体外循环手术前后病人血清sIL—2R水平和T淋巴细胞亚群,NK细胞的…

通过检测心脏体外循环手术前后病人血清中可溶性白介素２－受体、Ｔ细胞亚群、自然杀伤细胞，观察分析心脏ＣＰＢ手术病人细胞免疫的影响及其临床意义。选择：２４例风心病择期换瓣病人，术前，ＣＰＢ１０分钟、ＣＰＢ２小时，术后和１天、３天、５天检测血清ｓＩＬ－２Ｒ水平，Ｔ细胞亚群及ＮＫ细胞活性，术后第１天血清ｓＩＬ－２Ｒ水平升高，ＣＯ４（辅助细胞）活性明显降低，ＣＤ４／ＣＤ８（辅助细胞／抑制细胞）比值下降，ＮＫ     

原发性肝癌患者可溶性白细胞介素-2受体的变化及其临床意义

对３４例原发性肝癌（ＰＬＣ）患者外周血可溶性白细胞介素－２受体（ｓＩＬ－２Ｒ）、ＮＫ活性、Ｔ淋巴细胞亚群进行测定。结果：ＰＬＣ患者ｓＩＬ－２Ｒ水平明显高于健康对照组（Ｐ＜０．０１），ＮＫ活性、Ｔ淋巴细胞亚群ＣＤ３、ＣＤ４、ＣＤ４／ＣＤ比值均低于正常人（Ｐ＜０．０１），而ＣＤ８高于正常对照组（Ｐ＜０．０５）。Ⅱ、Ⅲ期ＰＬＣ患者ｓＩＬ－２Ｒ水平显著高于Ⅰ期患者（Ｐ＜０．０１）。ｓＩＬ－２Ｒ水平≥１０００ｕ／ｍｌ、５００～１０００ｕ／ｍｌ、＜５００ｕ／ｍｌ者６个月内的死亡率分别为８０．０％、２９．４％、０％。肝癌切除术后２周ｓＩＬ－２Ｒ水平较术前低（Ｐ＜０．０５），免疫治疗后４周ｓＩＬ－２Ｒ水平亦较治疗前低（Ｐ＜０．０５）。细胞免疫水平都有所改善。提示测定外周血ｓＩＬ－２Ｒ水平可作为ＰＬＣ的免疫状态、病情严重程度、疗效观察及预后估计的生物学指标。     

体外循环对风心病瓣膜替换病人细胞免疫功能的影响

对２５例风湿性心脏病（ＲＨＤ）换瓣病和５例先天性心脏病（ＣＨＤ）病人体外循环（ＣＰＢ）前后外周血自然杀伤细胞（ＮＫ）和抗体依赖细胞毒细胞（ＡＤＣＣ）活性、Ｔ细胞亚群、白细胞介素２（ＩＬ－２）和γ－干扰素（ＩＦＮ－γ）产生能力进行动态对照研究。结果表明：ＮＫ、ＡＤＣＣ活性、ＯＫＴ４细胞、ＩＬ－２和ＩＦＮ－γ产生能力于术后下降，以ＲＨＤ组中心功能Ⅲ级和双瓣替换为著。文中对上述指标下降原因及临床意义进行     

体外循环后甲状腺激素与细胞免疫变化的研究

为研究体外循环（ＣＰＢ）后甲状腺激素与细胞免疫的变化及其相互关系，测定２７例ＣＰＢ心脏手术病人术前、术后第２、７、１４天三碘甲状腺原氨酸（Ｔ３）、四碘甲状腺原氨酸（Ｔ４）、逆三碘甲状腺原氨酸（ｒＴ３）、促甲状腺素（ＴＳＨ）、可溶性白细胞介素２受体（ＳＩＬ－２Ｒ）及其中１２例白细胞介素－２（ＩＬ－２）的变化；另８例于ＣＰＢ后第２天外周血单核细胞（ＰＢＭＣ）培养液中加入不同浓度的Ｔ３，测定Ｔ３对ＩＬ－２产生的影响。结果显示ＣＰＢ后血清浓度Ｔ３降低，ｒＴ３增高，Ｔ４、ＴＳＨ正常，ＳＩＬ－２Ｒ含量增高，ＰＢＭＣ产生ＩＬ－２活性降低；Ｔ３可显著增强ＣＰＢ后ＩＬ－２活性。结论：ＣＰＢ后机体呈现低Ｔ３综合征和细胞免疫功能抑制，其中ＩＬ－２降低的机制中至少部分是通过Ｔ３降低所致     

