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SFRP1 and SFRP2 suppress the transformation and invasion abilities of cervical cancer cells through Wnt signal pathway.
Gynecol Oncol. 2009 Mar; 112(3):646-53.GO

Abstract

OBJECTIVES

Aberrant activation of the Wnt/beta-catenin signaling pathway is common in human cancers, including cervical cancer. The secreted frizzled-related proteins (SFRPs) function as Wnt antagonists and play important implications in carcinogenesis. Recently, we have shown that SFRP1 and SFRP2 are frequently downregulated through promoter hypermethylation. However, the function of SFRP1 and SFRP2 in cervical cancer remains unclear.

METHODS

To improve our understanding of the role of SFRP1 and SFRP2 in cervical cancer cells, we use overexpression or shRNA approach in cervical cancer cell lines.

RESULTS

Restoration of the expression of SFRP1 and SFRP2 attenuated Wnt signaling in CaSki cells, decreased abnormal accumulation of free beta-catenin in the nucleus, and suppressed cancer cell growth. In addition, different statuses of beta-catenin accumulation in the cytoplasm of CaSki or HeLa3rd cells were observed, suggesting that different Wnt pathways are executed. Furthermore, we demonstrated that SFRP1 and SFRP2 enhance the expression of the epithelial marker E-cadherin, through inhibition of the expression of SLUG, TWIST and SNAIL, three transcription factors involved in the epithelial mesenchymal transition (EMT) program. Finally, in a xenograft animal model, we showed that SFRP1 suppresses tumorigenicity of cancer cells in vivo.

CONCLUSIONS

Taken together, these data strongly suggest that epigenetic silencing of SFRP genes leads to oncogenic activation of the Wnt pathway and contributes to cervical cancer progression through the EMT program.

Authors+Show Affiliations

Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19095296

Citation

Chung, Ming-Tzeung, et al. "SFRP1 and SFRP2 Suppress the Transformation and Invasion Abilities of Cervical Cancer Cells Through Wnt Signal Pathway." Gynecologic Oncology, vol. 112, no. 3, 2009, pp. 646-53.
Chung MT, Lai HC, Sytwu HK, et al. SFRP1 and SFRP2 suppress the transformation and invasion abilities of cervical cancer cells through Wnt signal pathway. Gynecol Oncol. 2009;112(3):646-53.
Chung, M. T., Lai, H. C., Sytwu, H. K., Yan, M. D., Shih, Y. L., Chang, C. C., Yu, M. H., Liu, H. S., Chu, D. W., & Lin, Y. W. (2009). SFRP1 and SFRP2 suppress the transformation and invasion abilities of cervical cancer cells through Wnt signal pathway. Gynecologic Oncology, 112(3), 646-53. https://doi.org/10.1016/j.ygyno.2008.10.026
Chung MT, et al. SFRP1 and SFRP2 Suppress the Transformation and Invasion Abilities of Cervical Cancer Cells Through Wnt Signal Pathway. Gynecol Oncol. 2009;112(3):646-53. PubMed PMID: 19095296.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - SFRP1 and SFRP2 suppress the transformation and invasion abilities of cervical cancer cells through Wnt signal pathway. AU - Chung,Ming-Tzeung, AU - Lai,Hung-Cheng, AU - Sytwu,Huey-Kang, AU - Yan,Ming-De, AU - Shih,Yu-Lueng, AU - Chang,Cheng-Chang, AU - Yu,Mu-Hsien, AU - Liu,Hang-Seng, AU - Chu,Da-Wei, AU - Lin,Ya-Wen, Y1 - 2008/12/18/ PY - 2008/09/12/received PY - 2008/10/20/revised PY - 2008/10/31/accepted PY - 2008/12/20/entrez PY - 2008/12/20/pubmed PY - 2009/3/17/medline SP - 646 EP - 53 JF - Gynecologic oncology JO - Gynecol Oncol VL - 112 IS - 3 N2 - OBJECTIVES: Aberrant activation of the Wnt/beta-catenin signaling pathway is common in human cancers, including cervical cancer. The secreted frizzled-related proteins (SFRPs) function as Wnt antagonists and play important implications in carcinogenesis. Recently, we have shown that SFRP1 and SFRP2 are frequently downregulated through promoter hypermethylation. However, the function of SFRP1 and SFRP2 in cervical cancer remains unclear. METHODS: To improve our understanding of the role of SFRP1 and SFRP2 in cervical cancer cells, we use overexpression or shRNA approach in cervical cancer cell lines. RESULTS: Restoration of the expression of SFRP1 and SFRP2 attenuated Wnt signaling in CaSki cells, decreased abnormal accumulation of free beta-catenin in the nucleus, and suppressed cancer cell growth. In addition, different statuses of beta-catenin accumulation in the cytoplasm of CaSki or HeLa3rd cells were observed, suggesting that different Wnt pathways are executed. Furthermore, we demonstrated that SFRP1 and SFRP2 enhance the expression of the epithelial marker E-cadherin, through inhibition of the expression of SLUG, TWIST and SNAIL, three transcription factors involved in the epithelial mesenchymal transition (EMT) program. Finally, in a xenograft animal model, we showed that SFRP1 suppresses tumorigenicity of cancer cells in vivo. CONCLUSIONS: Taken together, these data strongly suggest that epigenetic silencing of SFRP genes leads to oncogenic activation of the Wnt pathway and contributes to cervical cancer progression through the EMT program. SN - 1095-6859 UR - https://www.unboundmedicine.com/medline/citation/19095296/SFRP1_and_SFRP2_suppress_the_transformation_and_invasion_abilities_of_cervical_cancer_cells_through_Wnt_signal_pathway_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0090-8258(08)00932-3 DB - PRIME DP - Unbound Medicine ER -