Article ; Online: A unique subset of low-risk Wilms tumors is characterized by loss of function of TRIM28 (KAP1), a gene critical in early renal development: A Children's Oncology Group study.
PloS one
2018 Volume 13, Issue 12, Page(s) e0208936
Abstract: This study explores the genomic alterations that contribute to the formation of a unique subset of low-risk, epithelial differentiated, favorable histology Wilms tumors (WT), tumors that have been characterized by their expression of post-induction renal ...
Abstract | This study explores the genomic alterations that contribute to the formation of a unique subset of low-risk, epithelial differentiated, favorable histology Wilms tumors (WT), tumors that have been characterized by their expression of post-induction renal developmental genes (Subset 1 WT). We demonstrate copy neutral loss of heterozygosity involving 19q13.32-q13.43, unaccompanied by evidence for imprinting by DNA methylation. We further identified loss-of-function somatic mutations in TRIM28 (also known as KAP1), located at 19q13, in 8/9 Subset 1 tumors analyzed. An additional germline TRIM28 mutation was identified in one patient. Retrospective evaluation of previously analyzed WT outside of Subset 1 identified an additional tumor with anaplasia and both TRIM28 and TP53 mutations. A major function of TRIM28 is the repression of endogenous retroviruses early in development. We depleted TRIM28 in HEK293 cells, which resulted in increased expression of endogenous retroviruses, a finding also demonstrated in TRIM28-mutant WT. TRIM28 has been shown by others to be active during early renal development, and to interact with WTX, another gene recurrently mutated in WT. Our findings suggest that inactivation of TRIM28 early in renal development contributes to the formation of this unique subset of FHWTs, although the precise manner in which TRIM28 impacts both normal renal development and oncogenesis remains elusive. |
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MeSH term(s) | Anaplasia/genetics ; Anaplasia/pathology ; Carcinogenesis/genetics ; DNA Methylation/genetics ; Female ; Germ-Line Mutation/genetics ; HEK293 Cells ; Humans ; Infant ; Infant, Newborn ; Kidney/growth & development ; Kidney/metabolism ; Kidney/pathology ; Kidney Neoplasms/genetics ; Kidney Neoplasms/pathology ; Loss of Function Mutation/genetics ; Male ; Risk Factors ; Tripartite Motif-Containing Protein 28/genetics ; Wilms Tumor/genetics ; Wilms Tumor/pathology |
Chemical Substances | TRIM28 protein, human (EC 2.3.2.27) ; Tripartite Motif-Containing Protein 28 (EC 2.3.2.27) |
Language | English |
Publishing date | 2018-12-13 |
Publishing country | United States |
Document type | Journal Article ; Research Support, N.I.H., Extramural |
ISSN | 1932-6203 |
ISSN (online) | 1932-6203 |
DOI | 10.1371/journal.pone.0208936 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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