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
OBJECTIVE: To investigate the effects of electroacupuncture(EA) at Taichong(LR 3) and Baihui(DU 20)on myocardial hypertrophy in spontaneously hypertensive rats(SHRs).METHODS: Thirty-six SHRs were randomly assigned to ...OBJECTIVE: To investigate the effects of electroacupuncture(EA) at Taichong(LR 3) and Baihui(DU 20)on myocardial hypertrophy in spontaneously hypertensive rats(SHRs).METHODS: Thirty-six SHRs were randomly assigned to model, EA, and Losartan groups, with twelve rats per group. Twelve Wistar Kyoto rats were selected as the normal control group. Systolic blood pressure(SBP) and cardiac function were measured in all rats.Expression levels of factors associated with the phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin(PI3K/Akt/mTOR) pathway were evaluated by Western blotting and real-time PCR.Pathological changes of the heart tissue were observed by hematoxylin-eosin staining.RESULTS: After treatment, enhanced SBP was significantly decreased in the EA and Losartan groups compared with the model group(P < 0.01). Echocardiographic and morphological analyses revealed that enhanced end-diastolic interventricular septal thickness and left ventricular posterior wall thickness, as well as ratio of left ventricular weight to body weight were markedly diminished in the EA and Losartan groups(P < 0.01 or P < 0.05), while reduced left ventricular end-diastolic dimension and left ventricular ejection fraction were significantly ameliorated(P < 0.01). Real-time PCR and western blotting analyses showed that the expression levels of PI3K,Akt, and mT OR in SHRs were significantly up-regulated by EA and Losartan(P < 0.01), while the expression levels of PTEN and ANP were down-regulated(P < 0.01).CONCLUSION: EA at Taichong(LR 3) and Baihui(DU20) inhibited the development of cardiac hypertrophy and improved the cardiac function in SHRs, possibly through regulation of the PI3K/Akt/mTOR signalling pathway.展开更多
OBJECTIVE:To evaluate the effects of a combination of Yinyanghuo(Herba Epimedii Brevicornus)(HEB)and Cheqianzi(Semen Plantaginis)(SP)on erectile dysfunction caused by essential hypertension in spontaneously hypertensi...OBJECTIVE:To evaluate the effects of a combination of Yinyanghuo(Herba Epimedii Brevicornus)(HEB)and Cheqianzi(Semen Plantaginis)(SP)on erectile dysfunction caused by essential hypertension in spontaneously hypertensive rats(SHRs),and to elucidate the role of the angiotensin-converting enzyme 2-angiotensin-(1-7)-Mas receptor(ACE2/Ang[1-7]/Mas receptor)axis in this process.METHODS:A total of 24 SHRs were randomly assigned to three groups:SHR-control,low-dose(12.5 g/kg)and high-dose(25 g/kg)HEB+SP(HEBSP).Eight Wistar-Kyoto rats were used as normal controls.HEBSP was administered by oral gavage for 28 d.Erectile function was measured once a week using the Heaton test.After 4 weeks of treatment,the corpus cavernosum was harvested from each rat to measure nitric oxide(NO),nitric oxide synthase(e NOS)and Ang(1-7)levels,as well as ACE2,Mas receptor and neuronal nitric oxide synthase(n NOS)protein expression.RESULTS:After 4 weeks of treatment,HEBSP significantly increased erectile function in the treated group compared with SHR-control group(P<0.01).Additionally,HEBSP treatment significantly increased cavernosal levels of Ang(1-7),e NOS and NO.Moreover,HEBSP significantly elevated the expression levels of ACE2,Mas receptor and n NOS.These beneficial effects were elevated in the high-dose HEBSP group.CONCLUSION:HEBSP improved erectile function in SHRs by upregulating the ACE2/Ang(1-7)/Mas receptor axis,e NOS and n NOS pathways.展开更多
目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组...目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组采用螺内酯双蒸水溶解,20 mg/(kg.d)灌胃,对照组和WKY组采用等容积双蒸水灌胃,连续16周。Westernblot方法分析心肌组织Ⅰ型胶原的水平;偏振光显微镜下观察Ⅰ、Ⅲ型胶原,图像分析系统分别计算Ⅰ、Ⅲ型胶原面积积分及Ⅰ/Ⅲ型胶原比值。结果:与WKY组比较,对照组心肌组织Ⅰ型胶原明显增多(1.87±0.2 vs 1.21±0.7,P<0.05),治疗16周,与对照组比较,螺内酯组心肌组织Ⅰ型胶原下降(1.42±0.05 vs 1.87±0.2),差异有统计学意义(P<0.05)。偏振光显微镜观察心肌Ⅰ、Ⅲ型胶原面积,与对照组比较,螺内酯组Ⅰ型胶原像素(6400±259 vs 12019±734)、Ⅰ/Ⅲ型胶原比值(15.64±1.34 vs 20.8±3.04)明显下降,差异有统计学意义(P<0.05),但三组间Ⅲ型胶原像素比较,差异未见有统计学意义(P>0.05)。结论:螺内酯减少SHR心肌Ⅰ型胶原的沉积及Ⅰ/Ⅲ型胶原比值,对Ⅲ型胶原无明显影响。展开更多
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.
