Cinnamon extract suppresses experimental colitis through modulation of antigen-presenting cells

AIM:To investigate the anti-inflammatory effects of cinnamon extract and elucidate its mechanisms for targeting the function of antigen presenting cells.METHODS:Cinnamon extract was used to treat murine macrophage cell line(Raw 264.7),mouse primary antigen-presenting cells(APCs,MHCII+) and CD11c+dendritic cells to analyze the effects of cinnamon extract on APC function.The mechanisms of action of cinnamon extract on APCs were investigated by analyzing cytokine production,and expression of MHC antigens and co-stimulatory molecules by quantitative real-time PCR and flow cytometry.In addition,the effect of cinnamon extract on antigen presentation capacity and APC-dependent T-cell differentiation were analyzed by [H3]-thymidine incorporation and cytokine analysis,respectively.To confirm the anti-inflammatory effects of cinnamon extract in vivo,cinnamon or PBS was orally administered to mice for 20 d followed by induction of experimental colitis with 2,4,6 trinitrobenzenesulfonic acid.The protective effects of cinnamon extract against experimental colitis were measured by checking clinical symptoms,histological analysis and cytokine expression prof iles in inflamed tissue.RESULTS:Treatment with cinnamon extract inhibited maturation of MHCII+ APCs or CD11c+ dendritic cells(DCs) by suppressing expression of co-stimulatory molecules(B7.1,B7.2,ICOS-L),MHCII and cyclooxygenase(COX)-2.Cinnamon extract induced regulatory DCs(rDCs) that produce low levels of pro-inflammatory cytokines [interleukin(IL)-1β,IL-6,IL-12,interferon(IFN)-γ and tumor necrosis factor(TNF)-α] while expressing high levels of immunoregulatory cytokines(IL-10 and transforming growth factor-β).In addition,rDCs generated by cinnamon extract inhibited APC-dependent T-cell proliferation,and converted CD4+ T cells into IL-10high CD4+ T cells.Furthermore,oral administration of cinnamon extract inhibited development and progression of intestinal colitis by inhibiting expression of COX-2 and pro-inflammatory cytokines(IL-1β,IFN-γ and TNF-α),while enhancing IL-10 levels.CONCLUSION:Our study suggests the potential of cinnamon extract as an anti-inflammatory agent by targeting the generation of regulatory APCs and IL-10+ regulatory T cells.

Activation of killer cells with soluble gastric cancer antigen combined with anti-CD3 McAb

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｒｅｈａｖｅｂｅｅｎｍａｎｙｒｅｐｏｒｔｓｏｎｃａｎｃｅｒｔｈｅｒａｐｙｗｉｔｈｌｙｍｐｈｏｋｉｎｅａｃｔｉｖａｔｅｄｋｉｌｅｒ（ＬＡＫ）ｃｅｌｓａｎｄｉｎｔｅｒｌｅｕｋｉｎ２（ＩＬ２），ｂｕｔｔｈｅｐｒｏｌｉｆｅ...

The human leucocyte differentiation antigens (HLDA) workshops: the evolv-ing role of antibodies in research, diagnosis and therapy

The 8^th International Workshop on Human Leucocyte Differentiation Antigens （chaired by HZ and managed by BS） was run over a 4-year period and culminated in a conference in December 2004. Here we review the achievements of the HLDA Workshops and provide links to information on CD molecules and antibodies against them, including the 93 new CDs assigned in the 8^th Workshop. We consider what remains to be achieved （including an estimate of the number of leucocyte surface molecules still to be discovered）, and how the field can best move forward.

