sFlt-1mRNA在子痫前期患者胎盘中的表达

目的检测可溶性血管内皮生长因子受体-1（soluble fms-like tyrosine kinase-1,sFlt-1）在子痫前期胎盘组织中的mRNA表达水平,探讨其在子痫前期发生发展中的作用。方法用半定量逆转录聚合酶链反应（RT-PCR）技术检测25例子痫前期患者（轻度（n=8）,重度（n=17））和15例正常妊娠孕妇。结果（1）sFlt-1mRNA在正常孕妇、轻度和重子痫前期患者胎盘组织中均有表达。（2）sFlt-1mRNA的表达水平在轻度和重度子痫前期组均高于正常组,差别有显著性（P〈0.01）。结论胎盘组织中sFlt-1mRNA的过度表达可能与子痫前期的发病有关,并参与了子痫前期的病理生理过程。     

Associations between insulin-like growth factor I,vascular endothelial growth factor and its soluble receptor 1 in umbilical serum and endothelial cells obtained from normotensive and preeclamptic pregnancies

Abstract

The aim of this study was to investigate the associations between insulin-like growth factor I (IGF-I) with vascular endothelial growth factor (VEGF) and its soluble receptor 1 (sFlt-1) in umbilical serum and to study the effects of IGF-I upon sFlt-1 synthesis in human umbilical vein endothelial cells (HUVEC) in normotensive (NT) and preeclamptic (PE) pregnancies. As compared with the NT group, umbilical serum IGF-I and VEGF levels were lower in the PE group, while sFlt-1 concentrations were higher. Levels of sFlt-1 correlated with IGF-I in the NT group and with VEGF in the PE group. Basal concentration of sFlt-1 in HUVEC culture media was higher in the PE group. IGF-I stimulated sFlt-1 synthesis only in the NT group. In summary, umbilical serum sFlt-1 is associated with IGF-I in normotensive pregnancy and with VEGF in preeclampsia. IGF-I stimulates sFlt-1 synthesis in endothelial cells in normotensive but not in PE pregnancies.     

The levels of circulating vascular endothelial growth factor and soluble Flt-1 in pregnancies complicated by preeclampsia

To evaluate the role of vascular endothelial growth factor (VEGF) in the pathogenesis of preeclampsia, we measured total VEGF, free VEGF and soluble Flt-1 (sFlt-1) concentrations and determined their relationships. Maternal serum samples were collected from 20 patients with preeclampsia and 20 normotensive women with uncomplicated pregnancies matched with the patients with preeclampsia for gestational age and parity. The serum concentrations of total VEGF (2.39+/-0.75 vs. 0.28+/-0.14) and sFlt-1 (934.5+/-235.5 vs. 298.0+/-161.2) were significantly increased in the patients with preeclampsia compared to the women with uncomplicated pregnancies. However the serum concentration of free VEGF (21.5+/-6.3 vs. 134.0+/-16.3) was lower in patients with preeclampsia. There was a positive correlation between the serum concentrations of total VEGF and sFlt-1 with systolic and diastolic blood pressure, respectively. There was a negative correlation between the serum concentration of free VEGF and systolic and diastolic blood pressure. There was a strong negative correlation between free VEGF and sFlt-1 concentrations. In conclusion, we found VEGF and sFlt-1 were related to the pathogenesis of preeclampsia. Although reduced concentrations of free VEGF might interfere with endothelial cell function and survival, further studies are required to clarify its specific role in the pathogenesis of preeclampsia.     

Increased expression of thioredoxin-1, vascular endothelial growth factor, and redox factor-1 is associated with poor prognosis in patients with liver metastasis from colorectal cancer

We examined whether the expression of thioredoxin-1 (Trx-1) was associated with patient prognosis after liver resection for metastatic colorectal cancer. Eighty-four patients underwent resection of liver metastases from colorectal cancer, leaving no macroscopic evidence of residual tumor. Immunohistochemical study was performed to evaluate the relation among Trx-1, vascular endothelial growth factor (VEGF), and redox factor-1 (Ref-1) expression and the clinicopathologic characteristics and patient survival. Thirty-seven patients (44.0%) with Trx-1-positive metastases had shorter survival after primary liver resection (P = .0003) than the 47 patients (56.0%) with Trx-1-negative metastases. The percentage VEGF-positive and Ref-1-positive metastases was significantly higher in patients with Trx-1 expression (P = .0009 and .0002, respectively). Multivariate analysis revealed that Trx-1 expression was an independent prognostic factor. Expression of VEGF and Ref-1 is associated with Trx-1 overexpression, which is related to a poor prognosis in patients with liver metastases from colorectal cancer.     

