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1.
目的 对一个遗传性血管水肿(HAE)家系患者C1抑制物(C1 INH)基因的突变类型进行检测分析。方法 用聚合酶链反应扩增产物直接测序法检测HAE患者C1 INH基因8个外显子及旁侧内含子序列,将检测结果与GenBank公布的C1 INH基因序列相比较,确定突变。为除外多态性可能,在30名正常人中对该突变进行分析。结果 该家系中的5例患者外显子8中均检测到1种新的突变类型(核苷酸序列17839 del C),正常人中无此改变。结论 在该家系中发现C1 INH基因核苷酸序列17839 del C突变,该突变可能是此家系发病的分子基础。  相似文献   

2.
C_1抑制物的遗传缺陷是遗传性血管性水肿(HAE)的基本特征。因C_1抑制物缺乏所致补体过度活化可引起肾脏疾患。本院大约有10%的HAE病例合并有慢性肾小球肾炎。本文报告一个HAE家系,在四代中发现14名患者,其中2例于数年前死于喉水肿。存活的12例中,有3例发生慢性肾小球肾炎。其中1例做了肾活检,病理诊断为系膜增生性肾小球肾炎,其母患HAE并因慢性肾小球肾炎导致慢性肾功能衰竭,其表兄患HAE伴蛋白尿及管型尿。HAE的发作可加重肾脏疾患,故应予以长疗程的丹那唑治疗。  相似文献   

3.
目的 探讨结核分枝杆菌(Mtb)耐药基因突变位点对异烟肼(INH)体外最小抑菌浓度(MIC)的影响.方法 利用基因芯片法筛选耐INH人型Mtb菌株,得到inhA-15(C-T)突变株20株、KatG315(G-C)突变株46株,另筛出非突变株32株.采用罗氏培养法对菌株进行复苏,并进行梯度浓度INH敏感性试验,了解INH对不同菌株的MIC.结果 INH对inhA-15(C-T)突变菌株的MIC为(0.375±0.079)μg/ml,对KatG315(G-C)突变菌株的MIC为(5.757±4.060)μg/ml,对无突变菌株的MIC为(0.061±0.050)μg/ml,各组间比较差异有统计学意义(P<0.05).3株无突变菌株表现为低度耐药,inhA-15(C-T)突变组中有1株表现为敏感,其余表现为耐药,KatG315(G-C)突变菌株均表现为耐药.结论 基因芯片筛选的MtbinhA-15(C-T)和KatG315(G-C)突变株均对INH存在不同程度的耐药,临床可根据不同突变位点菌株的耐药结果初步判断Mtb对INH的耐药性.  相似文献   

4.
遗传性血管性水肿(HAE)是一种罕见的、以反复发作的皮下和/或黏膜下水肿为特征的遗传性疾病。目前已知的发病相关基因包括补体1酯酶抑制剂基因、FⅫ基因、纤维蛋白溶解酶原基因以及血管生成素1基因。本文从已知的基因突变切入,通过分析该突变对于蛋白产物功能的影响,梳理其可能的致病机制,以期为进一步揭示HAE的发病机制以及寻求新的预防和治疗途径提供参考。  相似文献   

5.
目的 研究结核分枝杆菌,rpoB基因突变与多重耐药及利福平耐药程度强弱之间的关系。方法应用绝对浓度法测定58株结核分枝杆菌对4种-线抗结核药物的药敏特性,对耐利福平结核分枝杆菌的耐药谱进行分析。同时对含有核心突变区的结核分枝杆菌,rpoB基因片段进行PCR扩增和DNA测序,分析rpoB基因突变与多重耐药的关系,以及突变位点和突变性质与利福平耐药强弱的相关性。结果58株结核分枝杆菌中,利福平耐药株36株,敏感株22株。36株耐药株均存在,rpoB基因突变,其中88.9%(32/36)至少对利福平和异烟肼同时耐药。90.O%的利福平高度耐药株(18/20)与rpoB基因531位和526位密码子突变相关。密码子531位和526位各有1株双碱基突变,且均为多重耐药株。结论结核分枝杆菌,rpoB基因突变所致的利福平耐药株大部分对异烟肼耐药,因此单独检测rpoB基因突变即可初步筛选多重耐药的结核分枝杆菌;而rpoB基因的突变位点与利福平耐药程度之间具有一定的相关性。  相似文献   

