1
|
Teng H, Chen S, Liu F, Teng Y, Li Y, Liang D, Wu L, Li Z. O-Sialoglycoprotein Endopeptidase Deficiency Impairs Proteostasis and Induces Autophagy in Human Embryonic Stem Cells. Int J Mol Sci 2024; 25:7889. [PMID: 39063131 PMCID: PMC11277037 DOI: 10.3390/ijms25147889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 07/08/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024] Open
Abstract
The OSGEP gene encodes O-sialoglycoprotein endopeptidase, a catalytic unit of the highly conserved KEOPS complex (Kinase, Endopeptidase, and Other Proteins of small Size) that regulates the second biosynthetic step in the formation of N-6-threonylcarbamoyladenosine (t6A). Mutations in KEOPS cause Galloway-Mowat syndrome (GAMOS), whose cellular function in mammals and underlying molecular mechanisms are not well understood. In this study, we utilized lentivirus-mediated OSGEP knockdown to generate OSGEP-deficient human embryonic stem cells (hESCs). OSGEP-knockdown hESCs exhibited reduced stemness factor expression and G2/M phase arrest, indicating a potential role of OSGEP in the regulation of hESC fate. Additionally, OSGEP silencing led to enhanced protein synthesis and increased aggregation of proteins, which further induced inappropriate autophagy, as evidenced by the altered expression of P62 and the conversion of LC3-I to LC3-II. The above findings shed light on the potential involvement of OSGEP in regulating pluripotency and differentiation in hESCs while simultaneously highlighting its crucial role in maintaining proteostasis and autophagy, which may have implications for human disease.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Lingqian Wu
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China; (H.T.); (S.C.); (F.L.); (Y.T.); (Y.L.); (D.L.)
| | - Zhuo Li
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China; (H.T.); (S.C.); (F.L.); (Y.T.); (Y.L.); (D.L.)
| |
Collapse
|
2
|
Wang Y, He QN. [Research progress on monogenic inherited glomerular diseases with central nervous system symptoms]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2024; 26:652-658. [PMID: 38926384 DOI: 10.7499/j.issn.1008-8830.2312054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
To date, approximately 500 monogenic inherited kidney diseases have been reported, with more than 50 genes associated with the pathogenesis of monogenic isolated or syndromic nephrotic syndrome. Most of these genes are expressed in podocytes of the glomerulus. Neurological symptoms are common extrarenal manifestations of syndromic nephrotic syndrome, and various studies have found connections between podocytes and neurons in terms of morphology and function. This review summarizes the genetic and clinical characteristics of monogenic inherited diseases with concomitant glomerular and central nervous system lesions, aiming to enhance clinicians' understanding of such diseases, recognize the importance of genetic diagnostic techniques for comorbidity screening, and reduce the rates of missed diagnosis and misdiagnosis.
Collapse
Affiliation(s)
- Ying Wang
- Department of Pediatrics, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | | |
Collapse
|
3
|
Esmaeilzadeh E, Moradi A, Khorram Khorshid HR. Whole-exome sequencing revealed a novel homozygous missense variant in OSGEP gene: a case report of Galloway-Mowat syndrome in Iran. CEN Case Rep 2023; 12:374-377. [PMID: 36856752 PMCID: PMC10620368 DOI: 10.1007/s13730-023-00775-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 01/30/2023] [Indexed: 03/02/2023] Open
Abstract
Galloway-Mowat syndrome is a rare autosomal-recessive genetic disorder that is characterized by variety of complications such as neurological abnormalities and early-onset progressive kidney disease. Studies have been shown that pathogenic mutations in genes that belong to the KEOPS complex lead to Galloway-Mowat syndrome. Several pathogenic mutations in OSGEP gene, a member of the KEOPS complex, have been detected in Galloway-Mowat syndrome. Here we describe a 12-year-old male with intellectual disability, poor speech, seizures, microcephaly, and nephrotic syndrome that were in favor of Galloway-Mowat syndrome, born to a healthy Iranian consanguineous parents. Extracted genomic DNA from blood sample was used to perform whole-exome sequencing in the patient. The mutational screening revealed a novel homozygote OSGEP gene missense variant. Our finding established whole-exome sequencing as a valuable technic for the detection of rare variants.
