Reprogramming pulls in hundreds of millions, again
One technique in ageing biology is absorbing nearly all investment. That raises questions about what gets left behind.
NewLimit has raised $435 million in a Series C round for its work on epigenetic reprogramming, as reported by Fight Aging!. The company focuses on liver cells, aiming to make older liver cells behave more like younger ones. This approach falls under what researchers call partial reprogramming.
What is partial reprogramming?
Cells carry a record of their ageing history. That record is stored in epigenetic marks: chemical labels on DNA that determine which genes are active. In partial reprogramming, those marks are partially reset, without fully dedifferentiating the cell. The idea is that cells start functioning more like younger versions of themselves while retaining their identity.
Alongside NewLimit, Retro Bio, Life Biosciences, and the considerably larger Altos Labs are all investing in similar programmes. Significant capital has already flowed into this single field this year alone. Other areas of ageing biology, including senolytics (compounds that clear senescent cells), attract far less funding despite a larger and longer-standing body of animal data, according to the Fight Aging! analysis.
What is being missed?
The concentration of investment in reprogramming has a downside. Promising preclinical programmes in other directions receive less funding. The so-called valley of death, the gap between early laboratory work and a first human clinical trial, remains difficult to cross for those areas.
Whether reprogramming is actually safe and effective in humans still has to be demonstrated. Life Biosciences is preparing clinical studies; NewLimit is targeting human trials in the near future. The coming years will provide the first answers to whether this wave of investment was justified.
From a longevity perspective, it is striking how strongly investment logic shapes the direction of the field, independent of which approach has the strongest scientific foundation.