MDR1 C3435T基因多态性对胃溃疡患者抗Hp治疗效果的影响

目的探讨多耐药基因(MDR)1 C3435T多态性对幽门螺杆菌(HP)感染胃溃疡患者治疗效果的影响。方法选取80例HP阳性胃溃疡患者为观察组,另选取80例非HP阳性胃溃疡患者及正常体检者为对照1组及对照2组,采用聚合酶链式反应(PCR)测定三组MDR1 C3435T基因多态性。观察组患者给予三联疗法(兰索拉唑+阿莫西林+克拉霉素)治疗,分析不同基因型HP阳性胃溃疡患者治疗后HP阳性率及耐药率。结果与对照1组及对照2组相比,观察组患者TT型MDR1 C3435T基因比例显著高于对照组,T等位基因频率高于对照1组及对照2组(P<0.05)。与对照2组相比,对照1组患者CT型、TT型MDR1 C3435T基因比例及T等位基因频率较高(P<0.05)。观察组患者中TT基因型患者经三联疗法治疗后HP阳性率及耐药率较高(P<0.05)。结论 MDR1 C3435T基因型可影响HP阳性胃溃疡患者三联疗法治疗效果,其中TT型基因的HP阳性胃溃疡患者HP根治率较低,耐药性较高。     

鼻咽癌放射敏感性与MDR1基因多态性的相关性

目的探讨鼻咽癌放射敏感性差异与多药耐药基因（MDRI）多态性的相关性。方法选择48例行根治性放疗的鼻咽癌患者,根据放疗疗效分为抵抗组和敏感组,针对MDR1基因多态性（21外显子G2677T和26外显子C3435T）行PCR扩增、基因测序分型及构建G2677T—C3435T单体型。结果G2677T TT基因型放射敏感性显著低于GG和GT基因型（P=0．017）,C3435T TT基因型放射敏感性显著低于CC和CT基因型（P=0．022）,携带2677T-3435T单体型的患者放射敏感性显著低于其他单体型携带者（P=0．013）。结论MDR1 G2677T和C3435T多态性可能提示鼻咽癌根治性放疗的疗效。     

CYP2C19基因多态性对埃索美拉唑三联疗法根除幽门螺杆菌疗效的影响

目的 研究CYP2C19(cytochrome P450 2C19)基因多态性对以埃索美拉唑为基础三联1周疗法的Hp根除率的影响.方法 选取101例Hp阳性的慢性胃炎或消化性溃疡患者,分成2组,分别进入埃索美拉唑联合阿莫西林与克拉霉素方案(EAC)或奥美拉唑联合阿莫西林与克拉霉素方案(OAC)进行1周根除治疗.治疗前采...     

MDR1基因G2677T/C3435T多态性对鼻咽癌放疗疗效的影响

目的探讨多药耐药基因（MDR1）21外显子G2677T和26外显子C3435T多态性对鼻咽癌根治性放疗疗效的影响。方法采用PCR和限制性片断长度多态性（RFLP）对59例鼻咽癌患者行MDR1基因分型,并用测序法验证。结果G2677T GG基因型携带者行根治性放疗的效果优于GT和TT基因型,但差异无显著性;C3435T CC基因型携带者放射敏感性显著强于CT和TT基因型携带者（P=0．026）。结论MDR1基因多态性可作为鼻咽癌患者放射敏感度的遗传学标志。     

MDR1、CYP3A 基因多态性对维吾尔族、汉族心力衰竭患者地高辛血药浓度的影响

目的：观察多药耐药基因1（MDR1） C3435T、细胞色素P450（CYP）3A4*18B对维吾尔族、汉族充血性心力衰竭（简称心衰）患者地高辛血药浓度的影响。方法选择维吾尔族、汉族心衰患者各40例,均口服地高辛0．125 mg/（次· d）至少1周。抽取清晨空腹静脉血后,采用PCR-RFLP法检测患者MDR1 C3435T、CYP3A4*18B基因型,日立741-0050全自动生化分析仪检测地高辛血药浓度。结果汉族MDR1 C3435T基因CT、TT型患者地高辛血药浓度均高于 CC 型和维吾尔族同基因型, P 均＜0．05;维吾尔族 MDR1 C3435T 各基因型及两民族CYP3A4*18B各基因型患者地高辛血药浓度比较,P均＞0．05。结论 MDR1 C3435T基因多态性可能会提高汉族心衰患者的地高辛血药浓度,但对维吾尔族患者则无影响;而CYP3A4*18B基因多态性对两民族心衰患者的地高辛血药浓度均没有明显影响。     

