聚羟基丁酸酯膜引导即刻植入种植体周围骨组织再生的研究

目的：评价聚羟基丁酸酯（ＰＨＢ）膜引导种植体周围骨组织再生的效果。方法：在狗下颌骨即刻植入种植体的颊侧形成骨缺损,覆盖ＰＨＢ膜,与钛膜及空白对照比较,术后１、２、３个月分别取标本,采用大体观察、Ｘ线摄片、组织学、四环素荧光标记方法观察骨组织再生情况。结果：ＰＨＢ膜组种植体周围骨缺损区较空白组有更多的新生骨充填,加速了骨再生过程,与钛膜组类似。结论：ＰＨＢ有良好的生物相容性,可以用作骨组织引导再生膜     

TGF—β1抑制肝癌细胞株BEL—7402的增殖

目的 研究转化生长因子－β１对体外培养肝癌细胞株ＢＥＬ－７４０２增殖的影响。方法 用＾３Ｈ－ＴｄＲ掺入方法检测ＴＧＦ－β１对肝癌细胞株ＢＥＬ－７４０２增殖的抑制率;用逆转录整合酶链方法检测转化生长因子－β１及其Ⅱ型受体在ＢＥＬ－７４０２中的基因表达。     

4种涎腺肿瘤及人胚颌下腺免疫组化对比研究

目的：探讨涎腺肿瘤细胞的形态分化、组织发生及其异质性。方法：采用光镜、免疫组化技术对８例腺淋巴瘤、３例嗜酸性腺瘤、１２例多形性腺瘤及２例上皮－肌上皮癌进行研究,同时观察了５６例胚胎颌下腺组织作为对照。结果：多形性腺癌中导管样结构系肿瘤性闰管结构和肿瘤性分泌管结构;腺淋巴瘤和嗜酸性腺瘤中导管结构系肿瘤性分泌管结构;上皮－肌上皮癌中导管结构系肿瘤性闰管结构;涎腺肿瘤组织结构及抗原表达复杂多样,与人胚涎腺发生过程中结构及抗原表达有相似之处。结论：涎腺肿瘤的复杂性系致瘤因素作用于不同干细胞或同一干细胞不同分化阶段所致。     

一氧化氮及其合酶在家兔粥样硬化动脉的改变及L-精氨酸的作用

为探讨一氧化氮及其合酶在高胆固醇饮食诱导的动脉粥样硬化的改变及Ｌ－精氨酸的抗动脉粥样硬化作用,在高胆固醇饮食诱导的动脉粥样硬化模型上,检测了血清总胆固醇,血浆精氨酸,非对称性二甲基精氨酸和氧化型低密度脂蛋白浓度,主动脉一氧化氮合酶活性,一氧化氮生成量及内膜斑块面积。     

Combined adenine phosphoribosyltransferase and N-acetylgalactosamine-6-sulfate sulfatase deficiency.

We describe a Czech patient with combined adenine phosphoribosyltransferase (APRT) deficiency (2,8-dihydroxyadenine urolithiasis) and N-acetylgalactosamine-6-sulfate sulfatase (GALNS) deficiency (mucopolysaccharidosis Type IVA, Morquio disease A). Adenine and its extremely insoluble derivative, 2,8-dihydroxyadenine, were identified in the urine, and APRT deficiency was confirmed in erythrocytes. There was excessive excretion of keratan sulfate in the urine, and GALNS deficiency was confirmed in leukocytes. GALNS and APRT are both located on chromosome 16q24.3, suggesting that the patient had a deletion involving both genes. PCR amplification of genomic DNA indicated that a novel junction was created by the fusion of sequences distal to GALNS exon 2 and proximal to APRT exon 3, and that the size of the deleted region was approximately 100 kb. The deletion breakpoints were localized within GALNS intron 2 and APRT intron 2. Several other genes, including the alpha subunit of cytochrome B (CYBA), which is deleted or mutated in the autosomal form of chronic granulomatous disease, are located in the 16q24.3 region, but PCR amplification showed that this gene was present in the proband. A patient with hemizygosity for GALNS deficiency and APRT deficiency has been reported from Japan recently. These findings indicate that: (i) APRT is located telomeric to GALNS; (ii) GALNS and APRT are transcribed in the same orientation (centromeric to telomeric); and (iii) combined APRT/GALNS deficiency may be more common than hitherto realized.     

抗肝癌NMP单克隆抗体的制备及初步鉴定

为制备出具较高特异性抗肝癌核基质蛋白单克隆抗体,以用于肝癌的基础和临床的研究。首次免疫用肝癌细胞纯核,用高盐抽提法提取的肝癌细胞核基质蛋白加强免疫Ｂａｌｂ／ｃ小鼠,取其脾细胞与ＳＰ２／０骨髓瘤细胞融合,ＥＬＩＳＡ法同时测定培养上清对肝癌核基质蛋白及正常肝细胞核基质蛋白的免疫反应,ＬＳＡＢ法进行单抗的鉴定。结果：建立了一株能稳定分泌抗肝癌核基质蛋白单抗的杂交瘤细胞株２Ｇ８,染色体数目为８６－９２,Ｉ     

