Colorectal cancer (CRC) ranks the fourth of the mortality rates of malignancies worldwide with poor prognosis. 5-hydroxytryptamine receptors (5-HTRs) are recently found to be implicated in carcinogenesis. Our team has preliminarily determined that 5-HTR1D played a role in the process of CRC and inhibited cell migration and invasion. Zuo Jin Wan (ZJW), a traditional Chinese medicine (TCM) formula, has been shown to have anticancer activities, but the mechanism is still unclear. Our project is planned to discover the molecular mechanism that 5-HTR1D plays a role in progression of CRC through regulation of the Wnt/β-catenin signaling pathway, then determind the positive effection of ZJW treating CRC through attenuation of 5-HTR1D-Wnt/β-catenin signaling pathway, and then confirm the therapeutic effect of ZJW through subcutaneously implanted tumor model in nude mouse. Our project is expected to find new mechanism of CRC carcinogenesis, and provide basic data for ZJW in CRC treatment, thus to enhance the clinical effect of traditional Chinese medicine in CRC prevention and treatment.
结直肠癌(colorectal cancer, CRC)的全球癌症死亡率位列第四,预后不理想。新近研究发现,5-羟色胺受体(5-HT receptors, 5-HTRs)具有促进肿瘤细胞生长的作用。课题组前期研究初步证实5-HTR1D在CRC具有差异性表达,调控5-HTR1D能影响Wnt/β-catenin 信号通路传递,影响细胞侵袭和转移。左金丸(Zuo jin wan, ZJW)是中医经典方剂,已有报道其对CRC有抑制作用,但机制并不明确。本课题拟采用体内外实验相结合的方法,发现5-HTR1D通过Wnt/β-catenin通路影响CRC发展的分子机制,证实经典中药ZJW通过下调5-HTR1D表达影响Wnt/β-catenin通路发挥对CRC的调控作用,并通过SW403 裸鼠皮下移植瘤模型治疗实验加以验证。预期本研究将揭示CRC发生发展的新机制,为ZJW在CRC治疗中的应用提供实验依据。
结直肠癌(colorectal cancer, CRC)的全球癌症死亡率位列第四,预后不理想。近年来研究发现,5-羟色胺受体(5-HT receptors, 5-HTRs)具有促进肿瘤细胞生长的作用。课题组前期研究初步证实5-HTR1D在CRC具有差异性表达,调控5-HTR1D能影响Wnt/β-catenin 信号通路传递,影响细胞侵袭和转移。左金丸(Zuo jin wan, ZJW)是中医经典方剂,已有报道其对CRC有抑制作用,但机制并不明确。本课题在体外实验中使用5-HTR1D激动剂和抑制剂分别干预CRC细胞株HT-29和SW403,发现调控5-HTR1D可影响细胞增殖、促进细胞凋亡以及抑制侵袭和转移,影响β-catenin在细胞核和细胞浆间转运,提示调控5-HTR1D可影响Wnt/β-catenin通路传导,从而影响CRC进展;使用经典中药ZJW干预SW403细胞后,显示ZJW可下调5-HTR1D表达,并抑制Wnt/β-catenin通路传导,与对照组比较存在显著性差异(P<0.05),提示ZJW可影响Wnt/β-catenin通路从而发挥对CRC的抑制作用。在体内实验中,使用SW403细胞株制作裸鼠皮下移植瘤模型,运用ZJW进行干预,选择5-氟尿嘧啶(Fluorouracil,5-FU)为对照,结果显示ZJW组和ZJW+5-FU组瘤体组织5-HTR1D表达显著减少,β-catenin在细胞核内表达显著减少,Axin1表达增加,p-GSK-3β、Dvl2、Dvl3、LEF1及TCF4表达均减少(P均<0.05),初步验证了ZJW可抑制经典Wnt/β-catenin通路传导,证实ZJW通过下调5-HTR1D-Wnt/β-catenin信号通路产生对CRC抑制作用,揭示CRC发生发展的新机制,为ZJW在CRC治疗中的应用提供了实验依据。
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数据更新时间:2023-05-31
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