非胰岛素依赖型糖尿病患者肺功能检查的初步探讨

对２５例非胰岛素依赖型糖尿病（ＮＩＤＤＭ）患者及２４例正常人进行全套肺功能检查，并作对比分析，结果表明：ＮＩＤＤＭ组比正常对照组Ｖ２５／ＨＴ减低。差异有高度显著性（Ｐ＜０．０１）；ＤＬＣＯ减低差异有显著性（Ｐ＜０．０５），并认为ＮＩＤＤＭ患者小气道功能、弥散功能减低与糖代谢紊乱，致机体抵抗力降低、免疫功能下降，并与肺胞毛细血管基底膜增厚有关。检查ＮＩＤＤＭ患者小气道功能和肺泡弥散功能，具有一定临床意义。     

Circulating levels of placental protein 12 and chorionic gonadotrophin following RU 38486 and Gemeprost for termination of first trimester pregnancy

First trimester termination of pregnancy was successfully inducedin ten patients with RU 38486 followed 2 days later by a prostaglandin(Gemeprost) pessary. Human chorionic gonadotrophin (HCG) valuesremained unaltered until after the abortion. The levels of placentalprotein 12 (PP12) showed an immediate and significant fall followingRU 38486, then rose to values substantially higher than thoseat the initial visit after 2 days. These findings show thatRU 38486 has a direct inhibitory effect on tissues producingPP12 and confirm the progesterone dependency of this protein     

Protein phosphatase PP1 is required for normal DNA methylation in Neurospora

Covalent modifications of histones integrate intracellular and extracellular cues to regulate the genome. H3 Lys 9 methylation (H3K9me) can direct heterochromatin formation and DNA methylation, while phosphorylation of H3 Ser 10 (H3S10p) drives gene activation and chromosome condensation. To examine the relationship between H3S10p, H3K9me, and DNA methylation in Neurospora crassa, we built and tested mutants of the putative H3S10 phosphatase, PP1. A PP1-impaired mutant showed increased H3S10p and selective reduction of methylation of H3K9 and DNA. Similarly, amino acid substitutions of H3S10 abolished methylation of H3K9 and DNA. Thus, H3S10 dephosphorylation by PP1 is required for DNA methylation of some loci.     

Ability of rosetting or non-rosetting individual control and inflammatory macrophages to kill Escherichia coli X43 intracellularly

An autoradiographic method combined with a rosette technique was used to assess the bactericidal activity of individual control and inflammatory peritoneal macrophages (PM phi) in the presence or absence of expression of Fc receptor for IgG (FcR). There was a lack of FcR reactivity in a certain percentage of both categories of PM phi exposed to E. coli X43, a bacterium which is readily phagocytosed in the presence of specific antibody. Both rosetting and non-rosetting PM phi were capable of phagocytosing E. coli X43, but inflammatory PM phi showed a marked reduction in their capacity to ingest these bacteria compared with control PM phi. Once ingested the E. coli X43 were killed equally well by non-rosetting and rosetting control and inflammatory PM phi.     

Low‐Temperature Polymerization of Olefins in the Presence of Titanium Monoamidinate/MAO Catalyst

This paper reports the predominantly syndiotactic‐specific polymerization of propylene in the presence of titanium monoamidinate/methylaluminoxane (MAO) catalysts. The same catalysts, depending on the reaction conditions, also promote either predominantly 1,4‐cis or 1,4‐trans polymerization of 1,3‐butadiene and polymerization of styrene either to highly syndiotactic or to stereoirregular polymer. Some preliminary information about the features of propylene polyinsertion is also reported.

Expansion of the 20–24 ppm region of the ¹³C NMR spectrum of sample 2. The starred resonance at 21.75 ppm and the shoulders are not assigned.     

动态硫化EPDM／PP共混体系中PP相的结晶度及晶体结构的研究

研究了动态硫化ＥＰＤＭ／ＰＰ共混物中ＰＰ相的结晶度及晶体结构,同时讨论了制备工艺条件以共混物中ＰＰ相的结晶度和晶体结构的影响。结果表明：在动态硫化ＥＰＤＭ／ＰＰ共混物中,硫化的ＥＰＤＭ的分子键没有穿入ＰＰ的晶区,ＰＰ的结晶度随ＥＰＤＭ含量的增加而下降。提高共混温度,加入软化剂或碳黑均使共混物中ＰＰ的结晶度降低,共混时间１５ｍｉｎ时,共混物中ＰＰ相的结晶度最低,但ＰＰ的晶格不受制备工艺条件的影响。     

Inhibition of embryonic development by microcystin-LR in zebrafish, Danio rerio.

