Modeling New Therapeutic Approaches for Malignant Melanoma

模拟恶性黑色素瘤的新治疗方法

• 批准号: 8966669
• 负责人: Ann Richmond
• 金额: --
• 依托单位: VETERANS HEALTH ADMINISTRATION
• 依托单位国家: 美国
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2017-09-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8966669
• 关键词: Address; Adverse effects; Affect; Age; Agonist; American; Antibodies; Antitumor Response; Apoptosis; BRAF gene; Cell Aging; Cell Cycle; Cell Death; Cells; Cessation of life; Chemical Exposure; Chemotherapy-Oncologic Procedure; Clinical Trials; Combined Modality Therapy; Cytotoxic T-Lymphocyte-Associated Protein 4; DNA Damage; Data; Disease regression; Effectiveness; Epidemic; Gene Mutation; Growth; Health; Human; Immune; Immunologic Surveillance; Immunotherapy; Implant; Induction of Apoptosis; Leukocytes; Link; MDM2 gene; MEKs; Malignant Neoplasms; Melanoma Cell; Metastatic Melanoma; Mitosis; Modeling; Mus; Mutate; Mutation; Myeloid Cells; Neoplasm Metastasis; Operative Surgical Procedures; Pathway interactions; Patients; Pharmaceutical Preparations; Phase II Clinical Trials; Phenotype; Placebos; Population; Production; Progression-Free Survivals; Property; Proteins; Recruitment Activity; Relapse; Resistance; Resistance development; STK6 gene; Severe Adverse Event; Stabilizing Agents; Staging; Sun Exposure; T cell response; TNFRSF10A gene; TNFRSF10B gene; TNFSF10 gene; TP53 gene; Testing; Therapeutic; Time; Toxic effect; Tumor Cell Invasion; Ubiquitination; Unresectable; Veterans; aurora kinase; base; chemotherapy; design; experience; improved; inhibitor/antagonist; kinase inhibitor; macrophage; melanoma; mutant; neoplastic cell; novel therapeutic intervention; older men; pre-clinical; preclinical study; receptor; research study; response; senescence; success; therapeutic effectiveness; treatment response; tumor; tumor growth; tumor microenvironment

DESCRIPTION (provided by applicant): Metastatic melanoma is one of the fastest growing tumor types in the US, especially in Veterans, and also is one of the most challenging malignancies to treat. While there has been some recent success for melanoma tumors that carry the BRAFV600 mutation, the response is transient and treatment is complicated by development of resistance as well as secondary tumors. Both BRAFWT and BRAFV600 melanoma tumors are eligible for treatment with CTLA-4 or PD1 antibody to boost the T cell response to tumor, only 20-30 percent of the tumors respond with the 2-4 month increase in overall survival. Our preclinical experiments have focused on stopping tumor growth by blocking cell cycle with the Aurora kinase A (AURKA) inhibitor, MLN8237. Most human melanoma tumors implanted into immune deficient mice respond strongly to therapy with MLN8237, but the drug largely induces senescence and slows tumor growth, but does not cause regression. We now have strong preliminary data showing that combining the AURKA inhibitor with inhibitors of MDM2 or activators of death receptors 4 or 5 (DR4, DR5) pushes the tumor cells rendered senescent by MLN8237 into apoptosis and causes tumor regression. We now want to carryout advanced pre-clinical studies using these combinations of therapy to treat human melanoma tumor implants into mice to test the hypothesis that combining AURKA inhibitor therapy with agents that stabilize p53 by inhibition its ubiquitination by MDM2 or agents that activate DRs will provide improved therapy for late BRAFWT melanoma or melanomas that develop resistance to BRAF inhibitors. There are 3 specific aims: Aim IA: To characterize the effectiveness of combined therapy with the MDM antagonist, Nutlin-3a, and the AURKA inhibitor, MLN8237, for treatment of BRAFWT/p53WT, NRasmutant/p53WT, NRasWT/p53WT melanoma. Aim IB. To examine the effect of the Nutlin-3a and MLN8237 combination treatment on the growth of BRAFV600 /p53WT melanoma tumor implants from patients that have developed resistance to BRAF inhibitors. Aim IIA. To characterize the effects of combined treatment with MDM2 antagonist Nutlin-3a and AURKA inhibitor MLN8237 on tumor microenvironment an on melanoma metastasis. Aim IIB. To evaluate the potential for boosting the antitumor response of myeloid cells to enhance melano-ma tumor cell death in association with MLN8237 and Nutlin-3a. We will express constitutively active IKK� in myeloid cells to push them into an antitumor phenotype. Melanoma tumors growing in mice with WT or constitutively active IKK� in myeloid cells will be treated with MLN8237 and Nutlin-3a and growth of tumor and metastatic properties of tumor will be evaluated. Aim IIIA. To characterize the effectiveness of combining treatment with agonist for the death receptors DR4 and DR5 with MLN8237 for treatment of BRAFWT, NRAS WT or NRAS mutant melanoma tumors that are either p53WT or p53mutant. Aim IIIB. To evaluate the effectiveness of combined DR5, DR4 agonists with MLN8237 for BRAF inhibitor resistant BRAFV600 melanoma.

