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Comprehensive microRNA expression analysis of pediatric gonadal germ cell tumors: unveiling novel biomarkers and
Ana Glenda Santarosa Vieira1,2,3, Luciane Sussuchi da Silva4, Eduardo Caetano Albino da Silva5
1Barretos Children's Cancer Hospital from Hospital de Amor, Brazil.
Abstract:
microRNAs (miRNAs) are small endogenous noncoding RNAs, and alterations in their expression may contribute to oncogenesis. Discovering a unique miRNA pattern holds the potential for early detection and novel treatment possibilities in cancer. This study aimed to evaluate miRNA expression in pediatric patients with gonadal germ cell tumors (GCTs), focusing on characterizing the miRNA profiles of each histological subtype and identifying a distinct histological miRNA signature for a total of 42 samples of pediatric gonadal GCTs. The analysis revealed distinct miRNA expression profiles for all histological types, regardless of the primary site. We identified specific miRNA expression signatures for each histological type, including 34 miRNAs for dysgerminomas, 13 for embryonal carcinomas, 25 for yolk sac tumors, and one for immature teratoma, compared to healthy controls. Furthermore, we identified 26 miRNAs that were commonly expressed in malignant tumors, with six miRNAs (miR-302a-3p, miR-302b-3p, miR-371a-5p, miR-372-3p, miR-373-3p, and miR-367-3p) showing significant overexpression. Notably, miR-302b-3p exhibited a significant association with all the evaluated clinical features. Our findings suggest that miRNAs have the potential to aid in the diagnosis, prognosis, and management of patients with malignant GCTs.
Insights
microRNAs (miRNAs) show distinct expression patterns in pediatric gonadal germ cell tumors (GCTs). Identifying these miRNA signatures may improve early detection and treatment strategies for GCTs.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are small noncoding RNAs implicated in cancer development.
- Altered miRNA expression is linked to oncogenesis, offering potential for cancer biomarkers.
- Pediatric gonadal germ cell tumors (GCTs) require precise diagnostic and prognostic tools.
Purpose of the Study:
- To investigate miRNA expression profiles in pediatric gonadal GCTs.
- To characterize distinct miRNA signatures for each histological subtype of GCT.
- To identify potential miRNA-based biomarkers for GCT diagnosis and prognosis.
Main Methods:
- Analysis of miRNA expression in 42 pediatric gonadal GCT samples.
- Comparison of miRNA profiles across different histological subtypes (dysgerminomas, embryonal carcinomas, yolk sac tumors, immature teratoma).
- Identification of specific miRNA signatures and commonly expressed miRNAs in malignant GCTs compared to controls.
Main Results:
- Distinct miRNA expression profiles were observed for all GCT histological types.
- Specific miRNA signatures were identified: 34 for dysgerminomas, 13 for embryonal carcinomas, 25 for yolk sac tumors, and 1 for immature teratoma.
- Six miRNAs (miR-302a-3p, miR-302b-3p, miR-371a-5p, miR-372-3p, miR-373-3p, miR-367-3p) were significantly overexpressed in malignant GCTs; miR-302b-3p correlated with clinical features.
Conclusions:
- miRNA expression patterns are unique to each histological subtype of pediatric gonadal GCT.
- Identified miRNA signatures may serve as diagnostic and prognostic indicators.
- Specific miRNAs, particularly miR-302b-3p, show potential for guiding GCT management.
