目的分析口腔鳞状细胞癌(oral squamous cell carcinomas,OSCC)组织中与受体型蛋白酪氨酸磷酸酶K(receptor protein tyrosine phosphatase-K,PTPRK)相关的胞质活化T细胞核因子c2蛋白(nuclear factor of activated T cells c2,NFATc2)的...目的分析口腔鳞状细胞癌(oral squamous cell carcinomas,OSCC)组织中与受体型蛋白酪氨酸磷酸酶K(receptor protein tyrosine phosphatase-K,PTPRK)相关的胞质活化T细胞核因子c2蛋白(nuclear factor of activated T cells c2,NFATc2)的表达和定位,探讨PTPRK抑制OSCC的潜在机制。方法生物信息学预测与PTPRK相互作用的蛋白,免疫组化检测OSCC组织及相应癌旁口腔黏膜组织(对照组)中NFATc2表达及其与PTPRK的关系,免疫荧光染色检测NFATc2在人正常口腔上皮细胞系HIOEC和OSCC细胞系SCC25中的表达和细胞核定位情况,并分析其蛋白表达与OSCC临床病理特征的关系。结果生物信息学预测结果显示在分子通路方面PTPRK可能与NFATc2关联;与对照组比较,NFATc2在OSCC组织中的表达显著升高(P<0.05),且与PTPRK表达呈负相关(P<0.01);细胞免疫荧光染色结果显示,与人正常口腔上皮细胞系HIOEC比较,OSCC细胞系SCC25中NFATc2表达水平升高且表达入核;OSCC中NFATc2表达与临床分期和病理分级相关(P均<0.05)。结论NFATc2表达增加且入核与PTPRK表达减少相关,并参与OSCC的发生、进展。展开更多
目的构建人T细胞活化核因子C2(NFATc2)基因启动子荧光素酶报告基因载体pGL3-NFATc2-promoter,检测其转录活性,探究二甲双胍和脂多糖对其转录活性的影响。方法利用UCSC网站查找人NFATc2基因的启动子序列并设计上下游引物PCR扩增人NFATc2...目的构建人T细胞活化核因子C2(NFATc2)基因启动子荧光素酶报告基因载体pGL3-NFATc2-promoter,检测其转录活性,探究二甲双胍和脂多糖对其转录活性的影响。方法利用UCSC网站查找人NFATc2基因的启动子序列并设计上下游引物PCR扩增人NFATc2基因启动子片段;用限制性内切酶KpnⅠ和HindⅢ双酶切质粒pGL3-basic,将人NFATc2基因启动子片段插入到pGL3-basic质粒,重组质粒命名为pGL3-NFATc2-promoter。将pGL3-NFATc2-promoter与内参质粒pRL-TK共转染293F细胞,检测其荧光素酶活性。同时构建人NFATc2基因启动子不同片段长度的报告基因载体并进行荧光素酶活性检测,分别给予不同浓度的二甲双胍和脂多糖处理24 h后检测二甲双胍和脂多糖对NFATc2转录活性的影响。进一步突变NFATC2基因启动子上转录因子RUNX2的结合位点探究二甲双胍和脂多糖对NFATc2的转录调控作用。结果研究成功构建了不同片段长度(2170、2077、1802、1651、1083、323 bp)的人NFATC2基因启动子荧光素酶报告基因载体pGL3-NFATc2-promoter,经酶切及测序鉴定完全正确。将不同片段长度的pGL3-NFATc2-promoter转染到293F细胞,发现pGL3-1651 bp具有最高转录活性,荧光素酶活性约为pGL3-2170 bp的3.3倍(1.8433±0.1457 vs 0.5467±0.0850)。中浓度(5 mmol/L)和高浓度(10 mmol/L)的二甲双胍分别上调pGL3-1651 bp的转录活性多达2.5、3倍(1.3467±0.1601 vs 0.8867±0.0321,1.8124±0.2771 vs 0.8867±0.0321)。不同剂量的脂多糖均能上调pGL3-1651 bp的转录活性不低于1.6倍(1.4813±0.0616 vs 0.8867±0.0321)。突变pGL3-1651 bp上的RUNX2结合位点后,二甲双胍和脂多糖上调的pGL3-1651 bp转录活性均受到抑制,转录活性下降(2.1667±0.1527 vs 1.233±0.1155;2.3667±0.2887 vs 1.1333±0.3786)。结论pGL3-NFATc2-promoter在293F细胞中能被转录激活,并证实脂多糖和二甲双胍转录激活pGL3-NFATc2-promoter依赖于转录因RUNX2。展开更多
BACKGROUND We present a case of an EWSR1/FUS::NFATC2 rearranged sarcoma in the left forearm and analyze its clinicopathological and molecular features.CASE SUMMARY The patient is a 23-year-old woman.Microscopically,th...BACKGROUND We present a case of an EWSR1/FUS::NFATC2 rearranged sarcoma in the left forearm and analyze its clinicopathological and molecular features.CASE SUMMARY The patient is a 23-year-old woman.Microscopically,the tumor cells were medium-sized round cells arranged in small nests.The cytoplasm was clear,nuclei were relatively uniform,chromatin was dense,nucleoli were visible,and mitotic figures were rare.Immunohistochemically,the tumor cells were positive for Vimentin,INI-1,CD99,NKX2.2,CyclinD1,friend leukaemia virus integration 1,and NKX3.1.Next-generation sequencing revealed the presence of the EWSR1-NFATC2 fusion gene.EWSR1/FUS::NFATC2 rearranged sarcomas are rare and can easily be misdiagnosed.CONCLUSION Clinical imaging,immunohistochemistry,and molecular pathology should be considered to confirm the diagnosis.展开更多
