maspin和bax联合检测对乳腺癌复发的研究

目的：研究乳腺癌组织中mas pin和bax的表达,探讨二者预测乳腺癌复发的价值。方法：采用SP免疫组织化学方法检测30例复发乳腺癌、24例无复发乳腺癌及14例乳腺纤维腺瘤组织中maspin和bax的表达情况。结果：复发乳腺癌（23.3%,20.0%）和无复发乳腺癌组织（54.2%,45.8%）maspin、bax阳性表达率均较乳腺纤维腺瘤组织（85.7%,78.6%）低（P均〈0.05）,复发乳腺癌maspin和bax阳性表达明显低于无复发乳腺癌（P〈0.01）。复发乳腺癌组织maspin表达与组织学分级呈负相关（r=-0.481,P〈0.05）,与激素受体呈正相关（r=0.497,P〈0.05）;bax表达与组织学分级呈负相关（r=-0.522,P〈0.05）;maspin表达与bax表达呈正相关﹙r=0.454,P〈0.05﹚。结论：maspin、bax的异常表达可能在乳腺癌的发生、发展过程中起重要作用,联合检测能更好地判断乳腺癌的复发。     

骨髓间充质干细胞联合血管内皮生长因子基因治疗肢体缺血的实验研究

目的 观察骨髓间充质干细胞(bone mesenchymal stem cell,BMSC)联合血管内皮生长因子(vascular endothelial growth factor,VEGF)基因治疗对家兔肢体缺血模型的疗效.方法 切除新西兰兔右后肢全长股浅动脉并结扎股深动脉以建立兔后肢缺血模型,随机分为空质粒对照组(EP组)、骨髓间充质干细胞组(BMSC组)、VEGF基因治疗组(VEGF组)及联合治疗组(BV组),每组各8只.分别于治疗后28 d及30 d进行动脉造影及VEGF免疫组化染色.结果 EP组、BMSC组及VEGF组的新生血管计数组间比较差异无统计学意义(P＞0.05).BV组的新生血管计数较其余3组明显增加,差异有统计学意义(F=35.47,P＜O.01).BMSC组及VEGF组的VEGF免疫组化染色呈阳性表达,与EP组比较差异有统计学意义(F=764.32,P＜0.01).BV组的VEGF免疫组化染色呈强阳性表达,与其余3组比较差异有统计学意义(F =764.32,P＜0.01).结论 BMSC联合VEGF基因治疗兔肢体缺血可使VEGF获得稳定而有效的表达,从而改善肢体缺血.     

弹性髓内钉治疗青少年锁骨骨折的临床应用

目的:探讨弹性髓内钉治疗青少年锁骨骨折的方法和临床疗效。方法:2008年10月至2009年11月,采用弹性髓内钉治疗17例青少年急性锁骨骨折,男11例,女6例;年龄12～18岁,平均15.3岁。伤后至手术时间2～7 d,平均3.5 d。对术前和术后3个月随访时的肩关节Constant评分、术前和术后2周肩关节活动度进行比较,并通过X线片检查观察患者骨折愈合及复位情况。结果:所有患者均获得随访,时间3～8个月,平均6.5个月。没有出现感染、TEN断裂及顶破皮肤等并发症。术后3个月Constant评分(85.6±4.3)分,较术前(45.3±6.1)分明显提高(t=22.164,P<0.01)。术后2周肩关节活动度较术前明显改善(P<0.01)。术后12～16周取出髓内钉X线片显示骨性愈合,肩关节活动度恢复良好。结论:弹性髓内钉治疗青少年锁骨骨折具有疗效良好,创伤小,固定可靠等优点,其为锁骨骨折青少年治疗提供一种可靠的选择。     

The effect of noncoherent red light irradiation on proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells

Mesenchymal stem cells (MSCs) are promising for use in regenerative medicine. Low-level light irradiation (LLLI) has been shown to modulate various processes in different biological systems. The aim of our study was to investigate the effect of red light emitted from a light-emitting diode (LED) on bone marrow MSCs with or without osteogenic supplements. MSCs both with and without osteogenic supplements were divided into four groups, and each group was irradiated at doses of 0, 1, 2 and 4 J/cm². Cellular proliferation was evaluated using WST-8 and 5-ethynyl-2′-deoxyuridine (EdU) fluorescence staining. The alkaline phosphatase activity, mineralization, and expression of osteoblast master genes (Col1α1, Alpl, Bglap and Runx2) were monitored as indicators of MSC differentiation towards osteoblasts. In groups without osteogenic supplements, red light at all doses significantly stimulated cellular proliferation, whereas the osteogenic phenotype of the MSCs was not enhanced. In groups with osteogenic supplements, red light increased alkaline phosphatase activity and mineralized nodule formation, and stimulated the expression of Bglap and Runx2, but decreased cellular proliferation. In conclusion, nonconherent red light can promote proliferation but cannot induce osteogenic differentiation of MSCs in normal media, while it enhances osteogenic differentiation and decreases proliferation of MSCs in media with osteogenic supplements.     

Klinefelter综合征患者睾酮水平与内皮祖细胞的相关性分析

目的:分析Klinefelter综合征患者的睾酮水平与循环内皮祖细胞间的相关性及其临床意义。方法:选取在本院就诊的36例非嵌合体核型47,XXY的患者,且患者均伴有一个或多个心血管危险因素。放免法检测相关激素水平,并测定循环内皮祖细胞含量;予以睾酮替代疗法6个月后,复查激素水平及循环内皮祖细胞含量。结果:予以睾酮替代治疗后,患者睾酮水平由(8±3)nmol/L升高至(24±10)nmol/L,循环内皮祖细胞含量为(41±48)cells/ml,未见明显升高。结论:Klinefelter综合征患者睾酮水平与循环内皮祖细胞含量无明显相关性。     

经椎旁肌间隙入路短节段结合伤椎固定治疗胸腰椎骨折

目的:探讨椎旁肌间隙入路短节段固定结合伤椎固定在胸腰椎手术中的优越性和临床应用价值。方法:2007年1月至2010年3月,采用椎旁肌间隙入路短节段固定结合伤椎固定胸腰椎骨折患者27例,男19例,女8例;年龄21～57岁,平均36.3岁。按照Magerl等分型:A2型5例,A3型14例,B1型3例,B2型5例。按Frankel神经功能分级:D级6例,E级21例。比较术前、术后及末次随访时X线片及CT,对伤椎椎体压缩百分率、Cobb角、椎管占位等情况进行随访;通过Frankel标准对神经功能进行评定。结果:所有病例获得随访,时间12～28个月,平均19.6个月。椎体压缩百分率由术前的(46.6±10.5)%恢复至术后的(5.2±3.7)%,末次随访时的(6.7±4.6)%,术后与术前比较差异有统计学意义(P<0.05),末次随访时与术后比较差异无统计学意义(P>0.05);伤椎Cobb角由术前的(18.3±7.2)°矫正至术后(5.3±5.1)°,末次随访时的(7.1±3.1)°,术后与术前比较差异有统计学意义(P<0.05),末次随访时与术后比较差异无统计学意义(P>0.05);椎管占位率由术前的(30.2±7.2)%恢复至术后的(6.3±4.2)%,末次随访时的(7.2±4.5)%,术后与术前比较差异有统计学意义(P<0.05),末次随访与术后比较差异无统计学意义(P>0.05)。其中3例神经功能D级患者恢复至E级。结论:经椎旁肌间隙入路短节段结合伤椎固定治疗胸腰椎骨折具有操作简单,置钉容易,手术时间短,出血少,同时复位良好,术后稳定可靠,是治疗胸腰椎骨折的有效方法。     

改良负压封闭引流技术治疗小腿中下段顽固性窦道

目的:探讨改良负压封闭引流技术治疗小腿中下段顽固性窦道的疗效。方法:2010年1月至2011年12月,11例小腿中下段顽固性窦道的患者,男7例,女4例;年龄23～56岁,平均34.5岁;采用彻底病灶清理后持续闭合灌洗结合改良负压封闭引流技术治疗,治疗14～21d后拆除负压封闭引流装置行2次扩创缝合。结果:术后感染得到控制,小腿中下段窦道均顺利愈合。11例患者均获随访,时间6～14个月,平均10个月,未见复发。结论:改良负压封闭引流技术是治疗小腿中下段顽固性窦道一种有效方法。     

