Increased serum levels of soluble CD146 and vascular endothelial growth factor receptor 2 in patients with exudative age-related macular degeneration

AIM: To investigate serum levels of soluble CD146(s CD146) and vascular endothelial growth factor receptor 2(VEGFR2) in patients with age-related macular degeneration(AMD). METHODS: Eighty-eight patients with exudative AMD and 45 sex-and age-matched healthy controls were enrolled in this study conducted in China. Serum samples was obtained from the patients with exudative AMD and from the controls. Serum sCD146 and VEGFR2 protein levels were measured using an enzyme-linked immunosorbent assay.RESULTS: We found that serum sCD146 and VEGFR2 protein levels were significantly higher in the patients with exudative AMD group than in the controls(t=3.859, P<0.001 and t=3.829, P<0.001, respectively). Serum sCD146 levels were significantly higher in patients with classic choroidal neovascularization(CNV) than in those with occult CNV(t=9.899, P<0.001). There was a significant difference in the trend for exudative AMD in the highest versus lowest quartile of circulating sCD146 levels(χ2=10.29, P=0.001). The receiver operating characteristic curve analysis showed that the area under the curve was 0.696 for s CD146(95%CI: 0.601-0.791) with an optimum diagnostic cut-off value of 157.16 ng/mL, a sensitivity of 55.7%, and a specificity of 82.2%.CONCLUSION: The serum sCD146 level increases and may be a biomarker for exudative AMD.

Correlation of Vascular Endothelial Growth Factor and CD105-Microvascular Density in Primary Pterygium

The relationship between the expression of vascular endothelial growth factor（VEGF） and microvascular density（MVD） marked by CD105（CD105-MVD）,and that between CD105-MVD and the clinicopathological characteristics of primary pterygium were investigated.The streptavidin-biotin complex（SABC） immunohistochemical staining in paraffin-embedded tissues was used to detect the expression of VEGF in 23 cases of primary pterygia and 7 normal conjunctival specimens.The antibody against CD105 was used to display vascular endothelial cells,and MVD was examined by counting the CD105-positive vascular endothelial cells.The correlations of VEGF and CD105-MVD,and those of CD105-MVD and clinicopathological data were analyzed by using SPSS 12.0.The expression of VEGF was significantly increased in epithelia（P=0.000）,endothelia and stroma cells（P=0.005） in primary pterygia as compared with normal conjunctivae.The CD105-MVD in pterygia（mean 19.22±6.68） was higher than that in normal conjunctivae（mean 4.00±2.15,P=0.000）.MVD in pterygia was significantly associated with the Tan classification（P=0.000） and the VEGF expression level in the stroma（P=0.020）,but not with sex（P=0.61）,age（P=0.150） or the VEGF expression level in the epithelia（P=0.518）.Our results suggest that over-expression of VEGF and high CD105-MVD in primary pterygium may contribute to the progression by increasing angiogenesis and growth of primary pterygium.

CD74 and macrophage migration inhibitory factor as therapeutic targets in gastric cancer

