1.北京中医药大学,北京 100029
2.首都医科大学附属北京中医医院肿瘤科,北京 100010
左曦,女,29岁,博士研究生。研究方向:中西医结合防治恶性肿瘤。
张甘霖,E-mail:kalinezhang@163.com
收稿:2025-10-30,
纸质出版:2026-04-25
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左曦,王笑民,南凌杉,等.基于VEGF/ANG通路探究固本抑瘤Ⅱ号对三阴性乳腺癌术后自发肺转移的作用机制[J].北京中医药,2026,45(4):452-460.
ZUO Xi,WANG Xiaomin,NAN Lingshan,et al.Mechanisms of Guben Yiliu No. 2 in inhibiting postoperative lung metastasis of triple-negative breast cancer mice via the VEGF/ANG pathway[J]. Beijing Journal of Traditional Chinese Medicine,2026,45(04):452-460.
左曦,王笑民,南凌杉,等.基于VEGF/ANG通路探究固本抑瘤Ⅱ号对三阴性乳腺癌术后自发肺转移的作用机制[J].北京中医药,2026,45(4):452-460. DOI: 10.16025/j.1674-1307.2026.04.005.
ZUO Xi,WANG Xiaomin,NAN Lingshan,et al.Mechanisms of Guben Yiliu No. 2 in inhibiting postoperative lung metastasis of triple-negative breast cancer mice via the VEGF/ANG pathway[J]. Beijing Journal of Traditional Chinese Medicine,2026,45(04):452-460. DOI: 10.16025/j.1674-1307.2026.04.005.
目的
2
探究固本抑瘤Ⅱ号通过血管内皮生长因子/血管生成素(VEGF/ANG)通路减少肿瘤血管生成,进而抑制三阴性乳腺癌(TNBC)小鼠术后肺转移的作用和机制。
方法
2
将25只雌性Balb/c小鼠,随机分为空白组、模型组、术后中药组、全程中药组、表柔比星组,每组5只。采用4T1-luciferase细胞第4乳垫原位接种+术后切除原位瘤法构建TNBC术后自发肺转移模型,术后中药组于术后第3天,全程中药组于接种后第3天开始用固本抑瘤Ⅱ号[60 mL/(kg·d)]灌胃,表柔比星组腹腔注射表柔比星(0.003 g/kg,1周2次),空白组与模型组给予等体积生理盐水。通过小动物活体可见光成像、micro-CT评估肺转移情况。免疫组织化学血小板内皮细胞黏附分子-1/过碘酸-雪夫染色(CD31/PAS)检测血管生成拟态;蛋白免疫印迹检测肺组织血管内皮生长因子A(VEGFA)、血管生成素-1(ANG1)、血管生成素-2(ANG2)、酪氨酸激酶受体2(Tie2)等蛋白表达;酶联免疫吸附试验(ELISA)检测血清VEGF水平;免疫荧光检测肺组织紧密连接蛋白-1(claudin-1)表达。通过体外肺微血管内皮细胞(PMVEC)与4T1细胞共培养,检测细胞成管能力及血管通透性。
结果
2
与模型组比较,全程中药组肺转移灶荧光强度、肺质量及肺指数均显著降低(
P
<
0.05),肺组织MVD、VM密度显著下降(
P
<
0.05),claudin-1荧光强度显著增强(
P
<
0.05);血清VEGF及肺组织VEGFA、ANG2蛋白表达显著下调(
P
<
0.05),ANG1及Tie2表达呈上升趋势。体外实验中,固本抑瘤Ⅱ号显著抑制PMVEC成管结构数、成管长度及节点数(
P
<
0.05),降低FITC-葡聚糖渗漏量(
P
<
0.05),而表柔比星反而增加其渗透量。
结论
2
固本抑瘤Ⅱ号可有效抑制TNBC小鼠术后肺转移,其机制可能是通过调控VEGF/ANG通路,抑制肿瘤血管生成、降低肺微血管通透性,从而阻止转移前生态位形成。
Objective To investigate the effects and mechanisms of
Guben Yiliu
No. 2 in inhibiting postoperative lung metastasis of triple-negative breast cancer (TNBC) in mice by reducing tumor angiogenesis through the vascular endothelial growth factor/angiopoietin (VEGF/ANG) pathway. Methods Twenty-five female BALB/c mice were randomly divided into a blank group, model group, postoperative traditional Chinese medicine (TCM) group, whole-course TCM group, and epirubicin group, with 5 mice in each group. A spontaneous postoperative lung metastasis model of TNBC was established by orthotopic inoculation of 4T1-luciferase cells into the fourth mammary fat pad followed by surgical resection of the primary tumor. The postoperative TCM group received
Guben Yiliu
No. 2 (60 mL/kg•d) by gavage starting on postoperative day 3, while the whole-course TCM group received the same treatment beginning on day 3 after tumor inoculation. The epirubicin group received intraperitoneal injections of epirubicin (0.003 g/kg, twice weekly). The blank and model groups received equal volumes of normal saline. Lung metastasis was evaluated by small-animal in vivo bioluminescence imaging and micro-CT. Vasculogenic mimicry (VM) was detected by immunohistochemical staining for platelet endothelial cell adhesion molecule-1/periodic acid-Schiff (CD31/PAS). Protein expression levels of vascular
endothelial growth factor A (VEGFA), angiopoietin-1 (ANG1), angiopoietin-2 (ANG2), and tyrosine kinase receptor 2 (Tie2) in lung tissue were detected by Western blot. Serum VEGF levels were measured by enzyme-linked immunosorbent assay (ELISA). Expression of the tight junction protein-1 (claudin-1) in lung tissue was detected by immunofluorescence. In vitro, pulmonary microvascular endothelial cells (PMVECs) were co-cultured with 4T1 cells to evaluate tube formation ability and vascular permeability. Results Compared with the model group, the whole-course TCM group showed significantly reduced fluorescence intensity of lung metastatic lesions, lung weight, and lung index (
P
<
0.05), significantly decreased microvessel density (MVD) and VM density in lung tissue (
P
<
0.05), and significantly enhanced claudin-1 fluorescence intensity (
P
<
0.05). Serum VEGF levels and protein expression levels of VEGFA and ANG2 in lung tissue were significantly downregulated (
P
<
0.05), whereas ANG1 and Tie2 expression levels showed an upward trend. In vitro experiments demonstrated that
Guben Yiliu
No. 2 significantly inhibited the number of PMVEC tube structures, tube length, and node number (
P
<
0.05), and reduced FITC-dextran leakage (
P
<
0.05), whereas epirubicin increased vascular permeability. Conclusion
Guben Yiliu
No. 2 effectively inhibits postoperative lung metastasis in TNBC mice. The underlying mechanism may involve regulation of the VEGF/ANG pathway, inhibition of tumor angiogenesis, and reduction of pulmonary microvascular permeability, thereby preventing the formation of the premetastatic niche.
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