食管支架术后再狭窄组织中表皮生长因子及其受体的表达分析

目的 研究动物食管支架置入术后不同时间食管组织中表皮生长因子(EGF)、表皮生长因子受体(EGFR)的表达状况，以及与再狭窄形成的关系。方法 将16只食管支架术后再狭窄模型犬分为4组，分别于术后1、2、4、8周取材，另设立6只对照犬，所有样本采用免疫组织化学(SABC)及RT—PCR方法检测支架术后组织中EGF、EGFR的蛋白及mRNA表达。结果 支架术后1、2周食管组织中，EGF、EGFR的mRNA和蛋白均有明显表达，表达量较正常组织显著增强，几乎所有组织均不同程度的表达EGF、EGFR。4周时表达显著减弱，术后8周其表达基本消失。EGF的阳性细胞主要是巨噬细胞及部分血管内皮细胞与平滑肌细胞；EGFR的着色细胞主要是巨噬细胞、淋巴细胞及成纤维细胞。结论 食管支架术后，局部组织中淋巴细胞、巨噬细胞以及成纤维细胞增殖活性的变化与再狭窄的病理过程存在密切的关系，是重要的调节细胞。     

胃炎消对胃癌癌前病变组织中表皮生长因子受体表达的影响

目的：观察胃癌癌前病变(PLGC)组织中表皮生长因子受体(EGFR)蛋白及mRNA水平的表达及中药胃炎消的调控作用。方法：胃镜病理证实为PLGC病例共40例，分为胃炎消治疗(胃炎消)组25例，维酶素治疗(对照)组15例，治疗前、后胃粘膜固定部位活检标本，采用LSAB免疫组织化学及原位分子杂交标记的方法作EGFR蛋白翻译和mRNA转录水平的检测。结果：胃炎消组症状总有效率为84．00％，病理疗效以中度异型增生为好，作用优于对照组；在PLGC组织中，EGFR蛋白翻译和mRNA转录水平均有过表达，且其表达随病变的进展而递增；胃炎消能使EGF-R蛋白及mRNA的表达下调。结论：胃炎消对PLGC有良好的治疗作用；该治疗作用可能与本方下调PLGC组织中与细胞增殖相关EGFR蛋白及mRNA的表达有关。     

萎缩性胃炎患者幽门螺杆菌根除后表皮生长因子及其受体的变化

目的　研究幽门螺杆菌 (Helicobacterpylori,H .pylori)感染对胃黏膜表皮生长因子受体 (epidermalgrowthfactorreceptor ,EGFR)、血清表皮生长因子 (epidermalgrowthfactor,EGF)水平的影响。方法　对 60例H pylori检测阳性的慢性萎缩性胃炎患者进行根除治疗 ,在治疗前及疗程结束 3个月后分别进行胃镜检查 ,并采用免疫组化及放射免疫法测定H pylori根除前后胃黏膜EGFR和血清EGF含量。 3 0例H pylori检测阴性且胃镜检查无明显异常者作为正常对照组。结果　 60例H pylori检测阳性的CAG患者的胃黏膜EGFR阳性率及血清EGF水平均高于正常对照 ,其差异有显著性 (P <0 0 5 ,P <0 0 1)。有 3 1例在根除治疗 3个月后进行了复查 ,其中 2 4例H pylori得到成功根除。 2 4例H pylori得到根除的CAG患者 ,根除后血清EGF水平明显下降 (P <0 0 1) ,而EGFR阳性率无改变 (P >0 0 5 )。结论　H pylori感染引起胃黏膜EGFR阳性率及血清EGF水平增加 ,根除H pylori后血清EGF可恢复至正常水平 ,而胃黏膜EGFR阳性率在短期内没有明显改变     

萎缩性胃炎表皮生长因子及其受体表达的临床意义探讨

目的通过对萎缩性胃炎表皮生长因子（EGF）和表皮生长因子受体（EGFR测定，探讨EGFR对萎缩性胃炎转归影响作用。方法应用EGFR单抗免疫组化ABC技术和放射免疫法对50例萎缩性胃炎和25例胃癌及19例“正常”胃粘膜组织EGFR和血清EGF水平进行检测。结果萎缩性胃炎EGFR表达的阳性率为60％，血清EGF水平平均3．54土1．47ug／L，较“正常”组（11％和1．77土0．60μg／L）明显增高，与胃癌（73％，3．72士1．84μg／L）十分接近。伴有Ⅱb型肠化者EGF水平更高。并发现EGF的高水平与EGFR高表达具有一致性。结论萎缩性胃炎体内有高水平EGF和EGFR表达。对目前使用促EGF药物治疗萎缩性胃炎提出质疑。     

