Role of platelet-derived growth factor-AB in tumour growth and angiogenesis in relation with other angiogenic cytokines in multiple myeloma

Angiogenesis is a complex process essential for the growth, invasion, and metastasis of various malignant tumours, including multiple myeloma (MM). Various angiogenic cytokines have been implicated in the angiogenic process. Among them, platelet-derived growth factor-AB (PDGF-AB) has been reported to be a potent stimulator of angiogenesis in many solid tumours and haematological malignancies, including MM. The aim of the study was to investigate the relationship between PDGF-AB, microvascular density (MVD), and various angiogenic cytokines, such as basic fibroblast growth factor (b-FGF), angiogenin (ANG), and interleukin-6 (IL-6), in MM patients. Forty-seven MM patients before treatment, 22 of whom were in plateau phase, were studied. We determined the serum levels of the aforementioned cytokines and MVD in bone marrow biopsies before and after treatment. Mean serum values of PDGF-AB, b-FGF, ANG, and MVD were significantly higher in patients compared with controls and with increasing disease stage. Significant positive correlations were observed between serum PDGF-AB, ANG, and IL-6 levels and MVD. Furthermore, we found significant positive correlations between PDGF-AB and b-FGF, IL-6, ANG, and β2 microglobulin. We also found that patients with high MVD had statistically significantly higher serum levels of PDGF-AB when a median MVD value of 7.7 was used as the cutoff point. Furthermore, a significant difference was found in serum levels of PDGF-AB between pre- and post-treatment patients. Finally, survival time was significantly higher in the low MVD group versus the high MVD group (76 vs 51 months). Our results showed that there is a strong positive correlation between PDGF-AB and the studied angiogenic cytokines and MVD. It seems that PDGF-AB plays a role in the complex network of cytokines inducing bone marrow neovascularization in patients with MM.     

血管生长素在胃癌血管生成中的作用

背景与目的:血管生长素(angiogenin,ANG)是一种有效的促血管生成素,资料显示结肠癌、胰腺癌等肿瘤ANG表达增强,但ANG在肿瘤性血管生成中的作用尚不清楚。本研究探讨ANG在胃癌血管生成中的作用。方法:运用免疫组化方法检测68例胃癌组织中ANG、CD34和Ki-67的表达,根据CD34的染色情况计算出胃癌组织的微血管密度(microvesseldensity,MVD),根据Ki-67的染色情况计算出肿瘤细胞Ki-67标记指数。结果:在胃癌组织中,19例ANG强阳性组织中MVD(308.4±25.6)明显高于3例ANG阴性组(196.0±31.3)(P<0.01)。ANG蛋白阳性组的Ki-67标记指数(579.6±31.4)明显高于ANG蛋白阴性组(341.3±84.0)(P<0.01)。结论:癌组织ANG蛋白表达水平与MVD呈正相关,癌组织ANG表达水平与胃癌细胞标记指数正相关。     

Angiogenesis in myelodysplastic syndromes

It is now well established that solid tumour growth depends on angiogenesis. However, less is known about the generation of new vessels in haematological malignancies and, in particular, in preleukaemic-myelodysplastic syndromes (MDS). In this study, bone marrow microvessel density (MVD) was assessed by immunohistochemistry and compared in trephine biopsies from 14 controls, five infectious disease (ID), 82 MDS, 15 acute myeloid leukaemia (AML) and 14 myeloproliferative disorder (MPD) patients. Statistical analysis (P < 0.001) demonstrated that MDS MVD was higher than in controls and ID (21 +/- 9 vs 6 +/- 2 and 10 +/- 8 respectively) but lower than AML (30 +/- 12) and MPD (40 +/- 12). Among MDS-FAB subtypes, MVD was significantly higher in RAEB-t, CMML and fibrosis subsets compared to RA, RARS and RAEB subsets (P= 0.008). To further investigate angiogenesis machinery, the expression of vascular endothelial growth factor (VEGF) was evaluated by means of immunohistochemistry in control, MDS, AML and MPD biopsies. Even though VEGF mRNA expression was reported in the past in AML cell cultures and cell lines, in our samples VEGF expression was found to be particularly strong in most of the megakaryocytes but significantly less prominent in other cell populations including blasts. Since our findings suggest a correlation between angiogenesis and progression to leukaemia, additional work is now warranted to determine what regulates the generation of new vessels in MDS and leukaemia.     

JAK-STAT信号通路与骨髓增生异常综合征Th17/Treg细胞免疫失调相关性的研究

目的:研究骨髓增生异常综合征（myelodysplastic syndrome,MDS）患者外周血中Th17与Treg细胞比例及其相关细胞因子白细胞介素-2（IL-2）、白细胞介素-6（IL-6）和转化生长因子-β1（TGF-β1）的表达及意义。方法:采用流式细胞术对健康对照组、初诊MDS患者、初诊急性髓系白血病（acute myeloid leukemia,AML）患者的外周血Th17细胞和Treg细胞进行检测,采用双抗体夹心酶联免疫吸附法(ELISA)分别检测上述三组患者外周血IL-2、IL-6与TGF-β1分泌水平,应用RT-PCR和Western blot实验检测STAT3、STAT5 mRNA与蛋白表达水平。结果:与健康对照组相比,初诊MDS患者和AML患者外周血中Treg细胞比例增高（P＜0.05）,但MDS患者组与AML患者组之间没有明显差异（P＞0.05）,三组受试者之间Th17细胞比例无明显差异（P＞0.05）;与健康对照组相比,初诊MDS患者组IL-2表达明显升高（P＜0.05）,初诊AML患者组TGF-β1和IL-2表达均显著增加（P＜0.05）;而MDS患者组与AML患者组相比,TGF-β1、IL-6、IL-2表达水平均无明显差异（P＞0.05）;与健康对照组相比,初诊AML患者组、MDS患者组外周血中STAT5 mRNA与蛋白表达均明显增加（P＜0.05）,但两者之间无差异（P＞0.05）。结论:IL-2/STAT5信号通路可能调节初始Th细胞向Treg细胞转化的关键点,也支持Treg细胞数量增高与MDS的病情进展及其向白血病转化可能有关的论断。     

IPSS-independent prognostic value of plasma CXCL10, IL-7 and IL-6 levels in myelodysplastic syndromes

Recent studies suggest a powerful prognostic value for plasma cytokine levels in primary myelofibrosis (interleukin (IL)-2R, IL-8, IL-12, IL-15 and C-X-C motif chemokine 10 (CXCL10)) and large-cell lymphoma (IL-2R, IL-8, IL-10, IL-12, CXCL9 and CXCL10). To examine the possibility of a similar phenomenon in myelodysplastic syndromes (MDS), we used multiplex enzyme-linked immunosorbent assay to measure 30 plasma cytokines in 78 patients with primary MDS. Compared with normal controls (n = 35), the levels of 19 cytokines were significantly altered. Multivariable analysis identified increased levels of CXCL10 (P<0.01), IL-7 (P = 0.02) and IL-6 (P = 0.07) as predictors of shortened survival; the survival association remained significant when the Cox model was adjusted for the International Prognostic Scoring System, age, transfusion-need or thrombocytopenia. MDS patients with normal plasma levels of CXCL10, IL-7 and IL-6 lived significantly longer (median survival 76 months) than those with elevated levels of at least one of the three cytokines (median survival 25 months) (P<0.01). Increased levels of IL-6 were associated with inferior leukemia-free survival, independent of other prognostic factors (P = 0.01). Comparison of plasma cytokines between MDS (n = 78) and primary myelofibrosis (n = 127) revealed a significantly different pattern of abnormalities. These observations reinforce the concept of distinct and prognostically relevant plasma cytokine signatures in hematological malignancies.     

