1
|
Banerjee S, Varga JK, Kumar M, Zoltsman G, Rotem-Bamberger S, Cohen-Kfir E, Isupov MN, Rosenzweig R, Schueler-Furman O, Wiener R. Structural study of UFL1-UFC1 interaction uncovers the role of UFL1 N-terminal helix in ufmylation. EMBO Rep 2023; 24:e56920. [PMID: 37988244 DOI: 10.15252/embr.202356920] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/23/2023] Open
Abstract
Ufmylation plays a crucial role in various cellular processes including DNA damage response, protein translation, and ER homeostasis. To date, little is known about how the enzymes responsible for ufmylation coordinate their action. Here, we study the details of UFL1 (E3) activity, its binding to UFC1 (E2), and its relation to UBA5 (E1), using a combination of structural modeling, X-ray crystallography, NMR, and biochemical assays. Guided by Alphafold2 models, we generate an active UFL1 fusion construct that includes its partner DDRGK1 and solve the crystal structure of this critical interaction. This fusion construct also unveiled the importance of the UFL1 N-terminal helix for binding to UFC1. The binding site suggested by our UFL1-UFC1 model reveals a conserved interface, and competition between UFL1 and UBA5 for binding to UFC1. This competition changes in the favor of UFL1 following UFM1 charging of UFC1. Altogether, our study reveals a novel, terminal helix-mediated regulatory mechanism, which coordinates the cascade of E1-E2-E3-mediated transfer of UFM1 to its substrate and provides new leads to target this modification.
Collapse
Affiliation(s)
- Sayanika Banerjee
- Department of Biochemistry and Molecular Biology, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Julia K Varga
- Department of Microbiology and Molecular Genetics, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Manoj Kumar
- Department of Biochemistry and Molecular Biology, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Guy Zoltsman
- Department of Chemical and Structural Biology, Weizmann Institute of Sciences, Rehovot, Israel
| | - Shahar Rotem-Bamberger
- Department of Microbiology and Molecular Genetics, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Einav Cohen-Kfir
- Department of Biochemistry and Molecular Biology, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Michail N Isupov
- The Henry Wellcome Building for Biocatalysis, Biosciences, University of Exeter, Exeter, UK
| | - Rina Rosenzweig
- Department of Chemical and Structural Biology, Weizmann Institute of Sciences, Rehovot, Israel
| | - Ora Schueler-Furman
- Department of Microbiology and Molecular Genetics, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Reuven Wiener
- Department of Biochemistry and Molecular Biology, The Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| |
Collapse
|
2
|
Yang X, Zhou T, Wang X, Xia Y, Cao X, Cheng X, Cao Y, Ma P, Ma H, Qin A, Zhao J. Loss of DDRGK1 impairs IRE1α UFMylation in spondyloepiphyseal dysplasia. Int J Biol Sci 2023; 19:4709-4725. [PMID: 37781516 PMCID: PMC10539710 DOI: 10.7150/ijbs.82765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 08/27/2023] [Indexed: 10/03/2023] Open
Abstract
Spondyloepiphyseal dysplasia (SEMD) is a rare disease in which cartilage growth is disrupted, and the DDRGK1 mutation is one of the causative genes. In our study, we established Ddrgk1fl/fl, Col2a1-ERT Cre mice, which showed a thickened hypertrophic zone (HZ) in the growth plate, simulating the previous reported SEMD pathology in vivo. Instead of the classical modulation mechanism towards SOX9, our further mechanism study found that DDRGK1 stabilizes the stress sensor endoplasmic reticulum-to-nucleus signaling 1 (IRE1α) to maintain endoplasmic reticulum (ER) homoeostasis. The loss of DDRGK1 decreased the UFMylation and subsequently led to increased ubiquitylation-mediated IRE1α degradation, causing ER dysfunction and activating the PERK/CHOP/Caspase3 apoptosis pathway. Further DDRGK1 K268R-mutant mice revealed the importance of K268 UFMylation site in IRE1α degradation and subsequent ER dysfunction. In conclusion, DDRGK1 stabilizes IRE1α to ameliorate ER stress and following apoptosis in chondrocytes, which finally promote the normal chondrogenesis.