卡介苗加白细胞介素2膀胱内灌注对外周血自然杀伤细胞,T淋？…

目的 观察膀胱肿瘤患者的细胞免疫状态及卡介苗（ＢＣＧ），白细胞介素（ＩＬ－２）联合膀胱腔灌注对其影响。方法 用＾３Ｈ－ＴｄＲ掺入法测定自然杀伤细胞（ＮＫ）活性，免疫荧光法测定Ｔ淋巴细胞亚群，ＢＣＧ，ＩＬ－２灌注前后动态观察，进行对比研究。结果 膀胱肿瘤病人外周血ＮＫ活性，Ｔ４细胞，Ｔ４／Ｔ８比值明显低于对照组，经ＢＣＧ，ＩＬ－２膀胱灌注治疗后，ＮＫ活性，Ｔ４细胞，Ｔ４／Ｔ８比值增高，ＮＫ活性，Ｔ４     

BCG－PSN、rIFN－r对膀胱癌患者T细胞MHCⅡ类抗原及IL－2R表达的诱导作用

采用鼠单克隆抗体间接免疫荧光技术观察了卡介苗多糖核酸（ＢＣＧ－ＰＳＮ）、重组免疫干扰素（ｒＩＦＮ－ｒ）在体外对膀胱癌患者外周静脉血Ｔ淋巴细胞主要组织相容性复合体（ＭＨＣ）Ⅱ类抗原及白细胞介素－２受体（ＩＬ－２Ｒ）表达的影响。结果表明；两者均能诱导病人Ｔ细胞ＤＲ抗原ＩＬ－２Ｒ的表达（Ｐ＜０．０５），而对正常人Ｔ细胞表达的影响无统计学意义。提示ＢＣＧ和ｒＩＦＮ－ｒ防治膀胱癌的作用可能与其诱导ＤＲ抗原、ＩＬ－２Ｒ的表达有关。     

肝癌患者免疫功能的临床研究

通过对１４例肝癌患者围术期ＮＫ细胞、Ｔ细胞亚群，单个核细胞ＩＬ－２Ｒ表达与体液免疫指标ＩｇＧ、ＩｇＡ、ＩｇＭ进行动态测定，结果发现肝癌患者ＮＫ细胞、ＣＤ３细胞、ＣＤ４细胞降低，ＣＤ４／ＣＤ８细胞比值降低，ＣＤ８细胞增高，ＩＬ－２Ｒ表达降低，Ｉｇ升高，后１０天ＮＫ细胞、ＣＤ４细胞、ＣＤ４／ＣＤ８细胞比值、ＩＬ－２Ｒ表达回升。术后３０天升至正常水平；Ｉｇ术后２０天降低，术后３０天至术前水平。结果表明手     

维持性血液透析病人NK－IL－2－IFNr系统的动态观察

本文检测了４０例维持性血液透析（ＭＨＤ）患者自然杀伤细胞（Ｎｋ）活性，并同时检测了患者外周血单个核细胞（ＰＢＭＣ）在植物血凝素（ＰＨＡ）刺激下白细胞介素２（ＩＬ－２）和免疫干扰素（ＩＦＮｒ）产生水平。结果发现ＭＨＤ患者ＮＫ活性、ＩＬ－２活性和ＩＦｖｒ水平均显著低于正常对照组（Ｐ＜０．０１）；单次血液透析后ＭＨＤ患者的ＮＫ活性、ＩＬ－２和ＩＦＮｒ诱生水平均有不同程度的升高；长期血液透析对ＮＫ活性、ＩＬ－２和ＩＦＶｒ诱生水平影响不大，正常对照ＮＫ活性与ＰＢＭＣ诱生ＩＬ－２和ＩＦＮｒ水平存在直线正相关，而ＭＨＤ患者相关性无显著意义，但透析后ＭＨＤ患者ＮＫ活性与ＩＬ－２活性相关性有显著意义。提示：ＭＮＤ淋巴细胞存在多方面功能受损，包括免疫调节环路的紊乱；血液透析能部分纠正这些免疫学异常；但长期血液透析无助于改善ＭＨＤ病人的免疫功能受损。     

