The human body contains hundreds of distinct cell types, and every one of them descends from the same fertilized egg, carrying the same genome. What distinguishes a skin cell from a liver cell, or a blood cell from a nerve cell, is not genetic information but the selective reading of that information. During development, cells become committed to specific fates, and under normal circumstances that commitment is irreversible. A blood cell cannot naturally become a nerve cell, and a skin cell cannot become a liver cell. This stability of identity is one of the defining features of multicellular life, and for most of the history of biology it was considered fixed.

That assumption changed with the advent of cellular reprogramming. By introducing a cocktail of transcription factors, researchers can force a mature cell to read a different set of genetic instructions and embark on a different developmental path. Nerve tissue can now be grown from skin cells, an achievement with obvious implications for treating neurodegenerative diseases, where specific populations of neurons are lost and replacement tissue is scarce. The Bonn group, led by Prof. Dr. Oliver Brüstle, director of the Institute of Reconstructive Neurobiology at the University Hospital of Bonn, has been working at this frontier for years. In earlier studies, his team showed that nerve cells produced through such reprogramming can form connections with existing neurons after transplantation into mouse brains, a critical proof of functional integration.

In the new study, the team applied a direct conversion strategy. Using transcription factor cocktails, they transformed red blood cell precursors straight into induced neural stem cells, bypassing the intermediate stage that most reprogramming protocols require. The resulting cells are restricted to the neural lineage, meaning that only brain cells can emerge from them, but they retain the proliferative capacity and developmental potential characteristic of stem cells. According to Brüstle, this direct route was the key to the study’s most striking finding, because it changed not only what the cells became but how quickly they shed the molecular marks of their age.

To measure rejuvenation, the researchers relied on molecular clocks, tools that track chemical modifications to DNA that accumulate in predictable patterns over a lifetime. These modifications, known collectively as epigenetic marks, do not alter the genetic information itself; instead, they influence how frequently particular genes are read. Because the patterns of these marks change in an orderly way as organisms age, they can be used to estimate the biological age of a cell with remarkable precision. When the Bonn team applied these clocks to their reprogrammed cells, the results were dramatic: cells derived from an 80-year-old donor emerged from the process with a molecular age of less than 20 years, a reduction of roughly six decades.

Crucially, the researchers report that this epigenetic reset is not merely cosmetic. As Brüstle notes, the rejuvenated cells actually behave like young cells, adopting the functional characteristics expected of youthful neural stem cells rather than simply displaying young-looking chemical signatures. This distinction matters, because the central question in the field of cellular rejuvenation is whether the erasure of age-related epigenetic marks corresponds to a genuine restoration of youthful function, or whether it is a superficial byproduct of reprogramming. The Bonn results support the former interpretation, at least for this conversion pathway.

What makes the study genuinely novel, however, is not the fact of rejuvenation but its tempo. Rejuvenation during reprogramming had been observed before, but only in two-step protocols, in which a blood cell is first converted into a pluripotent stem cell, a state in which virtually every career path in the body remains open, and that pluripotent cell is then directed to become a neural stem cell. In that conventional approach, rejuvenation happens very rapidly, compressed into the early phase of the conversion, and is therefore difficult to dissect experimentally. The direct conversion used in Bonn unfolded very differently. Because the blood cells were transformed into neural stem cells without passing through the pluripotent stage, the epigenetic clocks were reset gradually, and the researchers were able to track the process for more than 100 days.

This protracted timeline is what transforms the system from a curiosity into a tool. Rejuvenation that extends over weeks rather than days provides an experimental window through which the underlying mechanisms can be observed in real time. As the researchers point out, because the epigenetic clocks are slowly reset over an extended period, the model can be used to test which factors and active substances accelerate or slow down the rejuvenation process. In effect, the slow conversion turns cellular de-aging into something that can be measured, perturbed, and modulated in the laboratory, opening the door to systematic screens for compounds that influence how cells shed their age-related marks.

The implications extend well beyond basic developmental biology, and the Bonn team is explicit about where they see the greatest relevance. Age is the single most important risk factor for neurodegenerative diseases such as Alzheimer’s, and understanding how the aging process is encoded in cells, and how that encoding can be reversed, is central to any long-term strategy for prevention or treatment. A model in which human cells visibly and gradually de-age over months offers neuroscientists a way to ask precise questions about which molecular events accompany the loss of aging signatures, and whether intervening in those events could protect vulnerable cell types in the aging brain.

