Fish Oil for HIV-Related Inflamm-aging and Immune Senescence
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 37
- 试验地点
- 2
- 主要终点
- Change in Markers of Immune Senescence Between Baseline Values and Values After 12 Weeks of Supplementation
研究概览
简要总结
HIV infection is associated with premature aging of the immune system. It is believe that the persistent inflammation that accompanies HIV infection is a major contributor to premature immune aging. Fish oil has well-documented anti-inflammatory properties. In this randomized, clinical trial, we're testing whether a 12-week course of fish oil supplementation will reverse premature aging in HIV-infected older adults.
详细描述
Due to treatment advances, the number of persons > 50 years old who are living with HIV/AIDS in the United States (US) has steadily increased. African Americans (AA) represent a disproportionate number of HIV/AIDS cases in this age group, with infection rates 12 times higher than among whites (51.7 per 100,000 compared to 4.2 per 100,000). Limited data suggest that older HIV+ AA are characterized by health status disparities. One cohort study of older, largely minority HIV+ persons (N=121, AA=83%;mean age=54), found that 34% had metabolic syndrome and 50% had a Framingham Cardiac Risk score > 10%. HIV+ older adults of all races show a premature onset of other age-associated co-morbidities, such as osteoporosis, non-AIDS malignancies, and cardiovascular disease (CVD). These co-morbidities have been linked to persistent inflammation and persistently elevated serum levels of proinflammatory cytokines that mimic an aging phenotype known as "inflamm-aging." In both middle-aged HIV+ persons and older HIV seronegative adults, inflamm-aging is associated with more limited T cell repertoires and increased risk for morbidities and mortality. In HIV infection, inflamm-aging is postulated to be maintained (a) by the constant antigen burden imposed by HIV and other chronic viral co-pathogens, such as cytomegalovirus (CMV), and (b) by HIV-induced disruption of intestinal epithelial integrity with subsequent translocation of gut microflora into the systemic circulation. Our hypothesis is that inflamm-aging is responsible for the premature immune senescence associated with HIV infection in aging individuals. Immune senescence, characterized by diminished replicative capacity, has been observed in middle-aged persons treated with highly active antiretroviral therapy (HAART) who achieve immune reconstitution and undetectable viral loads. Senescent cells are characterized by the absence of the surface marker CD28, and in advanced senescence express CD57 (CD28-/CD57+ phenotype). Because premature senescence leads to loss of anti-HIV cell-mediated immune responses and accelerated HIV disease progression,there is an urgent need to test new treatment strategies to reduce inflamm-aging and subsequent immune senescence.
Fish oil may be an effective treatment option for reducing HIV-related inflamm-aging. Cold water fish are rich in the omega-3 highly unsaturated fatty acids (HUFA) eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which have anti-inflammatory effects. When consumed as fish or fish oil supplements, EPA and DHA replace arachidonic acid in cell membranes and inhibit the synthesis of proinflammatory arachidonic acid metabolites, such as prostaglandins and leukotrienes. Moreover, animal and in vitro studies have shown that EPA and DHA stimulate regeneration of intestinal mucosa damaged by methotrexate,16 IL-4, and experimental ulcerative colitis. Yet, to date, no studies have been conducted on the effects of fish oil for reducing HIV-related inflamm-aging and reversing immune senescence.
The purpose of this study is to explore the safety and estimate the effect size of fish oil to modulate parameters of inflamm-aging and immune senescence in HIV+ older adults. Participants will receive either 1.6 grams of omega-3 fatty acids (800 mg of EPA, 600 mg DHA, 200 mg other omega-3 fatty acids) or placebo for 12 weeks. We expect to find a reduction in inflammatory markers and the percentage of CD8+ and CD4+ T lymphocytes that exhibit a senescent phenotype in the fish oil condition, but not in the control condition, at 12 weeks. We expect to find no difference between the conditions on the safety parameters at 4 and 12 weeks.
The specific aims are:
Aim 1. To assess the safety of the fish oil condition by comparing it to the control condition at 4 and 12 weeks, controlling for covariates (demographics, lifestyle, medications including HAART, fish oil supplement adherence, intercurrent illnesses), on
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Double (Participant, Investigator)
盲法说明
All gelcaps were overencapsulated to mask their contents
入排标准
- 年龄范围
- 40 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •documented HIV infection
- •between 40 and 70 years of age
- •clinically stable HIV disease as evidenced by a CD4+ T lymphocyte count of > 250 cells/mm3
- •platelet count between 150,000 and 400,000 cells/mm3 to reduce bleeding risks associated with omega 3-fatty acids
- •treatment with a stable HAART regimen for at least six months prior to study entry
- •plasma HIV RNA < 75 copies/ml for at least 12 months
- •elevated plasma concentration of hsCRP (> 2.0 mg/L).
排除标准
- •use within the past month of drugs (e.g., statins, steroids, hormones) and supplements (e.g., omega-3 fatty acids, glucosamine/chondroitin) that have anti-inflammatory effects (excluding non-regular use of aspirin or NSAIDS), or medications or supplements that affect bleeding (e.g., heparin, warfarin, clopidogrel, garlic, ginseng)
- •allergy to fish or shellfish
- •chronic inflammatory condition (e.g., asthma, rheumatoid arthritis), opportunistic infection or cancer, renal impairment (serum creatinine > 2.0 mg/dL), thrombocytopenia (platelet count < 150,000/mm3), bleeding episodes (e.g., gum bleeding, nosebleeds), or a metabolic condition (e.g., diabetes mellitus, thyroid disease)
- •body mass index of > 35, since obesity is associated with inflammation
- •impaired liver function as evidenced by liver enzyme elevations > three times the upper limit of normal (AST or ALT > 150 IU/L)
- •history of prostate cancer
- •LDL cholesterol level > 120 mg/dL
- •lifestyle exclusion factors include use of illicit drugs and consumption of > 3 alcoholic drinks/day
研究组 & 干预措施
Fish Oil
Participants will receive fish oil gelcaps that contain 1.6 grams of omega-3 fatty acids (800 mg of EPA, 600 mg DHA, 200 mg other omega-3 fatty acids) for 12 weeks.
干预措施: Fish oil that contains omega-3 fatty acids (Dietary Supplement)
Placebo
Participants will receive 1 gram of oleic sunflower oil for 12 weeks.
干预措施: Placebo (Dietary Supplement)
结局指标
主要结局
Change in Markers of Immune Senescence Between Baseline Values and Values After 12 Weeks of Supplementation
时间窗: End of 12-Week Supplementation Period
Markers of immune senescence will include change in the expression of the senescence markers CD28 and CD57 on the surface of peripheral CD4+ and CD8+ T lymphocytes. We will measure the percentage of CD4+ and CD8+ T lymphocytes that are CD28-/CD57- or CD28-/CD57+. We will subtract the percentage obtained at Week 12 from the baseline percentage to calculate the change scores.
次要结局
未报告次要终点