肝肺综合征患者外周血单核细胞Toll样受体2和一氧化氮合酶的表达及其意义

目的 探索内毒素(LPS)、Toll样受体2(TLR2)、诱导型一氧化氮合酶(iNOS)在肝肺综合征(HPS)发生发展机制中的作用.方法 将研究对象分为肝肺综合征组(HPS组,31例,其中26例行肝移植术)、非肝肺综合征组(即未合并HPS的终末期肝病组,30例,均行肝移植术)和正常对照组(10名健康志愿者).各组患者分别于术前、术后3、7、14、21、28 d检测外周血LPS、Toll样受体2mRNA(TLB2mRNA)及诱导型一氧化氮合酶mRNA(iNOSmRNA)表达水平,及其肝随移植术后肝功能及低氧血症好转的术后变化.结果 HPS组术前LPS,TLR2mRNA,iNOSmBNA的表达水平较非HPS组高,但差异无统计学意义(P0.05);而HPS组术前LPS,TLR2mRNA,iNOSmRNA的表达均较正常对照组明显升高(P<0.05);非HPS组LPS,TLR2mRNA,iNOSmRNA的表达均较正常对照组高,但差异无统计学意义(P0.05).HPS与非HPS组的终末期肝病患者行肝移植术后,随肝功能的改善,TLR2mRNA表达呈下降趋势,呼吸和血氧饱和度亦逐步改善.结论 终末期肝病肠源性内毒素释放及其导致的TLR2mRNA和iNOSmRNA表达的增高可能是肝肺综合征的重要发病机制.     

Expression of Platelet Membrane Glycoprotein Ib/Ⅸ/Ⅴ Complex,a Receptor of Thrombin,in Patients with Hemorrhagic Thrombopathy

To investigate the role of platelet membrane glycoprotein （GP） Ib/Ⅸ/Ⅴ complex and its subunit GP Ibα in patients with hemorrhagic thrombopathy （HT）, the expressions of GP Ib/Ⅸ/Ⅴ complex and GP Ibα,defined as mean fluorescence intensity （MFI）, were assessed by flow cytometry. The maximum aggregation of platelet was determined by turbidity method. These indicators were compared among 68 HT patients with the presenting complaint of hemorrhage, 33 well-controlled HT patients and 32 normal healthy subjects. The results showed that the MFI of GP Ib/Ⅸ /Ⅴ complex and GP Ibα was markedly lower in HT patients with current hemorrhage than that in the healthy subjects, with difference being statistically significant （P〈0.05）. There was no significant difference in the expressions of GP Ib/ Ⅸ/ Ⅴ complex and GP Ibα between well-controlled HT patients and normal healthy subjects （P〉0.05）. It was concluded that the expression of GP Ib/Ⅸ /Ⅴ complex, the receptor of thrombin and von Willebrand factor, was down-regulated in HT patients with current hemorrhage, which might result in the dysfunction of platelet aggregation and recurrence of HT.     

肝肺综合征大鼠模型肺血管内巨噬细胞iNOS和HO-1的表达

目的探讨肺血管内巨噬细胞(pulmonary intravascular macrophages,PIM)在肝肺综合征(hepatopulmonary syndrome,HPS)发病机制中的作用。方法用随机数字表法将Sprague-Dawley(SD)大鼠随机分为对照组和CCl4组。模型制备后取动脉血作血气分析,即静脉血测内毒素和肝功能。行肝、肺病理检查,取肠系膜淋巴结作细菌培养。大鼠巨噬细胞单抗免疫组化染色观察PIM的黏附、聚集情况。免疫组化染色检测诱导型一氧化氮合酶(iNOS)和血红素氧合酶-1(HO-1)的蛋白表达。SYBR GreenⅠ实时定量PCR方法检测肺组织中iNOS和HO-1的mRNA表达。结果对照组肺泡细胞无变性坏死,肺泡形态正常,无炎性细胞浸润、间质水肿、纤维增生和透明膜形成。CCl4组肺泡毛细血管增生、扩张,肺泡间隔增宽、容量减小。CCl4组PaO2(81.39±2.36)mmHg和PaCO2(30.55±2.87)mmHg较对照组PaO2(98.99±3.41)mmHg和PaCO2(36.26±2.88)mmHg,差异有统计学意义(P<0.05)。CCl4组肺泡-动脉血氧分压(A-aDO2)(30.79±5.73)mmol/L较对照组A-aDO2(3.79±0.86)mmol/L,差异有统计学意义(P<0.05)。CCl4组内毒素(0.30±0.18)ZU/L较对照组内毒素(0.05±0.02)ZU/L,差异有统计学意(P<0.05)。对照组的肠系膜淋巴结培养未见细菌生长,CCl4组肠系膜淋巴结培养阳性率为62.5%。对照组肺血管内无巨噬细胞聚集,CCl4组肺血管内大量巨噬细胞聚集,并且iNOS和HO-1蛋白表达均定位于PIM内。CCl4组iNOS(0.03±0.01)和HO-1(0.16±0.04)的mRNA表达明显高于对照组iNOS(0.01±0.01)和HO-1(0.07±0.05)(P<0.05)。结论PIM黏附、聚集,分泌iNOS和HO-1可能是NO和CO合成增多,是引起HPS的重要因素。     