克拉霉素为基础的三联方案根除幽门螺杆菌的疗效研究

克拉霉素是根除幽门螺杆菌（Hpylori）感染的有效药物,以克拉霉素为基础的三联方案根除Hpylori在临床上广泛应用。目的：评估克拉霉素为基础的三联方案根除日．pylori的疗效。方法：133例Hpylori感染患者随机分为3组,A组：埃索美拉唑20mgbid＋克拉霉素0．5gbid＋阿莫西林1gbid,疗程7d;B组：埃索美拉唑20mgbid＋克拉霉素0．5gbid＋左氧氟沙星0．5gqd,疗程7d;C组：埃索美拉唑20mgbid＋克拉霉素0．5gbid＋呋喃唑酮0．1gtid,疗程7d。治疗结束后4～8周复查”C-尿素呼气试验和快速尿素酶试验以评估根除疗效。结果：128例患者按方案完成治疗。A、B、C组按意向治疗（11-r）分析日．pylori根除率分别为84．4％、77．3％、75．0％,按方案（PP）分析分别为88．4％、79,1％、78．6％。A组的11Tr和PP根除率高于B组和C组,但差异无统计学意义（P〉0．05）。结论：克拉霉素联合质子泵抑制剂（PPI）和阿莫西林7d疗法仍为有效的Hpylori感染根除方案。     

NSCLC患者XPG、MDR-1基因单核苷酸多态性与铂类药物化疗疗效的关系

目的探讨晚期非小细胞肺癌（NSCLC）患者XPG、MDR-1基因单核苷酸多态性与铂类药物短期化疗疗效的关系。方法对61例晚期NSCLC患者，采用顺铂（DDP）为主的化疗方案治疗，2～3个周期后进行临床疗效评价。以PCR—RLFP方法进行XPGC3507G、MDR-1C3435T、MDR-1G2677A／T的基因型分析，比较不同基因型患者的化疗效果。结果MDR1C3435T型为C／C者的化疗有效率为59．3％，显著高于至少含有一个T等位基因者的26．5％（OR=0．442，95％CI=0．133～1．467，P〈0．05）；MDR-1G2677A／T位点至少一个T等位基因者的化疗有效率13．0%，要显著低于其他基因型者的57．9％（OR=0．384，95％CI=0．187～0．789，P〈0．01）；XPGC3057位点各基因型化疗有效率差异无统计学意义。结论MDR-1C3435T、MDR-1G2677A／T位点多态性可降低铂类药物治疗治疗NSCLC的疗效。XPGC3507G位点多态性对铂类药物治疗NSCLS疗效无影响。     

CYP2C19基因多态性对雷贝拉唑三联疗法根除幽门螺杆菌疗效的影响

目的 分析CYP2C19基因多态性在含雷贝拉唑的不同三联方案中对幽门螺杆菌(Hp)根除率的影响。方法 连续收集128例Hp培养阳性的病人随机进入雷贝拉唑联合克拉霉素与羟氨苄青霉素方案(RAC)或雷贝拉唑联合羟氨苄青霉素与甲硝唑方案(RAM)进行1周根除治疗。治疗前CYP2C19基因多态性通过PCR-限制性片段长度多态性进行鉴定,治疗结束至少4周后Hp的状态用”C-呼气试验进行检测。结果 在128例病人中纯合子强代谢型(hom-Ems)、杂合子强代谢型(het-Ems)、弱代谢型(PMs)分别为30．5％、50．0％、19．5％。在无克拉霉素、甲硝唑耐药菌株的情况下,RAC方案与RAM方案的Hp根除率分别为98．1％与91．3％(按治疗方案分析)。但是,甲硝唑的耐药率高达66．8％,降低了RAM方案的Hp根除率。logistic回归分析显示不同的CYP2C19基因型对Hp的根除率没有显著的影响。结论 以雷贝拉唑为基础的三联疗法根除Hp无明显个体差异,RAC的治疗方案值得推荐。     

