Related Experiment Video
Updated: Feb 19, 2026
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
Published on: March 24, 2017
Small Interfering RNA-Mediated Suppression of Fas Modulate Apoptosis and Proliferation in Rat Intervertebral Disc
Jong-Beom Park1, Chanjoo Park1
1Department of Orthopaedic Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Study Design:
In vitro cell culture model.
Purpose:
To investigate the effect of small interfering RNA (siRNA) on Fas expression, apoptosis, and proliferation in serum-deprived rat disc cells.
Overview Of Literature:
Synthetic siRNA can trigger an RNA interference (RNAi) response in mammalian cells and precipitate the inhibition of specific gene expression. However, the potential utility of siRNA technology in downregulation of specific genes associated with disc cell apoptosis remains unclear.
Methods:
Rat disc cells were isolated and cultured in the presence of either 10% fetal bovine serum (FBS) (normal control) or 0% FBS (serum deprivation to induce apoptosis) for 48 hours. Fas expression, apoptosis, and proliferation were determined. Additionally, siRNA oligonucleotides against Fas (Fas siRNA) were transfected into rat disc cells to suppress Fas expression. Changes in Fas expression were assessed by reverse transcription-polymerase chain reaction and semiquantitatively analyzed using densitometry. The effect of Fas siRNA on apoptosis and proliferation of rat disc cells were also determined. Negative siRNA and transfection agent alone (Mock) were used as controls.
Results:
Serum deprivation increased apoptosis by 40.3% (p<0.001), decreased proliferation by 45.3% (p<0.001), and upregulated Fas expression. Additionally, Fas siRNA suppressed Fas expression in serum-deprived cultures, with 68.5% reduction at the mRNA level compared to the control cultures (p<0.001). Finally, Fas siRNA-mediated suppression of Fas expression significantly inhibited apoptosis by 9.3% and increased proliferation by 21% in serum-deprived cultures (p<0.05 for both).
Conclusions:
The observed dual positive effect of Fas siRNA might be a powerful therapeutic approach for disc degeneration by suppression of harmful gene expression.
Insights
Small interfering RNA (siRNA) targeting Fas suppressed Fas expression, reducing apoptosis and increasing proliferation in rat disc cells. This suggests siRNA is a potential therapy for disc degeneration.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Small interfering RNA (siRNA) can inhibit gene expression via RNA interference (RNAi).
- The application of siRNA for targeting genes involved in disc cell apoptosis is not well-established.
- Investigating siRNA's role in disc degeneration is crucial.
Purpose of the Study:
- To examine the impact of siRNA on Fas expression, apoptosis, and proliferation in rat disc cells under serum deprivation.
- To assess the therapeutic potential of targeting Fas using siRNA in disc degeneration models.
Main Methods:
- Rat disc cells were cultured in normal (10% FBS) or serum-deprived (0% FBS) conditions.
- Fas expression, apoptosis, and proliferation were measured.
- Small interfering RNA targeting Fas (Fas siRNA) was transfected to suppress Fas expression, with controls including negative siRNA and mock transfection.
Main Results:
- Serum deprivation significantly increased apoptosis and decreased proliferation, while upregulating Fas expression.
- Fas siRNA effectively suppressed Fas mRNA levels by 68.5% in serum-deprived cells.
- Fas siRNA treatment inhibited apoptosis by 9.3% and enhanced proliferation by 21% in serum-deprived conditions.
Conclusions:
- Fas siRNA demonstrates a dual beneficial effect by reducing apoptosis and promoting proliferation in disc cells.
- Targeting Fas with siRNA presents a promising therapeutic strategy for managing disc degeneration by downregulating detrimental gene expression.
More Related Videos
Related Concept Videos
02:15Experimental RNAi
01:17The Extrinsic Apoptotic Pathway
01:31The Intrinsic Apoptotic Pathway
01:16TGF - β Signaling Pathway
02:30siRNA - Small Interfering RNAs
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
01:17Intracellular Signaling Affects Focal Adhesions
Some...