Angiotensin-II Receptor Antibody Blockade With Losartan in Patients With Lupus Nephritis
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Carotid intima-media thickness change after 12 months of the intervention
研究概览
简要总结
Antibodies directed against angiotensin-II receptor (AT1-Ab) are agonist antibodies previously studied in human diseases such as preeclampsia, transplantation and scleroderma. They act by binding to the AT1 receptor and their effects can be blocked with the use of angiotensin receptor blockers (ARB). In this randomized open clinical trial the investigators will study the effect of the blockade of AT1-Ab with losartan in carotid intima-media thickness progression in patients with lupus nephritis compared to patients treated with enalapril.
详细描述
Angiotensin-II type 1 receptor antibodies (AT1R-Ab) are agonist antibodies directed against the second loop of the AT1 receptor. These antibodies have been studied in human diseases such as preeclampsia, transplantation and scleroderma. A previous study from the investigators' group found an elevated prevalence of AT1R-Ab in patients with lupus nephritis. As these antibodies have been linked to atherosclerosis development this open randomized clinical trial was designed to evaluate the effect of AT1R-Ab blockade with losartan compared to the use of enalapril in the progression of carotid intima-media thickness (CIMT) in patients with active lupus nephritis.
Biopsy-proven lupus nephritis patients who tested positive for AT1R-Ab will be performed a CIMT measurement by Doppler ultrasound at the time of the biopsy and then at 12-months follow up.
The primary outcome will be the change in the CIMT in the course of 12 months in both groups.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 16 Years 至 50 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Signed consent form for the study
- •Biopsy-proven lupus nephritis with proteinuria > 1.5g/g by 24 hour urine protein to creatinine ratio
- •Need for immunosuppressive induction to remission therapy according to the treatment physician
- •Systemic lupus erythematosus diagnosis based on at least 4 American College of Rheumatology criteria
- •Age between 16 and 50 years
排除标准
- •Patient does not want to participate in the study
- •Comorbid disease such as diabetes mellitus with macro/microangiopathy, previous diagnosis of hypertension >5 years, scleroderma
- •Comorbid findings in the histopathological analysis of the renal biopsy
研究组 & 干预措施
Losartan
AT1R-ab effect can be blocked with the use of angiotensin-II receptor blockers. The participants will receive losartan.
干预措施: Losartan (Drug)
Enalapril
Angiotensin converting enzyme inhibitors are indicated in the management of active lupus nephritis but do not block the effect of AT1R-Ab.
干预措施: Enalapril (Drug)
结局指标
主要结局
Carotid intima-media thickness change after 12 months of the intervention
时间窗: 12 months
Change in carotid intima-media thickness from baseline thickness at study entry to 12 months of follow up measured by Doppler ultrasound
次要结局
- Response to treatment(12 months)
- Arterial pressure(12months)
研究者
Luis Eduardo Morales Buenrostro
Clinical Professor of Nephrology
Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran