KARAMBIOSCIENCE
EST. 2026
EVIDENCE / 02
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CRISPR Atlas / External evidence
Immortalized cell line

An edit can worsen senescence: TOP2B in HEK293T cells

Researchers at the University of Hyderabad disrupted the TOP2B promoter in HEK293T cells and observed senescence. It is a useful counterexample to the idea that removing gene activity necessarily rejuvenates cells.

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Concept illustration / not experimental evidence

What was reported

Researchers at the University of Hyderabad disrupted the TOP2B promoter in HEK293T cells and observed senescence. It is a useful counterexample to the idea that removing gene activity necessarily rejuvenates cells. [C11]

What the result does not establish

HEK293T is an immortalized laboratory model, not normal aged human tissue. The finding is a directional warning, not a validated human-aging target.

Measured endpoint

Senescent phenotypes following promoter disruption.

Karam’s next question

Is a candidate intervention impairing cell maintenance rather than restoring it, and does the chosen model expose that risk?

Assessment-derived brief. Cited in the supplied 15 October 2026 project assessment; not independently reviewed in this website release. Karam has not reproduced the experiment or independently audited the underlying dataset. This is not Karam-generated evidence.

Record transparency

The details—and the missing values.

Extraction scope: supplied project assessment, not an independent full-methods extraction
Study date2026-05-19
Reported regionIndia
Species / biological systemHuman-derived immortalized line
Target / subjectTOP2B promoter
Cell or population contextHEK293T cells
Perturbation directionPromoter deletion
MethodCas9 nuclease
Delivery settingLaboratory Cas9 perturbation
ComparatorNot extracted in the supplied assessment; review the primary source before using this field.
Donor contextNot extracted in the supplied assessment; review the primary source before using this field.
Sample size / unitNot extracted in the supplied assessment; review the primary source before using this field.
Follow-upNot extracted in the supplied assessment; review the primary source before using this field.
Safety measurementsNot extracted in the supplied assessment; review the primary source before using this field.
Independent replicationNot established in the supplied assessment
Data accessNot extracted in the supplied assessment; review the primary source before using this field.

What would this evidence change?

Use the context in this record to define a bounded research or diligence question. A cited finding is not a validated Karam asset.

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