Measurement of platelet-activating factor in human blood by high performance thin layer chromatography and its clinical application

Summary Platelet-activating factor (PAF) present in the blood of the patients with chronic pulmonary heart disease and asthma has been detected by high performance thin layer chromatography (HPTLC). The patients with chronic pulmonary heart disease accompanied by carbon dioxide retention (PaCO₂>6.67 kPa) have a higher level of PAF in blood (0. 75 ±0. 27 μg/ml) than those who have no carbon dioxide retention (PaCO₂<6.67 kPa, PAF 0.41 ±0. 25 μg/ml) and those in the normal control group (0.45 ±0.20 μg/ml), withP<0.05 in all. The patients with asthma have a higher PAF in blood (0.83±0. 05 μg/ml) than those in the control group (P < 0.005). These findings suggest that PAF plays an important role in episodes of chronic pulmonary heart disease and asthma.     

Expression of the inducible nitric oxide synthase isoform in chorionic villi in the early spontaneous abortion

Causesoftheearlyspontaneousabortionarecomplex,manyofwhichremainunknown.Recent-ly,someimmunologicaladvancesprovidednewper-spectivesforstudyingthemechanismoftheearlyspontaneousabortion.Inthisstudy,weinvestigatedtherelationshipbetweeniNOSandthespontaneousabortion.1MATERIALSANDMETHODS1'1SubjectsTheearlypregnantwomenwereselectedfromtheoutpatientsoftheDepartmentofObstetrics,Xiehe(Union)Hospital.GroupIconsistedof12pa-tientswithspontaneousabortionandgrouplcon-tained30subjectswithoutspontan…     

P-选择素和内皮素-1检测在腹水鉴别诊断中的价值

目的:通过检测不同病因腹水中P-选择素(P-selectin)和内皮素-1(ET-1)的含量,探讨其在鉴别腹水性质中的意义。方法:83例来自临床上已确诊病人的腹水标本,分为3组:结核组(21例),恶性肿瘤组(29)和肝硬化组(33例)。采用酶联免疫吸附法(ELISA)检测P-选择素水平,放免法检测ET-1含量。结果:结核性腹水P-selec-tin水平为(9.27±1.55)ng/L,肿瘤性腹水水平为(4.89±1.38)ng/L,肝硬化腹水水平为(2.21±1.44)ng/L。结核性腹水ET-1水平为(68.24±19.48)ng/L,肿瘤性腹水水平为(42.17±16.40)ng/L,肝硬化腹水水平为(22.46±16.77)ng/L,P-selectin和ET-1水平在结核性腹水中明显高于肿瘤性腹水(P<0.05)和肝硬化性腹水(P<0.01),两者水平在肿瘤性腹水和肝硬化腹水之间的也存在显著性差异(P<0.05)。结论:P-selectin和ET-1的表达与机体炎症反应被激活及肿瘤的侵袭与转移有关,故结核性及肿瘤性腹水中P-selectin和ET-1水平有不同程度的增高,P-selectin及ET-1水平可作为一种筛选手段,以初步鉴别腹水的性质。     

Expression of Angiopoietin-2 Gene and Its Receptor Tie2 in Hepatocellular Carcinoma

The relationship of angiogenesis and solid tumoris one hot spot in tumor researching field.Tumor isconsisted of tumor cells and vessels. Tumor inducesand promotes angiogenesisand vice versa. Angiogen-esis promotes tumor development and provides path-ways for tumor metastasis[1,2 ] .Anti- angiogenesis isconsidered one potent anti- tumor therapy. Hepato-cellular carcinoma( HCC) is characteristic of highblood infusion,high vascular metastasis and recur-rence. Angiogenesis may play an important …     

