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。

骨髓瘤细胞表面CD117表达与复发难治性多发性骨髓瘤的相关性分析

目的探究骨髓瘤细胞表面CD117表达与复发难治性多发性骨髓瘤的相关性。方法回顾性研究初次治疗的250例多发性骨髓瘤患者,根据患者治疗疗效和复发情况,将患者分为复发难治组和非复发难治组。比较两组间的骨髓瘤细胞CD117表达和临床资料特征的差异,同时采用二元logistic回归模型多因素分析患者复发难治的影响因素。结果两组在性别、M蛋白类型、血小板、白细胞、乳酸和浆细胞比例比较中,差异均无统计学意义(χ^(2)分别=0.10、0.85,t分别=0.10、0.79、0.03、1.31,P均>0.05);与非复发难治组比较,复发难治组骨髓瘤细胞CD117表达阴性比例较高、年龄较大、DS分期较晚、血色素较低、肌酐较高、β微球蛋白较高、白蛋白较低、血钙较高和C-反应蛋白(C反应蛋白)阳性率较高,差异均有统计学意义(χ^(2)分别=26.15、19.21、13.14、7.54、4.76、6.44、5.90、7.14、6.04,P均<0.05)。二元logistic回归结果显示,骨髓瘤细胞CD117表达阳性是复发难治的保护因素,年龄大、DS分期晚和C反应蛋白阳性是复发难治的危险因素(HR分别=0.13、3.47、1.79、2.10,P均<0.05)。结论骨髓瘤细胞CD117表达阳性可能是复发难治性的多发性骨髓瘤患者保护因素。

CD34、CD117、BCL-2和Ki67免疫组化联合在乳腺叶状肿瘤诊断及预后判断中的应用

目的 分析并讨论CD34、CD117、BCL-2、Ki67免疫组化联合应用在乳腺叶状肿瘤诊断及预后判断中的价值。方法 回顾广东省妇幼保健院病理科2018年10月至2021年10月诊断的乳腺叶状肿瘤标本50份,依据《乳腺肿瘤(WHO肿瘤分类系列第五版)》中关于乳腺良性、交界性和恶性叶状肿瘤的组织学特征的最新诊断标准将叶状肿瘤分为良性(n=26)、交界性(n=16)和恶性(n=8),加做免疫组化CD34、CD117、BCL-2、Ki67,并对患者进行随访,分析上述免疫组化表达情况及其与预后的相关性。结果 在乳腺良性、交界性、恶性叶状肿瘤间质细胞中,CD34弥漫表达的阳性率分别为73.08%、6.25%、0.00%,部分表达的阳性率分别为26.92%、87.50%、12.50%,差异有统计学意义(χ^(2)=55.951,P<0.001);CD117弥漫表达的阳性率分别为0.00%、0.00%、12.50%,部分表达的阳性率分别为0.00%、50.00%、62.50%,差异有统计学意义(χ^(2)=26.022,P<0.001);BCL2弥漫表达的阳性率分别为88.46%、25.00%、37.50%,部分表达的阳性率分别为11.54%、75.00%、37.50%,差异有统计学意义(χ^(2)=29.044,P<0.001);Ki67≥30%且<60%的阳性率分别为0.00%、75.00%、12.50%,Ki67≥60%的阳性率分别为0.00%、0.00%、87.50%,差异有统计学意义(χ^(2)=73.853,P<0.001)。良性叶状肿瘤的复发率为0.00%(0/26),交界性叶状肿瘤的复发率为6.25%(1/16),恶性叶状肿瘤的复发率为12.50%(1/8)。Pearson相关性分析结果显示:叶状肿瘤中Ki-67的表达与复发率呈正相关(r=0.871,P=0.032),CD34、BCL2的表达与复发率均呈负相关(r=-1.000,P<0.001;r=-1.000,P<0.001),CD117的表达与复发率不相关(r=0.723,P=0.482)。结论 CD34、CD117、BCL-2、Ki67免疫组化联合应用在乳腺叶状肿瘤诊断及预后判断中具有一定的价值,尤其对于微创手术标本或穿刺标本,可以指导临床诊治。

