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MiR-92a Promotes Cell Metastasis of Colorectal Cancer Through PTEN-Mediated PI3K/AKT Pathway
Ist Teil von
Annals of surgical oncology, 2015-08, Vol.22 (8), p.2649-2655
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2015
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Background
MicroRNAs regulate gene expression at the posttranscriptional level and play important roles in tumor development, progression, and metastasis. The aim of this study was to investigate the role of microRNA-92a (
miR-92a
) in metastasis of colorectal cancer (CRC).
Methods
One hundred fifty-eight CRC patients were enrolled. The expression of
miR
-
92a, PTEN,
and
E
-
cadherin
was analyzed by real-time PCR. Univariate (Kaplan–Meier) analysis was used to analyze primary outcomes included 5-year overall survival and tumor recurrence. CRC cell model studies were used to analyze the
miR-92a
-involved CRC metastasis.
Results
The expression of
miR
-
92a
in tumor tissues was significantly positively correlated with lymph node metastasis in CRC patients (
p
= 0.012). After adjusting for age, sex, and disease differentiation, this correlation remained significant (
p
= 0.01). In addition, there was a negative correlation between levels of
miR-92a
and the
PTEN
gene (
p
< 0.0001). No any association of
miR
-
92a
and
E-cadherin
was found (
p
= 0.128). Patients with high
miR
-
92a
/low
PTEN
had poorer overall survival and disease-free survival rates than those with high
miR
-
92a
/high
PTEN,
low
miR
-
92a
/high
PTEN,
and low
miR
-
92a
/low
PTEN.
The association of levels of
miR
-
92a
and
PTEN
with tumor cell migration in CRC was also confirmed in CRC cell models.
Conclusions
We suggest that
miR-92a
is involved in lymph node metastasis of CRC patients through
PTEN
-regulated
PI3K/AKT
signaling pathway.