix metalloproteinase-2 (MMP-2) expression. Additionally, through binding to CD36 and integrin ανβ3, TSP-2 increased cell migration and MMP-2 expression. With inhibition of p38, ERK, and JNK, the TSP-2-induced cell migration and MMP-2 expression were abolished, indicating that the TSP-2's effect on PCA is MAPK dependent. Moreover, the microRNA-376c (miR-376c) was significantly decreased by the TSP-2 treatment. Furthermore, the TSP-2-induced MMP-2 expression and the subsequent cell motility were suppressed upon miR-376c mimic stimulation. On the other hand, the animal studies revealed that the bone metastasis was abolished when TSP-2 was stably knocked down in PCA cells. Conclusions: Taken together, our results indicate that TSP-2 enhances the migration of PCA cells by increasing MMP-2 expression through down-regulation of miR-376c expression. Therefore, TSP-2 may represent a promising new target for treating PCA.
|Journal||Journal of Hematology and Oncology|
|Publication status||Published - Jan 25 2017|
- Matrix metalloproteinase-2
- Prostate cancer
ASJC Scopus subject areas
- Molecular Biology
- Cancer Research
FingerprintDive into the research topics of 'Thrombospondin-2 promotes prostate cancer bone metastasis by the up-regulation of matrix metalloproteinase-2 through down-regulating miR-376c expression'. Together they form a unique fingerprint.
Additional file 1: Figure S1. of Thrombospondin-2 promotes prostate cancer bone metastasis by the up-regulation of matrix metalloproteinase-2 through down-regulating miR-376c expression
Chu, C. (Creator), Chen, P. (Contributor), Lin, L. (Creator), Huang, Y. (Creator), Lin, T. (Creator), Tsai, C. (Creator) & Tang, C. (Contributor), Figshare, 2017
DOI: 10.6084/m9.figshare.c.3674824_d1.v1, https://doi.org/10.6084%2Fm9.figshare.c.3674824_d1.v1
Thrombospondin-2 promotes prostate cancer bone metastasis by the up-regulation of matrix metalloproteinase-2 through down-regulating miR-376c expression
Chen, P. (Contributor), Tang, C. (Contributor), Lin, L. (Creator), Tsai, C. (Creator), Chu, C. (Creator), Lin, T. (Creator) & Huang, Y. (Creator), Figshare, 2017
DOI: 10.6084/m9.figshare.c.3674824.v1, https://figshare.com/collections/Thrombospondin-2_promotes_prostate_cancer_bone_metastasis_by_the_up-regulation_of_matrix_metalloproteinase-2_through_down-regulating_miR-376c_expression/3674824/1