黄芪对肺纤维化大鼠Th1/Th2型细胞因子平衡及自由基代谢的影响

目的 研究黄芪水提物、黄芪皂苷对博莱霉素(BLM)所致肺纤维化大鼠Th1/Th2型细胞因子平衡、NO、SOD、MDA及肺组织病理结构的影响,探索黄芪阻抑肺纤维化的效应及其机制.方法 Wister大鼠随机分为空白组、BLM模型组、地塞米松组、黄芪水提物组、黄芪皂苷组;气管内注入BLM制作大鼠肺纤维化模型,造模后第2天开始药物干预,14、28 d各取6只大鼠,分别检测血IFN-γ、IL-4、NO水平,肺组织SOD、MDA水平及肺组织病理结构的动态变化.结果 与空白组比较,模型组大鼠IFN-γ、IFN-γ/IL-4比值、SOD含量降低,IL-4、NO、MDA的含量明显升高,肺组织发生明显的肺泡炎及纤维化改变(P＜0.05);与模璎组比较,黄芪水提物组、黄芪皂苷组、地寒米松组使大鼠血IFN-γ、IFN-γ/IL-4比值、SOD含量明显升高,NO、MDA含量明显降低,肺组织的肺泡炎及纤维化程度明显降低(P＜0.05);黄芪水提物组、黄芪皂苷组与地塞米松组比较,各指标均无统计学差异(P＞0.05).结论黄芪水提物、黄芪皂苷对肺纤维化大鼠肺组织均具有保护作用,调节Th1/Th2型细胞因子的平衡及NO代谢、及提高抗氧化能力可能是其阻抑肺纤维化发生的机理之一.     

黄芪注射液对哮喘大鼠p38 MAPK和Th1/Th2类细胞因子变化的影响

目的： 探讨黄芪注射液对哮喘大鼠气道炎症和Th1/Th2类细胞因子（IFN-γ/IL-4）变化的影响及其可能机制。方法：雄性SD大鼠40只随机分成5组，即正常对照组、哮喘模型组和黄芪低、中、高剂量干预组。分别采用酶联免疫吸附法（ELISA）、逆转录-聚合酶链反应（RT-PCR）和蛋白质印迹检测支气管肺泡灌洗液（BALF）中IL-4、 IFN-γ含量、肺组织中IL-4 mRNA、 IFN-γ mRNA表达和磷酸化p38 MAPK的变化，并观察BALF中炎症细胞和肺组织病理学改变。结果：哮喘模型组大鼠BALF中炎症细胞计数、IL-4含量和肺组织中IL-4 mRNA、磷酸化p38 MAPK表达水平升高，IFN-γ、IFN-γ mRNA水平降低，与正常对照组比较，显著差异（P<0.01）。黄芪低、中、高剂量干预组大鼠BALF中炎症细胞计数、IL-4含量和肺组织中IL-4 mRNA、磷酸化p38 MAPK表达水平均明显降低，IFN-γ、IFN-γ mRNA水平明显上升，与哮喘模型组比较，均具有显著差异（P<0.01）。黄芪处理能明显减轻哮喘大鼠肺组织病理学改变，但黄芪低、中、高剂量干预组之间比较，无显著差异（P>0.05）。肺组织磷酸化p38 MAPK的表达与EOS计数、IL-4、IL-4mRNA之间分别呈显著正相关（r=0.63，r=0.69，r=0.71，P<0.01），与IFN-γ和IFN-γ mRNA之间分别呈显著负相关（r=-0.65，r=-0.68，P<0.01）。结论：p38 MAPK可能参与了支气管哮喘的发病过程。黄芪注射液对哮喘大鼠具有保护作用，其机制可能与抑制p38 MAPK磷酸化、纠正IFN-γ/IL-4平衡失调、减轻炎症细胞浸润有关。     