溶血磷脂酸及其受体和IL-6 IL-8在乳腺癌进展中的表达变化与意义

  目的  探讨溶血磷脂酸(lysophosphatidic acid, LPA)及其受体和IL-6与IL-8在乳腺癌进展中的表达及临床意义。  方法  采用半定量RT-PCR方法检测乳腺肿瘤组织和瘤旁组织中LPA受体的表达水平。采用LPA生化测定法和酶联免疫吸附(ELISA)法分别检测乳腺肿瘤患者和健康妇女的血浆LPA、IL-6和IL-8水平。  结果  术后复发转移乳腺癌患者血浆LPA、IL-6、IL-8的表达水平均显著高于局限期乳腺癌和良性乳腺肿瘤患者及健康妇女(P均 < 0.05);LPA1在乳腺癌组织中的表达水平显著高于良性乳腺肿瘤组织和正常乳腺组织(P < 0.05);乳腺癌患者血浆LPA水平与IL-6和IL-8水平均呈正相关(P均 < 0.01)。  结论  LPA对乳腺癌患者内源性IL-6和IL-8的表达可能具有上调作用, 检测LPA、IL-6和IL-8的表达水平对乳腺癌的转移可能有一定的预测作用, 尤其是骨转移。      

Endothelial precursors and mature endothelial cells are increased in the peripheral blood of myelodysplastic syndromes

Increased angiogenesis has been demonstrated to be a significant prognostic factor in many solid tumors. In the oncohematological setting, it has been associated with myelodysplastic syndromes (MDS), chronic myeloid leukemia, acute lymphoid, and myeloid leukemias. Recently, increased circulating endothelial cells (CECs) have been associated with breast cancer and non-Hodgkin lymphoma (NHL). Based on these premises we analysed total and activated CECs, and endothelial precursors (CEPs) in 50 MDS patients and 20 healthy donors. CECs and CEPs were quantified by flow cytometry. CEC levels were compared with bone marrow (BM) microvessel density (MVD). In addition, some angiogenic factors, namely vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) and soluble VEGF-Receptor2 (VEGFR2), were tested in the sera from 25 MDS patients. Total, activated CECs and CEPs were significantly increased in MDS when compared to control group (p<0.0001); whereas in the MDS cases no association was found with French--American--British (FAB), International Prognostic Scoring System (IPSS) subtypes or survival. Patients with higher CECs also showed higher MVD. Among the cytokines analysed, sVEGFR2 was significantly higher in the lower IPSS risk classes, while the levels of bFGF directly correlated with total and activated CECs. Taken together these data strengthen the hypothesis of a possible role of angiogenesis in MDS pathogenesis.     

前列腺癌组织MVD、DNA倍体与其临床生物学行为的研究

 目的　探讨前列腺癌DNA倍体、微血管密度 (MVD)与癌分级、临床分期及预后的关系。方法　应用计算机图像分析技术、免疫组织化学 (SP)法 ,测定 30例前列腺癌 (PC)、30例前列腺增生症 (BPH)细胞核DNA倍体、MVD的变化。结果　随癌分化程度降低 ,DNA倍体增加 ,MVD升高 ,其差异有显著性 (P<0 .0 1) ;临床分期处于C、D期DNA倍体MVD高于A、B期者 (P <0 .0 1) ,其生存率亦变低 (P <0 .0 5 )。结论　DNA倍体、MVD可准确地反映PC的预后。DNA倍体与MVD间呈正相关关系。     

Angiogenesis and Survival in Patients with Myelodysplastic Syndrome

Angiogenesis has been implicated in the pathogenesis and prognosis of myelodysplastic syndrome (MDS). In this study, we investigated the relationship between microvessel density (MVD), vascular endothelial growth factor (VEGF) expression, common morphological and clinical factors, and survival in patients with MDS. We examined the MVD of paraffin-embedded bone marrow sections from 70 MDS patients and 31 controls. VEGF expression was determined in 50 patients and 20 controls. The median MVD in MDS patients was significantly higher than that in controls (p = 0.025), whereas there was no difference in VEGF expression between MDS patients and controls. In univariate analysis, increased MVD was associated with a shorter survival time (p = 0.023). However, in multivariate analysis, MVD was not an independent predictor of survival. The VEGF expression did not influence survival in univariate analysis. Survival was independently influenced by platelet count (p = 0.0073), cytogenetic risk category (p = 0.022), and transfusion dependence (p = 0.0073). Neither MVD nor VEGF expression were predictors for progression to acute myeloid leukemia in univariate analysis. Progression to acute myeloid leukemia was independently influenced only by the cytogenetic risk category (p = 0.022). This study confirmed increased MVD in MDS. It does not support an independent prognostic role of angiogenesis in MDS.     

