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The MTHFR (Methylenetetrahydrofolate Reductase) Gene PCR Test is used to detect genetic mutations in the MTHFR gene, which affects folate metabolism and homocysteine levels. Mutations in this gene can be associated with an increased risk of certain health conditions, including:
✅ Elevated homocysteine levels – Linked to cardiovascular disease, stroke, and blood clotting disorders.
✅ Neural tube defects – If present in pregnant women, it may affect fetal development.
✅ Recurrent pregnancy loss – Some studies suggest a link with miscarriages.
✅ Migraine, depression, and neurological disorders – Due to impaired methylation and folate metabolism.
🔬 The PCR test detects the two most common MTHFR gene mutations (polymorphisms):
| Mutation | Possible Effects | Impact on Health |
|---|---|---|
| C677T (rs1801133) | Reduces enzyme activity (homozygous carriers have ~30% enzyme function) | High homocysteine, heart disease risk, neural tube defects |
| A1298C (rs1801131) | Milder effect than C677T but can contribute to folate metabolism issues | May impact methylation, neurological health |
📌 Homozygous (two copies) mutation results in greater enzyme reduction than heterozygous (one copy).
🔬 Sample Type: Blood (EDTA) or Buccal Swab
🧬 Method: PCR (Polymerase Chain Reaction) for mutation detection
| Genotype | C677T Mutation | A1298C Mutation | Possible Impact |
|---|---|---|---|
| Normal (Wild Type) | CC (Normal) | AA (Normal) | Normal folate metabolism |
| Heterozygous | C/T | A/A or C/C | Mildly reduced enzyme function |
| Homozygous | T/T | A/A or C/C | Significantly reduced enzyme function, high homocysteine risk |
| Compound Heterozygous | C/T | A/C | Moderate effect, potential folate metabolism issues |
📌 Having one or both mutations does not guarantee disease but may increase risk factors, especially if homocysteine levels are high.
🩺 If you test positive for MTHFR mutations:
✔ Check Homocysteine Levels – If elevated, dietary changes or supplements may be needed.
✔ Increase Folate (Methylated Form) – Use 5-MTHF (L-methylfolate) instead of synthetic folic acid.
✔ Monitor Cardiovascular & Neurological Health – Especially if there’s a family history of heart disease, stroke, or neurological conditions.
✔ Pregnancy Considerations – Women with MTHFR mutations should discuss prenatal care, including higher folate intake, with their doctor.
⚠ Not everyone with an MTHFR mutation will have health problems; lifestyle, diet, and other genetic factors also play a role.