Comprehensive Evaluation of Prolapse Meshes by an Interdisciplinary Research Team

跨学科研究团队对脱垂网片的综合评估

• 批准号: 8078147
• 负责人: Pamela A. Moalli
• 金额: $ 45.59万
• 依托单位: MAGEE-WOMEN'S RES INST AND FOUNDATION
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8078147
• 关键词: Abdomen; Abdominal Surgical Procedures; Acute; Address; Adrenergic Antagonists; Adult; Age; Agonist; Anatomy; Applications Grants; Autologous; Behavior; Biochemical; Biocompatible Materials; Biological; Biological Assay; Biomechanics; Biomedical Engineering; Bladder; Chronic; Clinical; Clinical Data; Collagen; Connective Tissue; Data; Deterioration; Development; Dyspareunia; Elasticity; Elastin; Estrogens; Evaluation; Extracellular Matrix; Failure; Foundations; Funding Mechanisms; Future; Goals; Gold; Grant; Health; Human; Hysterectomy; Immune response; Implant; Incidence; Infection; Inferior; Institutes; Institution; Integration Host Factors; Interdisciplinary Study; Lead; Length; Maintenance; Marketing; Mechanics; Mentors; Methods; Modeling; Morbidity - disease rate; Muscarinics; Muscle function; Occupations; Operative Surgical Procedures; Organ; Outcome; Pain; Patients; Pelvis; Phase; Physiological; Plague; Polypropylenes; Procedures; Process; Progesterone; Property; Protocols documentation; Ptosis; Public Health; Recommendation; Relative (related person); Reproductive Physiology; Scientist; Sheep; Smooth Muscle; Structure; Surgeon; Surgical incisions; Techniques; Tensile Strength; Testing; Textiles; Tissues; Transplanted tissue; Vagina; Vaginal Discharge; Vaginal Prolapses; Vaginal delivery procedure; Vendor; Woman; Women' s Health; Wound Healing; base; experience; falls; graduate student; implantation; improved; in vivo; mechanical behavior; multidisciplinary; nerve supply; next generation; nonhuman primate; public health relevance; rectal; regenerative; repaired; response; scaffold; soft tissue; success; tissue regeneration

DESCRIPTION (provided by applicant): Each year roughly 200,000 U.S. women undergo a surgery to repair pelvic organ prolapse (6, 7). Biologic and synthetic meshes are widely used in prolapse repairs to improve anatomical outcomes over native tissue repairs which currently have a failure rate of over 30%. To date, however, there is little scientific data to guide surgeons in the selection of a particular product. As a result, meshes are used based on the recommendations of a local vendor and consequently, are placed in women on a trial and error basis. There is growing evidence, however, that the complications associated with prolapse meshes cause unacceptably high rates of morbidity including infection, mesh shrinkage, mesh erosion, mesh exposure, pelvic, rectal and bladder pain and dyspareunia. Such complications have become significant enough for the FDA to recently release a warning about mesh use, especially when it is placed transvaginally. In this proposal, we therefore, aim to establish an interdisciplinary team of scientists dedicated to the comprehensive testing of previously or newly marketed prolapse meshes and for the development of the next generation of graft materials based on specific scientific criteria. In the first phase of the study, we determine how biochemical and structural changes in the prolapsed vagina impact passive and active mechanical behavior so as to develop a mesh in which these deficiencies are repaired or compensated for, allowing us to restore the prolapsed vagina to the nonprolapsed condition. In the second phase, we hypothesize that the shortcoming of current prolapse meshes is that they are too stiff. While this results in a repair with increased tensile strength, it occurs at the expense of tissue function with accelerated tissue contraction, decreased elasticity and compliance, and deterioration of smooth muscle function. To test our hypothesis, we implant commonly used synthetic prolapse meshes into the vagina of nonhuman primates with prolapse using the gold standard surgical procedure (the abdominal sacrocolpopexy) and then define the cellular, biochemical and biomechanical impact on the vagina at 6 months post implantation. Eventually, we will implant meshes transvaginally to characterize the distinct host response to this surgical approach. In the third phase, we explore the development of future grafts for prolapse surgery. We hypothesize that because of its bioinductive effects, a combined biologic/synthetic mesh will be superior to a synthetic mesh alone in restoring vaginal structure and function. We propose that a key yet poorly developed component of prolapse repairs is the re-establishment of smooth muscle reactivity and therefore, test the use of a temporary biologically active scaffold in achieving this process. In this way, this grant proposal provides a mechanism to establish the first team of scientists dedicated to the comprehensive unbiased evaluation of prolapse meshes as a means of educating both current and future prolapse surgeons, and the public regarding potential problems associated with certain materials. Indeed, the development of such a group is imperative for protecting the health of women. PUBLIC HEALTH RELEVANCE: Prolapse (i.e., abnormal descent) of the pelvic organs is a common costly condition that negatively impacts the lives of millions of women world-wide. Biologic and synthetic meshes are often used in the surgical repair of prolapse due to improved anatomical outcomes over native tissue repairs; but with little scientific data on which to base the selection of a particular product. Unfortunately, the complications associated with certain meshes cause unacceptably high rates of morbidity including infection, tissue contraction, vaginal discharge, and pain. In this proposal, we aim to establish a comprehensive mesh testing center in which previously or newly marketed prolapse meshes can be objectively tested and the next generation of prolapse meshes can be developed based on specific scientific criteria.

