1
|
Zhang K, Sun W, Liu Y, Lv Y, Hou D, Lin Y, Xu W, Zhao J, Gai Z, Zhao S, Yuan Y. SINO Syndrome Causative KIDINS220/ARMS Gene Regulates Adipocyte Differentiation. Front Cell Dev Biol 2021; 9:619475. [PMID: 33763417 PMCID: PMC7982959 DOI: 10.3389/fcell.2021.619475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/08/2021] [Indexed: 11/24/2022] Open
Abstract
Nonsense variants in KIDINS220/ARMS were identified as the main cause of spastic paraplegia, intellectual disability, nystagmus, and obesity (SINO) syndrome, a rare disease with birth defects in brachycephaly, neurological disorder, and obesity. The cause of neural cell dysfunction by KIDINS220/ARMS were extensively studied while the cause of obesity in SINO syndrome remains elusive. Here, we identified KIDINS220/ARMS as an adipocyte differentiation-regulating gene. A Chinese family, mother and her two sons, all showed severe symptoms of SINO syndrome. G-banding karyotyping, chromosome microarray analysis, and whole exome sequencing revealed a novel amber mutation, c.3934G>T (p. E1312X), which was close to the C-terminal region of KIDINS220/ARMS and resulted in the premature of the protein. Both the mRNA and protein levels of KIDINS220/ARMS gradually decreased during adipocyte differentiation. Knockdown of KINDINS220/ARMS could prompt adipocyte differentiation and lipid accumulation while overexpression of KIDINS220/ARMS decrease the rate of matured adipocytes. Furthermore, we demonstrated that KIDINS220/ARMS inhibits adipocyte maturation through sustained extracellular signal-regulated kinase signaling. In conclusion, this is the first report about a vertical heredity of severe dominant pathogenic mutation of KIDINS220/ARMS, suggested that KIDINS220/ARMS played a negative role in adipocyte maturation, explained the cause of obesity in SINO syndrome and could highlight the importance of adipocyte differentiation in neuron functions.
Collapse
Affiliation(s)
- Kaihui Zhang
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China
| | - Wenxing Sun
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, China
| | - Yi Liu
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, China
| | - Yuqiang Lv
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, China
| | - Daisen Hou
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China
| | - Yan Lin
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, Institutes of Biomedical Sciences and Collaborative Innovation Center of Genetics and Development, Fudan University, Shanghai, China
| | - Wei Xu
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, Institutes of Biomedical Sciences and Collaborative Innovation Center of Genetics and Development, Fudan University, Shanghai, China
| | - Jianyuan Zhao
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, Institutes of Biomedical Sciences and Collaborative Innovation Center of Genetics and Development, Fudan University, Shanghai, China
| | - Zhongtao Gai
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, China
| | - Shimin Zhao
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China.,Key Laboratory of Reproduction Regulation of NPFPC, Institutes of Biomedical Sciences and Collaborative Innovation Center of Genetics and Development, Fudan University, Shanghai, China
| | - Yiyuan Yuan
- The Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China.,State Key Lab of Genetic Engineering and School of Life Sciences, Fudan University, Shanghai, China
| |
Collapse
|
2
|
Central Nervous System Responses of the Oriental migratory, Locusta migratoria manilensis, to Fungal Infection. Sci Rep 2017; 7:10340. [PMID: 28871168 PMCID: PMC5583336 DOI: 10.1038/s41598-017-10622-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 08/11/2017] [Indexed: 02/07/2023] Open
Abstract
Responses of the central nervous system (CNS) to microbial challenge and the interplay between the CNS and the immune system are important for defending against pathogen attack. We have examined the CNS transcriptional response of Locusta migratoria manilensis to infection by the locust-specific fungal pathogen, Metarhizium acridum. CNS responses were examined during spore attachment, fungal germination and pre-penetration of the cuticle, and cuticle penetration/hemocoel ingress and proliferation. Effects were seen at the earliest time points (4 h post-infection) and the number of differentially expressed genes (DEGs) was highest during late mycosis (72 h post-infection). Significantly affected neurological pathways included genes involved in serotonergic, cholinergic, dopaminergic, GABAergic, and glutamergic synapse responses, as well as pathways responsible for synaptic vesicle cycle, long-term potentiation and depression, and neurotrophin and retrograde endocannabinoid signaling. In addition, a significant number of immune related DEGs were identified. These included components of the Toll, Imd and JAK/STAT pathways, consistent with interactions between the CNS and immune systems. The activation of immune response related CNS genes during early stage infection highlights the rapid detection of microbial pathogens and suggests an important role for the CNS in modulating immunity potentially via initiating behavioral adaptations along with innate immune responses.
Collapse
|
3
|
Singha UK, Hamilton V, Chaudhuri M. Tim62, a Novel Mitochondrial Protein in Trypanosoma brucei, Is Essential for Assembly and Stability of the TbTim17 Protein Complex. J Biol Chem 2015; 290:23226-39. [PMID: 26240144 DOI: 10.1074/jbc.m115.663492] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Indexed: 11/06/2022] Open
Abstract
Trypanosoma brucei, the causative agent of human African trypanosomiasis, possesses non-canonical mitochondrial protein import machinery. Previously, we characterized the essential translocase of the mitochondrial inner membrane (TIM) consisting of Tim17 in T. brucei. TbTim17 is associated with TbTim62. Here we show that TbTim62, a novel protein, is localized in the mitochondrial inner membrane, and its import into mitochondria depends on TbTim17. Knockdown (KD) of TbTim62 decreased the steady-state levels of TbTim17 post-transcriptionally. Further analysis showed that import of TbTim17 into mitochondria was not inhibited, but its half-life was reduced >4-fold due to TbTim62 KD. Blue-native gel electrophoresis revealed that TbTim62 is present primarily in ∼150-kDa and also in ∼1100-kDa protein complexes, whereas TbTim17 is present in multiple complexes within the range of ∼300 to ∼1100 kDa. TbTim62 KD reduced the levels of both TbTim62 as well as TbTim17 protein complexes. Interestingly, TbTim17 was accumulated as lower molecular mass complexes in TbTim62 KD mitochondria. Furthermore, depletion of TbTim62 hampered the assembly of the ectopically expressed TbTim17-2X-myc into TbTim17 protein complex. Co-immunoprecipitation analysis revealed that association of TbTim17 with mHSP70 was markedly reduced in TbTim62 KD mitochondria. All together our results demonstrate that TbTim62, a unique mitochondrial protein in T. brucei, is required for the formation of a stable TbTim17 protein complex. TbTim62 KD destabilizes this complex, and unassembled TbTim17 degrades. Therefore, TbTim62 acts as a novel regulatory factor to maintain the levels of TIM in T. brucei mitochondria.
Collapse
Affiliation(s)
- Ujjal K Singha
- From the Department of Microbiology and Immunology, Meharry Medical College, Nashville, Tennessee 37208
| | - VaNae Hamilton
- From the Department of Microbiology and Immunology, Meharry Medical College, Nashville, Tennessee 37208
| | - Minu Chaudhuri
- From the Department of Microbiology and Immunology, Meharry Medical College, Nashville, Tennessee 37208
| |
Collapse
|