Objective:To investigate whether cardiac mast cells(MCs)participate in pressure overload-induced myocardial hypertrophy through the regulation of transient receptor potential vanilloid 4(TRPV4).Methods:Pressure overlo...Objective:To investigate whether cardiac mast cells(MCs)participate in pressure overload-induced myocardial hypertrophy through the regulation of transient receptor potential vanilloid 4(TRPV4).Methods:Pressure overload-induced myocardial hypertrophy was induced via abdominal aortic constriction(AAC).Myocardial hypertrophy was evaluated by measuring the heart weight index(HW/BW),lung weight index(LW/BW),ratio of heart weight to tibia length(HW/TL),ratio of lung weight to tibia length(LW/TL),and cross-sectional area of myocardial cells.qRT-PCR was used to detect the mRNA expression of TRPV4.Western blotting was used to detect the protein expression of TRPV4,mast cell tryptase,myosin heavy chain beta(β-MHC),calcineurin A(CnA),and nuclear factor of activated T-cell c3(NFATc3).ELISA was used to measure the levels of brain natriuretic peptide(BNP)and histamine.Fluo4 AM was used to detect the calcium signal in H9c2 myocardial cells.Results:Compared with those of the sham rats,the myocardial mast cells,tryptase,HW/BW,LW/BW,HW/TL,and LW/TL,the cross-sectional area of the myocardial cells,and the expression ofβ-MHC,TRPV4,CnA,and NFATc3 in the myocardial tissue and the serum BNP of the AAC-treated rats increased significantly,whereas the MC stabilizer cromolyn sodium(CS)reversed these indicators.In H9c2 cardiomyocytes,treatment with histamine and the TRPV4 agonist GSK1016790A upregulated the expression of TRPV4,β-MHC,BNP,CnA and NFATc3 and increased calcium ion influx,whereas these effects were inhibited by the H2 receptor inhibitor famotidine and the TRPV4 inhibitor HC067047.Conclusion:Cardiac MCs participate in pressure overload-induced myocardial hypertrophy through the upregulation of TRPV4 via its mediator histamine,and the Ca^(2+)/CnA/NFATc3 signaling pathway is involved in this process.展开更多
文摘目的分析口腔鳞状细胞癌(oral squamous cell carcinomas,OSCC)组织中与受体型蛋白酪氨酸磷酸酶K(receptor protein tyrosine phosphatase-K,PTPRK)相关的胞质活化T细胞核因子c2蛋白(nuclear factor of activated T cells c2,NFATc2)的表达和定位,探讨PTPRK抑制OSCC的潜在机制。方法生物信息学预测与PTPRK相互作用的蛋白,免疫组化检测OSCC组织及相应癌旁口腔黏膜组织(对照组)中NFATc2表达及其与PTPRK的关系,免疫荧光染色检测NFATc2在人正常口腔上皮细胞系HIOEC和OSCC细胞系SCC25中的表达和细胞核定位情况,并分析其蛋白表达与OSCC临床病理特征的关系。结果生物信息学预测结果显示在分子通路方面PTPRK可能与NFATc2关联;与对照组比较,NFATc2在OSCC组织中的表达显著升高(P<0.05),且与PTPRK表达呈负相关(P<0.01);细胞免疫荧光染色结果显示,与人正常口腔上皮细胞系HIOEC比较,OSCC细胞系SCC25中NFATc2表达水平升高且表达入核;OSCC中NFATc2表达与临床分期和病理分级相关(P均<0.05)。结论NFATc2表达增加且入核与PTPRK表达减少相关,并参与OSCC的发生、进展。
文摘目的构建人T细胞活化核因子C2(NFATc2)基因启动子荧光素酶报告基因载体pGL3-NFATc2-promoter,检测其转录活性,探究二甲双胍和脂多糖对其转录活性的影响。方法利用UCSC网站查找人NFATc2基因的启动子序列并设计上下游引物PCR扩增人NFATc2基因启动子片段;用限制性内切酶KpnⅠ和HindⅢ双酶切质粒pGL3-basic,将人NFATc2基因启动子片段插入到pGL3-basic质粒,重组质粒命名为pGL3-NFATc2-promoter。将pGL3-NFATc2-promoter与内参质粒pRL-TK共转染293F细胞,检测其荧光素酶活性。同时构建人NFATc2基因启动子不同片段长度的报告基因载体并进行荧光素酶活性检测,分别给予不同浓度的二甲双胍和脂多糖处理24 h后检测二甲双胍和脂多糖对NFATc2转录活性的影响。进一步突变NFATC2基因启动子上转录因子RUNX2的结合位点探究二甲双胍和脂多糖对NFATc2的转录调控作用。结果研究成功构建了不同片段长度(2170、2077、1802、1651、1083、323 bp)的人NFATC2基因启动子荧光素酶报告基因载体pGL3-NFATc2-promoter,经酶切及测序鉴定完全正确。将不同片段长度的pGL3-NFATc2-promoter转染到293F细胞,发现pGL3-1651 bp具有最高转录活性,荧光素酶活性约为pGL3-2170 bp的3.3倍(1.8433±0.1457 vs 0.5467±0.0850)。中浓度(5 mmol/L)和高浓度(10 mmol/L)的二甲双胍分别上调pGL3-1651 bp的转录活性多达2.5、3倍(1.3467±0.1601 vs 0.8867±0.0321,1.8124±0.2771 vs 0.8867±0.0321)。不同剂量的脂多糖均能上调pGL3-1651 bp的转录活性不低于1.6倍(1.4813±0.0616 vs 0.8867±0.0321)。突变pGL3-1651 bp上的RUNX2结合位点后,二甲双胍和脂多糖上调的pGL3-1651 bp转录活性均受到抑制,转录活性下降(2.1667±0.1527 vs 1.233±0.1155;2.3667±0.2887 vs 1.1333±0.3786)。结论pGL3-NFATc2-promoter在293F细胞中能被转录激活,并证实脂多糖和二甲双胍转录激活pGL3-NFATc2-promoter依赖于转录因RUNX2。
