Whole exome sequencing of patients who resolved Crohn's disease and complex regional pain syndrome following treatment for paratuberculosis
GUT PATHOGENS
Authors: Kuenstner, J. Todd; Kali, Maher; Welch, Christine
Abstract
BackgroundA whole exome sequencing study was performed on an extended family including a patient with Crohn's disease (CD) and a patient with complex regional pain syndrome (CRPS). The patient with CD and the patient with CRPS have experienced resolution of their disease following treatment for paratuberculosis. The study was performed in order to determine if there is an unusual mutation in this extended family that would explain the susceptibility to mycobacterial infection among many of the members.ResultsWe identified sets of rare single nucleotide polymorphisms (SNPs) that were shared among affected family members, including variants in two genes, IL15RA and CASP10, which have established roles in the immune response. In addition, the CD and CRPS patients were found to have heterozygous mutations in MBL2 and DDX58, mutations that have been associated with susceptibility to tuberculosis.ConclusionsThe IL15RA and CASP10 variants may contribute to the disease symptoms exhibited in this family. The finding of SNPs associated with immune function supports a complementary role of infection and genetics in these diseases.
Molecular classification and subtype-specific characterization of skin cutaneous melanoma by aggregating multiple genomic platform data
JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY
Authors: Lu, Xiaofan; Zhang, Qianyuan; Wang, Yue; Zhang, Liya; Zhao, Huiling; Chen, Chen; Wang, Yaoyan; Liu, Shengjie; Lu, Tao; Wang, Fei; Yan, Fangrong
Abstract
Traditional classification of melanoma is widely utilized with little apparent results making the development of robust classifiers that can guide therapies an urgency. Successful seminal research on classification has provided a wider understanding of cancer from multiple molecular profiles, respectively. However, it may ignore the complementary nature of the information provided by different types of data, which motivated us to subtype melanoma by aggregating multiple genomic platform data. Aggregating three omics data of 328 melanoma samples, melanoma subtyping was performed by three clustering methods. Differences across subtypes were extracted by functional enrichment, epigenetically silencing, gene mutations and clinical features. Subtypes were further distinguished by putative biomarkers. Functional enrichment of the subtype-specific differential expression genes endowed subtypes new designation: immune, melanin and ion, in which the first subtype was enriched for immune system, the second was characterized by melanin and pigmentation, and the third was enriched for ion-involved transmission process. Subtypes also differed in age, Breslow thickness, tumor site, mutation frequency of BRAF, PTGS2, CDKN2A, CDKN2B and incidence of epigenetically silencing for IL15RA, EPSTI1, LXN, CDKN1B genes. Skin cutaneous melanoma can be robustly divided into three subtypes by SNFCC+. Compared with the TCGA classification derived from gene expression, the subtypes we presented share concordance, but new traits are excavated. Such a genomic classification offers insights to further personalize therapeutic decision-making and melanoma management.