表皮生长因子及其受体在原发性肝癌中的表达及意义

应用组织芯片和免疫组化S-P法检测48例肝癌（肝癌组）、30例乙肝肝硬化（肝硬化组）患者肝组织表皮生长因子（EGF）及其受体（EGFR）表达,以正常肝组织为对照组,结果肝癌组EGF和EGFR阳性率显著高于肝硬化组和对照组,P均〈0．01。认为EGF和EGFR在原发性肝癌中呈过表达,是其发生、发展和转移的重要促进因素。     

胃癌患者检测表皮生长因子及受体的意义

目的:探讨表皮生长因子(EGF)及其受体(EGFR)的表达与胃癌发生及胃癌生物学行为的关系。方法:采用免疫组化S-P法对50例胃癌进行研究。结果:EGF和EGFR在早期胃癌中的阳性率均为20％(2/10),在进展期胃癌的阳性率分别为62.5％(25/40)和60％(24/40),进展期胃癌EGF和EGFR的阳性率均显著高于早期胃癌(P<0.05)。有转移组的EGF及EGFR阳性率高于无转移组(P<0.05)。EGF及EGFR的表达与胃癌的组织学类型有关。结论:EGF及EGFR阳性的肿瘤可能具有更强的浸润与转移能力,检测EGF和EGFR有助于判断胃癌预后。     

给药条件下表皮生长因子对萎缩性胃炎逆转作用研究

以往研究表明 ,表皮生长因子 (EGF)对萎缩性胃炎(CAG)具有增殖、逆转萎缩的作用。但另有研究表明 ,表皮生长因子受体 (EGFR)及癌基因C erbB2扩增表达增加 ,与高水平的EGF结合后使细胞进入致癌基因表达的最终共同通道 ,打破正常的反馈机制 ,最终形成肿瘤。因此 ,各种采用内、外源性EGF的治疗 ,存在着是否同时致癌的危险性 ,有必要进一步证实EGF的抗萎缩疗效 ,并探讨在内、外源性EGF对CAG胃黏膜的作用下 ,从EGFR及其相关的C erbB2基因蛋白表达水平变化来明确其治疗CAG的安全性 ,以权衡利弊。一、材料与方法采用健康、性成熟、…     

健中愈疡片对乙酸诱导胃溃疡大鼠表皮生长因子及其受体表达的影响

[目的]观察健中愈疡片对乙酸诱导胃溃疡大鼠血清表皮生长因子（EGF）水平和胃溃疡边缘表皮生长因子受体（EGFR）表达的影响。[方法]制备乙酸诱导大鼠胃溃疡模型，分别予健中愈疡片、雷尼替丁和0．85％氯化钠液治疗14d，用放射免疫分析法测定大鼠血清EGF水平，免疫组织化学染色法检测胃溃疡边缘EGFR表达。[结果]造模3d时，胃溃疡模型组大鼠的血清EGF水平明显高于正常对照组，胃溃疡边缘EGFR表达比正常对照组明显增加。治疗14d后，与雷尼替丁组和0．85％氯化钠液组比较，健中愈疡片组的血清EGF水平显著减少（P〈0．01），而胃溃疡边缘EGFR表达显著增加（P〈0．01）。[结论]血清EGF水平可以作为反映胃肠黏膜完整性的一个监控指标，健中愈疡片能够减少血清EGF水平和增加胃溃疡边缘EGFR表达，这可能是其加速乙酸诱导胃溃疡愈合的主要作用机制。     

