部分创面外用抗菌药物与成纤维细胞生长因子2、表皮生长因子、重组人生长激素对成纤维细胞生物学特性影响的实验研究

目的观察部分创面外用抗菌药物与成纤维细胞生长因子(FGF)2、表皮生长因子 (EGF)、重组人生长激素(rhGH)对成纤维细胞生物学特性的影响。方法体外培养成纤维细胞, 按所加药物不同分为对照组(常规培养)、丁胺卡那霉素(0．021、0．210、2．100 mg/L)组、庆大霉素(5、 50、500 mg/L)组、氯霉素(0．01、0．10、1．00 mg/L)组、磺胺米隆(5、10 g/L)组、FGF2(2 400 U/ml)组、 EGF(2 000 U/ml)组及rhGH(0．016、0．160、1．600 g/L)组。用噻唑蓝(MTT)法测定各组成纤维细胞增殖活性[吸光度(A)值],用流式细胞仪检测细胞周期,并于显微镜下观察细胞形态的变化。结果 (1)MTT法检测:与对照组A值0．455 3±0．021 7比较,各种剂量丁胺卡那霉素组、庆大霉素组、氯霉素组、磺胺米隆组成纤维细胞A值均明显降低(P<0．05或0．01),其中磺胺米隆(5、10 g/L)组降低最明显,分别为0．101 3±0．001 1、0．095 0±0．004 1(P<0．01)。FGF2组及0．016 g/L rhGH 组细胞A值明显高于对照组(P<0．05),而EGF组及0.160、1．600 g/L rhGH组A值与对照组接近 (P>0．05)。(2)细胞周期检测:对照组细胞增殖指数(PI)为(9．63±0．45)％,与之比较,0．210 mg/L丁胺卡那霉素组细胞PI值无明显变化(P>0．05),FGF2组、EGF组及0．016 g/L rhGH组PI值均明显升高,分别为(46．76±2．33)％、(42．30±1．41)％、(13．29±0．47)％(P<0．05或0．01)。 (3)形态学观察:对照组、EGF组及0．160、1．600 g/L rhGH组成纤维细胞数目较多,呈长条形或梭形, 轮廓不清,透明度高;丁胺卡那霉素组、庆大霉素组、氯霉素组、磺胺米隆组细胞数目较少,形态不规则,轮廓清晰,透明度低,细胞内多有颗粒样物质及空泡;FGF2组、0．016 g/L rhGH组细胞分布均匀、密集,呈长条形或梭形,核分裂相多见,轮廓不清,透明度高。结论不同创面外用药物对成纤维细胞生物学特性的影响各异,在创面修复过程中应选择合适的创面外用药物,以促进愈合并抑制瘢痕增生。     

复方花刺参粘多糖对髂动脉内皮剥脱家兔内膜增生的影响及机制

为了观察复方花刺参粘多糖对动脉损伤家兔内膜增生的影响及其作用机制 ,将雄性新西兰大白兔 37只随机分为正常组、模型组、花刺参组和辛伐他汀组 ,髂动脉损伤术后 6周全部家兔处死 ,取受损动脉 ,HE染色观察动脉形态学改变并图像分析测量动脉内膜、中膜厚度 ,原位杂交检测血小板源生长因子、碱性成纤维细胞生长因子和转化生长因子 β1的表达 ,免疫组织化学染色观察凋亡基因bcl 2和bax表达的改变。结果发现 ,与模型组相比 ,花刺参组和辛伐他汀组动脉内膜厚度及内膜中膜厚度比均明显减小 (P <0 .0 1) ,血小板源生长因子及转化生长因子β1的表达明显降低 (P <0 .0 5 ) ,bax表达明显升高 (P <0 .0 5 ) ,但bcl 2表达无明显差异 ;花刺参组与辛伐他汀组之间各指标均无显著差异。结果提示 ,复方花刺参粘多糖可有效减轻家兔髂动脉损伤血管内膜厚度和管腔狭窄 ,其作用机理与抑制血管平滑肌细胞增殖和促进凋亡有关。     

Bone and joint alterations in acromegaly

Growth hormone (GH) is fundamental for the maintenance of bone mass and metabolism both during childhood and in adulthood. This effect is due to a complex interaction between circulating GH and IGF-I produced peripherally. In vitro data and experimental animal models have clarified many of the regulatory mechanisms underlying the characteristic skeletal changes occurring in acromegaly. This review focuses on the effects of GH excess on bone metabolism and mass in acromegalic patients and, in particular, on the influence of factors such as hypogonadism, gender, age and therapy on bone metabolism and arthropathy.     