AIM:To investigate the relationship and molecular features of CD74/macrophage migration inhibitory factor(MIF)/Toll-like receptor 4(TLR4) in gastric cancer.METHODS:CD74,MIF and TLR4 expression in the paraffin-embedded sections of gastric cancer from 120 patients were detected by immunohistochemical staining.Knock down of CD74 expression in gastric cancer cell line MKN-45 was performed by lentivirus transduction and detected by Western blotting.MKN-45 cell proliferation assay under the stimulants was measured by the cell counting kit 8(CCK8) assay and MIF concentration in the culture medium was detected by enzymelinked immunosorbent assay.Surface staining of CD74 in the MKN-45 cell line under the stimulation of lipopolysaccharide(LPS) was measured by flow cytometry.MIF,CD74 and TLR4 co-localization in the MKN-45 cell line was performed by the immunoprecipitation.RESULTS:CD74,MIF and TLR4 were found to be expressed in gastric cancer and increased significantly in the advanced stage,and were also associated with lymph node metastasis.Correlation analysis revealed that CD74 was positively correlated with MIF(r = 0.2367,P < 0.01) and both proteins were also associated with TLR4(r = 0.4414,r = 0.5001,respectively,P < 0.01).LPS can significantly promote MKN-45 cell proliferation(3.027 ± 0.388 vs 4.201 ± 0.092,P < 0.05),induce MIF production(54.333 ± 2.906 pg/mL vs 29.667 ± 3.180 pg/mL,P < 0.01) and cell surface expression of CD74(75.6% ± 4.046%vs 9.4% ± 0.964%,P < 0.01) at LPS concentration of 1 μg/mL compared to medium control.Knockdown of CD74 or using antiCD74 and MIF antagonist ISO-1 significantly reduced LPS-induced MKN-45 cell proliferation(4.201 ± 0.092 vs 3.337 ± 0.087,4.534 ± 0.222 vs 3.368 ± 0.290,4.058 ± 0.292vs 2.934 ± 0.197,respectively,P < 0.01).MIF,CD74 and TLR4 could co-localize in the MKN-45 cell line.CONCLUSION:Upregulation of MIF,CD74 and TLR4 are associated with increasing clinical stage and provide an opportunity as novel gastric cancer chemoprevention and/or treatment strategy.

Hypoxia-inducible factor-1α–mediated upregulation of CD99 promotes the proliferation of placental mesenchymal stem cells by regulating ERK1/2

BACKGROUND As human placenta-derived mesenchymal stem cells(hP-MSCs)exist in a physiologically hypoxic microenvironment,various studies have focused on the influence of hypoxia.However,the underlying mechanisms remain to be further explored.AIM The aim was to reveal the possible mechanisms by which hypoxia enhances the proliferation of hP-MSCs.METHODS A hypoxic cell incubator(2.5%O2)was used to mimic a hypoxic microenvironment.Cell counting kit-8 and 5-ethynyl-20-deoxyuridine incorporation assays were used to assay the proliferation of hP-MSCs.The cell cycle was profiled by flow cytometry.Transcriptome profiling of hP-MSCs under hypoxia was performed by RNA sequencing.CD99 mRNA expression was assayed by reverse transcription-polymerase chain reaction.Small interfering RNA-mediated hypoxia-inducible factor 1α(HIF-1α)or CD99 knockdown of hP-MSCs,luciferase reporter assays,and the ERK1/2 signaling inhibitor PD98059 were used in the mechanistic analysis.Protein expression was assayed by western blotting;immunofluorescence assays were conducted to evaluate changes in expression levels.RESULTS Hypoxia enhanced hP-MSC proliferation,increased the expression of cyclin E1,cyclin-dependent kinase 2,and cyclin A2,and decreased the expression of p21.Under hypoxia,CD99 expression was increased by HIF-1α.CD99-specific small interfering RNA or the ERK1/2 signaling inhibitor PD98059 abrogated the hypoxia-induced increase in cell proliferation.CONCLUSION Hypoxia promoted hP-MSCs proliferation in a manner dependent on CD99 regulation of the MAPK/ERK signaling pathway in vitro.

Temperature Dependence of the Static Structure Factor of the Non－simple Liquid Metal， Cd

Report a calculation or the static structure factors at any temperature for the non-simple liquid metal Cd by the method or model parameter based on the hard sphere cluster(HSC)model.In comparison with available experimental data,the theoretical results are in good agreement with experiments.

