以远东拟沙丁鱼肌肉为原料,采用动物蛋白水解酶和风味蛋白酶联合水解制备其酶解产物(简称为SMMH),SMMH通过截留分子量分别为10 k Da和3 k Da超滤膜进行分离,获得3个组分,分别称为A(MW>10k Da)、B(3 k Da<MW<10 k Da)和C(MW<...以远东拟沙丁鱼肌肉为原料,采用动物蛋白水解酶和风味蛋白酶联合水解制备其酶解产物(简称为SMMH),SMMH通过截留分子量分别为10 k Da和3 k Da超滤膜进行分离,获得3个组分,分别称为A(MW>10k Da)、B(3 k Da<MW<10 k Da)和C(MW<3 k Da)。以体外血管紧张素转移酶(angiotensin-converting enzyme,ACE)抑制率为指标,评价其活性。结果显示:C的ACE抑制率最大,为71.4%,A的ACE抑制率最低,为34.6%。为了进一步评价组分C降血压效果,以原发性高血压大鼠为模型,采用灌胃方式,研究其短期(10 h)与长期(28 d)降血压功效,结果显示:灌胃3种剂量组分C对SHRs大鼠的收缩压有显著降低作用,并且随着剂量的增加,降血压作用越显著。为了确定C组分降血压肽的结构,采用凝胶色谱、离子色谱、反向高效液相色谱相结合对其进行了分离纯化,获得了2个较纯的组分,经电喷雾质谱鉴定,一种为Lys-Val-Glu-Pro-Leu-Pro,另一种为Pro-Ala-Leu,它们的IC50分别为22.9μmol/L和12.2μmol/L。展开更多
The complex nonlinear optical process induced by two-photon-resonant excitation of Na 3S-4D has been thoroughly studied and the generated coherent radiation in the vicinity of 2.34μm measured and analysed.Based on th...The complex nonlinear optical process induced by two-photon-resonant excitation of Na 3S-4D has been thoroughly studied and the generated coherent radiation in the vicinity of 2.34μm measured and analysed.Based on the observation of forward and backward output it is believed that the complex process is composed of the optical-pumped stimulated emission (OPSE),stimulated hyper-Raman scattering (SHRS) and four-wave parametric mixing (FWPM).They often coexist simultaneously,each dominating over the others under different conditions,and there are obvious competitions among them.By adjusting experimental conditions,such as the temperature of medium,frequency of input light and interaction length,high conversion efficiency has been achieved.In this work the generated coherent 1R radiation centered at 2.34μm was tunable in 300cm-1,with a peak Dower of 100 kW,and an efficiency of 2%.18 new coherent UV lines were observed for the first time展开更多
[Objectives] To study the effects of Mangiferin( MGF) on TNF-α,iNOS,ICAM-1 and its mRNA expression in the heart,brain and kidneys of spontaneously hypertensive rats( SHR),and reveal the mechanism of its anti-inflamma...[Objectives] To study the effects of Mangiferin( MGF) on TNF-α,iNOS,ICAM-1 and its mRNA expression in the heart,brain and kidneys of spontaneously hypertensive rats( SHR),and reveal the mechanism of its anti-inflammatory injury in hypertension target organs.[Methods]SHRs were randomly divided into 5 groups: the model group,the high-dose,medium-dose,low-dose MGF groups and the Benazepril group,with 8 rats in each group,WKY rats were used for the normal control group. Besides,on-invasive blood pressure( BP) instruments were used to measure systolic blood pressure in the rats' tail artery,western blot was used to analyze the expression of TNF-α,iNOS,ICAM-1 and reverse transcription-polymerase chain reaction( RT-PCR) was used to analyze the expression of TNF-α,iNOS,ICAM-1 mRNA.[Results]Compared with the normal control group,the model group's BP level was significantly increased( P <0. 01)),but the MGF had no significant lowering BP effect( P > 0. 05); compared with the normal control group,the expression of TNF-α,iNOS,ICAM-1 and its' mRNA in the model group was significantly increased( P < 0. 05 or P < 0. 01),and MGF could reduce the level of expression of these inflammatory cytokines( P < 0. 05 or P < 0. 01); between the Benazepril group and high-dose,medium-dose,low-dose MGF groups,most of the indicators had no significant difference( P > 0. 05). [Conclusions]MGF had no significant lowering BP effect,SHR showed inflammatory injury in the heart,brain and kidneys,MGF showed improvement on the inflammatory injury,and the anti-inflammation mechanism may be associated with lowering TNF-α,i NOS and ICAM-1 and its mRNA expression.展开更多