Changes with growth hormone treatment in growth hormone deficient children

A total of 54 previously untreated patients (15 girls, 39 boys) with poor growth due to idiopathic growth hormone deficiency (IGHD) were treated with human growth hormone (hGH), continuously up to 4 years. All of the patients had a peak hGH level which was below 10 ng/mL after at least two pharmacological tests and/or blunted physiologic hGH secretion, and their height was below ?2.5 s.d. for age and gender. After the 1st year of therapy, height velocity (HV) increased significantly when compared with baseline (from 3.18 ±0.76 cm/year to 9.17±1.03 cm/year; P <0.001), declined during the 2nd year and then remained significantly higher than pretreatment HV. When considering improvement in height expressed by height standard deviation score (SDS), during the therapy all of the patients showed a significant gain ± 1.72±1.09 (from ?4.11±0.61 to ?2.21±0.48). The height values were significantly higher than pretreatment, but remained below ?2 s.d. after 4 years of hGH therapy in our patients. Increased height velocity has been sustained, but height improvement after therapy was inversely correlated to height SDS for chronological age of patients at the start of therapy. In conclusion post-treatment height has been shown to be related to height deficit at the beginning of therapy. Therapy was well tolerated with no local or systemic adverse effects or acceleration of bone age.     

乳腺癌患者血清VEGF表达与临床预后的关系

目的探讨乳腺癌患者血清中血管内皮生长因子(VEGF)的表达以及与临床预后的关系。方法采集112例乳腺癌患者术前血清,用ELISA酶联免疫吸附法测定VEGF含量,并设48例乳腺良性疾病患者为对照组;分析乳腺癌血清VEGF表达与临床病理指标及预后的相关性。结果乳腺癌患者血清VEGF表达明显高于良性病变组;乳腺癌血清VEGF的表达与淋巴结转移情况、组织中ER和/或PR表达及CerbB-2的表达情况明显相关(P0.05),与患者年龄、肿瘤直径大小无相关性;术后随访显示,出现转移者术前血清VEGF含量明显高于无复发转移者,其差异有统计学意义(P0.05)。结论乳腺癌患者血清中VEGF的表达与其临床预后有关,可作为乳腺癌患者预后判断的重要参考指标之一。     

肝细胞癌组织中中期因子表达及其与乙型肝炎病毒感染的关系

目的　探讨肝细胞癌 (HCC)组织中中期因子 (midkine ,MK)的表达及其与乙肝病毒(HBV)感染的关系。方法　采用原位杂交及免疫组织化学方法检测 6 2例HCC、癌旁肝组织及 10例正常肝组织中MKmRNA、MK蛋白表达及HBVDNA水平。结果　 6 2例HCC组织中MKmRNA、MK蛋白表达阳性率分别为 74 2 %、75 8% ,明显高于无表达的癌旁肝组织及正常肝组织 (均P <0 0 1)。肝癌组织HBVDNA核型阳性率 (6 2 9% ,39/ 6 2 )明显高于癌旁肝组织 (6 5 % ,4 / 6 2 ) (P <0 0 1)。肝癌组织MKmRNA、MK蛋白表达与HBVDNA核型存在密切相关。结论　MKmRNA及其蛋白在HCC组织中呈过度表达 ,并可能与HBVDNA核型存在有密切联系     

生长激素在体外受精-胚胎移植卵巢反应不良患者中的应用

目的探讨生长激素（GH）在卵巢反应不良患者体外受精．胚胎移植（IVF—ET）中的作用及其机制。方法2008年9月至2009年4月拟再次行IVF-ET治疗的卵巢反应不良患者（既往周期Gn启动量≥225IUqd,获卵数≤5个）共53例,其中GH组26例,对照组27例。GH组从Gn启动前一天或当日开始合用GH至人绒毛膜促性腺激素（HCG）注射H。取卵日收集卵泡液测定GH、胰岛素样生长因子-1（IGF-1）、雌二醇（E2）水平,RT-PCR半定量检测颗粒细胞类固醇合成快速调节蛋白（StARmRNA）表达。结果GH组患者自身对照结果显示：HCG日E2水平、获卵数、MⅡ卵子数、受精率、移植胚胎数和可用胚胎数均显著增加,促性腺激素释放激素激动剂（GnRH-a）用量减少（P〈0．05）。GH组与对照组相比移植胚胎数、可用胚胎数和卵泡液IGF-1水平显著增高（P〈0．05）;临床妊娠率和卵泡液GH、E2、颗粒细胞StARmRNA水平均提高（P〉0．05）。结论合用GH可改善卵巢反应不良患者IVF—ET结局,其机制与提高卵泡液IGF-1水平,改善卵子、胚胎质量有关。     

