Changes in Blood Flow and Angiogenesis Induced in the Elderly by Hyperbaric Oxygen Therapy
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 62
- 试验地点
- 2
- 主要终点
- Change from baseline of general cognitive functions index at 3 and 6 months
研究概览
简要总结
Recent studies show preliminary evidence of HBOT therapeutic effects on angiogenesis, increased tissue blood flow and oxygenation correlated with tissue function.
Our primary hypothesis is that HBOT will have beneficial effects on the above mentioned organs associated with aging-related malfunctions due to restored mitochondrial function, mobilization of stem cells and induction of angiogenesis.
详细描述
The paradigm The accumulation of damage to molecules, cells and tissues over a lifetime that contributes to aging eventually leads to frailty and malfunction. The past decade has seen fundamental advances in our understanding of the aging process and raised optimism that interventions to slow ageing may be on the horizon. The aging process is linked to energy deficit due to tissue hypoxia and mitochondria dysfunction.
- Mitochondria dysfunction- Mitochondria are the primary generator of energy by means of ATP synthesis and their dysfunction leads to cellular function decline and degenerative changes. In addition, mitochondria dysfunction in stem cells decreases the capabilities for tissue regeneration.
- Tissue hypoxia- Atherosclerosis is a chronic inflammatory response that damages arterial blood vessels. It begins in childhood and progresses throughout life. A vicious cycle occurs as mitochondrial dysfunction accelerates atherosclerosis and the waning of microvasculature, resulting in decrease blood supply and ensuing relative tissue hypoxia. The decrease oxygen supply to the mitochondria further exacerbates mitochondrial dysfunction.
Hyperbaric oxygen can increase the partial pressure of dissolved (non-hemoglobin-bound) oxygen 20-30 fold and produce two main effects. First, it can eliminate the relative tissue hypoxia induced by atherosclerosis. Second, because mitochondria function is directly influenced by the partial pressure of dissolved oxygen, hyperbaric oxygen can amend mitochondrial dysfunction. Thus, the investigators suggest hyperbaric oxygen as a novel method for breaking the vicious cycle of degeneration and perhaps even for reversing the aging process.
The study is designed as a prospective crossover study aiming to evaluate the therapeutic effects of HBOT on the Brain, Cardiovascular and Immune system, Skin, Erectile (sexual functions), liver and Kidneys, of aging population.
After signing an informed consent form, patients will be invited for baseline evaluations. All patients would be evaluated 3 times - at baseline, after 3 months of follow up, and after additional 3 months of HBOT protocol. The evaluation will include cognitive assessment, questionnaires, MRI scans, blood tests and skin photograph and biopsy. In addition, blood tests will be drawn before and after the 20th, 40th and the 60th sessions for stem cells and mitochondria tests.
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
- None
入排标准
- 年龄范围
- 65 Years 至 —（Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age≥ 65 years
- •Capability to sign informed consent.
- •No cardiac or cerebrovascular ischemia previous events one year prior to inclusion.
排除标准
- •Previous treatment with HBOT for any other reason during the last 3 months prior to inclusion.
- •Any history of malignancy during the last year prior to inclusion.
- •Severe cognitive decline (MMSA<17)
- •Severe chronic renal failure (GFR <30)
- •Uncontrolled diabetes mellitus (HbA1C>8, fasting glucose>200)
- •Immunosuppressant from any reason
- •Contraindications to perform MRI: claustrophobia, allergy to gadolinium, foreign bodies, pacemaker, etc.
- •Active Smoking.
- •Pulmonary diseases such as severe emphysema, moderate-severe obstructive disease.
- •Medical conditions deemed by the investigator to make the patient ineligible for protocol investigations.
研究组 & 干预措施
Treatment
Hyperbaric Oxygen Therapy: 3 months of treatment consisting of 60 daily sessions, 90 minutes of 100% oxygen at pressure of 2 ATA each, five days a week
干预措施: Hyperbaric Oxygen Therapy (Device)
Control/Crossover
Hyperbaric Oxygen Therapy: 3 months control period (no treatment) followed by 3 months of treatment consisting of 60 daily sessions, 90 minutes of 100% oxygen at pressure of 2 ATA each, five days a week
干预措施: Hyperbaric Oxygen Therapy (Device)
结局指标
主要结局
Change from baseline of general cognitive functions index at 3 and 6 months
时间窗: at baseline, 3 and 6 months
Patients' cognitive functions will be assessed by Neurotrax computerized cognitive tests to generate the general cognitive index
Change from baseline of Angiogenesis in brain MRI at 3 and 6 months
时间窗: at baseline, 3 and 6 months
imaging will be performed for evaluation of brain changes and angiogenesis processs using MRI perfusion (DSC)
Change from baseline of exercise VO2 MAX at 3 and 6 months
时间窗: at baseline, 3 and 6 months
Using a standard exercise test which includes gas analysis, the change in VO2 maxs will be assessed 3 and 6 months compared to baseline
次要结局
- Change in number of circulating stem cells (CD34) at 3 and 6 months(at baseline, 3 and 6 months)
- Change from baseline in quality of life measured by SF-36 form at 3 and 6 months(at baseline, 3 and 6 months)
- Change from baseline of proteinuria at 3 and 6 months(at baseline, 3 and 6 months)
- Change from baseline of Methacetin breath test at 3 and 6 months(at baseline, 3 and 6 months)
- Change from baseline in bone density at 3 and 6 months(at baseline, 3 and 6 months)
研究者
Shay Efrati
MD
Assaf-Harofeh Medical Center