Cancer research has long focused on mutations in genes that code for proteins, the molecules that carry out most visible work inside cells, in an effort to explain how healthy cells become malignant. Yet this protein-centered view has left major gaps, including why cancers of the same type often share just few genetic mutations and why many so-called cancer genes also appear in healthy tissues. A new perspective now argues that the key drivers of cancer may lie not in protein-coding genes themselves, but in the vast network of noncoding RNA, genetic material that does not make proteins but regulates how the genome functions.
Dr. Amil Shah from the University of British Columbia presents this view in a comprehensive study published in the peer-reviewed journal Genes. Dr. Shah examines how noncoding RNAs, once dismissed as genomic noise, form an intricate regulatory system that governs gene expression, the process by which genetic information is turned into biological activity, and cell identity. The work proposes that disruptions to this system can shift cells into abnormal, cancer-associated states.
Noncoding RNAs make up the majority of molecules transcribed from chromosomal DNA in human cells and originate from regions of the genome that do not encode proteins. Rather than being inactive, these molecules interact extensively with DNA, messenger RNA, the RNA copies that carry genetic instructions, proteins, and each other. Dr. Shah explains that “ncRNAs comprise a wide variety of molecules that interact with one another as well as with other RNAs, DNA, and proteins, over whose activities they exert a regulatory influence.” Through these interactions, noncoding RNAs help coordinate when genes are switched on or off, and how strongly they are expressed.
A central idea in the study is that cells exist in relatively stable patterns of gene activity, known as attractor states, a concept from systems biology describing preferred configurations that cells naturally settle into. Each normal cell type, such as a liver cell or a nerve cell, corresponds to one of these states. According to Dr. Shah, “the outcome of the dynamic interactions of the cell’s biomolecules is the emergence of higher-order states of equilibrium, called attractor states, which correspond to the gene-expression configurations of distinct cell types.” These states are usually robust, meaning they resist small disturbances, but they can be altered by stronger disruptions such as genetic mutations.
Dr. Shah’s study argues that while minor changes are tolerated, multiple mutations affecting noncoding RNAs can be particularly disruptive because they rewire the regulatory network that maintains cellular balance. Instead of damage through the gradual linear accumulation of mutations in protein-coding genes, alterations in the dynamic interactions of elements of the regulatory noncoding RNA network push the cell along a trajectory into a different attractor state. Dr. Shah notes that “mutations that disrupt the ncRNA network can enable the cell to undergo a state transition towards a potentially neoplastic one,” with neoplastic referring to abnormal growth characteristic of cancer. In this view, cancer represents a transition into an abnormal but stable attractor state rather than simply the result of faulty proteins.
Evidence supporting this idea comes from large cancer genome analyses showing that most genetic variants occur in noncoding regions of DNA, the stretches of genetic material that do not directly specify proteins. These regions give rise to noncoding RNAs, meaning that many cancer-associated mutations likely affect regulatory processes rather than protein structure. Changes in noncoding RNAs can influence transcription, the first step in reading genetic information, messenger RNA stability, which determines how long genetic messages persist, and signaling proteins which promote cell division and even telomere maintenance, the protection of chromosome ends that affects how long cells can divide.
The implications of this framework extend beyond understanding how cancer begins. It also challenges current therapeutic strategies that mainly target proteins produced by mutated genes. While such treatments can be effective, they often fail as tumors adapt or develop resistance. By contrast, targeting noncoding RNAs could allow therapies to intervene earlier in the regulatory cascade, the chain of control events that shapes cell behavior. Dr. Shah suggests that a deeper understanding of these RNA networks could guide the development of new diagnostic tools and treatments that better reflect the complexity of cancer biology.
In summary, Dr. Shah’s study reframes cancer as a disease of disrupted cellular regulation rather than solely one of damaged genes. By placing noncoding RNA at the center of tumor development, it offers an explanation for many longstanding puzzles in oncology and points toward new directions for research and therapy. Understanding how these RNA networks maintain, and sometimes destabilize, cellular identity may be crucial for future advances in cancer prevention and treatment. Dr. Shah concluded: “A large, diverse group of noncoding RNAs form a dynamic regulatory network that controls gene expression and determines cellular identity, but its disruption by mutations steers the cell along a trajectory towards cancer. We have an opportunity to update our assumptions about cancer development to better align with the deeper understanding of how the genome works and with the realities of clinical experience.”
Journal Reference
Shah A., “The Primary Role of Noncoding RNA in the Pathogenesis of Cancer,” Genes, 2025. DOI: https://doi.org/10.3390/genes16070771
About the Author
Dr. Amil Shah received his BSc (Hons) and MD degrees from McGill University, Montreal, and completed his medical oncology fellowship at the University of British Columbia, Vancouver. A Clinical Professor of Medicine at UBC, he practised in Vancouver with a major focus on the management of gastrointestinal malignancies, and was Chair of the Provincial Gastrointestinal Tumor Group at the BC Cancer Agency. He later served as Associate Dean of the Vancouver-Fraser Medical Program at UBC, during which he oversaw the launch of a renewed medical undergraduate curriculum and implemented several measures to improve organizational efficiency. In the past few years, he has been examining the role of the cell’s noncoding RNA regulatory network in the molecular pathogenesis of cancer from a systems biology perspective.
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