Eustachian Tube Growth and Development: Anatomy/Function. Protocol Description. This study measures Eustachian tube function and facial growth over time in three groups of children: one with recurrent ear infections, one with chronic middle ear fluid, and one with little past history of otitis media.
Causes of Kartagener syndrome. Kartagener syndrome is caused by a mutation in the DNAI1 gene, which makes a cellular protein required for normal functioning cilia (cilia line the respiratory tract) and sperm motility.
1 Identified a variant in a gene (VPS35) that is the latest gene identified to cause Parkinson's disease. 2  Discovered mutations in a gene (DCTN1) that produce a very severe form of parkinsonism associated with breathing difficulties and severe depression.ogether, Mayo physicians and researchers have discovered a number of genes that cause parkinsonian disorders. For example, Mayo researchers: 1  Found the gene leucine-rich repeat kinase 2 (LRRK2) to be the most common genetic cause of late-onset, autosomal dominant Parkinson's disease.