Impact of PRRSV on activation and viability of antigen presenting cells

Porcine reproductive and respiratory syndrome(PRRS) is one of the most important diseases of swine industry. The causal agent, PRRS-virus(PRRSV), is able to evade the host immune response and survive in the organism causing transient infections. Despite all scientific efforts, there are still some gaps in the knowledge of the pathogenesis of this disease. Antigen presenting cells(APCs), as initiators of the immune response, are located in the first line of defense against microorganisms, and are responsible for antigen recognition, processing and presentation. Dendritic cells(DCs) are the main type of APC involved in antigen presentation and they are susceptible to PRRSV infection. Thus, PRRSV replication in DCs may trigger off different mechanisms to impair the onset of a host effective immune response against the virus. On the one side, PRRSV may impair the basic functions of DCs by regulating the expression of major histocompatibility complex class Ⅱ and CD80/86. Other strategy followed by the virus is the induction of cell death of APCs by apoptosis, necrosis or both of them. The impairment and/or cell death ofAPCs could lead to a failure in the onset of an efficient immune response, as long as cells could not properly activate T cells. Future aspects to take into account are also discussed in this review.

Key role of human leukocyte antigen in modulating human immunodeficiency virus progression: An overview of the possible applications

Host and viral factors deeply influence the human immunodeficiency virus(HIV) disease progression. Among them human leukocyte antigen(HLA) locus plays a key role at different levels. In fact, genes of the HLA locus have shown the peculiar capability to modulate both innate and adaptive immune responses. In particular, HLA class Ⅰmolecules are recognized by CD8+ T-cells and natural killers(NK) cells towards the interaction with T cell receptor(TCR) and Killer Immunoglobulin Receptor(KIR) 3DL1 respectively. Polymorphisms within the different HLA alleles generate structural changes in HLA classⅠpeptide-binding pockets. Amino acid changes in the peptide-binding pocket lead to the presentation of a different set of peptides to T and NK cells. This review summarizes the role of HLA in HIV progression toward acquired immunodeficiency disease syndrome and its receptors. Recently, many studies have been focused on determining the HLA binding-peptides. The novel use of immune-informatics tools, from the prediction of the HLA-bound peptides to the modification of the HLAreceptor complexes, is considered. A better knowledge of HLA peptide presentation and recognition are allowing new strategies for immune response manipulation to be applied against HIV virus.

Studies on mechanism of Sialy Lewis-X antigen in liver metastases of human colorectal carcinoma

INTRODUCTIONSialyl Lewis-X antigen ,correlated with carcinoma, is a group of carbohydrate antigen containing oligosaccharide expressed of embryonic tisue and glycoproteins on cell surface of embryonic tissue[1].The SLeX antigen located on cell surface is synthesized principally by two enzymes ,al ,3fucosyltransfrease and a2, 3sialyctransferase.In adults ,SLeX antigen is expressed principally on the surfaces of granulocytic cells and some tumor cells .

The Secondary Structure of Heated Whey Protein andIts Hydrolysates Antigenicity

Fourier transform infrared spectroscopy(FTIR) and circular dichroism(CD) were used to investigate the conformational changes of heated whey protein(WP) and the corresponding changes in the hydrolysates immunoreactivity were determined by competitive enzyme-linked immunosorbent assay(ELISA).Results showed that the contents of α-helix and β-sheet of WP did not decrease much under mild heating conditions and the antigenicity was relatively high;when the heating intensity increased(70 ℃ for 25 min or 75 ℃ for 20 min),the content of α-helix and β-sheet decreased to the minimum,so was the antigenicity;However,when the WP was heated at even higher temperature and for a longer time,the β-sheet associated with protein aggregation begun to increase and the antigenicity increased correspondingly.It was concluded that the conformations of heated WP and the antigenicity of its hydrolysates are related and the optimum structure for decreasing the hydrolysates antigeniity is the least content of α-helix and β-sheet.Establishing the relationship between the WP secondary structure and WP hydrolysates antigenicity is significant to supply the reference for antigenicity reduction by enzymolysis.