玉屏风散对S180荷瘤小鼠Th1／Th2型细胞因子的影响

目的探讨玉屏风散对荷瘤小鼠Th1／Th2型细胞因子产生的影响。方法采用体外培养S180肉瘤细胞，接种C57BL／6纯系小鼠，建立荷瘤小鼠模型，设正常对照、荷瘤对照及玉屏风散给药组，检测各组脾脏T淋巴细胞增殖能力及Th1（IL-2、IFN-γ）和Th2（IL-4、IL-10）细胞因子产生水平。结果荷瘤组T细胞增殖能力明显下降，Th2型细胞因子IL-10的产生明显增加，与正常对照组比较均有统计学意义（P〈0．01），而IL-4的含量略有增加，但无统计学意义。Th1型细胞因子IL-2及IFN-γ的产生明显减少，与正常对照组比较有统计学意义（P〈0．01，P〈0．05）。玉屏风散给药对T细胞增殖能力及细胞因子的产生有较为明显的调节作用，与荷瘤组比较T细胞增殖能力及IL-2、IFN-γ的产生明显增加（P〈0．01），Th2型细胞因子IL-10的血清含量下降（P〈0．01）．IL-4的含量略有下降，但与荷瘤对照组比较无统计学意义。结论玉屏风散可有效调节荷瘤小鼠的免疫功能，促进荷瘤鼠Th1型细胞因子的产生，有效纠正荷瘤导致Th1／Th2的失衡，增强机体的抗肿瘤免疫功能。     

TRAIL对CIA小鼠脾细胞表达Th1/Th2细胞因子的影响

 摘要：目的 观察肿瘤坏死因子相关凋亡诱导配体（Tumor Necrosis Factor Related Apoptosis Inducing Ligand , TRAIL）对胶原诱导型关节炎（Collagen-induced arthritis, CIA）小鼠的治疗效果,探讨TRAIL治疗类风湿性关节炎（Rheumatoid Arthritis, RA）的可能机制。方法 牛Ⅱ型胶原蛋白加弗氏完全佐剂免疫DBA/1J小鼠建立CIA模型,采用重组腺相关病毒AAV-TRAIL关节腔内注射进行治疗。CBA和流式细胞术检测Th1/Th2细胞因子的分泌。结果 AAV-TRAIL可改善CIA小鼠的病情,体外研究其机制发现TRAIL可抑制CIA小鼠的脾细胞分泌Th1型细胞因子,但对Th2型细胞因子没有作用。结论TRAIL对CIA小鼠的治疗作用可能和TRAIL抑制Th1型细胞因子分泌相关。     

甲乙肝联合疫苗中不同配比对小鼠Th1/Th2型细胞因子变化的影响

目的 通过注射甲乙肝联合疫苗和单价甲肝、乙肝疫苗来观察小鼠在免疫过程中细胞因子的变化情况,衡量应答的性质,探讨两种抗原对小鼠细胞因子变化的不同作用以及乙肝抗原对甲肝抗原的作用.方法 选用150只 Balb/c 小鼠随机分成注射联苗 640 Eu/mL:10 μg/mL组、640 Eu/mL:20μg/mL组、单价甲肝抗原640 Eu/mL组、单价乙肝抗原10μg/mL组、单价乙肝抗原20μg/mL组和佐剂AL(OH)3,对照组,每组25只.于第4周加强免疫1次,分别在初次免疫注射后第1、2、3、4周及加强免疫后第2周,眼眶采血,分离血清,每组各5只小鼠,上流式细胞仪检测小鼠血清5种细胞因子(TNF、IFN-γ、IL-5、IL-4、IL-2)含量.结果 疫苗诱导产生的Th1/Th2型细胞因子均随时间的变化而变化,5种细胞因子均约在第3周达最大值,其中小鼠产生最多的是TNF;加强免疫后,640 Eu/mL:20 μg/mL联苗组刺激小鼠产生细胞因子水平高于640 Eu/mL:10μg/mL联苗组.结论 甲乙肝联合疫苗能刺激机体产生特异性细胞免疫应答,甲乙肝联合疫苗能诱导机体产生与单价相同或略强的Th1/Th2型细胞因子.     

