Diabetic heart disease(DHD)can be classified as a primary consequence from several pathophysiological manifestation of diabetes mellitus(DM)on cardiac tissues or secondarily in extracardiac tissues and is encountered ...Diabetic heart disease(DHD)can be classified as a primary consequence from several pathophysiological manifestation of diabetes mellitus(DM)on cardiac tissues or secondarily in extracardiac tissues and is encountered as either primary or secondary complications of DM.Endothelitis is inflammation of the vascular endothelium and is likely to be seen in the majority of patients who start to manifest an end organ complication of DM in this case DHD.Diabetes is a leading cause for many cardiovascular syndromes and diseases including congestive heart failure(CHF)however much remains unknown about the transition from diagnosed DM to clinical state and the contribution of the various mechanical and counterregulatory systems in the manifested complaint.Diastolic heart failure or heart failure with preserved ejection fraction(DHF/HFpEF),accounts for half of all CHF presentations,has DM as a major contributor,however,there remain large gaps in clinical and pathophysiological understanding.This review aims to explore the microscopic aspects in diabetic endothelitis and provide a clinical link to with context to HFpEF.展开更多
Polyurethanes(PUs) are well-known for their biocompatibility but their intrinsic inert property hampers cell-matrix interactions. Surface modifications are thus necessary to widen their use for biomedical applications...Polyurethanes(PUs) are well-known for their biocompatibility but their intrinsic inert property hampers cell-matrix interactions. Surface modifications are thus necessary to widen their use for biomedical applications. In this work, surface modifications of PU were achieved first by incorporating polyhedral oligomeric silsesquioxane(POSS), followed by alteration of the surface topography via the breath figures method. Subsequently, surface chemistry was also modified by immobilization of gelatin molecules through grafting, for the enhancement of the surface cytocompatibility. Scanning electron microscopy(SEM) was used to verify the formation of highly ordered microstructures while static contact angle, FTIR and XPS confirmed the successful grafting of gelatin molecules onto the surfaces. In vitro culture of human umbilical vein endothelial cells(HUVECs) revealed that endothelial cell adhesion and proliferation were significantly enhanced on the gelatin-modified surfaces, as shown by live/dead staining and WST-1 proliferation assay. The results indicated that the combination of the strategies yielded an interface that improves cell attachment and subsequent growth. This enhancement is important for the development of higher quality biomedical implants such as vascular grafts.展开更多
目的研究17β-雌二醇(E2)对蛛网膜下腔出血(SAH)后迟发型脑血管痉挛(DCV)的抑制作用。方法雄性Wistar大鼠50只随机分为5组:①空白组,②假穿刺组,③SAH组,④SAH+E2组,⑤SAH+安慰剂组。采用酶联免疫吸附法(ELISA)检测血浆中内皮素-1(ET-1...目的研究17β-雌二醇(E2)对蛛网膜下腔出血(SAH)后迟发型脑血管痉挛(DCV)的抑制作用。方法雄性Wistar大鼠50只随机分为5组:①空白组,②假穿刺组,③SAH组,④SAH+E2组,⑤SAH+安慰剂组。采用酶联免疫吸附法(ELISA)检测血浆中内皮素-1(ET-1)含量,末端脱氧核苷酸转移酶介导的生物素脱氧尿嘧啶核苷酸缺口末端标记法(TUNEL)检测颞叶神经元凋亡情况,通过测定基底动脉血管横截面积判断脑血管痉挛情况。结果实验结果显示SAH后7 d SAH+E2组基底动脉横截面积与SAH组和SAH+安慰剂组相比明显变大(P<0.01);与SAH组和SAH+安慰剂组相比,SAH+E2组血浆ET-1浓度明显减少(P<0.01);TUNEL染色显示SAH+E2组颞叶皮质神经元凋亡程度较SAH组和SAH+安慰剂组显著性减轻。结论持续给予E2维持其生理浓度可以有效预防SAH后迟发型脑血管痉挛,部分可能与E2可以抑制ET-1的产生有关。展开更多
目的探讨磷酸酶PHLPP1在人脐静脉内皮细胞(HUVEC)中的基础表达及转基因对其增殖的影响。方法体外培养的HUVEC分3组处理,分别为未转染组、转染pcDNA3-GFP组和转染pcDNA3HA-PHLPP组。通过构建pcDNA3HA-PHLPP1质粒并瞬时转染HUVEC。以细胞...目的探讨磷酸酶PHLPP1在人脐静脉内皮细胞(HUVEC)中的基础表达及转基因对其增殖的影响。方法体外培养的HUVEC分3组处理,分别为未转染组、转染pcDNA3-GFP组和转染pcDNA3HA-PHLPP组。通过构建pcDNA3HA-PHLPP1质粒并瞬时转染HUVEC。以细胞计数及噻唑盐比色法测定细胞增殖能力,Western blot ting定量磷酸酶PHLPP1蛋白表达水平。结果基础状态下HUVEC不表达PHLPP1。转染pcDNA3HA-PHLPP1组明显增加PHLPP1表达,与正常对照组、pcDNA3-GFP组比较差异显著(均P<0.01)。3组的细胞增殖指标无明显差异(P>0.05),其中MTT吸收度A值分别是0.134±0.015,0.133±0.014,0.137±0.016,细胞计数为(8.293±0.962)×105,(7.937±0.101)×105,8.127±0.112)×105。结论 PHLPP可能不是调节HUVEC增殖的最重要信号蛋白。展开更多
文摘Diabetic heart disease(DHD)can be classified as a primary consequence from several pathophysiological manifestation of diabetes mellitus(DM)on cardiac tissues or secondarily in extracardiac tissues and is encountered as either primary or secondary complications of DM.Endothelitis is inflammation of the vascular endothelium and is likely to be seen in the majority of patients who start to manifest an end organ complication of DM in this case DHD.Diabetes is a leading cause for many cardiovascular syndromes and diseases including congestive heart failure(CHF)however much remains unknown about the transition from diagnosed DM to clinical state and the contribution of the various mechanical and counterregulatory systems in the manifested complaint.Diastolic heart failure or heart failure with preserved ejection fraction(DHF/HFpEF),accounts for half of all CHF presentations,has DM as a major contributor,however,there remain large gaps in clinical and pathophysiological understanding.This review aims to explore the microscopic aspects in diabetic endothelitis and provide a clinical link to with context to HFpEF.
