基于CiteSpace及VOSviewer的乳腺癌微环境研究热点可视化分析

目的基于知识图谱探析乳腺癌微环境的研究现状,并预测未来研究热点。方法检索中国知网及Web of Science Core Collection数据库近20年乳腺癌微环境相关文献,并运用CiteSpace、VOSviewer等软件进行文献计量学分析。结果共检索到中文文献825篇,英文文献16221篇。可视化分析显示科研人员的研究重点逐渐从细胞研究转向分子方向及药物创新层面,肿瘤干细胞、PD-1、PD-L1、免疫检查点抑制剂、纳米颗粒等是目前乳腺癌微环境研究的热点。美国乳腺癌微环境的相关研究最多,其次为中国、意大利。结论目前的研究热点主要集中在肿瘤细胞干性、免疫治疗、纳米递送等领域。随着对该领域研究的不断深入,通过靶向乳腺癌微环境预防肿瘤发展及转移,改善肿瘤预后成为新的研究趋势。

人乳腺癌相关成纤维细胞对MDA-MB-231细胞的影响

目的探讨人乳腺癌相关成纤维(cancer associated fibroblasts,CAFs)细胞对MDA-MB-231细胞生长、增殖和侵袭的影响。方法实验分2组:MDA-MB-231细胞单独培养组(对照组)和MDA-MB-231与CAFs细胞共培养组(实验组)。以细胞计数法观察人乳腺癌CAFs细胞对MDA-MB-231细胞生长的影响;运用流式细胞术检测人乳腺癌CAFs细胞对MDA-MB-231细胞周期的影响;采用条件培养基,通过Transwell小室侵袭实验观察人乳腺癌CAFs细胞对MDA-MB-231细胞侵袭能力的影响。结果与对照组比较,实验组MDA-MB-231细胞的生长速度明显增强(P<0.05),细胞周期S期细胞百分比[(32.35±4.50)%]和细胞增殖指数PI[(42.91±2.44)%]明显增高(P<0.05);在CAFs细胞的条件培养基下,MDA-MB-231细胞的侵袭能力明显增强(P<0.01)。结论人乳腺癌CAFs细胞能够显著促进MDA-MB-231细胞的生长、增殖和侵袭。

STAT3 activation of tumor-associated macrophages is associated with cytokines of tumor microenvironment and prognostic factors in breast cancer

Objective:The aim of this study was to investigate the correlation of STAT3 activation of tumor-associated macrophages(TAMs) and local cytokines(IL-1β,TNF-α,TGF-β and IL-12) and prognostic factors in breast cancer.Methods:TAMs in 50 primary breast cancers and macrophages in 15 normal breasts were examined by immunohistochemistry.And STAT3 DNA-binding activity of TAMs in 33/50 primary breast cancers was measured by transcription factor DNA-binding ELISA.In addition,the concentrations of IL-1β,TNF-α,TGF-β and IL-12 were measured in the 33 primary breast cancers extracts by ELISA.The correlation between STAT3 activity of TAMs and concentrations of IL-1β,TNF-α,TGF-β and IL-12 were analyzed.The correlation between STAT3 activity of TAMs and conventional clinicopathologic parameters were also evaluated.Results:The macrophages density showed a significant increase in primary breast cancers compared to normal breasts.STAT3 DNA-binding activity of TAMs in breast cancer was significantly higher than that of monocytes/macrophages from peripheral blood of the patients.Furthermore,STAT3 activity of TAMs was correlated significantly with the levels of IL-1β,TNF-α and TGF-β in breast cancer tissues.But an inverse association was observed between STAT3 activity of TAMs and IL-12.In addition,STAT3 activity of TAMs was higher in high histological type than in low histological type,and STAT3 activity of TAMs was higher in CerBb-2 positive than CerBb-2 negative.Conclusion:STAT3 activation of TAMs may be associate with increasing of IL-1β,TNF-α and TGF-β and decreasing of IL-12 in breast cancer.STAT3 activation of TAMs may also be correlated with histological grade and CerBb-2 status of breast cancer.