多药耐药性基因1(MDR1)基因多态性对丙戊酸钠治疗老年癫痫血药浓度的影响

目的 探讨多药耐药性基因1(multidrug resistance 1 gene, MDR1)基因多态性对丙戊酸钠治疗老年癫痫血药浓度的影响。方法 选择2021年10月1日—2022年10月1日于淮北矿工总医院诊治的老年癫痫患者86例为研究对象，采用多聚酶连锁反应-限制性片段长度多态性(Polymerase chain reaction-restriction fragment length polymorphism, PCR-RFLP)和测序技术确定MDR1 C3435T位点基因型分布情况，采用柱前衍生化法(HPLC法)测定丙戊酸血清药物浓度，分析MDR1 C3435T基因多态性与丙戊酸钠治疗老年癫痫血药浓度的相关性。结果 不同MDR1 C3435T基因型患者丙戊酸钠血药浓度差异有统计学意义(P<0.05)。与CC基因型组比较，TT基因型组和CT基因型组的丙戊酸钠血药浓度均显著升高(P<0.05)。老年癫痫患者使用丙戊酸钠后，突变组胃肠道反应、嗜睡、肝功能异常、肾功能异常等总不良反应发生率显著高于CC基因型组(P<0.05)。结论 MDR1 C3435T的TT基因...     

布拉氏酵母菌联合标准三联疗法根除幽门螺杆菌的疗效研究

幽门螺杆菌（Hp）感染与慢性活动性胃炎、消化性溃疡、胃癌等疾病的发生密切相关。近年来随着Hp对抗生素耐药率的升高,标准三联疗法根除印的疗效逐年下降。目的：评价布拉氏酵母菌（S．boulardii）联合标准三联疗法根除却的有效性和安全性。方法：135例经胃镜检查诊断为慢性活动性胃炎并经^13C-尿素呼气试验（^13C-UBT）证实坳感染的患者随机分为3组,A组：口服克拉霉素500mgbid＋阿莫西林1gbid＋雷贝拉唑10mgbid＋S．boulardii散剂250mgbid,疗程7d;B组：前7d口服S．boulardii散剂250mgbid,后7d口服克拉霉素500mgbid＋阿莫西林1gbid＋雷贝拉唑10mgbid＋S．boulardii散剂250mgbid;C组：口服克拉霉素500mgbid＋阿莫西林1gbid＋雷贝拉唑10mgbid,疗程7d。治疗结束后4周复查^13C—UBT以评估根除疗效。结果：128例患者按方案完成治疗。A、B、C组按意向治疗（ITT）分析坳根除率分别为75．6％、80．0％、62．2％,按方案（PP）分析印根除率分别为82．9％、83．7％、63．6％,A、B组PP根除率显著高于C组（P〈0．05）,ITT根除率与C组比较差异无统计学意义（P〉0．05）,A组I．IT和PP根除率与B组比较差异无统计学意义（P〉0．05）。A、B组不良反应发生率显著低于C组（39．0％、18．6％对63．6％,P〈0．05）,B组显著低于A组（P〈0．05）。A、B组对药物的耐受程度显著高于C组（P〈0．05）,B组显著高于A组（P〈0．05）。结论：S．boulardii联合标准三联疗法可提高印根除率,且安全性较高。     

Effects of CYP2C19 and MDR1 genotype on the eradication rate of Helicobacter pylori infection by triple therapy with pantoprazole, amoxycillin and clarithromycin

