Differences in platelet endothelial cell adhesion molecule-1 expression between peripheral circulation and pancreatic microcirculation in cerulein-induced acute edematous pancreatitis

AIM: To investigate the changes of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in peripheral circulation and pancreatic microcirculation in cerulein-induced acute edematous pancreatitis (AEP).METHODS: Fifty Wistar rats were randomly divided into control group (n=10) and AEP group (n=40). A model of AEP was established by subcutaneous injection of cerulein 5.5 and 7.5 μg/kg at 0 and 1 h after the beginning of experiment respectively. PECAM-1 expression on PMNs from splenic vein and inferior vena cava was determined by RT-PCR at mRNA level and determined by flow cytometry at protein level.RESULTS: In experimental rats, an increased PECAM-1mRNA expression was seen from 4 to 8 h of AEP in peripheral circulation (0.77±0.25%, 0.76±0.28%, 0.89±0.30%,1.00±0.21% ), while in pancreatic microcirculation,expression decreased from 2 h and reached the lowest level at 6 h of AEP (0.78±0.29%, 0.75±0.26%, 0.62±0.28%,0.66±0.20%). There were significant differences at 8-h time point of AEP between peripheral circulation and pancreatic microcirculation (1.00±0.21% vs0.66±0.20%, P＜0.05).Meanwhile,the difference at protein level was also found.CONCLUSION: A reverse expression of PECAM-1 on PMNs was found between peripheral circulation and pancreatic microcirculation, suggesting that inhibition of PECAM-1expression may improve the pathological change of AEP.

Expression of platelet endothelial cell adhesion molecule-1 between pancreatic microcirculation and peripheral circulation in rats with acute edematous pancreatitis

OBJECTIVE: To study the ehanges of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in peripheral circulation anti pancreatic microcirculation in rats with acute edematous pancreatitis (AEP). METHODS: The model of AEP was established with 50 Wistar rats, and the changes of PECAM-1 expression on PMNs from the splenic vein and inferior vena cava were determined by flow cytometry. RESULTS: PECAM-I expression on PMNs showed no significant difference between pancreatic microcirculation and peripheral circulation at AEP2h and AEP4h time points. From the AEP4h to the AEP8h time point, PECAM-1 expression in peripheral circulation was up-regulated, but PECAM-1 expression in pancreatic microcirculation was down-regulated. PECAM-1 expression had a significant difference between pancreatic microcirculation and peripheral circulation at the AEP8h time point (P<0.05). CONCLUSION: PECAM-1 expression on PMNs is in a converse way between pancreatic microcirculation and peripheral circulation in AEP.

Effects of TCMP-1 on the changes of platelet endothelial cell adhesion molecule-1 expression in acute edematous pancreatitis

BACKGROUND: Traditional Chinese medicine is a potent agent in the management of clinical and experimental acute pancreatitis (AP), but the molecular mechanism of its the- rapeutic action is unclear. Numerous experimental and clinical studies have shown that platelet endothelial cell ad- hesion molecule-1 (PECAM-1) is pivotal to leukocyte re- cruitment, which results in microcirculatory injury during inflammation, but its role in acute pancreatitis is poorly un- derstood. We investigated the effects of a compound of tra- ditional Chinese medicine pancreatitis-1 (TCMP-1) on the changes of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in acute edematous pancreatitis (AEP). METHODS: The model of acute pancreatitis was estab- lished by subcutaneous injection of caerulein, and TCMP-1 treated groups were given TCMP-1 by catheterization from mouth to stomach (20 ml/kg) immediately after first time subcutaneous injection of caerulein. The changes of expres- sion of PECAM-1 on leukocytes from the blood of the splenic vein and inferior vena cava were determined by flow cytometry. RESULTS: In the AEP group, expression of PECAM-1 on PMNs was not significantly different between pancreatic microcirculation and systemic circulation at AEP2h and AEP4h time point. Then from AEP4h time point to AEP8h time point, expression of PECAM-1 was up-regulated in systemic circulation while it was down-regulated in pancre- atic microcirculation and was significantly different be- tween pancreatic microcirculation and systemic circulation at AEP8h time point (P<0.05). In the TCMP-1 treated group, compared with the AEP group, expression of PE-CAM-1 on PMNs decreased in different levels between pan- creatic microcirculation and systemic circulation and was of significant difference at AEP8h time point (P <0.05). CONCLUSION: Inhibition of PECAM-1 expression on PMNs may prevent PMNs from transmigration through the endo- thelium and may be one of the treatment mechanisms of TCMP-1 decoction on AEP.