Expression of vascular endothelial growth factor and vascular endothelial growth factor receptors 1 and 2 in invasive breast carcinoma: prognostic significance and relationship with markers for aggressiveness

Dhakal H P, Naume B, Synnestvedt M, Borgen E, Kaaresen R, Schlichting E, Wiedswang G, Bassarova A, Holm R, Giercksky K‐E & Nesland J M
(2012) Histopathology  61, 350–364 Expression of vascular endothelial growth factor and vascular endothelial growth factor receptors 1 and 2 in invasive breast carcinoma: prognostic significance and relationship with markers for aggressiveness Aims: Vascular endothelial growth factor (VEGF), VEGF receptor 1 (VEGFR‐1) and VEGF receptor 2 (VEGFR‐2) play a role in breast cancer growth and angiogenesis. We examined the expression and relationship with clinical outcome and other prognostic factors. Methods and results: Tumour sections from 468 breast cancer patients were immunostained for VEGF, VEGFR‐1, and VEGFR‐2, and their relationships with tumour vascularity, disseminated tumour cells (DTCs) in bone marrow and other clinicopathological parameters were evaluated. VEGF, VEGFR‐1 and VEGFR‐2 immunoreactivities were observed in invasive breast carcinoma cells. VEGF expression was significantly associated with VEGFR‐1 and VEGFR‐2 expression (P < 0.001). High‐level cytoplasmic expression of VEGFR‐1 was associated with significantly reduced distant disease‐free survival (DDFS) (P = 0.017, log‐rank) and breast cancer‐specific survival (BCSS) (P = 0.005, log‐rank) for all patients, and for node‐negative patients without systemic treatment (DDFS, P = 0.03, log‐rank; BCSS, P = 0.009, log‐rank). VEGFR‐1 expression was significantly associated with histopathological markers of aggressiveness (P < 0.05). Significantly reduced survival was observed in DTC‐positive patients as compared with DTC‐negative patients in the combined moderate/high VEGFR‐1 group (P < 0.001 for DDFS and BCSS), and the same was true for DDFS in the moderate VEGFR‐2 group (P = 0.006). Conclusions: High‐level expression of VEGFR‐1 indicates reduced survival. Higher‐level expression of VEGFR‐1 or VEGFR‐2 in primary breast carcinomas combined with the presence of DTC selects a prognostically unfavourable patient group.     

An infant with deletion of the distal long arm of chromosome 15 (q26.1→qter) and loss of insulin-like growth factor 1 receptor gene

We report on an infant with a previously undescribed chromosome 15 deletion (q26.1→qter) and compare the clinical findings with those of 7 reported patients with deletions of distal 15q, as well as ring chromosome 15 syndrome patients. Most of the patients with deletions of distal 15q, including our patient, have intrauterine growth retardation (IUGR), microcephaly, abnormal face and ears, micrognathia, highly arched palate, renal abnormalities, lung hypoplasia, failure to thrive, and developmental delay/mental retardation. Several genes have been assigned to the 15q25→qter region, including insulin-like growth factor 1 receptor (IGF1R). DNA analysis from our patient documented the loss of one IGF1R gene copy. Our study further localizes the IGF1R gene distal to the 15q26.1 band. It is interesting to speculate that the severe IUGR and postnatal growth deficiency of our patient and other patients with similar chromosome 15 deletions are related to the loss of an IGF1R gene copy which may lead to an abnormal number and/or structure of the receptors.     

