{`\\section{Results}\\label{sec:results}
We first asked whether `}{`\\textbf{lead H-3}`}{` modulates astrocytic GAT-3
without affecting GAT-1-mediated synaptic clearance. Bath
application of `}{`10\\,$\\mu$M H-3`}{` in
acute hippocampal slices `}{`\\citep{harriot2025astro}`}{`
produced a `}{`33.4\\,\\%$\\pm$2.1`}{` reduction in tonic GABA
current relative to vehicle (Fig.~`}{`\\ref{fig:ltp}`}{`a),
without affecting paired-pulse ratios `}{`\\citep{lin2024rwif,
yamamoto2025sleep}`}{`.
\\subsection{LTP induction is preserved under H-3}
Theta-burst stimulation evoked normal LTP in slices treated
with H-3 (potentiation `}{`172\\,\\%$\\pm$8`}{` of baseline
at 60\\,min) compared to vehicle (`}{`168\\,\\%$\\pm$11`}{`;
$p\\,{=}\\,0.42$, $n\\,{=}\\,12$ slices per group). This finding
contrasts with non-selective `}{`SNAP-5114, which`}{`
suppresses LTP at equivalent doses `}{`\\citep{patel2025sparse}`}{`,
suggesting that astrocyte-selective GABA reuptake inhibition
spares the synaptic mechanisms required for LTP.`}
We first asked whether lead H-3 modulates astrocytic GAT-3 without affecting GAT-1-mediated synaptic clearance. Bath application of 10 μM H-3 in acute hippocampal slices4 produced a 33.4% ± 2.1 reduction in tonic GABA current relative to vehicle (Fig. 1a), without affecting paired-pulse ratios1,2.
Theta-burst stimulation evoked normal LTP in slices treated with H-3 (potentiation 172% ± 8 of baseline at 60 min) compared to vehicle (168% ± 11; p = 0.42, n = 12 slices per group). This finding contrasts with non-selective SNAP-5114, which suppresses LTP at equivalent doses5, suggesting that astrocyte-selective GABA reuptake inhibition spares the synaptic mechanisms required for LTP.