Wu69-小鼠抗人白细胞介素2受体的单抗

本文报导应用杂交瘤技术制备的鼠抗人白细胞介素2受体(IL—2R)的单抗—Wu69.免疫沉淀表明它能识别分子量为56Kd的PHA活化的T细胞膜表面的蛋白分子。该抗体只对部分B细胞及非淋巴样生血细胞系呈阳性反应,而白血病T细胞系均为阴性,但对活化的T细胞及人T细胞克隆有高度的结合力。它可抑制T细胞的同种异体刺激所引起的增殖反应,并与IL—2有竞争作用。进一步应用FACS及顺序免疫沉淀试验证明它与抗Tac完全相同。 本文还对抗IL-2R的重要性及抗IL—2R作为免疫抑制剂的可喜前景进行了讨论。     

白细胞介素－15

白细胞介素－１５（ＩＬ－１５）是新近发现的一种细胞因子，可由多种细胞产生，其中主要是巨噬细胞。作用对象是Ｔ细胞、Ｂ细胞、ＮＫ细胞和一些非淋巴细胞。ＩＬ－１５７ｄ以和ＩＬ－２Ｒ的Ｂ和Ｙ链相结合并通过它们进行信号传导。目前所知ＩＬ－１５的生物学活性大致与ＩＬ－２相似。     

白细胞介素1和2测定方法的某些改进

本文对IL—1及IL—2检测的方法学进行了探讨,首先证明诱发小鼠脾细胞增殖的最佳ConA量,并不是诱导IL—2产生的最佳剂量。前者为7μg/ml而后者为3μg/ml:而在制备IL—1检测用的胸腺细胞时,对ConA剂量的选择则以亚适量(3μg/ml)为佳,剂量过小(1μg/ml)胸腺细胞对IL—1反应性极低。进一步研究发现,IL—1产生细胞的冻融或加入消炎痛可促进IL—1的释放和产生:而红细胞对IL—2的产生则有明显抑制作用。最后对不同品系小鼠的测定结果进行了比较。     

不同行为类型者血液流变学测定

不同行为类型者血液流变学测定齐齐哈尔市商业职工医院内科汪小川，关宇宏本文对Ａ型行为者和Ｂ型行为者的中年男性进行了血流变学的指标测查。现将结果报告如下。对象与方法对象：（１）Ａ型行为组共４８名，均为身体健康的中年男性，平均年龄４１．２±２．４岁、（２）...     

考试应激中唾液皮质醇及SIgA变化与行为类型研究

本文对５７名福州某校高二年级男生，年龄１７－１９岁，身体健康，无口腔疾病及免疫系统疾病家族史，且参加为期三天的期末考试者，采用定式问卷、统一指导语和集体测验的办法，完成一般情况调查表和Ａ型行为问卷；Ａ型行为问卷共６０题，由张伯源修订，分为争强好胜、敌...     

人白细胞介素2受体α链基因第三内含子的克隆与核苷酸序列分析

应用ＰＣＲ技术扩增了人白细胞介素２受体α基因第三内含子２．５ｋｂ片段，并成功地克隆到ｐＢＳ－ＳＫ载体中，构建了一系列亚克隆并测定了２．５ｋｂ全核苷酸序列，其中２２２８ｂｐ碱基序列为国内外首次测定，其数据已被ＧｅｎＢａｎｋ接受，接受号为Ｕ５６３８９。     

人白细胞介素2受体α链cDNA导入哺乳细胞及其克隆与稳定表达的研究

按DNA—磷酸钙共沉淀法将人白细胞介素2受体α链cDNA转染中国仓鼠卵巢细胞(CHOdhfr~-)及小鼠成纤维细胞(L929),获得稳定表达人IL-2Rα链的CHOdhfr~+细胞克隆。经RNA点渍杂交分析、荧光标记IL-2染色法、特异性ELISA和玫瑰花环试验检测证明,哺乳细胞表达的重组IL-2Rα链具有结合IL-2和抗Tac McAb的能力。还报道了T细胞白血病Jukat及Molt-4等细胞系异常表达IL-2R的结果,并作了分析讨论。     

