CSF1R rs397515557: What Your Genotype Means
The rs397515557 variant is a specific genetic change located within the CSF1R gene. It has been documented in clinical databases in association with rare, inherited neurodegenerative conditions known as CSF1R-related disorders.
What each genotype means
Typical genetic profile
This is the reference genotype for this position in the CSF1R gene. It is considered the standard sequence found in the majority of the population and is not associated with the pathogenic conditions linked to this variant.
This is the most common genotype observed in the general population.
Heterozygous carrier status
You carry one copy of the variant allele associated with CSF1R-related disorder, a condition that can involve cognitive, psychiatric, or movement-related symptoms. Because this is a rare variant, you should consult with a medical geneticist or your primary care provider to discuss whether this finding has clinical relevance for your personal health history.
This genotype is rare, occurring in a very small fraction of the general population.
Increased risk profile
This genotype involves two copies of the variant allele, which has been documented in clinical databases as pathogenic and linked to hereditary diffuse leukoencephalopathy with spheroids. If you have received this result, it is important to discuss these findings with a qualified healthcare professional or genetic counselor to understand the implications for your health.
This genotype is extremely rare in the general population.
Understanding the Variant and Its Location
The variant rs397515557 is a single nucleotide polymorphism (SNP) situated on chromosome 5 at position 150,056,097. This specific location falls within the CSF1R gene, which provides instructions for creating the colony-stimulating factor 1 receptor protein. In the context of human genetics, SNPs represent the most common type of genetic variation, where a single building block of DNA—a nucleotide—is replaced by another. While many SNPs are harmless, some occur in regions of the genome that are critical for protein function. Because this variant is located within a gene responsible for essential cellular signaling, researchers monitor it closely to understand how it might alter the structure or expression of the resulting protein. It is cataloged in major genomic databases, allowing scientists to track its presence and potential impact across different clinical studies.
The Role of the CSF1R Gene
The CSF1R gene encodes the colony-stimulating factor 1 receptor, a protein that plays a vital role in the development, differentiation, and function of macrophages and microglia. Microglia are the primary immune cells of the central nervous system, acting as the brain's first line of defense. By binding to specific signaling molecules, the CSF1R receptor helps regulate the survival and activity of these cells. When the CSF1R gene functions correctly, it ensures that the brain's immune system can effectively clear debris and maintain healthy neural environments. However, when mutations or significant variants occur in this gene, they can disrupt these signaling pathways. This disruption is linked to a group of conditions collectively known as CSF1R-related disorders, which are characterized by progressive neurological dysfunction, cognitive impairment, and changes in the brain's white matter.
Research Associations and Evidence Strength
Research into rs397515557 has primarily focused on its classification in clinical settings, such as ClinVar, where it has been associated with hereditary diffuse leukoencephalopathy with spheroids (HDLS). This is a rare, adult-onset neurodegenerative condition. The evidence strength for this association is considered moderate, as clinical databases rely on reported cases and functional studies to establish pathogenicity. While the link between certain CSF1R variants and neurodegeneration is well-established in medical literature, the specific clinical impact of any single variant can vary based on the individual's overall genetic background. It is important to note that the presence of a variant does not guarantee the development of a disease. Current research continues to explore how these genetic changes contribute to the spectrum of CSF1R-related disorders, which are often underdiagnosed due to their complex and variable clinical presentations.
Population Frequency
The rs397515557 variant is classified as rare in the general population. Because it is not a common polymorphism, it is not typically found in large numbers within standard population-wide genetic studies, making it a subject of interest primarily in clinical genetics and rare disease research.
What This Information Means for You
If you have encountered this variant in a genetic report, it is essential to understand that this information is for educational purposes and does not constitute a medical diagnosis. Genetic variants in the CSF1R gene are complex, and their clinical significance is often determined by a combination of factors, including family history and specific neurological symptoms. You cannot use this information to predict health outcomes or make medical decisions on your own. If you are concerned about your genetic results or a family history of neurological conditions, the most appropriate step is to consult with a qualified healthcare provider or a genetic counselor. They can help interpret these findings in the context of your personal health and guide you through any necessary clinical evaluations or discussions regarding your medical care.
How common is this variant?
The rs397515557 variant is considered rare across global populations, appearing infrequently in large-scale genomic databases.
Frequently asked questions
What is a CSF1R-related disorder?
CSF1R-related disorders are a group of rare, progressive neurodegenerative conditions caused by variants in the CSF1R gene. They often manifest as cognitive decline, movement disorders, and changes in brain white matter.
Is rs397515557 a common genetic variant?
No, rs397515557 is considered a rare variant. It is not commonly found in the general population compared to more frequent genetic polymorphisms.
Should I be worried if I have this variant?
Finding a variant in a report does not mean you have or will develop a disease. You should discuss any genetic findings with a doctor or genetic counselor who can provide context based on your health history.
Where can I find more information about CSF1R?
You can find reliable information about the CSF1R gene and related conditions through resources like MedlinePlus Genetics, the NCBI Gene database, and peer-reviewed medical journals.
Sources & further reading
Educational information only, last refreshed 10/1/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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