circRNA basic information
circBase ID: hsa_circ_0017636
Name: hsa_circ_SFMBT2
Synonym: -
Host Gene: SFMBT2
Genomic location(hg19): chr10:7285519-7327916:-
Genomic location(hg38): chr10:7243557-7285954:-
Subcellular localization: cytoplasm; exosome
 
 
 
 
 
 
 
Disease basic information
MONDO ID:
0018177
MONDO name: glioblastoma
Disease details: glioblastoma
Disease DO ID:
3068
Disease MeSH ID:
D005909
Disease NCIt ID:
C3058
Disease ICD11 ID:
-
Disease OMIM ID:
-
Species: Human
Species details: Homo sapiens
Tissue specimen:

GBM tissues; adjacent normal tissues; normal brain tissues; low-grade glioma tissues; subcutaneous tumor tissue

Cell lines:

U251; U343; U343-R; U251-R; 293 T

In vivo animal model:

cell line-derived xenograft

circRNA-disease information
Expression pattern:
DN
Associated gene: ARRB1, Ki-67, P-gp, GST-pi, MDM2, MGMT
Associated microRNA: miR-665
Biological function: circ_0017636 acts as a tumor suppressor, inhibits proliferation, migration and invasion, restores TMZ sensitivity, suppresses xenograft tumor growth, and propagates chemosensitivity via exosomal transfer.
Molecular mechanism: circ_0017636 functions as a ceRNA that sponges miR-665 to de-repress ARRB1; exosome-mediated delivery transfers circ_0017636 to recipient GBM cells and restores chemosensitivity.
Biological pathway or process:

proliferation (inhibits); migration (inhibits); invasion (inhibits); drug resistance (inhibits); chemoresistance (inhibits); ceRNA regulation (other); p53 signaling (promotes)

Detected method:
Q
S
Validation methods:

Back-Splice Junction PCR / divergent primers PCR; RNase R Treatment; Sanger Sequencing; circRNA-seq; Actinomycin D / DRB Stability Assay; RT-qPCR; FISH / smFISH; Nuclear-Cytoplasmic Fractionation; Clinical Sample Validation; Luciferase Reporter Assay; Transfection; CCK8; EdU Staining; Transwell Assay; IF (Immunofluorescence); Western Blot; In Vivo Animal Model; Survival Analysis; ROC Analysis; Bioinformatics Analysis

Clinical significance:

circ_0017636 is associated with TMZ resistance and prognosis, has diagnostic potential for distinguishing GBM from normal tissues, and may serve as a prognostic biomarker and therapeutic target.

Description:

circ_0017636 is a downregulated tumor-suppressive circRNA in GBM and TMZ-resistant GBM. It reverses TMZ resistance and suppresses malignant phenotypes by sponging miR-665 to restore ARRB1 expression, and exosome-mediated delivery of circ_0017636 propagates chemosensitivity and inhibits xenograft tumor growth. Low circ_0017636 expression is associated with poorer overall survival, while its expression shows diagnostic potential for GBM.

Confidence score:

0.863

Other information
Title:

Intercellular transfer of circ_0017636 via exosomal vehicles overcomes glioblastoma chemoresistance through ARRB1-mediated signaling restoration.

Journal: Cellular signalling
Published: 2026
PubMed ID: 41765310
Study type:

combined biological and clinical study

Data availability: sequencing data are available from the corresponding author upon reasonable request
Code availability: -