Detection of microbial antigenic components of circulating immune complexes in HIV patients:Involvement in CD4^+ T lymphocyte count depletion

Objective:To investigate the prevalence of microbial antigenic components of circulating immune complexes amongst grades of CD4 T lymphocyte counts in HIV sero positive and seronegative participants.Methods:Polyethelene glycol(PEG-600) and buffering methods of precipitation and dissociation of immune complexes was used to generate immune solution from sera of 100 HIV sero-positive and 100 HIV sero-negative participants.These were categorized into 3 grades based on CD4 count:】 500 cell/mm,200-499 cell/mm3 and 【200 cell/mm3.The immune solutions were assayed using membrane based immunoassay and antibody titration, along side its unprocessed serum for detection of various microbial antigens and or antibodies. CD4 T cell counts were estimated using Patec Cyflow SL-3 Germany.Results:Antigenic component of immune complexes of various infectious agents was detected in 99 and 70 HIV seropositive and HIV sero-negative participants,respectively.In group A,there were 10 HIV positive participants,including 4(40.0%) had circulating immune complexes(CICs) due to Salmonella species only:1(10.0%) due to Salmonella-Plasmodium falciparum(P.falciparum),SalmonellaP. falciparum-HCV and P.falciparum antigens,respectively.In group B,45(45.4%) HIV seropositive participants with CICs had CD4 T lymphocyte count between 200-499 cells/mm^3.Out of these,20(44.4%) had CICs due to Salmonella species only:9(20%) due to Salmonella-P. falciparum.In group C,there were 44(44.4%) HIV sero-positive participants,including 3(6.8%) due to Salmonella species only:24(54.4%) due to Salmonella-P.falciparum:2(4.5%) due to P. falciparum only.Conclusions:In HIV sero-positive participants,presence of heterogeneity of Salmonella species-P.falciparum antigens was highly incriminated in CD4 count depletion but not homogeneity of malaria parasites antigens.Malaria parasites antigens only were incriminated in CD4^+ count depletion amongst HIV sero-negative participants.Before taking any decision on the management of HIV-1-positive individuals,their malaria and Salmonella paratyphi status should be assessed,but not malaria status alone.

EXPRESSION CLONING OF A PROTECTIVE LEISHMANIA ANTIGEN

Parasite-specific CD8+ T cells have been shown to transfer protection against nLeishmania major in susceptible BALB/c mice.An epitope-tagged expression library was used to identify the antigen recognized by a protective CD8+ T cells clone. The expression library allowed recombinant proteins made in bacteria to be captured by macrophages for presentation to T cells restricted to major histompatibility complex class n. A conserved 36-kilodalton member of the tryptophanaspartic acid repeat family of proteins was identified that was expressed in both stages of the parasite life cycle. A 24-kilodalton portion of this antigen protected susceptible mice when administered as a vaccine with interleukin-12before injection.

Rejection of Experimental Hodgkins Lymphoma by T-Cells Engineered with a CD19 Chimeric Antigen Receptor

T cells engineered to express chimeric antigen receptors (CARs) combining an external antibody binding domain with the CD3ζ T cell receptor (TCR) signaling domain for triggering cell activation are being used for immunotherapeutic targeting of tumor cells in a non-HLA restricted manner. In this study we transduced T cells with a CD19-CAR construct containing a truncated CD34 gene (tCD34) marker and used these to target the B cell antigen CD19 on the surface of a Hodgkin’s lymphoma (HL) cell line (L591) both in vitro and in vivo. Levels of tCD34 expression in transduced peripheral blood mononuclear cells (PBMCs) ranged from 6% - 20% and this was increased to 82% after selection for transduced tCD34+ cells. In vitro cytotoxicity testing on a CD19+ HL cell line (L591) showed specific cell lysis initiated by the CD19-CAR transduced PBMCs. Importantly, CD19-CAR T cells prevented the growth of L591 HL tumor cells when co-injected subcutaneously (sc) in 6/6 severe combined immunodeficient (SCID) mice. There was no evidence of anti-tumor activity when CD19-CAR T cells were infused intravenously (iv) at the same time as L591 HL tumor cells were injected sc. However, 3/6 SCID mice showed tumor rejection within 83 days after iv infusion of CD19-CAR T cells 3 - 9 days after establishment of L591 HL tumors, while all control animals succumbed to tumors within 60 days. Interestingly, immuno-histochemical analysis of L591 HL tumors demonstrated that CD19-CAR T cells were detected not earlier than 11 days after infusion within the tumor mass. These results suggest that CD19 is a potentially attractive target for the immunotherapy of HL.

