ACE基因多态性及循环中酶活性与EHT的关系及赖诺普利对其疗效的观察

对１１０例原发性高血压（ＥＨＴ）患者和１６３例正常对照者取血测定其血管紧张素转换酶（ＡＣＥ）基因Ｉ与 Ｄ多态性及循环中酶活性。高血压组Ｄ等位基因频率高于对照组,分别为 ０．５１８　２和０．４３２ ５（Ｐ＜０．０５）。两组中ＡＣＥ活性均存在ＤＤ＞ＩＤ＞Ⅱ。高血压组及对照组ＩＤ型ＡＣＥ活性分别为３１４．１±６７．９４和２５８．３５±６４．１１（Ｐ＜０．０１）,Ⅱ型分别为２５９．６８±６９．６８和２２０．８８±６２．８５（Ｐ＜０．０５）。高血压组应用赖诺普利后各基因型患者血压均有明显下降,降压幅度ＤＤ＞ＩＤ＞Ⅱ。结果显示ＡＣＥ基因多态性与原发性高血压有密切关系,ＤＤ型有高易患性。ＡＣＥ活性受基因型控制,ＤＤ型活性最高。应用赖诺普利后各基因型血压均有下降,降压幅度 ＤＤ＞ ＩＤ＞ Ⅱ。 ＤＤ型可作为ＡＣＥ抑制剂应用的最佳指征。     

No effect of a Taql polymorphism in DNA at the endothelin I (EDN1) locus on normal blood pressure level or variability

Endothelin is a peptide reported to be one of the most potent vasoconstrictors known. Presumably, endothelin could play a role in the physiological regulation of blood pressure in healthy or hypertensive people. We have studied a normal restriction fragment length polymorphism (RFLP) at the endothelin-I (EDN1) locus detected with the restriction enzyme TaqI. In three different series comprising 166, 120 and 207 unrelated individuals, we found no evidence for association between genotype in this polymorphism and level of systolic or diastolic blood pressure. In two series of 156 and 117 monozygotic (MZ) twin pairs, respectively, there was no difference between genotypes in within-pair variation in systolic or diastolic blood pressure. Thus neither "level gene" nor "variability gene" effects of normal genes at the EDN1 locus could be detected with the polymorphism analyzed, in healthy population samples.     

全人源肝癌噬菌体单链抗体的筛选及特异性鉴定

目的对全人源肝癌噬菌体单链抗体库进行鉴定,筛选肝癌抗体,同时对抗体的活性及特异性进行鉴定。方法PCR鉴定阳性重组菌TG1中人肝癌ScFv的插入率。先以人成纤维细胞吸附后再以体外培养的肝癌细胞SMMC7721为抗原对所建抗体库进行3轮“吸附洗脱扩增”的亲和筛选。将筛选后的ScFv进行PCR鉴定及双酶切鉴定;通过ELISA法及FCM鉴定其与人肝癌细胞及正常细胞的结合活性。结果ScFv基因插入率为70%。在亲和筛选过程中,肝癌噬菌体单链抗体得到富集,收获率逐轮得到提高,第3轮为第1轮的214倍。筛选后的ScFv进行PCR鉴定及双酶切鉴定,均可检测到目的基因。ELISA分析结果显示18个克隆与SMMC7721呈阳性反应,阳性率为90%,15个克隆与成纤维细胞有交叉反应。得到3株肝癌单链抗体。ScFv的FCM鉴定表明,以正常胎肝细胞L02为对照,ScFv与肝癌结合比率为41.3%。特异性鉴定表明,其与肝癌细胞结合活性明显高于正常细胞。结论利用噬菌体抗体库技术结合减数筛选得到了肝癌噬菌体单链抗体及其基因,且筛选后的抗体片段与人肝癌细胞有特异性的结合活性。     

