miR-24-3p在涎腺腺样囊性癌组织中的表达及其对ACC-M细胞增殖、侵袭的影响

目的探讨miR-24-3p在涎腺腺样囊性癌组织中的表达及其对腺样囊性癌细胞系ACC-M增殖以及侵袭能力的影响。方法通过实时PCR检测5例涎腺腺样囊性涎组织及癌旁正常组织miR-24-3p的表达水平;将miR-24-3p模拟物瞬时转入高转移腺样囊性癌细胞系(ACC-M)使miR-24-3p过表达,并通过实时PCR方法验证;流式细胞仪分析转染后ACC-M细胞周期的改变,甲基噻唑基四唑比色法检测转染后ACC-M细胞的增殖,Transwell实验检测转染后ACC-M细胞的侵袭能力,蛋白质免疫印迹法检测转染后ACC-M细胞血小板源性生长因子受体B(PDGFRB)的表达变化。结果 miR-24-3p在涎腺腺样囊性癌组织中的表达水平显著低于癌旁正常组织。转染miR-24-3p mimics能够显著上调ACC-M细胞miR-24-3p的表达水平,ACC-M细胞的S期比例明显下降,而G_0/G_1期的细胞明显增多,增殖受到明显抑制,侵袭能力下降,显著降低ACC-M细胞PDGFRB的蛋白表达。结论 miR-24-3p在涎腺腺样囊性癌中低表达,过表达miR-24-3p能够抑制涎腺腺样囊性癌细胞的增殖与侵袭能力。     

趋化因子SDF-1α及其受体介导涎腺腺样囊性癌细胞的趋化与侵袭

探讨趋化因子SDF-1α及其受体CXCR4对涎腺腺样囊性癌细胞趋化与侵袭活性的促进作用。采用RT-PCR法检测涎腺腺样囊性癌肺高、低转移细胞株ACC-M和ACC-2中CXCR4 mRNA的表达;Boyden趋化小室法检测在SDF-1α作用下ACC-M细胞和ACC-2细胞的趋化与侵袭活性;检测CXCR4 mAb对ACC-M细胞和ACC-2细胞趋化活性和侵袭活性的抑制作用。结果显示:2株涎腺腺样囊性癌细胞中均存在不同程度CXCR4 mRNA的表达,其在肺高转移细胞株ACC-M中的表达显著高于肺低转移细胞株ACC-2;SDF-1α对2种细胞均具有趋化活性和侵袭活性,且对ACC-M细胞的趋化活性和侵袭活性显著强于ACC-2细胞;CXCR4 mAb能够抑制涎腺腺样囊性癌细胞的这种趋化活性和侵袭活性。趋化因子SDF-1α及其受体CXCR4能够介导涎腺腺样囊性癌细胞的趋化与侵袭。     

Mi R-31在胃癌组织中低表达并抑制HGC-27细胞增殖、迁移与侵袭

目的研究miR-31在胃癌患者中的表达,探讨miR-31对胃癌HGC-27细胞增殖、侵袭和转移的影响。方法收集胃癌患者标本39例,同时收取相应的癌旁组织20例。通过荧光定量PCR方法检测各组织中miR-31的表达水平。以脂质体为载体将miR-31模拟物转染至HGC-27细胞,CCK-8方法检测细胞增殖能力变化,Transwell实验检测HGC-27细胞侵袭和迁移能力变化。结果 miR-31在胃癌组织中的表达水平明显低于癌旁组织,P0.01。过表达miR-31能够显著抑制HGC-27细胞的增殖,显著抑制HGC-27细胞的侵袭和迁移能力(P0.01)。结论 MiR-31在胃癌中低表达,并抑制胃癌细胞系HGC-27的增殖、迁移和侵袭。     

miR-141的过表达抑制MHCC-97H肝癌细胞的增殖和侵袭迁移

目的观察肝细胞癌组织中miR-141的表达水平,通过上调MHCC-97H肝癌细胞中miR-141的水平观察对MHCC-97H细胞增殖、侵袭及迁移的影响。方法实时定量PCR检测miR-141在肝癌及癌旁组织中的表达水平,并分析miR-141表达水平与临床病理指标的关系及生存率。利用人工合成的miR-141模拟物,瞬时转染MHCC-97H细胞。MTT法检测MHCC-97H细胞的增殖,TranswellTM实验检测MHCC-97H细胞的侵袭及迁移,Westernblot法及免疫组织化学检测miR-141下游潜在靶点肝细胞产生的促红素受体A2(EphA2)的表达。结果miR-141在肝癌组织中表达水平显著低于相应癌旁组织;肝癌组织中miR-141低表达与TNM分期、门静脉侵犯及Edmondson分级显著相关;低表达miR-141患者3年生存率明显低于高表达组;miR-141模拟物转染可上调MHCC-97H细胞miR-141水平,上调miR-141可显著抑制MHCC-97H细胞的增殖、侵袭及迁移,并下调EphA2的蛋白水平;miR-141低表达组EphA2蛋白水平明显高于miR-141高表达组,相关性分析显示肝癌组织中miR-141与EphA2蛋白表达呈显著负相关。结论miR-141在肝癌组织中表达下调且与EphA2表达呈显著负相关,其低表达与肝癌恶性临床病理特征有关,上调miR-141表达可抑制EphA2的表达抑制肝癌细胞增殖、侵袭及迁移能力。     