Regulatory T cells suppress autoreactive CD4^+ T cell response to bladder epithelial antigen

AIM： To investigate the role of regulatory T （Treg） cells in CD4^＋ T cell-mediated bladder autoimmune infammation. METHODS： Urothelium-ovalbumin （URO-OVA）/OT-II mice, a double transgenic line that expresses the membrane form of the model antigen （Ag） OVA as a self-Ag on the urothelium and the OVA-specific CD4^＋ T cell receptor specifc for the I-Ab/OVA323-339 epitope in the periphery, were developed to provide an autoimmune environment for investigation of the role of Treg cells in bladder autoimmune infammation. To facilitate Treg cell analysis, we further developed URO-OVA^GFP-Foxp3/OT-II mice, a derived line of URO-OVA/OT-II mice that express the green fuorescent protein （GFP）-forkhead box protein P3 （Foxp3） fusion protein. RESULTS： URO-OVA/OT-II mice failed to develop bladder infammation despite the presence of autoreactive CD4^＋ T cells. By monitoring GFP-positive cells, bladder infltration of CD4^＋ Treg cells was observed in URO-OVA^GFP-Foxp3/OT-II mice. The infiltrating Treg cells were functionally active and expressed Treg cell effector molecule as well as marker mRNAs including transforming growth factor-β, interleukin （IL）-10, fibrinogen-like protein 2, and glucocorticoid-induced tumor necrosis factor receptor （GITR）. Studies further revealed that Treg cells from URO-OVA^GFP-Foxp3/OT-II mice were suppressive and inhibited autoreactive CD4^＋ T cell proliferation and interferon （IFN）-g production in response to OVA Ag stimulation. Depletion of GITR-positive cells led to spontaneous development of bladder infammation and expression of inflammatory factor mRNAs for IFN-γ, IL-6, tumor necrosis factor-α and nerve growth factor in URO-OVA^GFP-Foxp3/OT-II mice. CONCLUSION： Treg cells specifc for bladder epithelial Ag play an important role in immunological homeostasis and the control of CD4^＋ T cell-mediated bladder autoimmune infammation.

Analysis of CD117-negative gastrointestinal stromal tumors

AIM: To identify the gastrointestinal stromal tumors(GISTs) that are negative for CD117 expression by immunohistochemistry and to characterize their malignant potential.METHODS: A total of 108 primary mesenchymal tumors of the gastrointestinal tract were screened to select CD117-negative tumors, from which KIT(exons 9, 11, 13, and 17)and PDGFRA (exons 10, 12, 14, and 18) were sequenced to identify GISTs. Tumor recurrence and distant metastasis were used as the criteria of malignancy.RESULTS: The result showed that approximately 25%(29/108) of the gastrointestinal mesenchymal tumors were negative for CD117 and approximately 6% (7/108)of the tumors were CD117-negative GISTs. All these CD117-negative tumors had a mutated KITand a wildtype PDGFRA. All CD117-negative GISTs with mutations at codons 557/558 of KIThad mitotic counts ＞10/50 high power field, and 75% (3/4) of them showed multiple recurrence or distant metastasis.CONCLUSION: CD1 17-negative KITmutated GISTs account for approximately 6% of the gastrointestinal mesenchymal tumors. Tumor recurrence or distant metastasis correlates to both theKITmutations at codons 557/558 and the mitotic counts, but not to the tumor size.