The relationship between platelet endothelial cell adhesion molecule-1 and paraquat-induced lung injury in rabbits

BACKGROUND:Platelet endothelial cell adhesion molecule-1(PECAM-1),also known as CD31,is mainly distributed in vascular endothelial cells.Studies have shown that PECAM-1 is a very significant indicator of angiogenesis,and has been used as an indicator for vascular endothelial cells.The present study aimed to explore the relationship between the expression of PECAM-1 and the degree of acute lung injury(ALI) and fibrosis in paraquat(PQ) induced lung injury in rabbits.METHODS:Thirty-six adult New Zealand rabbits were randomly divided into three groups(12rabbits in each group) according to PQ dosage:8 mg/kg(group A),16 mg/kg(group B),and 32 mg/kg(group C).After PQ infusion,the rabbits were monitored for 7 days and then euthanized.The lungs were removed for histological evaluation.Masson staining was used to determine the degree of lung fibrosis(LF),and semi-quantitative immune-histochemistry analysis to determine the expression of PECAM-1.Pearson's product-moment correlation analysis was performed to evaluate the relationship between the expression of PECAM-1 and the extent of lung injuries expressed by ALI score and degree of LF.RESULTS:Rabbits in the three groups showed apparent poisoning.The rabbits survived longer in group A than in groups B and C(6.47±0.99 days vs.6.09±1.04 days vs.4.77±2.04 days)(P<0.05).ALI score was lower in group A than in groups B and C(8.33±1.03 vs.9.83±1.17 vs.11.50±1.38)(P<0.05),and there was statistically significant difference between group B and group C(P=0.03).LF was slighter in group A than in groups B and C(31.09%±2.05%vs.34.37%±1.62%vs.36.54%±0.44%)(P<0.05),and there was statistically significant difference between group B and group C(P=0.026).The PEACAM-1 expression was higher in group A than in groups B and C(20.31%±0.70%vs.19.34%±0.68%vs.18.37%±0.46%)(P<0.05),and there was statistically significant difference between group B and group C(P=0.017).Pearson's correlation analysis showed that the expression of PECAM-1 was negatively correlated to both ALI score(Coe=-0.732,P=0.001)and degree of LF(Coe=-0.779,P<0.001).CONCLUSIONS:The PECAM-1 expression significantly decreases in New Zealand rabbits after PQ poisoning,and the decrease is dose-dependent.The PECAM-1 expression is negatively correlated with ALI score and LF,showing a significant role in the development of lung injuries induced by PQ.

Changes in serum cellular adhesion molecule and matrix metalloproteinase-9 levels in patients with cerebral infarction following hyperbaric oxygen therapy A case and intergroup control study