基于作物Cd富集系数的土壤有效态Cd化学浸提方法筛选

土壤中镉(Cd)被作物吸收的程度及其生态风险取决于土壤中Cd的赋存形态,基于Cd有效形态的污染土壤风险评价及在此基础上制订污染土壤修复安全阈值是Cd污染农田土壤风险评价和治理亟待解决的问题。目前针对土壤中重金属有效态的化学浸提方法较多,但缺乏针对不同性质土壤中有效态Cd的普适性浸提方法已成为Cd污染土壤风险评价技术瓶颈。本研究采集了全国9个不同性质农田土壤,以水稻、小白菜和玉米为测试作物,通过外源添加方法制备Cd污染土壤,结合土壤培养和盆栽实验,测定了5种常用化学浸提方法,包括中性无机盐浸提方法(CaCl_(2)浸提法)、弱酸浸提法(HCl浸提法)、络合螯合剂浸提方法(DTPA和ETPA浸提法)和组合浸提方法(Mehlich-3(M3)浸提法)对不同性质土壤中有效态Cd浸提效果及其与作物Cd吸收的量化关系,筛选适用于不同性质土壤中有效态Cd的通用浸提方法。结果表明,不同化学浸提法提取的土壤有效态Cd含量间具有显著差异,不同浸提方法对土壤中Cd的浸提率(%)为DTPA≈EDTA≈HCl>M3≈CaCl_(2)。不同化学浸提态Cd与作物Cd吸收的相关系数间具有显著差异,基于综合相关系数方法,得出5种不同浸提态Cd与作物Cd吸收的综合相关系数为I M3=0.765,I EDTA=0.641,I DTPA=0.627,I HCl=0.606,I CaCl_(2)=0.711,M3浸提态Cd含量与不同性质土壤中水稻、小白菜和玉米植株地上部Cd相关性最高,可作为不同性质土壤中有效态Cd通用浸提方法。相关研究结果可为农田土壤中Cd有效态评价及Cd污染农田的修复提供理论依据。

Risk Factors, Clinical Features, Baseline Alanine Aminotransferase and CD4+ Count of Children with HIV Co-Infection with Hepatitis B and C at a Tertiary Hospital in Southwest Nigeria

Background: Human immunodeficiency virus and hepatitis B and C viruses are endemic in sub- Saharan African countries including Nigeria. Researchers have studied the burden of co-infection of HIV with hepatitis B and hepatitis C but the risk factors and clinical presentation have not been much addressed especially in children. Methodology: This was a prospective cross sectional study that determined the prevalence, risk factors, clinical features, baseline CD4+ count, CD4+ percentage, and alanine aminotransferase (ALT) of newly diagnosed, HAART na?ve HIV co-infection among children who were managed at a Tertiary Hospital in Ilorin, Nigeria. Result: Of the 60 HIV- infected children recruited, 11.7% had HIV co-infection with HBV or HCV. Children with co-infec- tions (mean age 8.43 ± 2.37 years) were significantly older than their HIV mono-infected counterparts (mean age 5.25 ± 3.96 years) (p = 0.011). There was no significant difference between HIV monoinfection and HIV co-infection with respect to gender (p = 0.758), ethnicity (p = 0.707), religion of parents (p = 0.436), family type (p = 0.184), social class (p = 0.535), previous transfusion (p = 0.053), scarification (p = 0.612), female genital mutilation (p = 0.778), and sharing of clippers (p = 0.806). The mean BMI, immunological staging (p = 0.535), baseline ALT (p = 0.940), and mean baseline CD4+ count (p = 0.928) were comparable. However, the body mass index of HIV co-infec- ted children decreased with age up till age 10 years. Conclusion: There were no risk factors, nor clinical features predictive of co-infection identified in this study. Co-infection did not negatively impact baseline, CD4+ count and ALT.

