What does this research mean for the field?

Long-term expression of the BK channel auxiliary subunit LRRC26 in the forebrain induces BK channel hyperactivity, resulting in locomotor hyperactivity, cognitive deficits, and ADHD-like behaviors in mice. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine how activator-induced hyperactivity of large-conductance calcium- and voltage-activated potassium (BK) channels in the forebrain influences mammalian behavior and brain function.

September 10, 2026eNeuroOpen Access

Transgenic expression of BK channel auxiliary LRRC26 subunit in the forebrain causes locomotor hyperactivity and cognitive defects

Q: What is the clinical evidence from this study?

Population: BK channel hyperactivity / ADHD-like neurological consequences (n=33). Intervention: Transgenic expression of hLRRC26 vs. Control mice (hLRRC26TRE alone or with DOX). Primary outcome: Locomotor activity and cognitive performance.

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Key result

Long-term hLRRC26 expression in mice drives hyperactivity and cognitive impairment, revealing potential ADHD-like effects.

n=33

Why the study?

The impact of BK channel activator-induced hyperactivity and the physiological implications of BK channel gain-of-function on brain function remain inadequately understood.

Key Points

To determine how activator-induced hyperactivity of large-conductance calcium- and voltage-activated potassium (BK) channels in the forebrain influences mammalian behavior and brain function.
Generated conditional transgenic mice expressing human LRRC26 (hLRRC26) in forebrain neurons using the CaMKIIα promoter and tetracycline Tet-Off system via post-weaning doxycycline withdrawal.
Evaluated histological expression across brain regions and conducted behavioral batteries—including open field, footprint, Morris water maze, novel object recognition, and rotarod tests—in pooled cohorts of both sexes at 2–4 and 12–14 months.
Transgenic mice exhibited persistent locomotor hyperactivity with significantly elevated total movement distance in the open field test and shortened stride length during footprint analyses relative to controls.
Mice expressing hLRRC26 displayed pronounced learning and memory impairments across the water maze, novel object recognition, and rotarod assays, alongside increased anxiety- and depression-like behaviors.
Hyperactive locomotion and cognitive deficits persisted into late adulthood (12–14 months of age), indicating sustained ADHD-like phenotypes arising from forebrain BK channel gain-of-function.

Structured PICO

Population

33 transgenic mice expressing human LRRC26 in the forebrain and control mice, tested at 2-4 and 12-14 months of age to evaluate the behavioral effects of BK channel hyperactivity.

Intervention

Induction of hLRRC26 expression in the forebrain via post-weaning doxycycline withdrawal.

Comparator

hLRRC26TRE littermate controls and DOX-fed control mice (tTACaMKIIα/hLRRC26TRE + DOX).

Outcome

Locomotor activity (measured by open field test, footprint test, rotarod test) and cognitive performance (measured by water maze, novel object recognition).

Transgenic expression of the BK channel activator LRRC26 in the mouse forebrain leads to locomotor hyperactivity and cognitive impairments, revealing potential ADHD-like consequences of BK channel gain-of-function.

Discussion

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Implication

Links forebrain BK hyperactivity to ADHD-like behaviors in mice; hypothesis-generating for human ADHD and requires clinical validation.

Cite This Study

Chen et al. (2026) studied BK channel hyperactivity / ADHD-like neurological consequences (n=33). Transgenic expression of hLRRC26 vs. Control mice (hLRRC26TRE alone or with DOX) was evaluated on Locomotor activity and cognitive performance. Transgenic mice with long-term hLRRC26 expression in the forebrain exhibited heightened locomotor activity and cognitive impairments, revealing potential ADHD-like consequences of BK channel hyperactivity.

synapsesocial.com/papers/6aa27b3558559d80afc7445d https://doi.org/10.1523/eneuro.0053-25.2026

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Transgenic expression of BK channel auxiliary LRRC26 subunit in the forebrain causes locomotor hyperactivity and cognitive defects

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Transgenic expression of BK channel auxiliary LRRC26 subunit in the forebrain causes locomotor hyperactivity and cognitive defects

Key Points

Structured PICO

Discussion

Implication

Cite This Study

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