葡萄糖转运蛋白1、人类血管内皮生长因子C、核因子κB在乳腺浸润性导管癌组织中的表达及其对患者预后的影响

目的 探讨葡萄糖转运蛋白1(GLUT-1)、人类血管内皮生长因子C(VEGF-C)、核因子κB(NF-κB)在乳腺浸润性导管癌组织中的表达及其对患者预后的影响。方法 回顾性研究。纳入2011年1月-2014年11月蚌埠市第三人民医院117例乳腺浸润性导管癌患者(年龄20~79岁)的临床资料及癌组织病理学标本,并随机采集其中51例患者的癌旁组织标本。以免疫组织化学法检测标本中GLUT-1、VEGF-C、NF-κB的表达,比较其在癌组织和癌旁组织中表达量的差异,分析阳性表达与浸润性导管癌临床病理因素的关系,及其对临床预后的影响。结果 GLUT-1、NF-κB、VEGF-C在浸润性导管癌组织中阳性表达率高于癌旁组织,差异均有统计学意义(χ²=45.785、48.433、48.236, P值均<0.01)。GLUT-1、NF-κB、VEGF-C在不同肿瘤大小、有无淋巴浸润、不同TNM分期和病理分级患者阳性表达率的差异均有统计学意义(P值均<0.05)。117例浸润性导管癌患者中,失访7例,死亡32例。110例随访的乳腺浸润性导管癌患者中,GLUT-1阳性表达患者的5年生存率(21.82%)显著低于阴性表达患者(77.09%),差异有统计学意义(χ²=10.854,P<0.01);NF-κB、VEGF-C阳性表达与阴性表达患者5年生存率差异均无统计学意义(χ²=0.843、0.852,P值均>0.05)。结论 GLUT-1、VEGF-C、NF-κB表达升高可能参与了乳腺浸润性导管癌的侵袭进展过程,其中GLUT-1是影响患者预后的高风险因素。     

Serum levels of macrophage colony stimulating, vascular endothelial, and placenta growth factor in relation to later clinical onset of pre-eclampsia and a small-for-gestational age birth

PROBLEM: The multisystem disorder of pre-eclampsia (PE) becomes manifest in late gestation, but the pathology originates in early pregnancy by the deleterious action of placental substances to the maternal endothelial system. These factors were searched for in the attempt to identify, as early as possible, the pregnancies with an increased risk of developing pre-eclampsia. The literature is equivocal regarding the usefulness of various markers including vascular endothelial growth factor (VEGF) and macrophage colony-stimulating factor (M-CSF). Results are often confounded by a varying fraction of pregnancies affected by foetal growth restriction (FGR) amongst the case and control groups. METHOD OF STUDY: In a nested case-control study we compared the serum levels of M-CSF, VEGF, and placenta growth factor (PLGF) in 23 pregnancies with subsequent mild PE without FGR and nine FGR pregnancies without PE with 40 matched controls at 17, 25, and 33 weeks of gestation cross-sectionally and longitudinally. RESULTS: VEGF levels were reduced in FGR but not in subsequently pre-eclamptic pregnancies at 17, 25, and 33 weeks. In contrast, PLGF was reduced in the PE but not in the FGR group. M-CSF did not differ between the three groups. CONCLUSION: Depending on which growth factor is found to be reduced, an early distinction can be made in terms of an increased risk for PE or FGR. Inconsistencies in the literature may reflect differences in PE disease severity between studies and the presence of a varying fraction of cases with FGR.     

血管内皮生长因子C及其受体表达与肝细胞癌侵袭转移的关系

目的 研究人肝细胞癌(HCC)组织中血管内皮生长因子C(VEGF-C)、血管内皮生长因子受体2(VEGFR-2)及VEGFR-3表达与HCC临床病理特征之间的关系.方法 取HCC石蜡切片标本50例及正常肝组织标本15例,免疫组化法检测止常肝组织及HCC组织中VEGF-C、VEGFR-2及VEGFR-3表达,分析其与HCC临床病理特征之间的关系.结果 (1)HCC组织中VEGF-C、VEGFR-2及VEGFR-3表达阳性率高于正常肝组织(62%比26.7%,34%比6.7%,40%比0%,P均<0.05).(2)HCC组织中,VEGF-C表达与肝内转移、门静脉癌柃形成及肝门淋巴结转移有关(P<0.05);VEGFR-2表达与肝内转移及门静脉癌栓形成有关(P<0.05);VEGFR-3表达与肝门淋巴结转移有关(P<0.05).结论 HCC组织中VEGF-C、VEGFR-2及VEGFR-3表达与HCC的侵袭及转移有密切关系.     

