Taking advantage of high-throughput sequencing technology, a large number of long noncoding RNAs （lncRNAs） have been recently characterized. Emerging evidence suggests that they play critical roles in diverse biological processes, including the differentiation of skeletal muscle cells. As previous studies have focused mainly on the polyadenylated lncRNAs, the involvement of polyA-rninus IncRNAs in myocyte differentiation remains largely unexplored. To this aspect, their expression and regulation were examined in the present study. During the course of myocyte differentiation of C2C12 cells, polyA-minus RNAs were isolated and analyzed by RNA-seq. In addition to identifying 904 novel polyA-minus lncRNAs, their temporal expression was further characterized in this process. For many lncRNAs, differentiation-specific profiles were revealed. Based on their unique expression profiles, these lncRNAs were grouped into nine regulation categories. Taken together, our study greatly contributed to the identification of a dynamic regulation ofpolyA-minus lncRNAs, and clarified their potential roles in myocyte differentiation.
目的：探讨腹腔镜宫颈癌根治手术的可行性、安全性及优势。方法回顾性分析2005年1月～2010年3月广泛子宫切除＋盆腹腔淋巴结切除术治疗的早期宫颈癌（ⅠB～ⅡA期）患者资料，根据患者年龄、肿瘤分期、肿瘤组织学类型和淋巴结转移情况对接受腹腔镜和开腹手术的患者进行1∶1配对病例对照分析，2组各21例。比较2组手术指标、术后病理结果及随访结果。结果2组手术时间及并发症发生率差异无显著性，腹腔镜组术中出血少[（233．3±202．1） ml vs．（983.3±462．2）ml，t＝-6．814，P＝0．000]，术后排气早[（41．0±13．9）h vs．（55．4±15．0）h，t＝-3．219，P＝0．003]，但清扫盆腹腔淋巴结数量较少[（19．7±8．2）枚vs．（27．5±7．7）枚，t＝-3．170，P＝0．003]，术后留置尿管时间较长[（31．8±23．4） d vs．（14．5±4.7）d，t＝3．177，P＝0．005]。失访腹腔镜组13例，开腹组12例，其余17例中位随访时间53个月（53～107个月），肿瘤复发率差异无显著性[0（0／8） vs．11．1％（1／9），P＝1．000]。结论腹腔镜早期宫颈癌根治手术是安全可行的，在严格把握手术适应证的情况下，可替代开腹手术。腹腔镜手术还具有术中失血少、术后恢复快等优势。经过中期随访观察，效果满意。
