ADAM33 rs2280091: Understanding Asthma-Associated Genetic Variants
The rs2280091 variant is a specific genetic change located within the ADAM33 gene, which has been extensively studied for its potential role in asthma susceptibility. Research suggests this variant may be part of a broader genetic profile that influences airway health and bronchial responsiveness.
What each genotype means
Baseline asthma risk
This genotype is considered the reference or baseline state in many studies investigating asthma susceptibility. Research suggests that individuals with this genotype do not carry the specific risk-associated allele identified in various populations. Please note that asthma is a complex condition influenced by many genetic and environmental factors.
Frequency varies significantly by ancestry, but this genotype is commonly observed in healthy control groups across multiple studied populations.
Increased asthma susceptibility
Carrying one copy of the G allele has been associated with an increased risk of asthma and bronchial hyperresponsiveness in several studies. This variant in the ADAM33 gene may influence airway remodeling, though the clinical impact varies by individual and population. Discuss any respiratory concerns with your healthcare provider.
This genotype is found at varying frequencies globally and has been identified as more prevalent in certain cohorts of children and adults diagnosed with asthma.
Elevated asthma risk profile
This genotype is associated with a higher statistical likelihood of asthma susceptibility and potential severity in some research populations. The ADAM33 gene plays a role in airway smooth muscle function, and this specific variant may contribute to altered airway responses. As asthma is multifactorial, this result should be discussed in the context of your overall health with a clinician.
This genotype is less common than the A/A genotype in many populations but is frequently overrepresented in groups diagnosed with asthma compared to healthy controls.
What is the rs2280091 Variant?
The rs2280091 variant is a single nucleotide polymorphism (SNP) located within the ADAM33 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant has been identified by researchers investigating the genetic architecture of complex respiratory conditions. Because asthma is a multifactorial disease—meaning it is influenced by a combination of many different genes and environmental factors—rs2280091 is considered one of many potential contributors rather than a sole cause. Scientists track these variants to better understand how subtle differences in our genetic code might predispose certain individuals to airway inflammation or structural changes in the lungs over time.
The Role of the ADAM33 Gene
The ADAM33 gene encodes a protein known as a disintegrin and metalloproteinase 33. This protein is a type I transmembrane protein, meaning it sits on the surface of cells and plays a role in cell-to-cell signaling and structural integrity. ADAM33 is primarily expressed in mesenchymal cells, such as fibroblasts and smooth muscle cells, which are critical components of the airway structure. Research indicates that ADAM33 is involved in processes like airway remodeling—the structural changes that occur in the lungs of people with chronic asthma. By influencing how these cells behave, the ADAM33 protein may contribute to bronchial hyperresponsiveness, a hallmark of asthma where the airways narrow too easily in response to triggers like allergens, cold air, or exercise.
Research and Evidence Strength
The evidence linking ADAM33 variants, including rs2280091, to asthma is considered moderate and complex. Since the initial discovery of ADAM33 as an asthma-susceptibility gene in 2002, numerous studies have attempted to replicate these findings across diverse ethnic groups. While some studies have found significant associations between this variant and asthma severity or lung function decline in populations such as Caucasian, African American, and certain Asian cohorts, other studies have reported inconsistent results. This variability is common in complex disease genetics, as the impact of a single SNP can be masked by other genetic modifiers or environmental exposures. Consequently, while rs2280091 is a recognized marker in the literature, it is not used as a definitive diagnostic tool for asthma in clinical practice.
Population Frequency and Variability
The frequency of the rs2280091 variant varies significantly across different global populations. Genetic studies have shown that the association between this SNP and asthma is not universal, appearing in some ethnic groups but not others. For instance, while some research has identified the variant as a risk factor in specific populations like Iraqi Arabs or various Caucasian cohorts, other studies in different regions have failed to find a statistically significant link. This lack of consistency highlights the importance of ancestry in genetic research. Because the prevalence of the alleles associated with rs2280091 differs by geographic and ancestral background, the potential influence of this variant on an individual's health is highly dependent on their specific genetic context.
What This Information Means for You
It is important to understand that having a specific genotype at the rs2280091 position does not mean an individual will develop asthma, nor does the absence of the variant guarantee protection. Asthma is a complex condition driven by a wide array of genetic and environmental interactions. Genetic information regarding this variant is currently used primarily for research purposes to map the biological pathways of respiratory disease. If you are concerned about asthma symptoms, such as wheezing, shortness of breath, or chest tightness, you should consult a healthcare professional. They can provide a clinical evaluation based on your medical history, physical exams, and lung function tests. Never use genetic data to make medical decisions or alter your treatment plan without first discussing it with your doctor or a qualified pharmacist.
How common is this variant?
The frequency of the rs2280091 alleles varies significantly across global populations, with research indicating that its association with asthma is highly ancestry-dependent.
Frequently asked questions
Does having the rs2280091 variant mean I have asthma?
No. Genetic variants like rs2280091 are only one small piece of a very complex puzzle. Asthma is caused by many different genes interacting with environmental factors, and this variant is not a diagnostic test for the condition.
Can I use this genetic information to prevent asthma?
Currently, there is no clinical way to use this specific genetic information to prevent asthma. Asthma management focuses on avoiding known triggers and using prescribed medications to control inflammation and airway responsiveness.
Why do some studies say this gene is important and others do not?
This is common in genetic research for complex diseases. Differences in study results often occur because of variations in the ancestral backgrounds of the participants, different environmental exposures, and the complex way multiple genes work together.
Should I get tested for the ADAM33 gene?
There is no clinical recommendation to get tested for ADAM33 variants. If you are experiencing respiratory symptoms, the best course of action is to see a doctor for a standard clinical evaluation, which is far more accurate than genetic testing for diagnosing asthma.
Sources & further reading
Educational information only, last refreshed 9/23/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs2280091?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in ADAM33
Intronic susceptibility variant in the metalloproteinase ADAM33 gene associated with allergic hyperresponsiveness and atopic airway remodeling.
Noncoding functional polymorphism in the asthma and allergy risk gene ADAM33 linked to altered bronchial reactivity and atopic susceptibility.
This variant is part of a haplotype associated with increased risk of asthma in patient populations.
This variant is part of a haplotype in the ADAM33 gene that shows significant association with asthma susceptibility and IgE levels in specific patient populations.