Evaluation of the role of platelet derived growth factor in papillary thyroid carcinoma by targeted ultrasound contrast agent
10.3760/cma.j.issn.1004-4477.2018.07.017
- VernacularTitle: 靶向超声造影评估血小板衍生生长因子在甲状腺乳头状癌血管生成中作用的初步研究
- Author:
Jiying GU
1
;
Huiping ZHANG
;
Feng GAO
;
Yang LIU
;
Fan LI
;
Min BAI
;
Xuemei ZHANG
;
Lin YUAN
;
Lianfang DU
Author Information
1. Department of Ultrasound, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
- Publication Type:Journal Article
- Keywords:
Ultrasonography;
Thyroid neoplasms;
Receptor, platelet derived growth factor alpha;
Contrast media, Target;
Angiogenesis
- From:Chinese Journal of Ultrasonography
2018;27(7):623-629
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the role of targeted ultrasound contrast agent in the evaluation of angiogenesis in papillary thyroid carcinoma (PTC) in nude mice by constructing platelet derived growth factor receptor α (PDGFRα)-targeted ultrasound contrast agents, and to explore the effect of platelet derived growth factor (PDGF) on angiogenesis in PTC.
Methods:PDGFRα-targeted ultrasound contrast agents were constructed through biotin-avidin linkage, and blank micro-bubbles were served as control group. After the siRNA-PDGF BCPAP cell line was established, well prepared BCPAP cells or siRNA-PDGF-BCPAP cells were injected subcutaneously into the back of male BABL/C nude mice. The growth of the tumors was observed closely. All tumors of the normal group and the siRNA-PDGF group were examined by PDGFRα-targeted ultrasound contrast agents or blank micro-bubbles, and the dynamic images were analyzed quantitatively by QontraXt software.All mice were sacrificed after ultrasonography. Microvessels density (MVD) in the tumors was counted by CD31 staining and the expressions of vascular endothelial growth factor(VEGF) and PDGF were detected by Western Blot.
Results:PTCs in nude mice were enhanced well by PDGFRα-targeted ultrasound contrast agent or blank micro-bubbles. The peak of tumors in siRNA-PDGF group was significantly lower than that in the normal group [(43.085±13.244)% vs (57.428±10.952)%, P=0.004]; MVD of the siRNA-PDGF group was significantly less than that of the normal group [(23.200±6.017)strips/view vs (35.000±8.456)strips/view, P=0.012]. The protein expression of PDGF and VEGF in siRNA-PDGF group were significantly lower than those in the normal group, respectively (0.142±0.058 vs 0.269±0.102, P=0.002; 0.096±0.036 vs 0.158±0.072, P=0.016).
Conclusions:PDGF plays an important role in angiogenesis of PTC, it maybe a new ultrasound molecular imaging method for monitoring tumor angiogenesis.