The research was carried out by groups from the University Hospital of Bonn, the University of Bonn, and RWTH Aachen University, with funding from the European Union’s Horizon 2020 program, the German Research Foundation, and the Federal Ministry of Research, Technology, and Space. The work, published under the title describing protracted fate acquisition and epigenetic de-aging during induced neural stem cell conversion of human blood cells, adds a new dimension to the growing field of cellular reprogramming. It suggests that the road from an aged blood cell to a youthful brain cell can be made long enough to study, and that in that length lies an opportunity: the chance to finally watch, step by step, what it means for a cell to grow young again.

Subject of Research: Direct reprogramming of human blood cells into induced neural stem cells with epigenetic age reversal

Article Title: Researchers transform old blood cells into young brain cells

Article References: Researchers transform old blood cells into young brain cells. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: cellular reprogramming, epigenetic clocks, neural stem cells, aging, red blood cell precursors, induced neural stem cells, neurodegenerative disease, Alzheimer's disease, University of Bonn, Aging Cell, transcription factors, epigenetics

The central question the researchers set out to answer is deceptively simple: can political leaders influence whether society complies with legal requirements simply through what they say? Brazil offers an ideal testing ground for this question because it contains the largest share of the Amazon rainforest, the world’s most extensive tropical forest and a critical reservoir of biodiversity and carbon. During the first months of Bolsonaro’s term, he and members of his cabinet repeatedly made derogatory remarks about the protection of this ecosystem, creating a natural experiment in how elite signaling might alter behavior at the forest frontier.

To measure deforestation with precision, the team drew on data from the initiative MapBiomas Alerta, which reviews and validates deforestation alerts from multiple satellite-based sources covering the whole of Brazil. This validation process gives researchers a high-quality record of where and when forest loss actually occurred, rather than relying on raw, unverified alerts. On the other side of the analysis, the researchers examined more than 3,600 Twitter posts that Bolsonaro and his ministers of agriculture, environment, and foreign affairs published in 2019. From this large corpus, they identified 38 posts that signaled a lower enforcement risk for infringements against environmental laws, such as statements criticizing conservation policy or downplaying the likelihood of punishment for illegal clearing.

A crucial insight guiding the study’s design is that political messages are only effective if they are heard. A tweet from the president does not automatically reach a farmer deciding whether to clear a remote plot of land. The researchers therefore estimated the Twitter reach of government messaging across 578 municipalities in the Amazon region. Their proxy for exposure was local Twitter activity: they analyzed how many tweets relating to the topic of forest were posted by citizens in each municipality between 2015 and 2018. The logic is straightforward. The higher the pre-existing Twitter activity in a municipality, the greater the likelihood that relevant tweets from the government would be seen there, whether directly or through secondary diffusion.

That diffusion mechanism, the authors argue, likely extends well beyond the platform itself. As Dr. Gustavo Magalhães de Oliveira, a postdoctoral researcher at the Institute for Food and Resource Economics at the University of Bonn, explains, the team assumes such messages spread through word of mouth. Supporters share them, critics share them, and they are discussed locally until they reach the people who actually make decisions about deforestation. Those decision-makers, whether landholders, speculators, or intermediaries coordinating illegal clearing, view the statements as a political signal about how the federal government will treat environmental crime.

The empirical results show a direct and far-reaching response to that signal. In the regions with the greatest exposure to the government’s messaging, deforestation increased significantly in the months when Bolsonaro and his ministers had published posts opposing forest conservation. Importantly, the researchers checked whether this pattern was an artifact of Twitter alone. It was not. As Oliveira notes, the impacts were not limited to Twitter; the same pattern emerges when the team analyzes other forms of exposure, such as television. This convergence across communication channels strengthens the interpretation that the underlying driver is the political signal itself rather than any quirk of one medium or its user base.

One of the most striking findings concerns what did not change. The researchers found that the government statements had no influence on municipal environmental fines or on deforestation bans. In other words, the actual machinery of enforcement on the ground, the inspections, the penalties, and the legal restrictions, remained the proximate context in which landholders operated. What shifted was something more subtle: expectations. According to Oliveira, the analysis indicates that, as a result of the messages, people changed their expectations of the extent to which they would be prosecuted for breaking the law. The effect is thus not attributable to any changes in the local enforcement of forest conservation laws, but to the perceived risk of punishment, which elite rhetoric could lower even as formal rules stayed on the books.

The study also reveals that the phenomenon appears to be driven by economic incentives rather than political loyalty. If the mechanism were simply that Bolsonaro’s base felt emboldened to follow his lead, the effect should have been strongest in municipalities with high levels of support for the president. The data show no such pattern. Instead, the effect was stronger in areas where agricultural returns are high and where nature conservation policy had restricted deforestation in the past. This makes economic sense: rhetoric lowering the perceived cost of illegal clearing matters most where the potential profits from cleared land are large and where accumulated pressure from conservation rules had created pent-up demand for conversion. Where the economic payoff is small, even a permissive political climate does not move the needle.

