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Updated: Jun 28, 2026
Development and Functional Characterization of Murine Tolerogenic Dendritic Cells
Published on: May 18, 2018
[Effect of inhibitor of differentiation-1 on murine dendritic cell sarcoma cells]
Xiao-Cui Bian1, Yu-Qin Liu, Bei Gu
1Department of Pathology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing 100005, China.
Objective:
To investigate the effect of down-expression of inhibitor of differentiation-1 (Id-1) on the differentiation of dendritic cell sarcoma (DCS) cells in vitro.
Methods:
Down-regulation of the expression of Id-1 in DCS cells was performed by RNAi, and confirmed by protein and mRNA quantitative analyses. Cellular differentiation and biological behavior including malignant phenotypes of the cells were evaluated. All experiments included negative (no treatment group and no-target siRNA) and positive (induction-differentiation drug sodium butyrate) controls.
Results:
When the expression of Id-1 was down regulated, the DCS cells showed more mature morphology including cell enlargement, longer cellular extensions, more branches, and decreased nuclear/plasma ratio. Differentiation marker expression (Id-2 and CD86) was also increased. RNAi treated cells at 24 and 48 hours, showed increase percentage of cells at G0/G1 phase and less cells at S phase (P < 0.01). Importantly, the abilities of cell proliferation, colony formation and invasiveness were significantly decreased (P < 0.01), as evidenced by MTT, colony formation and transwell assays respectively.
Conclusion:
RNAi inhibition of Id-1 protein can induce differentiation of malignant solid tumor cells along with reversion of their malignant phenotype.
Insights
Inhibiting the inhibitor of differentiation-1 (Id-1) using RNAi promotes dendritic cell sarcoma (DCS) cell differentiation. This down-regulation reduces malignant phenotypes, including proliferation and invasiveness.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Biology
Context:
- Dendritic cell sarcoma (DCS) is a rare malignancy.
- The role of inhibitor of differentiation-1 (Id-1) in DCS progression is not fully understood.
- Targeting Id-1 may offer a novel therapeutic strategy for DCS.
Purpose:
- To investigate the effect of down-regulating Id-1 expression on DCS cell differentiation.
- To assess the impact of Id-1 inhibition on the malignant behavior of DCS cells in vitro.
Summary:
- RNA interference (RNAi) was used to down-regulate Id-1 expression in DCS cells.
- Id-1 down-regulation led to increased cell differentiation, characterized by morphological changes and increased expression of differentiation markers (Id-2, CD86).
- Malignant phenotypes, including cell proliferation, colony formation, and invasiveness, were significantly reduced following Id-1 inhibition.
Impact:
- Demonstrates that inhibiting Id-1 can induce differentiation of malignant solid tumor cells.
- Suggests that Id-1 down-regulation can revert malignant phenotypes.
- Provides a potential therapeutic avenue for treating dendritic cell sarcoma by targeting Id-1.