贵州省2004年分离到的脊髓灰质炎病毒分子生物学特征

目的研究贵州省2004年分离到的脊髓灰质炎(脊灰)病毒分子生物学特征。方法对贵州省2004年分离到的所有脊灰病毒,用聚合酶链反应-限制性酶切片段长度多态性分析(PCR-RFLP)和酶联免疫吸附试验(ELISA)法进行了型内鉴定,并对型内鉴定异常株进行了VP1区的序列测定。结果贵州省在2004年急性弛缓性麻痹(AFP)病例及接触者、流动人口和健康儿童的粪便标本中,共有95例分离到脊灰病毒。其中Ⅰ型22例,Ⅱ型26例,Ⅲ型21例,混合型19例,脊灰病毒混合非脊灰肠道病毒7例。经用PCR-RFLP和ELISA方法进行型内鉴定,共有16株病毒与疫苗株病毒存在差异,其中3株脊灰病毒与疫苗株病毒在PCR-RFLP图谱上有差异[其中1株同时为双反应(DRV)],3株ELISA结果为DRV,11株ELISA结果为非疫苗类似株(NSL)。在这些型内鉴定异常株病毒中,Ⅰ型13株,Ⅱ型3株。对这16株脊灰病毒进行VP1区序列测定,发现9株Ⅰ型疫苗衍生脊灰病毒(VDPV)和1株Ⅱ型VDPV。结论根据对贵州省2004年从95例AFP病例及接触者、流动人口、健康儿童分离的脊灰病毒的血清定型结果和型内鉴定结果及对13株Ⅰ型和8株Ⅱ型脊灰病毒VP1区核苷酸序列测定证实,脊灰减毒活疫苗病毒在人群的循环导致疫苗病毒神经毒力恢复突变。通过AFP病例监测系统及时发现了Ⅰ型VDPV的循环和Ⅱ型VDPV。对2004年下半年脊灰病毒基因特点的分析,提示贵州省已经阻断了Ⅰ型VDPV的循环。     

交锁髓内钉治疗胫骨干长节段粉碎性骨折

目的：阐明交锁髓内钉内固定治疗胫骨干多节段粉碎性骨折的优越性和手术要点。方法：分析2000年6月-2004年12月26例胫骨干长节段粉碎性骨折使用交锁髓内钉固定的疗效和手术注意事项。手术采用闭合穿钉。有限切开复位．部分钢丝捆绑复位碎骨块．再用瞄准器镇定骨折远、近端。结果：26例均获得随访，随访平均时间16．5个月（6-60个月）。远期疗效按马元璋评定标准：优13例．良10例．可3例．优良率88．5％（23／26）．平均骨临床愈合时间5．5月．一期骨折愈合率达到80．8％（21／26）。仅1例髓内钉发生锁钉断裂。无深部感染、骨髓炎、畸形愈合、骨不连的发生。结论：交锁髓内钉治疗胫骨干长节段粉碎性骨折较钢板有着微刨和更符合胫骨生物力学等优越性。本组骨折愈合率高．并发症少。认为是目前治疗胫骨干长节段粉碎性骨折的首选方法。     

LMP2基因多态性及夫妻共享率与重度子痫前期的相关性研究

目的 测定重度子痫前期（severe pre-eclampsia，S-PE）患者和正常孕妇多功能蛋白酶（large muhifunctional protease，LMP2）基因多态性及夫妻共享率，探讨该基因与S-PE发病的相关性。方法 选择102例S-PE患者及其配偶为研究对象，随机选择200例正常孕妇及其配偶作为对照。所选孕妇均为单胎初孕，孕35～40周。各取2ml外周静脉血抽提DNA，应用PCR—RFLP方法进行LMP2基因分型。结果 LMP2R／H在S-PE患者中的分布频率显著高于正常孕妇组（53．9％和35．5％，P〈0．01），LMP2R／R在S-PE患者中的分布频率显著低于正常孕妇组（41．2％和58．5％，P〈0．01）。LMP2R／H在S-PE组的夫妻共享率与正常孕妇组的相比显著增高（24．5％和10．5％，P〈0．01）。结论 LMP2R／H很可能为S-PE发病的易感基因；而LMP2R／R可能是S-PE的保护基因。     