Microcystin-LR (MC-LR), a cyanobacterial toxin, is a potent inhibitor of protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A). PP1 and PP2A are critical regulators in embryonic development. However, the effects of MC-LR in embryonic development have been controversial. MC-LR has been demonstrated to be highly toxic in medaka, but not in zebrafish or rabbit embryos. The causes of difference may be due to membrane impermeability that impaired the delivery of MC-LR into cytoplasm of zebrafish and rabbit embryos. Therefore, we microinjected MC-LR directly into developing zebrafish embryos and investigated the effects of MC-LR on embryonic development. We demonstrated that MC-LR induced the lethality of zebrafish embryos in a dose- and time-dependent manner. MC-LR also induced the loss of blastomere coherence via the interference of beta-catenin and cadherins distributions. Furthermore, the MC-LR treated fry revealed various developmental defects. These results suggested that MC-LR might affect the phosphorylation equilibrium of signaling molecules, including beta-catenin and cadherins, required early in zebrafish embryonic development.     

剖宫产术中放置吉娜IUD后产褥出血量及恶露持续时间的观察

目的:观察剖宫产术中放置吉娜固定式宫内节育器(GyneFix PP IUD)对产时、产后出血、恶露持续时间及子宫复旧的影响。方法:对200例剖宫产放置吉娜IUD和204例剖宫产未放IUD妇女产时、产后出血量,产后恶露持续时间进行比较,并B超复查产后42天、90天时子宫复旧情况及吉娜IUD的状况。结果:两组产后出血量、恶露持续时间无显著差异,子宫复旧正常。在产后42天复查时吉娜脱落率为4％。86％的妇女可在宫颈见到吉娜尾丝。结论:剖宫产术即时放置吉娜IUD是安全的,未增加产后出血量及恶露持续时间,不影响子宫复旧,为产后即时避孕提供了新的选择。     

补锌糖尿病大鼠肝脏糖脂代谢相关基因表达

目的探讨补锌对糖尿病大鼠肝脏糖脂代谢相关基因蛋白磷酸酶2A(PP2A)和磷脂酶D(PLD)表达的调控。方法对补锌糖尿病大鼠差异显示的基因片段进行克隆、测序及同源性分析;设计基因序列引物,RT-PCR检测观察各组大鼠肝脏中基因表达的变化。结果结果显示,片段Zn-4、Zn-8的碱基序列分别与PLD、PP2A同源性为100%,99%。糖尿病对照组PP2A mRNA表达量(0.5072±0.0574)低于正常对照组(1.3303±0.1855),P<0.05;糖尿病补锌组PP2A mRNA的表达量(0.7005±0.1563)与糖尿病对照组比较有所恢复(P<0.05)。糖尿病对照组PLD mRNA表达量(1.0754±0.0312)和糖尿病补锌组PLD mRNA的表达量(1.0130±0.0992)均高于正常对照组(0.7995±0.1040),P<0.05;糖尿病补锌组PLD mRNA的表达量与糖尿病对照组比较无变化(P>0.05)。结论补锌对糖尿病大鼠肝脏PP2A mRNA表达有上调作用,这可能是锌改善糖尿病糖、脂代谢紊乱的分子机制之一。     

Preclinical refinements of a broadly protective VLP-based HPV vaccine targeting the minor capsid protein,L2

An ideal prophylactic human papillomavirus (HPV) vaccine would provide broadly protective and long-lasting immune responses against all high-risk HPV types, would be effective after a single dose, and would be formulated in such a manner to allow for long-term storage without the necessity for refrigeration. We have developed candidate HPV vaccines consisting of bacteriophage virus-like particles (VLPs) that display a broadly neutralizing epitope derived from the HPV16 minor capsid protein, L2. Immunization with 16L2 VLPs elicited high titer and broadly cross-reactive and cross-neutralizing antibodies against diverse HPV types. In this study we introduce two refinements for our candidate vaccines, with an eye towards enhancing efficacy and clinical applicability in the developing world. First, we assessed the role of antigen dose and boosting on immunogenicity. Mice immunized with 16L2-MS2 VLPs at doses ranging from 2 to 25 μg with or without alum were highly immunogenic at all doses; alum appeared to have an adjuvant effect at the lowest dose. Although boosting enhanced antibody titers, even a single immunization could elicit strong and long-lasting antibody responses. We also developed a method to enhance vaccine stability. Using a spray dry apparatus and a combination of sugars & an amino acid as protein stabilizers, we generated dry powder vaccine formulations of our L2 VLPs. Spray drying of our L2 VLPs did not affect the integrity or immunogenicity of VLPs upon reconstitution. Spray dried VLPs were stable at room temperature and at 37 °C for over one month and the VLPs were highly immunogenic. Taken together, these enhancements are designed to facilitate implementation of a next-generation VLP-based HPV vaccine which addresses U.S. and global disparities in vaccine affordability and access in rural/remote populations.