An Electrospun Scaffold Loaded with an Enteromorpha Polysaccharide for Accelerated Wound Healing in Diabetic Mice

The design and development of innovative multifunctional wound dressing materials in engineered biomaterials is essential for promoting tissue repair. In this study, nanofibrous wound dressing materials loaded with anti-inflammatory ingredients were manufactured by a promising electrospinning strategy, and their capability for treating diabetic wounds was also investigated. A scaffold blend consisting of an Enteromorpha polysaccharide and polyvinyl alcohol (PVA) was fabricated. The in vitro and in vivo studies confirmed the efficacy of PVA/EPP1 fiber. We found that PVA/EPP1 fiber accelerated the repair of a full-thickness skin wound in diabetic mice. The results suggest that this scaffold could effectively shorten the wound healing time by inhibiting inflammatory activity, which makes it a promising candidate for the treatment of hard-to-heal wounds caused by diabetes.     

微血管周细胞与糖尿病视网膜病变中西医研究进展

大量的实验研究已经证实,微血管周细胞在糖尿病视网膜病变早期防治中扮演重要角色。为了观察和研究糖尿病视网膜病变早期微血管周细胞结构和功能变化,本文对近些年微血管周细胞的起源、形态分布、生理功能、细胞培养与鉴定、周细胞凋亡与糖尿病视网膜病变关系以及中医药防治糖尿病视网膜病变的研究进展进行综述,以期为糖尿病视网膜病变的周细胞研究及早期防治提供一种新思路。     

加味生脉补心丹对2型糖尿病大鼠心肌损伤的保护作用

目的 探讨加味生脉补心丹（以下简称BXD）对自发性非肥胖2型糖尿病Goto-kakisaki （GK）大鼠心肌损伤的保护作用。方法 8~9周龄雄性Wistar大鼠8只作为空白组,另将40只糖尿病模型GK大鼠按随机数字表将大鼠分为5组,分别为：模型组、西药组（格列齐特缓释片组）、BXD低剂量组、BXD中剂量组、BXD高剂量组。各组大鼠按治疗方法给药10周后处死,腹主动脉采血检测空腹血糖（FPG）、糖化血红蛋白（HbAlc）、超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-Px）、丙二醛（MDA）,取左心室行心肌组织HE染色、PAS染色观察病理改变,免疫组化测定心肌凋亡相关蛋白Bax、Bcl-2的表达。结果 与空白组比较,模型组FPG、HbAlc显著升高（P<0.01）,SOD、GSH-Px均显著降低（P<0.01）,MDA显著升高（P<0.01）;HE染色可见心肌组织水肿坏死、纤维溶解断裂;PAS染色可见大量糖原物质沉积;免疫组化示心肌组织Bax表达增多、Bcl-2表达减少（P<0.01）。与模型组比较,BXD低剂量组FPG降低（P<0.05）,西药组和BXD中、高剂量组FPG均显著降低（P<0.01）;西药组HbAlc显著降低（P<0.01）,BXD高剂量组HbAlc降低（P<0.05）;西药组与BXD高剂量组SOD、GSH-Px均显著升高（P<0.01）、MDA含量均降低（P<0.05）;西药组、BXD高剂量组Bax表达显著减少（P<0.01）,西药组及BXD中剂量组、高剂量组Bcl-2表达显著增多（P<0.01）。结论 BXD对GK大鼠心肌损伤具有保护作用,其机制可能是通过增强抗氧化能力、抑制心肌细胞凋亡,从而起到心肌保护作用。     

Bone morphological analyses in Spontaneously Diabetic Torii (SDT) fatty rats

The Spontaneously Diabetic Torii (SDT) fatty rat, a model for obese type 2 diabetes, shows bone quantitative abnormalities, namely low bone mineral density (BMD). The objective of this study was to evaluate bone morphological changes, in particular identifying the bone qualitative abnormalities, in the SDT fatty rat. Male SDT fatty rats showed increases in total trabecular area and trabecular number and decreases in trabecular thickness in cancellous bones of the proximal tibia, indicating trabecular miniaturization. The SDT fatty rat is useful for investigation of pathophysiological changes in bone quality in diabetic osteoporosis.     

Antihyperglycemic Effects of <Emphasis Type="Italic">Platycodon grandiflorum</Emphasis> (Jacq.) A. DC. Extract on Streptozotocin-induced Diabetic Mice

The root of Platycodon grandiflorum (Jacq.) A. DC has been reported to have a wide range of health benefits in oriental food. This study examined the hypoglycemic effects of Platycodon grandiflorum (Jacq.) A. DC aqueous-ethanol extract (PGE) in streptozotocin (STZ) -induced diabetic ICR mice (STZ diabetic mice) for the first time. The effects of PGE on blood glucose, plasma insulin levels and body weight were investigated. A significant decrease in blood glucose levels was observed after single administration of PGE. Furthermore, Glibenclamide and PGE significantly suppressed the rise in blood glucose after 30 min in the acute glucose tolerance test. Treatment with glibenclamide and PGE resulted in a reduction in blood glucose levels from the 2nd week, and this reduction was maintained until the 4th week of treatment. The body weight changed slightly in glibenclamide and PGE treated mice in comparison with the STZ control group. Plasma insulin levels were increased with glibenclamide treatment in STZ diabetic mice, whereas such effect was not observed with PGE. These results indicated that PGE could induce hypoglycemic effects without stimulating insulin secretion.     