BACKGROUND： Animal studies have confirmed that hyperbaric oxygen （HBO） therapy can reduce matrix metalloproteinase activity and blood brain barrier permeability, thereby exhibiting neuroprotective effects. However, at present, consensus does not exist in terms of its clinical efficacy. OBJECTIVE： To validate the significance of changes in serum cellular adhesion molecule and MMP-9 levels in patients with cerebral infarction following HBO therapy. DESIGN, TIME AND SETTING： This randomized, controlled, neurobiochemical study was performed at the Department of Neurology, Affiliated Hospital of Qingdao University Medical College between December 2002 and March 2006. PARTICIPANTS： A total of 112 patients with acute cerebral infarction of internal carotid artery, comprising 64 males and 48 females, averaging （67 ±11） years, were recruited and randomized to a HBO group （n = 50） and a routine treatment group （n = 62）. An additional 30 gender- and age-matched normal subjects, consisting of 17 males and 13 females, averaging （63 ± 9） years, were enrolled as control subjects. METHODS： The routine treatment group received routine drug treatment and rehabilitation exercise. HBO treatment was additionally performed in the HBO group, once a day, for a total of 10 days. MAIN OUTCOME MEASURES： Serum levels of soluble intercellular adhesion molecule, soluble vascular cell adhesion molecule, soluble E-selectin, and matrix metalloproteinase-9 were detected by enzyme linked immunosorbent assay. RESULTS： Upon admission, serum levels of soluble intercellular adhesion molecule, soluble vascular cell adhesion molecule, soluble E-selectin, and matrix metalloproteinase-9 were significantly increased in patients with cerebral infarction, compared with control subjects （P 〈 0.01）. Following HBO and routine treatments, serum levels of the above-mentioned indices were significantly reduced in the HBO and routine treatment groups （P 〈 0.01）. Moreover, greater efficacy was observed in the HBO group, compared with the routine treatment group （P 〈 0.05 or P 〈 0.01）. CONCLUSION： Intergroup comparison and case-control results indicated that HBO noticeably reduced serum levels of soluble intercellular adhesion molecule, soluble vascular cell adhesion molecule, soluble E-selectin, and matrix metalloproteinase-9.

Hypoxia Inhibits Proliferation of Human Dermal Lymphatic Endothelial Cells via Downregulation of Carcinoembryonic Antigen-related Cell Adhesion Molecule 1 Expression

Objective:Lymphatic endothelial cell(LEC)proliferation is essential for lymphangiogenesis.Hypoxia induces lymphangiogenesis,but it directly inhibits LEC proliferation and the underlying mechanisms have not been fully understood.The aim of this study was to investigate the role of carcinoembryonic antigen-related cell adhesion molecule 1(CEACAM1)in hypoxia-repressed LEC proliferation.Methods:Human dermal lymphatic endothelial cells(HDLECs)were cultured under normoxic or hypoxic conditions,and cell proliferation was determined using MTT or CCK-8 assays.CEACAM1 expression was silenced by siRNA transfection.Activation of mitogen-activated protein kinases(MAPKs)was examined by Western blotting and blocked by specific inhibitors.Results:Under hypoxia,HDLECs proliferation was suppressed and CEACAM1 expression was downregulated.Silence of CEACAM1 in normoxia inhibited HDLECs proliferation and did not further decrease proliferation in HDLECs in response to hypoxia,suggesting that CEACAM1 may mediate hypoxia-induced inhibition of HDLECs proliferation.In addition,silence of CEACAM1 increased phosphorylation of MAPK molecules:extracellular signal-regulated kinase(ERK),p38 MAPK and Jun N-terminal kinase(JNK)in HDLECs.However,only inhibition of the JNK pathway rescued the reduction of HDLEC proliferation induced by CEACAM1 silence.Conclusion:Our results suggested that hypoxia downregulates CEACAM1 expression by activation of the JNK pathway,leading to inhibition of HDLEC proliferation.These findings may help to understand the mechanisms of LEC-specific response to hypoxia and develop novel therapies for pathological lymphangiogenesis.

