Differential effects of interleukin 12 and interleukin 10 on superantigen-induced expression of cutaneous lymphocyte-associated antigen (CLA) and alphaEbeta7 integrin (CD103) by CD8+ T cells

At both cutaneous and mucosal sites, interleukin (IL)-10, IL-12 and transforming growth factor (TGF)-beta are important regulators of chronic inflammatory disease, where cutaneous lymphocyte-associated antigen (CLA) and alphaE integrin (CD103) may be expressed. Stimulation with streptococcal pyrogenic exotoxin C (SpeC) increased the expression of CD103 by CD8+ but not CD4+ T cells. While adding IL-12 augmented the expression of CLA, superantigen-induced expression of CD103 was markedly suppressed by IL-12, which could be reversed by TGF-beta. Antibodies against TGF-beta inhibited, and a combination of anti-TGF-beta and IL-12 completely abrogated the induced CD103 expression. IL-10 strongly decreased the frequency of CLA+ and although not increasing the frequency of CD103+CD8+ T cells, the amount of CD103 expressed per cell was markedly increased. Thus, the expression of CLA and CD103 may be antagonistically regulated by IL-10 and IL-12 and the balance between these cytokines could influence the T cell migration of inflammatory cells into epithelial tissues.     

HLö 7 dimethanesulfonate,a potent bispyridinium-dioxime against anticholinesterases

HLö 7 dimethanesulfonate (1-[[[4-(aminocarbonyl)pyridinio] methoxy] methyl] -2,4-bis [(hydroxyimino) methyl]pyridinium dimethanesulfonate) is a broad-spectrum reactivator against highly toxic organophosphorus compounds. The compound was synthesized by a new route with the carcinogenic bis(chloromethyl)ether being substituted by the non-mutagenic bis(methylsulfonoxymethyl)ether. The very soluble dimethanesulfonate of obidoxime was also prepared by this way. HLö 7 dimethanesulfonate is the first water-soluble salt of HLö 7 that should be suitable for the wet/dry autoinjector technology, because aqueous solutions of HLö 7 are not very stable (calculated shelf-life 0.2 years when stored at 8°C, 1 M solution, pH 2.5). The crystalline preparation contains 96% of thesyn/syn-isomer, less than 2% of thesyn/anti-isomer and some minor identified by-products. HLö 7 was very efficient in reactivating acetylcholinesterase (AChE) blocked by organophosphates as long as ageing did not prevent dephosphylation. HLö 7 was superior to HI 6 (1-[[[4-(aminocarbonyl)pyridinio]methoxy]methyl]-2-[(hydroxyimino)methyl]pyridinium dichloride) in reactivating soman and sarin-inhibited AChE from erythrocytes, and literature data indicate that HLö 7 exceeds HI 6 by far in reactivating tabun-inhibited AChE. In atropine-protected, soman-poisoned mice HLö 7 was three times more potent than HI 6 (protective ratio 5 versus 2.5), and in sarin-poisoned mice HLö 7 was 10 times more potent than HI 6 (protective ratio 8 for both oximes). In atropine-protected guinea-pigs HLö 7 was less effective than HI 6 (protective ratio: 2.3 versus 5.2 for soman; 5.2 versus 6.8 for sarin; 4.3 versus 3.8 for tabun). The mean survival time of anaesthetized guinea-pigs exposed to 5 LD₅₀ soman (6.3 min) was increased by atropine (27 min) and atropine + HLö 7 (57 min). HLö 7 alone did not prolong the survival. The most impressive effect of HLö 7 was on respiration: 3 min after i.v. injection of HLö 7 and atropine, the depressed respiration increased rapidly to 60% of control and remained at that level during the observation period (60 min). With atropine alone, respiration recovered only slowly. Behavioural and physiologic parameters were determined in atropine-protected mice exposed to a sublethal soman dose. The running performance was significantly improved by HLö 7. Even central symptoms, e.g. hypothermia and convulsions, were decreased markedly by HLö 7 (evaluation 60 min after poisoning). The pharmacokinetic data for HLö 7 in male beagle dogs are similar to those of HI 6. After i.v. injection: t_1/2 = 5 min; t_1/2ß = 46 min; V_D = 0.24 1/kg; Cl_p1 = 3.7 ml x min^–1 x kg^–1; Cl_ren= 3.2 ml x min^–1 x kg^–1; renal excretion of unchanged HLö 7 = 86%. After i. m. injection: t_1/2abs = 14 min; t_1/2ß = 48 min; Vd = 0.27 1/kg; Cl_p1= 3.9 ml x min^–1 x kg^–1; Cl_ren= 2.7 ml x min^–1 x kg^–1; renal excretion of unchanged HLö 7 = 76%; bioavailability >95%. Plasma protein binding was <5%; HLö 7 did not permeate into red cells. A dose of 20 mol/kg was well tolerated both after i.v. and i.m. administration. In anaesthetized dogs (chloralose) HLö 7 i.v. (20 (imol/kg) showed marginal hypotensive effects, whereas 50 mol/kg resulted in decreased mean blood pressure (–15%) and blood flow (–30%) without reflex tachycardia. One out of four dogs developed a circulatory shock syndrome with anuria. Respiration varied only transiently. Blood gases and pH were not influenced. Similar cardiovascular effects were observed in anaesthetized (urethane) guinea-pigs. In isolated guinea-pig hearts (Langendorff) sinus and ventricular heart rate were not influenced by HLö 7 <500 M. HLö 7 antagonized both carbachol and nicotine effects. Red cell AChE was inhibited by HLö 7 by up to 50%; C₅₀ about 100 M. Previously, HLö 7 was shown to block ganglionic transmission (IC₅₀= 500 M), probably due to ion-channel blockade. These data indicate that HLö 7 combines ganglion blocking, anticholinergic and indirect cholinergic properties like other bispyridinium compounds. The results suggest that HLö 7 may be tolerated by man at a dose of 10 mol/kg. Vital functions are not expected to be impaired. At such a dose (250–500 mg), which can be injected by an autoinjector, HLö 7 is expected to be superior to HI 6.Part of thesis     

