耻垢分枝杆菌作为免疫调节剂的研究

目的 探讨耻垢分枝杆菌制剂对不同免疫状态动物的免疫调节作用.方法 注射环磷酰胺建立免疫功能低下的动物模型,以结核分枝杆菌感染（早期）或猪血清致敏建立免疫功能亢进的动物模型,然后将耻垢分枝杆菌制剂分别注射于正常、免疫功能低下和免疫功能亢进的动物,研究耻垢分枝杆菌制剂对不同模型动物T淋巴细胞增殖反应、迟发型超敏反应或速发型超敏反应的影响.结果 耻垢分枝杆菌制剂可增强正常动物的T淋巴细胞增殖反应和迟发型超敏反应,促进免疫功能低下小鼠T淋巴细胞增殖功能的恢复,抑制免疫功能亢进豚鼠的迟发型超敏反应和猪血清致敏小鼠的速发型超敏反应.结论 耻垢分枝杆菌制剂具有双向免疫调节作用.     

蛤蟆草对巨噬细胞炎症因子分泌的影响及免疫调节作用研究

目的研究蛤蟆草对巨噬细胞多种炎症因子的影响及免疫调节作用。方法通过小鼠血凝抗体滴度检测,考察蛤蟆草乙酸乙酯提取物对体液免疫的作用;通过小鼠迟发型超敏反应试验,考察对细胞免疫的作用;体外试验用ELISA法检测LPS诱导的小鼠巨噬细胞分泌TNF-α、IL-6和NO水平;MTT法检测脾淋巴细胞增殖;Western blot检测磷酸化NF-κB的水平。结果在体试验结果表明蛤蟆草提取物对小鼠体液血凝抗体生成和迟发型超敏反应均具有抑制作用,离体试验也显示其对T淋巴细胞和B淋巴细胞均具有抑制作用。与阴性对照组相比,蛤蟆草组LPS诱导的小鼠巨噬细胞分泌TNF-α、IL-6和NO的水平显著降低,且呈明显的剂量依赖关系。此外,蛤蟆草组磷酸化NF-κB表达水平显著降低。结论蛤蟆草乙酸乙酯提取物对小鼠体液免疫和细胞免疫均具有抑制作用,对TNF-α、IL-6和NO等促炎性细胞因子分泌水平的抑制作用可能是通过抑制NF-κB(p65)的磷酸化所致。     

Fas及FasL和Caspase-3在青蒿琥酯诱导人胚肺成纤维细胞凋亡中的表达

背景:青蒿琥酯具有减轻肺纤维化的作用,但相关机制的研究罕见报道。 目的：探讨青蒿琥酯对人胚肺成纤维细胞凋亡的作用及其与Fas,FasL,Caspase-3表达的关系。 方法：用1,10,100 mg/L青蒿琥酯分别干预体外培养的人胚肺成纤维细胞。采用CCK-8法检测青蒿琥酯对人胚肺成纤维细胞增殖的影响,流式细胞术测定细胞凋亡率,RT-PCR法测定Fas,FasL,Caspase-3 的mRNA的表达。 结果与结论：青蒿琥酯呈浓度依赖性抑制人胚肺成纤维细胞增殖,细胞经青蒿琥酯作用后凋亡率明显增加(P  < 0.05或P  < 0.01),Fas,FasL,Caspase-3 mRNA的表达显著高于对照组(P < 0.05)。结果证实,青蒿琥酯可通过上调Fas,FasL,Caspase-3 mRNA的表达抑制人胚肺成纤维细胞增殖、并促进细胞凋亡,发挥抗肺纤维化作用。     