Integrin binding peptides facilitate growth and interconnected vascular-like network formation of rat primary cortical vascular endothelial cells in vitro

Neovascularization and angiogenesis in the brain are important physiological processes for normal brain development and repair/regeneration following insults. Integrins are cell surface adhesion receptors mediating important function of cells such as survival, growth and development during tissue organization, differentiation and organogenesis. In this study, we used an integrin-binding array platform to identify the important types of integrins and their binding peptides that facilitate adhesion, growth, development, and vascular-like network formation of rat primary brain microvascular endothelial cells. Brain microvascular endothelial cells were isolated from rat brain on post-natal day 7. Cells were cultured in a custom-designed integrin array system containing short synthetic peptides binding to 16 types of integrins commonly expressed on cells in vertebrates. After 7 days of culture, the brain microvascular endothelial cells were processed for immunostaining with markers for endothelial cells including von Willibrand factor and platelet endothelial cell adhesion molecule. 5-Bromo-2′-dexoyuridine was added to the culture at 48 hours prior to fixation to assess cell proliferation. Among 16 integrins tested, we found that α5β1, αvβ5 and αvβ8 greatly promoted proliferation of endothelial cells in culture. To investigate the effect of integrin-binding peptides in promoting neovascularization and angiogenesis, the binding peptides to the above three types of integrins were immobilized to our custom-designed hydrogel in three-dimensional(3 D) culture of brain microvascular endothelial cells with the addition of vascular endothelial growth factor. Following a 7-day 3 D culture, the culture was fixed and processed for double labeling of phalloidin with von Willibrand factor or platelet endothelial cell adhesion molecule and assessed under confocal microscopy. In the 3 D culture in hydrogels conjugated with the integrin-binding peptide, brain microvascular endothelial cells formed interconnected vascular-like network with clearly discernable lumens, which is reminiscent of brain microvascular network in vivo. With the novel integrin-binding array system, we identified the specific types of integrins on brain microvascular endothelial cells that mediate cell adhesion and growth followed by functionalizing a 3 D hydrogel culture system using the binding peptides that specifically bind to the identified integrins, leading to robust growth and lumenized microvascular-like network formation of brain microvascular endothelial cells in 3 D culture. This technology can be used for in vitro and in vivo vascularization of transplants or brain lesions to promote brain tissue regeneration following neurological insults.

Effect of Batroxobin on Expression of Neural Cell Adhesion Molecule in Temporal Infarction Rats and Spatial Learning and Memory Disorder

The effect of Batroxobin expression of neural cell adhesion molecule (NCAM) in left temporal ischemic rats with spatial memory disorder was investigated by means of Morri's water maze and immunohistochemical methods. The results showed that the mean reaction time and distance of temporal ischemic rats for searching a goal were significantly longer than those of sham-operated rats and at the same time NCAM expression of left temporal ischemic region was significantly increased. However, the mean reaction time and distance of Batroxobin-treated rats were shorter and they used normal strategies more often and earlier than those of ischemic rats. The number of NCAM immune reactive cells of Batroxobin-treated rats was more than that of ischemic group. In conclusion, Batroxobin can improve spatial memory disorder of temporal ischemic rats and the regulation of the expression of NCAM is probably related to the neuroprotective mechanism.

The role of adhesion molecules in gastri c ulcer healing

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Knockdown of CD146 reduces the migration and proliferation of human endothelial cells

我们的以前的学习证明了那个 CD146 分子是脉管的内皮细胞层上的一个简历标记，它涉及 angiogenesis 和肿瘤生长。然而机制在后面不是清楚的。这里，我们第一次用 CD146 siRNA 开发了一个新奇 CD146 封锁系统在 endothelial 房间上学习它的功能。我们的数据证明 CD146 siRNA 明确地在 mRNA 和蛋白质层次上堵住了 CD146 的表达式，导致 HUVEC 增长，粘附和移植的重要抑制。这些结果证明 CD146 在脉管的 endothelial 房间活动和 angiogenesis 起一个关键作用，并且 CD146 siRNA 能为 anti-angiogenesis 治疗被用作一个新禁止者。

Molecular and cellular changes in the post-traumatic spinal cord remodeling after autoinfusion of a genetically-enriched leucoconcentrate in a mini-pig model