心理应激对不同行为类型大学生血浆TXB2及6-Keto-PGF1a的影响

目的 探讨急性心理应激对不同行为类型人群的血浆血栓素B2（TXB2）及6-酮-前列腺素（6-keto-PGF1a）的影响。方法 用A型行为问卷（TABP）对150名大学生自愿者进行测试,筛选出A型行为和B型行为组各24名,再对A型行为和B型行为组随机分为应激组和对照组;应激后用放射免疫法测定其血浆中TXB2及6-Keto-PGF1a的含量。结果 心理应激后,实验组及A、B型行为实验组血浆TXB2浓度均升高,与对照组相比兰异有显著性（P〈0．05）;实验组及A、B型行为实验组血浆6-keto-PGF1a浓度均有变化,但差异均无显著性（P〉0．05）;实验组及B型行为实验组TXB2／6-Ke-to-PGF1a的比值都明显变大,差异均有显著性（P〈0．05）。结论 ①急性心理应激可导致大学生血浆TXB2升高,TXB2／6-Keto-PGF1a的比值变大,提示应激可能是引起心血管功能改变的关键因素之一;②心理应激对不同行为大学生血裳TXB2及6-Keto-PGF1a浓度的影响不同,该结果可能是揭示特定人格好发心脑血管痰病的机制之一。     

脑梗塞患者急性期脑脊液可溶性白细胞介素2受体的检测

可溶性白细胞介素２受体（ｓＩＬ２Ｒ）是白细胞介素２受体（ＩＬ２Ｒ）的游离形式，由于取材方便，易于检测，ｓＩＬ２Ｒ测定已作为临床衡量体内免疫功能的一种有用的新方法〔１〕。本研究采用双抗体夹心酶联免疫吸附法（ＥＬＩＳＡ）检测了４２例脑梗塞患者急性期...     

Requirement of high-affinity IL-2-IL-2R interaction for T cell anergy induction

Incomplete T cell antigen receptor-mediated signaling induces an unresponsive state known as anergy. Previously, we had shown that anergy can be induced in antigen-primed but not naive T cells. In this report, we found that in vitro primed T cells from IL-2R alpha-deficient mice were resistant to anergy induction in contrast to comparably treated wild-type T cells. This resistance persisted even after proliferation of IL-2R alpha chain-deficient CD4 T cells with high-dose IL-2-IL-2R beta gamma chains interaction. Thus, antigen activation, and/or progression through cell cycle are not sufficient to induce anergy susceptibility in T cells. The high-affinity IL-2-IL-2R interaction appears to play a critical role in this process.     

雷公藤单体T_4体外给药对IL－2R表达的影响

Ｔ_Ⅱ是中草药雷公藤的一类粗提物，临床治疗类风湿关节炎和系统性红斑狼疮等免疫性疾病效果显著。Ｔ_４是进一步从Ｔ_Ⅱ中提取出的单体成分。以正常人外周血单个核细胞（ＰＢＭＣ）为实验材料，测定了不同浓度的Ｔ_Ⅱ（０．０９８～３．１３Ｕ／ｍｌ）和Ｔ_４（０．０３９～５ｎｇ／ｍｌ）对于Ｔ细胞功能的影响。结果表明，Ｔ_Ⅱ和Ｔ_４对Ｔ细胞表面ＩＬ－２Ｒ的表达剂量相关的抑制作用。结果还显示，在药物作用下，ＩＬ－２对ＩＬ－２Ｒ表达的调节作用是很有限的。     

新生儿脐血T细胞IL－2R表达和血清sIL－2R水平的研究

对新生儿脐血Ｔ细胞ＩＬ－２Ｒ表达率和血清ｓＩＬ－２Ｒ水平进行检测，结果显示：①早产儿脐血Ｔ细胞ＩＬ－２Ｒ自然表达率明显低于足月新生儿和正常儿童组，而后两者间无差异；②经ＰＨＡ活化后足月新生儿和早产儿Ｔ细胞ＩＬ－２Ｒ表达率皆显著低于正常儿童组，早产儿组也明显低于足月新生儿组；③足月新生儿和早产儿脐血血清ｓＩＬ－２Ｒ水平均明显高于正常儿童组，但前两者间无明显差异；④新生儿组（包括足月和早产儿）脐血Ｔ细胞ＩＬ－２Ｒ自然表达率与血清ｓＩＬ－２Ｒ水平呈直线负相关，而正常儿童组二者间呈直线正相关。     