青蒿琥酯对吉西他滨体外抗胰腺癌活性的作用

目的:探讨青蒿琥酯辅助治疗对吉西他滨抗胰腺癌活性的影响和机制。方法:分别采用分子克隆及RNA干扰方法于人胰腺癌细胞Capan-2中过表达和干扰鼠双微体蛋白2(MDM2),MTT实验检测p53野生型胰腺癌细胞系Capan-2的细胞活力。Western blot实验检测Capan-2细胞中MDM2、p53、Noxa和Puma的表达水平,细胞色素C和凋亡诱导因子的释放,以及caspase-9和caspase-3的活化。流式细胞术检测Capan-2细胞的线粒体膜电位和凋亡水平。结果:吉西他滨联合青蒿琥酯组Capan-2的相对细胞活力显著低于吉西他滨单处理组(P 0. 05)。青蒿琥酯处理显著抑制Capan-2细胞中MDM2的表达水平(P 0. 05)。吉西他滨联合青蒿琥酯组的p53、Noxa及Puma表达水平均明显高于吉西他滨单处理组(P 0. 05)。青蒿琥酯明显促进吉西他滨依赖的Capan-2细胞线粒体膜电位的下降,细胞色素C和凋亡诱导因子的释放,caspase-9和caspase-3的活化,以及凋亡的发生。转染MDM2表达质粒后,青蒿琥酯联合吉西他滨对Capan-2细胞的凋亡诱导途径受到显著抑制。结论:青蒿琥酯通过MDM2/p53途径提高吉西他滨的抗胰腺癌活性。     

下调Notch3对小鼠T淋巴细胞体外活化增殖及NF-κB的影响

研究siRNA下调Notch3对小鼠T淋巴细胞体外增殖的影响,并初步探讨其免疫调节机制。从小鼠脾脏分离制备T淋巴细胞悬液;将化学合成的靶向Notch3基因的siRNA在Lipofectamine 2000介导下转染小鼠淋巴细胞;通过Westernblot检测各组细胞中Notch3蛋白水平的变化;以不同浓度的Notch3 siRNA作用于该小鼠T淋巴细胞模型,流式细胞术检测CD3~+T细胞早期活化标志CD69分子的表达;MTT检测Notch3-siRNA对小鼠淋巴细胞增殖的抑制作用;EMSA检测NF-κB活性。在淋巴细胞体外培养试验中,转染Notch3 siRNA可以明显降低小鼠淋巴细胞内Notch3的表达,下调Notch3可以显著抑制刀豆蛋白A(ConA)诱导的T细胞CD69的表达;同时下调Notch3对小鼠淋巴细胞的增殖有抑制作用;而且发现下调Notch3能明显抑制ConA诱导的NF-κB活化。实验结果提示,下调Notch3信号可通过抑制NF-κB活化对小鼠T淋巴细胞活化与增殖发挥抑制作用。     

Rho激酶抑制剂Y-27632对MRL/lpr狼疮小鼠的保护作用北大核心CSCD

目的探讨Rho激酶抑制剂Y-27632对MRL/lpr狼疮小鼠的保护作用机制。方法 MRL/lpr狼疮小鼠20只随机分为MRL/lpr对照组、5 mg/kg Y-27632处理组,每组10只;野生型对照组C57BL/6小鼠10只。采用ELISA检测各组小鼠血清、脾脏组织中超氧化物歧化酶(SOD)、丙二醛(MDA)水平,ELISA检测血清核因子κB(NF-κB)相关炎症因子白细胞介素6(IL-6)、IL-1β、肿瘤坏死因子α(TNF-α)含量;采用Western blot法检测各组小鼠脾脏组织中硫氧还蛋白结合蛋白(Txnip)/硫氧还蛋白(Trx)、丝裂原激活蛋白激酶(MAPK)相关蛋白胞外信号调节激酶(ERK)、c-Jun氨基末端激酶(JNK)和p38MAPK以及NF-κB的水平;Western blot法检测各组小鼠脾脏T淋巴细胞Txnip、p38MAPK、NF-κB蛋白水平;ELISA检测T淋巴细胞上清液IL-6、IL-1β、TNF-α水平。结果 Y-27632提高MRL/lpr狼疮小鼠血清及脾脏组织SOD水平;降低血清及脾脏组织MDA水平;降低血清、脾脏组织和脾脏T淋巴细胞上清液IL-6、IL-1β、TNF-α水平;抑制脾脏和脾脏T淋巴细胞Txnip、MAPK相关蛋白ERK、JNK和p38MAPK以及NF-κB表达,增加Trx含量。结论 Rho激酶抑制剂Y-27632对MRL/lpr狼疮小鼠有保护作用。     