Tju103和CTLA4-Ig诱导MHC半相合小鼠骨髓移植耐受比较

目的：观察Tju103和CTLA4—Ig各自对MHC半相合小鼠骨髓移植免疫耐受的诱导。方法：半相合供鼠T细胞与受鼠抗原、Tju103(或CTLA4—Ig)共育后与骨髓细胞混合移植，观测移植后受情况。结果：A．单纯照射组：全部小鼠于照射后11d内死于造血衰竭；B．白血病CTX治疗组：全部小鼠于接种白血病细胞后16—23d死于白血病；C．单纯移植组：全部小鼠于移植后21d内死于移植物抗宿主病(GVHD)；D．CsA预防组：5只小鼠于移植后8—22d死亡，1只死于白血病，各有2只死于GVHD和感染，5只活过30d；E．Tju103处理组：4只小鼠于移植后9～26d死亡，2只死于GVHD，各有1只死于白血病和感染，6只活过30d；F．CTLA4—Ig处理组：2只小鼠于移植后17—26d死亡GVHD，8只活过30d。结论：Tju103和CTLA4—Ig均明显延长生存期，降低GVHD发生和严重程度，CTLA4—Ig保留有抗感染和移植抗白血病(GVL)作用，而Tju103没有。     

放射性粒子103 Pd与缓释化疗粒子联合应用靶向治疗肝癌

目的探讨应用放、化疗粒子联合植入法综合治疗肝癌的可行性、安全性及短期疗效。方法自2001年12月～2004年12月，应用放、化疗粒子联合植入法综合治疗复发性直肠癌48例。在治疗计划指导下，交替植入5-Fu缓释化疗粒子和放射性。Pd粒子。放射性粒子的肿瘤匹配周边剂量（Matched Peripheral dose，MPD）为90～130Gy。平均每例使用^103Pd粒子10粒，5-Fu 1000mg。结果48例病人手术均顺利完成，未发生出血、感染等并发症，经摄片证实放射性粒子的位置无变化。疼痛缓解率为95．83％（46／48），平均疼痛缓解时间为5～9d。于术后3～6个月CT复查肿瘤变化，提示瘤体不同程度缩小，其中11例完全缓解，27例部分缓解，9例稳定，局部控制率为79．17％。随访6～28个月，中住生存期为17个月，最长1例随访时间为术后26个月，现仍存活。1例术后6个月死于全身广泛转移。结论放射性^103Pd粒子和5-Fu缓释化疗粒子联合应用局部植入技术具有安全、微创及并发症发生率低的特点，是综合治疗肝癌的较有效手段之一。     

Hypoxic Lung-Cancer-Derived Extracellular Vesicle MicroRNA-103a Increases the Oncogenic Effects of Macrophages by Targeting PTEN

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急性缺血性脑卒中患者血清miR-103,miR-29b的表达水平变化及其临床意义

目的 探讨急性缺血性脑卒中(AIS)患者血清miR-103,miR-29b的表达水平变化及其临床意义。方法 收集2016年1月-2019年12月本院神经内科收治的126例AIS患者(AIS组),根据美国国立卫生研究院卒中量表(NIHSS)评分将其分为轻度组(45例)、中度组(57例)和重度组(24例),根据改良Rankin量表(mRS)评分将其分为预后良好组(78例)和预后不良组(48例),另选择56例同期于本院门诊体检健康者为对照组,检测血清miR-103,miR-29b表达水平,Spearman秩相关性分析miR-103,miR-29b表达水平与NIHSS,mRS评分的相关性,受试者工作特征曲线(ROC)分析miR-103,miR-29b表达水平对神经功能预后的预测价值。结果 AIS组血清miR-103表达水平高于对照组(P<0.05),miR-29b表达水平低于对照组(P<0.05),血清miR-103表达水平随着AIS患者神经缺损程度加重而升高(P<0.05),miR-29b表达水平则降低(P<0.05)。预后不良组血清miR-103表达水平高于预后良好组(P<0.05),miR-29b表达水平低于预后良好组(P<0.05)。Spearman秩相关性分析显示AIS患者血清miR-103表达水平与NIHSS评分、mRS评分呈正相关(r₂=0.636、0.794,P<0.05),miR-29b表达水平与NIHSS评分、mRS评分呈负相关(r₂=-0.664、-0.659,P<0.05)。ROC分析显示miR-103,miR-29b表达水平预测AIS患者神经功能预后的曲线下面积(AUC)为0.713、0.741,联合miR-103,miR-29b表达水平预测AIS患者神经功能预后的AUC为0.918,高于单独miR-103,miR-29b表达水平(P<0.05)。结论 AIS患者血清miR-103表达水平升高,miR-29b表达水平降低,miR-103表达上调、miR-29b表达缺失均与AIS患者神经功能缺损程度和神经功能恶化有关,可以为患者神经功能预后评估提供参考。     

