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@Emptyset 2022-04-07T09:49:57.000000Z 字数 2107 阅读 281

Questions


关心的基因检测内容:

  1. RET(V292M)峰度44.34:
  2. KRAS(G12C)峰度27.62:
  3. CDK4扩增倍数:17
  4. ERBB3扩增倍数:14
  5. MDM2扩增倍数:28
  6. CDKN2A重排

查阅了几篇关于KRAS-G12C抑制剂与CDK4抑制剂耐药机制相关的Review后有一些疑问,如果只考虑原发肿瘤的基因突变分布(复发后还未做穿刺与基因检测):

RET突变(有文献认为V292M突变[1]会导致RET自磷酸化, 增进Mapk, Mek和Shc, 但相关资料较少,但是突变峰度较高,所以猜想可能也是主驱动),CDK4扩增和KRAS(G12C)三者都可以成为独立的驱动,KRAS-G12C突变(MAPK/ERK and PI3K pathways)和CDK4扩增互成耐药机制[2][3][4][5][6]。单抑制剂的有效性是否存疑?

CDK4抑制剂(如Palbociclib)是否有与一些多靶点抗血管生成药物有联用可能(比如Apatinib对RET是否也有抑制作用?),G12C抑制剂AMG-510能从香港药房买到,同时KRAS-G12C突变也是我很担心的驱动基因,如何看待后线治疗用药顺序以及毒副反应管理?
虽然目前复发后的突变与分布未知,ctDNA是否可以带来一定参考价值?


[1] Castellone, Maria D., Antonella Verrienti, Deva Magendra Rao, Marialuisa Sponziello, Dora Fabbro, Magesh Muthu, Cosimo Durante, et al. “A Novel de Novo Germ-Line V292M Mutation in the Extracellular Region of RET in a Patient with Phaeochromocytoma and Medullary Thyroid Carcinoma: Functional Characterization.” Clinical Endocrinology 73, no. 4 (October 2010): 529–34. https://doi.org/10.1111/j.1365-2265.2009.03757.x.
[2] Akhave, Neal S., Amadeo B. Biter, and David S. Hong. “Mechanisms of Resistance to KRASG12C-Targeted Therapy.” Cancer Discovery 11, no. 6 (June 2021): 1345–52. https://doi.org/10.1158/2159-8290.CD-20-1616.
[3] Ryan, Meagan B., Ferran Fece de la Cruz, Sarah Phat, David T. Myers, Edmond Wong, Heather A. Shahzade, Catriona B. Hong, and Ryan B. Corcoran. “Vertical Pathway Inhibition Overcomes Adaptive Feedback Resistance to KRASG12C Inhibition.” Clinical Cancer Research: An Official Journal of the American Association for Cancer Research 26, no. 7 (April 1, 2020): 1633–43. https://doi.org/10.1158/1078-0432.CCR-19-3523.
[4] Dunnett-Kane, Victoria, Pantelis Nicola, Fiona Blackhall, and Colin Lindsay. “Mechanisms of Resistance to KRASG12C Inhibitors.” Cancers 13, no. 1 (January 5, 2021): E151. https://doi.org/10.3390/cancers13010151.
[5] Fassl, Anne, Yan Geng, and Piotr Sicinski. “CDK4 and CDK6 Kinases: From Basic Science to Cancer Therapy.” Science (New York, N.Y.) 375, no. 6577 (January 14, 2022): eabc1495. https://doi.org/10.1126/science.abc1495.
[6] Pandey, Kamal, Hee-Jung An, Seung Ki Kim, Seung Ah Lee, Sewha Kim, Sun Min Lim, Gun Min Kim, Joohyuk Sohn, and Yong Wha Moon. “Molecular Mechanisms of Resistance to CDK4/6 Inhibitors in Breast Cancer: A Review.” International Journal of Cancer 145, no. 5 (September 1, 2019): 1179–88. https://doi.org/10.1002/ijc.32020.
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