Upregulated SLC27A2/FATP2 in differentiated thyroid carcinoma promotes tumor proliferation and migration

BackgroundDifferentiated thyroid carcinoma (DTC) accounts for the vast majority of thyroid cancer (TC) cases. The rapidly increasing incidence of TC requires the urgent identification of new diagnostic and therapeutic targets. Solute carrier family 27 member 2 (SLC27A2/FATP2) plays an essential role in lipid biosynthesis and fatty acid transport. Recent studies have confirmed its involvement in a variety of diseases, including cancer.MethodsIn this study, the expression of SLC27A2 was analyzed in cancer and paracancerous tissue samples from 98 thyroid cancer patients, and we performed ROC analysis to confirm the diagnostic value. CCK8, Transwell, and other methods were used to study its effect on DTC, and the mechanism of SLC27A2 was investigated by RNA sequencing and Western blot.ResultsThe expression of SLC27A2 was upregulated in both DTC tissues and cell lines and was correlated with clinical progression. In vitro studies further confirmed that SLC27A2 knockdown attenuated the proliferation and invasion of DTC cells. Through RNA sequence analysis and gene set enrichment analysis, we found that the MAPK pathway is the main downstream signaling pathway for the regulation by SLC27A2. SLC27A2 affects cell proliferation and differentiation by inducing changes in the proto‐oncogene C‐FOS.ConclusionsOur results show that SLC27A2 plays an important role in tumor proliferation and migration, providing a new putative target for the diagnosis and treatment of TC.     

肺癌合并上腔静脉综合征患者立体定向放射治疗的临床疗效分析

目的 评价立体定向放射治疗肺癌合并上腔静脉综合征（SVCS）的临床疗效。方法采用OUR-QGD型立体定向伽马射线体部治疗系统（体部伽马刀）治疗31例SVCS患者,就诊时病理诊断明确者17例,其中鳞癌7例,腺癌4例,小细胞未分化癌5例,鳞腺癌1例,另14例经胸部CT／MRI影像学检查及临床诊断为右肺癌,未做病理检查。临床表现为颜面及颈胸部浮肿31例,胸闷、气急30例,呼吸困难23例,前胸壁静脉曲张1例。治疗后对患者进行随访,除2例失随访外,其余29例患者均随访至死亡,随访时间为2-20个月,并对治疗结果进行分析。结果 治疗结束时31例患者临床症状、体征均显著改善。获随访的29例患者在治疗后1-6个月后复查CT,达完全缓解（CR）8例,部分缓解（PR）21例,总有效率（CR＋PR）为100％,治疗后中位缓解时间为8．3个月。影像学变化：肿块消失（CR）8例,肿块缩小（PR）21例,总有效率（CR＋PR）为100％。治疗后生存时间最长者为19个月。结论 立体定向放射治疗SVCS疗效满意,治疗时间短,缓解时间长,复发率低,是一种安全有效的治疗方法。     

上海市区大气中真菌污染状况的研究

[目的 ]　调查上海市区大气中真菌污染状况及对策研究。 [方法 ]　采用空气自然沉降法于 1993年 7月～ 1994年 4月调查上海市区大气真菌污染状况。 [结果 ]　单细胞真菌功能区年平均数 7.2 4个 /皿 ,明显低于特殊区年平均数 2 7.30个 /皿 ,功能区单细胞真菌污染以交通、商业区较高 ,居住工业混合区、清洁区较低。多细胞真菌地区分布在不同季节不一致。真菌分布有明显季节性规律 ,单细胞真菌以冬春季为高峰 ,夏秋季降低 ,而多细胞真菌则夏秋季升高 ,冬春季较低。除夏季外 ,大气中单细胞、多细胞真菌数均呈日高夜低的日周期变化规律 ,前者以 10～ 14时为高峰 ,后者高峰随季节变化较大。真菌的空间分布一般以 1.2米处高于 15米处。 [结论 ]　上海市区大气真菌污染有一定地区分布 ,季节性分布规律。单细胞和多细胞真菌分布规律不同。     

A complete sequence of the T. tengcongensis genome

Thermoanaerobacter tengcongensis is a rod-shaped, gram-negative, anaerobic eubacterium that was isolated from a freshwater hot spring in Tengchong, China. Using a whole-genome-shotgun method, we sequenced its 2,689,445-bp genome from an isolate, MB4(T) (Genbank accession no. AE008691). The genome encodes 2588 predicted coding sequences (CDS). Among them, 1764 (68.2%) are classified according to homology to other documented proteins, and the rest, 824 CDS (31.8%), are functionally unknown. One of the interesting features of the T. tengcongensis genome is that 86.7% of its genes are encoded on the leading strand of DNA replication. Based on protein sequence similarity, the T. tengcongensis genome is most similar to that of Bacillus halodurans, a mesophilic eubacterium, among all fully sequenced prokaryotic genomes up to date. Computational analysis on genes involved in basic metabolic pathways supports the experimental discovery that T. tengcongensis metabolizes sugars as principal energy and carbon source and utilizes thiosulfate and element sulfur, but not sulfate, as electron acceptors. T. tengcongensis, as a gram-negative rod by empirical definitions (such as staining), shares many genes that are characteristics of gram-positive bacteria whereas it is missing molecular components unique to gram-negative bacteria. A strong correlation between the G + C content of tDNA and rDNA genes and the optimal growth temperature is found among the sequenced thermophiles. It is concluded that thermophiles are a biologically and phylogenetically divergent group of prokaryotes that have converged to sustain extreme environmental conditions over evolutionary timescale.     

