Improving Single Donor Success Rate in Clinical Islet Transplantation Using Alpha-1 Antitrypsin (Aralast NP)
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 5
- 试验地点
- 1
- 主要终点
- To demonstrate AAT efficacy in preventing non-immunologic loss of transplanted islet mass in a single-donor islet transplant.
研究概览
简要总结
Islet transplantation is a relatively new procedure used in people with difficult to control Type 1 diabetes. Insulin producing cells (islets) are isolated from a pancreas donated by the next of kin of a person who is brain dead. After the cells are prepared, the islets are transplanted into the recipient's liver and produce insulin. Patients who receive an islet transplant take medication that suppresses their immune system and prevent rejection of the islet tissue.
The investigators have also learned that there is general inflammation at the time of the transplant that is not fully controlled with our standard medications. The investigators believe this inflammation may cause some islet cell death around the time of transplant. Due to this islet death around the time of transplant, most recipients need 2 or 3 separate transplant procedures.
The investigators are studying the use of Alpha-1 Antitrypsin (AAT) in islet transplant to decrease the amount of cell death caused by general inflammation. In this study, the investigators hope to decrease the need for more than one transplant procedure by controlling inflammation, before and after transplant, with Alpha-1 Antitrypsin (Aralast NP).
Alpha-1 Antitrypsin is a protein made in healthy humans that helps to prevent tissue damage during times of inflammation. Alpha-1 Antitrypsin is obtained from healthy plasma donors. There have been studies in Islet Transplant in monkeys using this medication and it has shown to protect the islets from inflammation.
This study involves using Alpha-1 Antitrypsin in addition to our current Standard of Care medications used in Islet Transplant.
详细描述
METHODS & PROCEDURES:
This clinical trial will be a non-randomized, open-label, single arm, prospective trial to asses the efficacy of AAT in preventing non-immunologic loss of transplanted islet mass in a single-donor islet transplant. Enrolled patients (n=12) will participate in the study for 1 year, with outcomes assessed during islet isolation, 90 days post-transplant and at 1 year post-transplant.
The current Standard of Care treatment for Islet Transplant includes induction (Alemtuzumab/Basiliximab) and long-term immunosuppression (Prograf/Cellcept). The engraftment regimen includes anti-inflammatory medications (Etanercept/Anakinra) and intravenous insulin and heparin. We will utilize the current Islet Standard of Care Protocol. The only additional intervention used in this pilot trial is the addition of the investigational agent, alpha-1-antitrypsin to islet processing, culture, and patient treatment pre- and post-transplant.
Islet Dosage and Culture
Islets will be treated with AAT (to a final dilution of 0.5mg/mL) throughout the isolation and culture process. Islet treatment will include:
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 68 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •To be eligible the participant must have had Type 1 Diabetes Mellitus (T1DM) for more than 5 years, complicated by at least 1 of the following situations that persist despite intensive insulin management efforts:
- •Reduced awareness of hypoglycemia, as defined by the absence of adequate autonomic symptoms at plasma glucose levels < 3.0 mmol/L, indicated by, 1 or more episodes of severe hypoglycemia requiring third party assistance within 12 months, a Clarke score ≥4, HYPO score ≥1,000, lability index (LI) ≥400 or combined HYPO/LI >400/>
- •Metabolic instability, characterized by erratic blood glucose levels that interfere with daily activities and or 1 or more hospital visits for diabetic ketoacidosis over the last 12 months.
- •Participants must be capable of understanding the purpose and risks of the study and must sign a statement of informed consent.
排除标准
- •Hypersensitivity to Aralast NP, history of immunoglobulin A (IgA) deficiency, or assessed low IgA (< 0.70 g/L).
- •Severe co-existing cardiac disease, characterized by any one of these conditions: (a) recent (within the past 6months) myocardial infarction; (b) left ventricular ejection fraction <30%; or (c) evidence of ischemia on functional cardiac exam.
- •Active alcohol or substance abuse, to include cigarette smoking (must be abstinent for 6 months prior to listing for transplant).
- •Psychiatric disorder making the subject not a suitable candidate for transplantation, (e.g., schizophrenia, bipolar disorder, or major depression that is unstable or uncontrolled on current medication).
- •History of non-adherence to prescribed regimens.
- •Active infection including Hepatitis C, Hepatitis B, HIV, or tuberculosis (TB) (subjects with a positive purified protein derivative (PPD) performed within one year of enrollment, and no history of adequate chemoprophylaxis).
- •Any history of, or current malignancies except squamous or basal skin cancer.
- •BMI > 35 kg/m2 at screening visit.
- •Age less than 18 or greater than 68 years.
- •Measured glomerular filtration rate <60 mL/min/1.73 m
- •Presence or history of macroalbuminuria (>300 mg/g creatinine).
- •Clinical suspicion of nephritic (hematuria, active urinary sediment) or rapidly progressing renal impairment (e.g. Increase in serum creatinine of 25% within the last 3-6 months).
- •Baseline Hb < 105 g/L in women, or < 120 g/L in men.
- •Baseline screening liver function tests (LFT) outside of normal range, with the exception of uncomplicated Gilbert's Syndrome. An initial LFT panel with any values >1.5 times the upper limit of normal (ULN) will exclude a patient without a re-test; a re-test for any values between ULN and 1.5 times ULN should be made, and if the values remain elevated above normal limits, the patient will be excluded.
- •Untreated proliferative retinopathy.
- •Positive pregnancy test, intent for future pregnancy or male subjects' intent to procreate, failure to follow effective contraceptive measures, or presently breast-feeding.
- •Previous transplant or evidence of significant sensitization on panel reactive antibody (PRA) (at the discretion of the investigator).
- •Insulin requirement >1.0 U/kg/day
- •Hemoglobin A1c (HbA1c) >12%.
- •Uncontrolled hyperlipidemia [fasting LDL cholesterol > 3.4 mmol/L, treated or untreated; and/or fasting triglycerides > 2.3 mmol/L)].
- •Under treatment for a medical condition requiring chronic use of steroids.
- •Use of coumadin or other anticoagulant therapy (except aspirin) or subject with prothrombin time / international normalized ratio (PT/INR) > 1.
- •Untreated Celiac disease.
- •Patients with Graves disease will be excluded unless previously adequately treated with radioiodine ablative therapy.
研究组 & 干预措施
AAT treated group
Study subjects will receive Alpha-1 Antitrypsin (AAT) study drug intravenously in 4 doses over 15 days around the time of their transplant. The islets will also be prepared in a solution of AAT.
干预措施: Alpha-1 Antitrypsin (Drug)
结局指标
主要结局
To demonstrate AAT efficacy in preventing non-immunologic loss of transplanted islet mass in a single-donor islet transplant.
时间窗: Day 90 post-transplant
Insulin independence at day 90 post-transplant (initial, single-donor transplant)
次要结局
- To demonstrate safety of AAT during islet isolation and culture(Day -1 pre-transplant)
- To demonstrate efficacy of AAT to improve islet isolation quantity and quality(Day -1 pre-transplant)
- To demonstrate safety of AAT in islet transplantation.(Year 1 post-transplant)
- To demonstrate AAT efficacy in the prevention of long-term metabolic burn-out.(Year 1 post-transplant)