Dysfunction of miR-802 in tumors

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• MicroRNA-802 (miR-802) exhibits dysregulation in various human malignancies.
• Its expression levels vary, being downregulated in cancers like gastric, breast, and colorectal, but upregulated in others such as hepatocellular carcinoma and osteosarcoma.

Purpose of the Study:

• To review the aberrant expression patterns of miR-802 in diverse tumor types.
• To elucidate the molecular mechanisms underlying miR-802's role in tumor progression through target gene regulation and signaling pathway modulation.
• To explore the ceRNA network involving miR-802 and its potential as a diagnostic and prognostic biomarker.

Main Methods:

• Literature review of studies investigating miR-802 expression and function in cancer.
• Analysis of miR-802's regulatory roles in critical cancer signaling pathways (Wnt, EMT, PI3K/AKT, ERK, Hedgehog).
• Examination of the competitive endogenous RNA (ceRNA) network influencing miR-802 levels.

Main Results:

• miR-802 is differentially expressed in numerous cancers, with specific patterns of downregulation or upregulation.
• miR-802 influences tumor progression by targeting various genes and modulating key oncogenic signaling pathways.
• The ceRNA network, involving circDONSON, IGFL2-AS1, MIR155HG, and MIR4435-2HG, plays a role in regulating miR-802.

Conclusions:

• miR-802 is a significant player in tumorigenesis with diverse expression profiles across different cancer types.
• Understanding miR-802's regulatory functions and ceRNA interactions is crucial for developing novel cancer therapies.
• miR-802 holds promise as a potential biomarker for cancer diagnosis and prognosis.