Arsenic trioxide (As2O3) reduces the invasive and metastatic properties of cervical cancer cells in vitro and in vivo

OBJECTIVES: Arsenic trioxide (As(2)O(3)) was found to induce apoptosis in certain types of cancer cells including acute promyelocytic leukemia, and recently in solid tumors. We have previously demonstrated that As(2)O(3) has a therapeutic effect on cervical cancer by apoptosis promotion in vitro and in vivo. Here we further our study on the role of arsenic trioxide in regulating invasive activity of cervical cancer cells in vitro and in vivo. METHODS: The effects of As(2)O(3) on human cervical cancer cell lines (HeLa, SiHa, Caski) adhesion, migration and invasion were observed by means of cell adhesion test, cell migration test and cell invasion test. The effects of As(2)O(3) on p-IkappaB, MMP-2, E-cadherin, caveolin-1 and beta-catenin protein expressions of tumor cells were determined by Western blot. In addition, the effects of As(2)O(3) on NF-kappaB activity of tumor cells were analyzed by immunoblot in whole lysates, cytosol and nucleus, respectively. In animal experiments, cervical cancer cells TC-1 were injected into tail veins of C57BL/6 mice and then the mice were treated by intraperitoneal injection of different doses As(2)O(3). Lung weights and the foci on the surface of lungs were measured. RESULTS: As(2)O(3) inhibited attachment of tumor cells to Fibronectin and Matrigel, reduced cell motility and inhibited tumor invasion potential. As(2)O(3) treatment also resulted in a positive regulation of caveolin-1, upregulation of E-cadherin and decreased activity of beta-catenin, NF-kappaB and NF-kappaB-regulated gene MMP-2. In animal experiments, lung weights in PBS group (0.31+/-0.07 g) were significantly elevated compared with those in As(2)O(3)-treated groups (0.21+/-0.03 g and 0.17+/-0.03 g) also As(2)O(3) reduced number of metastatic lesions of lungs (15.4+/-3.5 vs. 8.3+/-2.0 and 6.3+/-2.3) in a dose-dependent manner. CONCLUSIONS: This study is the first to report the effectiveness of As(2)O(3) as an inhibitor of cervical cancer invasion both in vitro and in vivo, suggesting a potential clinical application of As(2)O(3) in cervical cancer therapies combining apoptosis induction and metastasis inhibition.     

Rupture of ectopic pregnancy with minimally detectable beta-human chorionic gonadotropin levels: a report of 2 cases

BACKGROUND: Several studies have demonstrated that 25-77% of ectopic pregnancies spontaneously resolve with expectant management. However, expectant management is controversial and should be considered only for patients with small, unruptured gestational sacs, low beta-human chorionic gonadotropin (beta-hCG) levels and absence of symptoms. There is no consensus on how long to follow such patients. CASES: Two patients with beta-hCG levels < 10 mIU/mL presented with ruptured ectopic pregnancy and hemoperitoneum. CONCLUSION: While expectant management of a suspected ectopic pregnancy may allow spontaneous resolution of such an ectopic pregnancy, rupture may occur at any time and even with extremely low beta-hCG levels. Patients need to be counseled about the risks of rupture and symptoms, immediate action should be taken if symptoms develop, and serum beta-hCG levels should be followed to zero.     

ZP3 peptides administered orally suppress murine experimental autoimmune ovarian disease

Experimental autoimmune ovarian disease (AOD) is a T cell-mediated chronic inflammatory disease that may lead to premature ovarian failure. Autoimmune disease can be suppressed by oral administration of autoantigens leading to tolerance. One of the major mechanisms of oral tolerance is induction of regulatory CD4+ T cells that can mediate active suppression by producing immunomodulatory cytokines. However, the role of oral tolerance as a treatment for experimental AOD has received little attention. Therefore, the purpose of this study was to examine the conditions necessary to produce oral tolerance in experimental AOD in B6AF1 female mice. In this study, mice received different doses of peptides of the mouse zona pellucida 3 (pZP3) via gastric intubation for 7 times. After 4 times of oral administration, AOD was induced by immunization with pZP3. The optimal tolerating regimen for oral administration of pZP3 in mice was 10 microg, which decreased morbidity of oophoritis compared to the control group. In this moderate-dose therapeutic group (MD), alterations in the estrous cycle were normalized and CD4+ T cells that were CD25+ increased while those that were CD25- decreased. The severity of autoimmune oophoritis and the titer of ZP autoantibodies were also significantly reduced. These findings suggest that oral administration of pZP3 may be successfully used as an oral tolerance strategy for suppression of AOD.     