青蒿琥酯通过增加活性氧簇生成诱导人肝癌HepG2细胞凋亡

目的:探讨青蒿琥酯诱导人肝癌Hep G2细胞凋亡的机制及活性氧簇(ROS)在青蒿琥酯诱导Hep G2细胞凋亡中的作用。方法:采用MTT法观查青蒿琥酯对人肝癌Hep G2细胞存活的影响,Hoechst 33258荧光染色法观察细胞凋亡形态的变化,流式细胞术检测Hep G2细胞的凋亡率,DCFH-DA检测细胞凋亡过程中ROS的变化。Western blot检测细胞内凋亡相关蛋白Bax、Bcl-2、cleaved caspase-3和细胞色素C(Cyt C)蛋白水平的变化。采用NADPH氧化酶抑制剂夹竹桃麻素(apocynin)预处理Hep G2细胞,Western blot检测NADPH氧化酶亚基p47~(phox)和p22~(phox)蛋白表达水平,流式细胞术检测ROS变化。结果:与对照组相比,青蒿琥酯作用于Hep G2细胞24 h后,细胞存活率明显减少(P0.05);细胞核呈致密浓染色,细胞凋亡比例升高(P0.05);ROS明显升高(P0.05);Western blot结果显示,青蒿琥酯作用后细胞内Bcl-2蛋白表达下调,Bax蛋白表达上调,Bax/Bcl-2蛋白表达比例升高,cleaved caspase-3和Cyt C蛋白水平升高。Apocynin预处理能降低青蒿琥酯给药组细胞内p47~(phox)和p22~(phox)蛋白表达及ROS的生成。结论:青蒿琥酯能诱导Hep G2细胞凋亡,其凋亡过程可能与ROS的生成增加相关。     

诱导细胞凋亡青蒿琥酯抗食管癌作用机制研究

 [摘要] 目的 研究青蒿琥酯诱导食管癌细胞凋亡作用及探讨青蒿琥酯抗食管癌作用机制。方法 不同浓度的青蒿琥酯(Artesunate, Art)(0、10、20、40μg/ml) 作用Eca109细胞24h,流式细胞术（Flow cytometry, FCM）方法检测细胞凋亡、周期及细胞中bcl-2和bax蛋白的表达量。结果 青蒿琥酯作用Eca109细胞24h后,与对照组相比,细胞凋亡率显著增高P<0.05,且具有剂量依赖性。青蒿琥酯组与对照组相比,Eca109细胞中bcl-2蛋白表达水平及细胞增殖指数显著降低P<0.05,而bax蛋白表达量显著增高P<0.05,且具有剂量依赖性。结论 青蒿琥酯可以通过调节Eca109细胞中bcl-2、bax蛋白表达水平和细胞增殖,从而诱导Eca109细胞产生凋亡,起到抗食管癌作用。     

胞质转导肽-HBcAg18-27-Tapasin诱导C57BL/6小鼠T淋巴细胞分泌Th1型细胞因子及HBV特异性CTL的表达

目的 观察融合蛋白胞质转导肽(CTP)-HBcAg18-27-Tapasin诱导C57BL/6小鼠T淋巴细胞分泌Th1型细胞因子及HBV特异性细胞毒T淋巴细胞(CTL)的表达.方法 C57BL/6小鼠随机分为实验组CTP-HBcAg18-27-Tapasin、对照组CTPHBcAg18-27、HBcAg18-27-Tapasin及空白组(生理盐水).经肌肉免疫小鼠,ELISA检测T淋巴细胞分泌细胞因子;流式细胞术(FCM)检测T淋巴细胞内的细胞因子;CCK-8法检测T淋巴细胞增殖活性.结果 实验组能有效刺激小鼠T细胞分泌Th1型细胞因子;FCM检测实验组融合蛋白诱导的CTL水平明显高于其他组;且实验组T淋巴细胞增殖活性明显高于对照组及空白组.结论 CTP-HBcAg18-27-Tapasin融合蛋白免疫C57BL/6小鼠后,能提高T淋巴细胞增殖活性,能有效刺激T淋巴细胞分泌Th1型细胞因子及增加CTLs的表达.     