三阴性乳腺癌患者CD117、DOG1表达水平与临床病理特征及预后的相关性

目的 探究CD117、DOG1表达水平与三阴性乳腺癌(triple-negative breast cancer, TNBC)患者临床病理特征及预后的相关性。方法 回顾性纳入2000—2011年北京协和医院的TNBC患者。取其肿瘤组织芯片,采用免疫组化法检测肿瘤细胞中CD117、DOG1表达情况,分析二者与患者年龄、肿瘤直径、美国癌症联合委员会(American Joint Committee on Cancer, AJCC)分期、组织学分级、P53、Ki-67增殖指数等临床病理特征的关系,及其对患者生存期的影响。结果共入选符合纳入与排除标准的TNBC患者185例,其中CD117阳性24例(12.97%),DOG1阳性22例(11.89%),二者共表达率为1.62%。相较于肿瘤细胞CD117阴性患者,CD117阳性患者中高Ki-67增殖指数(87.50%比67.70%,P=0.048)、基底样TNBC(95.83%比74.53%,P=0.020)、P53弥漫强阳(33.33%比13.66%,P=0.032)的比例均更高。相较于DOG1阴性患者,DOG1阳性患者中肿瘤直径≤2 cm(22.73%比45.40%,P=0.026)、基底样TNBC(54.55%比80.37%,P=0.015)的比例均更低。中位随访时间71个月(范围:2~170个月),失访4例(2.16%),复发或远处转移66例(35.68%),死亡34例(18.38%)。生存分析显示,AJCC分期(HR=7.624,95%CI:2.187~26.576,P=0.001)及CD117阳性伴P53弥漫强阳(HR=3.942,95%CI:1.366~11.379,P=0.011)与TNBC患者总生存期呈负相关。结论 CD117阳性、DOG1阴性与基底样TNBC具有一定相关性,且CD117阳性伴P53弥漫强阳者总生存期更短,死亡风险增高。

非M3型急性髓系白血病患者骨髓原始细胞酪氨酸蛋白激酶CD117的表达及意义

目的探讨酪氨酸蛋白激酶CD117在非M3型急性髓系白血病(AML)患者的表达及其与AML患者疗效和预后的关系。方法选择2013年1月至2018年6月淮安市第一人民医院收治的83例初诊为非M3型AML患者为研究对象,根据骨髓原始细胞免疫表型流式细胞术检测结果将患者分为CD117抗原阴性组(CD117-组,n=40)和CD117抗原阳性组(CD117+组,n=43),采用R显带技术分析AML患者的染色体核型,多重反转录聚合酶链式反应法检测AML患者的基因突变情况,结合患者染色体及基因突变结果,将所有患者预后分层为预后良好、预后中等、预后不良。所有患者根据病情选择以下诱导方案中的1种进行化学治疗:(1)IA方案[去甲氧柔红霉素10~12 mg·m^(-2)(第1~3天)+阿糖胞苷100 mg·m^(-2)(第1~7天)];(2)DA方案[柔红霉素60~90 mg·m^(-2)(第1~3天)+阿糖胞苷100 mg·m^(-2)(第1~7天)];(3)HA方案[高三尖杉酯碱2.5 mg·m^(-2)(第1~7天)+阿糖胞苷100 mg·m^(-2)(第1~7天)]。1个疗程后未达完全缓解(CR)的患者可选择原方案或更改诱导方案;达CR的患者选择中大剂量阿糖胞苷(1~2 g·m^(-2),12 h 1次,第1~4天)方案进行巩固化学治疗。患者均完成1个疗程及以上标准诱导化学治疗方案。观察所有患者的CR率、微小残留病(MRD)阴性率及总生存期(OS)。结果2组患者的染色体核型及FLT3、CEBPA、NPM1、C-kit等基因突变状态、预后分层比较差异无统计学意义(P>0.05)。CD117-组1个疗程后CR率为77.50%(31/40),CD117+组1个疗程后CR率为76.74%(33/43);2组患者1个疗程后CR率比较差异无统计学意义(χ^(2)=0.007,P>0.05)。CD117-组达CR患者的MRD阴性率为90.30%(28/31),CD117+组达CR患者的MRD阴性率为57.60%(19/33);CD117-组达CR患者的MRD阴性率显著高于CD117+组(χ^(2)=8.797,P<0.01)。CD117-组患者的中位OS为33.09[95%置信区间(CI):28.22~37.97]个月,CD117+组患者的中位OS为20.61(95%CI:17.89~23.33)个月;CD117-组患者的中位OS显著长于CD117+组(P<0.01)。结论CD117与非M3型AML患者的MRD相关,是影响AML患者预后的因素,对指导AML患者的临床治疗具有重要意义。