DIFFEKENTIAL CALCIUM－BINDING ABILITY OF FREE AND BOUND PROTEINS－SUGGESTIONOFAN0VELPROTEINS／C4B－BINDINGPKOTE

ＤＩＦＦＥＫＥＮＴＩＡＬＣＡＬＣＩＵＭ－ＢＩＮＤＩＮＧＡＢＩＬＩＴＹＯＦＦＲＥＥＡＮＤＢＯＵＮＤＰＲＯＴＥＩＮＳ－ＳＵＧＧＥＳＴＩＯＮＯＦＡＮ０ＶＥＬＰＲＯＴＥＩＮＳ／Ｃ４Ｂ－ＢＩＮＤＩＮＧＰＫＯＴＥＩＮ－ＢＩＮＤ－ＩＮＧＦＡＣＴＯＲＩＮＨＵＭＡＮＰ...     

Correlation of cell proliferation inhibition and apoptosis induction with expression of human beta 5 integrin on hematopoietic cells

OBJECTIVE To investigate the function of the alpha v beta 5 integrin in hematopoietic cells.

METHODS Tissue culture, integrin expression vectors, gene transfer, polymerase chain reaction (PCR), apoptosis analyses and cytometic analysis were made on hematopoietic cells.

RESULTS The beta 5 integrin cDNA was not expressed in hematopoietic cells following exposure to the beta 5 integrin retrovirus vector pG beta 5CHT. Unbalanced expression of the alpha v beta 3 and alpha v beta 5 integrins occurred during apoptosis induced by serum depletion and upon differentiation. The treatment of hematopoietic cells with anti-alpha v beta 5 monoclonal antibody inhibited apoptosis induced by serum depletion. Inducible expression of the beta 5 integrin cDNA in the hematopoietic cell line K562 caused cellular proliferation inhibition.

CONCLUSIONS The alpha v beta 5 integrin cDNA in hematopoietic cells can inhibit the proliferation of the hematopoietic cell, cause the differentiation of the hematopoietic cells and induce the apoptosis of the hematopoietic cells.

     

LONG-TERM RESULTS IN SURGICAL TREATMENT OF CROHN''S DISEASE

55 patients (24 were male and 31 female; age range 12-'75 years) with Crohn's disease were treated surgically. The lesions were single in 32 (58.2%) and multiple in 23 (41.8To). The distribu- tion was: the small intestine, 26 patients (48.2'70); the colon 20 (35.7%); and both 9 (16.170). Most patients were opera.te{l upon fo;r a.cute abdo- minal pain, intestinal obstruction, abdominal mass and intestinal bleeding. Five patients (9.1%) died during ho.spitalizatioin, 49 were followed up for 0.5 t0 32 years;. Clinical cure was obtained in 22 (54.6To) of the resection group and in 4 (30.7%) of the nonresection group. Indications for surgical treatment are described and com- plications discussed.     

超声体表定位用于颈内静脉中路穿刺置管的实用性观察

目的 通过比较超声定位、引导和解剖标志定位右颈内静脉穿刺置管的成功率和并发症,阐述超声体表定位应用于颈内静脉穿刺置管的临床意义.方法 择期手术患者150例,美国麻醉师协会分级Ⅰ～Ⅲ级,计算机随机号码表随机化分为解剖标志组、超声体表定位组和超声引导组,每组50例.全麻气管内插管后行右侧颈内静脉穿刺置管,解剖标志组采用体表解剖标志定位中路法穿刺,超声体表定位组和超声引导组分别在B超体表定位和引导下行颈内静脉中路穿刺.记录颈内静脉与颈总动脉的关系、穿刺针入静脉位置、穿刺成功率、穿刺点更换次数及并发症.结果 超声扫查显示右侧颈内静脉与颈总动脉的关系可分为:并行、部分重叠、完全重叠3种,其中并行关系占12.7％、部分重叠占69.3％、完全重叠占18.0％;颈内静脉“安全穿刺范围”平均为(1.15±0.47)cm;超声体表定位组和超声引导组一针穿刺成功率分别为78.0％和82.0％,明显大于解剖标志组的22.0％ (P ＜0.05);而并发症解剖标志组(12.0％)明显高于超声体表定位组(0)和超声引导组(0)(P＜0.05).结论 超声体表定位可通过声像图了解穿刺横截面内动、静脉的内径、关系及走向,及早发现变异,避免穿刺的盲目性,是一种必要、可行的颈内静脉穿刺置管的辅助手段,因其操作简便、无需他人配合,更适合应用于临床工作.     