6.
Objective Tuberculosis remains a severe public health issue, and the Beijing family of mycobacterium tuberculosis (M. tuberculosis) is widespread in East Asia, especially in some areas in China, like Beijing and Tianjin. This study aimed at determining the mutation patterns of drug-resistant Beijing strains of M. tuberculosis isolated from Tianjin, China. Methods A total of 822 M. tuberculosis isolates were screened for drug resistance by an absolute concentration method and the genotype was identified by PCR. 169 drug-resistant isolates of the Beijing family were analyzed for the potential mutations in the rpoB, katG, inhA promoter region and in rpsL, rrs and embB genes, which are associated with resistance to rifampin (RFP), isoniazid (INH), streptomycin (SM) and ethambutol (EMB) respectively by PCR and DNA sequencing. Results Fifty-eight out of 63 RFP-resistant isolates were found to carry the mutations within the 81-bp RFP resistance determining region (RRDR) of the rpoB gene and the most frequent mutations occurred at codon 531 (44.4%), 526 (28.6%), and 516 (7.9%) respectively. 16 mutation pattems affecting 12 different codons around the RRDR of rpoB were found. Of 116 INH-resistant isolates, 56 (48.3%) had the mutation of katG 315 (AGC→ACC) (Ser→Thr), 3 (2.6%) carried S315N (AGC→AAC) and 27 (16.0%) had the mutation of inhA-15A→T. 84 out of 122 SM-resistant isolates (68.9%) displayed mutations at the codons 43 or 88 with AAG→AGG (Lys→Arg) of the rpsL gene and 22 (18.0%) with the mutations at positions 513A→C, 516C→T or 905 A→G in the rrs gene. Of 34 EMB-resistant isolates, 6 had mutation with M306V (ATG→GTG), 3 with M306I (ATG→ATT), 1 with M306I (ATG→ATA), 1 with D328Y (GAT→TAT), 1 with V348L (GTC→CTC), and 1 with G406S (GGC→AGC) in the embB gene. Conelusion These novel findings extended our understanding of resistance-related mutations in the Beijing strains of M. tuberculosis and may provide a scientific basis for development of new strategies for diagnosis and control of tuberculosis in China and other countries where Beijing strains are prevalent.  相似文献   

7.
本文报道6例遗传性血管性水肿(HAE)患者的家系调查,发现两个高发病家系,18例患者其中4例死于喉阻塞。对此6例患者和家系调查中3例患者血清中补体含量测定结果表明C_1酯酶抑制剂(C_(1-INH)明显低下,可作为诊断HAE的特异性指标;C_4亦明显低于正常,可作为一种初筛试验;B因子、C_3和C_(1?)在正常范围内,提示旁路途径未受影响和HAE是一种遗传性疾病。本文还报道了HAE患者在发病期、缓解期和治疗期间血清中C_(1-INA)、C_4含量的动态变化。  相似文献   

