女性系统性红斑狼疮患者骨代谢异常的危险因素分析

目的 探讨骨代谢、骨密度与外周血淋巴细胞亚群的关系,初步探索免疫细胞在系统性红斑狼疮(systemic lupus erythematosus, SLE)骨代谢异常中的作用。方法 采用双能X线吸收法(dual energy X-ray absorptiometry, DEXA)检测SLE患者的骨密度,同日检测患者的外周血淋巴细胞亚群分布。结果 共纳入92名SLE女性患者,患者的平均年龄及病程分别为(42.1±14.1)岁、(84.4±73.0)个月。有62.0%(n=57)患者存在骨代谢异常,其中44.6%(n=41)患者为骨量减少,17.4%(n=16)患者并发骨质疏松症,后者还包括9.8%(n=9)发生脆性骨折的患者。全身骨密度最低值与年龄(r=-0.291,P=0.005)、病程(r=-0.239,P=0.022)、绝经状态(r=-0.288,P=0.005)及碱性磷酸酶(r=-0.221,P=0.033)均呈负相关。Logistics分析显示绝经状态(OR=13.0,P<0.001,95%CI 3.43～49.5)、LDL-C(OR=5.74,P=0.002,95%CI ...     

武汉地区FES患者骨质疏松状况及危险因素分析

目的 研究分析武汉地区首发精神分裂症(first-episode schizophrenia, FES)患者患骨质疏松症(osteoporosis, OP)状况及危险因素。方法 将2020年1月至2021年6月于武汉地区精神科专科联盟机构就诊的450例FES患者纳入观察组;另选择同期健康体检的443例正常人作为对照组。统计观察组患者OP发生情况,比较观察组与对照组骨密度测量结果和骨代谢指标水平,分析影响FES患者OP发生的危险因素。结果 观察组骨量正常比例低于对照组,骨量减少及OP比例高于对照组(P<0.05);骨代谢指标水平低于对照组(P<0.05);血糖指标水平高于对照组(P<0.05),两组血脂指标比较差异无统计学意义(P>0.05);单因素分析结果显示性别、年龄、精神分裂症病程、体质量指数(body mass index, BMI)、吸烟史、日均运动时长、合并糖尿病、高血脂、冠心病均与首发精神分裂症患者OP的发生相关(P<0.05);多因素Logistic回归分析结果显示女性、年龄≥60岁、精神分裂症病程≥2年、BMI≥24 kg/m^2<...     

假体周围骨折与骨质疏松

骨质疏松与假体周围骨折的发生密切相关。骨质疏松状态下假体周围骨折的预防需从改善局部骨量和预防跌倒入手。检测关节假体周围的骨密度可用于评估假体周围骨折的风险。在对骨质疏松状态下假体周围骨折进行手术治疗时,可使用骨移植替代材料来增加骨折部位固定的强度,也可使用改进型的内固定材料或翻修假体来提高手术的成功率。     

VEGF、VEGFR-2和MVD在肾上腺皮质癌中的表达及意义

目的探讨VEGFR-2、VEGF和MVD在肾上腺皮质癌(ACC)中的表达及其临床意义。方法选取经手术治疗且具有完整的临床、病理资料的肾上腺皮质肿瘤存档石蜡标本37例,其中良性组20例,恶性组(ACC组)17例。采用免疫组化技术,检测良、恶性肾上腺皮质肿瘤中VEGFR-2、VEGF和MVD的表达情况。结果 VEGFR-2在ACC组中呈高表达(76.47%),在良性组中表达较低(25.00%),ACC组与良性组之间VEGFR-2的表达有显著性差异(P0.05)。VEGF在ACC组中呈高表达(70.59%),在良性组中表达较低(25.00%),VEGF在ACC组中的表达与在良性组中的表达有显著性差异(P0.05)。MVD在ACC组中的表达为(76.40±15.64),良性组中为(21.05±8.07),两者之间有显著性差异(P0.05)。结论 VEGFR-2和VEGF以及MVD在ACC中的高表达为抗肿瘤血管生成治疗在ACC中的应用,提供了一定的理论依据。     

Production of Dense Cu-10Sn Part by Laser Powder Bed Fusion with Low Surface Roughness and High Dimensional Accuracy

Tin-bronze alloys with a tin content of at least 10 wt% have excellent mechanical properties, wear resistance, and corrosion resistance. Among these alloys, Cu-10Sn was investigated in this study for production with the laser powder bed fusion process with a 500W Yb:YAG laser. In particular, a design of experiment (DoE) was developed in order to identify the optimal process parameters to obtain full density, low surface roughness, and high dimensional accuracy. Samples were characterized with Archimedes’ method and optical microscopy to determine their final density. It was shown that the first method is fast but not as reliable as the second one. A first mechanical characterization was performed through microhardness tests. Finally, a set of process parameters was identified to produce fully dense samples with low surface roughness and high accuracy. The results showed that the volumetric energy density could represent an approach that is too simplified, therefore limiting the direct correlation with the physical aspects of the process.     

