miR-137通过TWIST1调控乳腺癌MDA-MB-231细胞侵袭、迁移及凋亡

目的:探讨微小RNA-137(miR-137)对乳腺癌细胞侵袭、迁移及凋亡的影响和分子机制。方法:在乳腺癌MDA-MB-231细胞中转染miR-137模拟物(miR-137 mimics),RT-qPCR检测miR-137表达量,流式细胞术检测细胞凋亡,Transwell小室检测侵袭和迁移,Western blot检测基质金属蛋白酶9(MMP-9)、cleaved caspase-3(C-caspase-3)和Bax的蛋白水平。生物信息学软件预测TWIST1可能是miR-137的靶基因后用萤光素酶报告基因鉴定。Western blot检测miR-137 mimics对TWIST1蛋白表达影响。在乳腺癌细胞中共转染TWIST1过表达载体和miR-137 mimics,测定细胞凋亡、侵袭、迁移及MMP-9、C-caspase-3、Bax蛋白水平的变化。结果:转染miR-137 mimics后的乳腺癌细胞中miR-137水平升高,细胞凋亡率升高,细胞侵袭和迁移能力降低,C-caspase-3和Bax的蛋白水平增高,MMP-9蛋白表达减少(P0.05)。萤光素酶报告载体鉴定显示miR-137靶向调控TWIST1,并且miR-137 mimics能够抑制乳腺癌细胞中TWIST1表达。与共转染阴性对照载体和miR-137 mimics的细胞比较,TWIST1过表达载体和miR-137 mimics共转染后的乳腺癌细胞TWIST1和MMP-9蛋白表达水平升高,C-caspase-3和Bax蛋白水平减少,细胞凋亡率降低,细胞侵袭和迁移能力增强(P0.05)。结论:miR-137靶向TWIST1抑制乳腺癌细胞侵袭迁移并诱导细胞凋亡。     

过表达miR-138抑制TCF-4对甲状腺癌细胞CAL-62增殖，凋亡和运动的调节作用

目的　探究过表达miR-138抑制T细胞因子4（TCF-4）对甲状腺癌细胞CAL-62增殖,凋亡和运动的调节作用机制。 方法　转染miR-138 mimic于CAL-62细胞,使用RT-PCR检测miR-138的表达;使用TCF-4构建pcDNA过表达载体转染CAL-62细胞,使用Westen blot检测TCF-4、增殖核抗原67（Ki67）、增殖细胞核抗原（PCNA）、半胱天冬酶3（caspase-3）、半胱天冬酶9（caspase-9）、上皮型钙黏蛋白（E-cadherin）、波形蛋白（Vimentin）和靶基因cycD、c-Myc的表达;使用EDU染色检测细胞增殖;使用Hoechst染色检测细胞凋亡情况;transwell检测细胞侵袭能力。 结果　相比空白组,miR-138转染+TCF-4组caspase-3、caspase-9、Vimentin蛋白表达显著减少,且有显著性差异（P<0.01）;Ki67、PCNA、E-cadherin、cycD、c-Myc蛋白表达显著增加（P<0.01）;甲状腺肿瘤细胞凋亡受到显著抑制（P<0.01）,增殖、侵染受到显著的促进（P<0.01）。相比TCF-4组,miR-138转染+TCF-4组caspase-3、caspase-9、Vimentin蛋白表达显著增加、（P<0.01）;Ki67、PCNA、E-cadherin、cycD、c-Myc蛋白表达显著减少（P<0.01）,抑制了甲状腺肿瘤细胞增殖、侵染（P＜0.01）,凋亡受到了显著的促进（P<0.01）。 结论　表达miR-138抑制TCF-4使得甲状腺癌细胞CAL-62的增殖、侵染受到显著抑制,凋亡受到显著促进。     

miR-449a过表达抑制人神经母细胞瘤细胞SH-SY5Y增殖并促进其凋亡

目的探讨miR-449a对人神经母细胞瘤细胞系SH-SY5Y的增殖和凋亡的影响。方法用Lipofectamine TM2000将miR-449a模似物或miR-449a对照转染至SH-SY5Y细胞,分为空白、miR-449a模似物和miR-449a对照SHSY5Y细胞组;实时荧光定量PCR(q-PCR)检测各组细胞中miR-449a表达;CCK8法检测细胞增殖;流式细胞仪检测细胞凋亡和周期,Western blot检测c-Myc蛋白和Bax/Bcl-2蛋白表达。结果 miR-449a模似物瞬时转染SH-SY5Y细胞后,miR-449a的表达水平明显高于正常对照组(P0.05);SH-SY5Y细胞增殖能力受到明显抑制(P0.05);凋亡率明显增加(P0.05);c-Myc蛋白表达显著降低(P0.05);细胞促凋亡蛋白Bax表达升高;抗凋亡蛋白Bcl-2表达降低(P0.05)。结论 miR-449a可通过c-Myc影响SH-SY5Y细胞的增殖和周期,通过调节Bax/Bcl-2影响其凋亡。     

