Cystic fibrosis overview
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:
Overview
Historical Perspective
In the late 1930s cystic fibrosis was first recognized as a disease. In 1949, Lowe and colleagues suggested this theory that cystic fibrosis must be caused by a defect in a single gene. In 1989, the CFTR gene was discovered first. In 1990, scientists successfully added cloned normal gene to cystic fibrosis cells which corrected the chloride transportion.
Classification
Cystic fibrosis may be classified according to CFTR protein function abnormality into 6 groups: lack of production (Class 1), failure to reach the site of action due to misfolding (class 2), defects in gating (class 3), reduced ion conductance (class 4), abnormally low channel numbers (class 5) and decreased half-life (class 6). Cystic fibrosis classes 1,2 and 3 are the most common types which have associated with pancreatic insufficiency.