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3 results on '"Stearns, Duncan S."'

1. Failure of human rhombic lip differentiation underlies medulloblastoma formation

Author

Hendrikse, Liam D, Haldipur, Parthiv, Saulnier, Olivier, Millman, Jake, Sjoboen, Alexandria H, Erickson, Anders W, Ong, Winnie, Gordon, Victor, Coudière-Morrison, Ludivine, Mercier, Audrey L, Shokouhian, Mohammad, Suárez, Raúl A, Ly, Michelle, Borlase, Stephanie, Scott, David S, Vladoiu, Maria C, Farooq, Hamza, Sirbu, Olga, Nakashima, Takuma, Nambu, Shohei, Funakoshi, Yusuke, Bahcheli, Alec, Diaz-Mejia, J Javier, Golser, Joseph, Bach, Kathleen, Phuong-Bao, Tram, Skowron, Patryk, Wang, Evan Y, Kumar, Sachin A, Balin, Polina, Visvanathan, Abhirami, Lee, John JY, Ayoub, Ramy, Chen, Xin, Chen, Xiaodi, Mungall, Karen L, Luu, Betty, Bérubé, Pierre, Wang, Yu C, Pfister, Stefan M, Kim, Seung-Ki, Delattre, Olivier, Bourdeaut, Franck, Doz, François, Masliah-Planchon, Julien, Grajkowska, Wieslawa A, Loukides, James, Dirks, Peter, Fèvre-Montange, Michelle, Jouvet, Anne, French, Pim J, Kros, Johan M, Zitterbart, Karel, Bailey, Swneke D, Eberhart, Charles G, Rao, Amulya AN, Giannini, Caterina, Olson, James M, Garami, Miklós, Hauser, Peter, Phillips, Joanna J, Ra, Young S, de Torres, Carmen, Mora, Jaume, Li, Kay KW, Ng, Ho-Keung, Poon, Wai S, Pollack, Ian F, López-Aguilar, Enrique, Gillespie, G Yancey, Van Meter, Timothy E, Shofuda, Tomoko, Vibhakar, Rajeev, Thompson, Reid C, Cooper, Michael K, Rubin, Joshua B, Kumabe, Toshihiro, Jung, Shin, Lach, Boleslaw, Iolascon, Achille, Ferrucci, Veronica, de Antonellis, Pasqualino, Zollo, Massimo, Cinalli, Giuseppe, Robinson, Shenandoah, Stearns, Duncan S, Van Meir, Erwin G, Porrati, Paola, Finocchiaro, Gaetano, Massimino, Maura, Carlotti, Carlos G, Faria, Claudia C, Roussel, Martine F, Boop, Frederick, Chan, Jennifer A, Aldinger, Kimberly A, Razavi, Ferechte, Silvestri, Evelina, McLendon, Roger E, and Thompson, Eric M

Subjects
Stem Cell Research, Brain Disorders, Neurosciences, Rare Diseases, Stem Cell Research - Nonembryonic - Non-Human, Aetiology, 1.1 Normal biological development and functioning, Underpinning research, 2.1 Biological and endogenous factors, Cell Differentiation, Cell Lineage, Cerebellar Neoplasms, Cerebellum, Core Binding Factor alpha Subunits, Hedgehog Proteins, Histone Demethylases, Humans, Ki-67 Antigen, Medulloblastoma, Metencephalon, Muscle Proteins, Mutation, Otx Transcription Factors, Repressor Proteins, T-Box Domain Proteins, Transcription Factors, General Science & Technology
Abstract

Medulloblastoma (MB) comprises a group of heterogeneous paediatric embryonal neoplasms of the hindbrain with strong links to early development of the hindbrain1-4. Mutations that activate Sonic hedgehog signalling lead to Sonic hedgehog MB in the upper rhombic lip (RL) granule cell lineage5-8. By contrast, mutations that activate WNT signalling lead to WNT MB in the lower RL9,10. However, little is known about the more commonly occurring group 4 (G4) MB, which is thought to arise in the unipolar brush cell lineage3,4. Here we demonstrate that somatic mutations that cause G4 MB converge on the core binding factor alpha (CBFA) complex and mutually exclusive alterations that affect CBFA2T2, CBFA2T3, PRDM6, UTX and OTX2. CBFA2T2 is expressed early in the progenitor cells of the cerebellar RL subventricular zone in Homo sapiens, and G4 MB transcriptionally resembles these progenitors but are stalled in developmental time. Knockdown of OTX2 in model systems relieves this differentiation blockade, which allows MB cells to spontaneously proceed along normal developmental differentiation trajectories. The specific nature of the split human RL, which is destined to generate most of the neurons in the human brain, and its high level of susceptible EOMES+KI67+ unipolar brush cell progenitor cells probably predisposes our species to the development of G4 MB.