METASTATIC NEOPLASMS OF BONE MARROW CLINICAL AND MORPHOLOGICAL ANALYSIS OF 71 CASES

This paper deals with clinical manifestations and hematological findings in 71 cases of bone marrow metastatic cancer. In all patients, the diagnosis of malignant diseases was not made until bone marrow aspiration was examined. In contrary to what was reported in the literature, in our cases metastatic cancer cells were not found more easily in bone mar row biopsy than in aspirates. We consider combina tion of biopsy with aspirates at multiple sites a better way for obtaining positive findings. The morpho- logical characteristics of metastatic cancer cells and nonspecific myeloproliferative reaction to metastasis are described, and differential diagnosis between cancer cells and atypical marrow cells discussed.     

白桦脂酸改善氧化应激损伤大鼠血管的内皮依赖性舒张功能

目的:研究白桦脂酸(betulinic acid,BA)舒张血管效应及抗血管氧化应激损伤的血管保护作用,并探讨其内在机制.方法:取胸主动脉进行离体灌流,用累积加药法观察BA对苯肾上腺素(phenylephrine,PE)预收缩的内皮完整血管环和去内皮血管环的舒张作用,并将血管随机分为正常对照组、BA对照组、H2O2组和BA+H2O2组,并在用PE预收缩后,检测血管环对乙酰胆碱(acetylcholine,ACh)诱导的内皮依赖性舒张反应,血管环张力变化均通过PowerLab生物信号采集系统记录.结果:BA浓度依赖性(10-7 mol/L～10-4 mol/L)舒张PE(10-6 mol/L)预收缩的内皮完整胸主动脉环,pD2值为5.61±0.18,半数有效浓度(EC50)为(2.45×10-6 )mol/L;一氧化氮合酶抑制剂左旋硝基精氨酸甲酯(L-NAME,10-4 mol/L)预处理抑制了该作用,而用吲哚美辛(10-5 mol/L)预处理则无抑制作用.但对PE预收缩的去内皮血管BA无明显舒张作用.H2O2(5×10-4 mol/L)孵育15 min,能降低ACh(10-9 mol/L～10-5 mol/L)诱导的血管舒张作用;EC50的BA孵育30 min,能抑制H2O2氧化应激损伤所致的血管内皮依赖性舒张功能下降.结论:BA具有内皮依赖性舒张血管作用,BA可以减轻H2O2诱导的大鼠胸主动脉内皮依赖性舒张功能降低,这可能与其降低血管内皮氧化应激,维持血管内皮一氧化氮活性有关.     

女性膀胱颈硬化症手术前后尿动力学对照观察

目的 通过对女性膀胱颈硬化症患者手术前后尿动力学观察,期望发现影响手术疗效的原因.方法 30例女性膀胱颈硬化症患者接受经尿道膀胱颈切开术治疗,每例患者均进行6次尿动力学检查,即术前、术后l、2、3、6个月、1年.结果 手术治疗有效27例,无效3例.治疗有效患者的尿动力学参数最大尿流率增大、平均尿流率增大、残余尿量减少、最大逼尿肌压降低(P＜0.05).无效患者的尿动力学参数最大尿流率、平均尿流率、残余尿量、最大逼尿肌收缩压与术前差异无统计学意义(P＞0.05).结论 经尿道膀胱颈切开术是治疗女性膀胱颈硬化症的有效方法,术后仍有排尿梗阻症状患者,虽然手术解决了解剖性梗阻,但此类患者可能合并有功能性梗阻,需进一步行影像尿动力学检查证实.