青蒿琥酯对人骨髓瘤细胞抗血管生成的作用

目的:研究青蒿琥酯对人RPMI-8226细胞诱导血管新生的抑制作用。方法:采用MTT法检测青蒿琥酯对RPMI-8226细胞增殖抑制作用;通过鸡胚绒毛尿囊膜体内血管生长实验,观察青蒿琥酯对RPMI-8226细胞诱导体内血管生成的影响;免疫蛋白印迹检测鸡胚绒毛尿囊膜内血管内皮生长因子(VEGF)和血管紧张素1(Ang-1)含量的表达变化。结果:青蒿琥酯以时间、剂量依赖方式抑制RPMI-8226细胞增殖;24h和48h后,其IC50值分别为(36.33±2.65)μmol/L和(14.31±3.28)μmol/L。在鸡胚绒毛尿囊膜体内血管生长实验中,经3、6、12μmol/L青蒿琥酯处理后,与单纯RPMI-8226细胞组比较,新生血管数目分别减少21.9%、38.2%和76.9%,差异有统计学意义;同时鸡胚绒毛尿囊膜内VEGF含量分别显著下降22.2%、34.2%和52.6%;Ang-1蛋白表达量分别显著下降15.6%、24.2%和39.6%。结论:青蒿琥酯具有抑制RPMI-8226细胞诱导血管新生的作用,其作用机制与下调RPMI-8226细胞的VEGF和Ang-1表达有关。     

p38 MAPK的活化促进小鼠T细胞增殖

研究p38丝裂原活化蛋白激酶(MAPK)在小鼠T细胞增殖中的作用。以活体染料羧基荧光素乙酰乙酸琥珀酰亚胺酯染色,通过流式细胞术分析p38 MAPK的特异性抑制剂SB203580和p38 MAPK的激活剂茴香霉素在不同剂量下对ConA刺激的T细胞增殖作用,并测定其增殖的相关指数;采用碘化丙锭染色分析SB203580和茴香霉素对ConA或佛波醇酯(PDB)加离子霉素(Ion)刺激的小鼠T细胞周期变化的影响。结果显示:0.5μmol/L～15.0μmol/L SB203580对ConA诱导的T细胞增殖有明显的抑制作用,呈剂量依赖关系(r=-0.97,P<0.01);该浓度范围的SB203580能够呈明显剂量依赖性地阻止ConA或PDB加Ion诱导的T细胞进入S期或G2/M期(r_s=-0.98,P<0.01;r_(G2)/M=-0.97,P<0.01)。茴香霉素浓度在0.01～0.5ng/ml时能够增强ConA对T细胞的促增殖作用,并能够促进ConA诱导的T细胞进入G2/M期,促进PDB加Ion诱导的T细胞进入S期。以上提示p38信号通路的活化在促进小鼠T细胞增殖中可能起着重要作用。     

Gamma-irradiated scrub typhus immunogens: development of cell-mediated immunity after vaccination of inbred mice.

Mice immunized with three injections of gamma-irradiated Karp strain of Rickettsia tsutsugamushi were evaluated for the presence of cell-mediated immunity by using delayed-type hypersensitivity, antigen-induced lymphocyte proliferation, and antigen-induced lymphokine production. These animals also were evaluated for levels of circulating antibody after immunization as well as for the presence of rickettsemia after intraperitoneal challenge with viable Karp rickettsiae. After immunization with irradiated Karp rickettsiae, a demonstrable cell-mediated immunity was present as evidenced by delayed-type hypersensitivity responsiveness, lymphocyte proliferation, and production of migration inhibition factor and interferon by immune spleen lymphocytes. Also, a reduction in circulating rickettsiae was seen in mice immunized with irradiated rickettsiae after challenge with 1,000 50% mouse lethal doses of viable, homologous rickettsiae. All responses except antibody titer and reduction of rickettsemia were similar to the responses noted in mice immunized with viable organisms. Antibody levels were lower in mice immunized with irradiated rickettsiae than in mice immunized with viable rickettsiae. Furthermore, mice that were immunized with viable rickettsiae demonstrated markedly lower levels of rickettsemia after intraperitoneal challenge compared with either mice immunized with irradiated rickettsiae or nonimmunized mice.     

Tolerance and immunity in mice infected with herpes simplex virus: studies on the mechanism of tolerance to delayed-type hypersensitivity

Tolerance to delayed-type hypersensitivity is produced in mice following an intravenous injection of herpes simplex virus. This form of tolerance is produced early on, following simultaneous injections of virus subcutaneously and intravenously, and is long lasting (greater than 100 days). The early tolerance mechanism is resistant to high doses of cyclophosphamide and is not transferable by serum or spleen cells taken after 7 days. However, spleen cells taken at 14 days onwards inhibit the induction of delayed hypersensitivity when transferred to normal syngeneic recipients. These cells are T lymphocytes and are specific for the herpes type used in the induction.     