内皮型一氧化氮合酶基因G894T多态性与血压变化的关系

目的探讨内皮型一氧化氮合酶(eNOS)基因G894T多态性与中国汉族人原发性高血压(以下简称高血压,EH)的相关性。方法采用多聚酶链反应结合限制性内切酶片段长度多态性分析方法,检测310例高血压患者(高血压组)和151例健康人(对照组)的eNOS基因G894T多态性。结果1)高血压组GT+TT基因型和T等位基因频率显著高于对照组(P<0.05);2)高血压组T等位基因携带者的收缩压(20.07±1.81)kPa〔(150.50±13.56)mmHg〕、舒张压(13.33±0.73)kPa〔(100.01±8.46)mmHg〕和平均动脉压(15.58±1.05)kPa〔(116.84±7.84)mmHg)〕均高于GG基因型携带者〔(19.59±1.62)kPa〔(146.96±12.18)mmHg〕、(12.99±1.06)kPa〔(97.44±7.98)mmHg〕、(15.19±1.0)kPa〔(113.95±7.49)mmHg〕〕,2组比较差异有统计学意义(P<0.05)。结论eNOS基因G894T多态性的T等位基因是中国汉族人高血压的重要危险因素之一。     

Effect of Nuclear Factor-κB on Airway Remodeling in Asthmatic Rats

Summary In order to investigate the effect of nuclear factor-κB (NF-κB) on airway remodeling in asthmatic rats. 18 Wistar rats were divided into three groups: asthmatic group: pyrrolidine dithiocarbamate (PDTC) group, in which rats were injected intraperitoneally with NF-κB specific inhibitor PDTC (100 mg/kg) before ovalbumin (OVA) challenge; control group. The NF-κB activity and the expression of inhibitory protein κBα (I-κBα) in airway were detected by electrophoretic mobility shift assay (EMSA). Western blot and immunohistochemistry respectively. The infiltration of inflammatory cells, the number of Goblet cells, the area of collagen and smooth muscle in airway were measured by means of image analysis system. The results showed that with the up-regulation of airway NF-κB activity in asthmatic group, the number of goblet cells (3.08±0.86/100 μm basement membrane (BM)), the area of collagen (24.71±4.24 μm²/μm BM) and smooth muscle (13.81±2.11 μm²/μmBM) in airway were significantly increased (P<0.05) as compared with control group (0.14±0.05/100μmBM. 14.31±3.16 μm²/μm BM and 7.67±2.35 μm²/μm BM respectively) and PDTC group (0.33±0.14/100 μmBM, 18.16±2.85 μm²/μm BM and 8.95±2.16 μm²/μm BM respectively). However, there was no significant difference between PDTC group and control group (P>0.05). It was concluded that the activity of NF-κB is increased in airway of asthmatic rats. Inhibition of NF-κB, activation can attenuate constructional changes in asthma airway, suggesting NF-κB may contribute to asthmatic airway remodeling. XU Shuyun, female, born in 1970, M. D. Ph. D. This project was supported by a grant from Foundation for University Key Teacher by the Ministry of Education (2000 year).     

Experimental Study on the Inhibitory Effects of Verapamil on the Proliferation of Meningiomas Cells

In order to investigate the effects of verapamil on the proliferation of meningiomas cells in vitro and in vivo, the cultured meningiomas cells were cultured with verapamil at different concen-trations for 24 h and the inhibitory effects of verapamil on cell proliferation were observed by MTT method. The meningiomas model was established by implanting the newly removed tumor fragments into the nude mice subcutaneously. The nude mice with tumors were divided into two groups: vera-pamil-treated group and control group. Tumor volumes were measured and after 12 weeks the tumors were taken out and examined histologically. The expression of proliferating cell nuclear antigen (PCNA) in the tumors was detected by using immunohistochemistry. It was found that verapamil could inhibit the growth of cultured meningiomas cells in a concentration-dependant manner. The in-hibitory effect could be observed in the concentration of 1 μmol/L verapamil and the most obvious effects appeared in the concentration of 100 μmol/L. Tumor volume in the verapamiltreated group was obviously smaller than that in the control group (211.40±5.50 vs 163.94±3.62, P<0.01) and the expression of PCNA was also lower (1.52±0.24 vs 2.86±0.53, P<0.05). Tumor inhibition rate was about 22.45%. It was suggested that verapamil could inhibit the proliferation and growth of men-ingiomas cells in vitro and in vivo.     