Backgrounds:  CYP2C19 polymorphism plays an important role in the metabolism of proton pump inhibitors. The multidrug resistance (MDR)1 genotype is associated with the successful eradication of Helicobacter pylori . The aim of the present study was to investigate the effects of CYP2C19 and MDR1 genotypes on the eradication rate of H. pylori using a pantoprazole-based triple therapy.
Methods:  A total of 210 patients infected with H. pylori were treated with 40 mg pantoprazole, 500 mg clarithromycin and 1000 mg amoxicillin twice daily for 7 days. The CYP2C19 genotype was determined with polymerase chain reaction (PCR)–restriction fragment length polymorphism analysis. The MDR1 C3435T polymorphism was identified by PCR-based allele-specific amplification (PCR-ASA).
Results:  Of the 210 patients who completed the study, 174 (82.9%, 95.0% confidence interval [CI], 77.8–88.0%) achieved successful eradication after the first cycle of therapy. The eradication rates for H. pylori were 86.7%, 81.1% and 82.1% in the homozygous extensive, heterozygous extensive and poor metabolizer groups, respectively ( P  = 0.65). Moreover, the cure rates in the CC, CT, and TT groups were 82.7%, 84.4% and 76.9%, respectively ( P  = 0.66). Multiple logistic regression analysis revealed that endoscopic diagnosis was a significant independent risk factor for treatment failure.
Conclusion:  The eradication rates of H. pylori by pantoprazole, amoxicillin and clarithromycin were not significantly different among the CYP2C19 and MDR1 genotypes. Hence, the cure rate of H. pylori in the Korean population was no different for the CYP2C19 and MDR1 genotypes.     

Adjuvant effect of vitamin C on omeprazole-amoxicillin-clarithromycin triple therapy for Helicobacter pylori eradication

BACKGROUND/AIMS: To test the impact of vitamin C supplementation on triple therapy for H. pylori eradication. METHODOLOGY: A total of 171 H. pylori-infected patients were randomized to receive different one-week triple therapies, including 20 mg omeprazole, 1 g amoxicillin, plus the following twice daily: (1) 250 mg clarithromycin (C250 group, n=55); (2) 250 mg clarithromycin and 500 mg vitamin C (V-C250 group, n=61); (3) 500 mg clarithromycin (C500 group, n=55). Six weeks after treatment, the success of H. pylori eradication was assessed by a 13C-urea breath test. Each collected H. pylori strain was defined as either clarithromycin susceptible or resistant by E-test. RESULTS: The demographic background, clarithromycin susceptibility of H. pylori, and drug compliance were similar among the three groups (p=NS). For clarithromycin susceptible infection, the V-C250 group had a higher eradication rate than the C250 group (ITT: 85% vs. 68% and PP: 90% vs. 73%, p = 0.03), but had an equivalent rate to the C500 group (p=NS). For clarithromycin resistant infection, all three groups had a similarly poor eradication rate of less than 34%. CONCLUSIONS: Adding vitamin C to one-week triple therapy can reduce the dosage of clarithromycin, but preserve the high eradication efficacy for clarithromycin susceptible H. pylori infection.     

Polymorphism of interleukin-1beta affects the eradication rates of Helicobacter pylori by triple therapy.

BACKGROUND AND AIMS: Polymorphism in interleukin-1beta (IL-1beta) is associated with intragastric pH levels in Helicobacter pylori-positive subjects. Intragastric pH levels affect the activity of antibiotics against H. pylori in the stomach. The aim of this study was to investigate whether IL-1beta polymorphism is associated with eradication rates of H. pylori by triple therapy with a proton pump inhibitor (PPI), amoxicillin, and clarithromycin. METHODS: Three hundred thirty-six patients infected with H. pylori completed treatment with omeprazole, 20 mg, or lansoprazole, 30 mg twice daily; clarithromycin, 200 mg 3 times daily; and amoxicillin, 500 mg 3 times daily, for 1 week. IL-1beta-511 and CYP2C19 genotypes of patients and sensitivity of H. pylori to clarithromycin and amoxicillin were determined. RESULTS: Logistic regression analysis showed that the IL-1beta-511 polymorphism, as well as CYP2C19 genotype of patients and clarithromycin-resistance of H. pylori, was associated with successful eradication. Eradication rates for H. pylori were 77.3% (75 of 97; 95% confidence interval, 67.5-84.6), 89.6% (147 of 164; 95% confidence interval, 83.9-93.1), and 94.7% (95% confidence interval, 86.9-98.5) in patients with the C/C, C/T, and T/T genotypes of IL-1beta-511, respectively (P = 0.0014). CONCLUSIONS: IL-1beta-511 polymorphism is one of the determinants of successful eradication of H. pylori using triple therapy with a PPI, amoxicillin, and clarithromycin, together with CYP2C19 genotype and bacterial resistance to clarithromycin.     

