Genetic variant linked to diabetic foot ulcer risk

Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

This article is part of the PlexusDx Education Hub — your resource for evidence-based guidance on Diet & Genetics. Browse all Diet & Genetics education

Diabetic foot ulcers are open sores that develop on the feet of people living with diabetes, affecting roughly 15% of patients over their lifetime. They form when high blood sugar quietly damages nerves and blood vessels, so a small injury heals slowly and can progress to serious complications. Genetics is one factor that helps explain why some people with diabetes are more prone to these wounds than others.

What a diabetic foot ulcer is

An ulcer is a wound that will not close on its own. On the diabetic foot, three problems usually stack up: peripheral neuropathy dulls the pain that would normally warn you of an injury, poor circulation starves tissue of the oxygen it needs to repair, and a blunted immune response makes infection more likely. Warning signs include swelling, redness, warmth, drainage, odor, or darkened skin around a break in the skin.

The genetic variant researchers have flagged

Genes influence how well wounds heal. Research has linked a variant in the MAPK14 gene — which encodes a protein involved in inflammation and tissue repair — to foot-ulcer risk. Carriers of the T allele at rs80028505 showed a 71% higher likelihood of developing a diabetic foot ulcer in that study. MAPK14 is part of the p38 signaling family that coordinates the inflammatory response, so variation here plausibly affects how efficiently damaged skin repairs itself.

Why nerves and circulation drive the risk

Neuropathy and peripheral artery disease are the twin engines behind most ulcers. When you cannot feel a blister from an ill-fitting shoe, it goes unnoticed until it breaks down. When circulation is poor, the body cannot deliver the immune cells and nutrients that close the wound. Uncontrolled blood glucose accelerates both problems, which is why steady glucose management is the foundation of prevention. High glucose also thickens small blood vessels and impairs the white blood cells that fight infection, so a wound that would heal quickly in someone else can linger and deepen. Foot deformities, calluses, and a history of previous ulcers each add to the risk, layering mechanical stress on top of the underlying nerve and circulation problems.

Everyday habits that protect the feet

Daily prevention is practical: inspect both feet every day (a mirror helps for the soles), keep skin clean and moisturized without letting it stay damp between the toes, wear shoes that fit and never go barefoot, and see a provider promptly for any wound that is not healing. These are general, evidence-based habits — not a substitute for the individualized care plan a clinician builds for you.

Where genetic context fits

Knowing you may carry a wound-healing variant does not diagnose or prevent an ulcer, but it can sharpen your motivation to stay consistent with foot care and glucose control. The PlexusDx Precision Peptide Genetic Test examines 14 pathways, 49 peptides, 150+ genetic insights, offering pathway-level context about your biology rather than a diagnosis. PlexusDx tells you about your biology; it does not tell you what to put in your body. Your diabetes care stays with your healthcare team.

Frequently Asked Questions

What gene is linked to diabetic foot ulcer risk?

Research has associated the MAPK14 gene with foot-ulcer risk in people with diabetes. Specifically, the T allele at rs80028505 was tied to a 71% higher likelihood of ulcer development. MAPK14 helps regulate inflammation and tissue repair, so variation may influence how efficiently wounds heal.

Does having the variant mean I will get an ulcer?

No. A genetic variant shifts probability, not destiny. Most diabetic foot ulcers are driven by neuropathy, poor circulation, and blood-sugar control — factors you and your provider can actively manage. Genetics adds context, but consistent foot care and glucose management remain the strongest levers you have.

How are diabetic foot ulcers prevented?

Prevention centers on daily foot inspection, well-fitting footwear, good skin hygiene, steady blood-glucose control, and prompt attention to any wound. A healthcare provider may recommend regular foot exams or specialist footwear. Early detection of small problems is the single most effective way to avoid serious complications.

Can a genetic test treat a foot ulcer?

No. The Precision Peptide Genetic Test is educational and provides pathway-level insight into your biology. It does not diagnose, treat, manage, or prevent diabetic foot ulcers or diabetes. Any ulcer or diabetes management must be handled by a qualified healthcare provider.

Want pathway-level context on how your genes may influence wound-healing and metabolic biology? Explore the PlexusDx Precision Peptide Genetic Test.

This article is part of the PlexusDx Education Hub. Browse all Diet & Genetics education

The Precision Peptide Genetic Test analyzes how your genes influence peptide-related biological pathways. It does not recommend, prescribe, or determine which peptides you should use. Consult a qualified healthcare provider before beginning any peptide protocol.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.