遗传性脊髓小脑型共济失调的CAG三核苷酸突变检测

目的 评价ＳＣＡ１、ＳＣＡ２、ＳＣＡ３／ＭｊＤ、ＳＣＡ６、ＳＣＡ７和ＤＲＰＬＡ的ＣＡＧ三核苷酸异常扩增突变「（ＣＡＧ）ｎ」,在中国人遗传性脊髓小脑型共济失调（ｓｐｉｎｏｃｅｒｅｂｅｌｌａｒ ａｔａｘｉａ,ＳＣＡ）患者的分布频率。方法 经聚合酶链反应、变性聚丙烯酰按凝胶电泳和银染显带技术,检测分析了８５个中国人常染色体显性遗传ＳＣＡ家系（其中患者１６７例）和３７例散发ＳＣＡ患者的ＳＣＡ１、ＳＣＡ２、     

β七叶皂甙钠与甘露醇降低急性颅脑外伤患者颅内压的疗效比较

目的：探讨β七叶皂甙钠与甘露醇对降低急性颅脑外伤患者颅内压（ＩＣＰ）的疗效和利尿作用的比较。方法：５０例急性颅脑外伤患者（观察组）伤后应用β七叶皂甙钠２０ｍｇ加生理盐水５０ｍｌ静注,每日总量６０ｍｇ,连用７日。对照组２０例应用２０％甘露醇２５０ｍｌ静注,每日２～３次,连用７日。检测２组患者ＩＣＰ变化及尿量、尿比重变化。结果：β七叶皂甙钠降ＩＣＰ作用的起效时间、作用高峰时间和作用持续时间〔分别为（０．５５±０．３１）ｈ、（２．３０±０．５０）ｈ和（５．３０±１．９６）ｈ〕与２０％甘露醇的作用〔分别为（０．４０±０．１２）ｈ、（０．８６±０．５４）ｈ和（４．２３±１．５０）ｈ〕比较,均有显著性差异（Ｐ＜０．０５,Ｐ＜０．００１和Ｐ＜０．０１）。利尿作用和血电解质、生化指标变化,２组均无显著性差异。结论：β七叶皂甙钠降低急性颅脑外伤患者ＩＣＰ作用明显,作用持续时间长于甘露醇,对肾脏损害作用小。     

The effect of arginine or glycine supplementation on gastrointestinal function, muscle injury, serum amino acid concentrations and performance during a marathon run.

Gastrointestinal bleeding and increased intestinal permeability have been observed in marathon runners. We sought to determine if L-arginine would be useful for prevention of these complications. Twenty-three runners were randomized to receive L-arginine (A) or glycine (placebo) (G), 10 grams 3 times daily for 14 days prior to the 1997 Houston-Methodist Marathon. Serum, stool hemoccults and lactulose:mannitol permeabilities were obtained at baseline, immediately after completion of the marathon and approximately 48 hours later. Runners rated their symptoms of nausea and vomiting, belching and indigestion, abdominal pain and bloating, diarrhea, and extremity pain on a 1-5 scale of increasing severity. The L:M was unchanged in either group during the three collections. Occult bleeding occurred in 8%/20% in A and G groups, respectively, p = NS) immediately post-marathon. No runners had occult bleeding 48 hours post-race. Gastrointestinal symptom scores were minimal to nonexistent. Extremity pain scores were similar for groups A and G (2.1+/-1.4 and 2.8+/-1.6, respectively, (p = NS). Fluid intake was similar between both groups (1875+/-1547 vs. 1506+/-970 ml, p = NS). Serum amylase was normal at baseline and remained virtually unchanged. Serum lipase was normal at baseline and immediately post-race in both groups, but increased at 48 hours post-race (82.2+/-34.3 to 121.5+/-53.3 mg/dl [A], p = 0.02 and 114.3+/-55.7 to 181.9+/-162.2 mg/dl [G], p = 0.09). CPK increased significantly and similarly in both groups immediately post-race, and even more dramatically 48 hours post-race (130.3+/-130.8 to 738.8+/-902.9, p = 0.007 to 1966.5+/-3.166.0 mg/dl [A] and 140.9+/-77.9 to 863.0+/-772.3, p = 0.003 to 5619+/-10636.8mg/dl [G]). Modest post-race decreases were seen in most serum amino acids in both groups. Finish times were longer than predicted (23+/-21 and 9+/-7 min for A and G groups, respectively, p = 0.049). Our study failed to show a clear benefit of arginine supplementation for the prevention of intestinal ischemia/reperfusion injury associated with endurance running, but either a detrimental affect on performance with arginine, or enhanced performance with glycine. Skeletal muscle injury was unaffected by arginine or glycine supplementation. The delayed increase in serum lipase suggests mild pancreatic injury, affected by either arginine or glycine supplementation.     

参芪口服液对血液流变学及血小板聚集的影响

观察参芪口服液对“血瘀”模型大鼠血液流变学及血小板聚集的影响,以及参芪口服液对ADP诱导的家兔体外血小板聚集的影响。实验表明参芪口服液对全血粘度、红细胞压积均有显著改善,同时显著降低血小板聚集率。提示参芪口服液具有改善血液流变学,抗血小板聚集作用。同时观察了丹参、黄芪单味药应用及配伍应用对血液流变学及血小板聚集的影响。