A newly published study in Nature Metabolism reports that brown fat can act as a hub of molecular messaging, using secreted microRNAs to coordinate physiology across the body. Researchers focused on brown adipose tissue—well known for its role in thermogenesis—and asked whether it also participates in long-distance communication via RNA signals.

To visualize and track these messages, the team employed brown-fat–specific RNA labeling in living systems. This strategy allowed them to connect RNA production within adipocytes to downstream effects elsewhere, moving beyond correlations toward a clearer map of inter-organ RNA traffic.

The central finding is the presence of a communication network mediated by microRNAs released from brown fat. These small regulatory RNAs appear to travel beyond the tissue of origin and engage gene-regulatory pathways in other organs, effectively relaying information about metabolic state.

Functionally, the work supports a model in which microRNA “dispatch” from thermogenic fat tunes cellular programs in remote targets. Such programs likely involve post-transcriptional regulation, a process microRNAs are known to influence by pairing with complementary sequences in messenger RNAs.

Importantly, the approach does not treat microRNAs as generic circulating molecules. Instead, the labeling confirms their brown-fat origin and strengthens the link between secretory RNA dynamics and systemic physiological outcomes.

The study also highlights the specificity of the messaging: not all RNAs are equally represented, and the labeled microRNA repertoire points to organized, tissue-defined signaling rather than random leakage.

Beyond mapping pathways, the results carry implications for metabolic disease research. If brown fat microRNAs can reshape gene expression in other organs, manipulating these signals could offer a route to modulate energy balance, insulin sensitivity, or inflammatory tone.

For now, the findings provide a blueprint for how RNA labelling combined with tissue specificity can uncover hidden layers of endocrine-like communication. As techniques improve, the field may move toward a broader “RNA connectome” linking organ behavior through secreted regulatory molecules.

Researchers describe their results as evidence that brown fat is not only a metabolic engine but also an information broadcaster. In the evolving landscape of viral-style science news, this discovery underscores how tiny RNA molecules can orchestrate large-scale biological conversations.

Subject of Research: Inter-organ communication via secreted microRNAs from brown adipose tissue.

Article Title: Brown fat-specific RNA labelling reveals a network of inter-organ communication by secreted microRNAs.

Article References: Lino, M., Palermo-Ruiz, G., Efthymiou, V. et al. Brown fat-specific RNA labelling reveals a network of inter-organ communication by secreted microRNAs. Nat Metab (2026). https://doi.org/10.1038/s42255-026-01558-0

Image Credits: AI Generated

DOI: https://doi.org/10.1038/s42255-026-01558-0

Naked mole-rats have long puzzled biologists with their striking eusocial structure, where most adults remain reproductively suppressed while a queen controls the colony’s future. Now, a new study identifies a chemical “queen odour” that links social status to endocrine control, revealing a mammalian analogue to insect queen pheromones.

The molecule, termed IPM, is enriched by the queen and acts as the key mediator of reproductive suppression in non-breeding females. When IPM is present, circulating prolactin rises while progesterone is suppressed, locking the colony into a stable reproductive hierarchy characterized by reduced conflict and maintained group cohesion.

Crucially, the team connects this behavioural outcome to the brain. Using multiple approaches—including non-invasive functional ultrasound imaging (fUSI)—they show that IPM provokes strong activation of olfactory neurons and central neural circuits. This provides a neural substrate for how a chemical cue can trigger colony-wide physiological change, rather than relying on social learning or passive association.

The experiments also clarify sensory routing. Ablating olfaction abolishes aggression initiation and lowers prolactin levels, directly tying IPM detection to reproductive suppression. While the findings are consistent with sensing through the main olfactory epithelium, the authors note that the vomeronasal system may still contribute.

Queen removal normally destabilizes colonies, leading to aggression, reproductive competition, prolactin decline, and, in extreme cases, mortality. Yet when IPM is added to queenless bedding, the colony remains stable for months. During this period, fecal progesterone metabolite levels stay low, indicating sustained ovarian quiescence alongside elevated prolactin.

The study also addresses a longstanding paradox: transferring soiled bedding and urine from parent colonies fails to maintain suppression in isolated individuals. The authors propose that IPM’s chemistry helps explain this discrepancy. As a long-chain fatty acid ester with low volatility, IPM may persist within the colony environment but fail to travel effectively over distance or survive transfer pathways that preferentially carry other chemicals.