Post-traumatic spinal cord remodeling includes both degenerating and regenerating processes,which affect the potency of the functional recovery after spinal cord injury(SCI).Gene therapy for spinal cord injury is proposed as a promising therapeutic strategy to induce positive changes in remodeling of the affected neural tissue.In our previous studies for delivering the therapeutic genes at the site of spinal cord injury,we developed a new approach using an autologous leucoconcentrate transduced ex vivo with chimeric adenoviruses(Ad5/35)carrying recombinant cDNA.In the present study,the efficacy of the intravenous infusion of an autologous genetically-enriched leucoconcentrate simultaneously producing recombinant vascular endothelial growth factor(VEGF),glial cell line-derived neurotrophic factor(GDNF),and neural cell adhesion molecule(NCAM)was evaluated with regard to the molecular and cellular changes in remodeling of the spinal cord tissue at the site of damage in a model of mini-pigs with moderate spinal cord injury.Experimental animals were randomly divided into two groups of 4 pigs each:the therapeutic(infused with the leucoconcentrate simultaneously transduced with a combination of the three chimeric adenoviral vectors Ad5/35‐VEGF165,Ad5/35‐GDNF,and Ad5/35‐NCAM1)and control groups(infused with intact leucoconcentrate).The morphometric and immunofluorescence analysis of the spinal cord regeneration in the rostral and caudal segments according to the epicenter of the injury in the treated animals compared to the control mini-pigs showed:(1)higher sparing of the grey matter and increased survivability of the spinal cord cells(lower number of Caspase-3-positive cells and decreased expression of Hsp27);(2)recovery of synaptophysin expression;(3)prevention of astrogliosis(lower area of glial fibrillary acidic protein-positive astrocytes and ionized calcium binding adaptor molecule 1-positive microglial cells);(4)higher growth rates of regeneratingβIII-tubulin-positive axons accompanied by a higher number of oligodendrocyte transcription factor 2-positive oligodendroglial cells in the lateral corticospinal tract region.These results revealed the efficacy of intravenous infusion of the autologous genetically-enriched leucoconcentrate producing recombinant VEGF,GDNF,and NCAM in the acute phase of spinal cord injury on the positive changes in the post-traumatic remodeling nervous tissue at the site of direct injury.Our data provide a solid platform for a new ex vivo gene therapy for spinal cord injury and will facilitate further translation of regenerative therapies in clinical neurology.

Molecular basis of the adhesive process of polymorphonuclear neutrophils to vascular endothelial cells under endotoxin condit

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Effects of cardiopulmonary bypass on endothelial cell injury

Objective: To observe the changes of plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin in children undergoing cardiac procedure and to study the effects of cardiopulmonary bypass (CPB) on the injury or activation of endothelial cells and vascular permeability. Methods: Twenty children undergoing cardiac operation with CPB were selected in the study. Plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin were measured after anesthetic induction (baseline), bypass for 20 minutes, at the end of CPB, and at 2, 4, and 18 h after the end of CPB. Results: The plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, and urinary microalbumin began to increase at 2 h after the end of CPB, and remained higher than that of the baseline, while the concentration of tumor necrosis factor α increased only at the end CPB and at 2 h after the end of CPB. Conclusion: Cardiopulmonary bypass can induce inflammatory response, resulting in the activation or injury of vascular endothelial cells, and can increase the vascular permeability.

血清ESM-1、E-cad对ACI-LAA溶栓后HT的预测价值

目的 探讨血清内皮细胞特异性分子-1 (ESM-1)、E-钙黏连蛋白(E-cad)对大动脉粥样硬化型脑梗死(ACI-LAA)溶栓后出血转化(HT)的预测价值。方法 选取2020年1月至2022年12月新疆医科大学第一附属医院收治的110例ACI-LAA患者,根据是否发生HT分为HT组和non-HT组。对比两组基础资料及血清ESM-1、E-cad水平。采用ROC曲线分析ESM-1、E-cad预测ACI-LAA患者发生HT的价值。结果 HT组患者NIHSS评分高于non-HT组,梗死面积大于non-HT组(P <0.05),HT组患者血清ESM-1、E-cad水平也高于non-HT组(P<0.05)。Logistic回归分析显示,梗死面积大、NIHSS评分高、血清ESM-1和E-cad水平升高是ACI-LAA患者发生HT的危险因素(P<0.05)。ESM-1联合E-cad预测ACI-LAA患者发生HT的曲线下面积为0.859,预测灵敏度为84.6%,特异度为72.6%。结论 血清ESM-1和E-cad水平与ACI-LAA患者HT密切相关,可作为早期预测发生HT的参考指标。