TWEAK、CD163在初诊系统性红斑狼疮合并肾脏损伤患者单核细胞中的表达及意义

目的检测系统性红斑狼疮(SLE)合并肾脏损伤(SLE+RI)患者单核细胞中的TWEAK、CD163表达水平,探讨其在SLE及SLE+RI诊断中的应用价值。方法应用实时荧光定量聚合酶链反应(RT-qPCR)法对58例SLE患者及各对照组患者单核细胞中TWEAK、CD163的表达水平进行测定。分析SLE+RI患者单核细胞中TWEAK、CD163的表达水平与实验室检查、临床表现的关系。应用受试者工作特征(ROC)曲线分析TWEAK、CD163对SLE+RI诊断及鉴别诊断的敏感度及特异度。结果SLE组单核细胞中TWEAK、CD163的表达水平高于HC和RA组,SLE+RI组高于SLE-RI组,抗双链DNA抗体(anti-dsDNA)阳性患者表达水平高于anti-dsDNA阴性患者,尿蛋白阳性患者高于尿蛋白阴性者;SLE+RI组治疗后二者表达水平低于治疗前(P<0.05)。SLE和SLE+RI组单核细胞中TWEAK、CD163表达水平与SLE活动度评分(SLEDAI)呈正相关。ROC曲线分析显示,TWEAK表达在区分SLE+RI疾病组与SLE-RI组的曲线下面积(AUC)为0.829;CD163在区分SLE+RI组与SLE-RI组的AUC为0.783,联合单核细胞中TWEAK、CD163的表达在区分SLE+RI组与SLE-RI组的AUC为0.792。结论SLE组TWEAK、CD163表达水平升高,且SLE组表达水平高于SLE-RI组,同时与疾病活动性、自身抗体以及临床症状密切相关,可作为SLE+RI的诊断及活动性标志物。

Preliminary evidence of renal function improvement in chronic progressive kidney disease using autologous CD34+cell therapy:A clinical trial

BACKGROUND To date,no specific treatment has been established to reverse progressive chronic kidney disease(CKD).AIM To evaluate the safety and efficacy of autologous CD34^(+)cell transplantation in CKD patients who exhibited a progressive decline in renal function.METHODS The estimated glomerular filtration rate(eGFR)at the beginning of the study was 15.0-28.0 mL/minute/1.73 m^(2).After five days of treatment with the granulocyte colony-stimulating factor,mononuclear cells were harvested and CD34^(+)cells were magnetically collected.CD34^(+)cells were directly injected into the bilateral renal arteries twice(at 0 and 3 months),and their safety and efficacy were evaluated for 6 months.RESULTS Four patients were enrolled and completed the study.Three of four patients showed improvement in eGFR slope(eGFR slope>0 mL/minute/1.73 m^(2)),with the monthly slope of eGFR(delta eGFR)changing from-1.36±1.1(pretreatment)to^(+)0.22±0.71(at 6 months)mL/minute/1.73 m^(2)/month(P=0.135)after cell therapy.Additionally,intrarenal resistive index(P=0.004)and shear wave velocity(P=0.04)were significantly improved after cell therapy.One patient experienced transient fever after cell therapy,and experienced bone pain during granulocyte colony-stimulating factor administration.However,no severe adverse events were reported.CONCLUSION In conclusion,our findings suggest that repetitive peripheral blood-derived autologous CD34^(+)cell transplantation into the renal arteries is safe,feasible,and may be effective for patients with progressive CKD.However,a large-scale clinical trial is warranted to validate the efficacy of repetitive regenerative cell therapy using autologous CD34^(+)cells in patients with progressive CKD.

改性生物炭吸附固定环境中Cd(Ⅱ)/Pb(Ⅱ)的研究进展

吸附法常用于修复环境中Cd(Ⅱ)/Pb(Ⅱ)的复合污染。环境友好、成本低廉的生物炭成为广泛应用的吸附剂,但存在吸附常量有限、选择性差等缺点,为此常采用改性来增强其吸附固定效果。综合分析了改性生物炭吸附固定镉、铅的影响因素,包括生物炭的原料、改性方法及改性剂种类和浓度、热解温度、Cd(Ⅱ)/Pb(Ⅱ)的竞争、投加量、pH值和干扰离子及改性生物炭吸附固定重金属的机理。最后强调通过调控条件改变生物炭性质提高吸附能力,展望指出需深化复合污染环境下改性方法、生物炭在环境中长期稳定性的研究,实现更有效的重金属修复。

