NECTIN2 rs519825: Longevity and Healthspan Genetics
The rs519825 variant is a common single nucleotide polymorphism located in the NECTIN2 gene on chromosome 19. Situated within the well-studied APOE-TOMM40-NECTIN2 genomic region, it has been statistically associated in candidate-gene studies with human longevity and extended healthspan. Because this genomic locus exhibits complex patterns of linkage disequilibrium, scientists continue to investigate whether rs519825 acts independently or tags broader regional variation.
What each genotype means
Typical longevity baseline
You carry two copies of the C allele at this locus in NECTIN2. This genotype represents the standard baseline profile and is not associated with the modest longevity or extended healthspan advantages linked to the minor T allele in observational studies. Because this locus resides within the complex APOE cluster, overall longevity is shaped by many genetic factors as well as lifestyle, environment, and healthcare.
Carried by approximately 50% of individuals of European ancestry and about 55% of East Asian populations.
Moderate longevity advantage
You carry one copy of the T allele associated with enhanced survival to advanced age and extended healthspan. Research suggests this statistical association operates largely independently of the neighboring APOE epsilon 4 allele, though the overall biological effect size is modest. Having this genotype does not guarantee extended longevity or prevent age-related diseases, as lifespan is influenced by multiple interacting genes and lifestyle factors.
Carried by roughly 40% to 42% of European and around 38% of East Asian individuals.
Enhanced longevity profile
You carry two copies of the T allele at this locus, which has been linked in genetic association studies to increased odds of reaching advanced age. This signal within NECTIN2 is observed independently of APOE epsilon 4, although scientific evidence for direct causality remains limited and emerging. This genotype is not a diagnostic marker or a guarantee of healthy aging, as overall lifespan is predominantly guided by broader genetic, lifestyle, and environmental components.
Carried by approximately 8% to 9% of people of European descent and roughly 7% of individuals of East Asian ancestry.
Genomic Location and Variant Context
The single nucleotide polymorphism rs519825 is located within the NECTIN2 gene (historically referred to as PVRL2) on the long arm of human chromosome 19 (19q13.32). This specific stretch of DNA is one of the most extensively studied regions in human complex disease genetics due to its proximity to the APOE and TOMM40 gene cluster. Genetic variations here often travel together across generations in haplotype blocks, making it vital for researchers to untangle whether single nucleotide changes exert independent biological effects or merely tag neighboring risk or protective alleles. The alleles observed at rs519825 in human populations are C and T. In modern functional and association studies, researchers evaluate rs519825 both on its own and in combination with adjacent lipid- and neurodegenerative-related markers to understand its distinct contribution to phenotypic aging.
Function of the NECTIN2 Gene
The NECTIN2 gene encodes nectin cell adhesion molecule 2, a single-pass transmembrane glycoprotein belonging to the immunoglobulin superfamily. Structurally, Nectin-2 localizes to adherens junctions, where it participates in calcium-independent cell-cell adhesion by interacting with other nectin molecules or related surface proteins. Beyond its structural role in maintaining the integrity of endothelial and epithelial cell barriers, Nectin-2 functions as an immune modulator. It can bind to regulatory receptors on T cells and natural killer (NK) cells, acting either as a costimulatory or coinhibitory signal depending on the specific receptor it engages, such as CD226 or TIGIT. By regulating intercellular junctions, vascular integrity, and cellular immune activation, NECTIN2 participates in fundamental pathways that influence vascular health, tissue maintenance, and systemic inflammation—biological processes closely aligned with aging and resilience.
Association with Longevity and Evidence Strength
Genetic association studies focused on extreme survival and healthy aging have evaluated rs519825 as a potential contributor to human longevity. In multiple replication cohorts and aging-focused candidate analyses, the minor T allele of rs519825 has demonstrated statistical associations with extended healthspan and survival into advanced age. Notably, some investigations have reported that this signal appears partly independent of the classical APOE epsilon 4 allele, which is well known for predisposing individuals to cardiovascular and neurodegenerative decline. However, the evidence supporting rs519825 remains categorized as limited. While significant in several targeted cohorts, rs519825 does not routinely reach modern, rigorous thresholds of genome-wide significance in large-scale agnostic meta-analyses of lifespan. Instead, it appears to represent a modest-effect contributor among a polygenic network of common variants shaping healthy aging.
Population Patterns and Linkage Disequilibrium
The rs519825 variant is common across diverse human ancestries. In East Asian populations, the minor allele frequency is approximately 0.26, while in European ancestral populations, it occurs at roughly 0.29. Because chromosome 19q13.32 contains strong and variable linkage disequilibrium across different ethnic groups, the degree to which rs519825 correlates with variations in APOE and TOMM40 can vary significantly by ancestral background. This geographic and ancestral diversity highlights why genetic association signals discovered in one cohort cannot automatically be generalized to another. Large population databases, including gnomAD, demonstrate that common variations like rs519825 are standard components of human genomic architecture rather than deleterious mutations, reflecting natural, widespread variation throughout human evolutionary history.
Clinical Realities: What This Variant Does and Does Not Mean
Understanding an rs519825 genotype provides educational insight into genomic variation, but it does not represent a clinical diagnosis or a deterministic forecast of your lifespan. Exceptional longevity and overall healthspan are complex multifactorial traits governed by hundreds of minor genetic variants working in concert with environmental exposures, nutrition, exercise, sleep, and medical care. Possessing a favorable genotype at rs519825 does not guarantee immunity from age-related diseases, nor does an alternate genotype prevent a person from reaching a healthy, advanced age. Genetic tests reporting on this marker are intended solely for personal informational and educational exploration, and lifestyle choices remain the most actionable and proven drivers of lifelong physical and cognitive health.
How common is this variant?
The minor T allele of rs519825 is common globally, with an observed frequency of approximately 0.26 in East Asian populations and roughly 0.29 in populations of European ancestry.
Frequently asked questions
What is the rs519825 variant?
The rs519825 marker is a common single nucleotide polymorphism located in the NECTIN2 gene on human chromosome 19. It has been evaluated in genetic research for its potential role in healthy aging and longevity.
Does having the rs519825 T allele guarantee a long life?
No. Human lifespan is a complex trait influenced by many genes, environment, and daily lifestyle habits. Carrying an allele statistically associated with longevity only reflects a slight population-level correlation, not an individual guarantee.
Is NECTIN2 connected to the APOE gene?
Yes, NECTIN2 is situated directly adjacent to the APOE and TOMM40 genes on chromosome 19. Because these genes sit in a tightly linked cluster, genetic changes in NECTIN2 are often studied to determine whether their effects are independent of the well-known APOE epsilon alleles.
Can rs519825 be used to diagnose or predict diseases?
No. The rs519825 variant is not a diagnostic test for any disease, nor is it used in clinical practice. It is primarily studied by researchers aiming to understand the underlying cellular pathways involved in biological aging.
Sources & further reading
Educational information only, last refreshed 9/11/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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