基金supported by the National Natural Science Foundation of China(21376054)the Educational Commission of Zhejiang Province of China(Y201223742)the AcRF Tier 1 Grant RG 36/12,Ministry of Education,Singapore
文摘Polyurethanes(PUs) are well-known for their biocompatibility but their intrinsic inert property hampers cell-matrix interactions. Surface modifications are thus necessary to widen their use for biomedical applications. In this work, surface modifications of PU were achieved first by incorporating polyhedral oligomeric silsesquioxane(POSS), followed by alteration of the surface topography via the breath figures method. Subsequently, surface chemistry was also modified by immobilization of gelatin molecules through grafting, for the enhancement of the surface cytocompatibility. Scanning electron microscopy(SEM) was used to verify the formation of highly ordered microstructures while static contact angle, FTIR and XPS confirmed the successful grafting of gelatin molecules onto the surfaces. In vitro culture of human umbilical vein endothelial cells(HUVECs) revealed that endothelial cell adhesion and proliferation were significantly enhanced on the gelatin-modified surfaces, as shown by live/dead staining and WST-1 proliferation assay. The results indicated that the combination of the strategies yielded an interface that improves cell attachment and subsequent growth. This enhancement is important for the development of higher quality biomedical implants such as vascular grafts.
文摘目的研究17β-雌二醇(E2)对蛛网膜下腔出血(SAH)后迟发型脑血管痉挛(DCV)的抑制作用。方法雄性Wistar大鼠50只随机分为5组:①空白组,②假穿刺组,③SAH组,④SAH+E2组,⑤SAH+安慰剂组。采用酶联免疫吸附法(ELISA)检测血浆中内皮素-1(ET-1)含量,末端脱氧核苷酸转移酶介导的生物素脱氧尿嘧啶核苷酸缺口末端标记法(TUNEL)检测颞叶神经元凋亡情况,通过测定基底动脉血管横截面积判断脑血管痉挛情况。结果实验结果显示SAH后7 d SAH+E2组基底动脉横截面积与SAH组和SAH+安慰剂组相比明显变大(P<0.01);与SAH组和SAH+安慰剂组相比,SAH+E2组血浆ET-1浓度明显减少(P<0.01);TUNEL染色显示SAH+E2组颞叶皮质神经元凋亡程度较SAH组和SAH+安慰剂组显著性减轻。结论持续给予E2维持其生理浓度可以有效预防SAH后迟发型脑血管痉挛,部分可能与E2可以抑制ET-1的产生有关。
文摘目的探讨磷酸酶PHLPP1在人脐静脉内皮细胞(HUVEC)中的基础表达及转基因对其增殖的影响。方法体外培养的HUVEC分3组处理,分别为未转染组、转染pcDNA3-GFP组和转染pcDNA3HA-PHLPP组。通过构建pcDNA3HA-PHLPP1质粒并瞬时转染HUVEC。以细胞计数及噻唑盐比色法测定细胞增殖能力,Western blot ting定量磷酸酶PHLPP1蛋白表达水平。结果基础状态下HUVEC不表达PHLPP1。转染pcDNA3HA-PHLPP1组明显增加PHLPP1表达,与正常对照组、pcDNA3-GFP组比较差异显著(均P<0.01)。3组的细胞增殖指标无明显差异(P>0.05),其中MTT吸收度A值分别是0.134±0.015,0.133±0.014,0.137±0.016,细胞计数为(8.293±0.962)×105,(7.937±0.101)×105,8.127±0.112)×105。结论 PHLPP可能不是调节HUVEC增殖的最重要信号蛋白。
