AIM： To explore the anti-fibrotic effect of Oxymatrine on CCl4-induced liver fibrosis in rats and its modulation on the TGFbeta-Smad signaling pathway. METHODS： One hundred healthy male SD rats were randomly divided...AIM： To explore the anti-fibrotic effect of Oxymatrine on CCl4-induced liver fibrosis in rats and its modulation on the TGFbeta-Smad signaling pathway. METHODS： One hundred healthy male SD rats were randomly divided into three groups： normal group （n = 20）, treatment group of Oxymatrine （n = 40） and CCh-induced fibrosis group （n = 40）. Experimental hepatic fibrosis was induced by subcutaneous injection of carbon tetrachloride （CCh soluted in liquid paraffin with the concentration of 300 g/L, the dosage of injection was 3 mL/kg, twice per week for 8 wk）. The treated rats received Oxymatrine via celiac injection at a dosage of 10 mg/kg twice a week at the same time. The deposition of collagen was observed with H＆E and Masson staining. The concentration of serum TGF-β1 was assayed with ELISA. The gene expression of Smads and CBP （CREB binding protein） was detected with in situ hybridization （ISH） and immunohistochemistry （IH）, respectively. All the experimental figures were scanned and analyzed with special figure-analysis software. RESULTS： A significant reduction of collagen deposition and rearrangement of the parenchyma was noted in the liver tissue of Oxymatrine-treated rats. The semi- quantitative histological scores （2.43 ± 0.47 μm^2 vs 3.76 ±0.68, P 〈 0.05） and average area of collagen/in those rats were significantly decreased when compared with hepatic cirrhosis model rats （94.41 ± 37.26 μm^2 vs 290.86 ± 89.37 μm^2, P 〈 0.05）. The gene expression of Smad 3 mRNA was considerably decreased in the treated animals. The A value of Smad 3 mRNA was lower in the treated rats than the model rats （0.034 ± 0.090 vs 0.167 ± 0.092, P 〈 0.05）. Contrarily, the A value of Smad 7 mRNA was increased considerably in the treated animals （0.175 ± 0.065 vs 0.074 vs 0.012, P 〈 0.05）. There was an obvious decrease in the expression of CBP mRNA in treated rats as illuminated by a reduction of its A value when compared with model rats （0.065±0.049 vs 0.235 �展开更多
BACKGROUND:Contrast agents help to improve visibility in magnetic resonance(MR)imaging.However,owing to the large interstitial spaces of the liver,there is a reduction in the natural contrast gradient between lesions ...BACKGROUND:Contrast agents help to improve visibility in magnetic resonance(MR)imaging.However,owing to the large interstitial spaces of the liver,there is a reduction in the natural contrast gradient between lesions and healthy tissue.This study was undertaken to evaluate the efficacy and safety of the liverspecific MR imaging contrast agent gadoxetate disodium(GdEOB-DTPA)in Chinese patients.METHODS:This was a single-arm,open-label,multicenter study in patients with known or suspected focal liver lesions referred for contrast-enhanced MR imaging.MR imaging was performed in 234 patients before and after a single intravenous bolus of Gd-EOB-DTPA(0.025 mmol/kg body weight).Images were evaluated by clinical study investigators and three independent,blinded radiologists.The primary efficacy endpoint was sensitivity in lesion detection.RESULTS:Gd-EOB-DTPA improved sensitivity in lesion detection by 9.46%compared with pre-contrast imaging for the average of the three blinded readers(94.78%vs 85.32%for Gd-EOB-DTPA vs pre-contrast,respectively).Improvements in detection were more pronounced in lesions less than 1cm.Gd-EOB-DTPA improved diagnostic accuracy in lesion classification.CONCLUSIONS:This open-label study demonstrated that Gd-EOB-DTPA improves diagnostic sensitivity in liver lesions,particularly in those smaller than 1 cm.Gd-EOB-DTPA also significantly improves the diagnostic accuracy in lesion classification,and furthermore,Gd-EOB-DTPA is safe in Chinese patients with liver lesions.展开更多
