CRHR1 rs173365: Understanding Stress Response Genetics
The rs173365 variant is a common genetic change located within the CRHR1 gene, which plays a central role in the body's stress response system. Research has investigated this variant as a potential marker for understanding individual differences in psychiatric outcomes following exposure to trauma.
What each genotype means
Typical stress response profile
This genotype represents the most common version of this variant in many populations. Research into CRHR1 variants suggests they may influence how the body's stress system, specifically the HPA axis, responds to trauma, but this specific genotype is generally considered the baseline for comparison in genetic studies.
This is a common genotype found across diverse global populations.
Varied stress response potential
Carrying one copy of the T allele means your genetic profile for this CRHR1 variant is heterozygous. Some studies suggest that variations in the CRHR1 gene may interact with life experiences to influence stress-related outcomes, though the clinical significance of this specific genotype remains a subject of ongoing research.
This genotype is frequently observed in many populations, reflecting the common nature of the T allele.
Potential stress sensitivity marker
This genotype indicates you carry two copies of the T allele for this variant. Research has investigated whether CRHR1 variants contribute to differences in how individuals process stress or develop stress-related symptoms following trauma, but these findings are often context-dependent and vary by ancestry. This information is for educational purposes and should not be used to predict personal health outcomes.
This genotype is common, with the T allele appearing at a frequency of approximately 37% in many studied populations.
What is rs173365 and Where is it Located?
The variant rs173365 is a single nucleotide polymorphism (SNP) located on chromosome 17 within the CRHR1 gene region. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is categorized as a common polymorphism, meaning it appears frequently across diverse human populations. It sits within the genomic architecture of the CRHR1 gene, which provides instructions for creating the corticotropin-releasing hormone receptor 1 protein. Because this region is involved in regulating how the brain and body perceive and react to stress, researchers often study variants here to see if they contribute to variations in how people handle challenging life events. It is important to note that being a common variant means that having one version or another is a normal part of human genetic diversity, rather than an indicator of a rare disease or condition.
The Role of the CRHR1 Gene
The CRHR1 gene encodes the corticotropin-releasing hormone receptor 1, a protein that acts as a key switch in the body's stress-response system. When the body encounters a stressor, the brain releases corticotropin-releasing hormone, which binds to this receptor. This binding triggers a cascade of physiological events, including the activation of the hypothalamus-pituitary-adrenal (HPA) axis, which ultimately leads to the release of cortisol, the body's primary stress hormone. This system is essential for the 'fight-or-flight' response, helping the body adapt to immediate threats. However, when this system is overactive or dysregulated, it may influence how an individual experiences anxiety or stress-related symptoms. Because CRHR1 is so central to these processes, scientists investigate how genetic variations in this gene might subtly alter the receptor's function or expression, potentially influencing an individual's sensitivity to environmental stressors.
Research Associations and Evidence Strength
The evidence linking rs173365 to psychiatric outcomes is considered moderate and is primarily derived from studies examining gene-environment interactions. Specifically, researchers have looked at whether this variant influences the development of symptoms in individuals who have experienced significant trauma, such as natural disasters. Some studies have observed statistical associations between specific alleles of rs173365 and post-traumatic stress symptoms, suggesting that the variant might act as a moderator for how trauma affects mental health. However, these findings are complex; genetic associations in psychiatry are rarely straightforward and often depend on the specific population studied and the type of trauma experienced. It is crucial to understand that these studies identify correlations in large groups of people, not individual predictions. The scientific community continues to explore these links, but current evidence does not support using this variant as a diagnostic tool for any psychiatric disorder.
What You Can and Cannot Do With This Information
Understanding your genetic variants can be an educational experience, but it is important to maintain realistic expectations regarding what this information means for your health. You cannot use the rs173365 genotype to diagnose yourself with a mental health condition or to predict how you will respond to future stress. Genetic markers are only one small piece of a much larger puzzle that includes your environment, life experiences, and overall health history. If you are concerned about stress, anxiety, or your mental well-being, the most effective approach is to consult with a qualified healthcare professional or a mental health specialist. They can provide personalized support based on your clinical history rather than isolated genetic data. Never make changes to your health regimen or medication based on genetic test results without first discussing them with your doctor or a licensed pharmacist, as they are the only ones qualified to interpret these findings in the context of your total health.
How common is this variant?
The rs173365 variant is common across global populations, with the A and G alleles appearing at significant frequencies in most ancestral groups.
Frequently asked questions
Does having a specific rs173365 genotype mean I will develop PTSD?
No. Genetic variants like rs173365 are not deterministic, meaning they do not cause conditions like PTSD. They are only one of many factors, including environmental and social influences, that contribute to mental health outcomes.
Can I use this SNP to choose the right antidepressant?
There is no current clinical consensus or guideline that uses rs173365 to guide antidepressant selection. Always consult your psychiatrist or pharmacist regarding medication choices, as they rely on established clinical protocols.
Is rs173365 a 'stress gene'?
It is a variant within a gene that helps regulate the body's stress response, but it is not a 'stress gene' in the sense that it dictates your personality or stress levels. It is simply a common variation in the DNA sequence of the CRHR1 gene.
Where can I find more information about my own genetic data?
If you have taken a direct-to-consumer genetic test, you can often download your raw data file and look for specific rsIDs. However, interpreting this data should always be done with the guidance of a genetic counselor or healthcare provider.
Sources & further reading
Educational information only, last refreshed 9/15/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Variant in the corticotropin-releasing hormone receptor 1 gene associated with altered hypothalamic-pituitary-adrenal axis reactivity and stress sensitivity.
HPA-axis modulating variant in CRHR1 that interacts with psychosocial stress exposure to affect emotional reactivity and stress-coping traits.
Polymorphism within the CRHR1 locus tagged to haplotypes modulating cortisol release during the Trier Social Stress Test.
Key intronic polymorphism in the corticotropin-releasing hormone receptor 1 gene that moderates endocrine and emotional vulnerability after exposure to early life trauma.
Variant in the corticotropin-releasing hormone receptor 1 gene that moderates hypothalamic-pituitary-adrenal axis reactivity and vulnerability to stress-induced mood disturbances.
Variant in the corticotropin-releasing hormone receptor 1 gene associated with HPA-axis reactivity.