原位肝移植术后胆道充盈缺损性胆系并发症的研究

目的探讨原位肝移植术后胆道充盈缺损性胆系并发症的病因及处理。方法回顾性分析1999年2月至2005年12月完成的325例原位肝移植的临床资料。结果术后发生胆泥3例，胆总管结石10例，胆管铸型综合征6例。MRCP或ERCP诊断准确率为100％，B超诊断准确率为78．9％。11例通过内镜介入取出结石、胆泥或铸型物，手术取石4例，再次肝移植手术4例。结论肝移植术后发生胆道充盈缺损性胆系并发症可能与缺血-灌注损伤、胆道缺血、排斥反应和CMV感染等因素有关。胆道成像技术有助于诊断及鉴别诊断。内镜治疗是首选方法，手术应在介入治疗无效后考虑。     

尺动脉腕上支皮瓣修复手部皮肤缺损

目的 对尺动脉腕上支皮瓣的手术方法进行改进。方法 新鲜成人上肢标本20侧，对前臂尺动脉腕背支进行解剖测量，对皮瓣的切取方法进行改进。临床应用尺动脉腕上支皮瓣修复手掌、手背、小鱼际、大鱼际、拇指的皮肤缺损创面18例，提出了避免皮瓣坏死的方法。结果 15例全部成活，3例大部成活，且对供区的功能影响很小。结论 尺动脉腕上支皮瓣在应用过程中，有许多不确定的干扰因素，应以准确的解剖学知识、丰富的经验为基础灵活掌握。     

维生素E对再灌注心肌损伤的保护作用

SD大鼠60只,分为对照(C)、维生素E(VitE)及超氧化物歧化酶(SOD)3组。结扎左冠状动脉(LCA)5min后开放,心肌再灌注60min。结果:再灌注后C组的左室收缩峰值压持续下降,VitE及SOD组均保持10.7～12.0kPa水平约30min。C及SOD组的室颤(VF)发生率及死亡率明显高于VitE组。心肌电镜形态计量表明VitE组的心肌细胞结构基本完整,证明VitE可保护心肌细胞不受再灌注损伤。     

激光虹膜后粘连松解术106例分析

目的 探讨激光松解虹膜后粘连的有效方法。方法 对因多种原因所致的虹膜后粘连106例139眼分别用Nd:YAG激光，氪激光及二者联合3种方法进行击射以松解粘连。结果 139眼中121眼（87.05%)完全松解，18眼不完全松解。结论 激光虹膜后粘连松解术是一种安全有效的解除虹膜后粘连方法。     

丙氨瑞林对卵巢癌细胞增殖及凋亡的影响

目的：探讨丙氨瑞林对卵巢癌细胞株CoC1／cDDP增殖及凋亡的影响及其作用机制。方法：将丙氨瑞林与CoC1／cDDP一起培养，采用四甲基偶氮唑蓝（MTT）比色法检测细胞增殖抑制率，流式细胞仪进行细胞周期时相及凋亡分析，瑞氏-姬姆萨染色后观察凋亡细胞形态，放射免疫法测定培养液中CA125的变化，半定量RT—PCR法检测作用前后CoC1／cDDP细胞Survivin—△Ex3及Caspase-3 mRNA的表达。结果：（1）随着丙氨瑞林浓度的升高，作用时间的延长，细胞生长抑制率逐渐上升（P〈0．01）。（2）丙氨瑞林作用后的CoC1／cDDP细胞，G0/G1期细胞比例增加，S期及G2/M期细胞比例减少，细胞增殖指数（PI）降低（P〈0．01）；培养液中CA125的水平下降，与PI正相关（r=0．893，P〈0．05）；并且这些变化与丙氨瑞林的浓度相关。（3）作用后亚G1期及Annexin V^＋／PI^-细胞的百分率较对照组明显升高（P〈0．01），并出现明显的凋亡细胞形态的改变；Survivin—△Ex3 mRNA表达与对照组比较无明显变化（P〉0．05），而Caspase-3 mRNA的表达上调，并随着丙氨瑞林浓度的升高而表达增加（P〈0．01），且与亚G1期及Annexin V^＋／PI^-胞的比例呈正相关（r分别为0．994及0．978，P〈0．01）。结论：丙氨瑞林能直接抑制卵巢癌细胞株CoC1／cDDP细胞的增殖，并诱导其凋亡，作用机制与丙氨瑞林上调Caspase-3 mRNA的表达有关。