Clinical Study on the Safety and Efficacy of Local Injection of Human Cord Blood Mononuclear Cells in the Treatment of Refractory Diabetic Foot
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Number of patients with no adverse reactions.
研究概览
简要总结
Refractory diabetic foot is one of the most serious and costly chronic complications of diabetes. It is the leading cause of nontraumatic lower-extremity amputations while the conventional treatment is not effective. Therefore, new therapeutic methods are urgently needed. Cell therapy has shown unique advantages and potential in tissue regeneration and wound repair, and is considered as a new effective method to treat diabetic foot. Meanwhile, human cord blood-derived mononuclear cells (HCB-MNCs) with its sufficient sources, strong ability of proliferation and differentiation, and weak immunogenicity, is suitable for the treatment of diabetic foot. It is a prospective, single-arm, single-center clinical study to investigate the efficacy and safety of local injection of HCB-MNCs in the treatment of refractory diabetic foot.
详细描述
Refractory diabetic foot is one of the most serious and costly chronic complications of diabetes, and is the leading cause of nontraumatic lower-extremity amputations. Conventional treatment is symptomatic supportive treatment such as controlling blood sugar, fighting infection, improving blood circulation, using topical medications, etc. But the effectiveness is barely satisfactory, while the wound heals slowly, and the large blood vessels that have been blocked cannot be re-opened. Therefore, an effective method is needed to relieve lower limb ischemia, promote ulcer healing and shorten the treatment time.
Cell therapy has shown unique advantages and potential in tissue regeneration and wound repair, and is considered as a new effective method to treat diabetic foot. Cell treatment for diabetic foot include local injection, intravenous infusion and arterial infusion. At present, local intramuscular injection is used in most studies at home and abroad.
HCB-MNCs is composed of immature immune cells and pluripotent stem cells, which is adequate, superior proliferative and immature , is a favorable source of cells for the treatment of diabetic foot. A few clinical studies have found that local intramuscular injection of HCB-MNCs or combined with gel dressing can effectively treat diabetic foot ulcers and relieve pain and other symptoms of patients. In this study, 24 patients with refractory diabetic foot will be enrolled. HCB-MNCs will be injected into the diabetic foot wound area 3 times at a week interval to explore its effectiveness and safety.
The primary objective of this study is to investigate the safety of local application of HCB-MNCs in the treatment of refractory diabetic foot and the change of wound area. The secondary objective is to assess changes in the visual analogue scale, total symptoms score and wagner scale.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 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 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients aged 18-80 years;
- •Meet the diagnostic criteria of diabetic foot by International Clinical Guidelines for Diabetic Foot;
- •Ulcer course ≥8 weeks, Wagner grade ≥2;
- •There was no healing trend (no reduction in wound size and no obvious new granulation tissue) after 4 weeks or above treatment. Or the ulcer was further aggravated (by Wagner's grade assessment) in the course of standardized treatment;
- •Fasting blood glucose ≤9mmol/L, 2h postprandial blood glucose ≤13mmol/L;
- •Signing informed consent.
排除标准
- •Patients with a history of ketoacidosis and hyperosmosis within 6 months;
- •Patients with viral infection (treponema pallidum, active hepatitis, HIV, Epstein-Barr virus, etc.)
- •Patients with malignant disease or cured of basal cell carcinoma within the past 5 years;
- •Creatinine clearance < 45ml/min;
- •Patients with severe heart failure (NYHA III-IV);
- •Patients with a history of myocardial infarction or cerebral infarction in the last 3 months;
- •Patients who have received cell or growth factor therapy in the past year;
- •Patients during pregnancy or lactation;
- •Patients with abnormal thyroid dysfunction history or abnormal control through drug treatment;
- •Patients with severe hepatic failure (ALT, AST: above 3 times the upper limit of normal);
- •Lower extremity arterial with large artery occlusion by ultrasound image;
- •Patients with a history of severe coagulation disorder or hemorrhagic disease;
- •Patients with sequelae of cerebral infarction or other reasons that cannot extend their lower limbs flat;
- •Patients with psychological or mental disorders who cannot cooperate with treatment;
- •Participate in other clinical research within the past three months;
- •Patients are unable to complete the study or comply with the requirements of the study by investigator's judgment.
结局指标
主要结局
Number of patients with no adverse reactions.
时间窗: From baseline to 12 weeks after the first treatment. The follow-up period can be extended up to 24 weeks if the patient's foot ulcers have not healed at 12 weeks.
The patient completed 3 times HCB-MNCs treatment and follow-up, and there were no adverse reactions that needed to be stopped. Adverse reactions refer to any symptoms, syndromes or diseases that affect patients' health during clinical research and observation, and also include clinically relevant situations found in the laboratory or other diagnostic processes, such as unplanned diagnosis and treatment measures, withdrawal from research, or clinically significant laboratory examination items. Blood routine, fasting blood glucose, postprandial blood glucose, blood biochemistry, coagulation function, tumor markers and adverse reactions will be recorded during the follow-up.
Rate of wound area change
时间窗: From baseline to 12 weeks after the first treatment. The follow-up period can be extended up to 24 weeks if the patient's foot ulcers have not healed at 12 weeks.
The changes of ulcer wound area were compared weekly before and after local application of HCB-MNCs until the wound heals or the follow-up period ends or the wound area no longer changes. The formula for calculating the change rate of periwound is: Rate of wound area change=(Wound area per week after treatment-Area of wound before treatment)/ Area of wound before treatment×100
次要结局
- Change in visual analogue scale (VAS)(From baseline to 12 weeks after the first treatment. The follow-up period can be extended up to 24 weeks if the patient's foot ulcers have not healed at 12 weeks.)
- Change in total symptoms score (TSS)(From baseline to 12 weeks after the first treatment. The follow-up period can be extended up to 24 weeks if the patient's foot ulcers have not healed at 12 weeks.)
- Change in Wagner scale(From baseline to 12 weeks after the first treatment. The follow-up period can be extended up to 24 weeks if the patient's foot ulcers have not healed at 12 weeks.)