Chất đạm virus chọn lọc khối u apoptin tiêu diệt hiệu quả tế bào ung thư đường mật ở người

Springer Science and Business Media LLC - Tập 82 - Trang 56-63 - 2003
Alexandra M. Pietersen1,2, Saskia A. Rutjes2,3, Joost van Tongeren1, Ronald Vogels4, John G. Wesseling3, Mathieu H. M. Noteborn1,2,5
1Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
2Leadd BV, Leiden, The Netherlands
3Experimental Hepatology, AMC Liver Center, Academic Medical Center, Amsterdam, The Netherlands
4Crucell Holland BV, Leiden, The Netherlands
5Leiden Institute of Chemistry, Leiden, The Netherlands

Tóm tắt

Ung thư đường mật, hay còn gọi là cholangiocarcinoma, có tiên lượng xấu. Phẫu thuật cắt bỏ là phương pháp điều trị duy nhất có khả năng chữa khỏi, nhưng chỉ một số ít bệnh nhân đủ điều kiện. Hóa trị liệu và bức xạ gamma chỉ mang tính palliation, vì chúng không thể loại bỏ hoàn toàn khối u. Chất đạm apoptin có nguồn gốc từ virus gây thiếu máu ở gà kích thích quá trình chết tế bào (apoptosis) trong nhiều loại tế bào ung thư ở người và không bị cản trở bởi các đột biến inactivate hóa p53 hoặc sự biểu hiện quá mức của Bcl-2, những thay đổi được biết đến là có thể làm thất bại hóa trị và liệu pháp bức xạ. Chúng tôi đã kiểm tra xem apoptin có tiêu diệt được tế bào ung thư đường mật hay không. Việc biểu hiện apoptin thông qua plasmid đã gây ra sự chết tế bào rộng rãi trong ba dòng tế bào cholangiocarcinoma độc lập, CC-LP, CC-SW và Mz-ChA-1, bất kể các đột biến gây ung thư của chúng, gồm có inactivate p16 và p53 cùng sự gián đoạn của con đường tín hiệu yếu tố tăng trưởng chuyển dạng β. Việc truyền apoptin in vitro bằng vector adenovirus đã hoàn toàn tiêu diệt các tế bào cholangiocarcinoma. Hơn nữa, việc đồng biểu hiện của ức chế caspase phổ rộng p35 với apoptin chỉ làm chậm lại sự chết tế bào mà apoptin gây ra. Các thay đổi trong hình thái nhân tế bào vẫn diễn ra sớm sau khi chuyển gen, và nhân tế bào cuối cùng đã phân hủy, gợi ý rằng cái chết tế bào do apoptin gây ra trong các tế bào này không bị chặn bởi các đột biến trong cả giai đoạn khởi đầu hay thực hiện của apoptin. Việc kích thích hiệu quả cái chết tế bào bởi apoptin trong các dòng tế bào cholangiocarcinoma biến apoptin thành một ứng cử viên hấp dẫn cho liệu pháp phân tử trong điều trị ung thư đường mật.

Từ khóa

#ung thư đường mật #cholangiocarcinoma #apoptin #apoptosis #điều trị phân tử #tế bào ung thư

Tài liệu tham khảo

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