胃癌表皮生长因子与表皮生长因子受体与增殖细胞核抗原表达的意义

目的观察胃癌细胞表皮生长因子（Epidermalgrowthfactor，EGF），表皮生长因子受体（Epidermalgrowthfactorreceptor，EGFR）与增殖细胞核抗原（Proliferatingcellnuclearantigen，PCNA）表达的关系．方法23例胃癌切除标本用免疫组织化学染色法检测EGF、EGFR与PCNA．组织学分型，乳头状腺癌3例，管状腺癌6例，低分化腺癌14例．对EGFR阳性胃癌以镜面切片染色法，计算出EGFR阳性癌细胞以及EGFR阴性癌细胞PCNA数．资料以studentt测验进行统计学处理．结果EGF阳性胃癌14例（60．9％），EGFR阳性胃癌5例（21．7％），EGF与EGFR同为阳性胃癌3例（13％）．EGFR阳性胃癌细胞PCNA阳性率为49．95％±20．30％，EGFR阴性胃癌18例细胞PCNA阳性率为28．48％±18．18％，EGF与EGFR同为阴性7例，PCNA阳性率为18．82％±14．24％，差异性有显著意义（P＜0．05）．5例EGFR阳性胃癌镜面切片免疫组织化学染色结果，EGFR阳性癌细胞与EGFR阴性癌细胞PCNA阳性率分别为49．95％±20．30％与39．68％±17．88％．5例EGFR阳性胃癌和3例EGFR与EGF同为阳性胃癌中，全部为低分化型腺癌，且均有静脉浸润．结论EGFR阳性胃癌细胞PCNA高表达表明，EGFR与EGF配体结合可促进癌细胞异常分裂增殖．EGFR与EGF表达与肿瘤高浸润性低分化性相关，     

雷公藤多苷对胶原诱导性关节炎大鼠表皮生长因子受体家族表达的影响

目的 观察表皮生长因子受体(EGFR)家族成员EGFR、ErbB-2在胶原诱导性关节炎(CIA)大鼠滑膜及软骨中的表达及雷公藤多苷(TWP)对其影响,探讨EGFR、ErbB-2在CIA大鼠发病中的,作用及TWP治疗RA的药理作用机制.方法 建立CIA大鼠模型,分别采用免疫组织化学染色及实时定量聚合酶链反应( PCR)检测EGFR、ErbB-2在滑膜和软骨中的表达.统计学处理采用单因素方差分析.结果 EGFR、ErbB-2的蛋白表达及mRNA水平在CIA模型组滑膜(EGFR 0.268±0.059,ErbB-2 0.25±0.04.EGFR mRNA:14.2±0.55,ErbB-2 mRNA 23.46±3.64)和软骨(EGFR 0.193±0.018,ErbB-2 0.217±0.033,EGFR mRNA:4.16±0.50,ErbB-2 mRNA 9.23±0.66)中明显高于正常组(P＜0.01),在治疗组中表达低于模型组(P＜0.01).结论 初步证明EGFR、ErbB-2参与了CIA的病理过程.TWP治疗RA的机制可能与其降低EGFR、ErbB-2的表达有关.     

甲状腺增殖性疾患组织表皮生长因子及其受体的表达

目的　探讨表皮生长因子 (EGF)及其受体 (EGFR)在甲状腺增殖性疾患中的表达及其作用。方法　应用免疫组化ABC染色方法观察 70例甲状腺组织切片EGF及EGFR的表达。结果(1)EGF在正常、肿瘤及非肿瘤组织中几乎均无表达。 (2 )乳头状、滤泡型甲状腺癌及其混合癌EGFR阳性表达高于非癌疾患及正常组织 (P <0 .0 5 ) ,阳性表达程度以强阳性为主。 (3)在正常组织、良性腺瘤、结节性甲状腺肿及桥本病 ,弱或中度的EGFR阳性表达率各组间差异无显著性。正常组织阳性表达率虽高达 83.3 % ,但 2 / 3表达为弱阳性。 (4 )乳头状甲状腺癌以细胞浆表达EGFR占优势 ,滤泡型及混合型甲状腺癌主要为混合着色 ,但与非癌混合着色不同的是多数以胞浆表达占优势 ;良性疾患以混合染色为主 ,但结节性甲状腺肿以膜着色居多。正常组织为浆、膜混合着色。结论　 (1)对EGFR强阳性表达尤其细胞浆为主者应高度疑及甲状腺癌。 (2 )各甲状腺良性疾患均有不同程度EGFR表达 ,虽无统计学意义上的差别 ,却可说明EGFR对于良性肿瘤及非肿瘤增殖性疾患的生成均有不应忽视的作用。     

Expression of epidermal growth factor and fibroblast growth factor in human hepatocellular carcinoma: an immunohistochemical study