高糖诱导下人脐静脉内皮细胞形态、增殖活性及钙黏蛋白表达变化

目的探讨不同糖浓度状态下人脐静脉内皮细胞(HUVECs)形态、增殖活性及VE-钙黏蛋白(VE-cadherin)、E-钙黏蛋白(E-cadherin)、N-钙黏蛋白(N-cadherin)表达变化。方法将HUVECs分为正常对照组(葡萄糖浓度5.5 mmol/L)、甘露醇组(葡萄糖浓度5.5 mmol/L+甘露醇浓度24.5 mmol/L)、高糖组(葡萄糖浓度分别为11.1、22.2、33.3 mmol/L),分别培养24、48、72 h,以显微镜观察细胞形态,用CCK-8法检测各组细胞增殖情况,Western blotting法检测各组HUVECs VE-cadherin、E-cadherin、N-cadherin表达。结果培养72 h,正常对照组细胞形态呈类圆形,高糖组、甘露醇组细胞形态由圆形、椭圆形逐渐到条索状,细胞数量减少、细胞间隙较前增加。培养24h,高糖组细胞增殖率高于正常对照组;随糖浓度升高,高糖组细胞增殖率呈现先升高后降低趋势。培养48、72h,高糖组细胞增殖率低于正常对照组;随着糖浓度升高,高糖组细胞增殖率逐渐降低。以上各组细胞增殖率比较均有统计学差异(P均<0.05)。培养24、72 h,与正常对照组比较,高糖组HUVECsN-cadherin、VE-cadherin、E-cadherin蛋白表达明显升高(P均<0.05);且随着葡萄糖浓度升高,高糖组细胞N-cadherin、VE-cadherin、E-caderin蛋白表达呈现先升高后降低的趋势。结论在高糖条件下,HUVECs发生形态转变,增殖率下降,且伴有细胞钙黏蛋白N-cadherin、VE-cadherin、E-cadherin表达变化。

血小板内皮细胞黏附分子1和平滑肌肌动蛋白对瘢痕疙瘩综合治疗预后的影响

目的:探究瘢痕疙瘩血管内血小板内皮细胞黏附分子1(platelet endothelial cell adhesion molecule-1,PECAM-1)与平滑肌肌动蛋白(smooth muscle actin,SMA)的表达水平对瘢痕疙瘩综合治疗预后的影响。方法:回顾性分析2020年8月至2022年6月江苏大学附属医院皮肤科门诊收治的瘢痕疙瘩患者61例,共计69处瘢痕疙瘩,均接受手术切除与^(90)Sr同位素敷贴综合治疗,免疫组织化学染色检测手术切除瘢痕疙瘩标本血管内PECAM-1及SMA表达水平,电话及门诊随访6个月。结果:19处(27.5%)瘢痕疙瘩6个月内复发,11处(15.9%)在^(90)Sr同位素敷贴治疗后发生不良反应,复发组PECAM-1与SMA的高表达率均高于未复发组(χ^(2)=7.496,P=0.006;χ^(2)=5.197,P=0.023);治疗后不良反应发生率与PECAM-1及SMA的表达水平无明显关系(χ^(2)=0.172,P=0.935;χ^(2)=1.110,P=0.484)。结论:瘢痕疙瘩血管内PECAM-1及SMA的表达水平与综合治疗预后呈负相关,二者可能是判断瘢痕疙瘩预后的潜在指标。