8.
目的 探讨耐异烟肼结核分枝杆菌及其katG与inhA基因突变的特征,为临床选择抗结核药物治疗提供实验室参考。方法 回顾性分析2015年1月1日-2017年1月1日在上海交通大学附属同仁医院海南分院的260例患者标本,对213例进行结核分枝杆菌分离培养,对47例进行博奥芯片法检测,再对213例培养所得菌株进行博奥芯片检测,对博奥芯片检测的47例痰标本进行结核分枝杆菌分离培养;对101株结核分杆菌进行katG与inhA基因检测。结果 培养法和博奥芯片结核分枝杆菌检出率分别为36.6%(78/213)和48.9%(23/47);培养法和博奥芯片耐多药结核分枝杆菌检出率分别为41.0%(32/78)和47.8%(11/23);博奥芯片法和比例法耐异烟肼符合率98.7%(77/78);男性结核分枝杆菌阳性率45.9%高于女性阳性率29.2%;检测katG基因和inhA基因,3个基因区域都发生突变,突变发生率大小依次为katG315(AGC→ACC)密码子(32株,54.2%)、katG315(AGC→AAC)密码子(16株,27.1%)、inhA-15(C→T)(10株,16.9%)。24株(23.8%,24/101)对异烟肼无突变但对利福平发生突变;43株也同时耐利福平(42.6%,43/101)。突变频率较高的突变位点是315,突变频率为81.4%(48/59),1株(1.7%,1/59)为双位点联合突变且突变频率最低。结论 结核分枝杆菌katG和inhA基因突变与耐INH相关,这为临床及时准确诊断、及早使用抗结核药物联合治疗提供了帮助。  相似文献   

9.
A patient with apparent X-linked agammaglobulinaemia was found to be inordinately susceptible to anaphylactoid reactions to intramuscular injections of gammaglobulin. The patient was found also to have low levels of C1 esterase inhibitor (C1 INH). The possibility that the C1 INH deficiency and in this patient, whether genetic or acquired, fostered the susceptibility to the production of anaphylactoid reactions after gammaglobulin injections urges further studies of the association of C1 INH deficiency and anaphylactoid reactions to gammaglobulin injections. The possibility that C1 INH levels like C1q levels may be low in hypogammaglobulinaemic patients as a consequence of increased catabolism of this regulator of the complement system when IgG levels are low is considered.  相似文献   

10.
Background China is one of the high burden countries of Mycobacterium tuberculosis (TB) infection globally, with high incidence and mortality. We studied the molecular characteristics of rifampin (RIF) and isoniazid (INH) resistant Mycobacterium tuberculosis strains from Beijing, China, in order to find out the genetic marker for rapid detection of specific drug resistance. Methods Forty pansusceptible and 81 resistant strains of Mycobacterium tuberculosis isolated from Beijing, China during 2002-2005 were analyzed. The modified rifampin oligonucleotide (RIFO) assay based on reverse line blot hybridization was used to detect mutations in the 81 bp hot-spot region of rpoB gene, which is associated with RIF resistance. The INH resistance associated genes, regulatory region mab-inhA (-15C/T) and structural gene katG S315T were detected by reverse line blot hybridization and PCR-restriction fragment length polymorphism (RFLP) method respectively. All the strains were typed by spoligotying and the Beijing genotype was further subdivided by NTF locus analysis. The distribution of drug resistance associated mutations in the above genes was compared in these groups. Results Sixty-five (91.5%) of 71 RIF resistant and 52 (92.9%) of 56 multidrug-resistant (MDR, i.e. resistant to at least RIF and INH) strains were found to harbor mutations in the rpoB hot-spot region. No mutation was detected in RIF sensitive strains. The specificity and sensitivity of the modified RIFO assay were 100% and 91.5%, respectively, katG315 AGC〉ACC and inhA-15C〉T mutations were found in 40 (60.6%) and 10 (15.2%) of 66 INH resistant strains, respectively; 7.6% of INH-resistant strains had mutations in both of these genes. Therefore, a combined use of both katG315 and inhA-15 identified 68.2% of INH-resistant strains. The Beijing genotype accounted for 91.7% of total strains and was further subdivided into "modern" (76.6%) and "ancestral" (23.4%) group. There is no significant difference between "ancestral" and "modern" group in prevalance of drug resistance-associated gene mutations. Conclusions The hot-spot region of rpoB gene can be used as genetic marker for detection of RIF resistant strains; a combined use of both katG315 and inhA-15 can improve the detection rate of I NH resistant strains; the Beijing genotype is prevalent in Beijing, China; the modified RIFO assay can be a practical tool for rapid detection of RIF resistant and MDR isolates in the routine diagnostic work.  相似文献   