Collapse
Affiliation(s)
- Xiao Yang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tangjun Zhou
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin Wang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Xia
- Institute of Precision Medicine, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiankun Cao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaofei Cheng
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Cao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Precision Medicine, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Peixiang Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - An Qin
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Zhao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
3
|
Franceschi R, Iascone M, Maitz S, Marchetti D, Mariani M, Selicorni A, Soffiati M, Maines E. A missense mutation in DDRGK1 gene associated to Shohat-type spondyloepimetaphyseal dysplasia: Two case reports and a review of literature. Am J Med Genet A 2022; 188:2434-2437. [PMID: 35670300 DOI: 10.1002/ajmg.a.62857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/03/2022] [Accepted: 05/12/2022] [Indexed: 12/17/2022]
Abstract
Spondylo-epi-metaphyseal dysplasia Shohat type (SEMDSH, OMIM # 602557) is a rare skeletal dysplasia. Until recently, only eight patients of five families have been reported. The disorder is characterized by severely disproportionate short stature with a short neck, small trunk with abdominal distension, and short lower limbs. Joint laxity and bowed legs are seen. The same homozygous splicing pathogenic variant in the DDRGK1 gene was found in four Iraqi families. Here we report a homozygous missense pathogenic variant in DDRGK1 in two children from unrelated two Moroccan families. The clinical and radiological phenotypes of the affected children were similar to those previously described.
Collapse
Affiliation(s)
| | - Maria Iascone
- Medical Genetics Laboratory, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Silvia Maitz
- Genetic Unit, Pediatric Clinic, Fondazione MBBM, S. Gerardo Hospital, Monza, Italy
| | - Daniela Marchetti
- Medical Genetics Laboratory, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Milena Mariani
- Pediatric Units, ASST Lariana, S.Fermo della Battaglia (CO), Italy
| | - Angelo Selicorni
- Pediatric Units, ASST Lariana, S.Fermo della Battaglia (CO), Italy
| | | | - Evelina Maines
- Pediatric Department, S. Chiara General Hospital, Trento, Italy
| |
Collapse
|
4
|
Chen F, Xing C, Zhang W, Li J, Hu T, Li L, Li H, Cai Y. Salubrinal, a novel inhibitor of eIF-2α dephosphorylation, promotes erythropoiesis at early stage targeted by ufmylation pathway. J Cell Physiol 2019; 234:18560-18570. [PMID: 30908643 DOI: 10.1002/jcp.28493] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 11/08/2022]
Abstract
Ufmylation was proved to play a crucial role in hematopoietic stem cell (HSC) survival and erythroid differentiation, ufmylation deficiency induces acute anemia and lethality of embryos and adults in mouse models. To screen some compounds to rescue phenotypes induced by gene deletion, in this study, we used DDRGK1F/F ; CreERT2 conditional knockout mice, DDRGK1F/F ; CreERT2 bone marrow (BM) and fetal liver cells (FL), Uba5, and DDRGK1 knockdown human CD34 cell in vivo and in vitro, we found salubrinal, a novel inhibitor of eIF-2α dephosphorylation, promoted erythropoiesis at early stage, and partly rescued the acute anemia induce by DDRGK1 deficiency through upregulation of ufmylation and erythroid transcription factors. In phenylhydrazine (PHZ)-induced hemolytic anemia mice, interestingly, salubrinal could significantly improve hemocrit and red blood cell (RBC) indices of the mice treated with PHZ via upregulation of ufmylation. Its novel function was verified to attenuate unfolded protein response (UPR) and cell death programs, and to keep endoplasmic reticulum (ER) homeostasis in HSCs. Taken together results, it suggested that salubrinal may be a promising antianemic agent targeted by ufmylation.
Collapse
Affiliation(s)
- Fanghui Chen
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Chaofeng Xing
- College of Life Sciences, Anhui Normal University, Wuhu, China
| | - Wei Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jun Li
- College of Life Sciences, Anhui Normal University, Wuhu, China
| | - Tianxiang Hu
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Lian Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Honglin Li
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia.,Shanghai 10th Hospital, Shanghai, China
| | - Yafei Cai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.,Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia
| |
Collapse
|
5
|
Lin JX, Xie XS, Weng XF, Zheng CH, Xie JW, Wang JB, Lu J, Chen QY, Cao LL, Lin M, Tu RH, Li P, Huang CM. Low expression of CDK5RAP3 and DDRGK1 indicates a poor prognosis in patients with gastric cancer. World J Gastroenterol 2018; 24:3898-3907. [PMID: 30228783 PMCID: PMC6141336 DOI: 10.3748/wjg.v24.i34.3898] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 06/11/2018] [Accepted: 06/25/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the effects of different levels of expression of CDK5RAP3 and DDRGK1 on long-term survival of patients undergoing radical gastrectomy.
