Liver cancer is a prevalent malignant cancer,ranking third in terms of mortality rate.Metastasis and recurrence primarily contribute to the high mortality rate of liver cancer.Hepatocellular carcinoma(HCC)has low expr...Liver cancer is a prevalent malignant cancer,ranking third in terms of mortality rate.Metastasis and recurrence primarily contribute to the high mortality rate of liver cancer.Hepatocellular carcinoma(HCC)has low expression of focal adhesion kinase(FAK),which increases the risk of metastasis and recurrence.Nevertheless,the efficacy of FAK phosphorylation inhibitors is currently limited.Thus,investigating the mechanisms by which FAK affects HCC metastasis to develop targeted therapies for FAK may present a novel strategy to inhibit HCC metastasis.This study examined the correlation between FAK expression and the prognosis of HCC.Additionally,we explored the impact of FAK degradation on HCC metastasis through wound healing experiments,transwell invasion experiments,and a xenograft tumor model.The expression of proteins related to epithelial-mesenchymal transition(EMT)was measured to elucidate the underlying mechanisms.The results showed that FAK PROTAC can degrade FAK,inhibit the migration and invasion of HCC cells in vitro,and notably decrease the lung metastasis of HCC in vivo.Increased expression of E-cadherin and decreased expression of vimentin indicated that EMT was inhibited.Consequently,degradation of FAK through FAK PROTAC effectively suppressed liver cancer metastasis,holding significant clinical implications for treating liver cancer and developing innovative anti-neoplastic drugs.展开更多
Background:Inhibitor of NF-κB kinase-interacting protein(IKIP)is known to promote proliferation of glioblastoma(GBM)cells,but how it affects migration and invasion by those cells is unclear.Methods:We compared levels...Background:Inhibitor of NF-κB kinase-interacting protein(IKIP)is known to promote proliferation of glioblastoma(GBM)cells,but how it affects migration and invasion by those cells is unclear.Methods:We compared levels of IKIP between glioma tissues and normal brain tissue in clinical samples and public databases.We examined the effects of IKIP overexpression and knockdown on the migration and invasion of GBM using transwell and wound healing assays,and we compared the transcriptomes under these different conditions to identify the molecular mechanisms involved.Results:Based on data from our clinical samples and from public databases,IKIP was overexpressed in GBM tumors,and its expression level correlated inversely with survival.IKIP overexpression in GBM cells inhibited migration and invasion in transwell and wound healing assays,whereas IKIP knockdown exerted the opposite effects.IKIP overexpression in GBM cells that were injected into mouse brain promoted tumor growth but inhibited tumor invasion of surrounding tissue.The effects of IKIP were associated with downregulation of THBS1 mRNA and concomitant inhibition of THBS1/FAK signaling.Conclusions:IKIP inhibits THBS1/FAK signaling to suppress migration and invasion of GBM cells.展开更多
目的观察化痰消瘀方对胃癌前病变大鼠PTEN、FAK及paxillin表达的影响,从分子生物学水平探讨其逆转胃癌前病变的作用机制。方法选择90只4~5周龄SD雄性大鼠,随机取15只作为空白组,其余大鼠均采用N-甲基-N’-硝基N-亚硝基胍综合饥饱失常、...目的观察化痰消瘀方对胃癌前病变大鼠PTEN、FAK及paxillin表达的影响,从分子生物学水平探讨其逆转胃癌前病变的作用机制。方法选择90只4~5周龄SD雄性大鼠,随机取15只作为空白组,其余大鼠均采用N-甲基-N’-硝基N-亚硝基胍综合饥饱失常、浓盐水灌胃的方法制备胃癌前病变大鼠模型。将造模成功大鼠随机分为模型组,中药高、中、低剂量组及维酶素组,每组13只。空白组正常饮食,余均造模成功后,模型组给予生理盐水灌胃,中药高、中、低剂量组分别给予3 m L/kg、2 m L/kg、1 m L/kg化痰消瘀方灌胃,维酶素组给予10 m L/kg维酶素灌胃,均灌胃8周。采用HE染色法观察大鼠胃黏膜病理改变情况,应用免疫组化法检测胃黏膜组织中PTEN、FAK及paxillin的表达情况。结果 HE染色显示空白组大鼠胃黏膜无癌前病变改变,模型组均出现不同程度的胃癌前病变改变,中药高、中剂量组和维酶素组胃黏膜癌前病变情况均较模型组明显改善（P均〈0.05）,且中药高剂量组改善程度高于其他各给药组（P均〈0.05）。免疫组化结果显示PTEN在空白组强阳性表达;模型组鲜有表达;中药高、中、低剂量组表达量逐渐降低,但高于模型组（P均〈0.05）;中药高剂量组PTEN表达量高于其他各给药组（P均〈0.05）。FAK、paxillin在空白组极少表达,模型组表达量较空白组显著增加（P均〈0.05）;中药高、中、低剂量组二者表达量均明显低于模型组（P均〈0.05）,其中高剂量组表达量明显低于其他各给药组（P均〈0.05）。结论中药化痰消瘀方可显著改善胃癌前病变大鼠胃黏膜组织病理学情况,其作用机制可能是激活抑癌基因PTEN,调节FAK的去磷酸化,通过FAK/Src信号通路下调paxillin来诱导细胞凋亡。展开更多
基金supported by the National Natural Science Foundation of China Fund Project(82272956).
