Original title: Rtel1 in hypothalamic oxytocin neurons regulates oxytocin output and social behaviors in mice
Junwen Wang, Xiaqing Wang, Zilong Qiu · September 2026
A gene called RTEL1 is tied to autism risk, but scientists did not know how it works in the brain. Researchers studied mice with half the normal amount of RTEL1. They discovered that RTEL1 normally untangles tricky knots in DNA called G-quadruplexes near the start of the oxytocinA hormone that helps with social bonding and trust. gene, using energy to unwind them. In brain cells that make oxytocin, a hormone key to bonding, lacking enough RTEL1 drops oxytocin levels. This shortage blunted oxytocin release during social encounters. As a result, the mice struggled with social novelty, buried more marbles, and showed more anxiety. When scientists restored RTEL1 in these specific brain cells in adult mice, oxytocin levels rose and the behavioral issues improved.
You are putting together a flat-pack bookshelf. One instruction page is crumpled into a tight ball. You can see the edges of the steps, but the crucial middle part is hidden by the creases. You need someone to carefully smooth the page flat so you can read the complete instructions. Here, the DNA near the oxytocin gene is folded into a tight G-quadruplex, and RTEL1 is the protein that smooths it out, allowing the gene to be read and oxytocin produced.
This study reveals that a gene linked to autism risk, RTEL1, directly regulates social behavior by controlling oxytocin neuron function. It shows that DNA structures called G-quadruplexes can influence gene expression in the brain. This opens a new avenue for understanding the molecular basis of social deficits in disorders like autism.
The abstract doesn't say what the limitations are. It only reports findings in mice and focuses on specific behaviors like social novelty and anxiety. It does not address whether the same mechanism applies in humans or across different developmental stages.
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Rtel1 in hypothalamic oxytocin neurons regulates oxytocin output and social behaviors in mice — Junwen Wang, Xiaqing Wang, Zilong Qiu — bioRxiv — doi:10.64898/2026.09.10.750776
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.