miR-21在胶质瘤中的表达及其对胶质瘤增殖及迁移的影响

目的探讨miR-21在胶质瘤中的表达及其对胶质瘤增殖迁移的影响。方法用实时荧光定量PCR方法检测39例胶质瘤组织及其对应癌旁组织miR-21的表达;利用Lipofectamine~(TM)2000将miR-21模拟物或抑制剂及其阴性对照转染至人U87胶质瘤细胞,分别应用CCK-8法和Transwell小室法检测人胶质瘤U87细胞的增殖及迁移能力。结果胶质瘤组织中miR-21的相对表达量为4.58±1.55,癌旁组织的miR-21相对表达量为1.87±0.59,胶质瘤组织中miR-21的表达显著高于癌旁组织(P0.01)。与对照组相比,miR-21模拟物能够显著上调胶质瘤U87细胞系的增殖以及迁移能力(P0.01);miR-21抑制剂则能够显著降低胶质瘤U87细胞系的增殖以及迁移能力(P0.01)。结论 miR-21可能是治疗胶质瘤的潜在靶点。     

miR-4746促进PRKACB表达上调并促进食管鳞癌细胞增殖

目的研究miR-4746在食管鳞癌中的表达及其对食管鳞癌细胞的增殖的影响。方法收集食管鳞癌患者的癌组织和癌旁组织标本,RT-PCR和Western blot检测miR-4746和PRKACB的表达,并分析二者mRNA水平的相关性。培养EC9706、HET-1A、TE-1细胞,并转染miR-control、miR-4746 mimic或inhibitor,RT-PCR检测PRKACB的表达水平,MTT法检测细胞的增殖水平。结果在食管鳞癌患者的标本中,癌组织中miR-4746和PRKACB的表达显著低于癌旁组织,miR-4746和PRKACB的表达水平呈正相关。在转染miR-4746 mimic后,PRKACB的表达上调,EC9706、HET-1A、TE-1细胞的增殖受到促进;在转染miR-4746 inhibitor后,PRKACB的表达下调,EC9706、HET-1A、TE-1细胞的增殖受到抑制。结论miR-4746促进PRKACB表达上调,并促进食管鳞癌细胞的增殖。     

涎腺腺样囊性癌中Cyclin D1、MMP-7和PRB2/p130表达及意义

目的探讨Cyclin D1、MMP-7和PRB2/p130蛋白在涎腺腺样囊性癌组织中的表达及与涎腺腺样囊性癌生物学行为的关系。方法应用免疫组化SP法检测46例涎腺腺样囊性癌和30例正常涎腺组织中Cyclin D1、MMP-7和PRB2/p130蛋白的表达。结果 Cyclin D1、MMP-7和PRB2/p130在涎腺腺样囊性癌中的阳性率分别为71.74%、67.39%、63.04%;Cyclin D1和PRB2/p130蛋白在涎腺腺样囊性癌中的表达与病理类型有关(P<0.05),MMP-7在涎腺腺样囊性癌中的表达与病理类型无关(P>0.05);Cyclin D1、MMP-7和PRB2/p130蛋白在涎腺腺样囊性癌复发组中的阳性率与无复发组相比,差异有显著性(P<0.05);Cyclin D1与PRB2/p130在涎腺腺样囊性癌中的表达呈负相关,与MMP-7表达呈正相关。结论 Cyclin D1、MMP-7和PRB2/p130蛋白的异常表达在涎腺腺样囊性癌发生、发展和复发中起重要作用,联合检测多个指标可能对患者预后的判断有指导意义。     

