kjmomma82,
The CFTR2 website database has some information that my be helpful to you.
http://www.cftr2.org/mutation.php?view=general&mutation_id=51
(Using the web site may be a bit confusing at first but it contains a lot of useful information based on actual patient data and it becomes easier to use after a while.)
The following is taken directly from their website:
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Summary for S1235R mutation:
- This mutation that DOES NOT cause CF when combined with another CF-causing mutation.
- There may patients in the CFTR2 database with this mutation who have CF, but this mutation is NOT THE CAUSE of their CF.
- There are 54 patients with this mutation in the CFTR2 database.
- Based on:
- clinical information obtained from these patients,
- laboratory experiments performed on this mutation, and
- analysis of groups of healthy individuals that carry this mutation,
we conclude that this mutation does not cause CF when combined with another CF-causing mutation.
Most individuals with this mutation (combined with another CF-causing mutation) will be healthy. A small number of individuals may develop mild symptoms or be diagnosed with a CFTR-related disorder (CFTR-RD; see FAQs), but symptoms are not expected to be severe enough to meet the definition of CF. Some individuals with a CFTR-RD may be represented in the CFTR2 database because they are followed by CF clinics. In this case, S1235R MAY be related to their symptoms. However, it is unlikely that these patients meet the criteria for a CF diagnosis.
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You can also see some statistics for patients with F508del and S1235R.
I hope this, and the site, provides some of the information you are looking for.