An antibody against Siglec-15 promotes bone formation and fracture healing by increasing TRAP+mononuclear cells and PDGF-BB secretion

INTRODUCTION Siglec-15 is a member of the sialic acid-binding immunoglobulintype lectin (Siglecs) family, a group of cell-surface receptors that potentially reg...     

开窗腰椎间盘切除再手术的远期疗效

目的探讨开窗腰椎间盘切除再手术治疗初次开窗髓核摘除术失败患者的远期疗效和影响因素。方法回顾性研究51例行第二次开窗腰椎间盘切除术的患者临床资料,随访时间120~203个月,平均随访146.8个月。按MacNab分类和JOA评分标准评价满意度和远期功能。对放射学资料完整的患者进行手术前后椎间隙高度对比研究。结果51例患者中,结果优良率70.6%,失败率15.7%,患者总体满意率78.4%。除了8例失败患者,远期随访的43例患者JOA评分平均提高(64.6±18.2)%,术后行走能力明显改善。对手术节段椎间隙高度测量发现术后椎间隙高度明显下降,但不影响远期功能结果。吸烟、是否有外伤等发病诱因、合并纤维化和初次术后症状未缓解期对远期结果有影响。心理社会因素与预后可能存在一定关系。结论开窗腰椎间盘切除再手术治疗初次开窗髓核摘除术失败患者疗效满意,但手术复杂性高,明确术前诊断和严格手术指征非常重要。JOA评分被证明为易于患者和医师实施,量化主观数据的评估法。     

Endoscopic features of esophageal high-grade intraepithelial neoplasia dominated by cytological atypia

Little is known about esophageal high-grade intraepithelial neoplasia dominated by cytological atypia (HGINc). We aimed to elucidate the endoscopic features of HGINc compared with esophageal high-grade intraepithelial neoplasia dominated by architectural atypia (HGINa). All patients pathologically diagnosed as esophageal high-grade intraepithelial neoplasia after endoscopic submucosal dissection at our center between January 2018 and December 2019 were included in this study. According to the pathological diagnosis, the patients were divided into two groups: HGINa group and HGINc group. Basic characteristics and endoscopic information were collected in detail. Data were analyzed statistically. Binary logistic regression was performed and a predictive model for HGINc was established. Then we evaluated its predictive value and built a nomogram for clinical application. A total of 175 patients were included in this study (126 with HGINa and 49 with HGINc). Among 228 lesions found in all patients, there were 148 HGINa and 80 HGINc. The independent relevant factors for HGINc were tobacco and alcohol usage, color, and gross type. To predict risk of HGINc, a three-factor model (TFM) was established with a highest area under curve (AUC) as 0.869 (95% CI, 0.852, 0.939). When the cut-off value was set as 0.3569184, the diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for HGINc was 81.14%, 88.75%, 77.03%, 67.62%, and 92.68%, respectively. HGINc differs greatly in endoscopic features from HGINa in our study. It’s important to reduce misdiagnosis that our model was established with good predictive value for clinical application.     

The impact of spleen volume on the survival of metastatic pancreatic adenocarcinoma patients receiving nanoliposomal irinotecan

Nanoliposomal irinotecan (nal-IRI) plus 5-fluorouracil and leucovorin (NalFL) comprises the current standard for gemcitabine-failed metastatic pancreatic ductal adenocarcinoma (PDAC). As liposomes generally accumulate in the spleen, we evaluated the impact of spleen volume on prognosis. We enrolled patients with metastatic PDAC who failed gemcitabine-based therapy and were initiated on NalFL between August 2018 and November 2020. The spleen volume before NalFL administration was evaluated. They were stratified into dose subgroups (i.e. low, < 48 mg/m²; intermediate, 48 - < 64 mg/m²; high, ≥ 64 mg/m²) by the average nal-IRI dose during the entire treatment, and multivariate analysis of overall survival (OS) was performed. We included 547 patients with a median age of 63 years (range, 27-89 years) and a median of 1 (range, 0-7) palliative chemotherapy regimen. The median spleen volume was 245 mL (range, 82-817 mL). Among patients with splenomegaly (≥ 245 mL), the low-dose subgroup had the worst median time to treatment failure (TTF, 1.8 months vs. 2.5 months vs. 2.5 months, P = 0.020) and OS (3.3 months vs. 5.9 months vs. 6.6 months, P = 0.018) as against no prognostic impact in patients without splenomegaly. In the multivariate analysis of patients with splenomegaly, performance status (PS) ≥ 2, body surface area (BSA) < 1.6 m², prior fluoropyrimidine use, liver metastasis, and low-dose subgroup were independent poor prognostic factors. A low average nal-IRI dose was significantly associated with poor prognosis, especially among patients with splenomegaly. Further pharmacological studies should validate the relevance of spleen volume on the treatment outcomes of nal-IRI.     

