Treatment of Low-Grade Gastric Non-Hodgkin's Lymphoma of Mucosa-Associated Lymphoid Tissue (MALT) Type Stages IE & II1E (HELYX-Study)
试验速览
- 阶段
- 3 期
- 入组人数
- 200
- 试验地点
- 6
- 主要终点
- remission status after eradication therapy 3-monthly
研究概览
简要总结
The first objective of this study is to confirm the results of complete remission of low-grade gastric MALT lymphoma stage IE & II1E after H. pylori eradication on a larger number of patients (HELYX Part I). If there is no response to the antibiotic therapy, the role of radiotherapy on the course of gastric MALT lymphoma will be investigated as a consecutive therapeutic option for patients that are H. pylori- negative, t(11;18)-positive or failure candidates after eradication therapy. Furthermore, the method of radiation, and the radiation dose will be investigated and standardized. HELYX PART II is therefore a randomized equivalent study comparing the standard dose of 36Gy vs. a reduced dose of 25.2Gy locoregional. Additional molecular genetic analysis will be performed to try to understand pathogenetic mechanisms of lymphomagenesis.
详细描述
Experimental data have extended the knowledge of the mere association of gastric MALT lymphoma and infection with Helicobacter pylori. If we summarise the reports to date on the results of treatment of gastric low-grade MALT lymphoma in an early clinical stage (EI) by H. pylori eradication we find a complete remission figure of 77% in more than 200 patients.
As a therapy with less side effects than radiation, surgery or chemotherapy and as a stomach-conserving treatment, eradication of H. pylori in patients with low-grade gastric MALT lymphoma in stages IE & II1E should be the treatment of the choice within clinical trials since there are no long-term results available thus far. Besides, pretreatment patient selection and careful follow-up with endoscopy, biopsies and clinical staging including endoscopic ultrasonography is necessary. However, a five to ten year-follow-up will be necessary before the definitive value of Helicobacter pylori eradication can be established. Furthermore, since not all patients respond to this therapy research into the pathogenetic mechanisms of lymphomagenesis is inevitable.
Approximately 20% of patients with antigen-positive, primary gastric low-grade MALT lymphoma in stage I will not respond to eradication therapy. Hence, a consecutive salvage therapy other than surgery is much needed. The aim of the second part of this study is to establish radiation therapy as a salvage therapy. Furthermore, the effect of a reduced radiation dose (25.2Gy) compared to the standard dose (36Gy) will be investigated with the aim of non-inferiority of both doses.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •histologically diagnosed, primary gastric low-grade B-cell MALT lymphoma stages IE or II1E, Helicobacter pylori-positive (in histology, urease test , and serology) for inclusion into HELYX part I
- •histologically diagnosed, primary gastric low-grade B-cell MALT lymphoma stages IE or II1E, Helicobacter pylori-negative (in histology, urease test, and serology) for inclusion into HELYX part II
- •patients who achieved a study end point of HELYX I: partial remission or no change 12 months after successful antibiotic therapy for inclusion into HELYX part II,
- •age > 18 and < 75 years
- •Karnofsky-Index > 60%
- •sufficient liver function, defined as bilirubin < 34µmol/l
- •sufficient renal function, defined as creatinine < 133µmol/l
- •written informed consent
- •complete clinical tumor staging
排除标准
- •primary gastric low-grade MALT lymphoma, stages >II1E or gastric high-grade lymphoma or other lymphoma entities of the stomach e.g. lymphoblastic lymphoma or Burkitt's lymphoma
- •age < 18 and > 75 years
- •Karnofsky-Index < 60%
- •insufficient liver and renal function (see above)
- •HIV-infection
- •pregnancy or nursing
结局指标
主要结局
remission status after eradication therapy 3-monthly
continuous complete remission (CCR) during follow-up
remission status after radiation therapy (36 Gy vs 25.2 Gy)
continuous complete remission after radiation therapy during follow-up
次要结局
- endoscopic controls every 3 months during the first year
- endoscopic controls twice yearly in the second year after CR
- complete tumor staging once yearly
- relapse after therapy after each intervention