SARS患者淋巴细胞亚群和Th1/Th2细胞因子的检测与意义

为了解SARS患者糖皮质激素治疗后细胞免疫状况 ,系列观察我院 7例SARS确诊者 (5男 2女 ,2 8～ 6 8岁 )淋巴细胞亚群及细胞因子变化 ,病程 0～ 6 1d。另选 31例HIV感染者作疾病对照 ,2 4例健康献血员作正常对照。用流式细胞术检测外周血CD3、CD4和CD8细胞 ,以ELISA法检测血清Th1/Th2类细胞因子 (IFN γ/IL 4 )含量。结果是SARS组CD3、CD4、CD8均值 (5 2 9 80、 313 0 9、 195 94 /μl)都低于正常组均值 (14 2 0 95、 80 9 80、 5 30 95 /μl) ,P均 <0 0 0 1;与HIV组均值(813 2 3、 176 81、 6 0 3 10 /μl)比较 ,CD4、CD8偏低 (P <0 0 0 6、P <0 0 0 1)。SARS组CD4 /CD8比值与正常组相比 ,差异不显著。淋巴细胞亚群数目与病程密切相关。SARS组Th1/Th2类细胞因子水平 (A均值 0 0 5 8/0 0 31)均低于HIV组 (A均值0 0 79/0 0 33)和正常组 (A均值 0 111/0 0 35 ) ,细胞因子含量与病程无关。提示我们所观察的SARS患者细胞免疫功能低下。     

LAG-3-Ig对过敏性哮喘小鼠的Th1/Th2型细胞因子水平和气道反应性的影响

目的:研究淋巴细胞活化基因-3-Ig(LAG-3-Ig)对哮喘小鼠Th1和Th2型细胞因子的比例和气道反应性的影响,为防治哮喘提供实验依据。方法:经卵蛋白(OVA)致敏的雌性BALB/c小鼠于激发前腹腔注射LAG-3-Ig50g,末次激发24h后,收集支气管肺泡灌洗液(BALF),以ELISA法测定BALF中IL-4、IL-5和IFN-γ水平。同时观察哮喘小鼠气道反应性的变化。结果:与治疗前比较,经LAG-3-Ig治疗后,哮喘小鼠BALF中IL-4和IL-5的水平显著降低(分别减少了27.9%和29.6%);而IFN-γ的水平显著增高(增加30.8%,P<0.01)。LAG-3-Ig治疗组小鼠气道螺旋条对组织胺的反应性降低,各个密度的组织胺所诱导的气管螺旋条收缩张力显著低于哮喘对照组(P<0.05)。结论:LAG-3-Ig可抑制哮喘小鼠IL-4和IL-5的分泌并能降低小鼠气道的反应性,对哮喘的治疗具有临床意义。     

褪黑素体内外对胃癌Th1/Th2/Th17型细胞因子表达的影响

目的 探讨褪黑素（MLT）体内外对胃癌Th1/Th2/Th17型细胞因子干扰素（IFN）-γ、肿瘤坏死因子（TNF）、白细胞介素（IL）-2、IL-4、IL-6、IL-10、IL-17a表达的影响。 方法 1.构建荷胃癌小鼠模型,共32只雄性615小鼠全部荷小鼠前胃癌（MFC）细胞后随机分为4组,分别用0、25、50、100 mg/kg剂量褪黑素进行腹腔注射并测量肿瘤长短径。干预1周后取外周血,剥离肿瘤组织进行称重和测量。2.将MFC接种于6孔细胞培养板中,贴壁24 h后分别用0、2、4、6、8、10 mmol/L浓度褪黑素干预,24 h后形态学观察并收集相应上清液。3.采用ELISA检测外周血清中褪黑素的浓度变化。采用流式液相多重蛋白定量技术流式微珠阵列（CBA）分别检测外周血清、细胞上清液中Th1/Th2/Th17型相关细胞因子的浓度变化。 结果 1.成功建立荷胃癌小鼠模型。与阴性对照组相比, 褪黑素中、高剂量组小鼠外周血清褪黑素浓度明显升高,肿瘤体积明显下降。与阴性对照组相比,中剂量组血清中IL-10浓度明显增加;高剂量组血清IFN-γ、IL-2、IL-10浓度均明显增加。2.褪黑素干预MFC细胞实验中,与空白对照组相比,6、10 mmol/L 褪黑素组中IFN-γ浓度显著降低;4、6、8、10 mmol/L 褪黑素组中IL-6浓度明显降低,而 6 mmol/L 褪黑素组IL-10浓度明显升高。以上差异均具有统计学意义（P<0.05）。 结论 褪黑素体内外对胃癌细胞均有抑制作用且可能通过调节Th1/Th2/Th17细胞相关因子IFN-γ、IL-2、IL-6及IL-10的表达起增强肿瘤免疫作用。     