Increased serum interleukin 6 levels in patients with myelodysplastic syndromes.

Serum concentration of interleukin 6 (IL-6) was measured in 45 patients with myelodysplastic syndromes (MDS). A commercially available enzyme-linked immunosorbent assay (ELISA) with a sensitivity of 3 pg/ml was used. While IL-6 was undetectable in healthy volunteers, 32 of the patients with MDS showed IL-6 concentrations higher than 3 pg/ml. In MDS we found serum concentrations of IL-6 between 0 and 150 pg/ml with a median of 9 pg/ml, mean and standard deviation (SD) were 15 and 26 pg/ml respectively. In refractory anemia with excess of blasts in transformation (RAEB-t) the serum IL-6 concentrations were significantly higher than in refractory anemia (RA; p = 0.0025), in refractory anemia with excess of blasts (RAEB; p = 0.0050) and in chronic myelomonocytic leukemia (CMML; 0.0449). No significant difference was detected between RA and RAEB or between CMML and the other types of MDS, while s significant negative correlation was found between the concentrations of IL-6 and hemoglobin (p = 0.0228).     

白血病患者骨髓血管新生的研究

目的研究白血病患者的骨髓血管新生程度和骨髓液血管内皮生长因子(VEGF)水平的相关性。方法采用EnVison免疫组化法,用兔抗人vWF(vonWille蛳brandfactor)多克隆抗体标记骨髓内皮细胞;采用ELISA法检测骨髓液中VEGF的含量。结果骨髓MVD在各实验组均明显高于正常对照组(P<0.05)。骨髓液VEGF水平在AML、CML组明显高于正常对照组(P<0.01),ALL组与正常对照组比较差异无显著性(P>0.05)。对各白血病组的MVD和VEGF含量进行了相关性分析,结果表明在AML或CML组中VEGF水平和MVD呈正相关性(分别为r=0.648,P<0.05;r=0.733,P<0.05)。结论白血病患者骨髓微血管数增多,提示血管新生在白血病发病中有重要作用,VEGF可能在一定程度上对血管新生有促进作用。     

原发性肝癌肿瘤血管密度及其表达的临床病理意义

目的研究肿瘤微血管密度（ＭＶＤ）和肿瘤血管生长因子（ＶＥＧＦ）的表达水平在原发性肝癌中的临床病理意义。方法对６３例手术切除的小肝癌（直径＜５ｃｍ）患者的临床病理资料进行了回顾性的研究。其中２年内转移复发组２９例,２年内无转移复发组３４例。每例取３张连续的切片分别进行ＨＥ染色、ＶＥＧＦ和生物素标记的荆豆凝集素Ｉ（Ｂｉｏ－ＵＥＡ－Ｉ）的免疫组化染色。根据Ｂｉｏ－ＵＥＡ－Ｉ染色的血管内皮细胞计数来测定ＭＶＤ。结果转移复发组和无转移复发组的ＭＶＤ分别为４９．６±２９．７、２２．７±２８．２（Ｐ＜０．０１）;转移复发组和无转移复发组的ＶＥＧＦ阳性率分别为８６．２％（２５／２９）、４７．１％（１６／３４）,两者差异有显著性（Ｐ＜０．０１）。两组在肿瘤分期、有无卫星灶、有无门脉癌栓３方面差异也具有显著性（Ｐ＜０．０５,Ｐ＜０．０５,Ｐ＜０．０１）。结论除肿瘤分期、卫星灶、门脉癌栓具有预后意义外,肝癌组织中ＭＶＤ和ＶＥＧＦ的表达也具有预后价值     