Published
2022

2. Divergent clonal selection dominates medulloblastoma at recurrence

Author

Morrissy, A Sorana, Garzia, Livia, Shih, David JH, Zuyderduyn, Scott, Huang, Xi, Skowron, Patryk, Remke, Marc, Cavalli, Florence MG, Ramaswamy, Vijay, Lindsay, Patricia E, Jelveh, Salomeh, Donovan, Laura K, Wang, Xin, Luu, Betty, Zayne, Kory, Li, Yisu, Mayoh, Chelsea, Thiessen, Nina, Mercier, Eloi, Mungall, Karen L, Ma, Yusanne, Tse, Kane, Zeng, Thomas, Shumansky, Karey, Roth, Andrew JL, Shah, Sohrab, Farooq, Hamza, Kijima, Noriyuki, Holgado, Borja L, Lee, John JY, Matan-Lithwick, Stuart, Liu, Jessica, Mack, Stephen C, Manno, Alex, Michealraj, KA, Nor, Carolina, Peacock, John, Qin, Lei, Reimand, Juri, Rolider, Adi, Thompson, Yuan Y, Wu, Xiaochong, Pugh, Trevor, Ally, Adrian, Bilenky, Mikhail, Butterfield, Yaron SN, Carlsen, Rebecca, Cheng, Young, Chuah, Eric, Corbett, Richard D, Dhalla, Noreen, He, An, Lee, Darlene, Li, Haiyan I, Long, William, Mayo, Michael, Plettner, Patrick, Qian, Jenny Q, Schein, Jacqueline E, Tam, Angela, Wong, Tina, Birol, Inanc, Zhao, Yongjun, Faria, Claudia C, Pimentel, José, Nunes, Sofia, Shalaby, Tarek, Grotzer, Michael, Pollack, Ian F, Hamilton, Ronald L, Li, Xiao-Nan, Bendel, Anne E, Fults, Daniel W, Walter, Andrew W, Kumabe, Toshihiro, Tominaga, Teiji, Collins, V Peter, Cho, Yoon-Jae, Hoffman, Caitlin, Lyden, David, Wisoff, Jeffrey H, Garvin, James H, Stearns, Duncan S, Massimi, Luca, Schüller, Ulrich, Sterba, Jaroslav, Zitterbart, Karel, Puget, Stephanie, Ayrault, Olivier, Dunn, Sandra E, Tirapelli, Daniela PC, Carlotti, Carlos G, Wheeler, Helen, Hallahan, Andrew R, Ingram, Wendy, MacDonald, Tobey J, Olson, Jeffrey J, Van Meir, Erwin G, Lee, Ji-Yeoun, and Wang, Kyu-Chang

Subjects
Pediatric, Biotechnology, Genetics, Brain Disorders, Human Genome, Brain Cancer, Rare Diseases, Cancer, Animals, Cerebellar Neoplasms, Clone Cells, Craniospinal Irradiation, DNA Mutational Analysis, Disease Models, Animal, Drosophila melanogaster, Female, Genome, Human, Humans, Male, Medulloblastoma, Mice, Molecular Targeted Therapy, Neoplasm Recurrence, Local, Radiotherapy, Image-Guided, Selection, Genetic, Signal Transduction, Xenograft Model Antitumor Assays, General Science & Technology
Abstract

The development of targeted anti-cancer therapies through the study of cancer genomes is intended to increase survival rates and decrease treatment-related toxicity. We treated a transposon-driven, functional genomic mouse model of medulloblastoma with 'humanized' in vivo therapy (microneurosurgical tumour resection followed by multi-fractionated, image-guided radiotherapy). Genetic events in recurrent murine medulloblastoma exhibit a very poor overlap with those in matched murine diagnostic samples (

Published
2016

3. Hepatoblastoma in an 11-year-old

Author

Pateva, Irina B., Egler, Rachel A., and Stearns, Duncan S.

Subjects
Hepatoblastoma, Male, Lung Neoplasms, Incidence, Liver Neoplasms, liver tumors, digestive system diseases, Fatal Outcome, Recurrence, case report, Humans, Clinical Case Report, Age of Onset, Child, Omentum, Peritoneal Neoplasms, Research Article
Abstract

Rationale: Hepatoblastoma is a rare malignancy. Approximately 100 cases are diagnosed yearly in the United States. The highest incidence occurs in infants and in children younger than 5 years. Cases involving patients older than 5 years are very rare. We describe the case of a patient who was diagnosed with hepatoblastoma at an atypical age of presentation for this type of malignancy. We also performed Ovid MEDLINE search for hepatoblastoma and epidemiology reports occurring in children between the ages of 5 and 18 years. In this article we review the epidemiology and summarize case reports published between 1997 and 2012 of patients with hepatoblastoma, who were older than 5 years. Patient concerns and diagnosis: Our patient is an 11 year old boy with stage IV hepatoblastoma with lung and omental metastases at diagnosis. Interventions: The patient received 7 cycles of chemotherapy following the treatment plan of COG protocol AHEP 0731, off study. He also had tumor resection and omentectomy and achieved complete remission. Outcomes: He later had disease recurrence and after undergoing treatment with different modalities, ultimately died of his disease. Review of SEER program data shows that the incidence of hepatoblastoma in children above the age of 5 years is too infrequent to be calculated. Literature review revealed 13 cases of patients diagnosed at age older than 5 years. Most cases were published due to unusual associations and/or complications. There are no obvious unifying characteristics for these cases, although there may be a slight male preponderance and many patients in this selected series presented with elevated Alpha-fetoprotein. Lessons: The reported case is rare, given the very low incidence of hepatoblastoma outside of infancy. A systematic review of characteristics and outcomes for patients older than 5 years who are enrolled in cooperative group hepatoblastoma trials may reveal important information about the epidemiology and tumor biology in this rare patient population.

Published
2017

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