The Protective Effect of Fucoidan in Rats with Streptozotocin-Induced Diabetic Nephropathy

Diabetic nephropathy (DN) has long been recognized as the leading cause of end-stage renal disease, but the efficacy of available strategies for the prevention of DN remains poor. The aim of this study was to investigate the possible beneficial effects of fucoidan (FPS) in streptozotocin (STZ)-induced diabetes in rats. Wistar rats were made diabetic by injection of STZ after removal of the right kidney. FPS was administered to these diabetic rats for 10 weeks. Body weight, physical activity, renal function, and renal morphometry were measured after 10 weeks of treatment. In the FPS-treated group, the levels of blood glucose, BUN, Ccr and Ucr decreased significantly, and microalbumin, serum insulin and the β2-MG content increased significantly. Moreover, the FPS-treated group showed improvements in renal morphometry. In summary, FPS can ameliorate the metabolic abnormalities of diabetic rats and delay the progression of diabetic renal complications.     

糖尿病性周围血管病患者血清中TM和EDHF的表达及意义

目的通过观察糖尿病性周围血管病患者血清中TM和EHDF的表达,探讨两者在该病中的意义.方法运用ELISA法检测32例糖尿病性周围血管病组、25例糖尿病组及20例正常组血清中TM与EDHF的表达,统计检测相关数据.结果糖尿病性周围血管病组及糖尿病组分别与正常组比较,两组血清中TM与EDHF明显高于正常组（P〈0.01）;糖尿病性周围血管病组与糖尿病组、正常组比较,血清中TM与EDHF显著高于后两组（P〈0.05）.相关性分析结果显示：TM与EDHF在糖尿病各组间血清中表达呈显著性正相关（P〈0.01）.结论 TM与EDHF参与糖尿病性周围血管病的发病过程,并且两者具有相关性,其可能在该病的发生、发展中起重要作用.     

富硒麦芽对链尿佐菌素诱发糖尿病大鼠糖脂代谢的影响

健康SD大鼠 72只随机分成 3组 ,正常对照组 (Ⅰ组 )和试验对照组 (Ⅱ组 )的饲料硒含量均为 0 1mg·kg-1;补富硒麦芽组 (Ⅲ组 )的饲料硒含量 0 3mg·kg-1。饲喂 5周后 ,Ⅱ、Ⅲ组用链尿佐菌素 (streptozotocin ,STZ)按每千克体重 6 0mg的剂量腹腔注射诱发糖尿病 ,Ⅰ组仅注射等剂量的缓冲液。继续饲喂 4周后观察各组大鼠抗氧化功能及糖、脂代谢变化。试验结果表明 ,补饲富硒麦芽能显著提高糖尿病大鼠胰岛素水平 ,降低血糖浓度 ;显著提高正常大鼠全血谷胱甘肽过氧化物酶 (GSH Px)活性 ,延缓糖尿病大鼠GSH Px和血浆超氧化物歧化酶活性下降趋势 ,降低血清胆固醇和甘油三酯浓度。提示补充适量的富硒麦芽 ,可增强STZ致糖尿病大鼠的抗氧化能力 ,降低血糖 ,降低脂质过氧化作用 ,改善糖、脂的代谢状态     

蜂胶对糖尿病大鼠蛋白质代谢的影响

将复制糖尿病模型的72只SD大鼠随机分为模型组，蜂胶水提取液1(WSP1)，蜂胶水提取液2(WSP2)蜂胶醇提取液1(EEP1)，蜂胶醇提取液2(EEP2)，阳性对照组(拜糖苹)，另取12只为正常组。除正常组和模型组外，各组分别给予不同的实验药物，给药7周后，抽血测总蛋白、白蛋白，同时计算球蛋白和白蛋白，球蛋白。结果发现，蜂胶能降低糖尿病大鼠体内蛋白质的消耗，升高糖尿病大鼠体内总蛋白、白蛋白水平，同时升高白蛋白，球蛋白的比值。表明蜂胶可以调节糖尿病大鼠体内蛋白质的代谢。     

补中益气丸对糖尿病大鼠胃组织MUC1、COX、NOS表达变化及相互作用

观察补中益气丸对糖尿病大鼠胃组织MuC1、COX-1、COX-2、cNOS、iNOS不同病程表达变化及其相互作用的影响、大鼠随机分为正常组。模型组和中药组,采用STZ腹腔注射结合乙醇灌胃的方法建立糖尿病大鼠胃黏膜损伤模型．检测胃组织NO、PGE2、6-ketoPC-F1d、MuCl、COX-1、cOX2、cNOS和iNOs随病程的表达变化及其相互作用。结果显示,糖尿病大鼠出现胃黏膜损伤和胃肠功能紊乱,胃组织MUC1、COX2、iNOS发生显著变化．MUC1随病程进展逐渐降低,iNOs和COX-2表现为早期活性降低,晚期活性升高,PGE2、6-keto—PGF1d和NO随病程显著升高,相关分析发现．COX1与cNOS呈显著正相关,与iNOS呈著负相关。补中益气丸能调节MUC1、COX-2、iNOS的表达及其相互作用,阻止胃黏膜损伤。结果表明,STZ腹腔注射结合乙醇灌胃的方法可成功诱导糖尿病大鼠胃黏膜损伤模型,iNOS与COX2可能为相互协作和相互介导的关系,在糖尿病胃黏膜损伤方面起重要作用,补中益气丸通过升高MUC1、降低iNOS和COX-2的表达及其相互作用,阻止胃黏膜损伤和糖尿病的发展。