Oncogene Mdm2 takes part in hepatocarcinogenesis

1　ＩＮＴＲＯＤＵＣＴＩＯＮＭｕｔａｔｉｏｎｓｉｎｔｈｅｐ53ｇｅｎｅａｒｅｔｈｅｍｏｓｔｃｏｍｍｏｎａｌｔｅｒａｔｉｏｎｆｏｕｎｄｉｎｈｕｍａｎｍａｌｉｇｎａｎｔｔｕｍｏｒｓ[1,2 ] .ＢｕｔｔｈｅｒｅｈａｖｅｂｅｅｎｆｅｗｒｅｐｏｒｔｓａｂｏｕｔｔｈｅｅｆｆｅｃｔｏｆＭｄｍ 2-ｉｎｄｕｃｅｄＰ53ｉｎａｃｔｉｖａｔｉｏｎｉｎｈｕｍａｎＨＣＣ .Ｗｅａｎａ ｌｙｚｅｄｔｈｅｐ53ｇｅｎｅｍｕｔａｔｉｏｎｓｉｎｅｘｏｎｓ 5～ 8ｂｙｐｏｌｙ ｍｅｒａｓｅｃｈａｉｎｒｅａｃｔｉｏｎ -ｓｉｎｇｌｅｓｔｒａｎｄｃｏｎｆ…     

异丙酚对人脐静脉内皮细胞凋亡相关基因Bcl-2及Bax表达的影响

目的 :观察异丙酚 (Propofol)及肿瘤坏死因子 α(TNF α)对培养的人脐静脉内皮细胞 (HUVECs)凋亡相关基因Bcl 2及Bax表达的影响 ,探讨异丙酚抑制凋亡的机理。方法 :将培养的人脐静脉内皮细胞 3～ 4代于融合状态 ,随机分为 7组 :对照组 (P0 ) ,2 5 μmol/L异丙酚组 (P2 5) ,TNF α组 (P0 +TNF α) ,12 .5 μmol/L异丙酚和TNF α组 (P12 .5+TNF α) ,2 5 μmol/L异丙酚和TNF α组 (P2 5+TNF α) ,5 0 μmol/L异丙酚和TNF α组 (P50 +TNF α) ,10 0 μmol/L异丙酚和TNF α组 (P10 0 +TNF α)。各组加入相应药物培养 2 4h后收获细胞 ,采用免疫细胞化学染色方法测定Bcl 2及Bax蛋白表达。结果 :与对照组 (P0 )相比 ,异丙酚 2 5 μmol/L组 (P2 5)Bcl 2及Bax蛋白表达无明显变化 (P >0 .0 5 ) ;TNF α(P0 +TNF α)组Bcl 2蛋白表达降低 ,Bax蛋白表达升高 (P <0 .0 0 1) ;而不同浓度的异丙酚预处理后再加入肿瘤坏死因子的各组 (P12 .5+TNF α、P2 5+TNF α、P50 +TNF α、P10 0 +TNF α)Bcl 2蛋白表达增加 ,Bax蛋白表达降低 (P <0 .0 5或P <0 .0 1)。结论 :临床相关浓度的异丙酚可通过调节Bcl 2及Bax蛋白表达抑制TNF α诱导的内皮细胞凋亡     

乙肝病毒感染患者胆囊胆汁成分改变及其临床意义

目的：探讨乙肝病毒感染与胆石形成的关系。方法：收集38例乙肝病毒感染患者和35例非乙肝病毒感染者的胆囊内胆汁,对其胆红素、胆汁脂类、钙离子进行检测。结果：乙肝病毒感染患者胆囊胆汁的非结合性胆红素、钙离子明显高于对照组（P＜0.01,P＜0.05）,总胆汁酸、胆固醇明显低于对照组（P＜0.01）。结论：乙肝病毒感染患者胆囊胆汁成分改变与胆石症发病率增高有密切关系。     