皖南尖吻蝮蛇蛇毒内抗凝血因子（ACF）的二级结构和金属离子对其影响的CD谱研究

利用ＣＤ谱对皖南尖吻蝮蛇蛇毒内抗凝血因子（ＡＣＦ）的二级结构，即α－螺旋、β－折叠和无规则卷曲进行了测定，利用ＣｈｅｎａｎｄＹａｎｇ的方法计算出了它们在ＡＣＦ分子内的百分比．溶液的ｐＨ值对ＡＣＦ的二级结构影响不大，但当ｐＨ位于５和６时，二级结构稍稍出现了异常．这可能是由于氢离子电离引起的电荷变化带来的效应．ＡＣＦ的脱钙破坏了分子内的配位结构，而使α－螺旋的百分比大大降低．尽管三价镧系离子能取代ＡＣＦ中的钙离子，但是没有给ＡＣＦ的二级结构带来较大的影响．

CD14基因启动子区多态性与缺血性脑卒中及血脂的相关分析

目的探讨CD14基因启动子-159C／T、-260C／T多态性与缺血性脑卒中的相关性，并对其与血脂、脂蛋白水平的关系进行分析。方法应用PCR-RFLP的方法检测132例缺血性脑卒中患者（缺血性脑卒中组）和145例对照组的CD14基因型；同时按常规方法测定血浆脂质、脂蛋白水平。结果缺血性脑卒中组总胆固醇、甘油三酯、低密度脂蛋白胆回醇水平明显高于对照组（P〈0．05），CD14基因-159C／T多态性在两组人群中的分布差异有显著性意义（P〈0．05），等位基因频率的相对风险分析发现，C等位基因携带者患缺血性脑卒中的风险是T等位基因的1．556倍（OR=1．556，95％CI=1．108—2．184），携带C等位基因的缺血性脑卒中个体血浆低密度脂蛋白胆固醇水平显著高于不携带者（P〈0．05）。结论CD14基因-159C／T多态性与缺血性脑卒中的发病具有相关性，其中C等位基因是缺血性脑卒中的遗传危险因素；CD14基因-159C／T多态性可能通过影响血脂水平而影响缺血性脑卒中的发生。

玉米秸秆生物炭对Cd^(2+)的吸附特性及影响因素

以玉米秸秆生物炭为实验材料,研究了生物炭吸附重金属Cd2+的性能,分析了吸附温度、吸附时间、初始pH值以及生物炭粒径对吸附的影响,并对吸附前后生物炭样品进行傅里叶变换红外光谱分析(FITR)、X-射线衍射(XRD)和X-射线光电子能谱(XPS)表征以分析吸附机理。结果表明:玉米秸秆生物炭对Cd2+的吸附可用Langmuir等温方程较好地拟合,在不同温度下其饱和吸附量分别为18.49 mg·g-1(288.15 K)、23.51 mg·g-1(298.15 K)、23.59 mg·g-1(308.15 K)和24.43 mg·g-1(318.15 K),吸附动力学过程可以由准二级动力学方程很好地拟合,约40 min即达平衡,pH值为5时吸附量最大,生物炭粒径对吸附无明显影响。结构表征表明,生物炭对Cd2+的吸附机理主要为表面羟基(-C-OH)和羰基(-C=O)与Cd2+发生络合化学反应作用。

