Biến đổi gen CXCR4 bằng Cas9 từ Staphylococcus aureus giúp tế bào kháng lại nhiễm HIV-1

Springer Science and Business Media LLC - Tập 14 - Trang 1-12 - 2017
Qiankun Wang1, Shuliang Chen1,2, Qiaoqiao Xiao1, Zhepeng Liu1, Shuai Liu1, Panpan Hou3, Li Zhou4, Wei Hou1, Wenzhe Ho1, Chunmei Li1,5, Li Wu2, Deyin Guo1,5
1School of Basic Medical Sciences, Wuhan University, Wuhan, People’s Republic of China
2Center for Retrovirus Research, Department of Veterinary Biosciences, The Ohio State University, Columbus, USA
3College of Life Sciences, Wuhan University, Wuhan, People’s Republic of China
4Animal Biosafety Level III Laboratory at the Center for Animal Experiment, Wuhan University, Wuhan, People’s Republic of China
5School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou, People’s Republic of China

Tóm tắt

Hệ thống CRISPR/Cas9 đã được sử dụng rộng rãi trong chỉnh sửa gen ở các tế bào động vật có vú. CXCR4 là một đồng thụ thể cho virus gây suy giảm miễn dịch ở người type 1 (HIV-1), và việc mất chức năng CXCR4 có thể bảo vệ tế bào khỏi nhiễm HIV-1 thuộc tuýp CXCR4 (X4), khiến CXCR4 trở thành một mục tiêu quan trọng cho liệu pháp gen HIV-1. Tuy nhiên, kích thước lớn của hệ thống CRISPR/SpCas9 đã tạo ra một trở ngại cho việc chuyển giao hiệu quả vào các tế bào T CD4+ nguyên thủy. Gần đây, một Cas9 nhỏ từ Staphylococcus aureus (SaCas9) đã được phát triển như một công cụ chỉnh sửa gen để giải quyết vấn đề này. Do đó, nó cung cấp một chiến lược triển vọng cho liệu pháp gen HIV-1 nếu được sử dụng để nhắm vào CXCR4. Ở đây, chúng tôi đã sử dụng một phiên bản ngắn của Cas9 từ Staphylococcus aureus (SaCas9) để nhắm vào CXCR4. Chúng tôi đã chứng minh rằng việc chuyển giao virus lentivirus mang SaCas9 và các RNA dẫn đường đơn cho CXCR4 vào các dòng tế bào T CD4+ của người đã kích hoạt hiệu quả quá trình chỉnh sửa gen CXCR4, khiến các dòng tế bào này kháng lại nhiễm HIV-1 thuộc tuýp X4. Hơn nữa, chúng tôi đã chuyển giao hiệu quả các tế bào T CD4+ nguyên thủy của người bằng virus adeno liên kết mang CRISPR/SaCas9 và đã làm gián đoạn biểu hiện CXCR4. Chúng tôi cũng cho thấy rằng các tế bào T CD4+ nguyên thủy đã chỉnh sửa CXCR4 sinh sản bình thường và kháng lại nhiễm HIV-1. Nghiên cứu của chúng tôi cung cấp cơ sở cho việc áp dụng chỉnh sửa gen nhắm vào CXCR4 bằng CRISPR/SaCas9 trong liệu pháp gen HIV-1.

Từ khóa

#CXCR4 #HIV-1 #CRISPR #SaCas9 #chỉnh sửa gen

Tài liệu tham khảo

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