Immunopotentiality of Ayurvedic polyherbal formulations “Saribadi” and “Anantamul Salsa” with augmentation of IgM production and lymphocytes proliferation:A preliminary study

Objective:To assess the immunopotentiality of Ayurvedic polyherbal preparations,"Saribadi" and "Anantamul Salsa".Methods: Freshly prepared BALB/c mice splenocytes were cultured with "Saribadi" or"Anantamul Salsa" treatment [doses of 0.25%, 0.50%, 0.75%, 1.00%, 1.50%, 2.00%,3.00% and 4.00%(v/v)] at 37C for 5 days. The immunoglobulin M(IgM) production and lymphocytes proliferation were determined by ELISA and MTT methods, respectively.Endotoxin contamination was assessed by treating the preparations with polymyxin B.Results: The doses of "Saribadi" [0.25%, 0.50%, 0.75% and 1.00%(v/v)] significantly increased IgM productions(0.966, 0.728, 0.695 and 0.615 mg/m L vs. control 0.265 mg/m L)and lymphocytes proliferation [absorbance 0.311, 0.394, 0.372 and 0.334 optical density(OD) vs. control 0.162 OD]. Similarly, the doses of "Anantamul Salsa" [0.50%, 0.75%,1.00% and 1.50%(v/v)] promoted IgM productions(0.933, 0.919, 0.917 and 0.892 mg/m L vs. control 0.502 mg/m L) and the doses of "Anantamul Salsa" [0.50%, 0.75%, 1.00%,1.50%, 2.00%, and 3.00%(v/v)] stimulated lymphocytes proliferation(absorbance 0.395,0.326, 0.440, 0.398, 0.452 and 0.355 OD vs. control 0.199 OD). The activity of "Saribadi"and "Anantamul Salsa" was not retarded by the treatment of preparations with polymyxin B.Conclusions: Immunomodulatory activity of "Saribadi" and "Anantamul Salsa" was unveiled for the first time. "Saribadi" and "Anantamul Salsa" possess immunostimulating potential acting through the induction of lymphocyte proliferation and IgM production.These preparations may be useful in strengthening immune responses. However, further cellular and in vivo studies are required.

SPECIFIC UPTAKE OF MONOCLONAL ANTIBODY-CONJUGATED METHOTREXATE BY HUMAN LYMPHOCYTIC LEUKEMIC B CELLS

Objective: To analysis the uptake of free MTX and MTX conjugated to tumor specific monoclonal antibody by target and nontarget cells. Methods: The folate antagonist methotrexate (MTX) was conjugated to two monoclonal antibodies (Mab) directed against human chronic lymphocytic leukemia (CLL), Dal B01 and Dal B02, by an active ester method. Both conjugates were more cytotoxic toward the target tumor cell line D101 than to the nontarget cell line MOLT3, and Dal B02MTX conjugate was more inhibitory to D101 cells than free MTX in a 6 h pulse exposure assay. Results: Drug uptake studies revealed that D101 cells took up much more Dal B01 and Dal B02conjugated MTX than free MTX. The amounts of drug taken up by D101 cells incubated with Dal B01 and Dal B02conjugated MTX were always 3 to 5fold higher than that taken up by MOLT3 cells, although the latter took up more drug when incubated with free MTX. Furthermore, tumor cells incubated with Dal B01 or Dal B02conjugated MTX retained much larger amounts of drug for a prolonged period of time than those incubated with free MTX. Conclusion: The enhanced specific cytotoxicity of Dal B01 and Dal B02MTX conjugates toward target tumor cells is therefore likely due to (I) delivery of larger amounts of MTX to target cells when the drug is conjugated to Mab; (ii) longer retention of Mabconjugated MTX by target cells; and (iii) slow, prolonged release of MTX from the surfacebound or endocytosed conjugates, rendering them into a sustained release dosage form.

NK ACTIVITY OF LYMPHOCYTE SUBSETS AND THE EFFECTS OF LOW DOSE RADIATION

This work was supported by the National Natural Science Foundation of China (No. 3870902). Objective: To determine the NK activity of lymphocyte subsets and the effects of low dose radiation. Methods: Lymphocyte subsets were separated by monoclonal antibodies. The NK activity of each subset on tumor cells was detected by radioactive release method. Results: The results showed that besides NK cells, CD 4, CD 8 and B cells alone can kill tumor cells. But the cellkilling activity of NK cells appeared to be strongest. There was synergistic effect between CD 4 and NK cells. The activity of mixed lymphocytes was more than that of only one subset. The effect of low dose radiation (LDR) on NK activity of panlymphocytes or NK cells was different. Conclusion: This paper demonstrated that NK activity of mononuclear cells was called “NK activity of lymphocytes”, but it is not true. Only when NK cells were separated by monoclonal antibodies, its killer activity can be called “activity of NK cells”.

