生长板软骨细胞促进骨髓基质干细胞血管内皮生长因子的表达

目的观察骨髓基质干细胞(BMSCs)在生长板软骨细胞旁分泌作用下血管内皮生长因子(VEGF)的表达规律及其与成骨分化的相关性。方法大鼠BMSCs与生长板软骨细胞进行间接共培养,培养终末期做细胞化学染色,定量测定碱性磷酸酶(ALP)活性,用RT-PCR方法半定量检测VEGFmRNA的表达。结果生长板软骨细胞持续高表达VEGF。BMSCs随共培养时间的延长,ALP活性升高,BMSCs的VEGF的表达也逐渐增强。培养液加入两种分泌型VEGF中和抗体后,VEGF表达趋势不变,ALP活性仍为升高趋势,也不影响培养终末期钙化结节的形成。培养终末期BMSCs的CD31和CD34均阴性。结论BMSCs成骨分化过程中VEGF的表达符合成骨细胞分化基因的表达规律,与成骨细胞特征性基因的表达趋势一致,体外条件共培养条件下,中和VEGF后并不能阻碍BMSCs的成骨分化。     

生物活性陶瓷与细胞外基质骨形成对Ca、P、ALP影响

目的：通过钙(Ca)、磷(P)及碱性磷酸酶(ALP)评价，探讨生物活性陶瓷及细胞外基质与骨细胞相互作用机理，为骨替代材料成骨效应提供依据。方法：选用多种材料进行蒸馏水及血浆接触，体外成骨细胞培养及体内骨诱导试验。采用原子吸收，钼蓝比色及速率法分析化学性能，血浆、细胞冻溶液及组织匀浆中Ca、P、ALP的变化规律。结果：材料组体内、外接触Ca、P、ALP值高于对照组。细胞外基质复合材料组高于相应的非复合材料组。TGF-β1加材料高于BMP复合材料组，而不同材料有所不同，TCP材料高于其它材料。结论：生物活性陶瓷材料均有不同程度的Ca、P离子释放，细胞外基质及Ca、P离子可提高成骨细胞活性，异位骨形成及ALP活性。     

儿童边缘性锌缺乏症综合判断的研究

对沈阳市某幼儿园９９例３～６岁锌缺乏儿童的营养调查和生物样品（血液、尿液和毛发）的分析发现：同对照组儿童相比，锌缺乏儿童除Ｆｅ、维生素Ａ外，其他主要营养素的摄入明显不足；缺锌儿童的发锌、ＲＢＣ锌水平、血清ＡＬＰ活性、尿锌／尿肌酐比值均明显低于对照组。经补锌治疗后血浆锌水平、血清ＡＬＰ活性、尿锌／尿肌酐比值显著升高。应用临床诊断实验的评价方法分析发现结合血浆锌水平，联合使用发锌，血清ＡＬＰ和尿锌／尿肌酐比值３项指标可以准确判断儿童边缘性锌缺乏，这时并联的灵敏度为９６．１８％，串联的特异度可高达到１００％（血清ＡＬＰ活性＜１０４ＩＵ／Ｌ，同时发锌含量＜１１０ｐｐｍ．尿锌／尿肌酐比值＜０．３μｇ／ｇ）。     

实验性汞中毒时肾组织和尿中碱性磷酸酶活性的变化

本研究采用亚急性汞中毒肾损害的大鼠模型,探讨了汞中毒时血、肾和尿中碱性磷酸酶(ALP)活性的变化关系。结果表明,大鼠肾匀浆中 ALP活性明显低于对照组,尿 ALP活性则显著增加。ALP 活性降低的部位在肾近曲小管。体外实验未发现氯化汞对肾、尿ALP 具有直接抑制作用或激活作用。尿中ALP 活性的增高是汞引起的肾小管上皮细胞损伤所致。它可作为汞中毒肾损害的一个观察指标。     

Comparative study of pituitary and bacteria-derived human growth hormone by monoclonal antibodies

We have established hybridoma lines which secrete mouse monoclonal antibodies (Mabs) to human pituitary growth hormone, hGH. Using indirect competitive ELISA and indirect passive hemagglutination inhibition twelve different Mabs were characterized with regard to cross-reactivity with the hGH-related hormones, human chorionic somatomammotropin, hCS, and human prolactin, hPRL. The reactivity of these Mabs with pituitary hGH was compared to that with either bacterially-produced methionyl-hGH or to that of reduced and S-carboxymethylated hGH, which has an altered conformation. None of the Mabs reacted with hPRL. Four did not react with hCS whereas the others showed varying degree of cross-reactivity with hCS. All Mabs reacted more weakly with reduced and S-carboxymethylated hGH than with the native form of the hormone, which was not seen with conventional rabbit antisera to hGH. Thus in the case of hGH the Mabs are superior to conventional antisera in revealing small conformational differences. However the pituitary and bacterially-derived methionyl-hGH were indistinguishable as determined by the 12 Mabs.     