虫草多糖对人外周血IL－2、IL－ZR及IFN－γ调节作用的研究

本研究观察了冬虫夏草多糖（ｃｏｒｄｙｃｅＰｓＰｏｌｙｓａｃｃｈｒｉｄｅ，ＣＰ）对体外培养的外周血淋巴细胞（ＰＢＬ）的ＩＬ－２、ＩＬ－２Ｒ、ＩＦＮ－γ的影响。结果表明，ＣＰ可单独或协同ＰＨＡ诱导ＩＬ－２Ｒ的表达，促进可溶性ＩＬ－２Ｒ（ｓＩＬ－２Ｒ）的生成，但对ＰＨＡ诱生的ＩＬ－２、ＩＦＮ－γ活性有选择性抑制作用。其协同或抑制作用均呈剂量依赖性，吲哚美辛可部分或全部消除其抑制效应。提示ＣＰ对体外培养的ＰＢＬ具有双向免疫调节作用。     

子宫内膜异位症患者血清EMAb、VEGF、IL-2及IL-2R水平变化

目的：探讨子宫内膜异位症患者血清EMAb、VEGF、IL-2及IL-2R水平的变化及与病情进展的关系。方法：患者血清EMAb采用酶联免疫分析;VEGF、IL-2及IL-2R测定均采用放射免疫分析。结果：45例子宫内膜异位症患者的四项指标测定结果显示,EMAb阳性检出率治疗前组极显著高于对照组（P〈0.01）;经中西医结合治疗3个月后EMAb阳性检出率显著降低,但与对照组比较阳性检出率仍显著高于对照组（P〈0.05）。VEGF水平治疗前组也极显著高于对照组（P〈0.01）;中西医结合治疗3个月后水平显著下降,与对照组比较已无显著差异（P〉0.05）。IL-2水平则在治疗前组水平极显著降低（P〈0.01）;中西医结合治疗3个月后含量明显上升,与对照组比较无显著性差异（P〉0.05）。IL-2R治疗前升高极显著（P〈0.01）;3个月中西医结合治疗后血清水平明显下降,测定结果与对照组比较已无显著差异（P〉0.05）。结论：子宫内膜异位症患者血清EMAb、VEGF、IL-2及IL-2R四项指标发生了显著变化,其测定有助于该病的辅助诊断、病情评估及预后判断。     

SLE患者淋巴细胞膜上IL-2R表达的动态分析

本实验采用Wu Tac单克隆抗体的间接荧光抗体法,动态观察了系统性红斑狼疮(SLE)患者和正常供血员(对照组)的外周血淋巴细胞经PHA刺激后,于不同时间(0、24、48、72小时)内细胞膜上白细胞介素2受体(IL-2R)的表达。结果表明在给予PHA刺激培养24、48和72小时后,与对照组比较SLE患者淋巴细胞的IL-2R表达明显下降,提示了SLE的T淋巴细胞反应性降低可能与被激活的T细胞表面IL-2R的表达功能缺陷有关。此结果将有助于进一步探讨SLE的免疫调节紊乱的发生机制。     

IL-17/IL-17R与恶性肿瘤

IL-17是新近被确认的一种细胞因子,由T细胞、中性粒细胞等产生,其靶细胞分布广泛。IL-17具有强大的招募中性粒细胞、促进多种细胞释放炎性因子、促进细胞增殖的作用,被认为参与了机体多种炎症疾病、自身免疫性疾病和肿瘤等的发生,本文就IL-17/IL-17R在肿瘤中的研究进展做一综述。     

Efficient IL-2R signaling differentially affects the stability,function, and composition of the regulatory T-cell pool

