FARP2 rs757978: What Your Genotype Means
The rs757978 variant is a non-synonymous single nucleotide polymorphism (nsSNP) located in the FARP2 gene. Current genomic research moderately associates this specific genetic change with an elevated susceptibility to certain cancers, likely due to its impact on cellular structure and protein interactions.
What each genotype means
Increased cancer susceptibility risk
This genotype is associated with an increased statistical risk for certain cancers, including chronic lymphocytic leukemia. Because this variant may also influence response to medications like methylphenidate, please discuss any treatment plans or dosing concerns with your clinician or pharmacist.
Carried by a minority of the population, with frequency varying significantly across different global ancestries.
Moderate cancer susceptibility risk
This genotype represents a heterozygous state that may be associated with a moderate influence on cancer susceptibility compared to the homozygous risk state. As this variant is also linked to potential differences in medication response, such as to methylphenidate, you should consult your healthcare provider regarding any clinical implications.
This is a relatively common genotype observed across various populations, though exact prevalence depends on ancestral background.
Baseline risk profile
This genotype is generally considered the baseline or reference state in the context of the studied cancer susceptibility associations. If you are taking medications such as methylphenidate, please note that genetic factors can influence drug response and you should discuss your treatment with your doctor.
This is the most common genotype for this variant in many global populations.
What is rs757978 and the FARP2 Gene?
The rs757978 variant is a single nucleotide polymorphism (SNP) situated within the FARP2 gene on chromosome 2. A SNP represents a single-letter change in the DNA sequence. In the case of rs757978, it is classified as a non-synonymous variant, meaning the DNA alteration leads to a change in the amino acid building blocks of the resulting protein. The FARP2 gene encodes a multidomain protein that functions as a guanine nucleotide exchange factor (GEF). This protein plays a critical role in activating RAC1 and Rho GTPases, which are essential molecular switches that regulate cytoskeletal reorganization, cell adhesion, and cell migration. Because these cellular processes are fundamental to how cells grow, move, and interact with their environment, variations in the FARP2 gene can potentially influence a wide range of biological functions, including neuron remodeling and immune system responses.
Research and Cancer Susceptibility Associations
Scientific investigations have explored the relationship between the rs757978 variant and cancer risk. A 2021 bioinformatics study analyzing whole-genome sequences identified rs757978 as a potentially damaging pathogenic variant associated with increased cancer susceptibility. Researchers suggest that this specific mutation may alter critical protein interfaces, thereby disrupting normal cellular signaling pathways. Furthermore, earlier studies have noted that FARP2 is an important regulator of MYC gene activity, a well-known oncogene involved in cell cycle progression and transformation. While these findings highlight a biological mechanism by which rs757978 could influence tumor development, the overall evidence strength remains moderate. Genome-wide association studies (GWAS) often reveal that individual SNPs like rs757978 confer only small to moderate increases in relative risk. Therefore, carrying a risk-associated version of this variant is just one piece of a highly complex puzzle involving multiple genes, environmental factors, and lifestyle choices.
Population Frequency and Actionability
The frequency of the rs757978 variant varies across different global populations, though specific prevalence rates can differ significantly depending on ancestry. For instance, some studies examining chronic lymphocytic leukemia (CLL) patients found no statistically significant difference in the allele frequency of rs757978 between African American and white populations, though broader population-level data remains variable. It is crucial to understand what you can and cannot do with this genetic information. Because rs757978 is only moderately associated with cancer susceptibility, a genetic test revealing a risk genotype is not a cancer diagnosis, nor does it guarantee that a malignancy will develop. Consumers should view this information as educational rather than medical. If you have a family history of cancer or concerns about your genetic susceptibility, you should discuss your genetic profile with a licensed genetic counselor or a healthcare provider who can offer personalized clinical guidance.
How common is this variant?
The population frequency for rs757978 is highly variable across different ancestries. While comprehensive global allele frequencies are still being cataloged, targeted studies have noted that its prevalence does not always statistically differ between specific groups, such as African American and white cohorts in certain leukemia studies.
Frequently asked questions
What is the FARP2 gene?
The FARP2 gene provides instructions for making a protein that regulates the cell's internal skeleton, helping cells move and maintain their shape. It acts as a molecular switch by activating other proteins like RAC1 and Rho GTPases.
Does having the rs757978 variant mean I will get cancer?
No. While research moderately links this variant to elevated cancer susceptibility, it is not a diagnosis and does not guarantee you will develop cancer. Cancer is a complex disease caused by a combination of many genetic and environmental factors.
What does a non-synonymous SNP mean?
A non-synonymous SNP is a single-letter change in your DNA that alters the amino acid sequence of the resulting protein. For rs757978, this change is thought to affect how the FARP2 protein interacts with other molecules in the cell.
Can I change my genetic risk for this variant?
You cannot change your DNA, but genetic variants only represent a portion of your overall health risk. Maintaining a healthy lifestyle, following standard cancer screening guidelines, and consulting with a doctor are the best ways to manage your well-being.
Why is the evidence for this variant considered moderate?
The evidence is moderate because while bioinformatics and some association studies flag rs757978 as potentially damaging, large-scale clinical consensus is still evolving. Individual genetic variants typically have a small effect size, meaning more research is needed to fully understand their impact.
Sources & further reading
Educational information only, last refreshed 9/4/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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