原发性肝癌患者可溶性白细胞介素—2受体的变化及其临床意义

对３４例原发性肝癌患者外周血可溶性白细胞介素－２受体、ＮＫ活性、Ｔ淋巴亚群进行测定。结果；ＰＬＣ患者ｓＩＬ－２Ｒ水平明显高于健康对照组，ＮＫ活性、Ｔ淋巴细胞亚群ＣＤ３、ＣＤ４、ＣＤ４／ＣＤ８比值均低于正常人，而ＣＤ８高于正常对照组。Ⅱ、Ⅲ期ＰＬＣ患者ｓＩＬ－２Ｒ水平显著高于１期患者，ｓＩＬ－２Ｒ水平≥１０００ｕ／ｍｌ、５００￣１０００ｕ／ｍｌ、〈５００ｕ／ｍｌ者６个月内的死亡率分别为８０．０％、２     

结直肠癌患者手术前后血清sIL—2R和TNF水平的检测及临床意义

采用双抗体夹心ＥＬＩＳＡ法，对６９例结直肠癌（ＣＲＣ）患者手术前后血清可溶性白细胞介素－２受体（ｓＩＬ－２Ｒ）和肿瘤坏死因子（ＴＮＦ）水平进行了动态观察，结果表明：①结直肠癌患者血清ｓＩＬ－２Ｒ和ＴＮＦ水平均明显高于正常对照组（Ｐ〈０．０１）；②结直肠Ｄｕｋｅｓ分期Ｃ期和Ｄ期的ｓＩＬ－２Ｒ和ＴＮＦ水平均明显高于Ａ期和Ｂ期（Ｐ〈０．０５）；③结直肠癌患者手术后１个月；血清ｓＩＬ－２Ｒ和ＴＮＦ水平均显     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.     

活化性杀伤细胞免疫球蛋白样受体阳性的NK细胞对靶细胞的杀伤作用

Objective To study the killing effects of the killer cell immunoglobutin-like receptors (KIR) KIR2DS1-positive natural killer (NK) cells against acute, myeloid leukemia (AML) target cells, and to explore the KIR, human leucocyte antigen-Cw, and Cw loci (HLA-Cw) of NK cells, and, HLA-Cw of target cells mismatches destruction mechanism. Methods High-purified NK cells separated by DNYAL bead negative selection from healthy donor peripheral blood were taken as effector cells, and the freshly isolated bone marrow mononuclear cells from newly diagnosed AML patients as target cells. The anti-CD158a, CD158b monoclonal antibody was used to block inhibitory KLR receptors of NK cells (such as: KIR2DL1, KIR2DL2, KIR2DL3). The NK cells cytotoxicities against target cells before and after KIR blockades were detected by MTT reduction assay in vitro. Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques were used to detect HLA-Cw, KIR gene of the healthy donors and patients. NK cells and target cells were divided into group C1 (expressing HLA-Cw 01, 03, 07, 08, 12, 14, 16 alleles), C2 group (expressing HLA-Cw 02, 04, 05, 06, 15, 17, 18 alleles) and the C1/C2 group (co-expressing the alleles in C1 group and C2 group) based on HLA-Cw. Results The purity of NK cells analyzed by flow cytometry was (90.8±6.08)%, and the killing effects of NK cells were significantly enhanced after inhibitory KIR blockades (t=-3.00, P=0.005). The cell lysis in C1 group, KIR2DS1+ NK cells against C2 group target cells (57.37±1.40)% was significantly higher than that against C1 group (44.19±4.67) % and C1/C2 group (36.77±6.56)% target cells (F= 11.87, P = 0.021), furthermore the differences in cell lysis among the above three groups become more evident after the inhibitory KIR blockades (F = 18. 72, P=0. 009). Conclusions The activity of NK cells was increased after the inhibitory KIR blockades, and the killing activities of KIR2DS1+ NK cells were higher than KIR2DS1 NK cells. The incompatibility between KIR, HLA-Cw of NK cells and HLA-Cw of target cells mediated NK alloactivation, realizing "missing self" recognition, and enabling NK cells cytotoxieity against targets.