食管癌幽门螺杆菌L型感染与其血管形成的关系

目的探讨食管癌Hp-L型(即球形:Hp)感染与肿瘤血管形成的相关性及Hp-L型对食管癌生长、侵袭和转移等生物学行为的影响。方法应用革兰染色、电镜和免疫组化ABC法,检测98例食管癌和30例对照组(食管癌切缘正常组织)的Hp-L型;用免疫组化SP法检测上述组织的微血管密度(MVD)值和血管内皮生长因子(VEGF)、p53表达,分析Hp-L型与MVD、VEGF、p53表达以及临床病理因素的关系。结果 食管癌组的Hp-L型阳性率为60.2％。电镜下组织中的Hp-L型有两种类型,可位于癌细胞间或癌细胞胞浆。食管癌组的Hp-L型阳性率、MVD值以及VEGF、p53表达阳性率均高于对照组(P<0.005～0.001),食管癌组中Hp-L型阳性组的MVD值、VEGF和p53表达阳性率也高于其Hp-L型阴性组(P<0.005～0.001)。Hp-L型阳性与MVD呈正相关(r=0.46,P<0.01),与VEGF、p53表达呈正相关(r=0.31,P<0.01)。食管癌组的Hp-L型阳性数与癌细胞的血管侵袭、侵袭深度、食管旁淋巴结转移及远处淋巴结转移相关,而与肿瘤大小无关。结论 Hp-L型与食管癌的血管形成密切相关,是影响食管癌生长、侵袭和转移的重要因素之一。     

Telomere stability is frequently impaired in high-risk groups of patients with myelodysplastic syndromes.

Genomic instability induces an accumulation of genetic changes and may play a role in the pathogenesis of myelodysplastic syndromes (MDS). To clarify the possible association between genomic instability and clinical outcome in MDS patients, we compared telomere dynamics to the recently established International Prognostic Scoring System (IPSS) risk groups for MDS. We measured the terminal restriction fragments (TRFs) of 93 patients with MDS at the time of diagnosis, and telomerase activity was analyzed in 62 patients with MDS using the PCR-based telomeric repeat amplification protocol (TRAP) assay. A total of 53 of 93 MDS patients had TRFs within the age-matched normal range, and the remaining patients showed shortened TRFs (35 patients) or elongated TRFs (5 patients). MDS patients with shortened TRFs had a significantly low hemoglobin concentration (P = 0.04), a high percentage of marrow blasts (P = 0.02), and a high incidence of cytogenetic abnormalities (P < 0.05). The incidence of leukemic transformation was significantly high in patients with shortened TRF length (P < 0.05). In addition, patients with shortened TRF length were frequently seen in the IPSS high-risk group (P < 0.01). Most of the MDS patients had normal-to-low levels of telomerase activity, suggesting that changes in TRF length rather than telomerase activity may more accurately reflect the pathophysiology of MDS. MDS patients with shortened TRF length had a very poor prognosis (P < 0.01), suggesting that telomere dynamics may be linked to clinical outcome in MDS patients. Thus, an abnormal mechanism of telomere maintenance in subgroups of MDS patients may be an early indication of genomic instability. This study demonstrates that telomere stability is frequently impaired in a high-risk group of MDS patients and suggests that, in combination with the IPSS classification system, measurement of TRFs may be useful in the future to stratify MDS patients according to risk and manage the care of MDS patients.     

TIMPs与结直肠癌新生血管形成的相关性探讨

目的 探讨ＴＩＭＰ－１、ＴＩＭＰ－２表达与结直肠癌新生血管形成的关系。方法 采用免疫组化方法分析５２例结直肠癌石蜡标本中ＴＩＭＰ－１、ＴＩＭＰ－２的表达及新生血管密度（ＭＶＤ）,并应用图像分析的方法定量分析ＴＩＭＰ－、、ＴＩＭＰ－２在肿瘤中的表达及与ＭＶＤ之间的关系。结果 无血管转移组ＭＶＤ低于有血管转移组（Ｐ〈０．０５）;低ＭＶＤ组癌组织ＴＩＭＰ－２平均光密度（ＭＯＤ）高于高ＭＶＤ组（Ｐ〈０．０     