基金Supported by Beijing Natural Science Foundation:Regulating effect of electroacupuncture on cardiac hypertrophy of spontaneously hypertensive rats based on PI3K/AKT signal transduction pathway(No.7162121)Young Teacher Program of Beijing University of Chinese Medicine:Mechanism of acupuncture on left ventricular remodeling in spontaneously hypertensive rats based on microRNA-195 targeting TGF/Smads signaling pathway(No.2017-JYB-JS-030)
文摘OBJECTIVE: To investigate the effects of electroacupuncture(EA) at Taichong(LR 3) and Baihui(DU 20)on myocardial hypertrophy in spontaneously hypertensive rats(SHRs).METHODS: Thirty-six SHRs were randomly assigned to model, EA, and Losartan groups, with twelve rats per group. Twelve Wistar Kyoto rats were selected as the normal control group. Systolic blood pressure(SBP) and cardiac function were measured in all rats.Expression levels of factors associated with the phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin(PI3K/Akt/mTOR) pathway were evaluated by Western blotting and real-time PCR.Pathological changes of the heart tissue were observed by hematoxylin-eosin staining.RESULTS: After treatment, enhanced SBP was significantly decreased in the EA and Losartan groups compared with the model group(P < 0.01). Echocardiographic and morphological analyses revealed that enhanced end-diastolic interventricular septal thickness and left ventricular posterior wall thickness, as well as ratio of left ventricular weight to body weight were markedly diminished in the EA and Losartan groups(P < 0.01 or P < 0.05), while reduced left ventricular end-diastolic dimension and left ventricular ejection fraction were significantly ameliorated(P < 0.01). Real-time PCR and western blotting analyses showed that the expression levels of PI3K,Akt, and mT OR in SHRs were significantly up-regulated by EA and Losartan(P < 0.01), while the expression levels of PTEN and ANP were down-regulated(P < 0.01).CONCLUSION: EA at Taichong(LR 3) and Baihui(DU20) inhibited the development of cardiac hypertrophy and improved the cardiac function in SHRs, possibly through regulation of the PI3K/Akt/mTOR signalling pathway.
文摘OBJECTIVE:To evaluate the effects of a combination of Yinyanghuo(Herba Epimedii Brevicornus)(HEB)and Cheqianzi(Semen Plantaginis)(SP)on erectile dysfunction caused by essential hypertension in spontaneously hypertensive rats(SHRs),and to elucidate the role of the angiotensin-converting enzyme 2-angiotensin-(1-7)-Mas receptor(ACE2/Ang[1-7]/Mas receptor)axis in this process.METHODS:A total of 24 SHRs were randomly assigned to three groups:SHR-control,low-dose(12.5 g/kg)and high-dose(25 g/kg)HEB+SP(HEBSP).Eight Wistar-Kyoto rats were used as normal controls.HEBSP was administered by oral gavage for 28 d.Erectile function was measured once a week using the Heaton test.After 4 weeks of treatment,the corpus cavernosum was harvested from each rat to measure nitric oxide(NO),nitric oxide synthase(e NOS)and Ang(1-7)levels,as well as ACE2,Mas receptor and neuronal nitric oxide synthase(n NOS)protein expression.RESULTS:After 4 weeks of treatment,HEBSP significantly increased erectile function in the treated group compared with SHR-control group(P<0.01).Additionally,HEBSP treatment significantly increased cavernosal levels of Ang(1-7),e NOS and NO.Moreover,HEBSP significantly elevated the expression levels of ACE2,Mas receptor and n NOS.These beneficial effects were elevated in the high-dose HEBSP group.CONCLUSION:HEBSP improved erectile function in SHRs by upregulating the ACE2/Ang(1-7)/Mas receptor axis,e NOS and n NOS pathways.
文摘目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组采用螺内酯双蒸水溶解,20 mg/(kg.d)灌胃,对照组和WKY组采用等容积双蒸水灌胃,连续16周。Westernblot方法分析心肌组织Ⅰ型胶原的水平;偏振光显微镜下观察Ⅰ、Ⅲ型胶原,图像分析系统分别计算Ⅰ、Ⅲ型胶原面积积分及Ⅰ/Ⅲ型胶原比值。结果:与WKY组比较,对照组心肌组织Ⅰ型胶原明显增多(1.87±0.2 vs 1.21±0.7,P<0.05),治疗16周,与对照组比较,螺内酯组心肌组织Ⅰ型胶原下降(1.42±0.05 vs 1.87±0.2),差异有统计学意义(P<0.05)。偏振光显微镜观察心肌Ⅰ、Ⅲ型胶原面积,与对照组比较,螺内酯组Ⅰ型胶原像素(6400±259 vs 12019±734)、Ⅰ/Ⅲ型胶原比值(15.64±1.34 vs 20.8±3.04)明显下降,差异有统计学意义(P<0.05),但三组间Ⅲ型胶原像素比较,差异未见有统计学意义(P>0.05)。结论:螺内酯减少SHR心肌Ⅰ型胶原的沉积及Ⅰ/Ⅲ型胶原比值,对Ⅲ型胶原无明显影响。