早中期食管鳞状细胞癌中Notch1与血管内皮生长因子C的表达及其意义

目的 研究Notch1与血管内皮生长因子C(VEGF-C)在早中期食管鳞状细胞癌(ESCC)中的表达及其与临床病理特征的关系.方法 收集2007年5月至12月在本院行食管癌根治术的40例早中期ESCC和8例正常食管组织病理标本,免疫组化方法检测Notch1和VEGF-C的表达,并探讨其与临床病理特征的关系,分析Notch1和VEGF-C表达的相关性.结果 与正常食管组织比较,早中期ESCC组织Notch1表达阳性率下降[47.5%(19/40)比100.0%(8/8),P=0.006)],而VEGF-C表达升高[67.5%(27/40)比0.0%(0/8),P=0.000].高、中、低分化ESCC组织中Notch1表达阳性率分别为80.0%(8/10)、50.0%(7/14)、25.0%(4/16),Notch1表达阳性率随肿瘤分化程度降低而降低(P=0.023),但在肿瘤浸润程度和淋巴结转移中差异无统计学意义(均P＞0.05).高、中、低分化ESCC组织中VEGF-C表达阳性率分别为30.0%(3/10)、71.4%(10/14)、81.3%(13/16),VEGF-C表达阳性率随分化程度的降低而升高(P=0.024).淋巴结转移阳性组VEGF-C表达阳性率高于淋巴结转移阴性组[100.0%(16/16)比45.8%(11/24),P=0.000].与T2分期组比较,T3～T4分期组ESCC组织VEGF-C表达阳性率升高[82.1%(23/28)比33.3%(4/12),P=0.000].Notch1与VEGF-C表达呈负相关(r=-0.486,P=0.003).结论 Notch1在早中期ESCC中表现为抑癌基因,其异常低表达可能是引起VEGF-C异常高表达的因素之一.     

Plasma level and tissue expression of vascular endothelial growth factor in renal cell carcinoma: a prospective study of 50 cases

Vascular endothelial growth factor (VEGF) is the major factor involved in angiogenesis. Although it is known that one of the functions of VEGF is to regulate neovascularization in renal cell carcinomas, the relationship between the production of VEGF in tumor tissue and its concentration in blood has not yet been studied. The aims of this study were to determine, in a series of conventional renal cell carcinoma (CRCC) cases, (1) VEGF expression and VEGF pattern in tumor cells, (2) the relationship between VEGF expression/pattern and VEGF levels in plasma (pVEGF), and (3) the association with usual clinical and pathologic prognostic factors. Fifty patients operated on for CRCC by radical nephrectomy were included. Clinical and histologic parameters were studied. VEGF expression and VEGF pattern in tumor cells was immunohistochemically recorded. pVEGF levels and platelet count were analyzed in relation to clinical and histologic parameters. Intratumoral VEGF expression associated with a cytoplasmic VEGF pattern was significantly higher in patients with high pVEGF levels (P = .01). Both VEGF expression and pVEGF levels were significantly correlated with Fuhrman grade (P = .002 and P = .01, respectively) and tumor stage (P = .006 and P = .008, respectively). In addition, VEGF expression was also correlated with tumor necrosis (P = .001) and progression (P = .001). We demonstrated that in CRCC with tumor necrosis, VEGF expression, pVEGF levels, and platelet count were significantly higher than in CRCC with no tumor necrosis (P = .001, P = .03, and P = .001, respectively). Our results revealed that cytoplasmic VEGF expression and pVEGF levels are associated with usual prognostic factors and progression in CRCC, which may allow VEGF to be used as a prognostic marker for CRCC, especially in patients with VEGF-targeted therapy.     

Maspin overexpression correlates with increased expression of vascular endothelial growth factors A, C, and D in human ovarian carcinoma

The vascular endothelial growth factor (VEGF) family, including VEGFA, VEGFC, and VEGFD, plays an essential role in the angiogenesis of both pathologic and nonpathologic conditions. Maspin belongs to the serpin superfamily and has been identified as a tumor suppressor because it inhibits motility, invasion, and angiogenesis. Few studies have compared maspin with VEGF in ovarian carcinoma. Therefore, we investigated the expression and correlation of maspin, VEGFA, VEGFC, and VEGFD with the tumorigenesis of the ovary and clinicopathologic variables.