ABSTRACT— Expression of epidermal growth factor (EGF) and fibroblast growth factor (FGF) was examined in 56 patients with hepatocellular carcinoma (HCC) using an immunohistochemical method. EGF and FGF were expressed on carcinoma cells in 14 (25%) and 23 cases (41%), respectively. In the 23 FGF-positive cases, 11 cases were positive for both acidic and basic FGF, while 18 were positive for acidic FGF, and 16 were positive for basic FGF. In non-cancerous hepatic tissues, FGF was weakly positive in macrophages, hepatocytes and vascular endothelial cells in some cases, while EGF was totally negative. There were no significant correlations between the expression of EGF or FGF on carcinoma cells and the various clinicopathologic factors examined. These data suggest that EGF and FGF are produced by human HCC cells in vivo. The roles of the expression of these growth factors in the development and progression of HCC remain only speculative.     

促愈颗粒对胃溃疡实验大鼠胃黏膜表皮生长因子及其受体表达的影响

[目的]研究促愈颗粒对乙酸烧灼型胃溃疡(GU)大鼠胃黏膜表皮生长因子(EGF)及其受体(EGFR)表达的影响。[方法]将大鼠随机分为4组:正常对照组,模型组,促愈颗粒组和雷尼替丁组。乙酸制备慢性GU大鼠模型后,于给药14 d和28 d后分2次处死大鼠,观察胃黏膜组织形态,免疫组织化学技术检测大鼠胃黏膜EGF及EGFR水平。[结果]与模型组比较,促愈颗粒组和雷尼替丁组囊状扩张腺体数量均显著减少(P<0.01,<0.05),EGF及EGFR水平均显著增高(P<0.01,<0.05),且促愈颗粒组作用均优于雷尼替丁组(均P<0.05)。[结论]促愈颗粒可能通过增加胃黏膜EGF和EGFR的水平,进而提高GU再生黏膜结构和功能成熟度,从而促进溃疡愈合,提高溃疡愈合质量,并防止溃疡复发。     

Serum and correspondent tissue measurements of epidermal growth factor (EGF) and epidermal growth factor receptor (EGF-R)

Summary Background. EGF and EGF-R are frequently overexpressed in the tissue of patients suffering from ductal pancreatic cancer and to lesser degree in patients with chronic pancreatitis. The aim of this study was to determine the value of serum measurements in these patients to detect malignant pancreatic disease. In cases of pancreatic cancer, the tissue expression of EGF and EGF-R was evaluated by immunohistochemistry. Method. Thirty-five patients with chronic pancreatitis and 31 patients with pancreatic cancer were evaluated; 71 patients admitted for routine surgery (hernia repair, cholecystectomy, goiter surgery) served as controls. Results. EGF and EGF-R values were not significantly different in pancreatic cancer as compared to controls and did not correlate with other tumor markers (CA 19-9, carcinoembryonic antigen [CEA], tumor polypeptide antigen [TPA]) or with the stage of the disease. Fourteen patients (67%) with pancreatic cancer displayed tissue overexpression for EGF and 11 patients for EGF-R (52%). These patients, however, also failed to exhibit any significant pathological changes in serum concentration. In chronic pancreatitis, EGF and EGF-R were significantly decreased as compared to pancreatic cancer and controls. This was an unexpected finding. There was a positive correlation to clinical exocrine insufficiency. Conclusion. The results of this study show that routine measurements of epidermal growth factor (EGF) and epidermal growth factor receptor (EGF-R) cannot improve screening for pancreatic cancer despite the frequently present tissue overexpression. Both values fail to reveal this malignancy in a serum test. Patients with chronic pancreatitis exhibit no or very low concentrations of EGF. In cases where preoperative diagnosis is difficult the noninvasive EGF and EGF-R serum measurements may be helpful in discriminating between pancreatic cancer and chronic pancreatitis.     