11.
曾涛  朱中元  张荣意 《中国热带医学》2009,9(9):1655-1657,1661
目的利用LiPA技术检测结核分枝杆菌耐异烟肼katG基因,评价LiPA技术临床应用的可行性。方法应用比例法确定80株结核分枝杆菌临床分离株其耐药性,用katG基因PCR扩增产物进行DNA测序,然后用LiPA检测技术检测结核分枝杆菌katG基因的突变,对比3种方法的检测结果,评估LiPA检测技术的准确性。结果在80株结核分枝杆菌中,35株为异烟肼敏感株,45株为异烟肼耐药株。敏感株katG基因扩增阳性率为100%,耐药株为91.1%(41/45)。耐异烟肼茵株katG的缺失率为8.9%。41株扩增阳性耐药株中有26株检测到315位密码子的突变,分别为ACC(60.97%,25/41),ATC(2.44%,1/41),无突变(36.58%,15/41)。LiPA技术检测、药物敏感性试验和基因测序的结果基本一致。结论结核分枝杆菌katG基因突变的LiPA技术敏感性高,特异性强,可用于结核分枝杆菌的快速药物敏感性试验评价。  相似文献   

12.
Ren HL  Zhang HY 《中华医学杂志》2007,87(39):2772-2776
目的分析遗传性血管性水肿(HAE)患者临床特点,总结HAE发病规律及临床表现模式。方法通过临床问诊、病历查阅、电话随访、家系调查等方法回顾性分析40个HAE家系133例患者临床及实验室资料。结果(1)临床表现:所有患者均有肢体和/或颜面、生殖器水肿史。89例(66.9%)患者病程中出现过喉水肿,有4例患者曾经因喉水肿引起的窒息行气管切开术。102例(76.7%)患者有腹部症状包括轻微腹部不适,甚至难以耐受的腹部绞痛。对就诊时正处于腹痛发作期的6例患者行腹部B超检查,均发现有腹水。(2)发病频率:未经诊治时,100例(75.2%)患者发病频率≤每月1次,31例(23.3%)患者每月发病1~3次,仅2例患者发病频率≥每月4次,即每周发病1-2次。(3)家族史:8例无明确家族史。(4)类型:133例患者中130例为Ⅰ型HAE(HAE-Ⅰ),仅1个家系中的3例患者C1-INH含量略高于正常,C1-INH功能为正常值的2%,诊断为Ⅱ型HAE(HAE-Ⅱ)。(5)长期预防性治疗:本研究中58例(43.6%)采用口服达那唑行长期预防性治疗,对所有患者都能起到预防发作的作用,大多数患者对达那唑耐受良好。结论(1)遗传性血管水肿是一种罕见的常染色体显性遗传病。(2)我国HAE-Ⅱ罕S见,跟国外报道似有不同。(3)长期应用达那唑治疗可有效预防遗传性血管水肿发作,患者耐受性好。  相似文献   

13.
目的:探讨编码过氧化氢-过氧化物酶的katG基因突变与结核分枝杆菌异烟肼(INH)耐药性的相关关系。方法:根据结核分枝杆菌genebank中katG序列,自行设计特异性寡聚核苷酸引物,采用聚合酶链反应-单链构象多态性(polymerase chain reaction-single strand conformation polymorphism,PCR-SSCP)分析和直接测序法(direct sequencing,DS)分析结核分枝杆菌中katG基因突变情况.以H37,Rv标准株为对照。结果:所有23株敏感菌均未有SSCP结果异常;35株耐药菌中,有2株(5.7%)katG基因扩增阴性,且发生在高度耐药菌中.进一步分析发现,SSCP法突变检出23株(65.7%),测序法突变检出24株(68.6%),符合率为95.8%(23/24).结论:参照测序法对耐药菌突变序列的分析结果,PCR-SSCP敏感、特异,可快速检测结核分枝杆菌katG耐药基因突变,有利于耐药结核分枝杆菌耐药性的快速检测。  相似文献   