Metastatic human HCC model is needed for the studies on mechanism and intervention of metastatic recurrence. By using orthotopic implantation of histologically intact tissues of 30 surgical specimens, a patient-like m...Metastatic human HCC model is needed for the studies on mechanism and intervention of metastatic recurrence. By using orthotopic implantation of histologically intact tissues of 30 surgical specimens, a patient-like metastatic model of human HCC in nude mice (LCI-D20) and a low metastatic model of human HCC in nude mice (LCI-D35) have been established. All mice with transplanted LCI-D20 tumors exhibited extremely high metastatic ability including spontaneous metastasis to liver, lungs, lymph nodes and peritoneal seeding. Remarkable difference was also found in expression of some of the invasiveness related genes and growth factors between the LCI-D20 and LCI-D35 tumors. PAI-1 increased gradually following tumor progression in LCI-D20 model, and correlated with tumor size and AFP level. Phasic expression of tissue intercellular adhesion molecule-1 in this model was also observed. Using corneal micropocket model, it was demonstrated that the vascular response induced by LCI-D20 tumor was stronger than that induced by LCI-D35 tumor. Similar report on metastatic human HCC model in nude mice and human HCC cell line with metastatic potential was rarely found in the literature. This LCI-D20 model has been widely used for the studies on intervention of metastasis, including anti-angiogenesis,antisense approach, metalloproteinase inhibitor, differentiation inducer, etc. It is concluded that the establishment of metastatic human HCC model in nude mice and human HCC cell line with metastatic potential will provide important models for the in vitro and in vitro study of HCC invasiveness, angiogenesis as well as intervention of HCC recurrence.展开更多
Above- and belowground biomasses of grasslands are important parameters for characterizing re- gional and global carbon cycles in grassland ecosystems. Compared with the relatively detailed in- formation for abovegrou...Above- and belowground biomasses of grasslands are important parameters for characterizing re- gional and global carbon cycles in grassland ecosystems. Compared with the relatively detailed in- formation for aboveground biomass (AGB), belowground biomass (BGB) is poorly reported at the re- gional scales. The present study, based on a total of 113 sampling sites in temperate grassland of the Inner Mongolia, investigated regional distribution patterns of AGB, BGB, vertical distribution of roots, and their relationships with environmental factors. AGB and BGB increased from the southwest to the northeast of the study region. The largest biomass occurred in meadow steppe, with mean AGB and BGB of 196.7 and 1385.2 g/m2, respectively; while the lowest biomass occurred in desert steppe, with an AGB of 56.6 g/m2 and a BGB of 301.0 g/m2. In addition, about 47% of root biomass was distributed in the top 10 cm soil. Further statistical analysis indicated that precipitation was the primary determinant factor in shaping these distribution patterns. Vertical distribution of roots was significantly affected by precipitation, while the effects of soil texture and grassland types were weak.展开更多
针对标准PSO中单一社会学习模式造成的算法容易陷入局部最优和后期收敛速度慢等问题,提出了一种基于多种群的自适应迁移PSO算法(Multi-population based self-adaptive migration PSO,MSMPSO).通过融合两种常用的邻居拓扑结构,赋予个体...针对标准PSO中单一社会学习模式造成的算法容易陷入局部最优和后期收敛速度慢等问题,提出了一种基于多种群的自适应迁移PSO算法(Multi-population based self-adaptive migration PSO,MSMPSO).通过融合两种常用的邻居拓扑结构,赋予个体更多的信息来源;在多个子种群并行进化的基础上,利用不同加速因子的组合赋予各子种群不同的搜索特性,进而通过周期性对子种群的历史性能进行评估,以此为基础指导个体的迁移操作,实现子种群间的协作与计算资源的合理分配,并最终提升算法的综合性能.对CEC2013测试函数的优化结果表明,MSMPSO在求解精度、收敛速度等方面均表现出较好的性能.展开更多
