TAILIEUCHUNG - Báo cáo khoa học: "Radiosensitization and growth inhibition of cancer cells mediated by an scFv antibody gene against DNA-PKcs in vitro and in vivo"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: Radiosensitization and growth inhibition of cancer cells mediated by an scFv antibody gene against DNA-PKcs in vitro and in vivo. | Du et al. Radiation Oncology 2010 5 70 http content 5 1 70 RADIATION ONCOLOGY RESEARCH Open Access Radiosensitization and growth inhibition of cancer cells mediated by an scFv antibody gene against DNA-PKcs in vitro and in vivo Li Du Li-Jun Zhou Xiu-Jie Pan Yu-Xiao Wang2 Qin-Zhi Xu Zhi-Hua Yang Yu Wang Xiao-Dan Liu Mao-Xiang Zhu1 Ping-Kun Zhou1 Abstract Background Overexpression of DNA-dependent protein kinase catalytic subunit DNA-PKcs is commonly occurred in cancers and causes radioresistance and poor prognosis. In present study the single-chain variable antibody fragments scFv targeting DNA-PKcs was developed for the application of radiosensitization in vitro and in vivo. A humanized semisynthetic scFv library and the phage-display antibodies technology were employed to screen DNA-PKcs scFv antibody. Methods DNA-PKcs epitopes were predicted and cloned. A humanized semisynthetic scFv library and the phagedisplay antibodies technology were employed to screen DNA-PKcs scFv antibody. DNA damage repair was analyzed by comet assay and immunofluorescence detection of gH2AX foci. The radiosensitization in vivo was determined on Balb c athymic mice transplanted tumours of HeLa cells. Results Four epitopes of DNA-PKcs have been predicted and expressed as the antigens and a specific human anti-DNA-PKcs scFv antibody gene anti-DPK3-scFv was obtained by screening the phage antibody library using the DNA-PKcs peptide DPK3. The specificity of anti-DPK3-scFv was verified in vitro. Transfection of HeLa cells with the anti-DPK3-scFv gene resulted in an increased sensitivity to IR decreased repair capability of DNA double-strand breaks DSB detected by comet assay and immunofluorescence detection of gH2AX foci. Moreover the kinase activity of DNA-PKcs was inhibited by anti-DPK3-scFv which was displayed by the decreased phosphorylation levels of its target Akt S473 and the autophosphorylation of DNA-PKcs on S2056 induced by radiation. Measurement of the growth and

TÀI LIỆU LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.