Comparative work extends beyond naked mole-rats. IPM is detected in breeding females of four additional Fukomys species. Although reproductive suppression mechanisms may differ across species, the presence of a similar queen-linked odorant suggests convergent chemical strategies for managing reproductive skew in eusocial mammals.

Overall, the research reframes reproduction control as a chemosensory-to-endocrine pathway: IPM activates olfactory–hypothalamic signalling, elevating prolactin and inhibiting GnRH release. This “social hormone” model offers a new principle for social evolution—chemical cues can synchronize behaviour and physiology at the scale of an entire mammal colony.

Subject of Research: Reproductive suppression and social hierarchy in eusocial mammals (naked mole-rats and related Fukomys species)

Article Title: A queen odour mediates reproductive suppression in a eusocial mammal

Article References:

Khallaf, M.A., Hart, D.W., Luo, W. et al. A queen odour mediates reproductive suppression in a eusocial mammal.
Nature (2026). https://doi.org/10.1038/s41586-026-10772-5

Image Credits: AI Generated

DOI: https://doi.org/10.1038/s41586-026-10772-5

Keywords: IPM; queen odour; reproductive suppression; prolactin; GnRH; olfaction; eusociality; functional ultrasound imaging; Fukomys

UK regulator Ofcom launched an investigation into TikTok to assess whether the platform is meeting its obligations under the country’s Online Safety Act to protect children from harmful digital content.

The probe will assess whether the ByteDance-owned platform has implemented effective age assurance systems to determine if a user is underage and prevent children from encountering harmful material online.

Ofcom’s Age Assurance report, published today, suggested that some age inference models including those used by TikTok “may have failed to correctly identify a significant proportion of children”, potentially exposing them to harmful content.

If compliance failures are identified, the watchdog could impose fines of up to £18 million or 10% of the company’s global revenue, whichever is greater. In serious cases, it can also order third parties, including payment providers, advertising services or internet service providers, to withdraw services or block access to the platform in the UK.

A TikTok spokesperson told Reuters the platform “strictly enforces age-appropriate experiences through expert-informed platform rules and advanced age inference technologies, in line with major industry peers”, adding, “we are confident that we meet our Online Safety Act obligations and will work with Ofcom to demonstrate this”.

The probe follows initial findings published by Ofcom in May, which revealed TikTok was the service most frequently cited by children as a source of harmful content. More than half of underage users who recalled seeing harmful content identified TikTok as the source, ahead of YouTube, Instagram, Snapchat and Facebook.

At the time, the regulator found personalised, algorithm-driven content feeds were a key route through which children encountered harmful material online. It added TikTok was “particularly concerning” as it was one of the platforms that had “not committed to any significant changes in response to our specific demands”.

Last month, the UK government laid out plans to impose a sweeping ban on social media access for under-16 users, alongside restrictions on gaming and live-streaming platforms.

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France’s competition authority assumed control of investigating a proposed purchase and subsequent carve-up of SFR by Iliad Group, Bouygues Telecom and Orange, after the European Commission (EC) referred the element falling under its remit.

In a statement, Autorite de la Concurrence estimated its probe into the three related transactions would take at least 18-months due to the complexity of the cases and markets involved.

When the parties announced the agreement in June, they estimated completion in H2 2027.

Because Orange and Bouygues Telecom generate more than two-thirds of their European Union-wide turnover in France, their agreements automatically fell under the remit of the national authority, but the EC could have looked directly into Iliad’s involvement because it did not meet the same criteria.

However, following an application from the company, the European regulator referred that part to France as well.

Autorite de la Concurrence noted the EC had considered it is “best placed to examine the transaction, in particular in view of its impact on the French market, the experience of the Autorite in the sector concerned and the fact the transaction is linked to two transactions with a national dimension”.

It plans to co-operate with the EC during the review.

The French regulator is already in discussions with Orange and Bouygues Telecom ahead of the pair making formal submissions and is now set to undertake a process with Iliad.

Its probe is set to include stakeholder consultation including consumer protection organisations and other regulators.

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Google DeepMind CEO Demis Hassabis called for the establishment of a new US-led regulatory framework to govern frontier AI, proposing a self-regulatory structure which could bypass political opposition.

In a post on X, Hassabis warned the breakneck pace of commercial and geopolitical competition is currently outstripping the industry’s understanding of the technology.

He noted the arrival of Artificial General Intelligence (AGI) is likely only a few short years away.

