# Senolytics and senescent cells

Canonical: https://europeanpeptideshop.com/blog/senolytics-senescent-cells-explained/

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Compound research · 8 November 2026 · 2 min read · By [European Peptide Shop](https://europeanpeptideshop.com/about/)

### On this page

Senolytics are agents that selectively trigger cell death in senescent cells. Senescent cells have stopped dividing but have not died, which is why they are nicknamed zombie cells. The word describes a research approach, not a single product.

## What is a senescent cell?

Senescence is a stress response. The cell enters a stable, near-permanent arrest of division but stays alive and metabolically active. It resists apoptosis, the programmed cell death that normally removes damaged cells, and it releases a mix of signalling molecules known as the senescence-associated secretory phenotype, or SASP. Triggers studied in laboratories include telomere dysfunction and persistent DNA damage. Senescent cells differ by type and there is no single specific marker, so identifying them is difficult.

## How are senolytics classified?

One published scheme groups them by where they act. Some disrupt protein networks that regulate cell survival and are reorganised during senescence. Others switch down survival pathways the cells rely on. A third group acts on housekeeping processes that senescence puts under strain. Sensitivity varies between senescent cell types, so selectivity is a central research question.

## Where does the immune system fit?

Senescent cells are normally cleared by the immune system. If they escape it, they can accumulate. Some research approaches aim to restore that clearance by directing T cells at senescent cells instead of using a small molecule. One example is the peptide SenoMune-0257, announced by Immorta Bio in October 2026, and the [SenoMune-0257 explainer](https://europeanpeptideshop.com/blog/senomune-0257-human-study/) sets out what the company has and has not reported. For other ageing research, see [NAD+ in cellular energy research](https://europeanpeptideshop.com/blog/nad-plus-research/).

## EPS documentation

Use the [research catalogue](https://europeanpeptideshop.com/shop/) to check the exact name, labelled amount and format. The [COA library](https://europeanpeptideshop.com/coa/) publishes the original Janoshik reports selected for EPS, retaining the original report client name and any missing batch fields. Literature findings and another supplier's analytical results are not evidence about an EPS batch.

## Laboratory research only

Materials listed on this site are supplied for in-vitro laboratory research and are not for use in or on humans or animals. They are not medicines. This article summarises published work and gives no dosing, administration, treatment or in-vivo guidance. Findings from a study apply to the material and conditions of that study, and they say nothing about any product listed here.

## References

- [Kirkland and Tchkonia: senolytic drugs, from discovery to translation](https://pubmed.ncbi.nlm.nih.gov/32686219/)

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