L2-siRNA

L2-siRNA has been studied in 2 papers since 2025: none in people yet, 2 in animals; 2 in the past year. The research so far is in animals. The newest story, Nov 2, 2026: “Age had little effect on gene-silencing RNA activity in mice”.

Intervention

2 papers study it2 findingsUpdated Jun 15, 2026

See all 2 papers on L2-siRNA

At a glance

The findings reach mice, none yet in people. 1 lab in 1 country.

None of its findings points the other way.

1 lab in 1 country

Funders: National Cancer Institute and 3 more

Animals2

What did studies of L2-siRNA find?

Studies of L2-siRNA measured 2 outcomes; the most studied are toxicity (1 study) and HTT (1).

Toxicity

no changein mice1

1 study

L2-siRNA showed no clear effect on toxicity in mice.
“L2-siRNA did not generate detectable toxicity in the CNS or periphery of aged mice.”
Animals
Evaluating the effects of aging on biodistribution and gene silencing activity of lipid-siRNA conjugates delivered into cerebrospinal fluid
bioRxiv : the preprint server for biologyDec 19, 2025Preprint

HTT

downin mice1

1 study

L2-siRNA inhibits HTT in mice.
“L2-siRNA exhibited comparable biodistribution and on-target silencing of Huntingtin (Htt) between young and aged mice in all tested regions of the central nervous system (CNS)”
Animalscentral nervous system
Evaluating the effects of aging on biodistribution and gene silencing activity of lipid-siRNA conjugates delivered into cerebrospinal fluid
bioRxiv : the preprint server for biologyDec 19, 2025Preprint

Latest

2 papers in 12 months

Molecular TherapyJun 16

Age had little effect on gene-silencing RNA activity in mice

One dose reduced target gene messages by more than 70% versus controls in several brain regions of both young and aged mice.One dose reduced target gene messages by more than 70% versus controls in several brain regions of both young and aged mice.

Mouse studyInterventions

Paper

bioRxivDec 25

Evaluating the effects of aging on biodistribution and gene silencing activity of lipid-siRNA conjugates delivered into cerebrospinal fluid

Preprint: experiments in miceInterventions