表皮生长因子及谷氨酰胺对大鼠乙酸性结肠炎保护作用的病理学研究

目的:本文肌注表皮生长因子EGF和(或)饲喂谷氨酰胺GLN防治大鼠乙酸性结肠炎。方法:Sprague-Dawley系大鼠体重200—220g,40只分为乙酸组、EGF组、GLN组、EGF GLN组各10只,从大体.光镜、电镜(透射、扫描)观察结肠粘膜的损伤情况。结果:上述4组结肠粘膜损害的指数分别为3.11±0.93,1.78±0.97,1.30±0.48及1.10±0.32(P<0.01)。镜下观察也有明显疗效,以EGF GLN组为最佳。结论:EGF及GLN对结肠粘膜细胞形态结构具有保护作用,且优于两者单独作用,这为表皮生长因子、谷氨酰胺用于防治人类溃疡性结肠炎提供了理论依据。     

Increased epidermal growth factor in experimental diabetes related kidney growth in rats

Summary Renal enlargement is a characteristic feature of human and experimental diabetes mellitus that may be predictive of subsequent nephropathy. In the streptozotocin diabetic rat kidney growth rapidly follows the induction of experimental diabetes but the mechanisms responsible for this growth are poorly understood. Epidermal growth factor (EGF) is a potent mitogen for renal tubular cells. Thirty one male Sprague-Dawley rats aged 13 weeks were randomised to receive either streptozotocin (diabetic, n = 20) or buffer (control, n = 11). Animals were studied on days 1, 3, 5 and 7 following streptozotocin. Diabetes was associated with a 3-fold increase in urinary EGF excretion (223 ± 15 vs 59 ± 5 ng/day, mean ± SEM, diabetic vs control, p < 0.0001) and 3–6 fold increase in renal EGF mRNA relative to controls (p < 0.001). A transient rise in kidney EGF protein was noted on day 1. There was no difference between diabetic and control animals with regard to intrarenal sites of EGF expression or in plasma EGF. These data suggest that the increased urinary EGF excretion in diabetic animals is the result of enhanced local production and that EGF is not stored for a prolonged period within renal tubular cells but is released following its synthesis. In the context of the known intrarenal actions of EGF this growth factor may play a role in the pathogenesis of diabetes related kidney growth. [Diabetologia (1997) 40: 778–785] Received: 16 December 1996 and in revised form: 4 March 1997     

Expression of transforming growth factor alpha and epidermal growth factor receptor in human hepatocellular carcinoma

Abstract: Transforming growth factor alpha (TGF-alpha) is thought to be involved in liver regeneration, cellular proliferation, and hepatocarcinog-enesis. We have looked at the relationship between TGF-alpha and it's receptor, and have attempted to relate the expression of TGF-alpha and it's receptor to the differentiation of hepatocellular carcinoma (HCC) on serial sections of HCC. We examined immunohistochemically the expression of the TGF-alpha and of epidermal growth factor receptor (EGFR) proteins in the same area of 53 nodules (<5 cm in diameter) of HCC obtained from patients. Immnnoreactive proteins were visualized by using a biotin-streptoavidin system (LSAB Kit, Dako). TGF-alpha was strongly expressed in 29 of 53 (54.7%) nodules. Specimens strongly positive for TGF-alpha were found mainly in well-differentiated HCC, while specimens positive for EGFR were found mainly in poorly differentiated HCC (p<0.05). In the tissues that stained weakly positive for TGF-alpha, the expression of EGFR differed significantly, according to the degree of HCC histologic differentiation (p<0.05). These results led us to speculate that the expression of TGF-alpha and EGFR might be related to the pattern of histologic differentiation of HCC.     

EGF受体和转化生长因子α mRNA在人大肠癌组织的表达意义

目的研究表皮生长因子受体（ＥＧＦＲ）及转化生长因子α（ＴＧＦα）在人大肠癌三组不同组织中的表达，探讨其在大肠癌发生发展中的作用．方法分别取１４例大肠癌患者癌瘤组织、癌旁２ｃｍ及１０ｃｍ之全层肠管，采用Ｎｏｒｔｈｅｒｎｂｌｏｔ方法分别检测ＥＧＦＲ和ＴＧＦαｍＲＮＡ表达．结果大肠癌三组１４例不同组织中均有ＥＧＦＲ和ＴＧＦαｍＲＮＡ不同程度表达，以癌旁组织中表达为最强，同一病例比较，癌远侧组织中表达呈减弱趋势．癌远侧组织中，３例Ａ，Ｂ两期杂交信号明显弱于其他例Ｃ，Ｄ期信号．结论ＥＧＦＲ，ＴＧＦα在大肠癌发生发展中起重要作用，其ｍＲＮＡ表达与Ｄｕｋｅｓ分期相关，可望作为大肠癌恶性程度的指标．其在癌远侧组织中表达减弱的趋势提示是否可作为肿瘤手术切缘的评估指标，尚有待进一步的研究．