RT Journal Article T1 Effective Knockdown of Gene Expression in Primary Microglia With siRNA and Magnetic Nanoparticles Without Cell Death or Inflammation. A1 Carrillo-Jimenez, Alejandro A1 Puigdellívol, Mar A1 Vilalta, Anna A1 Venero, Jose Luis A1 Brown, Guy Charles A1 StGeorge-Hyslop, Peter A1 Burguillos, Miguel Angel K1 Alzheimer’s disease K1 CD33 K1 CGC K1 TREM2 K1 microglia K1 siRNA K1 transfection AB Microglia, the resident immune cells of the brain, have multiple functions in physiological and pathological conditions, including Alzheimer's disease (AD). The use of primary microglial cell cultures has proved to be a valuable tool to study microglial biology under various conditions. However, more advanced transfection methodologies for primary cultured microglia are still needed, as current methodologies provide low transfection efficiency and induce cell death and/or inflammatory activation of the microglia. Here, we describe an easy, and effective method based on the Glial-Mag method (OZ Biosciences) using magnetic nanoparticles and a magnet to successfully transfect primary microglia cells with different small interfering RNAs (siRNAs). This method does not require specialist facilities or specific training and does not induce cell toxicity or inflammatory activation. We demonstrate that this protocol successfully decreases the expression of two key genes associated with AD, the triggering receptor expressed in myeloid cells 2 (TREM2) and CD33, in primary microglia cell cultures. SN 1662-5102 YR 2018 FD 2018-09-21 LK https://hdl.handle.net/10668/27381 UL https://hdl.handle.net/10668/27381 LA en DS RISalud RD Apr 6, 2025