吲哚美辛对阻塞性黄疸病人外周血淋巴细胞IL-10、IL-2活性的影响

目的研究吲哚美辛对阻塞性黄疸病人外周血淋巴细胞IL-10、IL-2活性和血浆中前列腺素E2(PGE2)水平的影响。方法于阻塞性黄疸病人用药前及口服吲哚美辛(25mg,3次/d)7d后取周围血,分别用放射免疫和ELISA法测定其血浆中的PGE2水平及外周血淋巴细胞IL-10、IL-2活性。结果用药前,阻塞性黄疸病人血浆中PGE2水平及外周血淋巴细胞IL-10活性明显升高,而IL-2活性明显下降,且IL-10、IL-2的活性与PGE2水平显著相关;用药后,病人血淋巴细胞IL-2活性明显升高,而IL-10活性及血浆中PGE2水平明显下降,且与用药前相比有显著性差异。结论阻塞性黄疸病人存在细胞免疫功能受损,吲哚美辛能够明显改善其免疫功能状态,有可能成为临床上降低阻塞性黄疸病人易感性的有价值的药物之一。     

多次发病的传染性单核细胞增多症

传染性单核细胞增多症为EB(Epstein-Barr)病毒引起的一种急性或亚急性全身性免疫异常疾病。一次患病后,可获得持久免疫力,多次发病罕见。本文报告了一例传染性单核细胞增多症,9年内3次发病,结合文献资料复习,就本病的诊断、治疗、临床分型、复发问题以及与肿瘤的关系进行了讨论。     

氯丙嗪和氯氮平对小鼠生殖细胞和人淋巴细胞的诱变效应

为探讨氯丙嗪和氯氮平在使用临床治疗剂量时的遗传毒理效应，研究了两药对小鼠生殖细胞和小鼠子代体细胞的影响，以及对人体淋巴细胞姊妹染色单体互换（ＳＣＥ）频率及微核率的影响。结果显示：（１）连续给药５天后第１周两药高、中、低三个剂量组均能引起小鼠精子头部畸形率明显增高，但停药４周后对精子的致畸作用基本消失；（２）两药对小鼠睾丸细胞及子代体细胞的染色体结构畸变率均无明显影响；（３）两药在治疗剂量时对人淋巴细胞的ＳＣＥ频率及微核率无明显影响，治疗前后的自身对照研究亦未见两频率有明显改变；（４）两药的血药浓度与ＳＣＥ频率及微核率之间无量效关系。研究结果提示，两药在临床治疗剂量时对小鼠生殖细胞染色体结构以及对人体遗传物质均无明显损伤作用。     

铁缺乏时淋巴细胞增殖反应改变的实验研究

本研究采用体外细胞培养，３Ｈ－Ｔｄｒ掺入，原子吸收光谱分析等技术方法，观察了低浓度Ｆｅ－ｃｉｔ时淋巴细胞内铁浓度变化及经ＣｏｎＡ、ＰＨＡ诱导的细胞增殖反应能力改变，结果显示：铁缺乏时（第２、３、４组）ＳＩ降低，与正常组（第１组）比较相差非常显著（Ｐ＜０．０１），ＳＩ与细胞内铁浓度的变化呈显著正相关（Ｐ＜０．０５，ｒ１＝０．９４６６，ｒ２＝０．９３３９），说明铁缺乏时淋巴细胞增殖反应能力受抑。     

Induction of apoptotic cell death in rat thymus and spleen after a bolus injection of methamphetamine

We examined whether methamphetamine (MAP) induced apoptotic cell death in vivo. Male Wistar rats were injected intraperitoneally with 25 mg MAP/Kg body weight and were sacrificed at 4, 8 and 24 h. As early as 4 h after a single dose of MAP, DNA ladder bands representing DNA fragmentation into multiples of the internucleosomal DNA length of about 180 by were observed by gel electrophoresis in thymic and splenic DNA. DNA from control rats injected with 1 ml physiological saline/Kg body weight showed no ladder band patterns. The proportion of fragmented DNA from the thymus increased in a time-dependent manner up to 8 h and faint ladder band patterns were observed at 24 h, indicating that cell death via apoptosis occurred at an early stage and then apoptotic bodies were scavenged. DNA fragmentation in the thymus and spleen induced with MAP was also confirmed by the terminal deoxynucleotidyl transferase-mediated dUTPbiotin nick end labeling (TUNEL) method in situ. In control thymus samples, stained cells were numerous in the cortex but sparse in the medulla. At the boundary area between the cortex and medulla, stained cells were seen as a layer. In the MAP-treated rats, stained cells were increased and dispersed equally in the cortex and medulla. In control spleen samples, stained cells were numerous in all areas excluding the germinal centers. Cells at the germinal centers were stained intensively in MAP-treated rat spleen. Light microscopical analyses allowed us to identify lymphocytes during the course of apoptotic cell death. Electron microscopic studies showed morphological landmarks for the process of cellular apoptosis in both organs e.g. lymphocytes with chromatin condensed into crescents at the periphery of the nuclei and apoptotic bodies. These results indicate that MAP induced cell death of the thymic and splenic lymphocytes via apoptosis.     

