Zombie cells (senescent cells), a contradictory topic, have a heterogeneous nature (“double-edged sword”); they can prevent cancer for years while also accelerate the formation of malignant cells. That creates the most sensitive space for research.
Some studies also highlighted the role of ZC in age-related disorders such as Alzheimer’s, dementia, osteoporosis, etc., and persistent inflammation linked to the aging process. Their buildup also prompts the emergence of a variety of chronic illness.
Normal cells either die or live in cellular apoptosis, whereas “zombie cells” remain metabolically active but no longer divide.
The motive of senescence is to impede the division of damaged cells; conversely, during this period, they discreetly adapt to more aggressive cell division. Targeting zombie cells could be a promising cancer treatment approach.
Mechanism
ZC possesses a proinflammatory secret senescence-associated secretory phenotype (SASP) and enters a long-lasting growth arrest gateway, releasing cytokines, chemokines, and matrix metalloproteinases while also triggering epigenetic alterations in histones and DNA.
Tumorigenic impact
Creating new blood vessels—MMP-2, MMP-9, and VEGR-A.
Amplify local inflammation—Interleukin-6 and 8 suppress pro-apoptosis factors (BAX, PUMA, etc.) while activating Cyclin D1 and c-Myc, hence limiting tumorigenesis.
Metastasis—IL-6-mediated epithelial-mesenchymal transition (EMT) directs cancer cells to break away from parent tumors and move via the bloodstream to form new tumors in distinct organs.
Anti-tumorigenic impact
Immune Activation: To eradicate senescence and premalignant cells, which are crucial to the initial stage of neoplastic cells, SASP first attracts natural killer cells and other macrophages.
Tumor suppression: Damaged DNA plays a key role in stopping the proliferation of the cells.
I go through a research study that claims zombies have a protective protein barrier known as “GPX4” that may even resist fatal ferroptosis, a kind of cell death linked to elevated iron levels and the destructive reactive oxygen species. Ferroptosis poses a serious threat to senescence cells. By blocking the GPX4 protective shelf, zombie cells can die. Researchers have tested the drug in a mouse and observed that eliminate senescence *halts tumorigeneses and boost survival rate. There are ongoing studies on senolytic drugs that are paying quite a bit of attention in the cancer treatment scenario.
What additional information do you have about zombie cells and current research?
MBH/PS
