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Wednesday, December 10, 2025
Sherlock-Lung study researchers use large-scale multi-omics analysis to identify biomarker of aggressive lung tumors.
Using lung cancer biospecimens from the Sherlock-Lung study, an international team led by National Institutes of Health (NIH) researchers, identified key factors that drive tumor evolution and influence outcomes. Overall, the findings, published Dec. 10, 2025, in Nature, describe a previously unknown origin of some aggressive lung cancers.
From whole-genome sequencing of more than 1,000 lung cancer cases, the team focused on 542 lung adenocarcinomas with diverse clonal architectures. Among them were a collection of aggressive tumors enriched with the ID2 mutational signature, characterized by a single base pair deletion. Surprisingly, this signature was associated with a type of mobile DNA known as LINE-1 (L1), an ancient part of the human genome that has the potential to wreak havoc by inserting many copies of itself in different places across the genome. L1 is typically silenced within a normal cell but in these tumors was reactivated. L1 reactivation could explain the rapid evolution and aggressiveness of this subgroup.
“It’s not every day that you discover a new mechanism for aggressive lung tumors,” said lead author Dr. Tongwu Zhang, Ph.D., Earl Stadtman investigator at NIH’s National Cancer Institute (NCI). “The finding underscores the power of whole-genome sequencing data to reveal genomic structural variants with significance for tumorigenesis.”
In addition, the investigators discovered that major driver gene mutations are responsible for varying tumor evolutionary trajectories. Tumors harboring KRAS mutations, which are more frequent in smokers, showed signs of rapid clonal evolution, which helps to explain the aggressive nature of these malignancies. In contrast, tumors enriched with EGFR mutations—more common in people who never smoked—had more sub-clonal architecture, which explains a more prolonged evolutionary course.
“The slow progression of EGFR-mutant tumors may allow for early detection and benefit from combination treatments to delay or prevent resistance,” said Maria Teresa Landi, M.D., Ph.D., senior investigator, NCI and manuscript’s senior author. “KRAS-mutant tumors and tumors enriched with the ID2 signature, which evolve quickly, may require more targeted approaches.”
This analysis was led by NIH/NCI, in collaboration with researchers from the Istituto Nazionale di Ricovero e Cura per Anziani (INRCA), Ancona, Italy; the University of Manchester, United Kingdom; Harvard University; the University of California San Diego; the University of Chicago; and over 40 additional international research centers.
About the National Cancer Institute (NCI): NCI leads the National Cancer Program and NIH’s efforts to dramatically reduce the prevalence of cancer and improve the lives of people with cancer. NCI supports a wide range of cancer research and training extramurally through grants and contracts. NCI’s intramural research program conducts innovative, transdisciplinary basic, translational, clinical, and epidemiological research on the causes of cancer, avenues for prevention, risk prediction, early detection, and treatment, including research at the NIH Clinical Center—the world’s largest research hospital. For more information about cancer, please visit the NCI website at https://www.cancer.gov.
About the National Institutes of Health (NIH): NIH, the nation’s medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit www.nih.gov.
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Zhang T, et al. Uncovering the role of LINE-1 in the evolution of lung adenocarcinoma. Nature. 2025. DOI: 10.1038/s41586-025-09825-y. https://www.nature.com/articles/s41586-025-09825-y
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