Type 2 Diabetes & MODY — up to 80% of monogenic diabetes (MODY) is misdiagnosed as type 1 or type 2, leading to inappropriate insulin therapy when some forms require no treatment at all and others respond better to a simple sulfonylurea pill.
Whole genome sequencing identifies all 14+ MODY genes — GCK, HNF1A, HNF4A, HNF1B, and others — plus evaluates type 2 diabetes polygenic risk score, providing the complete genetic diabetes evaluation that distinguishes monogenic from polygenic diabetes.
Type 2 Diabetes & MODY — Genetic Testing
Maturity-onset diabetes of the young (MODY) is a group of monogenic diabetes subtypes caused by single-gene variants affecting β-cell function. MODY accounts for approximately 1-2% of all diabetes — but up to 80% of MODY cases are misdiagnosed as type 1 or type 2 diabetes because MODY shares clinical features with both. MODY should be suspected in diabetes with onset before age 35, negative islet autoantibodies, preserved C-peptide, and/or a strong family history of non-insulin-dependent diabetes across three or more generations (autosomal dominant inheritance with high penetrance).
The MODY gene determines treatment. GCK-MODY (MODY2, ~30% of MODY) causes mild, stable fasting hyperglycemia (typically HbA1c 5.6-7.6%) that does NOT progress, does NOT cause microvascular complications, and does NOT require treatment in most circumstances — insulin and oral hypoglycemics are unnecessary and inappropriate. HNF1A-MODY (MODY3, ~40% of MODY) and HNF4A-MODY (MODY1) respond exquisitely to low-dose sulfonylureas — patients can often discontinue insulin entirely when the correct diagnosis is made. HNF1B-MODY (MODY5) causes diabetes plus renal cysts and requires different management.
Type 2 diabetes is polygenic with approximately 40-70% heritability. Genome-wide association studies have identified >400 common variants contributing to T2D risk, including TCF7L2 (the strongest common variant), KCNJ11, PPARG, SLC30A8, and many others. Polygenic risk scores combining hundreds of variants can stratify T2D risk with clinical utility — particularly in young adults where early risk identification enables preventive lifestyle intervention before diabetes onset. WGS captures both monogenic MODY evaluation and polygenic T2D risk assessment in a single test.
GCK-MODY patients often receive DECADES of unnecessary insulin injections before the correct diagnosis is made. GCK-MODY hyperglycemia is stable, non-progressive, and does not cause complications — treatment is not needed. The correct diagnosis eliminates unnecessary therapy.
80% of MODY is misdiagnosed. Correct diagnosis eliminates unnecessary insulin (GCK-MODY) or switches from insulin to a simple pill (HNF1A-MODY). The annual cost savings per patient can be $10,000+ with improved glycemic control.
Misdiagnosed GCK-MODY patients receive decades of unnecessary insulin — correct diagnosis eliminates all diabetes medications
GCK (glucokinase) functions as the pancreatic glucose sensor. GCK-MODY resets the fasting glucose setpoint ~1-2 mmol/L above normal — producing stable mild hyperglycemia from birth. This hyperglycemia does NOT progress, does NOT cause retinopathy/nephropathy/neuropathy, and does NOT respond to insulin or metformin (because the glucose setpoint is simply reset, not dysregulated). Patients diagnosed with T2D based on elevated fasting glucose who actually have GCK-MODY are taking medications they don't need, with side effects (hypoglycemia from insulin) for a condition that requires no treatment.
HNF1A-MODY patients on insulin can often switch to sulfonylureas with better control — molecular diagnosis transforms management
HNF1A-MODY (the most common MODY subtype) produces progressive β-cell dysfunction that responds to sulfonylureas at approximately 4x the sensitivity of typical T2D. Many HNF1A-MODY patients misdiagnosed as T1D are on insulin with suboptimal control and hypoglycemic episodes. When molecular HNF1A diagnosis is made and they switch to low-dose sulfonylureas, glycemic control often improves while the treatment burden dramatically decreases (daily pills vs. multiple daily injections). The cost savings and quality of life improvement are substantial.
Your full DNA (not just a part of it)
Traditional genetic testing looks at narrow sets of genes, missing most parts of your genome. We sequence your full genome — every gene and every region between genes.
Comprehensive insights and specialized reports
Easy to read and with answers you and your doctor can act on. Not a file to interpret — 200+ clinical reports, organized by category.
Your test becomes more valuable every year
Your DNA does not change, but genome science is accelerating. Every month, new variant-disease associations are discovered. We validate these findings and update your reports automatically. Your test becomes more valuable every year.
The results doctors bring to their hardest cases.
Forty years of uncertainty. One test.
A patient had spent decades in the UK healthcare system without a diagnosis. Dante data, accepted by NHS clinical teams at Queen Elizabeth University Hospital Glasgow, identified Noonan Syndrome and a RUNX1 leukemia-associated variant that had gone undetected. After 40 years, they finally had an answer.
