Received:18 October 2016,
Published:2017-07
移动端阅览
Hang Liu, Weimin Wang, Jianbo Zhang, et al. Role of HIF-2α-VEGF-Notch in angiogenesis of residual hepatocellular carcinoma after high intensity focused ultrasound[J]. Journal of Third Military Medical University, 2017, 39(7): 608-615.
Hang Liu, Weimin Wang, Jianbo Zhang, et al. Role of HIF-2α-VEGF-Notch in angiogenesis of residual hepatocellular carcinoma after high intensity focused ultrasound[J]. Journal of Third Military Medical University, 2017, 39(7): 608-615. DOI: 10.16016/j.1000-5404.201610123.
Objective
2
To determine the expression of hypoxia-inducible factor-1α (HIF-1α) and HIF-2α
vascular endothelium growth factor (VEGF) and Notch in the residual hepatocellular carcinoma (HCC) after high intensity focused ultrasound (HIFU).
Methods
2
The cell subline was established based on HCC SMMC7721 cells survived from HIFU treatment. Immunofluorescence staining was used to measure the expression of VEGF in normal control cells and HIFU treated cells. Real-time PCR and Western blotting were used to
measure the expression of HIF-1α
HIF-2α and VEGF at mRNA and protein levels at 0
6
12 and 24 h under hypoxic condition (1% O
2
) in both treated and control cells. Then
the treated cells was infected with lentiviral vectors LV-shRNA-VEGF
LV-shRNA-HIF-2α and LV-shRNA-NC respectively
and the mRNA and protein expression of VEGF
HIF-2α
Notch
and DLL4 was quantified by real-time PCR and Western blotting.
Results
2
The VEGF protein was mainly expressed in the cytoplasm in the treated and control cells. The expression of HIF-1α in the treated and control cells reached peak in 12 h after hypoxic treatment and then decreased
while the expression of HIF-2α and VEGF was increased with the time elapse (
P
<
0.05). The mRNA and protein expression of HIF-2α and VEGF was significantly lower in HIF-2α modulated cells than the treated cells (
P
<
0.05)
and that of VEGF
Notch and DLL4 was also decreased in the VEGF modulated cells than that in the treated cells (
P
<
0.05). The levels of HIF-2α
VEGF
Notch and DLL4 were significantly higher in the treated cells than control cells (
P
<
0.05).
Conclusion
2
Conclusion HIF-2α-VEGF-Notch signaling pathway is involved in the regulation of angiogenesis in residual hepatocellular carcinoma after HIFU treatment.
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