Placental Isoferritin Action in Pathogenesis of Pre-eclampsia and/or Intrauterine Growth Retardation and Its Earlier Predictive Value

Pre- eclampsia and intrauterine growth retarda-tion(IUGR) are major sources of clinical morbidityand mortality in pregnant women and prenatal in-fants.Their mechanisms are not completely clear.The imbalance of maternal- fetal immune interactionwas demonstrated to play a role in them[1] .Recentlyplacental isoferritin (PLF) was demonstrated to be asignificant immune regular factor in pregnant im-mune inhibition[2 ] ,butitsrole in pathogenesisof pre-eclampsia and/or IUGR is unknown.In this s…     

The Protective Effect of Rosuvastatin on Ischemic-Brain Injury and Its Mechanism

The statins, which lower plasma cholesterol levels, are 3-hydroxy-3-methylglutaryl coenzyme A (HMGCoA) reductase inhibitors. To date, stains have developed to third generation, which include five commonly used stains: lovastatin, pravastatin, simvastatin, fluvastatin and atorvastatin. Recently, a new statin, named rosuvas-tatin, was used in the third stage of clinical trial. Rosu-vastatin, in contrast to most other statins, has the more powerful capability to lower plasma cholesterol levels,…     

The Effects of PDTC on Interleukin-1β-induced Nitric Oxide Production in Chondrocytes

In order to find new drugs to inhibit nitric oxide （NO） production, the effects of pyrrolidine dithiocarbamate （PDTC）, a nuclear factor-kappa B （NF-κB） inhibitor, on recombinant human interleukin-1β （rhIL-1β）-induced NO production in chondrocytes were investigated. Rat chondrocytes were isolated and cultured, divided into control, P0, P1, P2, P3 and P4 groups. The chondrocytes in the P0, P1, P2, P3 and P4 groups were treated with different concentrations of PDTC （0, 3, 10, 30, and 50 p.mol/L respectively） for 1 h and then incubated with 5 U/mL rhIL-1β for 24 h. NO assay kit and RT-PCR were used to detect the NO content and the iNOS mRNA expression in the chondrocytes The expression level of iNOS mRNA in control, P0, P1, P2, P3 and P4 groups was 0.02±0.01, 1.24±0.13, 1.21±0.14, 0.61±0.11, 0.40±0.09, 0.21±0.06, and the relative content of NO was 15.8±2.7, 100±14.8, 92.6±9.3, 68.3±14.2, 27.5±9.8, 19.8±3.6, respectively. In the P0, P1, P2, P3 and P4 groups, the expression of iNOS mRNA and NO production were significantly increased as compared with those in the control group. As compared with the P0 group, the expression of iNOS mRNA and NO content in control group were lower. In the P2, P3 and P4 groups, PDTC could significantly inhibit the expression of iNOS and NO production induced by rhIL-1β in a concentration-dependent manner. It is suggested that PDTC can inhibit NO production and iNOS mRNA expression induced by IL-1β, which may provide an alternative method for the treatment of osteoarthritis.     

Prospective evaluation of postoperative outcome after liver transplantation in hepatopulmonary syndrome

OBJECTIVE: To determine the frequency of hepatopulmonary syndrome in orthotopic liver transplantation (OLT) patients with chronic end-stage-liver-disease, and the short-term and long-term postoperative outcome of HPS patients after OLT. METHODS: This prospective study included 31 HPS patients and 30 case control non-HPS patients. The preoperative condition was similar between the two groups. 26 of 31 HPS patients and all non-HPS patients underwent OLT. Standardized methods such as arterial blood gas at room air and 99m-technetium macroaggregated albumin (99mTcMAA) lung and brain perfusion scanning were performed for the diagonosis of HPS. Patients were followed up after OLT. RESULTS: The incidence of HPS in OLT patients was 9.32% (26/279). Hypoxemia in HPS was obviously improved with normalized shunt of 99mTcMAA in lungs after OLT. The immediate postoperative survival rate (within 28 days after OLT) of HPS was 76.92%(20/26). The one year survival was 61.54% (16/26), and four-year survival was 57.69% (15/36), much higher than those of HPS patients without OLT (0%). But high postoperative morbidity and mortality were observed in HPS patients. CONCLUSION: Liver transplantation was an effective treatment for HPS. But the postoperative mortality rate following OLT in HPS patients was still much higher than that of patients without HPS.     