Study on immunological characteristics of T lymphocyte in peripheral blood from patients with sjogren's syndrome

Objective: To study on in immunological characteristics of T lymphocyte in peripheral blood from patients with Sjogren's syndrome (SS), provide the theory basis for the further research of Traditional Chinese medicine (TCM) targeted therapy.Methods:T lymphocyte subsets in peripheral blood from SS, RA and normal control groups were tested with various monocbnal antibodies and multicolor flow cytometry.T lymphocyte subsets were tested in peripheral blood from SS patients of different TCM Syndromes. The relationship between T Lymphocyte subsets and disease activity was measured by erythrocyte sedimentation rate (SR)and serum IgG. Results: The percentage of CD4^+T cells and the ration of CD4^+/CD8^+T cells in peripheral bbod from SS patients decreased significantly, and the percentage of CD8^+T cells increased than that in control groups (P<0.05). Compared with patients in inactive period, the percentage of CD4^+T cells in peripheral bLood from SS patients in the active stage increased (P>0.05), the percentage of CD8^+T cells decreased (P>0.05), and the ration of CD4^+/ CD8^+T cells increased (P<0.05).Compared with control groups, the percentage of CD69 expressed on T cells in peripheral blood from SS patients decreased, and the percentage of CD95's expression increased (P<0.05).The percentage of CD69CD95's expression also increased (P>0.05). There were no differences among CD4^+T cells, CD8^+T ceLs and CD4^+/ CD8^+ in peripheral blood from SS patients of different TCM Syndromes (P>0.05). CD69 and CD95's expression on SS patients of different TCM Syndromes was no significantLy different (P>0.05).T cell receptor Vβ(TCR Vβ) subfamilies gene in peripheral blood from SS patients and control groups were expressed in all. Compared witji control groups, Vβ 5.3,Vβ 13.1,Vβ 12,Vβ 7.2 had significant differences (P<0.05).Comparison of different TCM Syndromes in SS group: Vβ 13.1 and Vβ 14 were significantly different (P<0.05).Conclusion:There was dysimmunity on T lymphocyte subsets in peripheral blood of SS patients, which was related to disease activity;apoptosis after activation of autoreactive T cell may be induced by Chinese medicine;TCR Vβ subfamilies of different TCM syndromes were different, which noted that different autoreactive T cells of abnormal activation tended to result in different expression of TCM Different syndromes.