Using immunohistochemistry, we examined maspin, VEGFA, VEGFC, and VEGFD expression in 60 ovarian carcinoma tissues (35 serous papillary carcinomas, 18 endometrioid carcinomas, and 7 primary ovarian mucinous carcinomas). Staining of cells was scored as +2 if more than 50% of the cells were positive, as +1 if less than 50% of the cells were positive, and as negative if none of the cells stained positive.

Overexpression of maspin, VEGFC, and VEGFD was significantly associated with high tumor grade (P<.001, P=.004, P<.001, respectively), clinical stage (P=.002, .01, and .001, respectively), the presence of ascites (P<.001, P=.03, and P=.001, respectively), and the presence of metastatic lymph nodes (P=.002, P<.001, and P<.001, respectively). Maspin was correlated with VEGFA (P=.01), VEGFC (P<.001), and VEGFD (P<.001). The VEGFA score was positively correlated with high tumor grade (P=.04), lymphovascular space invasion (LVSI) (P<.001), International Federation of Gynecology and Obstetrics (FIGO) stage (P=.009), maspin, VEGFC (P=.003), and VEGFD (P=.003), but it was not correlated with the presence of ascites and metastatic lymph nodes.

Maspin, VEGFC, and VEGFD are expressed in ovarian tumors with a poor prognostic parameters, and seem to play a role in ovarian cancer angiogenesis, progression, and lymph node metastases. Our results indicate that in contrast to most other carcinomas, maspin expression is directly associated with the biological aggressiveness of ovarian carcinoma. These results may offer new insights regarding the role of maspin in ovarian cancer and might also affect the diagnosis and treatment strategies.     

类风湿关节炎患者抗血管内皮细胞抗体、血管内皮生长因子和白细胞介素-17的检测及意义

目的通过对类风湿关节炎（RA）患者血清抗血管内皮细胞抗体（AECA）、血浆血管内皮生长因子（VEGF）和白细胞介素-17（IL-17）的检测,旨在探讨AECA、VEGF、IL-17在RA患者发病、病情进展中的相关性及其内在联系。方法采用间接免疫荧光法（IIF）和双抗体夹心酶联免疫吸附试验（ELISA）法检测86例RA、45例骨关节炎（OA）、30例健康对照AECA的阳性率和VEGF、IL-17水平,VEGF、IL-17水平与红细胞沉降率（ESR）、超敏C反应蛋白（hs．CRP）、类风湿因子（RF）等指标进行相关性分析。结果RA患者AECA阳性率为8．1％,高于OA患者的阳性率2．2％（t=2．133,P〈0．05）和健康对照的阳性率0（t=2．562,P〈0．05）;RA活动期AECA阳性率为16．7％,高于RA缓解期的阳性率3．6％（f=2．105,P〈0．05）;RA患者血浆IL-17和VEGF水平显著高于OA组（t=2．02、t=2．106,P〈0．05）和健康对照组（t=2．413、t=2．469,P〈n05）;RA患者活动期血浆IL—17和VEGF水平明显高于RA缓解组（t=2．315、t=2．232,P〈0．05）及健康对照组（仁2．985、t=2．753,P〈0．01）;RA缓解组与健康对照组无明显差异（t=1．475、t=1．326,P〉0．05）;RA患者AECA滴度、血浆IL-17、VEGF水平与ESR、hs—CRP、RF的指标呈正相关。结论AECA、VEGF、IL-17三者与RA的发病、病情活动存在-定的关系,IL-17、VEGF水平变化及AECA的滴度可作为临床观察RA病情活动、判断疗效及预后等方面的参考指标。     

