德国海德尔堡儿童癌症研究中心Stefan M. Pfister、美国圣朱迪儿童研究医院Paul A. Northcott、德国欧洲分子生物学实验室Jan O. Korbel等研究人员合作有了新发现。他们揭示了Sonic Hedgehog型髓母细胞瘤中Elongator复合物的生殖突变。这一研究成果于2020年4月1日在线发表在《自然》杂志上。
Title: Germline Elongator mutations in Sonic Hedgehog medulloblastoma
Author: SebastianM. Waszak, GilesW, Robinson, Brian L. Gudenas, Kyle S. Smith, Antoine Forget, Marija Kojic, Jesus Garcia-Lopez, Jennifer Hadley, Kayla V. Hamilton, Emilie Indersie, Ivo Buchhalter, Jules Kerssemakers, Natalie Jger, Tanvi Sharma, Tobias Rausch, Marcel Kool, Dominik Sturm, David T. W. Jones, Aksana Vasilyeva, Ruth G. Tatevossian, Geoffrey Neale, Brangre Lombard, Damarys Loew, Joy Nakitandwe, Michael Rusch, Daniel C. Bowers, Anne Bendel, Sonia Partap, Murali Chintagumpala, John Crawford, Nicholas G. Gottardo, Amy Smith, Christelle Dufour, Stefan Rutkowski, Tone Eggen, Finn Wesenberg, Kristina Kjaerheim, Maria Feychting, Birgitta Lannering, Joachim Schz, Christoffer Johansen, Tina V. Andersen, Martin Rsli, Claudia E. Kuehni, Michael Grotzer, Marc Remke, Stphanie Puget, Kristian W. Pajtler, Till Milde, Olaf Witt, Marina Ryzhova, Andrey Korshunov, Brent A. Orr, David W. Ellison, Laurence Brugieres, Peter Lichter, Kim E. Nichols, Amar Gajjar, Brandon J. Wainwright, Olivier Ayrault, Jan O. Korbel, Paul A. Northcott, Stefan M. Pfister
Issue&Volume: 2020-04-01
Abstract: Cancer genomics has revealed many genes and core molecular processes that contribute to human malignancies, but the genetic and molecular bases of many rare cancers remains unclear. Genetic predisposition accounts for 5 to 10% of cancer diagnoses in children1,2, and genetic events that cooperate with known somatic driver events are poorly understood. Pathogenic germline variants in established cancer predisposition genes have been recently identified in 5% of patients with the malignant brain tumour medulloblastoma3. Here, by analysing all protein-coding genes, we identify and replicate rare germline loss-of-function variants across ELP1 in 14% of paediatric patients with the medulloblastoma subgroup Sonic Hedgehog (MBSHH). ELP1 was the most common medulloblastoma predisposition gene and increased the prevalence of genetic predisposition to 40% among paediatric patients with MBSHH. Parent–offspring and pedigree analyses identified two families with a history of paediatric medulloblastoma. ELP1-associated medulloblastomas were restricted to the molecular SHHα subtype4 and characterized by universal biallelic inactivation of ELP1 owing to somatic loss of chromosome arm 9q. Most ELP1-associated medulloblastomas also exhibited somatic alterations in PTCH1, which suggests that germline ELP1 loss-of-function variants predispose individuals to tumour development in combination with constitutive activation of SHH signalling. ELP1 is the largest subunit of the evolutionarily conserved Elongator complex, which catalyses translational elongation through tRNA modifications at the wobble (U34) position5,6. Tumours from patients with ELP1-associated MBSHH were characterized by a destabilized Elongator complex, loss of Elongator-dependent tRNA modifications, codon-dependent translational reprogramming, and induction of the unfolded protein response, consistent with loss of protein homeostasis due to Elongator deficiency in model systems7,8,9. Thus, genetic predisposition to proteome instability may be a determinant in the pathogenesis of paediatric brain cancers. These results support investigation of the role of protein homeostasis in other cancer types and potential for therapeutic interference.
DOI: 10.1038/s41586-020-2164-5
Source: https://www.nature.com/articles/s41586-020-2164-5
Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:69.504
官方网址:http://www.nature.com/
投稿链接:http://www.nature.com/authors/submit_manuscript.html
本期文章:《自然》:Online/在线发表