长链非编码RNA核富集转录体1促进喉鳞状细胞癌细胞迁移和侵袭的机制研究

目的 探究长链非编码RNA(lncRNA)核富集转录体1(NEAT1)NEAT1对喉鳞状细胞癌(LSCC)细胞迁移和侵袭的影响,并进一步分析miR-429/锌指E-盒结合同源异形盒1(ZEB1)轴在其中发挥的作用。方法 慢病毒转染建立稳定敲减lncRNA NEAT1的LSCC细胞,通过RT-qPCR检测细胞lncRNA NEAT1表达以验证转染效率,通过Transwell实验检测细胞迁移和侵袭能力,通过Western blot检测细胞上皮-间充质转化(EMT)相关蛋白N-cadherin、Vimentin、Slug和Snail表达。通过生物信息学分析miR-429与lncRNA NEAT1和ZEB1 mRNA间的潜在结合位点,并通过双荧光素酶报告基因实验验证miR-429与lncRNA NEAT1以及miR-429与ZEB1 mRNA结合。将miR-429抑制剂转染敲减lncRNA NEAT1的LSCC细胞,通过Western blot检测细胞ZEB1表达。进一步检查敲减ZEB1对抑制miR-429的敲减lncRNA NEAT1的LSCC细胞迁移、侵袭和EMT的影响。结果 敲减lncRNA NEAT1降低LSCC细胞lncRNA NEAT1表达,抑制细胞迁移和侵袭并下调细胞N-cadherin、Vimentin、Slug和Snail表达。miR-429与lncRNA NEAT1和ZEB1 mRNA间存在潜在结合位点,且miR-429与lncRNA NEAT1以及miR-429与ZEB1 mRNA结合。抑制miR-429逆转了敲减lncRNA NEAT1对LSCC细胞ZEB1表达的抑制作用。此外,敲减ZEB1逆转了抑制miR-429对敲减lncRNA NEAT1的LSCC细胞迁移和侵袭的促进作用及EMT相关蛋白N-cadherin、Vimentin、Slug和Snail表达的上调作用。结论 lncRNA NEAT1促进LSCC细胞迁移和侵袭,其机制可能与海绵化miR-429上调ZEB1表达促进LSCC细胞EMT有关。     

重复经颅磁刺激对抑郁症患者的抑郁程度和HPA轴的影响

目的探讨重复经颅磁刺激对抑郁症患者的抑郁程度和下丘脑-垂体-肾上腺（HPA）轴活性的影响。方法采取双盲对照试验方案,将确诊的40例抑郁症患者随机分入工组（治疗组）和Ⅱ组（假刺激对照组）,每组治疗10天。在治疗前及治疗结束后当天检测Hamilton抑郁量表（HAMD）积分、血清皮质醇（CORT）及血清促肾上腺皮质激素（ACTH）浓度。结果治疗前全组的HAMD积分与血清CORT（r=0．948）和ACTH（r=0．971）浓度和治疗后治疗组的HAMD积分与血清CORT（r=0．920）和ACTH（r=0．978）浓度间均呈显著正相关关系（均P〈0．05）。治疗前两组的HAMD积分（t〈0．001）、血清CORT（t=-0．328）和ACTH（t=-0．228）浓度无统计学差异（均P〉0．05）;治疗后两组的上述指标均有统计学差异（P〈0．05）。结论抑郁症患者的抑郁程度与其血清CORT和ACTH浓度呈正相关。rTMS有改善抑郁症状的作用,其抗抑郁作用的机制可能与其下调HPA轴的活性有关。     

针刺联合氟西汀对卒中后抑郁症疗效及HPA轴功能的影响

目的:观察针刺联合氟西汀治疗卒中后抑郁症(PSD)的疗效并探讨其神经内分泌机制。方法:40例PSD患者随机分为两组,对照组20例单纯使用氟西汀治疗6周,研究组20例采用针刺结合氟西汀治疗6周。观察两组疗效和治疗前后血浆ACTH、CORT的含量变化。结果:治疗后两组临床疗效和ACTH、CORT值均有明显改善,研究组尤甚(P<0.05或0.01)。结论:针刺联合药物治疗PSD和单纯使用药物治疗相比,能够更好地改善患者的抑郁状态,其机理可能与抑制下丘脑-垂体-肾上腺(HPA)轴功能亢进有关。     

35 GHz毫米波急性辐照小鼠诱发丘脑-垂体-肾上腺皮质轴功能改变和Th1/Th2失衡

目的 观察35 GHz毫米波诱发的急性应激反应中重要细胞因子及下丘脑-垂体-肾上腺皮质(HPA)轴相关激素的表达规律,旨在探索神经-内分泌-免疫系统之间内在的关联。方法 以420 mW/cm²功率密度的35 GHz毫米波源急性辐照BALB/c小鼠60 s。于照后不同时间,用ELISA方法检测血清中IFN-γ、IL-4等细胞因子的表达水平,并用RT-PCR和免疫组织化学方法检测下丘脑促肾上腺皮质素释放激素(CRH)和海马区糖皮质激素受体(GR)的变化。结果 Th1和Th2型细胞因子IFN-γ和IL-4在照后3 d均升高至峰值(t=-6.59、-2.28,P<0.05),至照后7 d仍明显高于对照组;其比值在照后1和3 d明显增高,即发生了明显的Th1/Th2平衡向Th1免疫反应漂移的现象。毫米波急性辐照后下丘脑CRH mRNA含量出现持续性升高,至7 d升高至峰值(t=-7.03,P<0.05);而海马GR mRNA含量在3 d达到峰值后迅速降低至对照组水平。下丘脑CRH和海马GR蛋白表达的趋势与其mRNA水平变化基本一致。结论 小鼠经35 GHz毫米波急性辐照后,Th1/Th2平衡向Th1方向偏移;同时应激增加的下丘脑CRH和海马GR对IFN-γ等因子的反馈抑制,使向Th1偏移的免疫失衡现象得以改善,可缓解过度应激造成的免疫损伤。     

