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Critical Function of PRDM2 in the Neoplastic Growth of Testicular Germ Cell Tumors
Erika Di Zazzo1, Carola Porcile2, Silvia Bartollino3
1Department of Health Sciences "Vincenzo Tiberio", University of Molise, Campobasso 86100, Italy. erika.dizazzo@unimol.it.
Abstract:
Testicular germ cell tumors (TGCTs) derive from primordial germ cells. Their maturation is blocked at different stages, reflecting histological tumor subtypes. A common genetic alteration in TGCT is a deletion of the chromosome 1 short arm, where the PRDM2 gene, belonging to the Positive Regulatory domain gene (PRDM) family, is located. Expression of PRDM2 gene is shifted in different human tumors, where the expression of the two principal protein forms coded by PRDM2 gene, RIZ1 and RIZ2, is frequently unbalanced. Therefore, PRDM2 is actually considered a candidate tumor suppressor gene in different types of cancer. Although recent studies have demonstrated that PRDM gene family members have a pivotal role during the early stages of testicular development, no information are actually available on the involvement of these genes in TGCTs. In this article we show by qRT-PCR analysis that PRDM2 expression level is modulated by proliferation and differentiation agents such as estradiol, whose exposure during fetal life is probably an important risk factor for TGCTs development in adulthood. Furthermore in normal and cancer germ cell lines, PRDM2 binds estradiol receptor α (ERα) and influences proliferation, survival and apoptosis, as previously reported using MCF-7 breast cancer cell line, suggesting a potential tumor-suppressor role in TGCT formation.
Insights
Testicular germ cell tumors (TGCTs) may involve the PRDM2 gene, a candidate tumor suppressor. Estradiol exposure and PRDM2
Area of Science:
- Oncology
- Genetics
- Developmental Biology
Background:
- Testicular germ cell tumors (TGCTs) originate from primordial germ cells with blocked maturation.
- A common genetic alteration in TGCT is a deletion on chromosome 1 short arm, affecting the PRDM2 gene.
- PRDM2, a member of the Positive Regulatory domain gene (PRDM) family, is a candidate tumor suppressor in various cancers.
Purpose of the Study:
- To investigate the role of PRDM2 in TGCT development.
- To determine if PRDM2 expression is modulated by agents like estradiol, a potential risk factor for TGCTs.
- To explore PRDM2's interaction with estradiol receptor alpha (ERα) and its influence on germ cell behavior.
Main Methods:
- Quantitative reverse transcription PCR (qRT-PCR) analysis to assess PRDM2 expression levels.
- Experiments conducted on normal and cancer germ cell lines.
- Investigation of PRDM2 binding to ERα and its effects on proliferation, survival, and apoptosis.
Main Results:
- PRDM2 expression levels are modulated by proliferation and differentiation agents, including estradiol.
- PRDM2 binds to ERα in normal and cancer germ cell lines.
- PRDM2 influences proliferation, survival, and apoptosis in germ cells, similar to its role in breast cancer cells.
Conclusions:
- PRDM2 plays a potential tumor-suppressor role in TGCT formation.
- Estradiol's modulation of PRDM2 suggests a link between fetal exposure and adult TGCT risk.
- PRDM2's interaction with ERα highlights its functional significance in germ cell biology and cancer.
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