miR-551b-3p在胃癌组织中低表达并抑制胃癌细胞系HGC-27的增殖、迁移和侵袭

目的探讨miR-551b-3p在胃癌中的表达变化情况,及其对胃癌细胞功能的影响。方法用real-time PCR的方法检测60例胃癌组织及其对应的癌旁组织中miR-551b-3p的表达量,使用miR-551b-3p模拟物(miR-551b-3p mimic)转染胃癌细胞系HGC-27,CCK-8法检测细胞增殖;划痕愈合实验检测细胞迁移;Transwell法检测细胞侵袭。结果 1)miR-551b-3p在胃癌癌症组织中的表达明显低于癌旁组织(P0.05)。2)过表达miR-551b-3p mimic可以明显减弱胃癌细胞系HGC-27的增殖、迁移和侵袭能力。结论 miR-551b-3p在胃癌组织中低表达,并且抑制胃癌细胞系HGC-27的增殖、迁移和侵袭,可能与胃癌发生发展密切相关。     

过表达miR-101对卵巢癌SKOV3细胞增殖和迁移的影响及可能机制

目的探讨miR-101对卵巢癌SKOV3细胞增殖、迁移的影响及可能机制。方法将卵巢癌SKOV3细胞分为miR-101模拟物组、miR-101阴性对照组及空白对照组,将miR-101模拟物转染至miR-101模拟物组细胞,阴性对照组细胞转染无关序列,空白对照组细胞不作任何处理,采用Real time PCR方法验证其转染效率,分别用MTT方法与Transwell实验检测转染后各组SKOV3细胞的增殖与迁移能力变化。采用双荧光素酶报告基因验证Girdin是否为miR-101的靶基因,Real-time PCR与Western blot实验分别检测各组细胞Girdin mRNA和蛋白表达水平。结果与对照组相比,miR-101模拟物组SKOV3细胞miR-101表达水平显著升高(P0.01)。与对照组相比,miR-101模拟物组SKOV3细胞增殖、迁移能力显著降低(P0.01)。双荧光素酶报告基因分析结果显示,Girdin为miR-101的靶基因;过表达miR-101后,Girdin mRNA及蛋白表达水平显著降低(P0.01)。结论 miR-101可能通过下调Girdin的表达抑制卵巢癌SKOV3细胞的增殖、迁移。     

MiR-33a在胃癌组织中低表达并抑制HGC-27细胞增殖、迁移与侵袭

目的探讨miR-33a在胃癌患者中的表达,探讨miR-33a对胃癌HGC-27细胞增殖、侵袭和转移的影响。方法收集胃癌患者标本39例,同时收取相应的癌旁组织20例。通过荧光定量PCR方法检测各组织中miR-33a的表达水平。以脂质体为载体将miR-33a模拟物转染至HGC-27细胞,CCK-8方法检测细胞增殖能力变化,Transwell实验检测HGC-27细胞侵袭和迁移能力变化。结果 miR-33a在胃癌组织中的表达水平明显低于癌旁组织,过表达miR-33a能够显著抑制HGC-27细胞的增殖,显著抑制HGC-27细胞的侵袭和迁移能力。结论 miR-33a可能对胃癌有治疗作用。     

Modes of reinforcement and gender and culture of experimenter and subject: effects of "alien" and external reinforcement for Japanese and American men and women

In this study, we examined external and "alien" reinforcement (ER and AR. respectively) as a factor in social learning, and studied the combined effects of culture and reinforcement mode. A female (Experiment 1) and a male (Experiment 2) experimenters conducted experimental sessions. Both men and women, who grew up in the same culture as the experimenter, participated and performed the experimental task. A three-way interaction effect of experimenter gender, culture, and reinforcement mode was found on task performance. And the effect was more pronounced for a Japanese experimenter. A female and a male experimenters conducted Experiments 3 and 4, respectively; however participants this time were men and women who grew up in different cultures than the experimenter. Results indicated that the pattern of the subject gender and reinforcement mode interaction effect, when the experimenter was Japanese with American subjects, was exactly opposite to that when the experimenter was American. These experiments showed that AR was as effective for social learning as ER, and that the cultural backgrounds of experimenter and subject influenced AR and ER effectiveness.     