不同亚型肾细胞癌的微血管密度与临床病理因素的关系

目的 探讨 CD34和CD31在不同亚型肾细胞癌(RCC)中的表达,及其标记的微血管密度(MVD)与RCC临床病理因素之间的关系.方法 采用免疫组化SP法,检测CD34和CD31在149例RCC组织(肾透明细胞癌76例,肾乳头状癌42例,肾嫌色细胞癌31例)中的表达情况.结果 肾透明细胞癌、肾嫌色细胞癌和肾乳头状癌组织中CD34 标记的MVD分别为128.04±46.44、48.55±14.09和38.12±10.98,CD31标记的MVD分别为98.35±55.05、30.70±17.72和21.60±9.38,肾透明细胞癌组织中CD34标记的MVD和CD31标记的MVD均明显高于肾非透明细胞癌组织(均P<0.01).在肾嫌色细胞癌和肾乳头状癌组织中,CD34标记的MVD均明显高于CD31 标记的MVD(均P<0.01).CD34和CD31标记的MVD均与肾透明细胞癌的组织学分级呈负相关(r_(CD34)=-0.618,P<0.01;r_(CD31)=-0.442,P<0.01),也与临床分期呈负相关(r_(CD34)=-0.283,P<0.05;r_(CD31)=-0.256,P<0.05),其中CD34的相关性较强;但与肾非透明细胞癌的组织学分级和临床分期无明显的相关性(均P>0.05).结论 CD34 和 CD31均能清晰地、选择性地显示RCC的MVD,但CD34比CD31更敏感.肾透明细胞癌的MVD显著高于肾非透明细胞癌.肾透明细胞癌的MVD与组织学分级和临床分期呈负相关,而肾非透明细胞癌的MVD与组织学分级和临床分期并无相关性.     

Correlation of four vascular specific growth factors with carcinogenesis and portal vein tumor thrombus formation in human hepatocellular carcinoma

The aim of the present study was to detect the correlation between the expression of vascular endothelial growth factor (VEGF), angiopoietin 2 (Ang2), ephrinB2 and endocrine gland-derived vascular endothelial growth factor (EG-VEGF) and carcinogenesis or portal vein tumor thrombus (PVTT) formation in human hepatocellular carcinoma (HCC). The expression of VEGF, Ang2, ephrinB2 and EG-VEGF was detected by RT-PCR in 54 cases HCC without PVTT (group A), 9 cases HCC with PVTT (group B), 10 normal liver tissues (group D) and 10 cirrhosis tissues (group C). The samples were also stained with CD34 by immunohistochemistry. Quantitation of microvessel density (MVD) and semi-quantitation of VEGF, Ang2, ephrinB2 and EG-VEGF expression were analyzed to find the relations. The MVD was 146.69 +/- 77.79, 214.07 +/- 54.41, 32.85 +/- 8.49 and 34.83 +/- 8.29 in group A-D respectively with significant difference (F = 19.77, P = 0.000). The MVD in group A was higher than that in group C P = 0.006, but lower than that in group B P < or = 0.05 or 0.01. The expression levels of VEGF165, VEGF189, Ang2 and EG-VEGF mRNA were significantly different among the groups. The expression levels of VEGF165, Ang2 and EG-VEGF mRNA in group A were all higher than those in group C, but lower than those in group B P < 0.05 or 0.01. The MVD was significantly correlated with VEGF165, VEGF189, Ang2 and EG-VEGF mRNA with Spearman's related coefficient being 0.764, 0.510, 0.640 and 0.366 in HCC (P = 0.000, 0.000 0.000 and 0.003). In conclusion VEGF, Ang2 and EG-VEGF mRNA may play a role in angiogenesis and carcinogenesis of HCC. They can promote PVTT formation in HCC by modulating angiogenesis.     

