siRNA Against KIR3DL1 as a Potential Gene Therapeutic Agent in Controlling HIV-1 Infection

作者：Fu Geng Feng; Pan Ji Cheng; Lin Nan; Hu Hai Yang; Tang Wei Ming; Xu Jin Shui; Wang Xiao Liang; Xu Xiao Qin; Qiu Tao; Liu Xiao Yan; Chen Guo Hong; Mahapatra Tanmay; Huan Xi Ping; Yang Hai Tao^*

来源：Viral Immunology, 2014, 27(5): 207-213.

DOI：10.1089/vim.2013.0126

Objectives: The aim of this study was to develop a small interfering RNA (siRNA) against the expression of KIR3DL1 receptor on natural killer (NK) cells, in order to promote the ability of NK cells to destroy human immunodeficiency virus (HIV)-infected cells and thus prevent failure of siRNA therapy targeting human immunodeficiency virus type 1 (HIV-1) virus among HIV-1 infected patients in vitro. Methods: A siRNA targeting KIR3DL1 was synthesized and then modified with cholesterol, methylene, and sulfate. The inhibitory action of the siRNAs on primary cultured NK cells was detected. The amount of IFN-gamma and TNF-alpha secretions in NK cells was measured. The intended functions of NK cells in vitro were analyzed by CFSE and PI methods. Results: There were no significant differences in inhibiting the expression of KIR3DL1 on NK cells between the modified and unmodified siRNAs, while inhibition by each of them differed significantly from controls. The amount of IFN-gamma and TNF-alpha secretions in the NK cells was abundant due to unsuccessful expression of KIR3DL1 on NK cells, which further promoted function of the NK cells. Conclusion: The siRNA against KIR3DL1 could enhance the ability of the NK cells to kill the HIV-1 infected cells in vitro and successfully prevented the failure of siRNA therapy targeting the HIV-1 virus. Therefore, it can act as a potential gene therapeutic agent among HIV-1 infected people.

• 出版日期2014-6
• 单位厦门大学; 江苏省疾病预防控制中心