Aumento de la expresión de las moléculas CD11c y CD103 en neutrófilos de sangre periférica tratados con una formulación de ribosomas bacterianos y proteoglicanos de Klebsiella pneumoniae

Aim

To evaluate the effect of a preparation with bacterial ribosomes and proteoglycans from Klebsiella pneumoniae «R» on the in vitro expression of CD11c and CD103 molecules in neutrophils from peripheral blood.

Methods

Isolation of neutrophils from peripheral blood with Ficoll-Paque, incubation with R and detection of CD11c and CD103 through flow cytometry.

Results

Six hours after the incubation period, CD11c expression increased significantly compared with the control with 125 and 500 μg/ml of R (P = .017 and P = .006, respectively). CD103 expression induced with 125 μg/ml of R after 6 hours was significantly higher than that observed after 4 hours at the same concentration (P = .014) and that found with 62.5 μg/ml (P = .017) of R.

Conclusions

The increased expression of CD11c and CD103 induced by R in the neutrophils could contribute to the R mechanism against respiratory pathogens.     

TJU103对小鼠同种异基因造血干细胞移植模型GVHD的预防作用

目的探讨TJU103对小鼠同种异基因造血干细胞移植模型移植物抗宿主病(GVHD)是否起预防作用。方法(1)用单向混合淋巴细胞培养方法检测TJU103对T淋巴细胞增殖的影响;(2)以BALB/c(H-2d)、CB6F1(H-2d/b)分别作为完全异基因移植和半相合基因移植的受鼠,给予9.0Gy全身照射后4h,单纯照射组经尾静脉注射0.3mlD-Hank's液,不进行细胞移植;对照组经尾静脉注射C57BL/6小鼠混合细胞悬液(4.5×106骨髓细胞 3.0×107脾细胞),但不进行其他治疗处理;实验组经尾静脉注射C57BL/6小鼠混合细胞悬液(4.5×106骨髓细胞 3.0×107脾细胞) TJU103(终浓度25μg/ml),此后腹腔注射TJU10350μg/d,共7d,然后观察其造血恢复、植入及GVHD的情况。结果(1)TJU103可以显著抑制T细胞活化增殖,其抑制作用呈剂量依赖性,在25μg/ml浓度时,可以抑制83%细胞增殖。(2)由于没有给予GVHD防治措施,对照组受鼠GVHD的发生率和死亡率分别为10/10和10/10;而完全异基因移植实验组小鼠GVHD发生率仅为2/10,30d生存率增加至8/10(P<0.01),中位生存期延长至30d以上(P<0.01);半相合基因移植实验组小鼠GVHD发生率为1/10,30d生存率增加至9/10(P<0.01),中位生存期延长至30d以上(P<0.01)。结论TJU103不仅可以显著抑制体外T淋巴细胞增殖效应,而且可显著降低小鼠同种异基因造血干细胞移植模型GVHD的发生率。     

miR-96与miR-103在肝癌组织中的表达及其与预后的关系

目的 探讨miR-96与miR-103在肝癌组织中的表达及其与预后的关系。方法 选取122例肝细胞癌患者作为本研究对象。聚合酶链式反应检测miR-96和miR-103表达水平,采用单因素和多因素Cox回归模型,探讨肝癌患者中位生存时间的危险因素并建立预测模型。结果 肝癌组织中miR-96和miR-103相对表达水平均显著高于癌旁正常组织;肝癌组织中miR-96和miR-103的表达与肿瘤直径、淋巴结转移、临床分期及分化程度均有关（均P<0.05）,而与性别、年龄及合并肝硬化等无关（P>0.05）;所有患者随访60月,中位生存时间为37.8月。单因素分析结果显示：肝细胞癌患者中位生存时间与肿瘤直径、淋巴结转移、TNM分期、病理分化程度、miR-96和miR-103表达水平差异均有统计学意义（均P<0.05）。多因素分析结果显示：TNM分期为Ⅲ~Ⅳ、低分化、淋巴结转移、miR-96和miR-103高表达是肝癌患者中位生存时间独立危险因素。结论 肝癌组织中miR-96和miR-103的高表达是患者预后差的独立影响因素,可作为原发性肝癌患者预后评估指标。