14.
《中国现代医生》2020,58(34):5-8+封三
目的 对浙东地区耐多药结核分枝杆菌(MDR-TB)耐药性及分子机制进行研究,为治疗耐多药结核病提供理论依据。方法 收集2018 年1 月~2019 年12 月浙江东部9 家结核病定点医院临床分离的结核分枝杆菌。采用比例法检测异烟肼(INH)、利福平(RIF)、氧氟沙星(OFL)、链霉素(SM)、乙胺丁醇(EMB)、阿米卡星(AK)、对氨基水杨酸(PAS)、卷曲霉素(CM)和丙硫异烟胺(TH)对MDR-TB 的耐药性。通过基因芯片方法检测耐多药结核分枝杆菌rpoB、katG、inhA 突变位点,PCR 扩增OFL 耐药的MDR-TB 的gyr 耐药基因并测序。结果 耐多药结核分枝杆菌对OFL、SM、EMB、AK、PSA、CM、TH、INH 和RIF 耐药率分别为38.1%、54.8%、28.6%、11.9%、8.3%、9.5%、13.1%、100.0%和100.0%。耐多药结核分枝杆菌的突变位点为rpoB 511(9 例)、rpoB 513(3 例)、rpoB 516(3 例)、rpoB 526(25 例)、rpoB 531(38 例)、rpoB 533(2 例),KatG 315(71 例),inhA-15(4 例),KatG 315 与inhA-15 同时突变(9 例)。检测到26 株gyrA 基因和2 株gyrB 基因发生突变,突变类型为Thr478Asn、Asn477Thr、Ala90Val、Ser91Pro、Asp94Ala、Asp94His、Asp94Asn 和Asp94Gly。结论 耐多药结核分枝杆菌利福平耐药以rpoB 基因531位点突变为主;异烟肼耐药以KatG 基因315 位点突变为主;MDR-TB 对喹诺酮类药物的耐药机制以gyrA 基因Ala90Val、Ser91Pro、Asp94Gly 突变类型为主。  相似文献   

15.
对30例原发性肝癌患者进行49人次肝动脉灌注化疗和栓塞。19例作灌注化疗加明胶海绵栓塞综合治疗,栓塞后造影可见周围或近端肝动脉栓塞,随访性血管造影见肿瘤血管减少或完全消失,肿瘤缩小,肿瘤坏死区扩大;另11例作单纯性灌注。所有栓塞的病例均有栓塞后综合征,平均存活期半年。灌注化疗加栓塞综合治疗优于单纯性灌注化疗。本文就肝动脉灌注化疗和栓塞的治疗价值、栓塞后综合征、并发症和禁忌症及影响治疗的因素进行讨论。  相似文献   

16.
Detection of ATP2C1 Gene Mutation in Familial Benign Chronic Pemphigus   总被引:1,自引:0,他引:1  
Summary: The ATP2C1 gene mutation in one ease of familial benign chronic pemphigus was investigated.One patient was diagnosed as familial benign chronic pemphigus by pathology, ultrastructral examination and clinical features. Genomic DNA was extracted from blood samples. Mutation of ATP2CI gene was detected by polymerase chain reaction (PCR) and DNA sequencing. The results showed that deletion mutation was detected in ATP2C1 gene in this patient, which was 2374delTTTG. No mutation was found in the family members and normal individuals. It was coneluded that the 2374delTTTG mutation in ATP2C1 gene was the specific mutation for the clinical phenotype for this patient and was a de novo mutation.  相似文献   

17.
HEREDITARY angioedema (HAE) is an autosomal dominant inherited condition which was initially described by Osier in 1888.1 Patients with HAE can develop rapid subcutaneous or submucosal edema involving the hands, feet, limbs, face, intestinal tract, even larynx and trachea. The mortality of an acute attack of HAE without treatment was reported as high as 30%.2 HAE is caused by the deficiency of Cl esterase inhibitor (CIINH) which results in episodes of edema in parts of the human body,  相似文献   