多发性骨髓瘤浆细胞CD117/CD200表达模式与分子遗传学预后参数的相关性研究

目的:探讨多发性骨髓瘤(MM)患者浆细胞CD117和CD200的表达与分子遗传学异常的相关性。方法:选取初诊MM患者100例,采集患者新鲜骨髓液,利用流式细胞术(FCM)和荧光原位杂交(FISH)技术检测浆细胞免疫表型和染色体结构变异。结果:CD117和CD200在所有MM患者异常浆细胞中的阳性表达率均为44.0%(44/100),75例行FISH检测的患者中有53例至少检出1种分子遗传学异常,总检出率为70.7%(53/75),1q21(CKS1B)基因复制、1p32(CDKN2C)基因缺失、p53基因缺失、IgH重排检出率分别为48.6%(36/74)、10.6%(7/66)、11.1%(8/72)、32.9%(24/73)。CD117^(+)患者IgH重排发生率明显低于CD117^(-)患者(P<0.05),CD200^(-)患者1p32(CDKN2C)基因缺失比例明显低于CD200^(+)患者(P<0.05)。根据CD117及CD200的表达,将患者分成4组(CD117^(+)CD200^(+)、CD117^(+)CD200^(-)、CD117^(-)CD200^(+)、CD117^(-)CD200^(-)),进一步分析发现CD117^(+)CD200^(-)组IgH重排发生率明显低于CD117^(-)CD200^(+)组(P<0.05),CD117^(+)CD200^(-)组1p32(CDKN2C)基因缺失率明显低于CD117^(+)CD200^(+)组和CD117^(-)CD200^(+)组(P<0.05)。结论:CD117联合CD200表达模式的不同对MM患者的预后判断有重要价值,肿瘤细胞具有CD117^(-)CD200^(+)表达模式的MM患者预后更差。

CD34、CD117和Ki67在老年胃肠道间质瘤中的表达及临床意义

目的探讨CD34、CD117和Ki67在老年胃肠道间质瘤(GIST)中的表达及临床意义。方法收集经手术切除的GIST组织标本及瘤旁组织71例,采用免疫组化法测定CD34、CD117和Ki67蛋白表达。比较GIST组织与瘤旁组织CD34、CD117和Ki67蛋白阳性表达;比较不同危险度分级CD34、CD117和Ki67蛋白阳性表达情况;比较不同病理特征CD34、CD117和Ki67蛋白阳性表达。结果GIST组织CD34、CD117、Ki67蛋白阳性率显著高于瘤旁组织(P<0.05)。危险度分级越高,CD34、CD117和Ki67蛋白阳性表达越多(P<0.05)。不同性别、不同肿瘤部位、不同肿瘤组织类型、不同肿瘤直径、不同肿瘤数目CD34、CD117和Ki67蛋白阳性表达无显著差异(均P>0.05);周围浸润CD34、CD117和Ki67蛋白阳性表达显著高于无周围浸润(P<0.05);肿瘤血管CD34、CD117和Ki67蛋白阳性表达显著高于无肿瘤血管(P<0.05)。结论CD34、CD117和Ki67在老年GIST中高表达,且与危险度分级、周围浸润和肿瘤血管密切相关。

伴CD5、CD117阳性以及TdT阴性的纵隔B3型胸腺瘤1例

患者女性,54岁。因间断性右肩背部疼痛1个月,发现纵隔肿物近1个月入院。患者1个月前无明显诱因出现右肩背部疼痛,休息后可缓解,无四肢无力,无眼睑下垂和视物成双。增强CT示右前纵隔可见团块状软组织密度影,密度不均,内可见斑片状低密度影,不均匀强化,肿块大小5.2 cm×4.4 cm×4.7 cm,边界欠清。临床遂行正中胸骨劈开纵隔肿物切除+胸腺切除+前纵隔淋巴结清扫,术中探查:纵隔胸腺右叶可见一形态不规则肿物,大小5.5 cm×5.0 cm×4.5 cm,侵及右侧胸膜,与上腔静脉及无名静脉关系紧密,质硬,活动差。术后标本送病理检查。