Pomalidomide for the Treatment of Bleeding in Hereditary Hemorrhagic Telangiectasia After Trial Longitudinal Assessment Study (PATH-HHT ATLAS)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 62
- 试验地点
- 22
- 主要终点
- Epistaxis Severity Score
研究概览
简要总结
This is a multicenter U.S. longitudinal study evaluating patients with hereditary hemorrhagic telangiectasia who participated in the PATH-HHT clinical trial of pomalidomide for the treatment of HHT. This study is a longitudinal assessment of safety and effectiveness of pomalidomide in HHT in clinical trial participants following completion of the double-blind, placebo-controlled study.
详细描述
Hereditary Hemorrhagic Telangiectasia (HHT) is an autosomal dominant condition characterized by disordered angiogenesis that affects 1 in 5,000 people. It results in numerous clinical complications including severe recurrent epistaxis, gastrointestinal bleeding, chronic iron deficiency anemia (and possible transfusion dependence), high-output cardiac failure, and many others. In recognition that elevated levels of vascular endothelial growth factor (VEGF) are elevated in HHT, anti-angiogenic drugs are now being used to treat HHT off-label to manage HHT-associated bleeding. A primary agent used for this purpose is pomalidomide, an oral immunomodulatory drug with antiangiogenic properties. Pomalidomide was demonstrated to be efficacious over a 6-month treatment period in the multicenter U.S. randomized controlled PATH-HHT Study. The present study is the successor to PATH-HHT, the PATH-HHT ATLAS (After Trial Longitudinal Assessment Study). This study will evaluate the long-term impact of pomalidomide on epistaxis (as measured by the validated ESS, epistaxis severity score), gastrointestinal bleeding, and iron deficiency anemia (as assessed by hemoglobin measurements, red blood cell transfusions, and intravenous iron infusions).
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •A clinical diagnosis of HHT as defined by the Curacao criteria
- •Age > 18 years
- •Platelet count ≥ 100 x 109/L prior to pomalidomide initiation
- •WBC ≥ 2.5 x 109/L prior to pomalidomide initiation
- •INR ≤ 1.4 and normal ± 2 sec activated partial thromboplastin time (aPTT) by local laboratory criteria (except for patients on a stable dose of warfarin or direct oral anticoagulants)
- •Epistaxis severity score ≥ 3 measured over the preceding month
- •A requirement for anemia, as determined by local laboratory normal ranges, and/or parenteral infusion of at least 250 mg of iron or transfusion of 1 unit of blood over the 24 weeks preceding the screening visit
- •All study participants must agree to be registered into the FDA mandated POMALYST REMS program, and be willing and able to comply with the requirements of the POMALYST REMS program
- •Females of childbearing potential (FCBP)† must adhere to the pregnancy testing schedule mandated by the POMALYST REMS program
- •Prior enrollment on PATH-HHT study (NCT03910244)
- •A female of childbearing potential is a sexually mature woman who: 1) has not undergone a hysterectomy or bilateral oophorectomy; or 2) has not been naturally postmenopausal for at least 24 consecutive months (i.e., has had menses at any time in the preceding 24 consecutive months).
排除标准
- •Women currently breast feeding or pregnant
- •Renal insufficiency, serum creatinine > 2.0 mg/dl
- •Hepatic insufficiency, bilirubin > 2.0 (or >4.0 in the setting of a prior clinical or genetic diagnosis of Gilbert's syndrome) or transaminases > 3.0x normal
- •Prior treatment with thalidomide or other non-pomalidomide immunomodulatory imide drugs (IMiDs) within previous 6 months
- •Prior treatment with bevacizumab (systemic or nasal) within previous 6 weeks
- •Prior treatment with pazopanib within previous 6 weeks
- •The use of octreotide or estrogens within the previous month
- •History of prior unprovoked thromboembolism confirmed by venous ultrasound or other imaging modalities
- •Known peripheral neuropathy, confirmed by neurologic consultation
- •Known underlying hypoproliferative anemia (i.e. myelodysplasia, aplastic anemia)
- •Currently enrolled in other drug trials
- •Known hypersensitivity to thalidomide or lenalidomide
- •The development of erythema nodosum if characterized by a desquamating rash while taking thalidomide or similar drugs
- •Known SMAD-4 mutation, unless there has been a colonoscopy with normal (negative) results, or in which the patient has had no more than 5 small (in the opinion of the gastroenterologist) colonic polyps completely removed within the preceding 18 months
- •Anything that in the investigator's opinion is likely to interfere with completion of the study
结局指标
主要结局
Epistaxis Severity Score
时间窗: 12 months
Validated bleeding scale in HHT scored between 0-10, higher scores indicate worse bleeding
次要结局
- Serum hemoglobin (g/dL)(12 months)
- Hematologic Support Score(12 months)
- Intravenous iron infusion (mg elemental iron)(12 months)
- Red cell transfusion (units of packed red blood cells)(12 months)
- Incidence of treatment-emergent adverse events (safety)(12 months)
研究者
Hanny Al-Samkari, MD
Classical Hematologist, Clinical Investigator
Massachusetts General Hospital