The NF-kappa B signalling pathway in colorectal cancer: associations between dysregulated gene and miRNA expression
JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY
Authors: Slattery, Martha L.; Mullany, Lila E.; Sakoda, Lori; Samowitz, Wade S.; Wolff, Roger K.; Stevens, John R.; Herrick, Jennifer S.
Abstract
Background The nuclear factor-kappa B (NF-kappa B) signalling pathway is a regulator of immune response and inflammation that has been implicated in the carcinogenic process. We examined differentially expressed genes in this pathway and miRNAs to determine associations with colorectal cancer (CRC). Methods We used data from 217 CRC cases to evaluate differences in NF-kappa B signalling pathway gene expression between paired carcinoma and normal mucosa and identify miRNAs that are associated with these genes. Gene expression data from RNA-Seq and miRNA expression data from Agilent Human miRNA Microarray V19.0 were analysed. We evaluated genes most strongly associated and differentially expressed (fold change (FC) of > 1.5 or < 0.67) that were statistically significant after adjustment for multiple comparisons. Results Of the 92 genes evaluated, 22 were significantly downregulated and nine genes were significantly upregulated in all tumours. Two additional genes (CD14 and CSNK2A1) were dysregulated in MSS tumours and two genes (CARD11 and VCAM1) were downregulated and six genes were upregulated (LYN, TICAM2, ICAM1, IL1B, CCL4 and PTGS2) in MSI tumours. Sixteen of the 21 dysregulated genes were associated with 40 miRNAs. There were 76 miRNA:mRNA associations of which 38 had seed-region matches. Genes were associated with multiple miRNAs, with TNFSRF11A (RANK) being associated with 15 miRNAs. Likewise several miRNAs were associated with multiple genes (miR-150-5p with eight genes, miR-195-5p with four genes, miR-203a with five genes, miR-20b-5p with four genes, miR-650 with six genes and miR-92a-3p with five genes). Conclusions Focusing on the genes and their associated miRNAs within the entire signalling pathway provides a comprehensive understanding of this complex pathway as it relates to CRC and offers insight into potential therapeutic agents.
Dual molecular diagnosis of tricho-rhino-phalangeal syndrome type I and Okur-Chung neurodevelopmental syndrome in one Chinese patient: a case report
BMC MEDICAL GENETICS
Authors: Xu, Shanshan; Lian, Qun; Wu, Jinzhun; Li, Lingli; Song, Jia
Abstract
Background Okur-Chung neurodevelopmental syndrome (OCNDS) and tricho-rhino-phalangeal syndrome type I (TRPSI) are rare Mendelian diseases. OCNDS is caused byCSNK2A1gene variants and TRPSI is caused by theTRPS1gene. However, to have two Mendelian diseases in one patient is even rarer. Case presentation A 6-year-10-month-old boy characterized by special facial features, short stature and mental retardation was referred to our pediatric endocrinology department. Whole-exome sequencing (WES) was done to detect the molecular basis of his disease. This patient was confirmed to carry two variants in theCSNK2A1gene and one in theTRPS1gene. The variant in theCSNK2A1gene was vertically transmitted from his father, and the variant inTRPS1gene from his mother. These two variants are classified as pathogenic and the causes of the presentation in this child. This patient's father and mother have subsequently been diagnosed as having OCNDS and TRPSI respectively. Conclusion This is the first reported case of a dual molecular diagnosis of tricho-rhino-phalangeal syndrome type I and Okur-Chung neurodevelopmental syndrome in the same patient. This patient is the first published example of vertical transmission of this recurrentCSN2A1variant from parent to child. A novel variant in theTRPS1gene that is pathogenic was also identified. In conclusion, identification of the variants in this patient expands the phenotypes and molecular basis of dual Mendelian diseases.