API0134对血管平滑肌细胞增殖和血小板源生长因子B链、碱性纤维母细胞生长因子及相关癌基因表达的影响

为探讨API0134防治冠状动脉粥样硬化和腔内成形术后再狭窄的作用机制，采用内皮素诱导建立培养的血管平滑肌细胞增殖模型，用氚标胸腺嘧啶脱氧核苷掺入法、流式细胞术、免疫细胞化学检测及Northernblot方法，观察了API0134对血管平滑肌细胞增殖的作用及对血小板源生长因子B链、碱性纤维母细胞生长因子及其相关癌基因C－sis和C－mpc表达的影响。结果发现，API0134能逆转内皮素所致的氚标胸腺嘧啶脱氧核苷掺入量增多（对照组为499±92，内皮素组为617±98，API0134组为506±102），阻止血管平滑肌细胞由静止期（G0／G1期；对照组为72％，内皮素组为50％，API0134组为60％）进入DNA合成期（S期；三组分别为26％、36％和30％）和有丝分裂期（G2／M期，三组分别为2％、14％和4％），并能逆转内皮素引起的血小板源生长因子B链、碱性纤维母细胞生长因子抗原、c－sis和c－mpc的mRNA表达增强。提示API0134有抑制血管平滑肌细胞增殖的作用，这种作用与生长因子及癌基因调控的分子生物学机制有关。     

Lung growth and development

Human lung growth starts as a primitive lung bud in early embryonic life and undergoes several morphological stages which continue into postnatal life. Each stage of lung growth is a result of complex and tightly regulated events governed by physical, environmental, hormonal and genetic factors. Fetal lung liquid and fetal breathing movements are by far the most important determinants of lung growth. Although timing of the stages of lung growth in animals do not mimic that of human, numerous animal studies, mainly on sheep and rat, have given us a better understanding of the regulators of lung growth. Insight into the genetic basis of lung growth has helped us understand and improve management of complex life threatening congenital abnormalities such as congenital diaphragmatic hernia and pulmonary hypoplasia. Although advances in perinatal medicine have improved survival of preterm infants, premature birth is perhaps still the most important factor for adverse lung growth.     

肠三叶因子对新生鼠缺氧肠损伤模型白细胞介素8、丙二醛的影响及意义

目的　研究肠三叶因子 (intestinaltrefoilfactor,ITF)对坏死性小肠结肠炎 (necrotizingenterocolitis,NEC)新生大鼠的肠粘膜中白细胞介素 8(interleukin 8,IL 8)及丙二醛 (malondialdehyde,MDA)含量的影响 ,探讨ITF对NEC是否有保护作用。　方法　建立NEC模型 ,对新生 1日龄Wistar大鼠予 10 0 %二氧化碳 ,5min后再予 10 0 %氧气 ,5min后放回母鼠身边喂养 ,第 4天处死大鼠取肠道组织待检。新生鼠 32只随机分为四组 ,A组为NEC模型后腹腔注射ITF 0 .5mg ;B组为NEC模型后皮下注射ITF 0 .2mg ;C组为NEC模型组 ;D组为正常对照组。取近回盲段 1～ 2cm肠道组织固定包埋、切片、HE染色光镜下作病理学检查 ,其他肠道组织制备组织匀浆取上清液用放射性免疫法检测IL 8,用生化法检测MDA的含量。　结果　A、B组IL 8的含量 [pg (mg·pro) ]各为 2 9.72 2± 7.134、30 .5 12± 8.2 30 ,均较C组 39.379± 4 .4 2 0低 (P <0 .0 5 ) ,而与D组 2 3.92 2± 6 .16 8比较 ,差异无显著性 (P >0 .0 5 ) ;A、B组MDA的含量 [nmol (mg·pro) ]各为 2 .2 6 7± 0 .2 6 7、2 .15 4± 0 .30 1,较C组 3.378± 0 .835低 (P <0 .0 1) ,与D组 2 .2 2 5± 0 .4 4 3比较 ,差异无显著性 (P >0 .0 5 )。C组HE染色切片见肠壁的损伤轻重不一 ,有的