Clonogenicity of normal and malignant hematopoietic progenitor cells after exposure to synthetic alkyl-lymphospholipids

Summary Alkyl-lysophospholipids (ALP) are synthetic analogues of natural lysophosphatidylcholine and represent a new class of anti-tumor agents. They are cytotoxic in vitro with a high selectivity for neoplastic cells which, in contrast to normal cells, lack an alkyl-cleavage enzyme to degrade the adsorbed ALP molecules. As ALP accumulates, it interferes with normal membrane phospholipid turnover and eventually causes disruption of membrane integrity. To evaluate the potential value of ALP in eliminating leukemic cells from remission marrows prior to autologous transplantation, we tested the effect of various ALPs on the clongenicity of normal human marrow cells and on promyelocytic leukemia HL-60. A remarkable difference in the dose response to ALP of normal marrow cells an HL-60 was observed. After an incubation period of 24 h, the same inhibition of clonogenicity in HL-60 occurred at ALP concentrations 4 times lower than in normal marrow cells. Reducing the exposure time to 6 h enhanced the selectivity further: whereas HL-60 colonies were nearly completely inhibited at 16 g ALP/ml, more than 50% of normal CFU-c and BFU-E were recovered after incubation with 48 g/ml. No further increase in selectivity was achieved by changing the incubation temperature. Both thioether- and alkyl-analogues were active and no difference was observed between methoxy- and acylamino-substituted ALPs. We conclude that this selective cytotoxicity makes ALP compounds worth further study as purging agents in autologous bone marrow transplantation programs.Supported by the Deutsche Forschungsgemeinschaft An 111/3     

五倍子水提取物对人牙周膜细胞保护作用的实验研究

目的:观察五倍子水提取物对内毒素(LPS)所致人牙周膜细胞(PDLC)活性降低、超微结构损伤、在牙骨质片表面附着减少、以及碱性磷酸酶(ALP)活性降低的影响,探讨五倍子水提取物对PDLC的保护作用.方法:采用细胞培养技术、3H-TdR掺入法、细胞计数法、透射与扫描电子显微镜技术、酶联免疫技术观察五倍子水提取物对PDLC的保护作用.结果:培养液中加入100μg/mL LPS时,PDLC活性和ALP活性受到明显抑制,超微结构损伤,细胞在牙骨质片表面附着减少.加入五倍子水提取物溶液后,对LPS抑制PDLC活性和ALP活性,以及超微结构损伤、牙骨质片表面附着减少有拮抗作用,该作用随五倍子水提取物浓度增加而增加,到10μg/mL时,达到峰值.结论:五倍子水提取物对PDLC具有保护作用,有望成为防治牙周病的药物.     

不同中药制剂治疗骨折临床观察

目的:探讨复方三七片及复方接骨片在骨折治疗中的作用。方法:选取180例门诊治疗的桡骨远端骨折患者,随机分为复方三七片组、复方接骨片组和对照组。观察3组患者消肿止痛效果、血碱性磷酸酶水平及原始骨痂出现时间。结果:止痛效果显示,复方三七片组及复方接骨片组的止痛效果优于对照组。消肿效果显示,复方三七片及复方接骨片组有效率分别达90%、80%,优于对照组的61.67%。血碱性磷酸酶水平显示,复方三七片及复方接骨片组有效率分别达86.67%、95%,优于对照组的75%。复方三七片及复方接骨片组在第2周即有原始骨痂开始出现,4周内分别有93.33%、96.67%的患者出现原始骨痂,而对照组在第3周才可见原始骨痂出现,4周内有66.67%的患者出现原始骨痂。结论:复方三七片及复方接骨片均能够减轻患部疼痛,促进患部肿胀消退,提高血碱性磷酸酶水平,促进原始骨痂形成。骨折早期(2周内)口服复方三七片有利于消肿止痛,骨折2周后口服复方接骨片有利于骨痂生长、骨折愈合。     

原发性胆汁性胆管炎25-(OH)维生素D、AMA-M2、ALP、IgM相关性研究

目的分析原发性胆汁性胆管炎与25-(OH)维生素D、抗线粒体抗体M2(AMA-M2)、碱性磷酸酶(ALP)、免疫球蛋白M(IgM)间的相关性。方法收集2018年1月至2019年12月28例本院原发性胆汁性胆管炎患者(A组)、20例肝硬化患者(B组)、20例健康体检(C组)进行研究,均检测抗线粒体抗体、25-(OH)维生素D、IgM、ALP等指标,对比研究分析检验结果。结果 (1)A组AMA、AMA-M2阳性率高于B组,差异有统计学意义(P0.05)。(2)三组受检者间25-(OH)维生素D、IgM、ALP水平比较,差异有统计学意义(P0.05);A组与B组间AST水平比较,差异有统计学意义(P0.05)。结论原发性胆汁性胆管炎与25-(OH)维生素D、AMA-M2、ALP、IgM间有着密切关系,联合检测比单一的指标检测,能更好地为临床争取早期诊断、治疗,提供新的思路和科学依据,建议临床推广应用。