描述（由申请人提供）：每年大约有20万美国女性接受手术来修复盆腔器官脱垂（6,7）。生物和合成网被广泛用于脱垂修复，以改善解剖结果，而目前天然组织修复的失败率超过30%。然而，迄今为止，指导外科医生选择特定产品的科学数据很少。因此，网格是根据当地供应商的建议使用的，因此，在试验和错误的基础上放置在妇女身上。然而，越来越多的证据表明，与脱垂补片相关的并发症导致不可接受的高发病率，包括感染、补片收缩、补片糜烂、补片暴露、骨盆、直肠和膀胱疼痛以及性交困难。这些并发症已经变得足够严重，以至于FDA最近发布了关于网状物使用的警告，特别是当网状物经阴道放置时。因此，在本提案中，我们的目标是建立一个跨学科的科学家团队，致力于对以前或新上市的脱垂网进行全面测试，并根据特定的科学标准开发下一代移植材料。在研究的第一阶段，我们确定了阴道脱垂的生化和结构变化如何影响被动和主动的机械行为，从而开发出一种网状物，在这种网状物中，这些缺陷被修复或补偿，使我们能够将阴道脱垂恢复到非脱垂状态。在第二阶段，我们假设当前脱垂网格的缺点是它们太硬。虽然这导致修复的拉伸强度增加，但它是以组织功能为代价的，组织收缩加速，弹性和顺应性降低，平滑肌功能恶化。为了验证我们的假设，我们使用金标准手术程序（腹腔骶colpopexy）将常用的合成脱垂网植入有脱垂的非人灵长类动物的阴道，然后在植入后6个月确定对阴道的细胞，生化和生物力学影响。最后，我们将经阴道植入网片，以表征宿主对这种手术方法的不同反应。在第三阶段，我们探讨未来移植脱垂手术的发展。我们假设，由于其生物诱导效应，生物/合成网状物在恢复阴道结构和功能方面将优于单独的合成网状物。我们建议脱垂修复的一个关键但尚未开发的组成部分是平滑肌反应性的重建，因此，测试使用临时生物活性支架来实现这一过程。通过这种方式，这项拨款提案提供了一种机制，以建立第一个科学家团队，致力于对脱垂网进行全面公正的评估，作为教育当前和未来脱垂外科医生以及公众有关某些材料相关潜在问题的一种手段。事实上，发展这样一个群体对于保护妇女的健康是必不可少的。