Expression of Endothelial Nitric Oxide Synthase Traffic Inducer in the Placenta of Pregnancy Induced Hypertension

Endothelial nitric oxide synthase traffic induc-er(NOSTRIN),a58kD(1kD=0.9921ku)pro-tein with complete unknown function that was i-dentified using the yeast two-hybrid system byZi mmermannet al[1],and Zi mmermann demon-strated that NOSTRIN over-expression induced aprofound redistribution of eNOS fromthe plasmamembrane to vesicle-like structures matching theNOSTRIN pattern and at the same ti me led to asignificant inhibition of NO release[1].WhetherNOSTRIN do involve in the mechani…     

Antagonistic effects of trasilast on proliferation and collagen synthesis induced by TGF-\sB<Subscript>2</Subscript> in cultured human trabecular meshwork cellsin cultured human trabecular meshwork cells

Summary Whether tranilast had antagonistic effect on proliferation inhibition and collagen synthesis promotion induced by TGF-\sB₂ in cultured human trabecular meshwork cells was investigated. Suspension of 1×10⁴ cultured human trabecular meshwork cells of 3–5 passage was distributed in each well of a 96-well disk and divided into control group and experimental group. After 24 h, 0 μg/ml (control), 12.5 μg/ml, 25 μg/ml, 50μg/ml tranilast with 3.2 ng/ml TGF-\sB₂ were added into the incubation medium. Another 24 h later, proliferation and collagen synthesis in cultured human trabecular meshwork cells were examined respectively by using tetrazolium-based semiautomated colormetric (MTT) assay and³H-proline incorporation with liquid scintillation technique. The results showed absorbance (A) values of the experimental groups were 0.9036±0.3017, 1.1361±0.1352, 1.2457±0.1524 according to the different concentrations of tranilast, and 0.8956±0.1903 of the control group. In comparison with the control group, 25 μg/ml (q=3.23,P<0.05), 50 μg/ml (q′=4.70,P<0.01) tranilast significantly antagonized the decrease of theA values induced by TGF-\sB₂ in the cultured human trabecular meshowrk cells. In comparison with the control group [817.37±124.21 cpm/10⁴ cells], 12.5 μg/ml (620.33±80.46 cpm/10⁴ cells,q′=4.26,P<0.05), 25 μg/ml (59.4.58±88.13 cpm/10⁴ cells,q′=4.81,P<0.01), 50 μg/ml (418.64±67.90 cpm/10⁴ cells,q′=8.62,P<0.01) tranilast significantly inhibited the incorporation of³H-proline into the cultured human trabecular meshwork cells promoted by TGF-\sB₂ in a dose-dependent manner. It was concluded that tranilast had the antagonistic effect on the proliferation inhibition and collagen synthesis promotion induced by TGF-\sB₂ in the cultured human trabecular meshwork cells. Da Banghong, female, born in 1973, Resident. This project was supported by a grant from the National Natural Sciences Foundation of China (No. 38970758).     

Reversal of multi-drug resistance by vector-based-ShRNA-Mdr1 <Emphasis Type="Italic">In Vitro</Emphasis> and <Emphasis Type="Italic">In Vivo</Emphasis>

In order to investigate the effects of vector-based hairpin small interference RNA （shRNA） on the reversal of multi-drug resistance （mdr） of A2780/Taxol cells, a novel vector pEGFP-HI/mdrl containing mdrl-shRNA targeting at position 2943-2963 of mdrl was designed and synthesized. Subsequently, A2780/Taxol cells were transfected with pEGFP-H1/rndrl, and the expression ofmdrl mRNA and P-gp was detected by using RT-PCR and Western blot respectively. MTT was used to measure the 50% inhibition concentration （IC50） of Taxol to A2780/Taxol cells. The results showed that at the 24th and 48th h after transfection, the expression of mdrl mRNA was decreased to （52.1±1.0）% and （0.01±1.7）%, and that of P-gp decreased to （88.3±2.1）% and 0%, respectively. At the 48th h after transfection, the relative reversal rate of A2780/Taxol cells to Taxol was 69.54%. In vivo, the nude mice xenografts were injected with pEGFP-H1/mdrl, and then administrated Taxol. The tumor volume in pEGFP-H1/mdrl-transfected group was significantly reduced as compared with that in blank control group or pEGFP-Hl-transfected group （807.20±103.16 vs 1563.78±210.54 or 1480.78±241.24 mm^3, both P〈0.01）. These results suggested that transfection of pEGFP-HI/mdrl could efficiently down-regulate the expression of mdrl mRNA and P-gp in A2780/Taxol cells, and effectively restore the sensitivity of A2780/Taxol ceils to Taxol both in vitro and in vivo.     