非小细胞肺癌患者血清VEGF水平和外周血CK19 mRNA的表达

目的： 研究非小细胞肺癌（NSCLC）患者血清血管内皮生长因子(VEGF)水平的变化和外周血中细胞角蛋白19（cytokeratin 19,CK19）mRNA的表达及相互关系。方法： 3组研究对象为NSCLC组患者96例，支气管、肺良性病变组40例，健康对照组25例，分别采用ELISA法进行血清VEGF的检测，RT-PCR法进行外周血CK19 mRNA表达水平的测定。结果： NSCLC组的血清VEGF水平为（346.3±95.6）ng/L,外周血CK19 mRNA的阳性率为63.5%，均显著高于其它2组（P<0.01）；且两者均随临床分期的递增而逐步升高，差异显著（P<0.05）；不同病理类型的NSCLC患者的血清VEGF水平及CK19 mRNA阳性率之间无显著差异（P>0.05）；NSCLC患者外周血CK19 mRNA阳性者，其血清VEGF水平为（407.4±121.2）ng/L，显著高于阴性患者（P<0.01）。结论： VEGF血清水平联合外周血CK19 mRNA的检测有助于对NSCLC的病情和预后进行判断，且不受肺癌病理分型的影响。     

寻常型银屑病患者皮损中瘦素、脂联素与血管内皮生长因子表达的研究

目的 探讨寻常型银屑病患者皮损中瘦素、脂联素及其血管内皮生长因子vascular endothelial growth factor(VEGF)的变化与意义.方法 ①采用免疫组织化学技术检测34例寻常型银屑病患者和21例正常人皮损中瘦素、脂联素与VEGF表达水平.结果 同正常对照组相比,寻常型银屑病患者皮损中瘦素、脂联素以及血管内皮生长因子表达明显高于正常对照组,强阳性率分别为17.65%、17.65%和14.7%,差异有统计学意义(χ2=9.18,P<0.05;χ2=13.34,P<0.05;χ2=18.9,P<0.05),相关分析表明,瘦素表达水平与VEGF表达水平呈正相关(r=0.8,P<0.05),脂联素与VEGF无相关(r=-0.02,P>0.05).结论 寻常型银屑病患者皮损中瘦素、脂联素及其VEGF水平的变化可能与银屑病的发病有关,而血管内皮生长因子的变化可能与瘦素有关.     

Increased expression of tissue vascular endothelial growth factor and foetal liver kinase-1 receptor in seasonal allergic rhinitis and relevance to asthma component

BACKGROUND: There is a difference in the extent of remodelling in allergic rhinitis (AR) and asthma. This may be attributed to the difference in local tissue response to these mediators. OBJECTIVES: The aim of this study was to compare vascular endothelial growth factor (VEGF) and its receptor foetal liver kinase (Flk)-1 expression between seasonal AR patients with or without asthma and non-allergic controls as well as that between AR patients with and without asthma. METHODS: Thirteen subjects with seasonal AR and six non-allergic controls were included in the study. Allergic sensitization was demonstrated by a skin prick test. Inferior turbinate thiny biopsies were obtained from both groups. Monoclonal mouse antibodies were used to demonstrate VEGF and Flk-1. Nasal mucosal endothelial cells' staining intensity was graded semi-quantitatively and the histochemical score (HSCORE) was calculated. In all samples, VEGF- and Flk-1-labelled vessels were counted for the assessment of vascular surface density (VSD). RESULTS: The mean HSCORE for VEGF and anti-VEGF-based VSD were significantly higher in the patient group (P=0.001 and 0.002, respectively). The mean HSCORE for Flk-1 and anti-Flk-1-based VSD in the patient group were significantly higher than those in the control group (P=0.016 and 0.028, respectively). Differences between the mean HSCORE for VEGF and anti-VEGF-based VSD in patients with pure AR and AR and asthma were insignificant (P=0.16 and 0.39, respectively). The mean HSCORE for Flk-1 and anti-Flk-1-based VSD in patients with pure AR were significantly lower than those in patients with AR and asthma (P=0.004 and 0.018, respectively). CONCLUSION: Angiogenic factor VEGF and its receptor Flk-1 is increased in AR. A similar increase in VEGF in AR with and without asthma despite a higher Flk-1 in AR patients with asthma may be a possible explanation for the presence of angiogenesis in the airway wall in patients with asthma but not in those with pure AR.     

