二亚硝基哌嗪对转基因小鼠TNF受体相关因子2和p16的表达

目的研究二亚硝基哌嗪(N,N′-dinitrosopi- perazine,DNP)对TgN(p53mt-LMP1)/HT小鼠鼻腔和鼻咽黏膜上皮细胞增殖与TNF受体相关因子2(TNF receptor-associated Factor 2,TRAF2)、p16基因表达的影响及两者关系。方法HE染色法观察转基因小鼠组(TC)、转基因小鼠DNP诱导组(T1)和野生小鼠组(CC)、野生小鼠DNP诱导组(CI)鼻腔和鼻咽黏膜上皮细胞增殖特征;免疫组织化学染色法检测小鼠鼻腔和鼻咽黏膜上皮组织中TRAF2、p16基因的表达水平。结果TI、TC、CI和CC组小鼠鼻腔或鼻咽黏膜上皮癌前病变率分别为90%、10%、0和0。与TC、CI和CC组相比,TI组TRAF2基因表达水平显著增高(P<0.01),而p16基因表达水平显著降低(P<0.01);TRAF2和p16基因表达水平在TC和CC组之间的差异亦有统计学意义(P<0.01)。结论TgN(p53mt-LMP1)/HT小鼠鼻腔和鼻咽黏膜上皮细胞增殖活性增加,DNP可提高其增殖活性,而细胞增殖活性增加与TRAF2基因表达水平上调和p16基因表达水平下调密切相关。     

镫骨骨质缺损对听力传导影响的有限元分析

目的建立完善的鼓膜-听骨链模型,利用有限元初步探讨镫骨前、后脚骨质缺损对听力传导的影响。方法实验数据源于对一名无中耳病史的成年男性左侧颞骨进行Micro-CT扫描,在医学影像处理软件Mimics上进行三维重建,利用Geomagic形成需要的曲面,最后在SolidWorks上将成型的鼓膜-听骨链模型进行切割组装,建立正常听骨链模型以及镫骨前、后脚骨质缺损模型,利用模型分析骨质缺损对听力传导的影响。结果建立的鼓膜-听骨链模型镫骨足板频振曲线符合相关文献报道,在镫骨前、后脚骨质缺损病理模型下,曲线与正常中耳模型曲线接近。结论利用多软件综合处理,可建立可信度较高的中耳听骨链模型;有限元模拟分析结果显示,镫骨前、后脚缺损部分骨质,未对听力传导产生明显影响。     

Ultrafast Studies of ZrTe3 by Transient Absorption Spectrometer

Two-dimensional (2D) tri-TMDCs carrier dynamics provide a platform for studying excitons through Ultrafast Pump-Probe Transient Absorption Spectroscopy. Here we studied the ZrTe₃ nanosheets (NTs) exciton dynamics by transient absorption (TA) spectrometer. We observed different carrier dynamics in the ZrTe₃ NTs sample at different pump powers and with many wavelengths in the transient absorption spectrometer. The shorter life decay constant is associated with electron-phonon relaxation. Similarly, the longer-life decay constant represents the long live process that is associated with charge separation. The interactions between carrier-phonons at nanoscale materials can be changed by phonons quantum confinements. The hot carrier lifetime determined the strength of carrier phonon interactions. The value of fast decay in the conduction band is due to carrier relaxation or the carrier gets trapped due to surface states or localized defects. The value of slow decay is due to the recombination of surface state and localized defects processes. The lifetime declines for long wavelengths as size decreases. Whereas, during short wavelength-independent decay, carrier characteristics have been observed. TA spectroscopy is employed to investigate insight information of the carrier’s dynamical processes such as carrier lifetime, cooling dynamics, carrier diffusion, and carrier excitations. The absorption enhanced along excitons density with the increase of pump power, which caused a greater number of carriers in the excited state than in the ground state. The TA signals consist of trap carriers and (electron-hole) constituents, which can be increased by TA changes that rely on photoexcitation and carrier properties.     