生长相关性癌基因-1在喉癌中的表达及其与CD34的相关性研究

目的探讨生长相关性癌基因-1（GRO-1）在喉癌组织中的表达及其与喉癌部分临床生物学特性的相关性。方法采用免疫组织化学染色方法检测48例喉癌组织中GRO-1和CD34的表达。结果免疫组织化学染色结果显示,GRO-1表达和CD34的表达与喉癌分期（早期与进展期）及淋巴结转移相关,染色度随喉鳞状细胞癌分期增高而增高并且有淋巴结转移的癌组织GRO-1染色度和CD34的表达,明显高于无淋巴结转移的喉癌组织（P〈0.01）;GRO-1表达和CD34的表达与喉癌分化程度无关（P〉0.05）;GRO-1与CD34在不同年龄和性别的表达均无统计学意义（均P〉0.05）。GRO-1和CD34的表达存在显著的正相关关系（r=0.722,P〈0.01）。结论GRO-1能够通过多种作用影响喉癌的发生、发展和转移,其中在微血管形成方面GRO-1的高表达可能在喉癌的发生发展中起重要作用。     

Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution

Adherent hardened cement paste attached to recycled concrete aggregates (RCA) generally presents a higher porosity than natural aggregates, which induces a lower porosity in the properties of RCA. The characterization of the adherent hardened cement paste content (HCPC) in the fine RCA would promote better applications of RCA in concrete, but the determination of HCPC in fine RCA is not well established. A simple method based on salicylic acid dissolution was specifically developed to quantify the HCPC in RCA, especially for RCA containing limestone aggregates. The results demonstrated that the soluble fraction in salicylic acid (SFSA) was equal to the HCPC for white cement and slightly lower for grey Portland cement, which was also confirmed by a theoretical approach using modelling the hydration of cement paste with the chemical equations and the stoichiometric ratios. The physical and mechanical properties of RCA (e.g., water absorption) were strongly correlated to the SFSA. For industrial RCA, SFSA did not give the exact value of HCPC, but it was sufficient to correlate HCPC with the other properties of RCA. The water absorption could be estimated with good accuracy for very fine RCA (laboratory-manufactured RCA or industrial RCA) by extrapolating the relationship between water absorption and HCPC, which is very important for concrete formulation.     

应用循证医学探讨福利院中老年骨折的特点

目的：应用循证医学探讨福利院中老年骨折的特点（原因、好发部位、骨折时骨骼的状态）。方法：在循证医学指导下对福利院369名老年人中3年间发生骨折的病人进行X线摄片和骨密度、骨生化代谢指标测定。结果：369人中有73人骨折，其中50人患中度以上骨质疏松症；骨生化测定仅骨钙素与骨密度呈正相关；骨折常见于髋、腕和脊柱等部位。结论：骨质疏松为老年骨折的主要原因，骨密度下降提示骨折的可能性增高；髋、腕和脊柱是老年骨折好发部位。     

间质微血管密度与乳腺癌临床病理因素的关系

目的:探讨乳腺癌微血管密度(MVD)与临床病理因素的关系.方法:应用免疫组织化学S-P法,对49例乳腺癌和10例癌旁正常组织MVD进行检测,并将其结果与影响预后的临床病理因素进行比较.结果:乳腺癌MVD明显高于癌旁正常组织(P＜0.01);乳腺癌MVD与组织学分级、淋巴结转移呈正相关(P＜0.05),与患者年龄、肿瘤大小、组织学分型、临床分期、雌孕激素受体水平无关.结论:乳腺癌MVD可作为判定肿瘤生物学行为、转移潜能、预后和指导临床治疗的参考指标.     

体重体成分与骨密度的关系

为了研究体成分与骨密度（ＢＭＤ）之间的关系，因体重与ＢＭＤ显著相关，体成分各个组成相加等于体重，而体成分与ＢＭＤ的关系仍不清楚。方法随机选取２０６名１６～５２岁健康的男女性汉族人，用双能Ｘ射线吸收法（ＤＸＡ）测量ＢＭＤ与体成分，进行ＢＭＤ与体重，体成分的多元线性回归分析。结果体重，瘦组织（ＬＴＭ）与男女性的ＢＭＤ显著正相关，脂肪组织（ＦＴＭ）仅对女性全身，腰椎ＢＭＤ起显著性作用。结论影响男女性ＢＭＤ的体成分中，ＬＴＭ是主要因素，ＦＴＭ仅对女性ＢＭＤ有影响。本文较全面地研究了体成分与ＢＭＤ的关系。