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Updated: Dec 3, 2025
A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
Published on: June 8, 2014
Novel method for gain-of-function analyses in primary osteoclasts using a non-viral gene delivery system
Keizo Nishikawa1,2,3, Masaru Ishii4,5
1Laboratory of Cell Biology and Metabolic Biochemistry, Department of Medical Life Systems, Graduate School of Life and Medical Sciences, Doshisha University, Tatara Miyakodani 1-3, Kyotanabe, Kyoto, 610-0394, Japan. kenishik@mail.doshisha.ac.jp.
Liposome-mediated RNA transfection offers a rapid and efficient method for gene delivery into osteoclast precursors and mature osteoclasts, surpassing traditional retroviral vector limitations in RANKL-treated cells.
Area of Science:
- Cell Biology
- Molecular Biology
- Gene Delivery
Background:
- Overexpression studies are crucial for advancing cell biology.
- Osteoclast differentiation involves bone marrow-derived monocyte macrophage precursors (BMMs) treated with macrophage colony-stimulating factor and receptor activator of nuclear factor-kB ligand (RANKL).
- Retroviral vectors are standard for BMM gene delivery but are inefficient in RANKL-treated osteoclasts.
Purpose of the Study:
- To enhance gene delivery into differentiated BMMs, specifically RANKL-treated osteoclasts.
- To evaluate liposome-mediated RNA transfection as an alternative to retroviral vectors.
- To improve gain-of-function analyses in osteoclast precursors and mature osteoclasts.
Main Methods:
- Bone marrow-derived monocyte macrophage precursors (BMMs) were used.
- Cells were transfected with enhanced yellow fluorescent protein (EYFP) RNA via lipofection.
- Cells were also transduced with a retroviral vector expressing EYFP for comparison.
- EYFP expression was quantified using flow cytometry.
Main Results:
- EYFP RNA transfection led to observable EYFP expression within 3 hours, significantly faster than retroviral transduction (24 hours).
- The efficiency of EYFP RNA transfection was comparable to retroviral transduction in BMMs.
- Transfection with EYFP RNA resulted in significantly higher EYFP expression in RANKL-treated BMMs compared to retroviral infection.
Conclusions:
- RNA-mediated gene delivery provides a rapid and straightforward method for gain-of-function studies.
- Liposome-mediated RNA transfection is effective for both primary osteoclast precursors and mature osteoclasts.
- This technique overcomes the limitations of retroviral vectors in RANKL-stimulated osteoclasts.
