circRNA basic information
circBase ID: hsa_circ_0066556
Name: hsa_circ_ROBO2
Synonym: circROBO2
Host Gene: ROBO2
Genomic location(hg19): chr3:77147164-77147491:+
Genomic location(hg38): chr3:77098013-77098340:+
Subcellular localization: cytoplasm
 
 
 
 
 
 
 
Disease basic information
MONDO ID:
0005233
MONDO name: non-small cell lung carcinoma
Disease details: non-small cell lung cancer
Disease DO ID:
3908
Disease MeSH ID:
D002289
Disease NCIt ID:
C2926
Disease ICD11 ID:
-
Disease OMIM ID:
-
Species: Human
Species details: Homo sapiens
Tissue specimen:

-

Cell lines:

HCC4006; HCC4006OR; HEK293T; 293 T; H1975

In vivo animal model:

-

circRNA-disease information
Expression pattern:
UP
Associated gene: PDGFB, MAPK pathway, RAF/MEK/ERK cascade, AGO2, RISC
Associated microRNA: miR-625-5p
Biological function: enhances cell survival, proliferation, and invasion; suppresses apoptosis; promotes osimertinib resistance; circROBO2 knockdown partially restores osimertinib sensitivity
Molecular mechanism: circROBO2 acts as a ceRNA/molecular sponge for miR-625-5p, increasing PDGFB expression and activating the MAPK pathway, particularly the RAF/MEK/ERK cascade, to promote osimertinib resistance
Biological pathway or process:

MAPK (promotes); ERK (promotes); proliferation (promotes); invasion (promotes); apoptosis (inhibits); drug resistance (promotes); ceRNA regulation (other)

Detected method:
Q
S
Validation methods:

Back-Splice Junction PCR / divergent primers PCR; RNase R Treatment; Sanger Sequencing; RT-qPCR; RNA-seq; FISH / smFISH; Nuclear-Cytoplasmic Fractionation; RIP (RNA Immunoprecipitation); Luciferase Reporter Assay; Transfection; CCK8; EdU Staining; Colony Formation Assay; Annexin V/PI Flow Cytometry; Transwell Assay; Western Blot; Bioinformatics Analysis

Clinical significance:

potential therapeutic target and biomarker for NSCLC treatment and osimertinib resistance

Description:

circROBO2 (hsa_circ_0066556), derived from ROBO2, is up-regulated in osimertinib-resistant NSCLC cells. It promotes osimertinib resistance by sponging miR-625-5p, increasing PDGFB expression, and activating the MAPK/RAF/MEK/ERK pathway, thereby enhancing survival, proliferation, and invasion while reducing apoptosis. The study proposes circROBO2 as a potential biomarker and therapeutic target for osimertinib resistance in NSCLC.

Confidence score:

0.7961

Other information
Title:

CircROBO2 Orchestrates Osimertinib Resistance Through miR-625-5p/PDGFB-Mediated MAPK Activation in Non-Small Cell Lung Cancer.

Journal: IUBMB life
Published: 2025
PubMed ID: 40719479
Study type:

biological research

Data availability: The data will be available from the corresponding author on reasonable request.
Code availability: -