miR-137对肾癌GRC-1细胞增殖与凋亡的影响

目的 研究miR-137对肾癌GRC-1细胞增殖与凋亡的影响.方法 采用miR-137模拟物转染至肾癌GRC-1细胞,实验分为未转染组(未进行miR-137模拟物转染)、miR-137对照组(转染随机序列)、miR-137转染组(进行miR-137模拟物转染).荧光定量PCR检测各组转染后48h细胞中miR-137表达水平,应用噻唑蓝细胞增殖试验(MTT)、流式细胞检测技术与免疫荧光评价miR-137对肾癌GRC-1细胞增殖和凋亡的影响.结果 转染miR-137模拟物48h后,荧光定量PCR检测发现未转染组、miR-137对照组及miR-137转染组GRC-1细胞中miR-137的相对表达量依次为(24.43±2.03)％、(26.57±2.55)％、和(73.30±3.29)％,差异有统计学意义(P＜0.05).MTT细胞增殖实验与流式细胞仪检测结果显示,与未转染组、miR-137对照组相比,miR-137转染组转染48h后肾癌GRC-1细胞的增殖率显著降低,凋亡率显著升高,差异有统计学意义(P＜0.05),而未转染组、miR-137对照组肾癌GRC-1细胞的增殖率、凋亡率比较差异无统计学意义(P＞0.02).结论 miR-137可明显抑制肾癌GRC-1细胞增殖和促进其凋亡,故有望成为肾癌基因治疗的新靶点.     

miR-7靶向调节EGFR基因对卵巢癌SKOV3细胞增殖和侵袭的影响

目的探讨miRNA-7(miR-7)对卵巢癌SKOV3细胞增殖及侵袭能力的影响。方法将卵巢癌SKOV3细胞分为miR-7抑制剂组、miR-7模拟物组和对照组,分别将miR-7抑制剂或miR-7模拟物转染至miR-7抑制剂组或miR-7模拟物组细胞,对照组细胞转染无关序列,Real-time PCR法检测各组细胞miR-7表达水平,分别用MTT方法与Transwell细胞侵袭实验检测转染后各组SKOV3细胞的增殖与侵袭能力变化。Real-time PCR与Western blot实验分别检测各组细胞EGFR mRNA和蛋白表达水平。结果与对照组相比,miR-7抑制剂组SKOV3细胞miR-7表达水平显著降低,miR-7模拟物组则显著升高(P0.01)。与对照组相比,miR-7抑制剂组SKOV3细胞增殖与侵袭能力显著升高,EGFR mRNA及蛋白表达水平显著升高,miR-7模拟物组则均显著降低(P0.01)。结论 miR-7抑制卵巢癌SKOV3细胞的增殖和侵袭可能与下调EGFR的表达相关。     

miR-101靶向调节c-Fos基因对卵巢癌SKOV3细胞增殖和侵袭的影响

目的探讨miR-101对卵巢癌SKOV3细胞增殖及侵袭能力的影响。方法将卵巢癌SKOV3细胞分为miR-101抑制剂组、miR-101模拟物组和对照组,分别将miR-101抑制剂或miR-101模拟物转染至miR-101抑制剂组或miR-101模拟物组细胞,对照组细胞转染无关序列,Real-time PCR法检测各组细胞miR-101表达水平,分别用MTT方法与Transwell细胞侵袭实验检测转染后各组SKOV3细胞的增殖与侵袭能力变化。Real-time PCR与Western blot实验分别检测各组细胞c-Fos mRNA和蛋白表达水平。结果转染miR-101模拟物后,SKOV3细胞miR-101的表达水平显著升高,SKOV3细胞的增殖与侵袭能力显著降低,c-Fos mRNA及蛋白的表达水平显著降低(P0.01);转染miR-101抑制剂后,SKOV3细胞miR-101的表达水平显著降低,SKOV3细胞的增殖与侵袭能力显著升高,c-Fos mRNA及蛋白的表达水平显著升高(P0.01)。结论 miR-101抑制卵巢癌SKOV3细胞的增殖和侵袭可能与下调c-Fos的表达相关。     

蔓荆子黄素通过上调miR-1193表达调控胃癌细胞的增殖和凋亡

目的:探讨蔓荆子黄素对胃癌细胞增殖、凋亡的影响及可能机制.方法:不同浓度的蔓荆子黄素作用于胃癌细胞AGS后,CCK-8实验和流式细胞术分别检测细胞的增殖和凋亡,RT-qPCR检测miR-1193表达量,Western blot检测CyclinD1、p21、Bcl-2和Bax蛋白表达.将miR-1193模拟物转染至AGS...     

