EGF-mediated reduced miR-92a-1-5p controls HTR-8/SVneo cell invasion through activation of MAPK8 and FAS which in...

Area of Science:

• Molecular Biology
• Cancer Research
• Cell Biology

Background:

• The miR-17-92 cluster is linked to cancer progression and increased invasiveness.
• Trophoblastic cells play a crucial role in placental development and function.
• Epidermal growth factor (EGF) signaling is involved in cell growth and invasion.

Purpose of the Study:

• To investigate the role of miR-92a-1-5p in EGF-mediated trophoblast cell invasion.
• To identify the molecular targets and regulatory mechanisms of miR-92a-1-5p in HTR-8/SVneo cells.

Main Methods:

• Next-generation sequencing (NGS) and quantitative reverse transcription PCR (qRT-PCR) for gene expression analysis.
• Western blotting to assess protein levels.
• Luciferase reporter assays and rescue assays to confirm target interactions.
• RNA interference (siRNA) and pharmacological inhibitors for gene silencing and pathway analysis.

Main Results:

• EGF treatment reduced miR-92a-1-5p expression in HTR-8/SVneo cells.
• Overexpression of miR-92a-1-5p inhibited EGF-induced cell invasion.
• MAPK8 and FAS were identified as direct targets of miR-92a-1-5p, and their inhibition reduced invasion.
• EGF increased MMP-2/MMP-9 and decreased TIMP1 expression, an effect modulated by MAPK8 and FAS.
• STAT1/STAT3 signaling pathways were found to regulate EGF-mediated miR-92a-1-5p expression.

Conclusions:

• EGF downregulates miR-92a-1-5p, potentially via STAT1/STAT3, promoting trophoblast cell invasion.
• Targeting MAPK8 and FAS by miR-92a-1-5p is a key mechanism controlling cell invasion and MMP/TIMP balance.
• These findings highlight miR-92a-1-5p as a potential therapeutic target in cancers associated with altered cell invasion.