迟发型超敏反应中小鼠脾淋巴细胞与细胞外基质粘附能力的变化

目的:探讨迟发型超敏反应中淋巴细胞与细胞外基质粘附能力的变化及细胞因子的调节作用。方法: 以2, 4, 6-三硝基氯苯(picrylchloride, PCl)两次致敏小鼠后, 在耳部攻击造成超敏反应。取攻击后不同时间点的脾淋巴细胞, 以Mn²⁺为诱发剂, 检测细胞与细胞外基质蛋白的粘附活性变化;或取攻击后18h的脾淋巴细胞, 分别在体外与IL-2, IFN-γ, TNF-α单独或联合培养4h后, 检测细胞与细胞外基质的粘附作用;将脾淋巴细胞纯化为T细胞后, 检测TNF-α对其粘附能力的影响。结果:脾淋巴细胞与细胞外基质的粘附能力在攻击后6h时开始上升, 18h达到高峰, 之后下降, 在36h基本恢复正常水平。IL-2在10×10⁴U/L显著促进脾淋巴细胞的粘附, TNF-α剂量依赖性地促进脾淋巴细胞的粘附, IFN-γ对TNF-α的作用具有明显的协同效应。TNF-α对脾T细胞粘附能力的促进作用强于对总脾淋巴细胞的作用。结论:迟发型超敏反应中, T淋巴细胞与细胞外基质的粘附随炎症的进展发生相应的变化, 这种粘附作用受各种细胞因子的调节。     

Induction of suppressor T cells for lymph node cell proliferation after contact sensitization of mice with a poison oak urushiol component.

Contact sensitivity with properties of delayed-type hypersensitivity (DTH) can be induced in mice by 3-heptadecylcatechol (HDC, a component of poison oak urushiol oil). Sensitization is effected by painting on abdominal skin and is assessed by measuring ear swelling produced after ear challenge. Further studies on the nature of this sensitization were made by monitoring the induction of lymph node cell (LNC) proliferation (as indicated by increased in vitro uptake of [14C]-thymidine into DNA) after cutaneous treatment with HDC. Draining inguinal LNC proliferation peaked 5-6 days after abdominal application of HDC. LNC taken from sensitized mice at times later than this peak suppressed HDC-induced proliferation when transferred into recipient mice. Such suppressor cells were T lymphocytes as implied by their sensitivity to anti-Thy-1.2 antibody and complement. The suppressive effect appeared to have both specific and non-specific components. LNC containing these T suppressor cells could not suppress the optimal proliferation in vitro of previously sensitized cells, nor was suppressive activity observed against the induction of contact sensitization itself. Thus, although the suppressor cells appeared to act on the afferent phase of sensitization, they may not be directed against the effector cells of DTH.     

In vitro responses of spleen cells from Trichinella spiralis-infected mice

The in vitro cellular immune responses of spleen cells from mice infected with Trichinella spiralis and immunized with BCG have been investigated. ICR/CD-1 mice were originally infected with 200 T. spiralis larvae 22 days prior to infection with 4 X 10(6) viable or heat-killed mycobacteria. Analysis of the splenic cell populations indicated that significant increases in adherent cells (macrophages) were noted only in groups previously infected with the nematode; the concentration of non-adherent cells (lymphocytes) did not vary insignificantly among any of the experimental groups. Assay of blast cell transformation and 3H-thymidine incorporation demonstrated the ability of T. spiralis infection to potentiate in vitro cellular immune reactions. These findings support earlier in vivo studies concerning nematode-induced immunopotentiation of delayed-type hypersensitivity reactions, and provide additional evidence that infection with this nematode enhances the immune capabilities of both stimulated lymphocytes and nonspecific phagocytic cells.     

MTT法与流式细胞术检测肺炎合剂促进T淋巴细胞转化的实验研究

目的：探讨肺炎合剂对小鼠T淋巴细胞转化的影响，并试图为药研究淋巴细胞转化提供检测方法依据。方法：通过病毒性肺炎患儿淋巴细胞转化率降低的机体，用氢化可的松建立免疫低下小鼠模型，以不同剂量药液灌胃给药后，采用MTTI法和流式细胞仪检测法对比观察肺炎合剂对ConA诱导的小鼠脾T淋巴细胞转化的作用。结果：肺炎合剂使正常和免疫低下小鼠脾T淋巴细胞增殖能力显著增强。结论：肺炎合剂对小鼠脾T淋巴细胞增反应的促进作用，可能是该药作用机理之一。并认为流式细胞术是测定淋巴细胞转化的一种准确而可靠的方法。     