METHODS The expression of CDK5RAP3 and DDRGK1 was detected by immunohistochemistry in 135 patients who received standard gastrectomy were enrolled in the study. Western Blot was used to detect the expression of CDK5RAP3 and DDRGK1 in gastric cancer and its adjacent tissues and cell lines. The correlations between the expression of CDK5RAP3 and DDRGK1 and clinicopathological factors were analyzed, and the value of each parameter to the prognosis of the patients was compared. Receiver operating characteristic analysis was used to compare the accuracy of the prediction of clinical outcome by the parameters.
RESULTS CDK5RAP3 and DDRGK1 expression was down-regulated in the gastric cancer compared to its respective adjacent non-tumor tissues. The expression of CDK5RAP3 was closely related to the age of the patients (P = 0.035) and the T stage of the tumor (P = 0.017). The expression of DDRGK1 was correlated with the sex of the patients (P = 0.080), the degree of tumor differentiation (P = 0.036), the histological type (P = 0.036) and the N stage of the tumor (P = 0.014). Low expression CDK5RAP3 or DDRGK1 is a poor prognostic factor for gastric cancer patients. Prognostic analysis showed that the co-expression of CDK5RAP3 and DDRGK1 was an independent prognostic factor correlating with the overall survival of gastric cancer patients. Combined expression analysis of CDK5RAP3 and DDRGK1 may provide a more accurate prognostic value for overall survival.
CONCLUSION The co-expression of CDK5RAP3 and DDRGK1 is an independent prognostic factor for gastric cancer, which can provide a more accurate model for the long-term prognosis.
Collapse
Affiliation(s)
- Jian-Xian Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Xin-Sheng Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Xiong-Feng Weng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Chao-Hui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Jian-Wei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Jia-Bin Wang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Jun Lu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Qi-Yue Chen
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Long-Long Cao
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Mi Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Ru-Hong Tu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| | - Chang-Ming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, Fujian Province, China
- Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350108, Fujian Province, China
- Fujian Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou 350108, Fujian Province, China
| |
Collapse
|
6
|
Zou M, Li R, Wang JY, Wang K, Wang YN, Li Y, Ji FX, Sun SN, Huang SS, Fan HH, Huang CP, Zhang X, Zhu JH. Association analyses of variants of SIPA1L2, MIR4697, GCH1, VPS13C, and DDRGK1 with Parkinson's disease in East Asians. Neurobiol Aging 2018; 68:159.e7-159.e14. [PMID: 29622492 DOI: 10.1016/j.neurobiolaging.2018.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 01/29/2018] [Accepted: 03/03/2018] [Indexed: 12/19/2022]
Abstract
A recent large-scale European-originated genome-wide association data meta-analysis followed by a replication study identified 6 new risk loci for Parkinson's disease (PD), which include rs10797576/SIPA1L2, rs117896735/INPP5F, rs329648/MIR4697, rs11158026/GCH1, rs2414739/VPS13C, and rs8118008/DDRGK1. However, whether these new loci are associated with PD in Asian populations remain elusive. The INPP5F is nonpolymorphic in Asians. The present study aimed to understand the effects of the other 5 new loci in a Han Chinese population comprising 579 sporadic PD patients and 642 controls. Significant associations with PD were observed in the variants of SIPA1L2 (p = 0.001) and VPS13C (p = 0.007), where the T (odd ratio [OR] = 1.484, 95% confidence interval [CI] 1.186-1.858) and A (OR = 1.362, 95% CI 1.087-1.707) alleles serve as the risk alleles, respectively. The genotype distributions in the SIPA1L2 and VPS13C variants were also different between the patients and controls (p = 0.002 and p = 0.023, respectively). In contrast, no significant association with PD was found in the variants of MIR4697, GCH1, and DDRGK1 either in allele or genotype frequencies. Noteworthy, a followed meta-analysis of East Asian studies suggested an association of the GCH1 variant with PD (p = 0.04, OR 1.08, 95% CI 1.00-1.16), while the other results are in line with those of our cohort. In conclusion, our study together with meta-analyses demonstrates that the variants of SIPA1L2 and VPS13C, potentially GCH1, but not of MIR4697 and DDRGK1, are associated with PD susceptibility in East Asians.
