2022 สิงหาคม: The most apical portion of polarised epithelial and endothelial cells contains tight junctions, which are specialised membrane domains. The transmembrane proteins known as claudins, which are essential parts of tight junctions and have extracellular loops, are prospective targets for both diagnostic and therapeutic approaches. They might be crucial in the development of tumours and inflammation. In several epithelial malignancies, changes in claudin expression have been demonstrated to promote tumour growth, affect signalling cascades, and impair tight junction function. Tight junctions are damaged in malignancies, and claudin proteins lose their main function. Many malignancies, such as gastric cancer (GC), hepatocellular carcinoma (HCC), biliary tract cancer (BTC), breast cancer, renal cell carcinoma, pancreatic cancer (PC), มะเร็งปอดชนิดไม่ใช่เซลล์ขนาดเล็ก (NSCLC), and mesothelioma, have improperly regulated claudins.
GC and PC are two malignancies that frequently express claudin 18.2, a member of the claudin family. Except for the gastric mucosa, healthy tissues do not express claudin 18.2. A highly effective chimeric IgG1 mAb that binds to claudin 18.2 on the surface of tumour cells, zolbetuximab, was recently created and is being tested in clinical studies. Notably, zolbetuximab plus standard chemotherapy as a first-line therapy increased median survival in claudin 18.2-expressing GC patients compared to chemotherapy alone in a phase II trial (NCT01630083). This encouraging finding shows that in order to expand the clinical applicability of this innovative drug to treat various cancer types, การทดลองทางคลินิก utilising it are required. The widespread expression of claudin 18.2 is a significant and remarkable finding for the treatment of cancer given that patients who are positive for human epidermal growth factor receptor 2 (HER2) and who are currently being treated with the novel agent trastuzumab make up only 10-15% of all cases of GC (21).
สถานะของ claudin 18.2 ในเนื้องอกประเภทต่างๆ ยังไม่ได้รับการตรวจสอบอย่างละเอียดโดยใช้ immunohistochemistry ซึ่งมีนัยสำคัญ (IHC) เราดำเนินการตรวจสอบ claudin 18.2 IHC ที่คาดหวังในกลุ่มผู้ป่วยที่มีเนื้องอกมะเร็งชนิดก้อนที่แตกต่างกัน เพื่อตรวจสอบการทำงานของ claudin 18.2 ในฐานะตัวบ่งชี้ทางชีวภาพ