Signaling via interleukin-2 receptor (IL-2R) is a requisite for regulatory T (Treg) cell identity and function. However, it is not completely understood to what degree IL-2R signaling is required for Treg cell homeostasis, lineage stability and function in both resting and inflammatory conditions. Here, we characterized a spontaneous mutant mouse strain endowed with a hypomorphic Tyr129His variant of CD25, the α-chain of IL-2R, which resulted in diminished receptor expression and reduced IL-2R signaling. Under noninflammatory conditions, Cd25^Y129H mice harbored substantially lower numbers of peripheral Treg cells with stable Foxp3 expression that prevented the development of spontaneous autoimmune disease. In contrast, Cd25^Y129H Treg cells failed to efficiently induce immune suppression and lost lineage commitment in a T-cell transfer colitis model, indicating that unimpaired IL-2R signaling is critical for Treg cell function in inflammatory environments. Moreover, single-cell RNA sequencing of Treg cells revealed that impaired IL-2R signaling profoundly affected the balance of central and effector Treg cell subsets. Thus, partial loss of IL-2R signaling differentially interferes with the maintenance, heterogeneity, and suppressive function of the Treg cell pool.     

Soluble plasma IL-2 receptors and malaria.

Plasma levels of soluble IL-2 receptor (sIL-2R) were measured by immunoassay in 180 individuals, aged 1-70 years, living in a malaria-endemic community in West Africa. sIL-2R levels were compared with age, malaria parasitaemia, malaria-associated morbidity and cellular immune responses to Plasmodium falciparum antigens. Plasma levels of sIL-2R were independently associated with both age and patent malaria parasitaemia. No significant association was observed between IL-2R levels and concurrent malaria morbidity (i.e. fever associated with malaria), but the number of individuals with clinical malaria at the time of sampling was small. Although there was no association between plasma sIL-2R levels and in vitro proliferative responses of peripheral blood mononuclear cells (PBMC) to a number of defined malaria antigens, we did find a significant negative association between sIL-2R and in vitro proliferation of unstimulated PBMC. High levels of sIL-2R (up to 5500 U/ml) were detected in the plasma of malaria-infected individuals; this is indicative of a vigorous cellular immune response to malaria antigens in vivo and does not support the notion that malaria infections are generally immunosuppressive. Indeed, we found that, at the low levels of parasitaemia present in study subjects, there was no significant difference in the mean proliferative response to malaria antigens in infected subjects when compared with uninfected subjects.     

Enhancement of IL-1, IL-2 production and IL-2 receptor generation in patients with acute rheumatic fever and active rheumatic heart disease; a prospective study.

In a prospective study, patients with quiescent rheumatic heart disease (CRHD), streptococcal pharyngitis (SP) and healthy normal subjects produced comparable amounts of IL-1 and IL-2, but acute rheumatic fever (ARF) patients produced significantly elevated amounts of IL-1 and IL-2 at all intervals up to 48 weeks. In active rheumatic heart disease (ARHD), IL-1 activity returned to within normal range at 48 weeks, but IL-2 activity remained persistently elevated compared with CRHD, SP and healthy age- and sex-matched volunteers. CD4+ T lymphocytes were significantly increased in the peripheral blood of ARF and ARHD patients. The amount of IL-2 produced by ARF and ARHD patients correlated with the percentage of helper T lymphocytes (CD4+ cells) but not with the percentage of suppressor/cytotoxic T lymphocytes (CD8+ cells). Moreover, pre- and post-phytohaemagglutinin (PHA)-stimulated peripheral blood mononuclear cell (PBMC) cultures from ARF and ARHD patients contained higher proportions of IL-2R+ (CD25+) cells than those from patients with SP, CRHD and normal individuals, which persisted up to 48 weeks. The percentage of CD25+ cells in both types of PBMC cultures directly correlated with the percentage of CD4+ cells and not with CD8+ cells in active rheumatic patients only. These findings indicate that the immune response in ARF and ARHD patients is skewed to produce activated helper T cells that release IL-2 which drives the accumulation of more T helper cells. The result is an undamped helper T cell response in the peripheral blood of these patients.