不明原因复发性流产患者分泌中期子宫内膜血管内皮生长因子和孕激素受体的表达

目的 检测不明原因复发性流产(URSA)患者分泌中期子宫内膜的血管内皮生长因子(VEGF)和孕激素受体(PR) mRNA及蛋白的表达及探讨其意义.方法 选取2010年6月至2011年10月在广州医学院第三附属医院生殖医学中心和广东省妇幼保健院生殖医学中心及产前诊断科的22例URSA患者为研究组;20例正常妇女为对照组.采用实时荧光定量PCR和免疫组化法检测2组人群分泌中期子宫内膜VEGF和PR的mRNA及蛋白的相对表达水平.结果 VEGF和PR的mRNA和蛋白在两组表达率均为100％;VEGF蛋白表达于腔上皮和间质;PR蛋白表达于腺上皮和间质.研究组VEGF的mRNA和蛋白表达水平均低于对照组(0.16±0.10比0.34±0.22,0.014±0.004比0.018±0.005,均P＜0.05);研究组PR的mRNA和蛋白表达水平均低于对照组(2.52±0.99比4.38± 1.44,0.25±0.02比0.32±0.02,均P＜0.05).结论 URSA患者分泌中期VEGF、PR的相对低表达可能是导致URSA的分子机制之一.     

宫内生长受限新生大鼠胰腺PDX-1的表达及意义

目的研究宫内营养不良致宫内生长受限(IUGR)大鼠胰腺发育、分化的关键因子胰十二指肠同源盒1(PDX-1)的表达,探讨IUGR个体胰腺中β细胞发育受损及机能障碍的分子学机制。方法建立宫内生长受限大鼠模型。低蛋白饮食组,雌性大鼠自受孕后第1天起给予同热卡低蛋白饲料喂养直至分娩;对照组给予普通饲料喂养。自然分娩后,称取新生仔鼠体重,测量鼻尾长,摘取胰腺,免疫组织化学染色方法检测新生大鼠胰腺中PDX-1的表达。结果 (1)IU-GR新生大鼠出生体重、鼻尾长及胰腺重量均低于对照组(P<0.01)。(2)IUGR新生大鼠胰腺中PDX-1的表达明显低于对照组(P<0.01)。结论宫内蛋白营养不良大鼠致IUGR,在新生鼠时间点,胰腺重量明显低于对照组,胰腺中PDX-1表达下降尤其严重,其下降幅度为体重减轻幅度的2倍(48%:23%),为胰腺重量降低的5.5(48%:8.6%)倍之多,PDX-1降低可能是造成胰腺发育落后和/或胰岛β细胞功能障碍的分子机制之一。     

电针干预脊髓损伤大鼠受损节段缺氧诱导因子1α、血管内皮生长因子的表达

背景:作者发现,中医“痿病”从气血论治理论与脊髓损伤神经修复的关键环节在于改善组织血氧微环境有着惊人的相似,提出假设:电针刺激可通过干预缺氧诱导因子1α、血管内皮生长因子信号转导,改善脊髓血氧微环境从而促进神经再生。目的:探讨电针干预对脊髓损伤大鼠受损节段缺氧诱导因子1α、血管内皮生长因子表达的影响。方法:120只SD雌性大鼠以微型血管夹夹闭脊髓,保持夹闭状态20 s制作脊髓夹伤模型,随机分为3组:即阿是穴电针组、足阳明胃经电针组和空白对照组,每组40只。电针组造模后第3天开始接受每日1次的电针治疗,阿是穴电针组选择2个阿是穴、足阳明胃经电针组选择双侧伏兔、足三里穴,每周5次。于干预后1,2,3,4,5周对大鼠进行BBB评分之后分别取出损伤的脊髓组织标本,行病理组织观察,并采用免疫组织化学染色、实时荧光定量PCR技术及Western blot检测损伤脊髓缺氧诱导因子1α、血管内皮生长因子的基因和蛋白表达。实验方案经广西中医药大学第一附属医院动物实验伦理委员会批准(批准号201712001)。结果与结论:①阿是穴电针组及足阳明胃经电针组大鼠的下肢功能评分、缺氧诱导因子1α及血管内皮生长因子基因及蛋白表达明显高于未经电针干预的对照组;②随着干预时间的推移阿是穴电针组及足阳明胃经电针组的神经元数量均明显高于空白对照组;③结果说明,电针干预可以有效改善脊髓损伤大鼠的下肢功能评分、增加神经元的数量、上调缺氧诱导因子1α及血管内皮生长因子的mRNA及蛋白表达,从而有效促进脊髓神经功能的修复。