rs191497052: Facial Telangiectasia and Skin Photo-Aging
The genetic variant rs191497052 is a single-nucleotide polymorphism that has been statistically linked to facial telangiectasia and vascular signs of photo-aging. Research in East Asian cohorts suggests that carrying the minor allele may increase the likelihood of developing visible superficial facial blood vessels. However, evidence remains limited and population-specific, meaning it describes statistical predisposition rather than a direct clinical diagnosis.
What each genotype means
Typical vascular aging profile
You carry two copies of the common C allele. In published studies, this baseline genotype is not associated with an increased genetic susceptibility to facial telangiectasia or pronounced vascular photo-aging.
Carried by more than 99% of individuals of European ancestry and roughly 90% to 94% of individuals of East Asian ancestry.
Increased facial telangiectasia likelihood
You carry one copy of the T allele, which was associated with a higher likelihood of visible facial telangiectasia (spider veins) under a dominant genetic model in an East Asian cohort. Because overall scientific evidence remains limited and varies by ancestry, this statistical association does not mean you will definitely develop visible vessels.
Observed in roughly 6% to 10% of East Asian populations, but found in fewer than 1% of individuals of European ancestry.
Increased facial telangiectasia likelihood
You carry two copies of the less common T allele, which has been linked to increased facial spider veins and vascular photo-aging features under a dominant inheritance model. This finding is based on limited evidence from East Asian studies and has not been established as a causal factor across all ancestries.
Very rare across all ancestries, occurring in well under 1% of individuals worldwide, including East Asian populations.
Genomic Context and Variant Identity
The single-nucleotide polymorphism rs191497052 represents a specific position in the human genome cataloged in dbSNP. In genetic association studies, rs191497052 has often been mapped or tagged to chromosomal regions housing genes such as KIDINS220 or nearby loci like TPO on chromosome 2. A single-nucleotide polymorphism occurs when a single nucleotide base differs among individuals in a population. While many variants fall into non-coding regions that may regulate the expression of nearby genes, others serve primarily as genomic tag markers in linkage disequilibrium with causal functional changes. Because rs191497052 is cataloged in public genomics resources as a marker evaluated in dermatological trait studies, researchers track its specific allele substitutions to understand structural variations that influence individual physical differences, including how facial microvasculature responds over time to external environmental factors such as sunlight.
Biological Mechanisms and Related Genes
Genome-wide scans analyzing cutaneous traits evaluate markers in complex genomic regions. The variant rs191497052 tags genomic loci that have been discussed in the context of KIDINS220 (Kinase D-interacting substrate of 220 kDa) and nearby genomic landmarks like TPO (Thyroid Peroxidase). KIDINS220 plays vital roles in intracellular signaling cascades, neural development, and vascular cell regulation, whereas TPO encodes a well-characterized enzyme essential for thyroid hormone synthesis. Although TPO is primarily expressed in thyroid tissue and implicated in endocrine health, genetic markers identified in broad screening studies often act as regulatory switches or markers of broader linkage blocks. Cellular integrity, vessel wall support, and local inflammatory signaling all influence cutaneous blood vessel dilation. Genetic variation across these loci may alter localized microvascular resilience, potentially modulating how microvessels in the upper dermis remodel under repeated environmental exposures.
Scientific Evidence for Facial Telangiectasia
Facial telangiectasias, commonly known as spider veins or broken capillaries, are dilated superficial blood vessels that often arise as a prominent vascular feature of facial photo-aging. A genome-wide association study examining skin aging traits in over 1,500 Han Chinese women identified rs191497052 as significantly associated with increased facial telangiectasia under a dominant genetic model. Carrying at least one copy of the effect allele was correlated with higher scores of visible vascular aging. Despite this statistical correlation, overall scientific evidence remains classified as limited. Follow-up research, including investigations in European cohorts like the Rotterdam Study, highlights that genetic influences on facial telangiectasia can differ substantially across ancestries. In addition, lifestyle and environmental drivers, such as cumulative lifetime ultraviolet radiation exposure, smoking, and age, exert massive independent effects on the condition.
Understanding Lifestyle and Dermatological Care
A statistical genetic association does not equal a clinical prognosis or a medical diagnosis of rosacea, telangiectasia, or skin pathology. Finding that you carry an associated genotype simply reflects a slight probabilistic variation detected in population cohorts. Genetics represents only one component of dermatological health, often interacting heavily with environmental factors. Telangiectasia development is heavily accelerated by chronic sun exposure, temperature extremes, alcohol consumption, and systemic vascular factors. Standard photoprotection practices—such as broad-spectrum sunscreen use, protective clothing, and gentle skincare regimens—remain the primary methods for supporting skin health and mitigating vascular aging regardless of genotype. If you are concerned about persistent facial redness or dilated microvessels, a board-certified dermatologist can offer clinical assessments and standard treatment options such as pulsed dye or vascular laser therapies.
How common is this variant?
The minor allele for rs191497052 has an estimated frequency of approximately 0.03 to 0.05 in East Asian populations, whereas it is rare in European populations, where its allele frequency is generally below 0.01.
Frequently asked questions
What is facial telangiectasia?
Facial telangiectasia refers to permanently widened, visible small blood vessels or capillaries close to the surface of the skin, often appearing on the cheeks and nose. While they are a common feature of natural and photo-induced skin aging, they can also occur alongside conditions like rosacea.
Does having the rs191497052 variant guarantee I will develop broken capillaries?
No, genetics only influences relative risk and susceptibility. External factors like cumulative ultraviolet (UV) radiation from sunlight, aging, lifestyle choices, and general skin type play a major role in whether visible capillaries develop.
Can I prevent telangiectasias if I carry the variant allele?
While genetic predispositions cannot be altered, the environmental triggers that accelerate facial vascular dilation can be managed. Consistent daily application of broad-spectrum sunscreen, wearing wide-brimmed hats, avoiding harsh facial scrubs, and minimizing exposure to extreme weather can help protect delicate facial vessels.
Is rs191497052 linked to thyroid disorders?
Although some genomic catalogs map the marker adjacent to the TPO (Thyroid Peroxidase) gene, the specific association research for rs191497052 focuses on dermatological and vascular aging phenotypes. There is no conclusive clinical evidence directly tying this specific variant to thyroid dysfunction.
Sources & further reading
Educational information only, last refreshed 9/12/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs191497052?
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 — $29