不同类型排斥反应受者血常规及外周血淋巴细胞亚群特征性变化

目的:排斥反应一直是限制移植肾存活的最重要因素。移植肾病理活检是排斥反应诊断的金标准,但因其局限性并不能作为常规监测手段。近来,外周血淋巴细胞亚群检测已成为评估机体免疫系统的重要手段,然而其在肾移植领域的应用价值和策略有待探究;此外,常规检验参数的新开发利用也是探索肾移植疾病诊断策略和预测模型的重要手段。本研究旨在结合血常规,探究外周血淋巴细胞亚群与T细胞介导的排斥反应(T cell-mediated rejection,TCMR)和抗体介导的排斥反应(antibody-mediated rejection,ABMR)的相关性及其协助诊断价值。方法:回顾性分析2021年1至12月就诊于中南大学湘雅二医院且符合纳入标准的154例肾移植受者的基本资料以及临床资料。根据排斥反应是否发生及其类型分为稳定组、TCMR组和ABMR组。比较3组的基本资料,并将TCMR组和ABMR组排斥反应治疗前的移植肾功能、血常规和外周血淋巴细胞亚群数据与稳定组进行比较。结果:稳定组、TCMR组和ABMR组在免疫抑制维持方案、移植肾来源等方面差异均无统计学意义(均P>0.05),但ABMR组的肾移植术后时间显著长于稳定组(P<0.001)和TCMR组(P<0.05)。在移植肾功能方面,ABMR组的血肌酐值均高于稳定组和TCMR组(均P<0.01),并且TCMR组也高于稳定组(P<0.01);TCMR组和ABMR组的尿素氮均显著高于稳定组(均P<0.01),而TCMR组和ABMR组之间差异无统计学意义(P>0.05);TCMR组和ABMR组的估算肾小球滤过率(estimated glomerular filtration rate,eGFR)均低于稳定组(均P<0.01)。在血常规方面:ABMR组的血红蛋白、红细胞数和血小板数均低于稳定组(均P<0.05);TCMR组的中性粒细胞比例和数量均高于稳定组(均P<0.05),ABMR组的中性粒细胞比例高于稳定组(P<0.05);TCMR组的嗜酸性粒细胞比例和数量均低于稳定组和ABMR组(均P<0.05);TCMR组和ABMR组的嗜碱性粒细胞比例和数量、淋巴细胞比例和数量均低于稳定组(均P<0.05);稳定组、TCMR组和ABMR组的单核细胞比例和数量差异均无统计学意义(均P>0.05)。在淋巴细胞亚群方面:TCMR组和ABMR组的CD45+细胞和T细胞数均低于稳定组(均P<0.05);TCMR组的CD4+T细胞数、NK细胞数和B细胞数均低于稳定组(均P<0.05);稳定组、TCMR组和ABMR组在T细胞比例、CD4+T细胞比例、CD8+T细胞比例和数量、CD4+/CD8+T细胞比值、NK细胞比例、B细胞比例方面差异均无统计学意义(均P>0.05)。结论:排斥反应的发生导致移植肾功能受损,同时会伴有肾移植受者血常规、外周血淋巴细胞亚群部分指标的特征性变化。TCMR和ABMR发生时血常规、外周血淋巴细胞亚群部分指标改变特点的不同可能有助于预测和诊断排斥反应以及二者的鉴别。

免疫检查点LAG-3及其靶向药物研究现状和临床应用进展

淋巴细胞激活基因3(lymphocyte-activation gene 3,LAG-3)是一种抑制性免疫检查点受体,能负向调控T细胞的功能,避免免疫系统过度激活损伤机体。当肿瘤和慢性感染存在时,持续的抗原刺激诱导效应T细胞的LAG-3表达上调进而导致T细胞功能耗竭和肿瘤免疫逃逸。靶向LAG-3药物通过特异性阻断LAG-3的信号通路,能重新激活T细胞的抗肿瘤功能,在多种实体瘤、血液系统肿瘤及自身免疫性疾病中均有很好的疗效。本文总结了当前关于LAG-3的结构,配体和调控功能机制的研究进展,对当前的靶向LAG-3药物临床试验现状进行综述,讨论了LAG-3靶向药物的临床应用策略和发展方向,以期为进一步深入研究LAG-3提供参考。

抗核抗体联合T淋巴细胞亚群检测对复发性流产妊娠结局的预测价值

目的:探究抗核抗体(ANA)联合T淋巴细胞亚群检测对复发性流产(RSA)妊娠结局的预测价值。方法:选择2020年2月—2022年7月赣州市妇幼保健院收治的50例RSA患者入研究组,另选择50例同期于本院行产前检查的正常妊娠孕妇入对照组。采集所有参检者清晨空腹肘静脉血5 mL,检测ANA、T淋巴细胞亚群(CD4^(+)、CD8^(+)、CD16^(+)CD56^(+))水平,并计算CD4^(+)/CD8^(+)值。结果:研究组29例患者于孕10周前发生流产,流产率为58.00%(29/50);对照组于孕10周前发生流产共13例,流产率为26.00%(13/50),两组流产率对比,差异有统计学意义(χ^(2)=10.509,P=0.001)。相比于对照组,研究组ANA阳性检出率较高,CD4^(+)、CD16^(+)CD56^(+)、CD4^(+)/CD8^(+)水平均较高,CD8^(+)水平较低,差异均有统计学意义(P<0.05)。联合检测在RSA中的预测价值最高,AUC为0.872,敏感度为0.875,特异度为0.393,其次为CD16^(+)CD56^(+)、CD4^(+)、CD4^(+)/CD8^(+)、CD8^(+)、ANA。结论:ANA联合T淋巴细胞亚群检测在RSA诊断中应用价值较高,能够有效预测RSA发生风险,为临床尽早干预提供可靠的参考。