Management of drug-resistant spinal tuberculosis with a combination of surgery and individualised chemotherapy: a retrospective analysis of thirty-five patients

Purpose

Drug-resistant tuberculosis is a major public-health concern globally and can be difficult to manage clinically. Spinal tuberculosis is the most common manifestation of extrapulmonary tuberculosis. However, there have been few reports on the topic of drug-resistant spinal tuberculosis. The aim of this study was to investigate the clinical characteristics and drug susceptibility patterns and the outcomes of management with a combination of surgery and individualised chemotherapy, for drug-resistant spinal tuberculosis.

Methods

We retrospectively analysed 35 patients with drug-resistant tuberculous spondylitis. After surgery, individualised chemotherapy was tailored for each patient according to the drug-resistance profile and previous history of chemotherapy. The patients were followed up clinically and radiologically for an average period of 35.8 months.

Results

Among 35 drug-resistant spinal tuberculosis cases, 13 were retreatment cases. Twelve were multi-drug resistant tuberculosis (MDR-TB), and 23 were non-MDR-TB. The patients with MDR-TB and non-MDR-TB had undergone previous chemotherapy for an average of 14.50 ± 2.00 (0–60) months and 4.56 ± 1.54 (0–74) months, respectively. A total of 32 cases underwent open operations, and the other three had percutaneous drainage and local chemotherapy. Patients received individualised chemotherapy for an average of 23.6 months postoperatively. Local recurrence was observed in six patients. Thirty-three patients had been cured at the final follow-up, and the other two were still receiving chemotherapy.

Conclusions

Drug-resistant tuberculous spondylitis is mainly acquired through previous irregular chemotherapy and the spreading of drug-resistant strains. Management with a combination of surgery and individualised chemotherapy is feasible in the treatment of severe complications and the prevention of acquired drug resistance.     

CXCR4 RNA干扰序列筛选及对结肠癌细胞SW480生长的影响

目的筛选细胞表面趋化因子受体（CXCR4） RNA干扰高效序列,探讨其对SW480细胞生长的影响。方法采用RT-PCR和Western blot方法选择最有效的CXCR4 RNA干扰序列,流式细胞术分析转染该序列后SW480细胞生长情况。结果 sihCXCR4-3序列可使CXCR4 RNA相对含量仅为SW480组的5.4%,CXCR4蛋白相对表达量为18.95%。sihCXCR4-3组细胞数[（0.92±0.06）×105]低于SW480细胞组[（1.38±0.04）×105,P=0.0050]及NCsihCXCR4组[（1.28±0.05）×105,P=0.0256];相对SW480组和NCsihCXCR4组,sihCXCR4-3组的抑制率分别为33.03%及28.00%。sihCXCR4-3组G1期百分率明显低于SW480细胞组[（59.5±0.57）%vs.（74.11±0.54）%,P=0.0167];S期百分率高于SW480组[（23.85±0.24）%vs.（14.62±0.46）%,P=0.0305]和NCsihRNA组[（17.63±0.48）%,P=0.0013]。结论 sihCXCR4-3序列可高效沉默CXCR4基因表达,抑制SW480细胞生长。     

带锁髓内钉辅以锁定钢板加植骨治疗股骨干骨折钢板固定术后骨不连

目的评价带锁髓内钉辅以锁定钢板加植骨治疗股骨干骨折钢板固定术后骨不连的临床疗效。方法对33例股骨干骨折钢板螺钉内固定术后不愈合的患者采用切开复位带锁髓内钉辅助侧方锁定钢板内固定加植骨治疗。结果 33例均获随访,时间6～18个月。患者骨折均愈合。结论采用带锁髓内钉辅以锁定钢板加植骨治疗股骨干骨折钢板固定术后骨不连,固定稳定、可靠,骨折愈合率高,术后膝关节可早期功能锻炼,临床疗效满意。