Clinical evaluation of four one-week triple therapy regimens in eradicating Helicobacter pylori infection

AIM: To evaluate clinical efficacy of four one-week triple therapies in eradicating Helicobacter pylori infection. METHODS: In this clinical trial, 132 patients with duodenal ulcer and chronic gastritis were randomly divided into four groups, and received treatment with OAC (omeprazole 20 mg + amoxicillin 1 000 mg + clarithromycin 250 mg), OFC (omeprazole 20 mg + furazolidone 100 mg + clarithromycin 250 mg), OFA (omeprazole 20 mg + furazolidone 100 mg + amoxicillin 1 000 mg) and OMC (omeprazole 20 mg + metronidazole 200 mg + clarithromycin 250 mg), respectively. Each drug was taken twice daily for one week. The (13)C urea breath test was carried out 4-8 weeks after treatment to determine the success of H pylori eradication. RESULTS: A total of 127 patients completed the treatment. The eradication rate for H pylori infection was 90.3%, 90.9%, 70.9% and 65.6%, respectively in OAC, OFC OMC and OFA groups. CONCLUSION: A high eradication rate can be achieved with one-week OAC or OFC triple therapy. Thus, one-week triple therapies with OAC and OFC are recommended for Chinese patients with duodenal ulcers and chronic gastritis.     

Comparative study of modified-release clarithromycin and immediate-release clarithromycin in the treatment of Helicobacter pylori-associated peptic ulcer disease

BACKGROUND/AIMS: Proton pump inhibitor-based triple therapy containing immediate-release clarithromycin is an important regimen for the eradication of Helicobacter pylori (H. pylori). However, the efficacy of modified-release clarithromycin for the treatment of H. pylori-associated peptic ulcer disease is still unknown. The aims of the study were to compare the efficacy of modified-release clarithromycin and immediate-release clarithromycin on the rates of ulcer healing and eradication of H. pylori. METHODOLOGY: One hundred and sixty-one patients with Helicobacter pylori-associated peptic ulcer were randomized to receive one-week triple therapy with either modified-release clarithromycin 1000mg once daily (AECMR) or immediate-release clarithromycin 500mg twice daily (AECIR) in combination with amoxicillin 1,000mg twice daily (A) and esomeprazole 40mg once daily (E). Post-treatment ulcer healing status and Helicobacter pylori status was determined by endoscopy and 13C urea-breath test at 16 weeks and 8 weeks after completion of triple therapy, respectively. RESULTS: Helicobacter pylori eradication rates were 87.5% and 87.7% for AECMR and AECIR, respectively, in the intent-to-treat analysis. Eradication rates in the per-protocol groups were 90.3% and 91.4% for AECMR and AECIR, respectively. In both the intent-to-treat and per-protocol analyses, the eradication rates were comparable in the AECMR and AECIR groups (p= 1.0 and 1.0, respectively). Ulcer healing rates in the intention-to-treat analysis were 81.3% and 77.8% for AECMR and AECIR, respectively. Ulcer healing rates in the per-protocol analysis were 90.3% and 90.0% for AECMR and AECIR groups, respectively. In both the intention-to-treat and per-protocol analyses, the ulcer healing rates were comparable in the AECMR and AECIR groups (p=0.645 and 0.584, respectively). CONCLUSIONS: Modified-release clarithromycin 1000mg once daily can be used as an alternative to immediate-release clarithromycin 500mg twice daily for the treatment of Helicobacter pylori-associated peptic ulcer disease.     

