核形态测量对判断小肝癌预后和复发的意义

作者应用ＭＩＰＳ－１型自动图像分析仪，检测２５例小肝癌细胞核形态学参数及ＤＮＡ含量。结果发现，随着小肝癌细胞分化程度的减低（Ｅｄｍｏｎｄｓｏｎ分级Ⅰ～Ⅲ级），肿瘤细胞核面积、最大直径、积分光密度呈增高趋势，术后复发率逐渐增高（０％、３８．９％、８０％）。复发组肝癌细胞核周长、核最大直径、核积分光密度及ＤＮＡ指数均明显高于未复发组，分别为２５．８４±２．０７比２４．０５±２．７８，８．３８±０．８７比７．７３±０．８１，７．９７±１．８１比５．６５±２．０１，３．０６±１．１１比２．０１±０．５２（Ｐ＜０．０５～０．００５）。结果表明，细胞核增大程度是反映肝癌细胞分化度与恶性度的有效指标。Ｅｄｍｏｎｄｓｏｎ分级对判定肝癌细胞分化程度及预后具有临床实际意义，但核形态参数与ＤＮＡ指数比较，后者在判定分化程度及复发、预后方面更具明显优势。     

精索内静脉结扎加腹壁下静脉转流治疗精索静脉曲张

在手术显微镜下,采用精索内静脉结扎加腹壁下静脉转流治疗精索静脉曲张13例。测定手术前后精零静脉及腹壁下静脉压力,平均为1.42kPa、0.76kPa 和0.53kPa,有极显著差异(P 均小于0.01)。     

Flexor tendon healing in the rat: a histologic and gene expression study

PURPOSE: To establish a rat flexor tendon laceration and repair model to investigate the molecular mechanisms of flexor tendon healing. METHODS: Surgery was performed on rat flexor digitorum longus tendons from both hind feet. Repaired tendons were harvested at 0, 3, 7, 14, 21, 28, 42, 56, and 84 days after surgery. Histologic study (first 84 days) and gene expression study (first 28 days) of several collagens and matrix metalloproteinases (MMPs) were performed. RESULTS: In the histologic study pre-existing collagen bundles were degraded between days 7 to 21. Newly formed collagen fibers crossed the repair site by day 28. Remodeling of the collagen fibers continued until day 84. Gene expression of type I collagen decreased initially and then returned gradually to the initial level by day 28, whereas expression levels of types III, V, and XII collagen were increased after surgery. The expression levels of MMP-9 and MMP-13 peaked between days 7 to 14, whereas MMP-2, MMP-3, and MMP-14 levels increased after surgery and maintained high levels until day 28. CONCLUSIONS: The rat tendon laceration model represented the entire tendon healing process. The results of this study suggest that MMP-9 and MMP-13 participate only in collagen degradation, whereas MMP-2, MMP-3, and MMP-14 participate not only in collagen degradation but also in collagen remodeling.     

偏头痛患者发作间歇期血6－keto－PGF_（1α）和TXB_2含量的观察

通过对２３例发作间歇期偏头痛患者及２０名年龄、性别匹配的正常对照组血６－ｋｅｔｏ－ＰＧＦ１α（６－酮前列腺素Ｆ１α）和ＴＸＢ２（血栓素Ｂ２）含量的测定，发现偏头痛患者的６－ｋｅｔｏ－ＰＧＦ１α含量较对照组低（Ｐ＜０．０１），ＴＸＢ２含量则两者无差异。作者认为低水平的６－ｋｅｔｏ－ＰＧＦ１α是偏头痛的发作及复发的重要物质基础之一，而ＴＸＢ２则意义不大。     

ARCHITECT C16000全自动生化分析仪检测血清胱抑素C的性能评价

目的 对ARCHITECT C16000全自动生化分析仪检测血清胱抑素C(Cys C)的分析性能进行评价.方法 根据相关标准,验证ARCHITECT C16000全自动生化分析仪检测血清Cys C的精密度、正确度、分析测量范围、临床可报告范围、抗干扰性能、生物参考区间.结果 低水平质控品、高水平质控品及混合血清标本的批...     

Protein Z-dependent protease inhibitor deficiency produces a more severe murine phenotype than protein Z deficiency

Protein Z (PZ) is a plasma vitamin K–dependent protein that functions as a cofactor to dramatically enhance the inhibition of coagulation factor Xa by the serpin, protein Z–dependent protease inhibitor (ZPI). In vitro, ZPI not only inhibits factor Xa in a calcium ion–, phospholipid-, and PZ-dependent fashion, but also directly inhibits coagulation factor XIa. In murine gene-deletion models, PZ and ZPI deficiency enhances thrombosis following arterial injury and increases mortality from pulmonary thromboembolism following collagen/epinephrine infusion. On a factor V_Leiden genetic background, ZPI deficiency produces a significantly more severe phenotype than PZ deficiency, implying that factor XIa inhibition by ZPI is physiologically relevant. The studies in mice suggest that human PZ and ZPI deficiency would be associated with a modest thrombotic risk with ZPI deficiency producing a more severe phenotype.      

某汽车制造企业技改项目职业病危害控制效果评价

目的对某汽车制造企业技改项目存在的职业病危害因素进行检测和评价。方法依据《建设项目职业病危害评价规范》,采用职业卫生现场调查、职业卫生检测、职业健康检查、经验对照、系统工程分析等方法,对作业场所存在的职业病危害因素进行检测与评价。结果该项目主要职业病危害因素为粉尘、噪声、高温、化学毒物。粉尘检测点合格率100.0%,粉尘单项指数为0.224 6;噪声检测点合格率为97.4%,噪声单项指数为0.904 9;化学毒物检测点合格率100.0%,单项指数范围为0.001 2～0.275 2。结论该项目为职业病危害严重的建设项目,职业病危害因素控制已达到预期评价效果,基本符合《工业企业设计卫生标准》GBZ 1-2010的要求。技改项目的机械化与自动化程度较高、通风排毒设施齐全、职业卫生管理制度执行有力。这对控制职业病危害至关重要。