Related Experiment Video
Updated: May 21, 2026

Identifying Caspases and their Motifs that Cleave Proteins During Influenza A Virus Infection
Published on: July 21, 2022
The protective effect of 3-deoxysappanchalcone on in vitro influenza virus-induced apoptosis and inflammation
Fan Yang1, Wei-Ling Zhou, Ai-Lin Liu
1Beijing Key Laboratory of Drug Target Research and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Abstract:
Influenza virus is one of the most important causes of acute respiratory disease. Viral infection and viral replication activate multiple cell signalling pathways. Apoptosis of infected cells and immune response against viral replication, which are generally considered to be protective mechanisms, are also probably mediated by viruses, which lead to severe health problems. We previously reported that 3-deoxysappanchalcone (3-DSC), a compound that is isolated from Caesalpinia sappan, exhibited in vitro anti-influenza activity. In the present study, we further identified that 3-DSC inhibited viral genomic replication and transcription only at a relatively high concentration. We then evaluated the effect of 3-DSC on the regulation of virus-induced cellular apoptosis. 3-DSC ameliorated virus-induced DNA fragmentation in a concentration-dependent manner, which tends to be a consequence of its inhibition of upstream caspase activation. 3-DSC also protected host cells against influenza-induced inflammation by suppressing CCL5 and CXCL10 secretions in endothelial cells and reducing the production of IL-6 and IL-1β in monocytes/macrophages. In conclusion, our results demonstrate that anti-influenza virus mechanisms of 3-DSC involved anti-apoptosis and anti-inflammation activities in vitro. Moreover, 3-DSC could be a promising drug candidate for influenza treatment.
Insights
3-deoxysappanchalcone (3-DSC) shows anti-influenza activity by reducing viral replication and inflammation. This compound also prevents apoptosis, making it a potential treatment for influenza.
Area of Science:
- Virology
- Pharmacology
- Immunology
Background:
- Influenza virus causes severe acute respiratory disease.
- Viral replication triggers cell signaling pathways, including apoptosis and immune responses.
- 3-deoxysappanchalcone (3-DSC), from Caesalpinia sappan, previously showed in vitro anti-influenza activity.
Purpose of the Study:
- To investigate the anti-influenza mechanisms of 3-DSC.
- To evaluate 3-DSC's effect on virus-induced apoptosis and inflammation.
Main Methods:
- Assessing 3-DSC's inhibition of viral genomic replication and transcription.
- Evaluating 3-DSC's impact on virus-induced DNA fragmentation and caspase activation.
- Measuring 3-DSC's effect on inflammatory cytokine secretions (CCL5, CXCL10, IL-6, IL-1β).
Main Results:
- 3-DSC inhibited viral replication and transcription at high concentrations.
- 3-DSC ameliorated virus-induced DNA fragmentation by inhibiting caspase activation.
- 3-DSC suppressed inflammatory cytokine production in endothelial cells and monocytes/macrophages.
Conclusions:
- 3-DSC exhibits anti-influenza activity through anti-apoptotic and anti-inflammatory effects in vitro.
- 3-DSC demonstrates potential as a therapeutic drug candidate for influenza treatment.
Related Concept Videos
Leaky Scanning
Influenza
The Extrinsic Apoptotic Pathway
Caspases
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Phagocytosis of Apoptotic Cells
Normal cells contain receptors that prevent them from being recognized by phagocytes.