A complete read delivers a complete picture.
A patient came to Dante to investigate periodic paralysis. Reading the complete genome identified a concurrent hereditary cardiac finding — Brugada syndrome — that their doctor confirmed with an ECG. The result also explained a family member's unresolved cardiac history. One test. Every answer in it.
Sequenced in 2019. The data worked in 2021.
Jennifer sequenced her genome with Dante two years before her breast cancer diagnosis. When treatment began, Dante's pharmacogenomics data showed her prescribed chemotherapy would cause serious adverse effects. Her doctor selected an alternative — and she started effective treatment from day one.
Every genetic question deserves a complete answer.
Whether you are searching for answers today or protecting your health for tomorrow, a complete read of your entire genome is the only place to start.
It runs in your family. Now you can know if it runs in your genes.
Your genome contains inherited variants associated with medical conditions like cardiac, cancer, and neurological. We read all of them — with the clinical depth to give the result meaning.
Learn more →When traditional lab tests say you're fine. And you know you're not.
Standard diagnostic tests check for a pre-selected set of answers. We sequence your full DNA — including parts that no test was designed to check. If the answer is in your genome, we will help you find it.
Learn more →Your diagnosis may be right. Your treatment plan may be incomplete.
Your genes determine which treatments are most likely to work — and which are not. We give your doctor the tools and insights to inform your treatment plan.
Learn more →You want to know before something forces the question.
Some people don't wait for a diagnosis or a family history to act. Whole genome sequencing gives you the complete genetic picture now — so you and your doctor can make informed decisions before anything becomes urgent.
Learn more →You already took a DNA test. Here's what it couldn't tell you.
Most consumer DNA tests read less than 0.1% of your genome. We read all of it.
Learn more →Clinical-grade results. Chosen by individuals, trusted by doctors for their most complex cases.
Dante Genome Test helped specialists at a UK national acute hospital in the identification of Noonan Syndrome and a rare leukemia-associated genetic variant that had gone undetected. That result changed the medical care of the patient.
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Common questions about whole genome sequencing.
What is the difference between whole genome sequencing and a targeted genetic test?
Targeted genetic tests — including standard hereditary cancer panels — read a pre-defined list of known variants in a specific set of genes. They are designed to find what they already know to look for. Whole genome sequencing reads your entire genome: all 6 billion base pairs, every gene, every region between genes. A Mayo Clinic study published in JAMA Oncology found that standard testing guidelines missed more than half of patients with inherited cancer mutations. Genome Test does not have a fixed list.
What will I receive when my results are ready?
Your Dante Genome delivers 200+ physician-ready reports organized by clinical category — hereditary cancer, cardiac conditions, rare diseases, pharmacogenomics, carrier status, and more. Reports are delivered to your secure Genome Manager and are formatted for direct clinical use. Your genome data is permanently retained and re-analyzed automatically as science advances.
What happens if a clinically significant variant is found?
If a pathogenic or likely-pathogenic variant is identified, it will be clearly flagged in your physician-ready report with clinical context, published evidence, and recommended next steps. We recommend sharing any clinically significant finding with your physician or a genetic counselor, who can guide decisions about surveillance, risk reduction, or cascade testing for family members.
How is this different from a consumer DNA test like 23andMe or AncestryDNA?
Consumer DNA tests use genotyping chips that read less than 0.1% of your genome — a tiny pre-selected set of common variants. They are optimized for ancestry and population-level traits, not clinical genetic findings. The Dante Genome Test sequences 100% of your genome at 30X coverage, the same standard used in clinical diagnostic settings. The two tests are not comparable in scope, methodology, or clinical utility.
How long does it take to get results, and how are they delivered?
Your collection kit ships within 48 hours of ordering. Once your sample arrives at our CLIA-certified laboratory, sequencing and analysis takes 6–8 weeks. Results are delivered securely to your Genome Manager, where you can access your reports, share them with your physician, and receive automatic updates as new findings are validated against your genome.
We work with patient advocacy groups worldwide.
Dante Labs works with patient advocacy groups of any size — for Type 2 Diabetes & MODY — Genetic Testing and other conditions, rare and common. We support groups in any country, including virtual patient advocacy groups.
We can provide customized reports, group discounts, and packages tailored for your members. Please reach out using the form and we'll be in touch within two business days.
- Custom genomic reports for your members
- Group discounts and tailored packages
- Any country — including virtual groups
- Rare and common conditions covered
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We'll be in touch within 2 business days. To follow up directly: hello@dantelabs.com
One test.
A lifetime of answers.
One kit, sent to your home. Your entire genome sequenced at the clinical standard used for diagnostic decisions. 200+ physician-ready reports delivered to your Genome Manager in 6–8 weeks — permanent and updated as science advances.
Ships within 48 hours · Results in 6–8 weeks
