Genome-based expression profiling study of Hunner's ulcer type interstitial cystitis: an array of 40-gene model.
OBJECTIVE
The aim of this study was to explore potential molecular mechanisms contributing to the pathogenesis of Hunner's ulcer type interstitial cystitis (IC).


METHODS
Dataset acquisitions from Gene Expression Omnibus under platform accession no GSE 11783. We compared global gene expression profiles in bladder epithelial cells from IC patients with Hunner's ulcer corresponding to normal controls. We re-sampling and exploit the correlation structure presented in the dataset through the transcriptional response. For each patient, two bladder biopsies were studied, one from an ulcer area and one from a non-ulcer area. RNA was extracted, and all labeled samples were hybridized to Human Genome U133 Plus 2.0 Array (Affymetrix, CA, USA).


RESULTS
The Mahalanobis distance in hierarchical cluster analysis revealed a model of 40 genes expression which is increased in IC and ulcerated IC. Our results can be summarized as follows: First, the expressions of major histocompatibility complex (MHC) class IF and II molecules, leukocyte immunoglobulin-like receptors, hepatitis A virus cellular receptor 2, and interleukin 32 were increased in bladder epithelial from IC and ulcerative IC area. Next, there is an indication of antigen-mediated aggregation of the high-affinity Fc epsilon and gamma RI leading to allergic inflammation through the disease status. Third, the high-affinity Fc gamma RI subunit facilitated T-cell-mediated immune response through the disease status. Such changes, jointly termed "bladder remodeling," can constitute an important long-term consequence of Hunner's ulcer type IC.


CONCLUSIONS
Our results indicate that genome-based expression profiling can be used for the diagnostic tests of Hunner's ulcer type IC in clinical practice.
Tseng
Ling-Hong
LH
Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital and Chang Gung University, School of Medicine, Kwei-Shan, Tao-Yuan, Taiwan.
Chen
Ilene
I
Wang
Chao-Nin
CN
Lin
Yi-Hao
YH
Lloyd
L Keith
LK
Lee
Chyi-Long
CL
D016022:Case-Control Studies; D018856:Cystitis, Interstitial / Q000175:diagnosis / Q000235:genetics* / Q000378:metabolism; D005260:Female; D020869:Gene Expression Profiling; D005805:Genes, MHC Class I; D005802:Genes, MHC Class II; D005820:Genetic Testing; D000072597:Hepatitis A Virus Cellular Receptor 2; D006801:Humans; D007378:Interleukins / Q000235:genetics; D008565:Membrane Proteins / Q000235:genetics; D008957:Models, Genetic; D017455:Receptors, IgE / Q000235:genetics; D017452:Receptors, IgG / Q000235:genetics
C448908:HAVCR2 protein, human; D000072597:Hepatitis A Virus Cellular Receptor 2; C496971:IL32 protein, human; D007378:Interleukins; D008565:Membrane Proteins; D017455:Receptors, IgE; D017452:Receptors, IgG