One particularly pernicious category of DNA lesions is DNA–protein crosslinks (DPCs). These covalent linkages between DNA strands and associated proteins can be instigated by endogenous metabolites such as aldehydes, including formaldehyde, or exogenous exposures like chronic alcohol consumption. Moreover, they may arise as inadvertent errors during DNA replication or repair processes. DPCs pose a formidable impediment to DNA polymerases, causing replication fork stalling and hampering faithful chromosome segregation. The persistence of these crosslinks threatens the integrity of the genome and jeopardizes cellular viability.

A pivotal guardian against the DNA–protein crosslink menace is the metalloprotease enzyme SPRTN. This specialized protease recognizes and cleaves DPCs, facilitating their removal and thereby enabling the resumption of replication fork progression. Genetic mutations that impair SPRTN function underlie Ruijs-Aalfs syndrome, a rare hereditary disorder characterized by premature onset bone deformities and liver cancer in adolescence. Despite recognition of SPRTN’s role, the downstream pathological mechanisms stemming from its loss have remained elusive, obstructing therapeutic development.

Recent investigations spearheaded by Prof. Ivan Ðikić and colleagues at Goethe University Frankfurt have elucidated heretofore unappreciated systemic consequences of SPRTN deficiency. Employing both cultured cell models and genetically engineered murine systems, their research demonstrated that the absence of functional SPRTN exacerbates the accumulation of DNA damage within the nucleus. Strikingly, this unrepaired damaged DNA was observed to aberrantly translocate into the cytoplasm, breaching the nuclear envelope’s compartmentalization.

This cytoplasmic presence of nuclear DNA incites a potent innate immune response. Cells interpret cytosolic DNA as a pathogenic danger signal, typically indicative of viral or bacterial invasion or oncogenic transformations. Specifically, extraneous DNA in the cytoplasm activates the cyclic GMP-AMP synthase (cGAS) – stimulator of interferon genes (STING) signaling axis. This pathway triggers an inflammatory cascade, promoting secretion of cytokines and chemokines that recruit immune effectors, thus establishing a state of chronic inflammation.

The implications of this pathological immune activation were particularly pronounced in vivo. Mouse embryos deficient in SPRTN exhibited robust cGAS-STING activation, resulting in pervasive inflammation that persisted into adulthood. The sustained immune assault disproportionately affected vital organs such as the lungs and liver, culminating in premature mortality and phenotypes mimicking accelerated aging. Therapeutic blockade of this immune axis ameliorated many adverse manifestations, underscoring the causal role of inflammation driven by cytoplasmic DNA in the disease process.

These findings reveal that the pathogenic impact of unrepaired DNA-protein crosslinks transcends genomic instability alone, extending to profound systemic inflammatory dysregulation. The chronic inflammatory state provoked by cytoplasmic DNA sensing mechanisms can deleteriously influence organismal longevity. This nexus between impaired DNA repair, innate immune signaling, and aging trajectories represents a paradigm shift in understanding age-associated diseases and genetic disorders marked by genomic maintenance defects.

Prof. Ðikić emphasizes the significance of this conceptual advance, noting that while Ruijs-Aalfs syndrome exemplifies the clinical relevance of defective DPC repair, analogous mechanisms may underpin other rare genetic conditions. The study’s insights lay a critical foundation for devising targeted treatments aimed at modulating the cGAS-STING pathway or enhancing DPC resolution to forestall inflammation-mediated tissue damage.

By leveraging rare disease models, this research not only delineates the molecular underpinnings bridging DNA repair deficiencies to immune activation but also enriches the broader understanding of the biology of aging. Such knowledge may inspire innovative interventions to mitigate age-related pathologies and extend healthspan. The integration of molecular genetics, cell biology, and immunology exemplified here heralds a transformative approach to complex human diseases.

Collaborative efforts spanning prominent institutions—including Goethe University, Johannes Gutenberg University Mainz, the German Cancer Research Center, EPFL Lausanne, Charité Berlin, and others—highlight the interdisciplinary commitment to unraveling fundamental mechanisms of DNA damage response and its systemic ramifications. This collective endeavor exemplifies translational science at its most impactful, promising to translate bench discoveries into clinical breakthroughs.

In sum, the elucidation of SPRTN’s role in managing DNA-protein crosslinks and the consequent immunological sequelae exposes a critical vulnerability in cellular homeostasis that affects organismal lifespan and disease susceptibility. Future research inspired by these findings will likely probe detailed molecular interactions within the cGAS-STING axis and explore pharmacological inhibitors to quell detrimental inflammation without compromising genomic defense.