旋毛虫对不同肠炎模型小鼠脾脏淋巴细胞Th1/Th2水平的影响

目的：研究旋毛虫（T.spiralis）对肠炎小鼠［三硝基苯磺酸（TNBS）或唑酮（OXZ）诱导］脾脏淋巴细胞中Th1/Th2水平的影响。方法：雌性BALB/c小鼠,随机分为50%乙醇对照组、TNBS(OXZ)诱导肠炎模型组、预先感染T.spiralis后诱导TNBS(OXZ)模型组,每组小鼠取材时保证6只以上。对各组小鼠脾脏淋巴细胞进行分离,采用流式细胞术观察TNBS（OXZ）诱导肠炎模型组和预先感染T.spiralis后诱导TNBS（OXZ）模型组。造模后3 d和7 d脾脏淋巴细胞中Th1/Th2水平的变化。结果：与模型组相比,预先感染T.spiralis后诱导TNBS肠炎第3天脾脏Th1/Th2比值未见明显下降（P>0.05）,于第7天明显降低（P<0.05）。诱导OXZ肠炎模型后第3天及第7天小鼠脾脏Th1/Th2比值均明显低于T.spiralis干预组（P<0.05）。结论：针对TNBS 肠炎模型,T.spiralis可能是通过诱导Th2及Tr1型免疫反应抑制模型小鼠过度的Th1型免疫而起到良好的干预作用。在T.spiralis对OXZ模型小鼠的干预性研究中,并无T.spiralis感染诱发的Th2型炎症反应加重同样以Th2升高为主的OXZ模型小鼠的病情。     

中药对过敏性哮喘大鼠模型Th1/Th2型细胞因子的影响

目的:探讨中药治疗对哮喘大鼠IL- 4 mRNA和IFN-γ mRNA表达及IgE含量的影响.方法:24只Wistar大鼠, 随机分为中药治疗组、空白对照组和哮喘模型组, 利用卵白蛋白(OVA)及氢氧化铝制作大鼠哮喘模型, 在雾化激发期, 中药组用杏仁、甘草等中药制成的溶液雾化大鼠, 其余组用生理盐水代替.采用免疫放射法、逆转录聚合酶链反应(RT-PCR)半定量法分别检测各组大鼠血清和肺泡灌洗液(BALF)中免疫球蛋白E(IgE)含量以及肺组织IL- 4 mRNA和IFN-γ mRNA表达.结果:与空白对照组比较, 模型组大鼠IgE含量和IL- 4 mRNA的表达明显升高(P<0.05).与模型组比较, 中药治疗血清IgE的含量和IL- 4 mRNA的表达明显降低(P<0.05), 而IFN-γ mRNA表达则升高(P<0.05).结论:IL- 4可能参与哮喘的发生, 而中药治疗可通过抑制IL- 4 mRNA和上调IFN-γ mRNA的合成, 改善哮喘炎症状态.     

苦参素对HBsAg转基因小鼠血清Th1和Th2细胞因子水平的影响

目的　探讨苦参素对HBsAg转基因小鼠外周血Th1 Th2细胞因子水平的影响。方法　HBsAg转基因小鼠分成苦参素组和对照组 ,分别每天腹腔注射苦参素注射液 2 0 0mg kg 0 2ml和生理盐水 0 2ml,共 30d。处理前后 ,检测外周血清细胞因子水平。结果　对照组处理前后γ 干扰素(IFN γ)与白细胞介素 4 (IL 4 )水平差异无显著意义 ;苦参素组处理前后IFN γ分别为 (3 10 8± 3 172 )pg ml和 (11 0 5 9± 6 971)pg ml,IL 4分别为 (2 9 0 4 5± 13 2 35 )pg ml和 (13 0 2 4± 9 0 0 2 )pg ml(均P <0 0 0 1)。处理后对照组与苦参素组IL 2分别为 (1 0 70± 0 4 4 7)pg ml和 (5 5 37± 2 887)pg ml(P <0 0 0 0 1) ;IL 10分别为 (97 2 2 6± 73 30 6 )pg ml和 (33 6 0 7± 2 3 15 4 )pg ml(P <0 0 1)。结论　在苦参素作用后 ,HBsAg转基因小鼠体内的Th1型细胞因子明显升高 ,Th2型细胞因子明显降低。这将有助于研究苦参素临床治疗乙型肝炎的机制。     