头颈肿瘤组织标本库构建的初步研究

目的 探讨头颈肿瘤组织标本的采集、保存,组织库构建方法,以及信息化管理技术。方法 收集手术切除和活检的头颈肿瘤组织、癌旁组织、远端正常组织及患者和正常人外周血标本(分离出血清、血浆、淋巴细胞、干细胞等),置于液氮或-80℃低温冰箱冷冻保存;同时建立一套系统管理组织标本库,使标本库规模化、信息化、智能化。结果 共收集新鲜组织标本220份,血液标本476份。其中肿瘤组织120份(包括肿瘤组织、癌旁组织);非肿瘤组织100份。肿瘤患者血液标本316份,非肿瘤患者血液标本160份。结论 标本库的建立使少见的头颈肿瘤组织标本集约化、规模化,极大提高了标本利用的效率,达到了资源共享的目的。     

江苏省≥10岁人群的眩晕流行病学调查研究

目的调查江苏省人群中眩晕的分布情况及相关因素，为制订防治策略提供科学依据。方法采用按容量比例概率抽样（PPS）方法，在江苏省常住人口中抽样，对其中≥10岁的6854人进行眩晕问卷调查、纯音测听和耳科检查。结果本研究实际接受调查6333人，应答率92．4％，男3035人（47．9％），女3298人（52．1％），年龄10～93岁。被调查人群中眩晕的总体患病率为4．1％（标化患病率：全国3．4％，江苏3．6％），眩晕患病率随年龄增加呈上升趋势（P=0．000）。女性眩晕患病率（5．3％）高于男性（2．8％）（P=0．000），城乡之间差异无显著性（农村4．3％。城镇3．8％．P=0．459）。听力减退、中耳炎病史、噪声暴露史是眩晕的危险因素，OR值分别为2．186、2．135、1．609。结论眩晕在江苏省人群中较为常见，其发生与多种因素有关，必须加强这些方面的防治研究。     

90例防盲小切口白内障体会

目的：探讨经角膜缘后2mm“一字形”巩膜隧道切口行小切口非超声乳化+人工晶体植入术,在防盲中的治疗效果及应用价值。方法在开展防盲工作中90例（90眼）白内障手术,做“一字形”巩膜隧道小切口,连续环形撕囊或截囊,水分离,用圈套器脱出晶状体核,注吸皮质,囊袋内植入人工晶状体,切口不予缝合。结果术后第一天裸眼视力≥0.3者52眼(57.8％),0.05-0.3者29眼(32.2％),≤0.05者9眼(10％)。术后一月裸眼视力≥0.3者74眼(82.2％),0.05-0.3者11眼(12.2％),≤0.05者5眼(5.6％)。术后三个月时裸眼视力≥0.3者83眼(92.2％),0.05-0.3者6眼(6.7％),≤0.05者1眼(1.1％)。术后1个月角膜散光为(1.30±0.47)D,术后3个月角膜散光为(0.82±0.52)D,与术前比较（0.8.±0.64D）差异无统计学意义(P>0.05)。结论手法小切口自内障+人工晶体植入术,设备简单,易于掌握,手术费用低,疗效可靠。适合基层医院全面开展,是一种可行手术方式。     

Light Emitting Diodes Irradiation Regulates miRNA-877-3p to Promote Cardiomyocyte Proliferation

