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Published on: September 18, 2013
SPANXN2 functions a cell migration inhibitor in testicular germ cell tumor cells
Fang Zhu1, Hao Bo1,2, Guangmin Liu1
1Institute of Reproductive & Stem Cell Engineering, School of Basic MedicalScience, Central South University, Changsha, Hunan, China.
Background:
SPANX family members are thought to play an important role in cancer progression. The SPANXN2 is a gene expressed mainly in normal testis, but its role in testicular germ cell tumors (TGCTs) has yet to be investigated. TGCT is one of the most common solid tumors in young men and is associated with poor prognosis; however, effective prognostic indicators remain elusive. Therefore, we investigated the role of SPANXN2 in TGCT development.
Methods:
SPANXN2 expression levels were validated by quantitative real-time polymerase chain reaction (qRT-PCR) analyses of 14 TGCT samples and five adjacent normal tissue samples. SPANXN2 was transiently overexpressed in TGCT cells to study the consequences for cell function. The effects of SPANXN2 on cell migration were evaluated in transwell and wound healing assays. The effects on cloning ability were evaluated in colony formation assays. MTT assays and cell cycle analysis were used to detect the effects of SPANXN2 on cell proliferation. The expression levels of EMT- and AKT-related proteins in cells overexpressing SPANXN2 were analyzed by Western blotting.
Results:
Compared with adjacent normal tissues, the Gene Expression Profiling Interactive Analysis database showed SPANXN2 expression was downregulated in TGCTs which was consistent with the qRT-PCR analysis. SPANXN2 overexpression reduced cell migration and colony formation capability and downregulated expression of EMT- and AKT-related proteins, Vimentin, Snail, AKT, and p-AKT.
Conclusion:
Our results suggest that SPANXN2 regulates TGCT cell migration via EMT- and AKT-related proteins although its role in the occurrence and development of TGCT remains to be fully elucidated.
Insights
SPANXN2 gene expression is reduced in testicular germ cell tumors (TGCTs). Overexpressing SPANXN2 inhibits TGCT cell migration and proliferation by downregulating EMT and AKT signaling pathways.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- SPANX family genes are implicated in cancer progression.
- Testicular germ cell tumors (TGCTs) are common in young men with poor prognosis.
- The role of SPANXN2 in TGCT development is largely unknown.
Purpose of the Study:
- To investigate the expression and function of SPANXN2 in TGCT.
- To determine the potential of SPANXN2 as a prognostic indicator for TGCT.
Main Methods:
- Quantitative real-time polymerase chain reaction (qRT-PCR) to analyze SPANXN2 expression in TGCT samples.
- In vitro assays (transwell, wound healing, colony formation, MTT, cell cycle) to assess the impact of SPANXN2 overexpression on TGCT cell behavior.
- Western blotting to examine the expression of epithelial-mesenchymal transition (EMT) and AKT pathway-related proteins.
Main Results:
- SPANXN2 expression was found to be downregulated in TGCT samples compared to adjacent normal tissues.
- Overexpression of SPANXN2 significantly reduced TGCT cell migration and colony formation.
- SPANXN2 overexpression led to the downregulation of EMT markers (Vimentin, Snail) and AKT pathway proteins (AKT, p-AKT).
Conclusions:
- SPANXN2 plays a role in regulating TGCT cell migration, likely through the modulation of EMT and AKT signaling pathways.
- Further research is needed to fully elucidate the role of SPANXN2 in the occurrence and development of TGCT.
