PMID- 38358805 OWN - NLM STAT- MEDLINE DCOM- 20240325 LR - 20240329 IS - 2379-3708 (Electronic) IS - 2379-3708 (Linking) VI - 9 IP - 6 DP - 2024 Feb 15 TI - Increasing Sufu gene dosage reveals its unorthodox role in promoting polydactyly and medulloblastoma tumorigenesis. LID - 10.1172/jci.insight.176044 [doi] LID - e176044 AB - Suppressor of fused (SUFU) is widely regarded as a key negative regulator of the sonic hedgehog (SHH) morphogenic pathway and a known tumor suppressor of medulloblastoma (MB). However, we report here that SUFU expression was markedly increased in 75% of specimens compiled in a tissue array comprising 49 unstratified MBs. The SUFU and GLI1 expression levels in this MB array showed strong positive correlation, which was also identified in a large public data set containing 736 MBs. We further report that increasing Sufu gene dosage in mice caused preaxial polydactyly, which was associated with the expansion of the Gli3 domain in the anterior limb bud and heightened Shh signaling responses during embryonic development. Increasing Sufu gene dosage also led to accelerated cerebellar development and, when combined with ablation of the Shh receptor encoded by Patched1 (Ptch1), promoted MB tumorigenesis. These data reveal multifaceted roles of SUFU in promoting MB tumorigenesis by enhancing SHH signaling. This revelation clarifies potentially counterintuitive clinical observation of high SUFU expression in MBs and may pave way for novel strategies to reduce or reverse MB progression. FAU - Han, Boang AU - Han B AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Wang, Yu AU - Wang Y AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Yue, Shen AU - Yue S AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Zhang, Yun-Hao AU - Zhang YH AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Kuang, Lun AU - Kuang L AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Gao, Bin-Bin AU - Gao BB AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Wang, Yue AU - Wang Y AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Zhang, Ziyu AU - Zhang Z AD - Key Laboratory of Women's Reproductive Health of Jiangxi, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China. FAU - Pu, Xiaohong AU - Pu X AD - Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China. FAU - Wang, Xin-Fa AU - Wang XF AD - Department of Neurosurgery, Children's Hospital of Nanjing Medical University, Nanjing, China. FAU - Hui, Chi-Chung AU - Hui CC AD - Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, and Department of Molecular Genetics, University of Toronto, Ontario, Canada. FAU - Yu, Ting-Ting AU - Yu TT AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Liu, Chen AU - Liu C AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. FAU - Cheng, Steven Y AU - Cheng SY AD - Department of Medical Genetics, Nanjing Medical University, Nanjing, China. LA - eng PT - Journal Article DEP - 20240215 PL - United States TA - JCI Insight JT - JCI insight JID - 101676073 RN - 0 (Repressor Proteins) RN - 0 (Hedgehog Proteins) RN - 0 (Transcription Factors) SB - IM MH - Mice MH - Animals MH - *Medulloblastoma/genetics/pathology MH - Repressor Proteins/genetics/metabolism MH - Hedgehog Proteins/genetics/metabolism MH - Cell Transformation, Neoplastic/genetics MH - Transcription Factors MH - *Cerebellar Neoplasms/genetics MH - *Polydactyly/genetics PMC - PMC10972619 OTO - NOTNLM OT - Cancer OT - Development OT - Mouse models OT - Oncology EDAT- 2024/02/15 18:42 MHDA- 2024/03/25 06:42 PMCR- 2024/02/15 CRDT- 2024/02/15 12:03 PHST- 2023/09/26 00:00 [received] PHST- 2024/02/07 00:00 [accepted] PHST- 2024/03/25 06:42 [medline] PHST- 2024/02/15 18:42 [pubmed] PHST- 2024/02/15 12:03 [entrez] PHST- 2024/02/15 00:00 [pmc-release] AID - 176044 [pii] AID - 10.1172/jci.insight.176044 [doi] PST - epublish SO - JCI Insight. 2024 Feb 15;9(6):e176044. doi: 10.1172/jci.insight.176044.