Role of specific delayed-type hypersensitivity in Pseudomonas aeruginosa-infected mice

The role of specific cell-mediated immunity was studied in mice injected in the hind footpad with viable Pseudomonas aeruginosa cells. The results reported here show that a state of specific delayed-type hypersensitivity, evaluated both as footpad swelling and as weight increase of popliteal lymph node, occurs in P. aeruginosa-infected mice. Furthermore, a T-cell-enriched spleen population from infected animals was able to transfer delayed hypersensitivity to normal recipients. However, identity at the major histocompatibility complex to transfer delayed hypersensitivity was required. Acquired cellular resistance was not transferred to normal recipients by immune T lymphocytes. On the contrary, mice receiving immune T cells showed an increase in the severity of the lesion caused by a viable challenge. The dichotomy between acquired cellular resistance and delayed hypersensitivity, and the possibility that T-cell reactivity to P. aeruginosa may be actively controlled, is discussed.     

三种赤灵芝粉对免疫抑制模型小鼠免疫功能的调节作用

目的:为了探讨灵芝调节机体免疫功能的作用机制,并寻找出一种能有效改善机体免疫功能的灵芝制剂,本文研究了三种赤灵芝粉对免疫抑制小鼠免疫功能的调节作用。方法:实验动物随机分为5组(Ⅰ～Ⅴ组),Ⅱ～Ⅴ组采用腹腔注射环磷酰胺(CTX)70 mg.kg-1.bw-1,隔日注射,共4次,以制备动物模型,Ⅰ组注射等体积生理盐水。Ⅲ～Ⅴ组于注射CTX次日及末次注射CTX后11日内分别灌胃给予赤灵芝破壁孢子粉(D1)、赤灵芝孢子粉(D2)和赤灵芝精粉(D3)(1g.kg-1.bw-1),定期监测小鼠体重;给药后无菌取脾脏称重,计算脾指数;采用小鼠腹腔巨噬细胞吞噬鸡红细胞试验检测巨噬细胞吞噬功能;采用NK细胞介导的细胞毒试验检测NK细胞功能;采用淋巴细胞转化试验检测T、B淋巴细胞功能;采用流式细胞术检测CD4+T及CD8+T细胞比例。结果:与免疫抑制组相比,小鼠给予灵芝粉后,三组小鼠体重均升高(P<0.05);D3组脾指数降低;D1和D2组小鼠的腹腔巨噬细胞吞噬指数较免疫抑制组升高(P<0.05);三组小鼠NK细胞杀伤活性无明显变化;脾脏T、B淋巴细胞增殖能力无明显变化;D3组小鼠脾脏CD4+和CD8+T细胞比例明显升高,特别是CD4+T细胞升高最为显著且较正常对照高(P<0.05)。结论:三种灵芝对免疫抑制模型小鼠的免疫功能具有调节作用,尤其是赤灵芝精粉具有显著提高CD4+T细胞数量的作用,为其临床应用提供了实验依据。     

Effect of a new antirheumatic drug (CGS10787B) on antibody formation and delayed-type hypersensitivity in BALB/c mice

The effect of CGS10787B on antibody formation and cell-mediated (delayed-type) hypersensitivity in BALB/c mice was examined by using the haemolytic plaque-forming cell assay and the delayed-type footpad reaction with the assay of T-cell subsets. CGS10787B at doses of 5, 25 and 100 mg/kg p.o. enhanced spleen haemolytic plaque-formation on day 4, and spleen rosette-formation on day 5 after immunization. In the assay of T-cell subsets, CGS10787B at the dose of 100 mg/kg reduced the Lyt-23 positive cell subset. In type III hypersensitivity, CGS10787B at doses of 5, 25 and 100 mg/kg p.o. for 6 days reduced dose-relatedly the footpad swelling of the immunized mouse. In type IV hypersensitivity, CGS10787B at doses of 5, 25 and 100 mg/kg p.o. for 6 days diminished dose-dependently the footpad swelling augmented by cyclophosphamide pretreatment. In the assay of T-cell subsets, CGS10787B at doses of 25 and 100 mg/kg increased the Thy-1 positive cell subset. These findings suggest that CGS10787B has an influence on the immune systems, acting on the function of T lymphocytes as well as on the inflammatory process in immunized animals.