胡敏酸吸附重金属Cu^(2+)Pb^(2+)Cd^(2+)的特征及影响因素

采用碱溶酸沉淀法提取腐殖质中的胡敏酸,研究了胡敏酸对Cu2+、Pb2+、Cd2+的吸附特征及作用机理。结果表明,在相同初始浓度下,胡敏酸对Cu2+的吸附强度要大于对Pb2+和对Cd2+的吸附。吸附强度顺序为Cu2+>Pb2+>>Cd2+。Langmuir、Freundlich和Temkin方程对Pb2+、Cd2+的吸附呈显著关系,但其中Freundlich方程为最佳拟合方程;对Cu2+的吸附,Langmuir等温式拟合程度最高,Freundlich方程其次,Temkin方程则不适合。pH是影响胡敏酸对Cd2+和Cu2+吸附的主要因素,而对Pb2+吸附的影响较小。总体上低pH值均不利于吸附剂对重金属离子的吸附,随着pH值的增加(pH=2~8),不论吸附量还是吸附率都呈上升趋势。通过红外光谱表征反应物,结果表明,胡敏酸与Pb2+、Cd2+的结合点主要发生在羧基和酚羟基之间,而Cu2+与胡敏酸的结合除了在羧基和酚羟基之间外,更多地发生在羧基和羧基之间。

区域土壤Cd和Cr空间分布的影响因素研究

以种粮大县肇源为研究区,对土壤表层Cd、Cr两种元素水平空间变异及分布特征的影响因素进行深入探讨。结果表明:(1)肇源县土壤表层重金属Cd和Cr的平均含量分别为0.078、46.006 mg/kg,略高于松嫩平原土壤背景值。表层土壤Cd的块金效应为0.432,具有中等程度的空间自相关性;表层土壤Cr的块金效应为0.227,存在强烈的空间自相关性。Cd、Cr元素的空间自相关表现出较为明显的各向异性,均在45°(东北-西南)和135°(东南-西北)方向上空间自相关最强烈。(2)表层土壤和成土母质中Cd和Cr元素含量相关分析结果显示,相关系数分别为0.167、0.639,在P<0.01水平上显著相关;不同成土母质类型区域表层土壤中Cd和Cr元素含量的方差分析结果显示,方差齐性检验显著性分别为0.627和0.975,表明成土母质是表层土壤重金属元素Cd和Cr水平空间分布的主要影响因素。(3)研究区内表层土壤Cd和Cr元素的空间分布还受土壤类型、pH、土地利用及覆被类型的影响。

壳聚糖／纳米CdS复合颗粒可见光光催化降解猩红B动力学研究

采用仿生矿化法制备了壳聚糖/纳米CdS复合颗粒光催化剂,并用于可见光光催化降解猩红B染料模拟废水,研究了猩红B初始浓度、pH、催化剂投加量和催化剂重复使用次数等因素对猩红B光催化降解的影响。X射线衍射(XRD)分析表明,壳聚糖能有效负载CdS纳米微晶。采用Langmuir-Hinshelwood模型描述壳聚糖/纳米CdS复合颗粒可见光光催化降解猩红B反应动力学行为,在猩红B初始质量浓度较低(≤20 mg/L)时,光催化降解过程符合假一级动力学方程。降低猩红B初始浓度和溶液pH都可显著增大光催化降解速率常数;催化剂投加量小于0.7 g/L时,光催化降解速率随其增加而增大,但催化剂投加量过大会使光催化降解速率减小;催化剂重复使用第5次时,猩红B光催化降解速率常数仍为第1次使用时的63.4%。

聚焦超声治疗前后外阴白色病变组织中VEGF、bFGF和CD34表达的检测及其意义

目的:探讨VEGF、bFGF和CD34在聚焦超声治疗前后的外阴白色病变组织中表达率的变化情况,阐明聚焦超声治疗外阴白色病变的可能机制。方法:采取免疫组织化学SP法检测30例外阴白色病变组织、15例经聚焦超声治疗后1个月和8例治疗后3个月外阴白色病变患者病变组织中VEGF、bFGF和CD34的表达情况,比较三者在治疗前后的阳性细胞表达率。结果:聚焦超声治疗后VEGF和bFGF在外阴白色病变组织中的表达高于治疗前(P<0.05);聚焦超声治疗前后CD34在外阴白色病变组织中的表达差异无统计学意义(P>0.05)。结论:聚焦超声治疗可使外阴白色病变组织中VEGF和bFGF的表达升高,其机制可能是通过改善外阴白色病变局部组织神经微血管结构和功能使外阴白色病变组织恢复至正常。