过表达miR-138抑制TCF-4对甲状腺癌细胞CAL-62增殖，凋亡和运动的调节作用

目的　探究过表达miR-138抑制T细胞因子4（TCF-4）对甲状腺癌细胞CAL-62增殖,凋亡和运动的调节作用机制。 方法　转染miR-138 mimic于CAL-62细胞,使用RT-PCR检测miR-138的表达;使用TCF-4构建pcDNA过表达载体转染CAL-62细胞,使用Westen blot检测TCF-4、增殖核抗原67（Ki67）、增殖细胞核抗原（PCNA）、半胱天冬酶3（caspase-3）、半胱天冬酶9（caspase-9）、上皮型钙黏蛋白（E-cadherin）、波形蛋白（Vimentin）和靶基因cycD、c-Myc的表达;使用EDU染色检测细胞增殖;使用Hoechst染色检测细胞凋亡情况;transwell检测细胞侵袭能力。 结果　相比空白组,miR-138转染+TCF-4组caspase-3、caspase-9、Vimentin蛋白表达显著减少,且有显著性差异（P<0.01）;Ki67、PCNA、E-cadherin、cycD、c-Myc蛋白表达显著增加（P<0.01）;甲状腺肿瘤细胞凋亡受到显著抑制（P<0.01）,增殖、侵染受到显著的促进（P<0.01）。相比TCF-4组,miR-138转染+TCF-4组caspase-3、caspase-9、Vimentin蛋白表达显著增加、（P<0.01）;Ki67、PCNA、E-cadherin、cycD、c-Myc蛋白表达显著减少（P<0.01）,抑制了甲状腺肿瘤细胞增殖、侵染（P＜0.01）,凋亡受到了显著的促进（P<0.01）。 结论　表达miR-138抑制TCF-4使得甲状腺癌细胞CAL-62的增殖、侵染受到显著抑制,凋亡受到显著促进。     

miR-129抑制鼻咽癌细胞系CNE2增殖

目的检测miR-129对鼻咽癌细胞系CNE2细胞生物学功能的影响。方法人工合成miR-129模拟物(mimics)和抑制物(inhibitor),转染至鼻咽癌CNE2细胞中,RT-qPCR检测细胞miR-129表达;CCK8法检测细胞增殖;Transwell小室侵袭实验检测细胞侵袭能力;流式细胞仪检测细胞凋亡能力。结果与对照组相比,转染miR-129 mimics组的miR-129表达水平明显升高(P0.05);转染miR-129 inhibitor组的miR-129表达水平均明显降低(P0.05);与对照组相比,转染miR-129 mimics组CNE2细胞增殖能力、侵袭能力显著下降(P0.05),凋亡显著增多(P0.05);与对照组相比,转染miR-129 inhibitor组CNE2细胞增殖能力、侵袭能力显著升高(P0.05),凋亡显著下降(P0.05)。结论 miR-129抑制鼻咽癌细胞系CNE2的增殖和迁移能力,促进细胞凋亡。     

miR-7通过调节AEG-1途径对肝癌细胞增殖、侵袭和迁移的影响

目的分析miR-7对肝癌细胞增殖、侵袭、迁移的影响及其作用机制。方法取对数生长期的HepG-2细胞分为对照组、miR-7模拟物组、转染miR阴性组并选择非肿瘤细胞系HL7702作为HL7702组,依照分组转染miR-7及阴性miR;后使用RT-PCR法检测其中miR-7水平,并检测各组细胞增殖活性、细胞侵袭活性、细胞迁移活性及AEG-1蛋白表达情况。结果 miR-7模拟物组miR-7水平明显高于HepG-2对照组及转染miR阴性组(P0.01);24 h或48 h时miR-7模拟物组细胞增殖活力明显高于HepG-2对照组及转染miR阴性组(P0.01);miR-7模拟物组侵袭细胞数、细胞迁移率及AEG-1蛋白明显低于HepG-2对照组及转染miR阴性组(P0.01)。结论在肝癌细胞中miR-7可通过调控AEG-1途径而有效抑制增殖、侵袭和迁移。     

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.     

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.     

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.     

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.     

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。