NLR、PLR、LMR、MPR及CMV-IgM联合检测在诊断婴幼儿巨细胞病毒感染中的临床意义

目的:探讨中性粒细胞与淋巴细胞比值(NLR)、血小板与淋巴细胞比值(PLR)、淋巴细胞与单核细胞比值(LMR)、平均血小板体积与血小板计数比值(MRP)及巨细胞病毒特异抗体(CMV-IgM)联合检测在诊断婴幼儿巨细胞病毒(CMV)感染中的临床价值。方法:选取150例我院2020年1月-2022年12月收治的CMV感染婴幼儿作为观察组,另选取同期健康婴幼儿60例作为对照组。所有婴幼儿均采血做血常规检测,获得NLR、PLR、LMR、MPR,并检测血清CMV-IgM。比较两组NLR、PLR、LMR、MPR及CMV-IgM水平差异;绘制ROC曲线,分析NLR、PLR、LMR、MPR及CMV-IgM联合检测识别婴幼儿CMV感染的临床价值。结果:观察组血清NLR、PLR、LMR水平为(0.29±0.05)、(45.41±4.12)、(7.85±1.24),低于对照组的(0.55±0.11)、(69.87±6.12)、(5.14±1.02),MPR及CMV-IgM水平为(0.41±0.12)、(23.65±2.42)AU/mL,高于对照组的(0.22±0.05)、(10.22±1.23)AU/mL,差异有统计学意义(P<0.05);绘制ROC曲线显示,血清NLR、PLR、LMR、MPR、CMV-IgM及联合检测诊断婴幼儿CMV感染的曲线下面积分别为:0.802、0.763、0.786、0.799、0.850、0.950。结论:NLR、PLR、LMR、MPR及CMV-IgM联合检测在婴幼儿CMV诊断中价值高,可提高诊断灵敏度、特异度,可减少漏诊、误诊风险,便于早期开展治疗工作,保障患儿健康成长。

Preparation and Characterization for Bispecific Antibodies of Anti-CD3×Anti-Idiotype to BCellLym phocytic Leukem ia

Bispecific antibodies (BsAbs) of anti CD3×anti idiotype (Id) to B cell lymphocytic leukemia (CLL) were prepared by chemical conjugation and direct hybridization technique of hybridoma and hybridoma without screening markers. The specificity of BsAbs from culture supernatants or ascites was assayed by indirect ELISA and indirect immunoflurescence (IF). The results showed that BsAbs could specifically react with homologous serum IgM from patients with B CLL and cells carrying CD3 marker respectively. Cell combination test and LDH assay demonstrated that BsAb significantly increased the conjugate formation between lymphocyte activated kill (LAK) cells and Daudi cells, and enhanced the cytotoxic activity of LAK cells against Daudi cells.

ANALYSIS ON EPITOPES OF IGM WITH MONOCLONAL ANTI-ISOTYPIC AND ANTI-IDIOTYPIC ANTIBODIES AGAINST IgM FROM B-CLL

A double antibodies additivity ELISA test was employed to identify the epltopes which can be recognized by monoclonal antibodies (McAbs) against IgM from B chronic lymphocyte leukemia (B-CLL). The computer grouping programme analysis showed that 4 and- isotypic MaAbs could be divided into two groups and 10 anti- idiotype McAbs could be divided into four groups. The result was consistent with that of the indirect sandwich ELISA and inhibition ELISA test. It suggested that there were at least 6 distinct IgM epitopes which can react specifically with 14 McAbs. Our study indicated that the combination of the additivity ELISA test and the computer grouping programme analysis is of help in studying the relationship of the structure and function of antigen.