基于OPG/RANK/RANKL信号轴探讨中医“瘀证”与骨质疏松症之间的关系

近年来,随着中医学的不断发展,中医药在治疗骨质疏松症(osteoporosis,OP)中的应用愈加广泛,然而由于只有单纯的中医理论指导,而缺乏现代科学依据的支撑,故而广受争议。与此同时,OPG/RANK/RANKL信号轴的发现又是现代分子生物学的一大突破。因此,笔者立足于中西医结合的角度,基于中医脏腑亏虚立论,从OPG/RANK/RANKL信号调控机制探讨中医学从"瘀证"论治骨质疏松症的合理性,从而为中医从"瘀"辨治OP以及临床研究提供科学理论依据。     

通辽与长春两地区成人枢椎的测量

[1]目的 了解枢椎形态和结构的性别和地区差异.[2]方法 对通辽与长春两地区129套成人枢椎(男76套,女53套)进行了测量,指标包括齿突高、全高、椎体高、矢径、全宽、椎孔矢径和椎孔横径,并计算了椎体指数和椎孔指数.对所得数据进行统计学处理.[3]结果 枢椎的7项测量指标,除椎孔矢径与横径(长春地区的椎孔横径除外)以及通辽地区齿突高外,其性别差异均具极显著性(t＝2.34~7.68,p<0.01或0.05);两地区比较,除女性齿突高外,其他指标差异均无显著性(t＝0.03~1.95,p均>0.05).指数比较,除两地区女性椎体指数外,均无性别和地区间差异(t＝0.04~1.86,p均>0.05).[4]结论 通辽和长春两地区成人枢椎的形态和结构无明显差异.     

“脑-肠-菌”轴在肠易激综合征发病中的作用

肠易激综合征（IBS）的发病涉及肠道动力障碍、内脏感觉过敏、肠道炎症和免疫反应、精神心理因素等。近年来,脑-肠-菌轴（BGMA）在IBS发病中的作用引起重视,上述的发病因素均可通过神经-免疫-内分泌网络调控方式整合到脑-肠-菌互动框架中进行描述,而且肠道菌群在IBS疾患进程中扮演重要角色。本文从BGMA的组成及其异常在IBS发病中的作用做一综述。     

Dried Plum’s Polyphenolic Compounds and Carbohydrates Contribute to Its Osteoprotective Effects and Exhibit Prebiotic Activity in Estrogen Deficient C57BL/6 Mice

Evidence of dried plum’s benefits on bone continues to emerge. This study investigated the contribution of the fruit’s polyphenol (PP) and carbohydrate (CHO) components on a bone model of postmenopausal osteoporosis to explore their prebiotic activity. Osteopenic ovariectomized mice were fed diets supplemented with dried plum, a crude extract of dried plum’s polyphenolic compounds, or the PP or CHO fraction of the crude extract. The effects of treatments on the bone phenotype were assessed at 5 and 10 weeks as well as the prebiotic activity of the different components of dried plum. Both the CHO and PP fractions of the extract contributed to the effects on bone with the CHO suppressing bone formation and resorption, and the PP temporally down-regulating formation. The PP and CHO components also altered the gut microbiota and cecal short chain fatty acids. These findings demonstrate that the CHO as well as the PP components of dried plum have potential prebiotic activity, but they have differential roles in mediating the alterations in bone formation and resorption that protect bone in estrogen deficiency.     

枕颈融合联合鼻内镜治疗枢椎肿瘤

目的探讨枕颈融合联合鼻内镜技术行颈椎重建和肿瘤切除治疗枢椎肿瘤的疗效及其预后。方法2005年7月以来,共收治5例枢椎肿瘤,采取后路枕颈融合联合前路鼻内镜肿瘤切除术治疗。结果5例患者术后颈椎稳定性均得到满意重建,肿瘤切除充分。其中2例瘫痪患者术后JOA评分较术前明显增加。结论枕颈融合联合鼻内镜技术治疗枢椎肿瘤,肿瘤切除率高,并发症低,为高颈段肿瘤的治疗提供了新的临床思路。     

Bifidobacterium animalis ssp. lactis MG741 Reduces Body Weight and Ameliorates Nonalcoholic Fatty Liver Disease via Improving the Gut Permeability and Amelioration of Inflammatory Cytokines

Diet-induced obesity is one of the major causes of the development of metabolic disorders such as insulin resistance and nonalcoholic fatty liver disease (NAFLD). Recently, specific probiotic strains have been found to improve the symptoms of NAFLD. We examined the effects of Bifidobacterium animalis ssp. lactis MG741 (MG741) on NAFLD and weight gain, using a mouse model of high-fat-diet (HFD)-induced obesity. HFD-fed mice were supplemented daily with MG741. After 12 weeks, MG741-administered mice exhibited reduced fat deposition, and serum metabolic alterations, including fasting hyperinsulinemia, were modulated. In addition, MG741 regulated Acetyl-CoA carboxylase (ACC), fatty acid synthase (FAS), sterol regulatory element-binding protein 1 (SREBP-1), and carbohydrate-responsive element-binding protein (ChREBP) expression and lipid accumulation in the liver, thereby reducing the hepatic steatosis score. To determine whether the effects of MG741 were related to improvements in gut health, MG741 improved the HFD-induced deterioration in gut permeability by reducing toxic substances and inflammatory cytokine expression, and upregulating tight junctions. These results collectively demonstrate that the oral administration of MG741 could prevent NAFLD and obesity, thereby improving metabolic health.