The magnitudes involved are substantial. The researchers estimate that, in 2019 alone, between 190 and 1,700 square kilometers of forest fell victim to the statements by the Bolsonaro government. The upper bound of that range, nearly 1,700 square kilometers, is almost double the area of Berlin, a comparison that underscores how a handful of social media posts from senior officials can translate into landscape-scale environmental damage. It is worth emphasizing that this estimate is additional to the deforestation driven by the broader weakening of Brazil’s environmental authorities during Bolsonaro’s term, which the study treats as a separate channel. Even setting aside institutional erosion, the perception of a low risk of punishment was itself a relevant driver of forest loss.

Beyond its immediate findings for Brazil, the study carries a broader warning about the power of political language. It provides evidence of how influential words can be when they come from people holding great political power, and it is quite possible that the effect extends beyond forest conservation and the context of the Brazilian Amazon. Wherever compliance with law depends partly on citizens’ beliefs about enforcement, leaders who signal tolerance for rule-breaking may erode that compliance without changing a single regulation. The research was a collaboration between the University of Bonn, the University of Texas at Dallas in the United States, and Wageningen University in the Netherlands, funded by the Bonn SDG Fellowship Program, the German Federal Ministry of Food and Agriculture, the German Research Foundation as part of the German Excellence Strategy, and the EU program Horizon. For scientists and policymakers alike, the message is sobering: in the digital age, the pen, and the tweet, can be mightier than the chainsaw, and protecting forests may require defending not only institutions but the credibility of the rules themselves.

Subject of Research: The effect of political rhetoric on Amazon deforestation and environmental law compliance in Brazil

Article Title: How Bolsonaro’s statements destroyed the rainforest

Article References: How Bolsonaro’s statements destroyed the rainforest. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: Amazon rainforest, deforestation, Jair Bolsonaro, political rhetoric, environmental enforcement, Brazil, Twitter, The Journal of Politics, University of Bonn, MapBiomas Alerta, deterrence, land use

The award places Fischer-Kreer among a select group of university researchers who, according to the organizers, have made important contributions to the transfer of innovations into business alongside their core duties in research and teaching. The initiative describes the honorees as outstanding researchers at their respective universities who represent the highest standards of research excellence in their fields. Collectively, the professors recognized by UNIPRENEURS have supported around 600 startups as mentors, advisory board members, or investors, and 90 percent of them have founded companies themselves. These figures underline the initiative’s central premise: that the most effective champions of university entrepreneurship are academics who combine scholarly credibility with direct, practical experience of the startup world.

For Fischer-Kreer, the recognition carries significance beyond personal achievement. “I am absolutely delighted about the UNIPRENEURS award. This will bring greater attention to the topics of spin-offs and entrepreneurship at our university, as well as to our commitment to promoting them. The award is a great honor,” she said following the ceremony. Her remarks point to a broader argument that she and the initiative share: that knowledge transfer deserves the same institutional weight as the two traditional pillars of academic life. “Transfer is another key task of a university, alongside research and teaching,” she emphasized, adding that she looks forward to further strengthening the entrepreneurial culture at the University of Bonn in the coming years together with her team and colleagues working in the field of transfer.

Fischer-Kreer’s path to the professorship reflects an unusual combination of academic training and industry experience. She studied industrial engineering before earning her doctorate at RWTH Aachen University, one of Germany’s leading technical institutions. She then spent two years in the strategy department of LANXESS, a specialty chemicals company headquartered in Cologne, gaining firsthand exposure to corporate strategy and innovation management. Rather than remaining in industry, she returned to the university environment with what the University of Bonn describes as great enthusiasm, determined to develop innovative and practical teaching formats that would bring entrepreneurial thinking to a much wider student audience than traditional business education typically reaches.

At the University of Bonn, Fischer-Kreer holds the professorship for Entrepreneurial Behaviour, a position focused on understanding and cultivating the psychological and behavioral foundations of entrepreneurship. A central aim of her teaching is to establish entrepreneurship education across faculties, extending it beyond business and economics students to the natural sciences, agriculture, medicine, and other disciplines where research-based spin-offs often originate. Her stated key goal is to empower students to believe in themselves and their abilities, and to view entrepreneurial thinking as a key future skill, whether they ultimately pursue self-employment or drive change within existing organizations. This framing treats entrepreneurship not merely as a career path but as a transferable mindset applicable across the modern economy.

