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Cystic fibrosis

CFTR · rs377447726

Where this position leads

Condition: Cystic Fibrosis

Drugs: Elexacaftor/tezacaftor/ivacaftor (Trikafta), Ivacaftor, Vanzacaftor/tezacaftor/deutivacaftor (Alyftrek)

rs377447726 Condition: Cystic Fibrosis Cystic Fibrosis Condition Drug: Elexacaftor/tezacaftor/ivacaftor (Trikafta) Elexacaftor/tezacaftor/ivacaftor (T… Drug Drug: Ivacaftor Ivacaftor Drug Drug: Vanzacaftor/tezacaftor/deutivacaftor (Alyftrek) Vanzacaftor/tezacaftor/deutivacafto… Drug rs377447726 rs377447726 CFTR

Strength of the evidence

There is no record yet to score this position by (a ClinVar disease classification or a genome-wide significant study). That is not the same as weak evidence.

How this is scored

4: ClinVar disease-causing, reviewed by an expert panel or a guideline (3–4 stars). 3: ClinVar, several labs agreeing (2 stars), or a genetic study at p ≤ 10−50. 2: ClinVar from one lab (1 star), or p ≤ 10−20. 1: ClinVar submitted without criteria (0 stars), or genome-wide significance (p ≤ 5×10−8). The higher of the two counts. It says how solid the evidence is, not whether it matters for a particular person.

What ClinVar records

Classification Uncertain significance for Cystic fibrosis, CFTR-related disorder; criteria provided, multiple submitters, no conflicts (2 of 4 stars, 11 submitters), last evaluated 2026-01-06. ClinVar record 53488 NM_000492.4(CFTR):c.2428A>G (p.Arg810Gly)

Classification Pathogenic for Cystic fibrosis; criteria provided, multiple submitters, no conflicts (2 of 4 stars, 4 submitters), last evaluated 2024-12-17. ClinVar record 811333 NM_000492.4(CFTR):c.2428A>T (p.Arg810Ter)

Change history MyGeneLog™ keeps a copy of every weekly release from 2026-10-19 and compares them. This position's classification has not changed since.

What this is ClinVar's aggregate record for this position (as of its 2026-10-19 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

What each result means

A/A No copy of the version ClinVar lists as disease-causing for Cystic fibrosis. This is the usual result. (ClinVar VCV000811333, criteria provided, multiple submitters, no conflicts)
A/T One copy of the version ClinVar lists as disease-causing for Cystic fibrosis. Some conditions need only one copy; for others, one copy makes a person a carrier who is usually healthy but can pass it on. A genetic counsellor can say which applies. (ClinVar VCV000811333, criteria provided, multiple submitters, no conflicts)
T/T Two copies of the version ClinVar lists as disease-causing for Cystic fibrosis. A result like this should be confirmed by a medical genetic test and talked through with a doctor; consumer DNA files can misread rare variants. (ClinVar VCV000811333, criteria provided, multiple submitters, no conflicts)

Source: ClinVar VCV000811333, criteria provided, multiple submitters, no conflicts

Questions about rs377447726

What is rs377447726?

rs377447726 is a single position in the genome, in or near the CFTR gene. Published research associates it with cystic fibrosis. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.

What conditions is rs377447726 linked to?

On MyGeneLog this position is linked to Cystic Fibrosis. The research behind each link, and its sources, are set out on that condition page.

Does rs377447726 affect how medicines work?

CFTR carries pharmacogenomic findings for Elexacaftor/tezacaftor/ivacaftor (Trikafta), Ivacaftor, Vanzacaftor/tezacaftor/deutivacaftor (Alyftrek). That is educational information, not a prescription or a dosing guide. Any decision to start, stop or change a medicine belongs with the clinician or pharmacist managing your treatment.

Does having rs377447726 mean I will get this?

No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.

Where does the information about rs377447726 come from?

ClinVar VCV000811333, criteria provided, multiple submitters, no conflicts. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.

Quoting this page

Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.

Cystic fibrosis (rs377447726). MyGeneLog™. https://www.mygenelog.com/variants/rs377447726

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