慢性胰腺炎K—ras基因突变的临床病理学意义

目的：探讨慢性胰腺炎K－ras基因突变的临床病理学意义。方法：9例手术切除的慢性胰腺炎的石蜡标本,用微解剖法分离慢性胰腺炎的胰导管上皮粘液细胞增生灶,提取,扩增DNA,用ASO斑点杂交检测K－ras基因第12密码子的碱基序列。对9例接受手术治疗的病人进行长期随访,结果：9例慢性胰腺炎中4例有明显的胰导管上皮粘液细胞增生,其中2例被检出GAT型突变,分别占全组和有胰管上皮粘液细胞增生的22％和505,两个突变病例分别是接受了胰体尾切除和胰头十二指肠切除手术,术后分别随访17年和10年,没有发现任何恶变迹象,结构：慢性胰腺为可以检出K－ras基因突变,发生了K－ras基因突变的慢性胰腺炎上皮粘液细胞增生灶,未必一定发生为胰腺癌,胰液、粪便、末梢血液和尿液的检测,以及胰腺组织细针刺液检出K－ras基因突变,对胰腺癌的诊断有重要参考价值,但不应视为胰腺癌的确诊依据。     

The prognostic value of platelet-to-lymphocyte ratio on the long-term renal survival in patients with IgA nephropathy

Purpose

Platelet-to-lymphocyte ratio (PLR) was established showing the poor prognosis in several diseases, such as malignancies and cardiovascular diseases. But limited study has been conducted about the prognostic value of PLR on the long-term renal survival of patients with Immunoglobulin A nephropathy (IgAN).

Methods

We performed an observational cohort study enrolling patients with biopsy-proven IgAN recorded from November 2011 to March 2016. The definition of composite endpoint was eGFR decrease by 50%, eGFR?<?15 mL/min/1.73 m², initiation of dialysis, or renal transplantation. Patients were categorized by the magnitude of PLR tertiles into three groups. The Kaplan–Meier curves and multivariate Cox models were performed to determine the association of PLR with the renal survival of IgAN patients.

Results

330 patients with a median age of 34.0 years were followed for a median of 47.4 months, and 27 patients (8.2%) had reached the composite endpoints. There were no differences among the three groups (PLR?<?106, 106?≤?PLR?≤?137, and PLR?>?137) in demographic characteristics, mean arterial pressure (MAP), proteinuria, and estimated glomerular filtration rate (eGFR) at baseline. The Kaplan–Meier curves showed that the PLR?>?137 group was significantly more likely to poor renal outcomes than the other two groups. Using univariate and multivariate cox regression analyses, we found that PLR?>?137 was an independent prognostic factor for poor renal survival in patients with IgAN. Subgroup analysis revealed that the PLR remained the prognostic value for female patients or patients with eGFR less than 60 mL/min/1.73 m².

Conclusions

Our results underscored that baseline PLR was an independent prognostic factor for poor renal survival in patients with IgAN, especially for female patients or those patients with baseline eGFR less than 60 mL/min/1.73 m².

     

Serum folic acid levels and erectile dysfunction: A meta-analysis and systematic review

The aim of this study was to assess the relationship between serum folic acid (FA) levels and erectile dysfunction (ED) through a meta-analysis. A research was conducted in MEDLINE via PubMed, Cochrane Library, EMBASE and Web of Science up to 22 November 2020 to identify studies related to FA and ED. Two authors independently screened the literature, evaluated methodological quality and extracted the data. We used RevMan5.3 and STATA 14.0 for meta-analysis. A total of six studies including 1,842 participants were included, and the results showed that the FA levels in the non-ED group were significantly higher than those in the ED group (MD = 3.37, 95% CI 1.49–5.52, p = 0.004). Subgroup analysis indicated that with the increase in ED severity, the difference in FA levels between groups was more obvious (MD: 1.99 vs. 4.63 vs. 5.63). The differences in FA levels between groups seem more significant in the younger group (MD = 4.87, 95% CI 2.58–6.89, p < 0.001) than in the older group (MD = 3.15, 95% CI 2.21–4.08, p < 0.001). In conclusion, FA deficiency is closely related to ED, and the degree of FA deficiency may reflect the severity of ED. In addition, the association seems to be more pronounced in the younger group.     

Safety and efficacy of thulium laser resection of bladder tumors versus transurethral resection of bladder tumors: a systematic review and meta-analysis

Lasers in Medical Science - The thulium laser resection of bladder tumor (TmLRBT) is widely used in the treatment of non-muscle-invasive bladder cancer (NMIBC), and we conduct this study to compare...     

