Soy-rich Diet for Preventing Chronic Pain After Breast Cancer Surgery
试验速览
- 阶段
- 2 期
- 状态
- 终止
- 发起方
- 入组人数
- 6
- 试验地点
- 4
- 主要终点
- Number of women in both arms with any pain of any type in operated breast or its vicinity
研究概览
简要总结
The incidence of chronic pain after breast cancer surgery (CPBCS) is high in women diagnosed with breast cancer. Similar to other chronic postoperative pain conditions, existing treatments for CPBCS do not always work. Adopting the concept of using pain relieving measures prior to surgery rather than after it, may lead to decreased postoperative pain levels. Soy has been shown to have pain-relieving properties and may reduce the risk for developing chronic post-surgical pain. The purpose of this study is to determine the effects of adding soy protein to the diet before surgery on the development of chronic pain.
详细描述
Preclinical studies indicate that soy consumption suppresses the development of pain behavior and hyperalgesia following nerve injury. The pain-suppressing properties of soy protein have been shown to be predominately the result of soy pre-operative consumption.
This is a randomized, double blind, placebo-controlled clinical trial for women diagnosed with breast cancer and scheduled to undergo breast cancer surgery. The trial will comprise two phases: 1. A 2-week preoperative dietary manipulation phase, and 2. A one-year postoperative follow up period. In the first phase eligible candidates will undergo a basic dietary evaluation followed by stratification into 4 study groups, based on their pre-vs. postmenopausal status and the planned type of surgery, i.e., formal mastectomy vs. breast-conserving surgery. Women in each group will be randomized to receive either powdered soy protein in the experimental group or milk protein in the control group. During the second, post-surgical phase women will resume their normal diet. If shown to be beneficial, this simple dietary manipulation may prevent one of the most severe sequelae of breast cancer.
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
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 21 Years 至 99 Years（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Women diagnosed with breast cancer and scheduled for elective breast cancer surgery (excluding breast biopsy) with axillary lymph node dissection (total and/or sentinel node excision).
- •Women who are 21 years or older.
排除标准
- •History of significant heart, gastro-intestinal, liver or kidney disease.
- •Use of the anticoagulant, warfarin or Coumadin.
- •Malabsorption of any kind.
- •Diagnosed lactase deficiency.
- •Known allergy to any of the tested dietary products.
- •Basic daily consumption of soy protein in quantities exceeding 10 g/day.
- •Women who are strict vegetarians (i.e. no animal derived dietary sources).
- •The use of the following narcotics or adjuvant pharmacotherapy: opioids, anticonvulsants, antidepressants and steroids (except antidepressant use specifically for depression).
- •Tumour size (if known) > 3cm(i.e. size before pre-operative chemotherapy, if administered).
- •Locally advanced breast cancer.
- •Inflammatory breast cancer.
- •Paget's disease of the breast with palpable mass.
- •Suspected metastasis.
- •Suspected micrometastasis.
- •Previous breast surgery of any kind (except needle biopsy).
- •The need for bilateral breast surgery.
- •The existence of other known cancer, including metastasis, either in the other breast or elsewhere.
- •Previous or current endocrine cancer therapy (e.g. selective estrogen receptor modulators, aromatase inhibitor).
- •Body mass index (BMI) > 35.
研究组 & 干预措施
Soy protein
干预措施: Isolated soy protein (Dietary Supplement)
Milk protein
干预措施: Isolated milk protein (Dietary Supplement)
结局指标
主要结局
Number of women in both arms with any pain of any type in operated breast or its vicinity
时间窗: 12 months post-surgery
次要结局
- Anxiety and Depression(Up to 12 months post-surgery)
- Pain intensity (acute)(Up to 7 days post-surgery)
- Pain intensity (chronic)(Up to 12 months post-surgery)
- Analgesic medication use(Up to 12 months post-surgery)
- Pain quality(Up to 12 months post-surgery)
- Disability(Up to 12 months post-surgery)
- Adverse events(Up to 12 months post-surgery)
- Childhood and adolescence consumption of soy(Baseline)
- Adverse events(2 weeks during dietary supplementation)
研究者
Dr. Yoram Shir
Doctor
McGill University Health Centre/Research Institute of the McGill University Health Centre