细胞色素P450 2C19基因多态性对以质子泵抑制剂为基础的三联疗法根除幽门螺杆菌疗效的影响

目的 研究以质子泵抑制剂(PPI)、左氧氟沙星、羟氨苄青霉素作为一线疗法对幽门螺杆菌(Hp)根除的影响,以及Hp根除率与CYP2C19基因多态性的相关性.方法 205例Hp阳性的患者被分为4组:埃索美拉唑20 mg 2次/d(E_(20)组),埃索美拉唑40 mg 2次/d(E_(40)组),雷贝拉唑10 mg 2次/d(R组),兰索拉唑30 mg 2次/d(L组),4组均加左氧氟沙星500 mg 1次/d和羟氨苄青霉素1000 mg 2次/d,疗程1周.其中有161例患者进行了CYP2C19基因型的检测,对Hp根除率分别按意愿治疗(intention-to-treat,ITT)分析和按方案(per protocol,PP)分析进行评估.结果 Hp总根除率为83.4%(PP)和79.0%(ITT).各组的根除率为:E_(20)组86.7%,E_(40)组88.5%,R组73.5%,L组78.1%.其中完成基因型检测的161例患者中,各基因型的根除率分别为:纯合子弱代谢型(PM)90%,杂合子强代谢型(HetEM)81.5%,纯合子强代谢型(HomEM)82.1%.CYP2C19各基因型间Hp根除率、各治疗方案间的根除率及各方案内各基因型间的根除率差异均无统计学意义(P>0.05).结论 以PPI为基础包含左氧氟沙星的三联疗法是目前根除Hp的有效方案,且该方案对Hp的根除率不受CYP2C19基因多态性的影响.     

Esomeprazole versus omeprazole for the eradication of Helicobacter pylori infection: results of a randomized controlled study

BACKGROUND: Esomeprazole has higher oral bioavailability and increased antimicrobial activity against Helicobacter pylori than omeprazole. GOALS: To compare 7 days esomeprazole with 7 days of omeprazole based triple therapies for the eradication of H. pylori, and to assess whether the administration of higher dose of esomeprazole leads to improved eradication rates. STUDY: One hundred and fifty-six dyspeptic patients with H. pylori received either: (1) 1-week treatment including esomeprazole 40 mg once daily, amoxicillin 1 g, and clarithromycin 500 mg, both twice daily (EAC1 group, n = 52); (2) 1-week treatment of omeprazole 20 mg, amoxicillin 1 g, and clarithromycin 500 mg, all administered twice daily (OAC group, n = 52); or (3) 1-week treatment with esomeprazole 40 mg, amoxicillin 1 g, and clarithromycin 500 mg, all given twice daily (EAC2 group, n = 52). RESULTS: H. pylori was eradicated in 37 of 52 patients in the OAC group (Intension to treat [ITT] 71%), and in 42 patients in the EAC1 group (ITT 81%). High eradication rate was achieved by the EAC2 regimen (ITT; 96%), but more patients reported unwanted effects. CONCLUSION: Seven days of esomeprazole based triple therapy is a satisfactory eradication regimen for H. pylori infection. Higher doses of esomeprazole have excellent eradication rates, but they may lead to increased side effects.     

Impact of clarithromycin resistance and CYP2C19 genetic polymorphism on treatment efficacy of Helicobacter pylori infection with lansoprazole- or rabeprazole-based triple therapy in Japan

OBJECTIVE: Helicobacter pylori treatment failure is thought to be due mainly to polymorphic cytochrome P450 2C19 (CPY2C19) genetic polymorphism, associated with proton pump inhibitor metabolism, and antimicrobial susceptibility. This report has ascertained which was more important, CPY2C19 polymorphism or antimicrobial susceptibility, when using 1-week lansoprazole-based or rabeprazole-based triple therapy in Japan. DESIGN: An open, randomized, parallel group study. SETTING: One hundred and forty-five subjects with H. pylori-positive gastritis or peptic ulcers were randomly assigned to receive 30 mg lansoprazole twice daily (LAC group), 10 mg rabeprazole twice daily (RAC20 group), or 20 mg rabeprazole twice daily (RAC40 group), with 1000 mg amoxicillin twice daily and 400 mg clarithromycin twice daily for 1 week. Antimicrobial resistance testing was performed by E-test. More than 4 weeks after completion of treatment, H. pylori status was assessed by 13C-urea breath test, histology, and culture. RESULTS: Cure rates expressed as intention-to-treat and per-protocol analyses, respectively, were 79.6 and 83.0% with LAC, 85.4 and 89.1% with RAC20, and 83.3 and 88.9% with RAC40. In the case of clarithromycin-sensitive strains, the cure rates were more than 97%, regardless of CPY2C19 polymorphism. However, treatment succeeded in only one out of 16 clarithromycin-resistant strains. CONCLUSIONS: The key to successful eradication of H. pylori, using lansoprazole or rabeprazole with clarithromycin and amoxicillin, is clarithromycin susceptibility, not CPY2C19 polymorphism.     