Interleukin-12/T cell stimulating factor,a cytokine with multiple effects on T helper type 1 (Th1) but not on Th2 cells

At least two subsets of CD4⁺ T helper cell lymphocytes termed T_h1 and T _h, 2 exist in the mouse and probably in humans. They are characterized by the secretion of different lymphokines and by their functional behavior. Dysregulated expansion of one or the other subset may be one reason for the development of certain diseases. Thus, it is of importance to define the signals involved in the differentiation and activation of the two T_h cell subsets. It is known and has been confirmed in this report that the cytokine interleukin (IL)-1 acts onT_h2 cells but not on T_h1 cells. We now report that a previously identified cytokine which was provisionally termed T cell stimulating factor is identical with IL-12 and exhibits a reciprocal behaviour to IL-1. IL-12 has several effects on T_h1 cells. It can induce the proliferation of certain T_h1 cells in combination with IL-2. Synthesis of interferon (IFN)-γ by T_h1 cells can be triggered by IL-2 plus IL-12. In contrast to the IFN-γ production observed after T cell receptor (TcR) CD3 stimulation of T_h1 cells with lectin Concanavalin A the IFN-γ production induced by IL-12+IL-2 is insensitive to the immunosuppressive drug cyclosporin A. Furthermore, IL-12 enhances the TcR/CD3-induced synthesis of IFN-γ of several T_h1 clones. Finally, IL-12 (+ IL-2) induces homotypic cell aggregation of T_h1 clones. This type of cell aggregation depends on the participation of LFA-1 and ICAM-1 molecules. In all activation systems with T_h1 cells no effect of IL-1 was demonstrable. In contrast, only IL-1 but not IL-12 served as a co-stimulatory signal for several T_h2 cell lines activated via the TcR/CD3 complex.     

Relationship between Th1/Th2 cytokine patterns and the arthritogenic response in collagen-induced arthritis

It is hypothesized that the balance of cytokines produced by Th1/Th2 subsets of T helper cells plays an important role in the development of autoimmune diseases. Murine collagen-induced arthritis (CIA) is an example of an autoimmune disease in which immunization with cartilage-derived type II collagen induces, firstly, a T cell response to type II collagen and, secondly, the manifestation of a destructive inflammatory response in affected joints. We have investigated the role of Th1/Th2 responses in the development of CIA by monitoring levels of interferon (IFN)-γ (a Th1 cytokine) and interleukin (IL)-4 and IL-10 (Th2 cytokines), and IL-1β and tumor necrosis factor (TNF) (pro-inflammatory cytokines) produced by cultured draining lymph node cells (LNC) from collagen-immunized DBA/1 mice during the induction phase of arthritis and throughout the time of clinical manifestation and subsequent remission of the disease. Although a transient increase in IL-10 was detected 3 days after immunization, Th2 cytokine production was found to be almost completely suppressed 6 days after immunization. In contrast, IFN-γ was detected in LNC cultures as early as 6 days after immunization and the addition of type II collagen to the culture medium resulted in an approximately 10-fold increase in IFN-γ production, indicating that a predominantly Th1 response had become established by this time. IFN-γ production by LNC was found to be further increased at the time of clinical manifestation of arthritis and could be up-regulated by co-culture with type II collagen. IL-10 was not detected in LNC cultures at the onset of arthritis and IL-4, although present, was found to be markedly suppressed in LNC cultures containing type II collagen. These findings indicate that Th1 responses are predominant at the time of onset of arthritis and that the activation of collagen-specific Th1 cells may result in suppression of Th2 activity. IFN-γ production declined progressively during the progression and subsequent remission of arthritis whereas levels of IL-10 increased and low, though persistent, levels of IL-4 were detected throughout this period. High levels of IL-1β and TNF-α production were detected at the onset of the disease. The role of Th1 responses in the development of CIA was further emphasized by the observation that immunization of mice with type II collagen in incomplete Freund's adjuvant, which normally fails to induce arthritis, resulted in a predominantly Th2 cytokine profile.     