Timing and intensity of early fevers and the development of allergies and asthma

BACKGROUND: Early childhood fevers appear to protect against later allergies and asthma. What is not known is the time in which fevers exert this effect and whether the degree of temperature increase is important. OBJECTIVE: We sought to examine the relationship between the time and degree of early fevers and later allergies and asthma. METHODS: Eight hundred thirty-five children from southeast Michigan were enrolled at birth. Clinic records from their first 2 years were abstracted for episodes of fever. At age 6 to 7 years, children underwent allergy testing. We examined fevers occurring within 6-month intervals in the first 2 years of life and outcomes at age 6 to 7 years. The primary outcome measures were allergic sensitization, asthma, asthma with allergic sensitization, and asthma without allergic sensitization. RESULTS: In the unadjusted analysis each episode of fever between 7 and 12 months of age was associated with a lower odds of allergic sensitization (odds ratio [OR], 0.71; 95% CI, 0.54-0.93) and asthma with allergic sensitization (OR, 0.43; 95% CI, 0.21-0.90) at age 6 to 7 years. Likewise, every 1 degrees C increase in the maximum temperature between 7 and 12 months was associated with a lower odds of allergic sensitization (OR, 0.77; 95% CI, 0.61-0.96) and asthma with allergic sensitization (OR, 0.62; 95% CI, 0.40-0.94). After adjusting for potential confounders, each episode of fever between 7 and 12 months was associated with a lower likelihood of asthma with allergic sensitization (adjusted OR, 0.33; 95% CI, 0.11-0.94) at age 6 to 7 years. CONCLUSIONS: Both the timing and intensity of childhood fevers appear to be important factors in the development of allergies and asthma.     

Rates of oxygen consumption and of anaerobic glycolysis in renal cortex and medulla of adult and new-born rats and guinea-pigs

1. Rates of oxygen uptake and of anaerobic glycolysis were estimated in slices from the renal cortex and medulla (a) of adult rats and guinea-pigs, (b) of new-born (1-, 5- and 21-day-old) rats and of guinea-pigs of 1, 12, 21, 24 and 120 hr age.2. In the adult rat, Q(O2) values for the cortex were 12.55 +/- 0.20 (22) and for the medulla: 8.56 +/- 0.17 (22) mul./hr.mg dry weight, while in the new-born rat (24 hr old) they were 10.99 +/- 0.46 (12) and 9.33 +/- 0.18 (9) mul./hr.mg dry weight respectively.3. Values for Q(CO2) (N2) (anaerobic glycolysis) in the 14 hr old new-born rat were in the renal cortex 9.65 +/- 0.35 (5) and in the medulla 7.39 +/- 0.43 (5) mul./hr.mg dry weight; while in the adult they were 2.25 +/- 0.08 (16) and 5.76 +/- 0.14 (16) mul./hr.mg dry weight, respectively.4. In the adult guinea-pig values for Q(CO2) (N2) were of the same order as in the adult rat, though the rate of O(2) uptake was for the cortex 8.12 +/- 0.22 (12) and for the medulla 5.02 +/- 0.23 (11) mul./hr.mg dry weight.5. Though the Q(O2) values in the renal cortex and medulla were smaller in the 1 hr old new-born guinea-pig, they were already increasing in the 12 hr old neonate.6. The results are discussed in the light of enzyme changes occurring during the process of maturation of the nephron as indicated by histochemical observations.     

男性乳腺发育症临床病理分析及雌,孕激素受体检测

对１１３例男性乳腺发育症进行临床病理分析。同时检测其中３０例乳腺组织中雌激素受体和孕激素受体分布情况，结果发现两者阳性率分别为８０．０％和８３．３３％。结合文献讨论了男性乳腺发育症的发生与高血清激素浓度及乳腺组织高受体水平的关系。     

Association between functional alterations of senescence and senility and disorders of gait and balance

OBJECTIVES:

Declines in cognition and mobility are frequently observed in the elderly, and it has been suggested that the appearance of gait disorders in older individuals may constitute a marker of cognitive decline that precedes significant findings in functional performance screening tests. This study sought to evaluate the relationship between functional capacities and gait and balance in an elderly community monitored by the Preventive and Integrated Care Unit of the Hospital Adventista Silvestre in Rio de Janeiro, RJ, Brazil.

METHODS:

Elderly individuals (193 females and 90 males) were submitted to a broad geriatric evaluation, which included the following tests: 1) a performance-oriented mobility assessment (POMA) to evaluate gait; 2) a mini-mental state examination (MMSE); 3) the use of Katz and Lawton scales to assess functional capacity; 4) the application of the geriatric depression scale (GDS); and 5) a mini-nutritional assessment (MNA) scale.

RESULTS:

Reductions in MMSE, Katz and Lawton scores were associated with reductions in POMA scores, and we also observed that significant reductions in POMA scores were present in persons for whom the MMSE and Katz scores did not clearly indicate cognitive dysfunction. We also demonstrated that a decline in the scores obtained with the GDS and MNA scales was associated with a decline in the POMA scores.

CONCLUSIONS:

Considering that significant alterations in the POMA scores were observed prior to the identification of significant alterations in cognitive capacity using either the MMSE or the Katz systems, a prospective study seems warranted to assess the predictive capacity of POMA scores regarding the associated decline in functional capacity.