卵巢肿瘤组织中血管内皮生长因子表达和微血管密度与其临床病理的关系

 目的　探讨卵巢肿瘤组织中VEGF表达和MVD与其临床病理的关系。方法　对 5 4例卵巢恶性肿瘤及对照采用SABC免疫组织化学法测定其VEGF表达和MVD。结果　 (1)恶性肿瘤组织中的VEGF表达和MVD明显高于良性肿瘤和正常卵巢组织 (P <0 .0 1)。 (2 )恶性肿瘤中有肝转移者 ,其MVD明显高于无肝转移者 (P <0 .0 5 )。 (3)恶性肿瘤组织中VEGF阳性表达和MVD丰富者的平均总生存期虽短于VEGF阴性表达和MVD不丰富者。但二者累积生存率均无显著性差异 (P >0 .0 5 )。结论　恶性肿瘤组织中的VEGF阳性表达和MVD明显增高并与是否出现肝转移灶呈正相关 ,但与其它临床病理及预后的相关性尚待确定。     

Angiogenesis in relation to clinical stage, apoptosis and prognostic score in myelodysplastic syndromes

The International Prognostic Scoring System (IPSS), based on the number of cytopenias, percentage of bone marrow blasts and cytogenetics, is an important prognostic tool for patients with myelodysplastic syndrome (MDS). In addition, factors such as high bone marrow cellularity and lactate dehydrogenase levels have been associated with an adverse outcome, spontaneously and after chemotherapy. Recently, increased bone marrow angiogenesis, measured as, e.g. microvascular density (MVD), was reported to be more intense in high-risk than in low-risk MDS. To assess the prognostic role of MVD in MDS, a cohort of 56 patients, thoroughly investigated for various clinical and morphological parameters, were followed-up for survival > or =60 months after the diagnostic analysis. As a group MDS patients had higher MVD compared to healthy controls (p<0.02). The highest median MVD value was observed in the RAEB group, but there was no overall significant difference between the FAB groups. No significant correlations were observed between MVD and peripheral blood counts, bone marrow cellularity, percentage of bone marrow blasts and CD34 positive cells, apoptotic index (TUNEL), proliferation index (MIB-1), erythroid index, FAB group and IPSS score. MVD was not correlated to overall survival. In contrast, bone marrow blast count <5%, low or normal cellularity, as well as a high erythroid index, indicated a favorable survival. Thus, our data do not support an important prognostic role of angiogenesis, reflected by microvessel density, in the myelodysplastic syndromes.     

胃癌基质金属蛋白酶-2与血管生成的关系

背景与目的:肿瘤的增殖和转移依赖于血管生成,实验研究证明基质金属蛋白酶-2(matrixmetalloproteinase-2,MMP-2)在肿瘤血管生成中有重要作用。本研究的目的是观察胃癌组织、癌旁组织和手术切缘区正常组织中基质金属蛋白酶-2(matrixmetalloproteinase-2,MMP-2)表达及其与微血管密度(microvesseldensity,MVD)的关系,探讨MMP-2对胃癌血管生成的作用和意义。方法:应用S-P法,对50例胃癌手术切除标本进行抗人MMP-2单克隆抗体和抗因子FⅧ相关抗原抗体(FⅧRAg)免疫组织化学染色,检测癌组织、癌旁组织、手术切缘区正常组织各区域MMP-2表达和MVD,并分析MMP-2表达与MVD及它们与胃癌临床病理特征之间的关系。结果:癌组织MMP-2高表达显著高于癌旁组织(64%比28%,χ2=7.48,P<0.01),癌旁组织MMP-2低表达亦明显高于切缘区正常组织(52.0%比26.0%,χ2=6.18,P<0.05)。无论在癌组织、癌旁组织MMP-2高表达的MVD均显著高于MMP-2低表达者(30.71±7.41比26.15±4.82,t=2.11,P<0.05;15.31±5.23比9.61±2.17,t=3.98,P<0.01)。此外,在浸润浆膜、低分化及伴有淋巴结转移、肝脏转移的癌组织MMP-2高表达(81%比51.7%,χ2=4.67,P<0.05;87.0%比44.4%,χ2=9.47,P<0.01;81.8%比50.0%,χ2=5.41,P<0.05;89.5%比48.4%,χ2=8.63,P<0.01)及其MVD(