免疫性血小板减少症患儿 T淋巴细胞亚群、甲状腺自身抗体、微小RNA-106b-5p 和微小RNA-181a-5p表达水平检测及临床意义

目的:分析免疫性血小板减少症(ITP)患儿T淋巴细胞亚群、甲状腺自身抗体、微小RNA-106b-5p(miR-106b-5p)和微小RNA-181a-5p(miR-181a-5p)表达水平及临床意义。方法:以158例ITP患儿为ITP组,依据临床分型不同分为慢性ITP组(34例)、持续性ITP组(60例)和新诊断ITP组(64例)。另选取同期健康儿童102例为对照组。所有患儿均给予静脉滴注人免疫球蛋白及口服醋酸泼尼松片等常规治疗,均治疗5 d。比较ITP组与对照组全血T淋巴细胞亚群(CD3^(+)、CD4^(+)、CD8^(+))细胞及血清甲状腺自身抗体[甲状腺球蛋白抗体(TGAb)、甲状腺过氧化物酶抗体(TPOAb)]、miR-106b-5p、miR-181a-5p水平。比较慢性ITP组、持续性ITP组和新诊断ITP组患儿全血T淋巴细胞亚群及血清TGAb、TPOAb、miR-106b-5p、miR-181a-5p水平。比较ITP患儿治疗前、治疗5 d后全血T淋巴细胞亚群及血清TGAb、TPOAb、miR-106b-5p、miR-181a-5p水平。结果:与对照组比较,ITP组全血CD3^(+)、CD4^(+)细胞及血清miR-181a-5p水平更低,全血CD8^(+)细胞及血清TGAb、TPOAb、miR-106b-5p水平更高(均P<0.05)。慢性ITP组全血CD3^(+)、CD4^(+)细胞及血清miR-181a-5p水平低于持续性ITP组和新诊断ITP组,全血CD8^(+)细胞及血清TGAb、TPOAb、miR-106b-5p水平高于持续性ITP组和新诊断ITP组(均P<0.05)。与治疗前比较,治疗5 d后ITP患儿全血CD3^(+)、CD4^(+)细胞及血清miR-181a-5p水平升高,全血CD8^(+)细胞及血清TGAb、TPOAb、miR-106b-5p水平降低(均P<0.05)。结论:ITP患儿存在T淋巴细胞亚群失衡、甲状腺自身抗体和miR-106b-5p高表达以及miR-181a-5p低表达情况。治疗期间积极检测患儿全血T淋巴细胞亚群及血清甲状腺自身抗体、miR-106b-5p、miR-181a-5p水平,有助于患儿的疗效评估。

不同预后疗效的特发性膜性肾病外周血淋巴细胞亚群变化的临床分析

目的:回顾性分析治疗前后特发性膜性肾病(IMN)患者的淋巴细胞亚群计数,初步探索不同淋巴细胞亚群在IMN患者的临床疗效和预后判断中可能的作用。方法:收集我院2019年01月-2022年03月经肾穿刺或者血清学抗磷脂酶A2受体抗体(sPLA2R-Ab)阳性诊断为IMN患者的临床资料,根据患者随访末期有无达到临床缓解,分为缓解组和未缓解组,比较两组之间基线临床指标以及随访前后淋巴细胞亚群计数的差异。并根据患者sPLA2R-Ab是否阳性分别比较淋巴细胞亚群差异。结果:两组患者基线期在性别、年龄、尿蛋白定量、血肌酐、血白蛋白水平等差异均无统计学意义(P>0.05);与缓解组相比,未缓解组表现更高的外周血CD_(4)^(+)淋巴细胞计数及CD_(4)^(+)/CD+8比值,且这种表现在随访末依旧存在(P<0.05)。根据基线sPLA2R-Ab是否阳性进行分组分析发现,两组CD_(4)^(+)计数未缓解组较缓解组均明显升高,差异具有统计学意义(P<0.05)。结论:初步临床观察表明,IMN患者外周血CD_(4)^(+)计数及CD_(4)^(+)/CD+8比值升高,提示这类患者的疗效可能不佳,详细机制有待进一步研究。

Effect of panel reactive antibodies on T cell immunity reinstatement following renal transplantation

BACKGROUND Chronic kidney disease is associated with immunological disorders,presented as phenotypic alterations of T lymphocytes.These changes are expected to be restored after a successful renal transplantation;however,additional parameters may contribute to this process.AIM To evaluate the impact of positive panel reactive antibodies(PRAs)on the restoration of T cell phenotype,after renal transplantation.METHODS CD4CD28null,CD8CD28null,natural killer cells(NKs),and regulatory T cells(Tregs)were estimated by flow cytometry at T0,T3,and T6 which were the time of transplantation,and 3-and 6-mo follow-up,respectively.Changes were estimated regarding the presence or absence of PRAs.RESULTS Patients were classified in two groups:PRA(-)(n=43)and PRA(+)(n=28)groups.Lymphocyte and their subtypes were similar between the two groups at T0,whereas their percentage was increased at T3 in PRA(-)compared to PRA(+)[23(10.9-47.9)vs 16.4(7.5-36.8)μ/L,respectively;P=0.03].Lymphocyte changes in PRA(-)patients included a significant increase in CD4 cells(P<0.0001),CD8 cells(P<0.0001),and Tregs(P<0.0001),and a reduction of NKs(P<0.0001).PRA(+)patients showed an increase in CD4(P=0.008)and CD8(P=0.0001),and a reduction in NKs(P=0.07).CD4CD28null and CD8CD28null cells,although initially reduced in both groups,were stabilized thereafter.CONCLUSION Our study described important differences in the immune response between PRA(+)and PRA(-)patients with changes in lymphocytes and lymphocyte subpopulations.PRA(+)patients seemed to have a worse immune profile after 6 mo follow-up,regardless of renal function.