Collapse
Affiliation(s)
| | - Arman Moradi
- Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | | |
Collapse
|
4
|
Wagner A, Schosserer M. The epitranscriptome in ageing and stress resistance: A systematic review. Ageing Res Rev 2022; 81:101700. [PMID: 35908668 DOI: 10.1016/j.arr.2022.101700] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/15/2022] [Accepted: 07/25/2022] [Indexed: 01/31/2023]
Abstract
Modifications of RNA, collectively called the "epitranscriptome", might provide novel biomarkers and innovative targets for interventions in geroscience but are just beginning to be studied in the context of ageing and stress resistance. RNA modifications modulate gene expression by affecting translation initiation and speed, miRNA binding, RNA stability, and RNA degradation. Nonetheless, the precise underlying molecular mechanisms and physiological consequences of most alterations of the epitranscriptome are still only poorly understood. We here systematically review different types of modifications of rRNA, tRNA and mRNA, the methodology to analyze them, current challenges in the field, and human disease associations. Furthermore, we compiled evidence for a connection between individual enzymes, which install RNA modifications, and lifespan in yeast, worm and fly. We also included resistance to different stressors and competitive fitness as search criteria for genes potentially relevant to ageing. Promising candidates identified by this approach include RCM1/NSUN5, RRP8, and F33A8.4/ZCCHC4 that introduce base methylations in rRNA, the methyltransferases DNMT2 and TRM9/ALKBH8, as well as factors involved in the thiolation or A to I editing in tRNA, and finally the m6A machinery for mRNA.
Collapse
Affiliation(s)
- Anja Wagner
- Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Markus Schosserer
- Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria; Institute of Medical Genetics, Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| |
Collapse
|
5
|
Xu S, Hu L, Yang L, Wu B, Cao Y, Zhang R, Xu X, Ma H, Zhou W, Cheng G, Zhang P, Hu L. Galloway-Mowat Syndrome Type 3 Caused by OSGEP Gene Variants: A Case Report and Literature Review. Front Pediatr 2022; 10:899991. [PMID: 35783322 PMCID: PMC9249162 DOI: 10.3389/fped.2022.899991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 05/25/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Galloway-Mowat syndrome type 3 (GAMOS3) is an extremely rare and severe autosomal-recessive disease characterized by early-onset nephrotic syndrome (NS), microcephaly and neurological impairment. Reported GAMOS cases have gradually increased since pathogenic OSGEP variants were identified as the aetiology in 2017. METHODS Using whole-exome sequencing and a data analysis process established by Children's Hospital of Fudan University, the clinical and molecular features of 3 infants with OSGEP mutations were summarized. Literature regarding the clinical features of GAMOS3 caused by OSGEP variants was reviewed. RESULTS Thirty-seven individuals (3 from this study) from 34 families were included. Twenty-two different OSGEP variants were identified. The c.740G>A (p.Arg247Gln) variant in OSGEP was detected in 15 families (44%), all from Asia. Most affected individuals (including patients I and II in this study) showed a typical phenotype, including microcephaly (92%) with brain anomalies (97%), developmental delay (81%), congenital NS (54%), and craniofacial (94%) and skeletal dysmorphism (84%). Renal manifestations varied from proteinuria (94%, median onset = 1.5 months) to NS (83%) and end-stage renal disease (48%, 11 months) during follow-up. Patients with congenital NS had a lower survival probability (median survival time = 3 months) than those without congenital NS (78 months) (P < 0.01, log-rank test). CONCLUSION GAMOS3 is a progressive renal-neurological syndrome with a poor prognosis, especially with congenital NS. Microcephaly with dysmorphic features are vital clues to further evaluate renal impairment and brain anomalies. Timely molecular diagnosis is crucial for clinical decision-making, appropriate treatment and genetic counselling.
Collapse
Affiliation(s)
- Suhua Xu
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Lan Hu
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Lin Yang
- Clinical Genetic Center, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,Shanghai Key Laboratory of Birth Defects, The Translational Medicine Center of Children Development and Disease of Fudan University, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Bingbing Wu
- Shanghai Key Laboratory of Birth Defects, The Translational Medicine Center of Children Development and Disease of Fudan University, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Yun Cao
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,Key Laboratory of Neonatal Diseases, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Rong Zhang
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Xin Xu
- Department of Neonatology, Xiamen Children's Hospital, Xiamen, China
| | - Haiyan Ma
- Department of Neonatology, Zhuhai Women and Children's Hospital, Zhuhai, China
| | - Wenhao Zhou
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,Clinical Genetic Center, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,Shanghai Key Laboratory of Birth Defects, The Translational Medicine Center of Children Development and Disease of Fudan University, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China.,Key Laboratory of Neonatal Diseases, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Guoqiang Cheng
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Peng Zhang
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Liyuan Hu
- Department of Neonatology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| |
Collapse
|