The abnormal growth of epithelium-like cells has been noticed in spontaneously hypertensive rats(SHRs)with hypertensive nephropathy.However,the characteristics of abnormal epithelium-like cells and their pathogenesis ...The abnormal growth of epithelium-like cells has been noticed in spontaneously hypertensive rats(SHRs)with hypertensive nephropathy.However,the characteristics of abnormal epithelium-like cells and their pathogenesis in hypertensive nephropathy are not fully understood.In the present study,we investigated the correlation of epithelium-like cells with glomerular injury,and the effects of early drug intervention with telmisartan,an anti-hypertensive drug,on the growth of epithelium-like cells.The results showed that the epithelium-like cells were obviously observed lining along the luminal surface of Bowman’s capsule in glomeruli,significantly resulting in the atrophy of the glomerular tuft.Some of the epithelium-like cells strongly expressed proliferating cell nuclear antigen(PCNA)and vimentin,indicating active cellular proliferation.The incidence of epithelium-like cells varied from 13.6%to 54.4%of glomeruli in 48-week-old SHRs,and from 5.1%to 18.0%of glomeruli in age-matched Wistar-Kyoto(WKY)rats(P<0.01).The linear regression analysis further confirmed an obvious correlation between the incidence of epithelium-like cells and the glomerular injury.Moreover,early intervention with telmisartan could dramatically attenuate the progression of epithelium-like cells growth.However,no significant effect of telmisartan on the established epithelium-like cells was observed.Taken together,we demonstrated the involvement of abnormal epithelium-like cells growth in glomerular injury during hypertensive nephropathy in SHRs,and firstly showed the positive effects of the anti-hypertensive drug on the progression of epithelium-like cells growth.展开更多
文摘以远东拟沙丁鱼肌肉为原料,采用动物蛋白水解酶和风味蛋白酶联合水解制备其酶解产物(简称为SMMH),SMMH通过截留分子量分别为10 k Da和3 k Da超滤膜进行分离,获得3个组分,分别称为A(MW>10k Da)、B(3 k Da<MW<10 k Da)和C(MW<3 k Da)。以体外血管紧张素转移酶(angiotensin-converting enzyme,ACE)抑制率为指标,评价其活性。结果显示:C的ACE抑制率最大,为71.4%,A的ACE抑制率最低,为34.6%。为了进一步评价组分C降血压效果,以原发性高血压大鼠为模型,采用灌胃方式,研究其短期(10 h)与长期(28 d)降血压功效,结果显示:灌胃3种剂量组分C对SHRs大鼠的收缩压有显著降低作用,并且随着剂量的增加,降血压作用越显著。为了确定C组分降血压肽的结构,采用凝胶色谱、离子色谱、反向高效液相色谱相结合对其进行了分离纯化,获得了2个较纯的组分,经电喷雾质谱鉴定,一种为Lys-Val-Glu-Pro-Leu-Pro,另一种为Pro-Ala-Leu,它们的IC50分别为22.9μmol/L和12.2μmol/L。
基金Project supported by the National Natural Science Foundation of China
文摘The complex nonlinear optical process induced by two-photon-resonant excitation of Na 3S-4D has been thoroughly studied and the generated coherent radiation in the vicinity of 2.34μm measured and analysed.Based on the observation of forward and backward output it is believed that the complex process is composed of the optical-pumped stimulated emission (OPSE),stimulated hyper-Raman scattering (SHRS) and four-wave parametric mixing (FWPM).They often coexist simultaneously,each dominating over the others under different conditions,and there are obvious competitions among them.By adjusting experimental conditions,such as the temperature of medium,frequency of input light and interaction length,high conversion efficiency has been achieved.In this work the generated coherent 1R radiation centered at 2.34μm was tunable in 300cm-1,with a peak Dower of 100 kW,and an efficiency of 2%.18 new coherent UV lines were observed for the first time
基金Supported by the Guangxi Science and Technology Infrastructure Construction Project of China(09-007-06)