Chinese and Western medicine treatment of blocking antibody in recurrent spontaneous abortion

The causes of recurrent spontaneous abortion are complex traditional Chinese medicine holds that its etiology is losses of spleen and kidney qi, qi and xue deficiency, in addition to secretion, genetic, anatomical, infection, systemic diseases, environmental factors and other related immune factors, the deficiency of blocking antibody is also one of the reasons for the lack of immune factors. In treating it, Chinese medicine treatment combines the patients personal constitution and treatment based on syndrome differentiation; Western medicine treatment mainly applies Aspirin, active immune lymphocyte treatment, low molecular heparin, gamma globulin protein passive immune treatment and psychological intervention therapy. In this paper, a review of the treatment methods for closed antibodies in the past 5 years is made.

复发性流产患者淋巴细胞免疫治疗的研究进展

复发性流产(recurrent spontaneous abortion,RSA)的发病率日益增加,已经成为当前困扰育龄期夫妻的严重问题。RSA的已知病因有染色体异常、宫腔疾病、内分泌异常和感染性因素等,但仍有50%的RSA病因不明,其中绝大多数与免疫因素有关,具体机制不明。目前已有免疫治疗,如淋巴细胞免疫治疗(lymphocytes immunotherapy,LIT),运用于封闭抗体阴性的患者,由于该治疗方法尚无统一的标准,故有些研究结果大相径庭,使得该治疗方法未能广泛推及。综述LIT的方法,拟为RSA的临床诊治提供依据,以期提高RSA患者的妊娠成功率。

炎症性肠病抗体药物研究进展

肠道作为一个重要的消化器官和免疫器官,其免疫功能紊乱是炎症性肠病(IBD)的重要病理特征。对IBD免疫病理的深入了解促进了其靶向治疗的发展,现已研发了针对不同靶点的抗体生物制剂,改变了IBD的治疗模式,本文将综述抗体生物制剂在IBD中的研究进展。

基于靶点人源化小鼠的PD-1/CTLA-4双特异性抗体及其IgG1亚型的抗癌活性评价

目的:构建基于靶点人源化小鼠的程序性死亡受体-1(PD-1)/细胞毒性T淋巴细胞抗原-4(CTLA-4)双特异性抗体(BsAb)并对BsAb及其IgG1亚型进行抗癌活性评价和探讨其潜在的作用机制。方法:构建和扩增并纯化不同结构及抗体亚型的PD-1/CTLA-4抗体BsAb1、BsAb2和BsAb3,对纯化BsAb进行靶点亲和力检测,采用荧光素酶报告基因实验和FCM检测抗体的生物学活性。基于B-hPD-1-hPD-L1-h CTLA-4人源化小鼠的MC38-hPD-L1结肠癌细胞移植瘤模型对BsAb进行体内药效评估,并通过移植瘤组织中肿瘤浸润淋巴细胞(TIL)分析PD-1/CTLA-4抗体的作用机制。结果:成功制备的BsAb1、BsAb2及BsAb3对靶点PD-1和CTLA-4均有较强的特异性亲和力、对靶点通路均有不同程度的阻滞活性,均明显抑制移植瘤的生长(P<0.05或P<0.01)。IgG1亚型BsAb体内药效更优(P<0.01),TIL分析发现BsAb2-IgG1明显增加了CTL百分率(P<0.05),显著降低了肿瘤浸润Treg细胞百分率(P<0.01),使肿瘤免疫微环境更有利于杀伤肿瘤细胞;增强ADCC活性的Fc突变体亚型BsAb2-SI则不能进一步提高抗肿瘤活性。结论:具有Fc效应功能的IgG1亚型的PD-1/CTLA-4抗体体内抗癌药效更优,因其可以更好地清除TIL中的Treg细胞。

