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Slide Preparation Method to Preserve Three-dimensional Chromatin Architecture of Testicular Germ Cells
Published on: January 10, 2014
c-MET receptor as potential biomarker and target molecule for malignant testicular germ cell tumors
Katia Corano Scheri1, Erica Leonetti1, Luigi Laino2
1Department of Anatomy, Histology, Forensic-Medicine and Orthopaedics, "Sapienza" University of Rome, Italy.
Abstract:
Type II testicular germ cell tumors (TGCTs) represent the most frequent malignancy in Caucasian males (20-40 years). Even if diagnosed with disseminated disease, >80% of patients are cured; however, a small percentage of cases progress and result in death. It is commonly accepted that these cancers arise from a disturbed testicular embryonic niche that leads to the block of gonocyte differentiation. The subsequent development of the invasive seminomas and non-seminomas is due to a combination of genetic, epigenetic and microenvironment-based alterations (genvironment). Hepatocyte growth factor (HGF) is present in the testicular microenvironment, together with its receptor c-MET, from early embryonic development to an adult stage. In addition, c-MET is a well-known proto-oncogene involved in the onset and progression of various human cancers. Herein, we have investigated the expression and availability of HGF and c-MET in TCam-2, NCCIT and NT2D1 cells, which are type II (T)GCT representative cell lines, and the effect of c-MET activation/repression on the regulation of cancerous biological processes. We found that NT2D1 cells increase their proliferation, polarized migration, and invasion in response to HGF administration. NCCIT cells respond to HGF stimulation only partially, whereas TCam-2 cells do not respond to HGF, at least according to the investigated parameters. Interestingly, the immunohistochemical study of c-MET distribution in TGCTs confirm its presence in both seminoma and non-seminoma lesions with different patterns. Notably, we found the highest c-MET immunoreactivity in the epithelial elements of the various components of TGCTs: teratoma, yolk sac tumor and choriocarcinoma.
Insights
Hepatocyte growth factor (HGF) and its receptor c-MET are implicated in type II testicular germ cell tumors (TGCTs). HGF signaling affects TGCT cell proliferation, migration, and invasion, with c-MET expression varying across tumor types.
Area of Science:
- Oncology
- Molecular Biology
- Reproductive Medicine
Background:
- Type II testicular germ cell tumors (TGCTs) are the most common malignancy in Caucasian males aged 20-40.
- While >80% of patients achieve cure, a subset experiences fatal progression.
- TGCTs are thought to originate from a disrupted embryonic testicular niche, blocking gonocyte differentiation and leading to invasive cancers via "genvironmental" alterations.
Purpose of the Study:
- To investigate the expression and availability of hepatocyte growth factor (HGF) and its receptor c-MET in type II TGCT cell lines.
- To determine the effect of c-MET activation and repression on cancer-related biological processes in these cell lines.
- To analyze c-MET distribution in human TGCT tissues.
Main Methods:
- Expression analysis of HGF and c-MET in TCam-2, NCCIT, and NT2D1 type II TGCT cell lines.
- Assessment of HGF's effect on cell proliferation, polarized migration, and invasion.
- Immunohistochemical study of c-MET distribution in seminoma and non-seminoma TGCT lesions.
Main Results:
- NT2D1 cells showed increased proliferation, migration, and invasion upon HGF administration.
- NCCIT cells exhibited a partial response to HGF, while TCam-2 cells showed no significant response.
- Immunohistochemistry confirmed c-MET presence in both seminoma and non-seminoma TGCTs, with highest immunoreactivity in the epithelial components of teratoma, yolk sac tumor, and choriocarcinoma.
Conclusions:
- HGF/c-MET signaling plays a role in the behavior of specific type II TGCT subtypes, particularly NT2D1 cells.
- Differential c-MET expression patterns in TGCT tissues suggest a potential role in tumor progression and heterogeneity.
- Targeting the HGF/c-MET pathway may offer therapeutic avenues for specific TGCTs.
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