文摘[Objectives] To study the effects of Mangiferin( MGF) on TNF-α,iNOS,ICAM-1 and its mRNA expression in the heart,brain and kidneys of spontaneously hypertensive rats( SHR),and reveal the mechanism of its anti-inflammatory injury in hypertension target organs.[Methods]SHRs were randomly divided into 5 groups: the model group,the high-dose,medium-dose,low-dose MGF groups and the Benazepril group,with 8 rats in each group,WKY rats were used for the normal control group. Besides,on-invasive blood pressure( BP) instruments were used to measure systolic blood pressure in the rats' tail artery,western blot was used to analyze the expression of TNF-α,iNOS,ICAM-1 and reverse transcription-polymerase chain reaction( RT-PCR) was used to analyze the expression of TNF-α,iNOS,ICAM-1 mRNA.[Results]Compared with the normal control group,the model group's BP level was significantly increased( P <0. 01)),but the MGF had no significant lowering BP effect( P > 0. 05); compared with the normal control group,the expression of TNF-α,iNOS,ICAM-1 and its' mRNA in the model group was significantly increased( P < 0. 05 or P < 0. 01),and MGF could reduce the level of expression of these inflammatory cytokines( P < 0. 05 or P < 0. 01); between the Benazepril group and high-dose,medium-dose,low-dose MGF groups,most of the indicators had no significant difference( P > 0. 05). [Conclusions]MGF had no significant lowering BP effect,SHR showed inflammatory injury in the heart,brain and kidneys,MGF showed improvement on the inflammatory injury,and the anti-inflammation mechanism may be associated with lowering TNF-α,i NOS and ICAM-1 and its mRNA expression.
基金the General Financial Grant from the China Postdoctoral Science Foundation(No.2014M560722)the Natural Science Foundation of Sichuan University of Science and Engineering(No.2015RC30)the Science and Technology Support Program of Sichuan Province of China(No.2017RZ0083).
文摘The abnormal growth of epithelium-like cells has been noticed in spontaneously hypertensive rats(SHRs)with hypertensive nephropathy.However,the characteristics of abnormal epithelium-like cells and their pathogenesis in hypertensive nephropathy are not fully understood.In the present study,we investigated the correlation of epithelium-like cells with glomerular injury,and the effects of early drug intervention with telmisartan,an anti-hypertensive drug,on the growth of epithelium-like cells.The results showed that the epithelium-like cells were obviously observed lining along the luminal surface of Bowman’s capsule in glomeruli,significantly resulting in the atrophy of the glomerular tuft.Some of the epithelium-like cells strongly expressed proliferating cell nuclear antigen(PCNA)and vimentin,indicating active cellular proliferation.The incidence of epithelium-like cells varied from 13.6%to 54.4%of glomeruli in 48-week-old SHRs,and from 5.1%to 18.0%of glomeruli in age-matched Wistar-Kyoto(WKY)rats(P<0.01).The linear regression analysis further confirmed an obvious correlation between the incidence of epithelium-like cells and the glomerular injury.Moreover,early intervention with telmisartan could dramatically attenuate the progression of epithelium-like cells growth.However,no significant effect of telmisartan on the established epithelium-like cells was observed.Taken together,we demonstrated the involvement of abnormal epithelium-like cells growth in glomerular injury during hypertensive nephropathy in SHRs,and firstly showed the positive effects of the anti-hypertensive drug on the progression of epithelium-like cells growth.