Mammalian cardiomyocytes (CMs) maintain a low capacity for self-renewal in adulthood, therefore the induction of CMs cycle re-entry is an important approach to promote myocardial repair after injury. Recently, photobiomodulation (PBM) has been used to manipulate physiological activities of various tissues and organs by non-invasive means. Here, we demonstrate that conditioned PBM using light-emitting diodes with a wavelength of 630 nm (LED-Red) was capable of promoting the proliferation of neonatal CMs. Further studies showed that low-power LED-Red affected the expression of miR-877-3p and promoted the proliferation of CMs. In contrast, silencing of miR-877-3p partially abolished the pro-proliferative actions of LED-Red irradiation on CMs. Mechanistically, GADD45g was identified as a downstream target gene of miR-877-3p. Conditioned LED-Red irradiation also inhibited the expression of GADD45g in neonatal CMs. Moreover, GADD45g siRNA reversed the positive effect of LED-Red on the proliferation of neonatal CMs. Taken together, conditioned LED-Red irradiation increased miR-877-3p expression and promoted the proliferation of neonatal CMs by targeting GADD45g. This finding provides a new insight into the role of LED-Red irradiation in neonatal CMs biology and suggests its potential application in myocardial injury repair.     

Hippo pathway monomerizes STAT3 to regulate prostate cancer growth

Prostate cancer ranks among the most commonly diagnosed malignancies for men and has become a non‐negligible threat for public health. Interplay between inflammatory factors and cancer cells renders inflammatory tissue environment as a predisposing condition for cancer development. The Hippo pathway is a conserved signaling pathway across multiple species during evolution that regulates tissue homeostasis and organ development. Nevertheless, whether Hippo pathway regulates cancer‐related inflammatory factors remains elusive. Here, we show that high cell density–mediated activation of the Hippo pathway blunts STAT3 activity in prostate cancer cells. Hippo pathway component MST2 kinase phosphorylates STAT3 at T622, which is located in the SH2 domain of STAT3. This phosphorylation blocks the SH2 domain in one STAT3 molecule to bind with the phosphorylated Y705 site in another STAT3 molecule, which further counteracts IL6‐induced STAT3 dimerization and activation. Expression of a nonphosphorylatable STAT3 T622A mutant enhances STAT3 activity and IL6 expression at high cell density and promotes tumor growth in a mice xenograft model. Our findings demonstrate that STAT3 is a novel phosphorylation substrate for MST2 and thereby highlight a regulatory cascade underlying the crosstalk between inflammation and the Hippo pathway in prostate cancer cells.     

嘎日迪-13对局灶性脑缺血大鼠NSE、TNF-α、IL-6表达的影响

目的探讨血清中神经元特异性烯醇化酶(NSE)、炎性因子肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)在大鼠脑缺血损伤后的作用及嘎日迪-13对其影响。方法取雄性SD大鼠360只,将大鼠随机分为脑缺血模型组、假手术组及嘎日迪-13大、中、小剂量(0.24、0.12、0.06 g/kg)组,每组又随机分为缺血1、6、12、24、72、120 h的6个时相组,采用改良Zea Longa线栓法制备大鼠大脑中动脉栓塞(MCAO)模型,ELISA法检测血清中NSE、TNF-α、IL-6水平。结果NSE、TNF-α、IL-6在假手术组表达少;而在模型组脑缺血损伤1 h后开始上升,NSE于12 h达高峰,TNF-α、IL-6在24 h达高峰,之后逐渐下降(P0.01);嘎日迪-13各剂量治疗组能显著降低神经功能评分,NSE、TNF-α、IL-6表达量明显受到抑制(P0.01、0.05)。结论嘎日迪-13对大鼠脑缺血损伤具有明显的保护作用,提示嘎日迪-13可能是通过减轻脑缺血损伤后神经元的损伤,调节炎症因子相互之间的作用,减轻脑组织损伤,从而发挥对脑缺血损伤的治疗作用。     

超微粉碎麻术散治疗无症状高尿酸血症49例临床观察

超微粉碎麻术散由麻黄、苍术、茯苓、萆薄、杜仲、百合、桑枝7味药物经超微粉碎技术加工而成,具有疏通经络,祛除风湿功用。2007年2月至2008年3月,笔者选择了无症状高尿酸血症患者49例,予验方超微粉碎麻术散口服治疗;并与苯溴马隆口服治疗49例对照观察,现报告如下。