To address looming technical, biological, and cybersecurity risks without stifling innovation, Hassabis proposed creating a new US standards body.

He modelled it after a self-regulatory organisation like the Financial Industry Regulatory Authority (FINRA), rather than a traditional government agency.

The structural choice comes amid heavy resistance to AI regulation from the tech industry and shifting policies from the Trump administration.

The FINRA-style blueprint would be staffed by leading technical experts and open-source representatives but primarily funded by the industry to secure the massive compute resources needed for testing.

TechCrunch reported the proposed system would replace the current, highly criticised ad hoc government reviews previously used for models like Anthropic’s Mythos and OpenAI’s Sol.

Those reviews drew fire from industry onlookers for a distinct lack of technical expertise and opaque decision-making, according to the news outlet.

Under Hassabis’s framework, the independent body would define thresholds to classify models as Frontier-Class. Organisations behind them, dubbed Frontier Labs, would eventually be required to pass the independent assessments to deploy in the US market.

Hassabis stated assessments would check for advanced threats, deception, and guardrail bypass attempts. The standards body could also outsource specific evaluations to a growing ecosystem of independent, third-party AI safety groups.

He argued the approach is designed to keep up with AI’s acceleration, allowing the industry to safely steer toward an era of scientific abundance while addressing the Trump administration’s concern over state-mandated red tape.

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The European Commission (EC) approved €659 million in German state aid to finance four new semiconductor facilities, in line with the bloc’s Chips 2.0 Act.

Europe’s executive arm stated the measures would contribute to strengthening the European Union’s (EU) position and autonomy in the semiconductor value chain by supporting “the construction of first-of-a-kind facilities”.

Germany will provide direct grants of €353 million, €214 million, €74.4 million and €17.9 million, respectively, to build the four semiconductor facilities.

The biggest sum will be invested in Baesweiler in North Rhine-Westphalia, on a site to manufacture silicon carbide epi-wafers. The EC explained this new type of semiconductor is expected to be used in various sectors including automotive, industrial, telecoms and energy, enabling improvements in the manufacturing process.

Positive effect
All beneficiaries of the investments have agreed to ensure the broader impact of the projects have positive effects on the EU semiconductor value chain, and strengthens collaboration with universities and research institutions. They also pledged to fulfil orders on a priority basis, develop specialised training programmes and share project-related profits with Germany.

The EC explained an assessment of the plan indicated the measures would promote development of economic activities by creating capacity in Europe, had limited impact on competition and trade in the EU, and had a positive effect on the region’s semiconductor sector.

It stated the awards are the 15^th to 18^th under its Chips Act 2.0 adopted last month and the original Chips Act.

Under the initiatives, it has provided cumulative aid of around €14.2 billion.

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Switzerland’s competition authority launched a preliminary antitrust investigation into Google after it scrapped a search engine selection feature for Swiss users setting up Android devices.

In a statement, the country’s Secretariat of the Competition Commission (COMCO) accused Google of discontinuing the Android Choice Screen feature for users in Switzerland while continuing to offer it in the European Economic Area (EEA).

The screen allows users to select their preferred default search engine during the initial setup of a new Android device.

Swiss users are apparently now presented with Google Search as the default option without being shown the Choice Screen. The watchdog argued this could strengthen the search giant’s position by reducing the visibility of rival providers and “reinforcing barriers to entry” at a critical stage of device setup.

The Choice Screen is designed to reduce “the lock-in effects associated with preconfigured settings”, noting default settings “play a decisive role” in digital markets, the regulator stated.

The watchdog flagged broader competition concerns, stating the change “could affect the ability of search engine providers and, more broadly, other digital service providers to compete”.

A further point of concern for COMCO was the continued availability of the feature in the EEA, arguing the disparity “creates an unequal treatment…even though the competitive issues are comparable”.

Wider assessment
The preliminary investigation will determine whether Google’s conduct breaches Switzerland’s Cartel Act, under which COMCO can impose administrative fines of up to 10% of a company’s Swiss turnover over the previous three years.

“We look forward to cooperating fully with the authority to address ​their questions,” a Google spokesperson told Reuters.

While the probe is focused on Android, the watchdog added its findings “could also be relevant to the assessment of practices related to default settings on other mobile devices”.

Early this year, the UK’s Competition and Markets Authority (CMA) opened a similar antitrust investigation into Google’s mobile ecosystem over concerns the company used its market power to set up barriers against rival services and favour their own products.

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