Subject of Research: Animals

Article Title: DNA-Protein crosslinks promote cGAS-STING-driven premature aging and embryonic lethality

News Publication Date: 30-Jan-2026

Web References: 10.1126/science.adx9445

References: Science Journal, DOI: 10.1126/science.adx9445

Image Credits: Institute of Biochemistry II, Goethe University Frankfurt

Keywords: Genetic disorders, Diseases and disorders, Health and medicine, Cell biology, Cell proliferation, Nuclear localization, Genetics, Human genetics, Molecular genetics, DNA damage, DNA damage responses, DNA repair, DNA replication, Mutation, Loss of function mutations

Cellular senescence, the complex process through which cells irreversibly cease to divide while remaining metabolically active, has gained immense attention for its dual role in physiology and pathology. The senescent phenotype exhibits profound changes, notably the senescence-associated secretory phenotype (SASP), which involves the secretion of pro-inflammatory cytokines, growth factors, and proteases that can alter the tissue microenvironment. This feature, extensively characterized in Campisi’s research, contributes both to tumor suppression and, paradoxically, tissue dysfunction linked to aging and chronic diseases.

This special collection seeks to gather cutting-edge studies elucidating the fundamental molecular triggers that induce senescence, including DNA damage responses, telomere attrition, oxidative stress, and oncogene activation. Further, it emphasizes mechanistic insights into how senescent cells maintain their arrest and modulate their secretory profile in various physiological contexts. These scientific inquiries delve into the signaling pathways such as p53/p21 and p16INK4a/Rb, which orchestrate the senescence program and determine cell fate decisions influential in organismal aging.

Beyond mechanistic studies, the scope extends to the physiological roles of senescent cells, revealing their context-dependent effects. Researchers are invited to submit findings that explore the beneficial roles of senescence in embryonic development, wound healing, and regeneration, juxtaposed with detrimental consequences in chronic inflammation, fibrosis, and tumor microenvironment modulation. This nuanced perspective underscores the intricacy of senescence as a biological phenomenon, pivotal to both healthspan and disease progression.

An additional focal point of the collection is the advancement of biomarkers and innovative tools for the detection and quantification of senescent cells. Accurate identification remains a challenge due to the heterogeneous and dynamic nature of the senescent phenotype. Contributions that present novel imaging techniques, single-cell analyses, and molecular signatures provide critical resources for both basic research and translational applications, facilitating precision medicine approaches in aging-related conditions.

Therapeutic interventions targeting senescent cells represent a rapidly expanding frontier directly inspired by foundational research in this domain. The collection invites submissions on the development and evaluation of senolytics—agents that selectively eliminate senescent cells—and senomorphics, compounds that modulate the SASP without cell death. This line of investigation aims to mitigate the deleterious effects of senescent cells in vivo and translate these findings into clinical therapies for age-related diseases such as osteoarthritis, atherosclerosis, and neurodegeneration.

Importantly, the special issue is guest edited by Han Li and Irina Conboy, internationally recognized leaders in the study of senescence and aging. Their combined expertise spans molecular biology, regenerative medicine, and systemic aging, positioning them perfectly to curate a collection that integrates multidisciplinary perspectives on cellular senescence. Their leadership recommits the field to rigorous, innovative, and impactful research trajectories in honor of Professor Campisi’s enduring legacy.

The submission deadline is set for January 15, 2026. Authors are encouraged to adhere strictly to Aging’s manuscript guidelines outlining formatting, ethical considerations, and original research standards. Each submission will undergo a thorough and rigorous peer-review process ensuring the highest scientific quality and relevance. Researchers worldwide are encouraged to contribute original research, comprehensive reviews, and thought-provoking perspectives that collectively advance the field.

This commemorative call for papers not only serves as a tribute to an extraordinary scientist but also catalyzes a renewed collective effort to decode the complex biology underpinning senescence and its vast implications. It invites the scientific community to push the boundaries of knowledge surrounding the molecular and cellular underpinnings of aging and age-related diseases, potentially unlocking novel paths to enhance human healthspan and longevity.

This initiative also reflects a growing recognition that interventions targeting senescent cells hold promise to redefine aging research from a descriptive to a therapeutic discipline. The research curated under this collection will contribute to a more profound understanding of age-associated pathologies, offering hope for innovative clinical solutions and improved quality of life for aging populations globally.

For more detailed information regarding manuscript submission, interested researchers are directed to the official Aging journal website. The platform also offers extensive resources relating to editorial policies and open-access publishing, enabling a broad dissemination of knowledge. The Aging journal remains committed to fostering open scientific communication and public engagement, with active outreach on multiple social media platforms.

In closing, this commemorative special collection provides a unique opportunity for scientists to honor the memory of Professor Judith Campisi by contributing to a growing body of knowledge that she inspired. It resonates as a call to action for the global aging research community to continue unraveling the complexities of cellular senescence and its manifold effects on health and disease.

Subject of Research: Cellular senescence and its role in aging, cancer, and tissue homeostasis.

Article Title: Call for Papers: Commemorative Collection Honoring Dr. Judith Campisi on Cellular Senescence

News Publication Date: May 1, 2025

Web References:
https://www.aging-us.com/judith-campisi-commemorative-call-for-papers
http://www.aging-us.com/

Image Credits: © 2025 Rapamycin Press LLC dba Impact Journals

Keywords: Cellular senescence, SASP, aging, cancer, tissue homeostasis, senolytics, senomorphics, biomarkers, regenerative medicine, peer review, open access, scientific publishing