Plasma levels of Th1/Th2 type cytokine are associated with change of prolactin and GH/IGF-I in hemodialysis patients

Patients undergoing chronic hemodialysis (HD) have an impaired immune system involving both B and T cell-mediated immune responses. Since T helper type 1 (Th1) and type 2 (Th2) cytokines are implicated in regulating the immune responses, while the pituitary hormones, prolactin (PRL) and growth hormone (GH) are known to be involved in the regulation of the immune response, all of them may, therefore, be involved in impaired status. The aims of the present study were to estimate the serum concentrations of Th1-Th2 cytokine, GH, insulin-like growth factor-I (IGF-I) and PRL, and to determine whether there are any correlations between the release of T-cell cytokines and disturbance of hormones in a group of patients on maintenance hemodialysis (MHD). The study included 35 HD patients (23 males and 12 females, mean age 56.8+/-12.8 years) and a control group of 20 age-matched healthy subjects. Baseline serum concentrations of GH/IGF-I, PRL, IL-2, sIL-2R, IFN-gamma, IL-4 and IL-10 were measured in all patients and control subjects. Our results demonstrate that the fasting serum concentration of IGF-I, PRL, sIL-2R and Th1-type cytokine, including IL-2 and IFN-gamma, were significantly higher in HD patients compared to the healthy subjects. GH and Th2-type cytokine including IL-4 and IL-10 levels were slightly reduced, but no significant differences were observed between HD patients and the control group. In the group of HD patients, PRL correlated directly with IFN-gamma and correlated inversely with IL-10; IFN-gamma correlated inversely with IL-4; and GH also correlated inversely with IGF-I and IL-4. However, IGF-I correlated directly with IL-2 and IL-10. These data suggest that the Th1/Th2 imbalance in HD patients with an increase of Th1 type cytokines, associated with the altered GH/IGF-I axis and prolactin and immuno-endocrine dysfunction, probably plays a role in an impaired immune system in HD patients.     

CpG ODN对rHBsAg免疫小鼠Th1/Th2型免疫应答的影响

目的：初步探讨CpC寡脱氧核苷酸(CpG ODN)与重组乙型肝炎表面抗原(rHBsAg)联合免疫小鼠的Th1／Th2型免疫应答效应。方法：BALB／c小鼠经后腿胫骨前肌免疫2次，ELISA法检测血清乙型肝炎表面抗体(抗-HBs)IgG亚类IgG2a/IgG1的比值；生物活性法检测脾细胞诱生上清中的IFN-γ和IL-2含量；ABC-ELISA法检测小鼠血清中IL-4、IL-10及IL-12含量。结果：加CpG ODN组与单独注射rHBsAg组相比：抗-HBs IgG亚类IgG2a／IgG1比值明显高；Th1型细胞因子IFN-γ和IL-2的表达增强，抑制Th2型细胞因子IL-4和IL-10的产生。结论：CpCODN能够明显增强rHBsAg免疫小鼠Th1型抗体亚类IgG2a的产生，并且诱导Th1型细胞因子的表达，抑制Th2型细胞因子的表达。     