污灌区盐渍化土壤重金属Cd的形态分析及其影响因素

以受盐渍化及重金属Cd污染的天津污灌区土壤作为研究对象,探讨盐渍化土壤重金属的形态分布及其影响因素。研究的盐分种类主要为NaCl和Na_2SO_4,盐度7个[添加质量分数依次为0%(CK)、0.2%、0.4%、0.6%、1%、2%和5%],采用Tessier连续提取法测定土壤前3种重金属的形态(可交换态、碳酸盐结合态、铁锰氧化态),得出重金属的形态分布规律。结果表明:在添加NaCl盐度条件下,土壤中Cd碳酸盐结合态>可交换态>铁锰氧化态,可交换态含量与盐度、重金属总量、pH值和有机质均呈显著相关。在添加Na_2SO_4盐度条件下,土壤中Cd铁锰氧化态>可交换态>碳酸盐结合态,可交换态、碳酸盐结合态与pH值和有机质均呈极显著相关,铁锰氧化态与pH值呈显著负相关。盐度与Cd各形态也有不同程度的相关性。在添加NaCl盐度条件下,pH值对可交换态含量有重要影响;有机质对碳酸盐结合态含量有重要影响;Cd含量对铁锰氧化态含量有重要影响。在添加Na_2SO_4盐度条件下,有机质对可交换态含量有重要影响;pH值、有机质对碳酸盐结合态含量有重要影响;CEC对铁锰氧化态含量有重要影响。得出的Cd形态分布规律以及土壤各理化性质对Cd形态含量的影响分析对土壤重金属的污染防治和生态风险评价提供了基本的理论依据。

造血细胞生长因子对脐血CD_(34)^+细胞短期体外扩增的作用

目的 探讨造血细胞生长因子 (HGF)的不同组合对脐血 CD34 + 细胞短期体外扩增的作用。 方法 用免疫磁珠法分离纯化脐血 CD34 +细胞 ,培养于无血清培养液中。加入不同的细胞因子 ,于第 4 ,7,10 ,14天检测 CD34 +细胞百分率和有核细胞 (NC)总数。 结果 和对照组相比 ,各组的 NC扩增倍数随着培养时间的延长呈不同程度的增加 ,干细胞在 FL、TPO、GM- CSF、SCF、IL - 6、G- CSF、EPO和 IL - 3等因子作用下 ,NC扩增倍数在培养第 14天达高峰 ,为32 8.96倍 ;而 CD34 +细胞扩增倍数在培养第 7天达最高峰 ,但在 FL、TPO、GM- CSF、SCF、IL- 6、G- CSF等因子作用下 ,CD34 + 细胞扩增倍数最大 ,7d后达 2 5 .2 3倍 ,而后随着培养时间的延长而逐渐下降。 结论 脐血 CD34 + 细胞在HGF作用下 ,扩增时间以 7～ 10

HER2与CD163在胃癌中的表达及意义

目的研究人表皮生长因子受体-2(human epidermal growth factor receptor-2,HER2)与M2型巨噬细胞表面标志物分化抗原簇163(cluster of differentiation 163,CD163)在胃癌组织中的表达及意义。方法应用免疫组织化学方法检测45例胃癌和癌旁组织标本中HER2、CD163和CD68蛋白的表达,并将检测结果与患者临床病理资料相结合进行综合分析。结果胃癌组织中的CD163^+和CD68^+细胞数目高于癌旁组织(均P<0.05),HER2阳性表达在肿瘤p TNM分期、有无淋巴结转移等方面差异有统计学意义(均P<0.05)。CD163^+M2巨噬细胞数在肿瘤p TNM分期方面差异有统计学意义(P<0.05)。HER2蛋白表达与CD163^+M2性巨噬细胞数目存在相关性(r=0.61,P<0.05)。结论 HER2表达强度与M2型巨噬细胞数目存在相关性,二者是判断胃癌诊断、治疗及预后的重要参考指标。