CD28、CD117、CXCL12在多发性骨髓瘤患者髓外浸润及其预后中的应用价值

目的探讨CD28、CD117、趋化因子配体12(CXCL12)与多发性骨髓瘤患者髓外浸润的关系及对预后的评估价值,以期为临床早期制订干预方案提供参考。方法选取96例2020年5月至2022年5月在该院就诊的多发性骨髓瘤患者作为研究对象,根据是否发生髓外浸润分为发生组、未发生组,比较两组临床资料及CD28、CD117、CXCL12表达情况,分析CD28、CD117、CXCL12表达与多发性骨髓瘤患者髓外浸润的关系;随访6个月后,比较不同预后患者CD28、CD117、CXCL12表达情况,并分析其对多发性骨髓瘤预后的评估价值。结果本研究96例多发性骨髓瘤患者中发生髓外浸润38例(发生组),未发生58例(未发生组)。发生组CD28、CD117、CXCL12阳性患者比例高于未发生组(P<0.05);多因素Logistic回归分析结果显示,CD28、CD117、CXCL12阳性均为多发性骨髓瘤患者髓外浸润的独立危险因素(P<0.05)。随访6个月后,有21例多发性骨髓瘤患者死亡,且死亡患者入院时CD28、CD117、CXCL12阳性患者比例高于生存患者(P<0.05);多发性骨髓瘤CD28、CD117、CXCL12阳性患者的死亡风险分别为阴性患者的7.091、29.231、20.143倍(P<0.05)。结论CD28、CD117、CXCL12阳性可用于评估多发性骨髓瘤患者髓外浸润情况,为临床早期预测预后提供参考,以针对性地展开后续治疗,改善预后。

成人急性白血病中CD117与CD34共表达的临床意义

背景与目的:c-kit受体(c-kitreceptor,c-kitR,CD117)是干细胞因子受体。CD117在急性非淋巴细胞白血病(acutenon-lymphoblasticleukemia,ANLL)中高表达,可作为髓系免疫学标记物,对诊断ANLL有一定参考价值。但是,CD117也可在部分急性淋巴细胞白血病(acutelymphoblasticleukemia,ALL)中表达。CD34为造血干(祖)细胞抗原标记物,在ANLL和ALL中均有高表达。本研究旨在探讨CD117和CD34在急性白血病中共表达的临床意义。方法:采用流式细胞术(flowcytometery,FCM)分别检测92例ALL和81例ANLL初诊患者骨髓单个核细胞(BMMNC)CD117的阳性率和阳性细胞水平;比较ALL和ANLL患者CD117/CD34共表达率的差异,并比较ALL患者中CD117和CD117/CD34共表达率的差异。设立20例健康成人为对照组。结果:在ALL和ANLL患者中CD117阳性率分别为15.2%和71.6%,CD117/CD34共表达率分别为5.4%和55.5%,差异有显著性(P<0.001)。ALL患者中CD117表达率和CD117/CD34共表达率分别为15.2%和5.4%,差异有显著性(P=0.029)。结论:CD117可作为急性白血病的MIC分型诊断之髓系免疫学标志,用以协助ANLL的临床诊断;较之CD117表达,CD117/CD34在ALL中的共表达率更低,可籍此协助排除ALL。

胃肠道间质瘤CD117、CD34、Ki-67的表达及其与临床病理因素和危险度的相关性

目的:探讨胃肠道间质瘤(gastrointestinal stromal tumor, GIST)CD117、CD34、Ki-67的表达及其与临床病理因素和危险度的关系.方法:应用免疫组化S-P法检测41例GIST组织中CD117、CD34和Ki-67的表达情况,对这些病例进行危险度分级,并分析上述免疫组化指标与临床病理相关因素(性别、年龄、发生部位、组织学分型)和危险度之间的关系.结果:CD117和CD34的阳性表达率分别为80.5%和73.2%,Ki-67增殖指数<1%、1%～5%和>5%的例数分别为22例、8例和11例;CD117、CD34和Ki-67在不同性别、年龄、组织学分型之间均没有显著性差异,但发生于食道和胃的GIST的CD34阳性表达率高于发生于肠道的,而Ki-67增殖指数则低于肠道(P<0.05);危险度极低度、低度、中度和高度的病例分别为6例、16例、7例和12例,CD117和CD34的阳性表达率在不同的危险度之间没有显著性差异,而Ki-67增殖指数在不同的危险度之间存在显著性差异(P<0.01).结论:CD117和CD34在GIST中呈高表达,对GIST的诊断具有一定的意义,但不能作为判断GIST危险度的指标;而Ki-67可能是判断GIST危险度和预测预后的可靠指标之一.