黄芪注射液对NOD小鼠CD4~+CD25~+CD127~(-/low)调节性T细胞的影响

目的通过对NOD小鼠应用大剂量的黄芪注射液,观察黄芪对于CD~4+CD25~+CD127~-调节性T细胞及相关细胞因子的影响情况。方法随机将20只NOD小鼠分成4组,每组5只,分别给予生理盐水、环磷酰胺注射液、黄芪注射液、黄芪联合环磷酰胺注射液各0.6 ml,连续给药2周后,取小鼠脾脏制成脾细胞悬液上流式细胞仪检测CD4~+CD25~+CD127~(-/low)调节性T细胞水平,取小鼠外周血采用酶联免疫吸附实验法(ELISA)、检测小鼠血液中的IL-10、IL-6的变化情况。结果调节性T细胞的检测结果为黄芪注射液组及联合用药组较空白对照组和环磷酰胺组有显著差别(P<0.05),而环磷酰胺组与空白对照组比较没有显著差别(P>0.05)。IL-10的检测结果为,黄芪注射液组与联合用药组较空白对照组和环磷酰胺组有统计学意义(P<0.05)。IL-6的检测结果为,其余3组均与空白对照组比较明显降低IL-6的含量(P<0.05)。结论大剂量的黄芪注射液产生免疫调节作用,可能是通过提高Treg细胞的水平而达到抑制自身反应性T细胞的增殖和分化,以及同时提高细胞因子IL-10的水平,降低IL-6的水平,抑制炎症反应,共同达到...     

安脑片对aGVHD小鼠Th1/Th2细胞的调节作用

目的:观察中药安脑片对aGVHD小鼠的Th1/Th2细胞的调节作用。方法:清洁级BALB/c雄性小鼠作为供鼠,以清洁级C57BL/6雌性小鼠为受鼠,建立aGVHD模型;C57BL/6小鼠在移植前进行60Co全身照射,剂量为9.0 Gy,照射后4小时内尾静脉输注BALB/c雄性小鼠的骨髓细胞8×107个/只+脾细胞8×107个/只。造模成功后,随机分为安脑片组和空白组。移植后第30天杀鼠取材,取眶静脉血并制备肝脏标本,ELISA法检测小鼠血清IFN-γ及IL-10水平,免疫组化法检测肝脏组织IFN-γ及IL-10的阳性表达。结果:安脑片组小鼠血清IFN-γ的表达治疗前为(9.67±0.88)pg/ml,治疗后降至(4.81±0.87)pg/ml,IL-10的表达在治疗前为(3.81±0.55)pg/ml,治疗后升至(8.16±0.92)pg/ml。免疫组化的结果也显示小鼠肝脏组织IFN-γ及IL-10的表达改善明显,治疗后小鼠IFN-γ的表达评分降为1.27±0.46,IL-10的表达评分升至3.73±0.46,与治疗前相比差异显著(P=0.000)。结论:安脑片可有效改善小鼠aGVHD效应并调节Th1/Th2细胞因子的平衡。     

The anti-allergic effects of lactic acid bacteria are strain dependent and mediated by effects on both Th1/Th2 cytokine expression and balance

BACKGROUND: There is growing interest in the immune-stimulating effect and in particular, the anti-allergic effect, of lactic acid bacteria (LAB). However, no comprehensive studies have been done that compare the immune-stimulating potential of LAB strains. METHODS: The in vitro immune-stimulating effects on Th1/Th2 balance of more than 100 LAB strains were compared in splenocytes from ovalbumin-sensitized Th2-polarized mice. The in vivo anti-allergic ability of strain KW3110 was studied in the Th2-polarized model by detecting serum IgE concentration, Th1/Th2 cytokine secretion from splenocytes, and the expression of co-stimulatory molecules on macrophages. RESULTS: In vitro studies from Th2-polarized splenocytes, using IL-12 as a Th1 parameter and IL-4 secretion as a Th2 parameter revealed a wide variety of IL-12-inducing and IL-4-repressing activities, depending on the strain of LAB, not depending on the species. However, evaluation of individual strains in vivo revealed that after exposure to Lactobacillus paracasei KW3110 strain, the serum IgE elevation elicited by repeated OVA injection of mice was strongly inhibited. Cytokine secretion from splenocytes 20 weeks after KW3110 administration showed increased IL-12 and decreased IL-4 expression. Both CD40 and B7-1 expression on macrophages was upregulated by administration of KW3110. CONCLUSIONS: Improving the consequences of the Th1/Th2 imbalance by administration of LAB was dependent upon the LAB strain rather than the LAB species. Oral KW3110 administration in the mouse allergy model directed the Th1/Th2 balance toward Th1 through the maturation of APCs and inhibition of serum IgE elevation.