Senescence Related to Reprogramming and Regeneration

Previous Science Note

Scientists have discovered that, in the absence of resident stem cells, senescent cells can instruct neighboring somatic cells to reprogram. This reprogramming enables them to become stem cells, driving whole-body regeneration in the cnidarian Hydractinia symbiolongicarpus.

Senescence-induced cellular reprogramming drives cnidarian whole-body regeneration
Click here for the original article: Miguel Salinas-Saavedra, et. al., Cell Reports, 2023.

Point of Interest
- Amputation injury induces senescence in a small number of specific head cells in Hydractinia
- Senescent cells persist in the tissue for several hours before being expelled
- Signals emitted by senescent cells induce the reprogramming of neighboring cells
- These reprogrammed cells proliferate and drive the process of whole-body regeneration

Related Techniques
           First choice for cellular senescence assay Cellular Senescence Detection Kit – SPiDER-ßGal
           Cellular senescence assay with a plate reader Cellular Senescence Plate Assay Kit – SPiDER-ßGal
           Mitophagy detection Mitophagy Detection Kit and Mtphagy Dye
           Cell cycle assay Cell Cycle Assay Solution Blue / Deep Red
           Dead cell staining for flow cytometry Dead Cell Makeup Blue / Deep Red - Higher Retention than PI
           Lysosomal pH detection Lysosomal Acidic pH Detection Kit-Green/RedGreen/Deep Red
           Mitochondrial function/glycolysis detection Glycolysis/JC-1 MitoMP Assay Kit
           Oxygen consumption rate assay Extracellular OCR Plate Assay Kit
 
Related Applications
Regulating Cell Cycle Arrest: p16, p21, p53, and pRB
       

 

Irreversible cell cycle arrest is one of the phenomena that characterize cellular senescence. p16, p21, p53, and pRB (phosphorylated retinoblastoma protein) are known as representative protein markers. The activation/upregulation of these proteins are used as indicators of cellular senescence. These marker proteins are known to be tumor suppressors and regulate the cell cycle mainly through two pathways (p16Ink4a-RB and p53-p21CIP1).


Doxorubicin (DOX) is known as an anticancer drug that acts in the G2/M phase of the cell cycle to arrest cell proliferation and induce cellular senescence (see the upper left figure).  The figure on the left shows the results of an experiment in which DOX was added to A549 cells. As a result, changes in SA-ß-Gal expression, cell cycle progression, and mitochondrial membrane potential were observed.


- Cell Cycle Assay Solution Blue / Deep Red
JC-1 MitoMP Detection Kit
Cellular Senescence Detection Kit

 

 

 


 

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