急性心肌梗死患者外周血内皮细胞微粒miR-126和线粒体成分及黏附分子表达水平及其临床意义研究

背景急性心肌梗死(AMI)是常见的心血管疾病之一,尽管目前心肌坏死的生物标志物被广泛应用,但AMI的发病率和死亡率仍然居高不下。目的探究内皮细胞微粒(EMPs)内含miR-126、线粒体成分、黏附分子的表达水平及临床意义。方法纳入2021年9月—2022年9月于新疆维吾尔自治区人民医院就诊的AMI患者50例(AMI组)、稳定性冠心病(SCAD)患者50例(SCAD组)、健康者50例(Control组),AMI患者和SCAD患者均在本院住院并接受冠状动脉介入治疗(PCI),健康者均经过本院体检中心的评估。收集三组外周血标本及一般资料,利用透射电镜观察微粒的形态,流式细胞术鉴定EMPs水平,荧光定量PCR检测EMPs中miR-126的表达,ELISA检测EMPs中线粒体活性氧(ROS)及内含黏附分子[血管细胞黏附分子1(VCAM-1)、细胞间黏附分子1(ICAM-1)、E-选择素、P-选择素]的水平。结果通过透射电镜观察到,分离的微粒膜结构完整,直径在100~400 nm。与Control组相比,AMI组血浆EMPs中miR-126表达水平下降(P<0.001),ROS表达水平升高(P<0.001),VCAM-1表达水平升高(P=0.019),ICAM-1表达水平升高(P<0.001),E-选择素表达水平升高(P=0.019),P-选择素表达水平升高(P<0.001)。多因素Logistic回归分析结果显示,miR-126表达水平降低(OR=0.026,95%CI=0.003~0.210,P=0.001)是AMI的保护因素,ROS(OR=1.009,95%CI=1.005~1.013,P<0.001)、P-选择素表达水平升高(OR=1.063,95%CI=1.022~1.105,P=0.002)是AMI的危险因素。受试者工作特征(ROC)曲线显示,miR-126诊断AMI的ROC曲线下面积(AUC)为0.816,ROS诊断AMI的AUC为0.892,P-选择素诊断AMI的AUC为0.728,miR-126、ROS、P-选择素联合诊断AMI的AUC为0.950。结论EMPs中miR-126、ROS、P-选择素以及三者联合指标均对AMI有诊断价值,并且三者联合指标诊断价值最高,这表明其可能为AMI患者的潜在诊断指标。

ACI患者血清APN、Lp-PLA2、PECAM-1水平与出院后一年认知功能障碍的相关性探讨

目的 探讨急性脑梗死(ACI)患者出院时血清脂联素(APN)、脂蛋白相关磷脂酶A2(Lp-PLA2)、血小板内皮细胞黏附分子-1 (PECAM-1)水平与长期认知功能障碍(PSCI)的相关性,为临床预测PSCI提供相关标志物。方法 选取新疆维吾尔自治区人民医院2020年8月至2022年1月ACI患者108例,根据出院后1年时是否存在PSCI,分为认知正常组(77例)与认知障碍组(31例)。比较两组临床基本资料及入院时、出院时血清APN、Lp-PLA2、PECAM-1水平,分析血清APN、Lp-PLA2、PECAM-1水平与长期PSCI的相关性。结果 认知障碍组出院后1年简易精神状态评价量表(MMSE)评分为(22.13±2.06)分,低于认知正常组(29.14±0.31)分(P<0.05);两组年龄、神经功能缺损程度、合并糖尿病、糖化血红蛋白(HbAlc)、同型半胱氨酸(Hcy)水平差异有统计学意义(P<0.05);认知障碍组出院时血清APN水平低于认知正常组,Lp-PLA2、PECAM-1水平高于认知正常组(P<0.05);出院时血清APN水平与出院后1年MMSE评分呈正相关,Lp-PLA2、PECAM-1水平与出院后1年MMSE评分呈负相关(r=0.727、-0.667、-0.750,均P<0.05);Logistic回归分析,将其他因素校正前后,出院时血清APN、Lp-PLA2、PECAM-1水平均与ACI患者长期PSCI独立相关(P<0.05);出院时血清APN、LpPLA2、PECAM-1水平预测ACI患者长期PSCI的AUC分别为0.783 (95%CI:0.693~0.857)、0.736 (95%CI:0.643~0.817)、0.827 (95%CI:0.743~0.893),联合预测ACI患者长期PSCI的AUC为0.936 (95%CI:0.872~0.974),优于3者单独预测。结论 ACI患者出院时血清APN、Lp-PLA2、PECAM-1水平与长期PSCI独立相关,可作为临床早期预测指标,且联合预测价值可靠。