Cancer stem-like cells contribute to paclitaxel resistance in esophageal squamous cell carcinoma

Objective: To examine the role of esophageal squamous cell carcinoma (ESCC) stem cells in paclitaxel resistance through the molecular characterization of ESCC stem cells. Methods: A resistant cell line (RR-ECl09) of cells were established using intermittent induction and time increments of high-dose paclitaxel in a human esophageal squamous cell carcinoma line (EC109). The multidrug resistance of RR-ECl09 cells to anticancer agents was evaluated by MTT assay. The RR-EC109 and EC109 cells were used for sphere formation assays, clonogenicity assays, stem cell gene expression, and the expression of epithelial-mesenchymal transition markers. Results: The RR-EC109 cells were established over 7 months. RR-ECl09 cells had 67.258 fold resistance to paclitaxel. The percentage of sphere formation and clone proliferation ability of RR-EC109 cells was higher than that of EC109 cells (P < 0.05). The amount of side population cells in RR-EC109 cells was higher than that of EC109 cells (P < 0.05). RR-EC109 cells produced more mRNA for Bmi1, Nanog, Oct4, Sox2, ABCG2, Nestin, and Ki-67 than EC109 cells (P < 0.05). E-cadherin expression was lower in RR-EC109 cells than in EC109 cells, while N-cadherin, Snail, and Twist expressions were higher in RR-EC109 cells than in EC109 cells (P < 0.05). Conclusions: Cancer stem cell (CSC)-like cells exist among paclitaxel-resistant cells in ESCC and may play a role in ESCC drug resistance.     

2004年三种医学期刊论著中统计方法的应用状况与分析

目的比较三种不同系列医学期刊统计方法的应用状况。方法采用单纯随机抽样法,对确定的2004年度公开发表的三种(中华、中国和军队系列)医学期刊中的全部论著进行调查分析。结果在三种系列期刊中,统计方法应用比均达90%以上(χ2=1.71,P>0.05),误用比分别为7.44%、13.39%和21.57%(χ2=9.35,P<0.01)。多因素分析应用比分别为14.05%、8.04%和2.94%(χ2=8.72,P<0.05)。计量资料和计数资料应用比无差异(χ2=3.45,P>0.05)。统计方法分类应用和误用百分比排序及统计问题分类误用百分比排序前10位存在不一致。结论医学期刊论著中统计方法应用普遍,但出现的统计问题或瑕疵也较多。     

Intactness of membranous structure in canine stunned myocardium shown with colloidal lanthanum nitrate

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新型合作医疗定点医疗机构评价体系初探

文章从更好地满足农民医疗需求、有助于提高医疗机构质量和进行有效监管3个方面阐述了建立定点医疗机构评价体系的必要性，然后对评价体系的内容进行了初步的探讨，提出了医疗机构定点的2种模式、评价的主要内容和评价体系的运作的方式，为建立新型合作医疗定点医疗机构评价体系、促进新型合作医疗的可持续发展提供了一种思路。     

防晕帽各组成部分对前庭自主神经反应作用的分析

目的分析防晕帽各组成部分对前庭自主神经反应的作用。方法将90名年轻健康飞行人员随机分为三组：A组为对照组，戴空白帽，将防晕帽中磁片、风扇及负离子发生器去掉者；B组为戴去掉风扇及负离子发生器帽子组；C组为戴防晕帽组。三组均在戴帽15min后进行科里奥利加速度试验，受试者出现I。前庭自主神经反应时停止转椅并观察20min，依照前庭自主神经反应程度进行分度，对受试时间和前庭自主神经反应程度进行比较。结果三组科里奥利加速度试验持续时间分别为（349．43±31．60）s、（366．23±32．62）s、（385．17±35．54）s，差异均有统计学意义（P〈0．05），前庭自主神经反应程度发生率差异亦有统计学意义（P〈0．05）。结论防晕帽中穴位磁片、风扇和负离子发生器的综合作用可有效降低前庭自主神经的反应程度，为运动病的防控提供了新的思路和措施。