描述（由申请人提供）： 转移性黑色素瘤是美国增长最快的肿瘤类型之一，尤其是在退伍军人中，也是最具挑战性的恶性肿瘤之一。虽然携带 BRAFV600 突变的黑色素瘤肿瘤最近取得了一些成功，但效果是短暂的。 BRAFWT 和 BRAFV600 黑色素瘤都适合用 CTLA-4 或 PD1 抗体治疗，以增强 T 细胞对肿瘤的反应，因此治疗因耐药性和继发性肿瘤而变得复杂。只有 20-30% 的肿瘤有反应，总体生存期增加 2-4 个月。我们的临床前实验重点是通过使用极光激酶 A (AURKA) 抑制剂 MLN8237 阻断细胞周期来阻止肿瘤生长。免疫缺陷小鼠对 MLN8237 治疗产生强烈反应，但该药物在很大程度上会诱导衰老并减缓肿瘤生长，但不会导致肿瘤消退，我们现在有强有力的初步数据表明，将AURKA 抑制剂与 MDM2 抑制剂或死亡受体 4 或 5（DR4、DR5）激活剂可促使 MLN8237 导致衰老的肿瘤细胞凋亡并导致肿瘤消退，我们现在希望使用这些治疗组合进行高级临床前研究。将人类黑色素瘤肿瘤植入小鼠体内，以测试以下假设：将 AURKA 抑制剂疗法与通过 MDM2 抑制 p53 泛素化来稳定 p53 的药物或可抑制 p53 的药物相结合激活 DR 将为晚期 BRAFWT 黑色素瘤或对 BRAF 抑制剂产生耐药性的黑色素瘤提供改进的治疗有 3 个具体目标： 目标 IA：表征 MDM 拮抗剂 Nutlin-3a 和 AURKA 抑制剂 MLN8237 联合治疗的有效性。 ，用于治疗 BRAFWT/p53WT、NRasmutant/p53WT、NRasWT/p53WT 黑色素瘤。 IB.检查 Nutlin-3a 和 MLN8237 联合治疗对已对 BRAF 抑制剂产生耐药性的患者的 BRAFV600 /p53WT 黑色素瘤肿瘤植入物的生长的影响，以表征与 MDM2 拮抗剂 Nutlin- 联合治疗的效果。 3a 和 AURKA 抑制剂 MLN8237 对肿瘤微环境和黑色素瘤转移的影响。与 MLN8237 和 Nutlin-3a 相关，增强骨髓细胞的抗肿瘤反应，从而增强黑色素瘤肿瘤细胞死亡。我们将在骨髓细胞中表达组成型活性 IKK�，以推动它们在 WT 或 小鼠中生长的黑色素瘤肿瘤。将使用 MLN8237 和 Nutlin-3a 治疗骨髓细胞中持续活跃的 IKK� 以及肿瘤生长和转移特性将评估死亡受体 DR4 和 DR5 激动剂与 MLN8237 联合治疗 p53WT 或 p53 突变的 BRAFWT、NRAS WT 或 NRAS 突变黑色素瘤的有效性。评估 DR5、DR4 激动剂与 MLN8237 联合治疗 BRAF 抑制剂耐药性的有效性BRAFV600 黑色素瘤。