Her pedagogical approach is notably experimental. Among the interdisciplinary formats she has introduced is the use of improvisational theatre in the lecture hall, a technique designed to build the spontaneity, communication skills, and tolerance for uncertainty that entrepreneurs need in practice. Such methods reflect a growing international consensus in entrepreneurship education that entrepreneurial competencies are best developed through experiential learning rather than purely theoretical instruction. By embedding these formats in a full university setting, Fischer-Kreer is working to normalize entrepreneurial learning as part of the standard academic experience at Bonn rather than an optional add-on for a small cohort of already-motivated students.

Her research agenda is similarly distinctive in its choice of settings. Fischer-Kreer explores entrepreneurship in unique and understudied environments, ranging from a sustainable municipality in southern India to the Vatican in Rome and the Archdiocese of Cologne, as well as entrepreneurial dynamics in the Global South. These contexts allow her to examine how entrepreneurial behavior emerges outside the familiar ecosystem of venture capital, incubators, and technology clusters that dominates much of the mainstream literature. Studying entrepreneurship in religious institutions and developing-region municipalities can reveal how motivation, community structures, and resource constraints shape the way individuals identify opportunities and mobilize support for new ventures, insights that feed directly back into her teaching.

Her commitment to fostering an entrepreneurial spirit has also been recognized at the industry level. In 2024, DEUTZ AG in Cologne honored her with the Nicolaus August Otto Award for her dedication to fostering entrepreneurship among business startups in the agriculture and food industries. This focus connects naturally with her institutional affiliations at the University of Bonn, where she is a member of the Transdisciplinary Research Area “Sustainable Futures” and the Cluster of Excellence “PhenoRob,” a research cluster dedicated to digitalization and robotics in crop production. The intersection of agricultural technology, sustainability, and entrepreneurship represents one of the most promising areas for research-based spin-offs, and her work positions the university to support founders in precisely this space.

Beyond teaching and research, Fischer-Kreer plays an active institutional role in the local startup ecosystem. As a board member of the Universitätsgesellschaft Bonn, the university’s support society, she supports and develops the regional startup landscape and promotes the transfer of knowledge and practical expertise between academia and business. She is also the founder of the UGB Transfer Award, which recognizes transfer achievements at the university. Her practical work extends into unusual formats, including the development of gaming and children’s book formats designed to promote an entrepreneurial mindset from an early age. She additionally acts as a VIP+ mentor for Sweethoven Biotech, a project that has developed a healthy sugar alternative based on fundamental research, demonstrating her hands-on involvement in guiding early-stage science-based ventures toward commercialization.

The UNIPRENEURS initiative itself was created by Matthias Hilpert and Martin Schilling with the explicit task of fostering spin-offs at German universities. The Stifterverband für die Deutsche Wissenschaft, a foundation dedicated to science and higher education, is responsible for organizing and implementing the joint initiatives, while the German Startups Association, Bitkom, and AddedVal.io support the program as partners. The award is presented every three years and is described as Germany’s highest honor for outstanding commitment to promoting entrepreneurship at universities. The Federal Ministry of Research, Technology, and Space and the Federal Ministry for Economic Affairs and Energy have jointly assumed the patronage of the initiative, a signal of the strategic importance that German policy attaches to translating academic research into commercial innovation.

Political leaders at the ceremony framed the award in terms of Germany’s broader economic future. “With the UNIPRENEURS initiative, entrepreneurial activity at German universities is being fostered by raising the profile of professors who play a key role,” said Dorothee Bär, Federal Minister of Research, Technology, and Space. “The award recipients make a significant contribution to creating a culture of entrepreneurship at universities and are thus also important drivers of Germany’s capacity for innovation and long-term competitiveness.” Katharina Reiche, Federal Minister for Economic Affairs and Energy, echoed that assessment: “UNIPRENEURS represents the strong link between academic excellence and entrepreneurial courage at our universities. The professors honored make an important contribution to Germany’s competitiveness as an innovation hub.” For the University of Bonn, the recognition of Fischer-Kreer affirms a strategy of embedding entrepreneurship across the institution, and for the honoree herself, it provides a platform from which she intends to keep building that culture in the years ahead.

Subject of Research: National award for university entrepreneurship education and startup promotion in Germany

Article Title: UNIPRENEURS honors Denise Fischer-Kreer

Article References: UNIPRENEURS honors Denise Fischer-Kreer. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: UNIPRENEURS, Denise Fischer-Kreer, University of Bonn, entrepreneurship education, academic spin-offs, knowledge transfer, startup ecosystem, Germany, Stifterverband, entrepreneurial behaviour, innovation, higher education