HNF1A rs7957197: What Your Genotype Means
The rs7957197 variant is a genetic marker located within the HNF1A gene. It has been identified in large-scale studies as a susceptibility locus associated with an increased risk of gestational diabetes mellitus (GDM).
What each genotype means
Typical gestational diabetes risk
This genotype is considered the baseline for this variant. While this locus is linked to gestational diabetes mellitus susceptibility, the overall evidence remains limited and requires further validation across diverse populations.
This is a common genotype in populations of European ancestry.
Potential diabetes susceptibility
This genotype is associated with a potential increase in susceptibility to gestational diabetes mellitus. Because the evidence is limited, this result should be viewed as a statistical association rather than a diagnostic indicator.
This genotype is frequently observed in European-derived cohorts.
Potential diabetes susceptibility
This genotype is associated with a potential increase in susceptibility to gestational diabetes mellitus. Because the evidence is limited, this result should be viewed as a statistical association rather than a diagnostic indicator.
This genotype is observed in European-derived cohorts.
Understanding the Variant and Its Location
The rs7957197 variant is a single nucleotide polymorphism (SNP) situated within the HNF1A gene. This gene is located on chromosome 12 and encodes the hepatocyte nuclear factor 1-alpha protein. This protein acts as a transcription factor, which is a type of protein that controls the activity of other genes. Transcription factors are essential for regulating the expression of genes involved in various metabolic processes, including those in the liver, kidneys, and the pancreas. Because HNF1A plays a critical role in the development and function of pancreatic beta cells—the cells responsible for producing insulin—variations in this gene are frequently studied in the context of glucose metabolism and diabetes research.
Research Associations and Evidence Strength
Research into rs7957197 has primarily focused on its role in glucose regulation. Large-scale case-control studies have identified this variant as a susceptibility locus for gestational diabetes mellitus (GDM). While these associations are statistically significant in the populations studied, the evidence strength is considered limited. This means that while the variant is linked to a higher risk, it is not a direct cause of the condition on its own. Other studies have explored whether this variant influences how individuals respond to specific dietary interventions, such as high-fat diets, in the context of weight loss and insulin resistance. These findings suggest that genetic background may interact with lifestyle factors, though results can vary based on study duration and population characteristics.
What This Information Means for You
It is important to understand that having a specific genotype for rs7957197 does not mean you will develop gestational diabetes or any other condition. Genetic associations are statistical observations across large groups of people and cannot predict individual health outcomes. Many factors, including diet, physical activity, age, and overall health history, play a much larger role in metabolic health than any single SNP. You cannot use this information to diagnose yourself or make medical decisions. If you are concerned about your risk for diabetes or are planning a pregnancy, the best course of action is to consult with your healthcare provider. They can provide personalized guidance based on your clinical history and current health status rather than relying on individual genetic markers.
How common is this variant?
The rs7957197 variant is commonly studied in European-derived cohorts, where the frequency of the alleles varies. Specific population frequencies can be found in databases like gnomAD.
Frequently asked questions
Does having the T allele mean I will get gestational diabetes?
No. This variant is only one of many factors that contribute to risk. Most people with this variant do not develop gestational diabetes, and many people without it do.
Can I use this SNP to change my diet?
While some research suggests potential interactions between this gene and diet, these findings are preliminary. You should not change your diet based on a single genetic result; consult a registered dietitian or doctor.
Is HNF1A related to MODY diabetes?
Yes, mutations in the HNF1A gene are a known cause of a specific form of monogenic diabetes called MODY3. However, the common variant rs7957197 is distinct from the rare, highly penetrant mutations that cause MODY.
Where can I find more information on this SNP?
You can search for rs7957197 on the NCBI dbSNP database or the GWAS Catalog to see the latest research publications and population data.
Sources & further reading
Educational information only, last refreshed 11/4/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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A rare variant in the HNF1A gene associated with maturity-onset diabetes of the young type 3 (MODY3).
Associated with variation in circulating high-sensitivity C-reactive protein (hsCRP) levels and glycemic traits.
A common missense variant (p.Ile27Leu) in HNF1A associated with modest alterations in high-sensitivity C-reactive protein levels and susceptibility to dysregulated glucose homeostasis.
Missense variant (p.Ile27Leu) in HNF1A linked to high-sensitivity C-reactive protein levels.