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Oncomirs Expression Profiling in Uterine Leiomyosarcoma Cells.

Bruna Cristine de Almeida1, Natalia Garcia2, Giovana Maffazioli3

  • 1Laboratório de Ginecologia Estrutural e Molecular (LIM 58), Disciplina de Ginecologia, Departamento de Obstetricia e Ginecologia, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, HCFMUSP, SP, BR Av. Dr Arnaldo 455, sala 4121, 05403-010 Cerqueira Cesar, São Paulo, Brazil. bruc_10@hotmail.com.

International Journal of Molecular Sciences
|January 4, 2018
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) regulate gene expression and are implicated in cancer. This study identified specific miRNAs with altered expression in uterine leiomyoma and leiomyosarcoma cells, potentially impacting key cancer-related genes.

Keywords:
cell culturemiRNAoncomirsuterine leiomyomauterine leiomyosarcoma

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Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression post-transcriptionally.
  • Aberrant miRNA expression is linked to malignant cell transformation and tumorigenesis.
  • Uterine leiomyoma (ULM) and uterine leiomyosarcoma (ULMS) are common gynecological tumors with complex molecular underpinnings.

Purpose of the Study:

  • To investigate the expression profiles of 84 miRNAs associated with tumorigenesis.
  • To compare miRNA expression in immortalized myometrium (MM), ULM, and ULMS cell lines.
  • To identify specific miRNAs with altered expression patterns in ULM and ULMS relevant to patient samples.

Main Methods:

  • Culturing of MM, ULM, and ULMS cell lines.
  • Quantitative reverse transcription polymerase chain reaction (qRT-PCR) for miRNA expression analysis.
  • Comparison of miRNA expression data between cell lines and patient samples.

Main Results:

  • Thirteen miRNAs showed differential expression in ULM and ULMS compared to MM cell lines.
  • Eight miRNAs were overexpressed and five underexpressed in ULM; five overexpressed and eight down-regulated in ULMS.
  • Six miRNAs (miR-1-3p, miR-130b-3p, miR-140-5p, miR-202-3p, miR-205-5p, miR-7-5p) exhibited similar patterns in cell lines and patient samples.
  • Four differentially expressed miRNAs (miR-1-3p, miR-140-5p, miR-7-5p in ULM; miR-1-3p, miR-202-3p, miR-7-5p in ULMS) showed significant expression changes and interacted with cancer-related genes (BCL2, EGFR, VEGFA, IGF1R, RAF1, MET, MYCN).

Conclusions:

  • Identified 24 oncomiRs with altered expression in ULM and ULMS cells.
  • Four specific miRNAs demonstrated consistent dysregulation in both cell lines and patient samples.
  • These miRNAs interact with critical genes involved in apoptosis, growth factor signaling, and angiogenesis, suggesting their role in uterine tumor development.