18.
目的:分析6例多发性内分泌肿瘤1型(MEN1)患者及其家系成员的临床特点,研究MEN1基因突变特征?方法:收集患者及家系成员的临床资料,提取6例患者及其各自家系成员(共13例)外周血DNA,对MEN1基因编码区9个外显子进行PCR扩增,产物直接测序?结果:家系1中2例患者和2例家系成员MEN1基因第10外显子存在杂合突变c.1378C>T,家系2中1例患者MEN1基因第2外显子存在杂合突变c.80C>G,家系3中先证者及其母亲MEN1基因第9外显子存在杂合突变c.1225T>C,其余人员均未发现突变?其中MEN1基因突变c.80C>G和c.1225T>C为新发现的突变类型,c.1378C>T为已知突变类型?结论:MEN1基因突变分析有助于MEN 1患者早期诊断及其亲属的筛查?本研究发现2种新的MEN1突变类型能增加研究者对于MEN1遗传学特征的认识?  相似文献   

19.
目的 报道家族性良性慢性天疱疮一家系,并对ATP2C1基因突变进行分析。方法 收集家族性良性慢性天疱疮家系成员的一般资料,进行临床调查,绘制家系图谱。采用PCR及Sanger直接测序法对该家系中4例患者的ATP2C1基因进行检测,并以该家系3例健康者和100例无亲缘关系的正常人作为对照。结果 4例家族性良性慢性天疱疮患者ATP2C1基因的第21号外显子的第472位核苷酸由G变为A,该突变导致原先158位的天冬氨酸变为天冬酰胺(p.Asp158Asn)的错义突变。而家系中健康对照及无亲缘关系的正常人均未发现该突变。结论 ATP2C1基因的第21号外显子的第472位核苷酸由G变为A是ATP2C1基因新的突变位点,可能是家族性良性慢性天疱疮家系发病的主要原因。  相似文献   

20.
基因芯片筛查糖尿病线粒体基因突变   总被引:2,自引:0,他引:2  
Liu SM  Zhou X  Zheng F  Li X  Qin H  Zhang HM  Li D 《中华医学杂志》2006,86(40):2853-2857
目的建立一种快速、准确的高通量检测线粒体DNA突变的基因芯片技术,并探讨这些突变与糖尿病的关系。方法以尼龙膜为介质,通过紫外交联固定28个待测突变位点的野生型和突变型探针,并采用该基因芯片对200例2型糖尿病患者和210名健康对照的线粒体tRNA leu(UUR)基因及ND1基因进行筛查,DNA测序进一步确证突变位点,Mfold和Antheprot软件预测变异型基因及蛋白质二级结构。结果成功研制可检测28个突变位点的线粒体DNA芯片,在糖尿病组检出tRNA leu(UUR)基因13290C突变2例(1.0%),ND1基因突变23例:G3316A突变6例(3.0%)、13394C突变5例(2.5%)、A4164G突变8例(4.0%),T4216C突变2例(1.0%),T3593C(0.5%)和A3606G突变各1例(0.5%);对照组检出G3316A突变1例(0.5%)、A4164G突变5例(2.4%)。这些突变位点的测序结果与基因芯片检测结果一致。两组间仅13394C突变率差异有统计学意义(P=0.027)。G3316A突变导致丙氨酸→苏氨酸,13394C突变导致酪氨酸→组氨酸,13593C突变导致缬氨酸→丙氨酸,T4216C突变导致酪氨酸→组氨酸,A3606G和A4164G突变分别为亮氨酸和蛋氨酸的无意义突变,前4种突变型的ND1蛋白二级结构不同于野生型。结论线粒体DNA芯片是一种快速可靠的高通量基因突变检测方法,ND1基因13394C突变可能参与了线粒体基因缺陷型糖尿病的发病。  相似文献   

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