AIM:To compare the effects and postoperative complications between tissue selecting therapy stapler(TST)and Milligan-Morgan hemorrhoidectomy(M-M).METHODS:Four hundred and eighty patients with severe prolapsing hemorrh...AIM:To compare the effects and postoperative complications between tissue selecting therapy stapler(TST)and Milligan-Morgan hemorrhoidectomy(M-M).METHODS:Four hundred and eighty patients with severe prolapsing hemorrhoids,who were admitted to the Shenyang Coloproctology Hospital between 2009and 2012,were randomly divided into observation(n=240)and control(n=240)groups.Hemorrhoidectomies were performed with TST in the observation group and with the M-M technique in the control group.The therapeutic effects,operation security,and postoperative complications in the two groups were compared.The immediate and long-term complications were assessed according to corresponding criteria.Pain was assessed on a visual analogue scale.The efficacy was assessed by specialized criteria.The follow-up was conducted one year after the operation.RESULTS:The total effective rates of the observation and control groups were 99.5%(217/218)and 98.6%(218/221)respectively;the difference was not statistically significant(P=0.322).Their were significant differences between observation and control groups in intraoperative blood loss(5.07±1.14 vs 2.45±0.57,P=0.000),pain(12 h after the surgery:5.08±1.62 vs 7.19±2.01,P=0.000;at first dressing change:2.64±0.87 vs 4.34±1.15,P=0.000;first defecation:3.91±1.47 vs 5.63±1.98,P=0.001),urine retention(n=22 vs n=47,P=0.001),anal pendant expansion after the surgery(2.35±0.56 vs 5.16±1.42,P=0.000),operation time(18.3±5.6 min vs 29.5±8.2 min,P=0.000),and the length of hospital stay(5.3±0.6 d vs 11.4±1.8 d,P=0.000).Moreover TST showed significant reductions compared to M-M in the rates of long-term complications such as fecal incontinence(n=3 vs n=16,P=0.003),difficult bowel movement(n=1 vs n=9,P=0.011),intractable pain(n=2 vs n=12,P=0.007),and anal discharge(n=3 vs n=23,P=0.000).CONCLUSION:TST for severe prolapsing hemorrhoids is a satisfactory technique for more rapid recovery,lower complication rates,and higher operation security.展开更多
Alzheimer’s disease(AD), the most common type of dementia, is becoming a major challenge for global health and social care. However, the current understanding of AD pathogenesis is limited, and no early diagnosis and...Alzheimer’s disease(AD), the most common type of dementia, is becoming a major challenge for global health and social care. However, the current understanding of AD pathogenesis is limited, and no early diagnosis and disease-modifying therapy are currently available. During the past year, significant progress has been made in clinical research on the diagnosis, prevention, and treatment of AD.In this review, we summarize the latest achievements,including diagnostic biomarkers, polygenic hazard score,amyloid and tau PET imaging, clinical trials targeting amyloid-beta(Ab), tau, and neurotransmitters, early intervention, and primary prevention and systemic intervention approaches, and provide novel perspectives for further efforts to understand and cure the disease.展开更多
基金The Applied Basic Research of the ScientificTechnological Department of Sichuan Province, No. 05JY0492
文摘AIM： To explore the anti-fibrotic effect of Oxymatrine on CCl4-induced liver fibrosis in rats and its modulation on the TGFbeta-Smad signaling pathway. METHODS： One hundred healthy male SD rats were randomly divided into three groups： normal group （n = 20）, treatment group of Oxymatrine （n = 40） and CCh-induced fibrosis group （n = 40）. Experimental hepatic fibrosis was induced by subcutaneous injection of carbon tetrachloride （CCh soluted in liquid paraffin with the concentration of 300 g/L, the dosage of injection was 3 mL/kg, twice per week for 8 wk）. The treated rats received Oxymatrine via celiac injection at a dosage of 10 mg/kg twice a week at the same time. The deposition of collagen was observed with H＆E and Masson staining. The concentration of serum TGF-β1 was assayed with ELISA. The gene expression of Smads and CBP （CREB binding protein） was detected with in situ hybridization （ISH） and immunohistochemistry （IH）, respectively. All the experimental figures were scanned and analyzed with special figure-analysis software. RESULTS： A significant reduction of collagen deposition and rearrangement of the parenchyma was noted in the liver tissue of Oxymatrine-treated rats. The semi- quantitative histological scores （2.43 ± 0.47 μm^2 vs 3.76 ±0.68, P 〈 0.05） and average area of collagen/in those rats were significantly decreased when compared with hepatic cirrhosis model rats （94.41 ± 37.26 μm^2 vs 290.86 ± 89.37 μm^2, P 〈 0.05）. The gene expression of Smad 3 mRNA was considerably decreased in the treated animals. The A value of Smad 3 mRNA was lower in the treated rats than the model rats （0.034 ± 0.090 vs 0.167 ± 0.092, P 〈 0.05）. Contrarily, the A value of Smad 7 mRNA was increased considerably in the treated animals （0.175 ± 0.065 vs 0.074 vs 0.012, P 〈 0.05）. There was an obvious decrease in the expression of CBP mRNA in treated rats as illuminated by a reduction of its A value when compared with model rats （0.065±0.049 vs 0.235 �
基金supported by a grant from Bayer HealthCare/Bayer Schering Pharma AG
文摘BACKGROUND:Contrast agents help to improve visibility in magnetic resonance(MR)imaging.However,owing to the large interstitial spaces of the liver,there is a reduction in the natural contrast gradient between lesions and healthy tissue.This study was undertaken to evaluate the efficacy and safety of the liverspecific MR imaging contrast agent gadoxetate disodium(GdEOB-DTPA)in Chinese patients.METHODS:This was a single-arm,open-label,multicenter study in patients with known or suspected focal liver lesions referred for contrast-enhanced MR imaging.MR imaging was performed in 234 patients before and after a single intravenous bolus of Gd-EOB-DTPA(0.025 mmol/kg body weight).Images were evaluated by clinical study investigators and three independent,blinded radiologists.The primary efficacy endpoint was sensitivity in lesion detection.RESULTS:Gd-EOB-DTPA improved sensitivity in lesion detection by 9.46%compared with pre-contrast imaging for the average of the three blinded readers(94.78%vs 85.32%for Gd-EOB-DTPA vs pre-contrast,respectively).Improvements in detection were more pronounced in lesions less than 1cm.Gd-EOB-DTPA improved diagnostic accuracy in lesion classification.CONCLUSIONS:This open-label study demonstrated that Gd-EOB-DTPA improves diagnostic sensitivity in liver lesions,particularly in those smaller than 1 cm.Gd-EOB-DTPA also significantly improves the diagnostic accuracy in lesion classification,and furthermore,Gd-EOB-DTPA is safe in Chinese patients with liver lesions.
基金Partly supporled by the State Key Basic Research Program Grant of China(G1998051211)Leading Speciality Grant of Shanghai Health Bureau.
文摘Metastatic human HCC model is needed for the studies on mechanism and intervention of metastatic recurrence. By using orthotopic implantation of histologically intact tissues of 30 surgical specimens, a patient-like metastatic model of human HCC in nude mice (LCI-D20) and a low metastatic model of human HCC in nude mice (LCI-D35) have been established. All mice with transplanted LCI-D20 tumors exhibited extremely high metastatic ability including spontaneous metastasis to liver, lungs, lymph nodes and peritoneal seeding. Remarkable difference was also found in expression of some of the invasiveness related genes and growth factors between the LCI-D20 and LCI-D35 tumors. PAI-1 increased gradually following tumor progression in LCI-D20 model, and correlated with tumor size and AFP level. Phasic expression of tissue intercellular adhesion molecule-1 in this model was also observed. Using corneal micropocket model, it was demonstrated that the vascular response induced by LCI-D20 tumor was stronger than that induced by LCI-D35 tumor. Similar report on metastatic human HCC model in nude mice and human HCC cell line with metastatic potential was rarely found in the literature. This LCI-D20 model has been widely used for the studies on intervention of metastasis, including anti-angiogenesis,antisense approach, metalloproteinase inhibitor, differentiation inducer, etc. It is concluded that the establishment of metastatic human HCC model in nude mice and human HCC cell line with metastatic potential will provide important models for the in vitro and in vitro study of HCC invasiveness, angiogenesis as well as intervention of HCC recurrence.
