2373

113 / 8. 5~ 8. 11

藥訊

HER2陽性轉移性大腸直腸癌的治療新曙光(下)

 

 

 




◎文/藥師盧雅紋

 

 



註1:Grades based on National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.03


註2:Tucatinib階梯式劑量降階建議

 


縮寫:ULN = upper limit of normal; ALT = alanine aminotransferase; AST = aspartate aminotransferase


(續)藥物介紹:


二、Trastuzumab deruxtecan (Enhertu)


Trastuzumab deruxtecan是抗體藥物複合體(ADC)由三個部分所組成,由人源化抗HER2 之IgG1單株抗體(monoclonal Antibody, mAb), 以共價鍵結合至topoisomerase I 抑制劑(DXd),透過四胜肽可裂解連接子共鍵結到DXd。抗體部份則是以DNA重組技術,每個抗體分子連接約8個deruxtecan分子。


在2023年ASCO年會上發表DESTINY-CRC02第二期研究,比較Enhertu 5.4 mg/kg的劑量治療HER2陽性的mCRC病人,相較於6.4 mg/kg。研究結果得知,無論是RAS野生型或RAS突變型,支持以5.4 mg/kg劑量靜脈注射trastuzumab deruxtecan,每3週一次,作為HER2陽性mCRC病人的最佳劑量。


 

 



cORR: confirmed objective response rate; DOR: duration of response; DCR: disease control rate; PFS: progression-free survival; OS: overall survival


參考資料:


1. Ivanova M, Venetis K, Guerini-Rocco E, et al. HER2 in Metastatic Colorectal Cancer: Pathology, Somatic Alterations, and Perspectives for Novel Therapeutic Schemes. Life (Basel). 2022;12(9):1403. 
2. Sheffels E, Kortum RL. The Role of Wild-Type RAS in Oncogenic RAS Transformation. Genes (Basel). 2021;12(5):662. 
3. Fraga T, de Sousa MJ, Magalhães J, et al. HER2 Status in RAS and BRAF Wild-Type Metastatic Colorectal Cancer: A Portuguese Study. Cureus. 2023;15(7):e42536. 
4. Raghav K, Siena S, Takashima A, et al. Trastuzumab deruxtecan (T-DXd) in patients (pts) with HER2-overexpressing/amplified (HER2+) metastatic colorectal cancer (mCRC): primary results from the multicenter, randomized, phase 2 DESTINY-CRC02 study. J Clin Oncol. 2023;41(suppl 16):3501. doi:10.1200/JCO.2023.41.16_suppl.3501
5.Tukysa package leaflet
6.Enhertu package leaflet


(全文完)


(本文作者為衛生福利部臺中醫院臨床藥師/倫敦大學臨床藥學碩士)

 

 

 

 

 

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