BACKGROUND: Gallbladder cancer (GBC) is one of the most aggressive malignant neoplasms with an extremely poor prognosis. Early diagnosis significantly increases the survival rate. The present study was undertaken to e...BACKGROUND: Gallbladder cancer (GBC) is one of the most aggressive malignant neoplasms with an extremely poor prognosis. Early diagnosis significantly increases the survival rate. The present study was undertaken to evaluate the diagnostic and prognostic value of sphingosine-1-phosphate receptor 1 (S1P1) and endoplasmic reticulum protein 29 (ERp29) in benign and malignant gallbladder lesions and to develop a possible alternative treatment for GBC. METHODS: A total of 100 gallbladder adenocarcinoma, 46 peritumoral, 30 gallbladder adenomatous, 15 gallbladder polyp and 35 chronic cholecystitis tissues were included. S1P1 and ERp29 expressions were evaluated by immunohistochemistry The correlation between S1P1 and ERp29 expression and tumor pathological features and prognosis was analyzed. RESULTS: S1P1 positive rate was significantly higher in gallbladder adenocarcinomas than that in peritumoral adenomatous, polyp, and chronic cholecystitis tissues. On the contrary, ERp29 positive rate was significantly lower in adenocarcinomas than that in peritumoral, adenomatous polyp, and chronic cholecystitis tissues. Benign lesions with positive S1P1 or negative ERp29 expression showed moderate or severe atypical hyperplasia in the gallbladder epithelium The overexpression of S1P1 or non-expression of ERp29 was significantly associated with tumor differentiation, tumor mass, lymph node metastasis, and adenocarcinoma invasion Univariate Kaplan-Meier analysis showed that the elevated S1P1 (P=0.008) or absence of ERp29 (P=0.043) was closely associated with decreased survival rate. Multivariate Cox regression analysis showed that S1P1 positive (P=0.004) or ERp29 negative (P=0.029) was an independent predictor of poor prognosis in gallbladder adenocarcinoma.CONCLUSION: S1P1 overexpression or ERp29 absence is related to the carcinogenesis and progression, and may be potential biomarkers for early detection of gallbladder adenocarcinoma.展开更多
目的:通过构建FoxO1表达和干扰慢病毒载体,建立细胞内FoxO1-KLF2-S1P1信号通路调控研究模型,观察FoxO1过表达、干扰表达在Jurkat细胞内对其下游分子表达及功能的影响。方法:构建FoxO1表达和干扰表达慢病毒载体,分别感染Jurkat细胞,采用...目的:通过构建FoxO1表达和干扰慢病毒载体,建立细胞内FoxO1-KLF2-S1P1信号通路调控研究模型,观察FoxO1过表达、干扰表达在Jurkat细胞内对其下游分子表达及功能的影响。方法:构建FoxO1表达和干扰表达慢病毒载体,分别感染Jurkat细胞,采用荧光定量PCR、Western blot和流式细胞术检测S1P1、CD62L、CCR7、CD69 mRNA水平和蛋白分子的表达。结果:FoxO1过表达组于感染后120 h FoxO1、KLF2、S1P1和CD62L mRNA水平显著增高(P<0.05),FoxO1、FoxO1-p和KLF2胞浆蛋白水平增高,S1P1^+细胞和CD62L^+细胞比率增高(P<0.05),CCR7^+细胞和CD69^+细胞未见显著改变(P>0.05)。FoxO1干扰组于转染后120 h FoxO1、KLF2、S1P1和CD62L mRNA水平降低(P<0.05),FoxO1、FoxO1-p和KLF2胞浆蛋白水平低于对照组,S1P1^+细胞百分比增多(P<0.05),但S1P1^+细胞和CD62L^+细胞在72 h时减少(P<0.05)。结论:FoxO1表达和干扰慢病毒载体转染Jurkat细胞并调节KLF2、S1P1和CD62L等分子的表达,为开展细胞内FoxO1-KLF2-S1P1信号通路调控和细胞相关功能的研究打下了基础。展开更多
Psoriasis is characterized by abnormal proliferation of keratinocytes,as well as infiltration of immune cells into the dermis and epidermis,causing itchy,scaly and erythematous plaques of skin.The understanding of thi...Psoriasis is characterized by abnormal proliferation of keratinocytes,as well as infiltration of immune cells into the dermis and epidermis,causing itchy,scaly and erythematous plaques of skin.The understanding of this chronic inflammatory skin disease remains unclear and all available treatments have their limitations currently.Here,we showed that IMMH002,a novel orally active S1 P1 modulator,desensitized peripheral pathogenic lymphocytes to egress signal from secondary lymphoid organs and thymus.Using different psoriasis animal models,we demonstrated that IMMH002 could significantly relieve skin damage as revealed by PAS I score and pathological injure evaluation.Mechanistically,IMMH002 regulated CD3+T lymphocytes re-distribution by inducing lymphocytes’homing,thus decreased T lymphocytes allocation in the peripheral blood and skin but increased in the thymus.Our results suggest that the novel SIP1 agonist,IMMH002,exert extraordinary capacity to rapidly modulate T lymphocytes distribution,representing a promising drug candidate for psoriasis treatment.展开更多
Objective To study the role and mechanism of sphingosine-phosphate(S1P)/sphingosine-1-phosphate receptor 1(S1P1)signal pathway during post conditioning of hypertrophic cardiomyocytes.Methods Neonatal rat cardiomyocyte...Objective To study the role and mechanism of sphingosine-phosphate(S1P)/sphingosine-1-phosphate receptor 1(S1P1)signal pathway during post conditioning of hypertrophic cardiomyocytes.Methods Neonatal rat cardiomyocytes were isolated and cultured,then stimulated by norepinephrine(NE)to induce cardiomyocytes hypertrophy.Using tri-gas incubator to create展开更多
