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Published on: April 27, 2014
Mendelian Disorders in an Interstitial Cystitis/Bladder Pain Syndrome Cohort
Elicia Estrella1,2,3, Shira Rockowitz3,4, Marielle Thorne2,3
1Department of Neurology Boston Children's Hospital Harvard Medical School Boston MA 02115 USA.
Genetic analysis of interstitial cystitis/bladder pain syndrome (IC/BPS) suggests some patients may have undiagnosed genetic disorders. Genes like ATP2C1, ATP2A2, and SIX5 may be linked to IC/BPS, warranting further investigation.
Area of Science:
- Genetics
- Urology
- Medical Syndromes
Background:
- Interstitial cystitis/bladder pain syndrome (IC/BPS) is a chronic condition characterized by urinary frequency, urgency, and bladder pain.
- The etiology of IC/BPS remains largely unknown, despite its significant impact on a large patient population.
Purpose of the Study:
- To investigate the genetic underpinnings of IC/BPS by performing whole exome sequencing.
- To identify potential genetic variants and Mendelian syndromes associated with IC/BPS.
- To explore candidate genes that may contribute to the development of IC/BPS.
Main Methods:
- Whole exome sequencing was conducted on 109 individuals diagnosed with IC/BPS.
- Genetic variants in known disease genes (SIX5, ATP2A2, ATP2C1) were identified.
- Sequence Kernel Association Test (SKAT) was used to analyze the burden of rare variants in ATP2C1.
Main Results:
- A previously reported SIX5 variant associated with Branchiootorenal syndrome 2 (BOR2) was found in one family.
- Likely pathogenic variants in ATP2A2 (Darier-White disease) and ATP2C1 (Hailey-Hailey Disease) were identified in IC/BPS patients.
- A statistically significant increased burden of rare ATP2C1 variants was observed in IC/BPS cases compared to controls (p=0.03).
Conclusions:
- Some individuals with IC/BPS may have undiagnosed Mendelian genetic syndromes.
- ATP2C1, ATP2A2, and SIX5 are proposed as candidate genes for IC/BPS.
- Genetic screening could aid in diagnosing and managing the heterogeneous nature of IC/BPS.
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