微小RNA-362在脑星形细胞瘤中的表达

目的研究微小RNA(microRNA,miR)-362在不同级别星形细胞瘤中的表达,探讨其临床意义及价值。方法使用定量聚合酶链反应(PCR)方法比较长治医学院附属和平医院32例星形细胞瘤患者和4例正常脑组织中miR-362的表达。多组间比较采用单因素方差分析,两组间比较使用配对t检验。结果所有星形细胞瘤组织miR-362表达(0.194±0.052)明显低于正常脑组织miR-362表达(0.436±0.044,t=8.887,P<0.05),差异有统计学意义,其中低级别星形细胞瘤组织miR-362表达(0.172±0.045)和高级别星形细胞瘤(0.202±0.070)均明显低于正常脑组织miR-362表达(t=10.101,t=6.386,P<0.05),差异有统计学意义,但低级别星形细胞瘤组织miR-362表达与高级别星形细胞瘤miR-362表达之间差异无统计学意义(t=1.284,P>0.05)。结论miR-362在星形细胞瘤组织中表达下调,但在低级别与高级别星形细胞瘤间无差异。     

关节镜辅助复位内固定与切开复位内固定治疗胫骨平台骨折的疗效比较

目的比较关节镜辅助复位内固定(ARIF)和切开复位内固定(ORIF)治疗胫骨平台骨折的疗效。方法回顾性分析2016年1月至2018年8月华中科技大学附属协和医院骨科收治的75例胫骨平台骨折患者的资料。男58例,女17例;年龄20~54岁,平均47岁。左侧42例,右侧33例。骨折根据Schatzker分型:Ⅰ型23例,Ⅱ型49例,Ⅲ型3例。患者按治疗方案不同分为2组:ARIF组(采用ARIF治疗40例),ORIF组(采用ORIF治疗35例)。记录并比较两组患者的手术时间、切口长度、术中出血量、住院时间、术后并发症情况及术后12个月美国特种外科医院(HSS)膝关节功能评分。结果ARIF组和ORIF组患者的术前一般资料比较差异均无统计学意义(P>0.05),具有可比性。所有患者术后获12~15个月(平均13.5个月)随访。75例患者伤口均一期愈合,无神经、血管损伤等相关并发症。术后6个月所有患者骨折均获愈合。ARIF组的手术时间[(58.3±4.2)min]较ORIF组[(48.4±5.2)min]长,ARIF组的切口长度[(4.3±0.9)cm]较ORIF组[(6.2±0.8)cm]短,ARIF组术中失血量[(60.8±4.5)mL]较ORIF组[(72.8±6.5)mL]少,差异均有统计学意义(P<0.05)。ARIF组和ORIF组住院时间分别为(5.1±0.6)、(5.5±1.6)d,差异无统计学意义(P>0.05)。ARIF组和ORIF组分别有15例和5例患者合并软组织损伤,差异有统计学意义(P<0.05)。术后12个月ARIF组和ORIF组患者的HSS评分优良率分别为100%(40/40)和85%(34/40),差异无统计学意义(P>0.05)。结论ARIF和ORIF治疗SchatzkerⅠ~Ⅲ型胫骨平台骨折均可以获得良好疗效;但ARIF可以更准确地评估和治疗胫骨平台骨折合并的膝关节软组织损伤,具有手术时间短、切口小、出血少的特点。     

剪切波弹性成像与FNA-Tg对甲状腺乳头状癌侧颈部淋巴结转移的诊断价值

目的：探讨剪切波弹性成像(shear wave elastography,SWE)与细针穿刺洗脱液甲状腺球蛋白(fine-needle aspiration washout thyroglobulin,FNA-Tg)对甲状腺乳头状癌侧颈部淋巴结转移的诊断价值。方法：回顾性分析159例经病理证实为甲状腺乳头状癌(papillary thyroid carcinoma,PTC)的患者资料,对颈部211枚可疑淋巴结进行常规超声、SWE参数平均值(E_mean)、FNA-Tg检查,以术后病理结果为金标准,比较各检测方法的诊断效能。结果：(1)SWE E_mean转移组[(50.96±27.66) kPa]高于非转移组[(32.20±17.34) kPa],差异有统计学意义(t=8.761,P<0.01)。受试者工作特征(receiver operating characteristic,ROC)曲线分析表明,SWE E_mean最佳诊断阈值为40.42 kPa时对PTC颈部淋巴结转移预测价值较高,曲线下面积(area under...