Endothelial nitric oxide synthase traffic inducer in the umbilical vessels of the patients with pre-eclampsia

The expression of endothelial nitric oxide synthase traffic inducer （NOSTRIN） was examined in the umbilical vessels of the patients with pre-eclampsia （PE） to explore its possible role in the pathogenesis of PE. The NOSTR1N rnRNA in umbilical tissues was determined by RT-PCR. The eNOS activity in umbilical vessels was spectrophotometrically detected. NO2 /NO3, the stable metabolic end products of NO, was measured by using nitrate reductase. RT-PCR showed that the expression level of NOSTRIN was significantly higher in women with PE than in the normal group （P〈0.01）. The activity of eNOS was significantly decreased in PE group [（12.83±3.61） U/mg] than in normal group [（21.72±3.83） U/mg] （P〈0.01）. The level of NO2-/NO3- in PE patients （27.53±7.48） pmol/mg was significantly lower than that of normal group （54.27±9.53） μmol/mg （P〈0.01）. The significant negative correlation existed between the expression of NOSTRIN and the activity of eNOS in umbilical vessels of women with PE （r=-0.58, P〈0.01）. It was concluded that the level of NOSTR1N expression was increased in umbilical vessel of women with PE, indicating that it may be involved in the pathogenesis of PE.     

成人HPS临床特征及多种细胞因子水平与预后的相关性

  目的  分析成人噬血细胞综合征（hemophagocytic syndrome，HPS）患者临床特征及多种细胞因子水平与预后相关性。  方法  收集19例成人噬血细胞综合征患者资料，分析其临床特征、实验室检查，并收集其血液样本进行12项细胞因子水平检测，分析其与预后的相关性。  结果  HPS患者细胞因子IL-1β、IL-2、IL-4、IL-8、IL-10、IL-6、IFN-γ、TNF-α的水平高于非HPS非感染患者组（P < 0.05）；HPS患者细胞因子IL-4、IL-5、IL-10、IFN-γ、TNF-α的水平高于非HPS感染患者组（P < 0.05），IL-10、IFN-γ、TNF-α3种细胞因子ROC曲线示其AUC在0.7～0.9之间，用于诊断HPS具有一定的准确性。HPS死亡组患者发病时Fib明显低于存活组（P < 0.05），而HPS死亡组患者发病时年龄、性别、临床特征（发热、肝脾、淋巴结肿大）及实验室检查（ALT、AST、TBIL、ALB、Fer、TG、ACN、HGB、PLT）与存活组，差异无统计学意义（P > 0.05），而HPS死亡组患者发病时，IL-1β、IL-8、TNF-α明显高于存活组（Ｐ < 0.05）。  结论  HPS可出现多种细胞因子水平升高，其中IL-10、IFN-γ、TNF-α明显升高可能对其诊断具有一定意义，Fib明显下降及IL-1β、IL-8、TNF-α明显升高可能提示预后不良。     

Trichostatin A Regulates hGCN5 Expression and Cell Cycle on Daudi Cells in vitr

Summary The expression of human general control of amino acid synthesis protein 5 (hGCN5) in human Burkitt’s lymphoma Daudi cells in vitro, effects of Trichostatin A (TSA) on cell proliferation and apoptosis and the molecular mechanism of TSA inhibiting proliferation of Daudi cells were investigated. The effects of TSA on the growth of Daudi cells were studied by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium (MTT) assay. The effect of TSA on the cell cycle of Daudi cells was assayed by a propidium iodide method. Immunochemistry and Western blot were used to detect the expression of hGCN5. The proliferation of Daudi cells was decreased in TSA-treated group with a 24 h IC₅₀ value of 415.3979 μg/L. TSA induced apoptosis of Daudi cells in a time-and dose-dependent manner. Treatment with TSA (200 and 400 μg/L) for 24 h, the apoptosis rates of Daudi cells were (14.74±2.04) % and (17.63±1.25) %, respectively. The cell cycle was arrested in G₀/G₁ phase (50, 100 μg/L) and in G₂/M phase (200 μg/L) by treatment with TSA for 24 h. The expression of hGCN5 protein in Daudi cells was increased in 24 h TSA-treated group by immunochemistry and Westem blot (P<0.05). It was suggested that TSA as HDACIs could increase the expression of hGCN5 in Daudi cells, and might play an important role in regulating the proliferation and apoptosis of B-NHL cell line Daudi cells. This project was supported by grant from the National Natural Sciences Foundation of China (No. 30271672).