体外培养诱导外周血淋巴细胞促进大鼠面神经再生的实验研究

目的:通过在神经缺损处局部回输体外分离培养纯化的淋巴细胞,了解此种方法促进面神经损伤修复的效果。方法:将20只Wistar大鼠的面神经颊支剪断并立即缝合(其余3支反折缝合)制成面神经损伤模型大鼠,将其分成淋巴细胞组和对照组,每组10只,每组再分成2周组和8周组。淋巴细胞组局部回输体外分离培养的外周血淋巴细胞,对照组作对照。于2周和8周测定面神经颊支-触须肌复合动作电位传导速度,辣根过氧化物酶(HRP)神经逆行示踪测定面神经核团的神经元阳性数目。结果:淋巴细胞组面神经颊支-触须肌复合动作电位传导速度8周时为0.64±0.07,与对照组(0.56±0.07)相比,差异有统计学意义(P<0.05)。HRP神经逆行示踪测定面神经核团神经元阳性数目,淋巴细胞组2周及8周与对照组同时间段相比差异均无统计学意义(均P>0.05)。结论:体外分离培养纯化的淋巴细胞在局部应用于神经损伤处对面神经再生修复可起一定的促进作用。     

大蒜素对恶性肿瘤患者淋巴细胞免疫功能的影响

目的：探讨大蒜素对恶性肿瘤患者淋巴细胞免疫功能的影响。方法：恶性肿瘤患者每人每次口服大蒜素30mg,每日3次，连续服用，半年取其他化、放疗，用硷性磷酸酶－抗硷性磷酸酶（APAAP）法检测30例恶性肿瘤患者服用大蒜素前、后1、2、3月及30例正常对照组的淋巴细胞免疫功能。结果：恶性肿瘤患者淋巴细胞免疫功能显著低于对照组（P＜0．05），服用大蒜素后淋巴细胞免疫功能接近或高于对照组。结论：大蒜素能提高恶性肿瘤患者的淋巴细胞免疫功能。     

Profile of cytokine production in mixed kidney lymphocyte culture

Abstract Kidney cells are an important source of immunoregulatory molecules that regulate cell-to-cell interactions, which is the key step in the generation of the immunoresponse to alloantigens. In this study we identified the cytokines that are produced by both lymphoid cells and kidney cells when coincubated in mixed kidney lymphocyte cultures (MKLC). The capacity of kidney cells to stimulate the proliferation of effector allogeneic lymphocytes was assayed by incubating irradiated kidney cells and lymphocyte. The cytokine secretion profile in MKLC was investigated by incubating monolayers of kidney cells with effector peripheral blood mononuclear cells (PBMC). The culture supernatants were harvested on days 1, 2, 3, 4, 5, 6, 7, and 8 and assayed for IL-1β, IL-2, IL-6, and TNF alpha using an ELISA. Kidney cells, in comparison to PBMC stimulator cells were poor stimulators of the allo-proliferation even when HLA expression was increased by IFN gamma treatment. Compared to lymphocyte or kidney cells incubated alone, MKLC induced a considerable stimulation of cytokine production. This increase in cytokine production was observed essentially for IL-2 and IL-6 (at day 3, a 10-fold increase in IL-2 and a 5-fold increase in IL-6). This study provided evidence that target kidney cells and effector lymphocyte interactions generate a number of cytokines such as IL-11, IL-2, IL-6, or TNF alpha. These cytokines are known to modulate alloproliferation and generation of cytotoxic J lymphocytes (CTL).     

Lymphocyte β-adrenergic receptor binding in panic disorder

Lymphocyte beta adrenergic receptor binding using [¹²⁵I]CNP was determined in patients with panic disorder (N=4) or agoraphobia with panic attacks (N=17) and age- and sex-matched healthy subjects (N=22). The patients showed a significantly lower number of -adrenergic receptor binding sites and a significantly higher affinity of binding than healthy subjects. A past or present history of major depression in the patients did not alter these findings. These results are consistent with a growing body of knowledge implicating noradrenergic dysfunction in the pathophysiology of panic anxiety.     

人外周血淋巴细胞褪黑素受体的基因与蛋白表达的研究

目的:研究人外周血淋巴细胞褪黑素受体(MR)的基因与蛋白表达的特点。方法:分离健康成年人外周血淋巴细胞,采用异硫氢酸胍-苯酚-氯仿一步法抽提总RNA,分别采用Northern印迹和RT-PCR方法检测MR亚型mt₁和MT₂的mRNA,并将RT-PCR的阳性产物通过自动测序仪测序;同时应用免疫组化染色方法检测mt₁和MT₂受体亚型蛋白在淋巴细胞内的分布特点。结果:Northern印迹方法检测出长约1.1 kb mt₁ mRNA,但未检出长约1.1 kb MT₂ 的mRNA;RT-PCR方法则得到了368 bp mt₁ cDNA片段,无321 bp MT₂ cDNA片段,同时将mt₁阳性条带通过胶回收、测序,结果显示扩增产物与人mt₁受体亚型的基因序列相吻合;免疫组化结果显示:人外周血淋巴细胞存在mt₁受体蛋白,主要分布于细胞膜和细胞浆,呈棕褐色阳性颗粒,而细胞核上未见阳性颗粒,MT₂受体蛋白则未检出。结论:证实正常人外周血淋巴细胞存在mt₁的基因与蛋白的表达,而无MT₂的基因与蛋白的表达,提示外周血淋巴细胞为褪黑素(Mel)作用的外周靶器官,为研究生理及病理情况下Mel对免疫系统的调节奠定了基础。