异型淋巴细胞比例联合EB病毒抗体及核酸检测在儿童传染性单核细胞增多症辅助诊断中的应用价值

目的研究异型淋巴细胞比例联合EB病毒抗体及核酸检测在儿童传染性单核细胞增多症辅助诊断中的应用价值。方法收集2022年1—12月在平邑县人民医院就诊的37例传染性单核细胞增多症患儿的临床资料。所有患儿均进行异型淋巴细胞比例、EB病毒抗体(VCA-IgM)和EB病毒核酸(EBV-DNA)检测,记录并分析患儿的诊断结果,计算不同检测方法单独与联合应用的诊断效能。结果异型淋巴细胞比例为(16.22±3.47)%,阳性率为62.16%,VCA-IgM和EBV-DNA的阳性率分别为83.78%、91.89%;异型淋巴细胞比例检测、VCA-IgM检测和EBV-DNA检测联合应用的敏感度和准确度均高于各指标单独应用(敏感度:97.30%比43.24%、70.27%、83.78%,准确度:99.44%比84.44%、91.11%、95.00%,均P<0.05),特异度、阳性预测值与阴性预测值均明显高于异型淋巴细胞比例检测和VCA-IgM抗体检测(特异度:100.00%比95.10%、96.50%,阳性预测值:100.00%比69.57%、83.87%,阴性预测值:99.31%比86.62%、92.62%,均P<0.05)。结论异型淋巴细胞比例、VCA-IgM和EBV-DNA三项检测联合应用对于辅助诊断儿童传染性单核细胞增多症具有较高的价值。

B淋巴细胞在HBV感染中的多重作用

乙型肝炎病毒(HBV)的致病性是宿主免疫与病毒作用的结果,慢性乙型病毒性肝炎的功能性治愈表现在HBV表面抗原(HBsAg)的出现,合成并分泌抗体是B淋巴细胞的重要作用之一。慢性乙型肝炎(CHB)患者中naive B细胞数量增加,活化增强,但HBV特异性抗体产生下降;经过刺激活化的B淋巴细胞可作为抗原提呈细胞并且可诱导HBV特异性细胞毒性T淋巴细胞(CTL);在CHB患者体内发现了一类产白介素-10(IL-10)的细胞称为Breg,这类B淋巴细胞可抑制CHB患者体内的炎症反应促进HBV感染持续。本文将对HBV感染中的B淋巴细胞作用进行综述。

PLR在抗核抗体阳性强直性脊柱炎患者中的临床价值

目的探讨血小板/淋巴细胞比值(PLR)在合并抗核抗体(ANA)阳性强直性脊柱炎(AS)患者中的临床价值。方法选取2018年1月—2021年11月徐州医科大学附属医院AS患者132例(AS组),其中ANA阳性39例、ANA阴性93例。以同期健康体检者98名作为正常对照组。比较2个组一般临床资料的差异。采用Spearman相关分析评价AS组各项指标之间的相关性。采用多因素Logistic回归分析探讨AS患者ANA阳性的危险因素。采用受试者工作特征(ROC)曲线评价相关指标对AS合并ANA阳性的风险预测价值。比较ANA阳性和阴性患者阿达木单抗治疗后相关指标的差异。结果AS组与正常对照组淋巴细胞计数、血小板计数、单核细胞计数、红细胞分布宽度(RDW)、PLR、单核细胞/淋巴细胞比值(MLR)、中性粒细胞/淋巴细胞比值(NLR)、免疫球蛋白(Ig)G、IgA、IgM差异均有统计学意义(P<0.05)。AS患者RDW与红细胞沉降率(ESR)呈正相关(r=0.189,P=0.034),PLR、MLR、NLR与ESR、C反应蛋白(CRP)均呈正相关(P<0.05)。平均血小板体积(MPV)与ESR、CRP呈负相关(r值分别为-0.382、-0.385,P<0.001)。ANA阳性和阴性患者年龄、ESR、CRP、PLR、IgG、淋巴细胞计数、病程差异有统计学意义(P<0.05)。ANA阳性AS患者PLR与ESR、CRP呈正相关(r值分别为0.579、0.691,P<0.001)。PLR、病程是AS患者合并ANA阳性的独立危险因素(P<0.05)。阿达木单抗治疗后,ANA阳性和阴性患者RDW、PLR、ESR、CRP差异均有统计学意义(P<0.05)。结论AS合并ANA阳性患者炎症因子水平较高,治疗效果差。PLR在ANA阳性AS患者中具有一定的临床指导意义。