Association of vitamin D receptor and estrogen receptor-αgene polymorphism with peak bone mass and bone size in Chinese women

AIM: To investigate if vitamin D receptor (VDR) gene Apa I polymorphism and estrogen receptor-α (ER-α) gene Pvu II, Xba I polymorphisms are related to bone mineral density (BMD), bone mineral content (BMC) and bone size in premenopausal Chinese women. METHODS: The VDR Apa I genotype and ER-α Pvu II, Xba I genotype were determined by PCR-restriction fragment length polymorphism (RFLP) in 493 unrelated healthy women aged 20-40 years of Han nationality in Shanghai city.…     

The Butterfly Fragment in Wedge‐Shaped Femoral Shaft Fracture: Comparison of Two Different Surgical Methods

ObjectiveOur study compared the results of wedge‐shaped femoral shaft fracture following intramedullary (IM) nailing with or without fixation of the third fragment.MethodsWe retrospectively reviewed patients presenting with femoral shaft fracture with AO/OTA type 32‐B from 2011 to 2016. Patients were divided into two groups: closed reduction without touching the third fragment and open reduction with fixation of the third fragment. The fragment ratio, fragment length, nail size, dynamization or not, mRUST scores, union rate, and union time were compared between the two groups. Risk factors of non‐union were also investigated, including sex, age, fracture pattern, fracture location, dynamization, nail size, fragment ratio, fragment size, and postoperative fragment displacement.ResultsA total of 80 patients met inclusion criteria, 20 patients with wedge‐shaped shaft femoral fracture were managed with IM nailing and open reduction with fixation of the third fragment. Sixty patients were treated with IM nail without touching the third fragment. The union rate for the fixation and non‐fixation groups were 60.0% and 81.7%, respectively. The mean union time for the fixation group was 19 months vs 14 months for the non‐fixation group. Multi‐regression analysis showed larger nail size (odds ratio: 2.26) and fixation of the third fragment (odds ratio: 0.18) influenced fracture healing.ConclusionsFixation of the third fragment in wedge‐shaped shaft femoral fracture results in a longer union time and lower union rate. In the management of femoral fracture with a third fragment, a larger nail size is recommended and fixation should be performed in a closed manner. Fixation of the fragment may achieve better fracture reduction. However, disruption of the vasculature and surrounding structures may further result in nonunion of the fracture site.     

骨代谢标志物与骨密度预测经皮穿刺椎体成形术后椎体再骨折的价值

目的 探讨椎体骨密度及骨代谢标志物在老年骨质疏松性胸腰椎骨折经皮穿刺椎体成形术(percutaneous vertebro plasty,PVP)后预测椎体再骨折发生的价值.方法 采用回顾性分析方法收集2018年1月-2019年1月在同济大学附属第十人民医院接受椎体成形术治疗的老年骨质疏松性胸腰椎压缩性骨折患者50例,...     

电化学发光技术检测恶性胸腔积液中肿瘤标志物的价值

目的 观察在恶性胸腔积液中肿瘤标志物癌胚抗原（CEA）、糖类抗原125（CA125）、细胞角蛋白19片段（CYFRA21-1）和神经元特异性烯醇化酶（NSE）含量的变化。方法 采用电化学发光技术检测126例胸水标本中4项肿瘤标志物的含量;其中恶性胸腔积液74例,良性胸腔积液52例。结果 恶性胸腔积液中4项肿瘤标志物的含量,与良性胸腔积液中的含量差异有统计学意义（P〈O．05）。4项肿瘤标志物检测组诊断恶性胸腔积液的敏感性和准确性分别为90．5％和89．7％,在诊断价值上优于其他组合。结论 运用电化学发光技术检测CEA、CYFRA21-1、NSE和CA1254项肿瘤标志物,在鉴别诊断良恶性胸腔积液方面有一定应用价值。