Recent success of pantoprazole -or lansoprazole- based clarithromycin plus amoxicillin treatment in the eradication of Helicobacter pylori.

BACKGROUND/AIMS: There are some reports showing that resistance of Helicobacter pylori (H. pylori) to clarithromycin has increased in recent years. We aimed to investigate the current success of a most popular first-line eradication regimen by using two different proton pump inhibitors: lansoprazole and pantoprazole. METHODS: Ninety patients with H. pylori-positive functional dyspepsia were randomized to receive pantoprazole 40 mg b.i.d. or lansoprazole 30 mg b.i.d. in addition to amoxicillin 1,000 mg and clarithromycin 500 mg twice daily for 14 days in a multicenter study. H. pylori infection was determined by histological examination and a rapid urease test. A follow-up endoscopy was performed to assess the H. pylori eradication six weeks after the end of therapy. RESULTS: Seventy-nine patients completed the study protocol properly. The H. pylori eradication rates according to per protocol analysis were 70% in group pantoprazole, amoxicillin and clarithromycin (28/40) and 69.2% in group pantoprazole, amoxicillin and clarithromycin (27/39). The eradication rates according to intention to treat analysis were 62.2% and 60% in lansoprazole, amoxicillin, clarithromycin, pantoprazole, amoxicillin, clarithromycin groups, respectively. The eradication rates were similar in both protocols (p>0.05). CONCLUSIONS: The most popular first-line eradication protocols of H. pylori achieved only a moderate success in the current study. Alternative therapy options are needed instead of clarithromycin-based triple treatment for eradication of H. pylori. The choice of proton pump inhibitor is not important in the eradication rate of H. pylori.     

Maastricht Ⅱ treatment scheme and efficacy of different proton pump inhibitors in eradicating Helicobacter pylori

AIM: The Maastricht Ⅱ criteria suggest the use of amoxicillin and clarithromycin in addition to a proton pump inhibitor over 7-10 d as a first line therapy in the eradication of Helicobacter pylori(H pylori). For each proton pump inhibitor, various rates of eradication have been reported. The present study was to compare the efficacy of different proton pump inhibitors like omeprazole, lansoprazole and pantoprazole in combination with amoxicillin and clarithromycin in the first line eradication of H pylori and to investigate the success of H pylori eradication in our district.METHODS: A total of 139 patients were included having a Helicobacter pylori(+) gastroduodenal disorders diagnosed by means of histology and urease test. Besides amoxicillin (1 000 mg twice a day) and clarithromycin (500 mg twice a day), they were randomized to take omeprazole (20 mg twice a day), or lansoprazole (30 mg twice a day), or pantoprozole (40 mg twice a day) for 14 d. Four weeks after the therapy, the eradication was assessed by means of histology and urease test. It was evaluated as eradicated if the H pylori was found negative in both. The complaints (pain in epigastrium, nocturnal pain, pyrosis and bloating)were graded in accordance with the Licert scale. The compliance of the patients was recorded.RESULTS: The eradication was found to be 40.8% in the omeprazole group, 43.5% in the lansoprazole group and 47.4% in the pantoprazole group. Sixty-three out of 139patients (45%) had eradication. No statistically significant difference was observed between the groups. Significant improvements were seen in terms of the impact on the symptom scores in each group.CONCLUSION: There was no difference between omeprazole, lansoprazole and pantoprazole in H pylori eradication, and the rate of eradication was as low as 45%.Symptoms were improved independent of the eradication in each treatment group. The iow eradication rates suggest that the antibiotic resistance or the genetic differences of the microorganism might be in effect. Further studies are required to verify these suggestions.