胃肠道间质瘤CD117、CD34、SMA、S-100蛋白、Vim、结蛋白的表达及临床意义

目的探讨胃肠道间质瘤(GISTs)的临床病理诊断,以及CD117、CD34、SMA、S-100蛋白、波形纤维蛋白(Vim)、结蛋白表达的临床意义。方法回顾分析了35例手术后经病理确诊的GISTs临床资料及辅助检查结果,免疫组化检测肿瘤组织CD117、CD34、SMA、S-100蛋白、Vim、结蛋白等抗原标志物的表达,分析对GISTs的诊断意义。结果35例GISTs发生于胃11例、小肠11例、腹腔5例。主要临床表现有腹胀、腹痛、消化道出血、腹部肿块。肿瘤组织中CD117、CD34的阳性表达率分别为94.3%和91.4%,显著高于SMA、S-100蛋白、Vim、结蛋白的表达(P<0.001),也显著高于在平滑肌瘤中的表达(P<0.0001);GISTs中结蛋白的阳性表达率2.9%,显著低于CD117和CD34(P<0.05);也显著低于在平滑肌瘤中的表达(P<0.001)。结论GISTs多发生于胃和小肠,胃肠镜、超声内镜和CT检查对间质瘤有较大诊断价值,而CD117阳性、CD34阳性及结蛋白结蛋白阴性对GISTs有确诊意义。

CD117在胃肠道间质瘤中表达的临床病理意义

目的:探讨CD117在胃肠道间质瘤(GIST)诊断及鉴别诊断中的应用价值。方法:应用:EnVision法检测91例GIST及72例对照肿瘤CD117、CD34、α-SMA、S-100等的表达状况。结果:CD117几乎表达于所有良、恶性、不同部位的GIST,总阳性率为96.7％,,平滑肌及神经源性肿瘤对照组CD117几乎均为阴性,CD34总阳性率72.5％,表达CD34的隆突性皮纤维肉瘤、上皮样肉瘤等CD117亦阴性。结论:CD117(克隆号sc168)作为GIST的辅助诊断指标具有极高的敏感性,与CD34合用,能辅助诊断绝大部分GIST,在胃肠道间叶源性肿瘤的鉴别诊断中有重要作用。

CD117、PDGFRA蛋白单独及联合DOG1检测在胃肠道间质瘤中的诊断价值

目的:探讨组织中CD117、PDGFRA两种蛋白表达在胃肠道间质瘤(gastrointestinal stromal tumors,GIST)中的诊断价值及联合DOG1蛋白检测的意义。方法:回顾性对99例GIST和25例非GIST肿瘤标本进行CD117、PDGFRA和DOG1蛋白表达进行检测并进行相关性分析。结果:GIST组CD117、PDGFRA和DOG1蛋白表达率分别为93.94%(93/99)、53.54%(53/99)和90.91%(90/99),非GIST组分别为4.00%(1/25)、4.00%(1/25)和12.00%(3/25),组间比较均有统计学意义(P<0.05);GIST组性别、年龄、肿瘤直径、肿瘤部位、组织学类型和危险度分级等临床病理参数与CD117、PDGFRA和DOG1蛋白表达无统计学意义(P>0.05);CD117、PDGFRA、DOG1、CD117和DOG1联合、PDGFRA和DOG1联合及三者联合判断GIST的敏感性分别为0.989、0.981、0.968、0.960、0.933和0.961,特异性分别为0.800、0.343、0.710、0.840、0.947和0.955,ROC曲线下面积(AUC)分别为0.945、0.748、0.895、0.895、0.840和0.975。结论:GIST中CD117、PDGFRA及DOG1蛋白表达在胃肠道间质瘤中的优势人群有待进一步研究;CD117、PDGFRA蛋白单独及联合DOG1检测可提高对GIST诊断的准确度。