大黄牡丹汤加味治疗溃疡性结肠炎(大肠湿热证)的临床观察

目的观察大黄牡丹汤加味治疗溃疡性结肠炎(UC)(大肠湿热证)的临床疗效。方法将98例患者根据随机数字表法分为中西医联合组与单纯西药组各49例。单纯西药组予美沙拉嗪缓释颗粒口服,中西医联合组加用大黄牡丹汤口服。比较两组治疗效果、疾病活动改善评分、临床症状和肠黏膜病变评分、血清细胞间黏附分子-1(ICAM-1)与血管细胞黏附分子(VCAM-1)水平。结果2周疗程结束后,中西医联合组总有效率为93.88%,显著高于单纯西药组的75.51%(P<0.05);两组改良Mayo评分显著降低,且中西医联合组降低更显著(P<0.05);两组主要症状与肠黏膜病变评分显著降低,且中西医联合组降低更显著(P<0.05);两组血清ICAM-1与VCAM-1水平显著下降,且中西医联合组下降更明显(P<0.05)。结论大黄牡丹汤加味治疗UC(大肠湿热证)患者的效果明显,能促进病情的控制,并下调血清ICAM-1与VCAM-1水平。

清化瘀毒方对CCl4肝纤维化模型大鼠PPARγ配体诱导信号介导途径的影响及与相关细胞因子的关系研究

目的探讨清化瘀毒方对四氯化碳(CCl4)肝纤维化模型大鼠PPARγ配体(PPARγ)诱导信号介导途径的影响及与相关细胞因子的关系。方法将50只SD大鼠按照随机数字法分为空白组、模型组,清化瘀毒方高剂量干预组(高剂量组)、中剂量干预组(中剂量组)及低剂量干预组(低剂量组),每组各10只。模型组采用腹腔注射50%的CCl4橄榄油溶液建模,空白组大鼠采用腹腔注射等量0.9%氯化钠注射液。造模成功后空白组、模型组分别以等量0.9%氯化钠注射液灌胃,清化瘀毒方(每1 ml含生药0.1 g)低剂量组、中剂量组及高剂量组分别以50、100及200 mg·kg^(-1)·d^(-1)灌服,共计8周。比较5组肝组织病理学;免疫荧光法检测PPARγ、抗体Tolls样受体2(TLR2),免疫组化的方法检测血管内皮生长因子A(VEGF-A)、碱性成纤维细胞生长因子(bFGF)和低氧诱导因子-1α(HIF-1α)治疗干预后的表达;ELISA法检测细胞间黏附分子-1(ICAM-1)、血管内皮细胞黏附分子-1(VCAM-1)的相关表达。结果与空白组比较,各组TLR2、VEGF-A、bFGF、HIF-1α、ICAM-1和VCAM-1表达增强,清化瘀毒方低、中、高剂量干预组与模型组相比,明显减少。与空白组相比较,模型组PPARγ表达降低,清化瘀毒方治疗干预后,各组PPARγ表达增强。结论清化瘀毒方可以调控PPARγ、VEGF-A及HIF-1α,通过调节血管生成细胞因子的产生、迁移、黏附和收缩激活PPARγ及配体诱导信号,从而改善模型大鼠的肝损伤,血管生成和血管重构,达到抗肝纤维化作用。