基金supported by grants from the National Science Foundation of China (No. 81410292)the Natural Science Foundation of Hunan Province (No. 09JJ3077)
文摘BACKGROUND: Gallbladder cancer (GBC) is one of the most aggressive malignant neoplasms with an extremely poor prognosis. Early diagnosis significantly increases the survival rate. The present study was undertaken to evaluate the diagnostic and prognostic value of sphingosine-1-phosphate receptor 1 (S1P1) and endoplasmic reticulum protein 29 (ERp29) in benign and malignant gallbladder lesions and to develop a possible alternative treatment for GBC. METHODS: A total of 100 gallbladder adenocarcinoma, 46 peritumoral, 30 gallbladder adenomatous, 15 gallbladder polyp and 35 chronic cholecystitis tissues were included. S1P1 and ERp29 expressions were evaluated by immunohistochemistry The correlation between S1P1 and ERp29 expression and tumor pathological features and prognosis was analyzed. RESULTS: S1P1 positive rate was significantly higher in gallbladder adenocarcinomas than that in peritumoral adenomatous, polyp, and chronic cholecystitis tissues. On the contrary, ERp29 positive rate was significantly lower in adenocarcinomas than that in peritumoral, adenomatous polyp, and chronic cholecystitis tissues. Benign lesions with positive S1P1 or negative ERp29 expression showed moderate or severe atypical hyperplasia in the gallbladder epithelium The overexpression of S1P1 or non-expression of ERp29 was significantly associated with tumor differentiation, tumor mass, lymph node metastasis, and adenocarcinoma invasion Univariate Kaplan-Meier analysis showed that the elevated S1P1 (P=0.008) or absence of ERp29 (P=0.043) was closely associated with decreased survival rate. Multivariate Cox regression analysis showed that S1P1 positive (P=0.004) or ERp29 negative (P=0.029) was an independent predictor of poor prognosis in gallbladder adenocarcinoma.CONCLUSION: S1P1 overexpression or ERp29 absence is related to the carcinogenesis and progression, and may be potential biomarkers for early detection of gallbladder adenocarcinoma.
文摘目的:通过构建FoxO1表达和干扰慢病毒载体,建立细胞内FoxO1-KLF2-S1P1信号通路调控研究模型,观察FoxO1过表达、干扰表达在Jurkat细胞内对其下游分子表达及功能的影响。方法:构建FoxO1表达和干扰表达慢病毒载体,分别感染Jurkat细胞,采用荧光定量PCR、Western blot和流式细胞术检测S1P1、CD62L、CCR7、CD69 mRNA水平和蛋白分子的表达。结果:FoxO1过表达组于感染后120 h FoxO1、KLF2、S1P1和CD62L mRNA水平显著增高(P<0.05),FoxO1、FoxO1-p和KLF2胞浆蛋白水平增高,S1P1^+细胞和CD62L^+细胞比率增高(P<0.05),CCR7^+细胞和CD69^+细胞未见显著改变(P>0.05)。FoxO1干扰组于转染后120 h FoxO1、KLF2、S1P1和CD62L mRNA水平降低(P<0.05),FoxO1、FoxO1-p和KLF2胞浆蛋白水平低于对照组,S1P1^+细胞百分比增多(P<0.05),但S1P1^+细胞和CD62L^+细胞在72 h时减少(P<0.05)。结论:FoxO1表达和干扰慢病毒载体转染Jurkat细胞并调节KLF2、S1P1和CD62L等分子的表达,为开展细胞内FoxO1-KLF2-S1P1信号通路调控和细胞相关功能的研究打下了基础。
基金supported by the CAMS Innovation Fund for Medical Sciences(2016-I2M-3-008,China)National Natural Science Foundation of China(NSFC Nos.81872923 and 81473096)+1 种基金Beijing Natural Science Foundation(No.7172140,China)The Drug Innovation Major Project(No.2018ZX09711001-003,China).
文摘Psoriasis is characterized by abnormal proliferation of keratinocytes,as well as infiltration of immune cells into the dermis and epidermis,causing itchy,scaly and erythematous plaques of skin.The understanding of this chronic inflammatory skin disease remains unclear and all available treatments have their limitations currently.Here,we showed that IMMH002,a novel orally active S1 P1 modulator,desensitized peripheral pathogenic lymphocytes to egress signal from secondary lymphoid organs and thymus.Using different psoriasis animal models,we demonstrated that IMMH002 could significantly relieve skin damage as revealed by PAS I score and pathological injure evaluation.Mechanistically,IMMH002 regulated CD3+T lymphocytes re-distribution by inducing lymphocytes’homing,thus decreased T lymphocytes allocation in the peripheral blood and skin but increased in the thymus.Our results suggest that the novel SIP1 agonist,IMMH002,exert extraordinary capacity to rapidly modulate T lymphocytes distribution,representing a promising drug candidate for psoriasis treatment.
文摘Objective To study the role and mechanism of sphingosine-phosphate(S1P)/sphingosine-1-phosphate receptor 1(S1P1)signal pathway during post conditioning of hypertrophic cardiomyocytes.Methods Neonatal rat cardiomyocytes were isolated and cultured,then stimulated by norepinephrine(NE)to induce cardiomyocytes hypertrophy.Using tri-gas incubator to create