基金Supported by the National Natural Science Fundation of China (Grant Nos. 90211016, 40021101 and 30700090)
文摘Above- and belowground biomasses of grasslands are important parameters for characterizing re- gional and global carbon cycles in grassland ecosystems. Compared with the relatively detailed in- formation for aboveground biomass (AGB), belowground biomass (BGB) is poorly reported at the re- gional scales. The present study, based on a total of 113 sampling sites in temperate grassland of the Inner Mongolia, investigated regional distribution patterns of AGB, BGB, vertical distribution of roots, and their relationships with environmental factors. AGB and BGB increased from the southwest to the northeast of the study region. The largest biomass occurred in meadow steppe, with mean AGB and BGB of 196.7 and 1385.2 g/m2, respectively; while the lowest biomass occurred in desert steppe, with an AGB of 56.6 g/m2 and a BGB of 301.0 g/m2. In addition, about 47% of root biomass was distributed in the top 10 cm soil. Further statistical analysis indicated that precipitation was the primary determinant factor in shaping these distribution patterns. Vertical distribution of roots was significantly affected by precipitation, while the effects of soil texture and grassland types were weak.
文摘针对标准PSO中单一社会学习模式造成的算法容易陷入局部最优和后期收敛速度慢等问题,提出了一种基于多种群的自适应迁移PSO算法(Multi-population based self-adaptive migration PSO,MSMPSO).通过融合两种常用的邻居拓扑结构,赋予个体更多的信息来源;在多个子种群并行进化的基础上,利用不同加速因子的组合赋予各子种群不同的搜索特性,进而通过周期性对子种群的历史性能进行评估,以此为基础指导个体的迁移操作,实现子种群间的协作与计算资源的合理分配,并最终提升算法的综合性能.对CEC2013测试函数的优化结果表明,MSMPSO在求解精度、收敛速度等方面均表现出较好的性能.
文摘AIM:To compare the effects and postoperative complications between tissue selecting therapy stapler(TST)and Milligan-Morgan hemorrhoidectomy(M-M).METHODS:Four hundred and eighty patients with severe prolapsing hemorrhoids,who were admitted to the Shenyang Coloproctology Hospital between 2009and 2012,were randomly divided into observation(n=240)and control(n=240)groups.Hemorrhoidectomies were performed with TST in the observation group and with the M-M technique in the control group.The therapeutic effects,operation security,and postoperative complications in the two groups were compared.The immediate and long-term complications were assessed according to corresponding criteria.Pain was assessed on a visual analogue scale.The efficacy was assessed by specialized criteria.The follow-up was conducted one year after the operation.RESULTS:The total effective rates of the observation and control groups were 99.5%(217/218)and 98.6%(218/221)respectively;the difference was not statistically significant(P=0.322).Their were significant differences between observation and control groups in intraoperative blood loss(5.07±1.14 vs 2.45±0.57,P=0.000),pain(12 h after the surgery:5.08±1.62 vs 7.19±2.01,P=0.000;at first dressing change:2.64±0.87 vs 4.34±1.15,P=0.000;first defecation:3.91±1.47 vs 5.63±1.98,P=0.001),urine retention(n=22 vs n=47,P=0.001),anal pendant expansion after the surgery(2.35±0.56 vs 5.16±1.42,P=0.000),operation time(18.3±5.6 min vs 29.5±8.2 min,P=0.000),and the length of hospital stay(5.3±0.6 d vs 11.4±1.8 d,P=0.000).Moreover TST showed significant reductions compared to M-M in the rates of long-term complications such as fecal incontinence(n=3 vs n=16,P=0.003),difficult bowel movement(n=1 vs n=9,P=0.011),intractable pain(n=2 vs n=12,P=0.007),and anal discharge(n=3 vs n=23,P=0.000).CONCLUSION:TST for severe prolapsing hemorrhoids is a satisfactory technique for more rapid recovery,lower complication rates,and higher operation security.
基金supported by the the Chinese Ministry of Science and Technology (2016YFC1306401)
文摘Alzheimer’s disease(AD), the most common type of dementia, is becoming a major challenge for global health and social care. However, the current understanding of AD pathogenesis is limited, and no early diagnosis and disease-modifying therapy are currently available. During the past year, significant progress has been made in clinical research on the diagnosis, prevention, and treatment of AD.In this review, we summarize the latest achievements,including diagnostic biomarkers, polygenic hazard score,amyloid and tau PET imaging, clinical trials targeting amyloid-beta(Ab), tau, and neurotransmitters, early intervention, and primary prevention and systemic intervention approaches, and provide novel perspectives for further efforts to understand and cure the disease.