基金Supported by The Shenzhen Science and Technology Program,No.JCYJ20220530144407017.
文摘BACKGROUND We present a case of an EWSR1/FUS::NFATC2 rearranged sarcoma in the left forearm and analyze its clinicopathological and molecular features.CASE SUMMARY The patient is a 23-year-old woman.Microscopically,the tumor cells were medium-sized round cells arranged in small nests.The cytoplasm was clear,nuclei were relatively uniform,chromatin was dense,nucleoli were visible,and mitotic figures were rare.Immunohistochemically,the tumor cells were positive for Vimentin,INI-1,CD99,NKX2.2,CyclinD1,friend leukaemia virus integration 1,and NKX3.1.Next-generation sequencing revealed the presence of the EWSR1-NFATC2 fusion gene.EWSR1/FUS::NFATC2 rearranged sarcomas are rare and can easily be misdiagnosed.CONCLUSION Clinical imaging,immunohistochemistry,and molecular pathology should be considered to confirm the diagnosis.
基金supported by grants from the National Natural Science Foundation of China(No.30872716)the Natural Science Foundation of Hubei Province(No.2015CFB288).
文摘Objective:To investigate whether cardiac mast cells(MCs)participate in pressure overload-induced myocardial hypertrophy through the regulation of transient receptor potential vanilloid 4(TRPV4).Methods:Pressure overload-induced myocardial hypertrophy was induced via abdominal aortic constriction(AAC).Myocardial hypertrophy was evaluated by measuring the heart weight index(HW/BW),lung weight index(LW/BW),ratio of heart weight to tibia length(HW/TL),ratio of lung weight to tibia length(LW/TL),and cross-sectional area of myocardial cells.qRT-PCR was used to detect the mRNA expression of TRPV4.Western blotting was used to detect the protein expression of TRPV4,mast cell tryptase,myosin heavy chain beta(β-MHC),calcineurin A(CnA),and nuclear factor of activated T-cell c3(NFATc3).ELISA was used to measure the levels of brain natriuretic peptide(BNP)and histamine.Fluo4 AM was used to detect the calcium signal in H9c2 myocardial cells.Results:Compared with those of the sham rats,the myocardial mast cells,tryptase,HW/BW,LW/BW,HW/TL,and LW/TL,the cross-sectional area of the myocardial cells,and the expression ofβ-MHC,TRPV4,CnA,and NFATc3 in the myocardial tissue and the serum BNP of the AAC-treated rats increased significantly,whereas the MC stabilizer cromolyn sodium(CS)reversed these indicators.In H9c2 cardiomyocytes,treatment with histamine and the TRPV4 agonist GSK1016790A upregulated the expression of TRPV4,β-MHC,BNP,CnA and NFATc3 and increased calcium ion influx,whereas these effects were inhibited by the H2 receptor inhibitor famotidine and the TRPV4 inhibitor HC067047.Conclusion:Cardiac MCs participate in pressure overload-induced myocardial hypertrophy through the upregulation of TRPV4 via its mediator histamine,and the Ca^(2+)/CnA/NFATc3 signaling pathway is involved in this process.
