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RRM1 rs1465952: Understanding Your Genetic Variant

rs1465952
Trait
Moderate evidenceGene: RRM1

The rs1465952 variant is a specific genetic change located within the RRM1 gene. Researchers are currently investigating this variant for its potential role in modulating how an individual's body responds to DNA-damaging chemotherapy treatments.

What each genotype means

C/CModerate attention

Typical RRM1 promoter profile

This genotype represents the common form of the RRM1 promoter region. Research suggests this variant may influence RRM1 gene expression levels, which are being studied for their potential role in how tumors respond to gemcitabine-based chemotherapy. Please discuss any planned chemotherapy regimens and potential treatment responses with your oncologist.

The frequency of this genotype varies by ancestry, but it is generally considered the major allele in most studied populations.

C/AModerate attention

Heterozygous RRM1 promoter profile

Carrying one copy of the A allele at this position may be associated with altered RRM1 gene expression compared to the CC genotype. Studies have investigated whether this variation influences the effectiveness of gemcitabine-based treatments in non-small cell lung cancer, though results remain mixed and inconclusive. Please discuss your specific treatment plan and any concerns regarding chemotherapy efficacy with your healthcare provider.

This heterozygous genotype is found at varying frequencies across global populations, often appearing as a common variation in clinical cohorts.

A/AModerate attention

Alternative RRM1 promoter profile

This genotype involves the A allele at the -37 position of the RRM1 promoter, which has been linked in some research to differences in RRM1 expression levels. While some studies suggest this may correlate with progression-free survival in patients receiving gemcitabine, other clinical data have not found a statistically significant association. You should consult with your oncologist to understand how your genetic profile might be considered alongside other clinical factors in your treatment plan.

This genotype is generally less common than the CC genotype in most populations, though specific frequency data depends on ancestral background.

What is the rs1465952 Variant?

The rs1465952 variant is a single nucleotide polymorphism (SNP) located within the RRM1 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is cataloged in public databases as part of ongoing efforts to map how subtle differences in our genetic code might influence biological processes. Because it is located within a gene that plays a critical role in cellular health, scientists are interested in whether this specific change alters the function or expression of the RRM1 protein. While many SNPs have no observable effect on health, others are studied for their potential to influence how we process medications or respond to environmental stressors. Research into rs1465952 is currently in the exploratory phase, meaning that while it is a subject of scientific interest, its clinical significance is still being determined by the broader research community.

The Role of the RRM1 Gene

The RRM1 gene provides instructions for creating the large, catalytic subunit of an enzyme called ribonucleotide reductase. This enzyme is essential for life because it converts ribonucleotides into deoxyribonucleotides, which are the fundamental building blocks of DNA. By maintaining a steady pool of these building blocks, the RRM1 protein ensures that cells can successfully replicate their DNA during the cell cycle and perform necessary DNA repair processes. Because of its central role in DNA synthesis, RRM1 is a frequent subject of study in oncology. When cells are exposed to DNA-damaging agents, such as certain types of chemotherapy, the activity and expression levels of RRM1 can influence how effectively a cell repairs its DNA or whether it undergoes programmed cell death. Consequently, variations in this gene are often investigated to see if they correlate with differences in how patients respond to specific cancer therapies.

Research Associations and Evidence Strength

Current evidence linking the rs1465952 variant to specific clinical outcomes is considered moderate. Most research involving RRM1 focuses on its expression levels rather than specific SNPs, as high levels of the RRM1 protein have been associated with resistance to certain chemotherapy drugs like gemcitabine in various cancer cell lines. The investigation into rs1465952 specifically looks at whether this genetic variant might modulate the inflammatory response or the efficacy of DNA-damaging treatments. It is important to note that genetic associations are often complex and influenced by many factors, including other genes, lifestyle, and the specific type of treatment being administered. Because the evidence is still evolving, it is not currently used as a standard diagnostic tool in clinical practice. Researchers continue to publish studies to determine if this variant has a statistically significant impact on patient outcomes or if it serves as a useful biomarker for treatment planning.

Population Frequency and Genetic Diversity

Information regarding the specific population frequency of the rs1465952 variant is currently limited in public genomic databases. Genetic variants often show significant differences in frequency across various ancestral groups, which is why large-scale studies are necessary to understand their distribution. Without comprehensive data, it is difficult to determine how common this variant is in the general population or if it is more prevalent in specific ethnic groups. As genomic research expands to include more diverse populations, our understanding of the frequency and impact of variants like rs1465952 will likely improve. For now, the lack of specific frequency data highlights the need for continued, inclusive research to ensure that genetic findings are applicable to all individuals regardless of their background.

What You Can Do With This Information

If you have received information about your rs1465952 genotype, it is important to view it as a piece of scientific data rather than a medical diagnosis. Because the evidence linking this variant to clinical outcomes is still being studied, it should not be used to make decisions about your health or medical treatment. Genetic information is complex, and the presence of a specific variant does not guarantee a particular response to medication. If you are undergoing treatment or have concerns about how your genetics might influence your health, the most important step is to discuss these findings with your clinician or pharmacist. They are best equipped to interpret your genetic results in the context of your overall health history and current treatment plan. Never change or stop any prescribed medication based on genetic test results without consulting your healthcare provider first.

How common is this variant?

Specific population frequency data for the rs1465952 variant is not currently specified in major public genomic catalogs.

Frequently asked questions

Is rs1465952 a diagnostic test for cancer?

No, rs1465952 is not a diagnostic test for cancer. It is a genetic variant being studied for its potential role in how cells respond to certain treatments, but it cannot be used to diagnose or predict the development of cancer.

Should I change my chemotherapy based on this SNP?

Absolutely not. You should never change, stop, or start any medical treatment based on genetic test results without consulting your oncologist or pharmacist. Treatment decisions are based on many clinical factors, and genetic variants are only one small part of the picture.

Where can I find more information about RRM1?

You can find reliable information about the RRM1 gene on resources like MedlinePlus Genetics, GeneCards, or the NCBI Gene database. These sites provide detailed summaries of gene functions and their roles in human health.

Why is the evidence for this variant considered moderate?

Evidence is considered moderate because while there are scientific studies exploring the variant, the results may be preliminary, limited to specific cell types, or not yet validated in large-scale clinical trials. More research is needed to confirm its clinical relevance.

Sources & further reading

Educational information only, last refreshed 10/5/2026. Not medical advice — these associations describe population statistics, not individual predictions.

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