文摘Liver cancer is a prevalent malignant cancer,ranking third in terms of mortality rate.Metastasis and recurrence primarily contribute to the high mortality rate of liver cancer.Hepatocellular carcinoma(HCC)has low expression of focal adhesion kinase(FAK),which increases the risk of metastasis and recurrence.Nevertheless,the efficacy of FAK phosphorylation inhibitors is currently limited.Thus,investigating the mechanisms by which FAK affects HCC metastasis to develop targeted therapies for FAK may present a novel strategy to inhibit HCC metastasis.This study examined the correlation between FAK expression and the prognosis of HCC.Additionally,we explored the impact of FAK degradation on HCC metastasis through wound healing experiments,transwell invasion experiments,and a xenograft tumor model.The expression of proteins related to epithelial-mesenchymal transition(EMT)was measured to elucidate the underlying mechanisms.The results showed that FAK PROTAC can degrade FAK,inhibit the migration and invasion of HCC cells in vitro,and notably decrease the lung metastasis of HCC in vivo.Increased expression of E-cadherin and decreased expression of vimentin indicated that EMT was inhibited.Consequently,degradation of FAK through FAK PROTAC effectively suppressed liver cancer metastasis,holding significant clinical implications for treating liver cancer and developing innovative anti-neoplastic drugs.
基金supported by the National Natural Science Foundation of China(82002638)the National Natural Science Foundation of Sichuan Province(2023NSFSC0734).
文摘Background:Inhibitor of NF-κB kinase-interacting protein(IKIP)is known to promote proliferation of glioblastoma(GBM)cells,but how it affects migration and invasion by those cells is unclear.Methods:We compared levels of IKIP between glioma tissues and normal brain tissue in clinical samples and public databases.We examined the effects of IKIP overexpression and knockdown on the migration and invasion of GBM using transwell and wound healing assays,and we compared the transcriptomes under these different conditions to identify the molecular mechanisms involved.Results:Based on data from our clinical samples and from public databases,IKIP was overexpressed in GBM tumors,and its expression level correlated inversely with survival.IKIP overexpression in GBM cells inhibited migration and invasion in transwell and wound healing assays,whereas IKIP knockdown exerted the opposite effects.IKIP overexpression in GBM cells that were injected into mouse brain promoted tumor growth but inhibited tumor invasion of surrounding tissue.The effects of IKIP were associated with downregulation of THBS1 mRNA and concomitant inhibition of THBS1/FAK signaling.Conclusions:IKIP inhibits THBS1/FAK signaling to suppress migration and invasion of GBM cells.
文摘目的观察化痰消瘀方对胃癌前病变大鼠PTEN、FAK及paxillin表达的影响,从分子生物学水平探讨其逆转胃癌前病变的作用机制。方法选择90只4~5周龄SD雄性大鼠,随机取15只作为空白组,其余大鼠均采用N-甲基-N’-硝基N-亚硝基胍综合饥饱失常、浓盐水灌胃的方法制备胃癌前病变大鼠模型。将造模成功大鼠随机分为模型组,中药高、中、低剂量组及维酶素组,每组13只。空白组正常饮食,余均造模成功后,模型组给予生理盐水灌胃,中药高、中、低剂量组分别给予3 m L/kg、2 m L/kg、1 m L/kg化痰消瘀方灌胃,维酶素组给予10 m L/kg维酶素灌胃,均灌胃8周。采用HE染色法观察大鼠胃黏膜病理改变情况,应用免疫组化法检测胃黏膜组织中PTEN、FAK及paxillin的表达情况。结果 HE染色显示空白组大鼠胃黏膜无癌前病变改变,模型组均出现不同程度的胃癌前病变改变,中药高、中剂量组和维酶素组胃黏膜癌前病变情况均较模型组明显改善（P均〈0.05）,且中药高剂量组改善程度高于其他各给药组（P均〈0.05）。免疫组化结果显示PTEN在空白组强阳性表达;模型组鲜有表达;中药高、中、低剂量组表达量逐渐降低,但高于模型组（P均〈0.05）;中药高剂量组PTEN表达量高于其他各给药组（P均〈0.05）。FAK、paxillin在空白组极少表达,模型组表达量较空白组显著增加（P均〈0.05）;中药高、中、低剂量组二者表达量均明显低于模型组（P均〈0.05）,其中高剂量组表达量明显低于其他各给药组（P均〈0.05）。结论中药化痰消瘀方可显著改善胃癌前病变大鼠胃黏膜组织病理学情况,其作用机制可能是激活抑癌基因PTEN,调节FAK的去磷酸化,通过FAK/Src信号通路下调paxillin来诱导细胞凋亡。