Collapse
Affiliation(s)
- Ming Zou
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Rui Li
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jian-Yong Wang
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ke Wang
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ya-Nan Wang
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yang Li
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Fei-Xue Ji
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Sheng-Nan Sun
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Shi-Shi Huang
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Hui-Hui Fan
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chen-Ping Huang
- Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiong Zhang
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Jian-Hong Zhu
- Department of Geriatrics and Neurology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; Department of Preventive Medicine, School of Public Health, Wenzhou Medical University, Wenzhou, Zhejiang, China; Key Laboratory of Watershed Science and Health of Zhejiang Province, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| |
Collapse
|
7
|
Miller C, Cai Y, Patton T, Graves SH, Li H, Sabbatini ME. RCAD/BiP pathway is necessary for the proper synthesis of digestive enzymes and secretory function of the exocrine pancreas. Am J Physiol Gastrointest Liver Physiol 2017; 312:G314-G326. [PMID: 28104585 DOI: 10.1152/ajpgi.00176.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 01/11/2017] [Accepted: 01/16/2017] [Indexed: 02/07/2023]
Abstract
Alcoholism causes an imbalance of endoplasmic reticulum (ER) homeostasis in pancreatic acini. In those cells, the ER is involved in the synthesis and folding of pancreatic enzymes. Ubiquitin-fold modifier 1 (Ufm1) is part of a novel ubiquitin-like modification system involved in maintaining ER homeostasis. Among the components of the Ufm1 system, Regulator of C53 and DDRGK1 (RCAD) has recently been identified as a Ufm1-specific E3 ligase that promotes ufmylation of DDRGK1, an RCAD-interacting protein. We determined the importance of RCAD in the proper synthesis and secretion of pancreatic enzymes using mice with genetically deleted RCAD. The pancreas of RCAD-deficient mice was of normal size and histology. Using quantitative PCR and Western blotting, we found that amylase was upregulated in pancreas organs from RCAD-knockout (KO) mice. Constitutive amylase secretion was much higher in isolated pancreatic acini from RCAD KO mice, whereas CCK-stimulated amylase secretion was disturbed. RCAD deficiency caused a downregulation in expression of ER chaperone BiP, which affected ER homeostasis and activated both apoptosis and trypsin. We also found that both RCAD and DDRGK1 transcript levels were upregulated in pancreatic acini from alcohol-preferring rats. Elevated expression of RCAD and DDRGK1 was associated with increased ER stress and UPR activation. Because of the lack of BiP expression, caspase 3 and trypsin activation we enhanced in RCAD-deficient pancreatic acini upon treatment with ethanol and CCK. In conclusion, the RCAD/BiP pathway is required for proper synthesis and secretion of pancreatic enzymes. In alcoholism, increased levels of components of the Ufm1 system could prevent the deleterious effects of alcohol in the pancreas by regulating BiP levels.NEW & NOTEWORTHY RCAD/BiP pathway is required for the proper synthesis and secretion of amylase from pancreatic acini, as well as for the maintenance of the ER homeostasis. In alcoholism, the exocrine pancreas could increase the levels of components of the Ufm1 system to protect itself from alcohol's deleterious effects by regulating the expression of ER chaperone BiP.
Collapse
Affiliation(s)
- Camille Miller
- Department of Biological Sciences, Augusta University, Augusta, Georgia
| | - Yafei Cai
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Cancer Center, Augusta University, Augusta, Georgia; and
| | - Tadd Patton
- Department of Psychological Sciences, Augusta University, Augusta, Georgia
| | | | - Honglin Li
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Cancer Center, Augusta University, Augusta, Georgia; and
| | | |
Collapse
|
8
|
Neziri D, Pajenda S, Amuge R, Ilhan A, Wewalka M, Hörmann G, Zauner C, Wagner L. DDRGK1 in urine indicative of tubular cell injury in intensive care patients with serious infections. J Nephropathol 2016; 5:65-71. [PMID: 27152292 PMCID: PMC4844911 DOI: 10.15171/jnp.2016.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 03/12/2016] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Acute kidney injury (AKI) is a life threatening condition. Despite intensive care treatment the occurrence cannot be predicted as very little indicators exist for direct measurement when tubular epithelial cell injury takes place. We therefore searched for novel peptide indicators expressed at intracellular level at the proximal kidney tubule for its appearance in urine samples. OBJECTIVES Establishing a test for urinary C20orf116 protein measurement. PATIENTS AND METHODS Generation of immunoreagents against C20orf116 also named DDRGK1. These were used to measure its presence in urine collected at 8-24 hours interval in a prospective study from 99 ICU patients at 4-6 time points. These patients received therapy because of serious infection and were categorized into 4 groups. RESULTS 1) Ten tested highly for C20orf116 undergoing AKI graded Failure or Loss (3210 ± 4268 ng/mL) according to RIFLE criteria, all requiring renal replacement therapy (RRT) out of them 9 died. 2) Six patients with pre-existing kidney disease developed AKI and required RRT but had much lower C20orf116 levels of (33 ± 19), two of them died. 3) In contrast, out of 11 patients undergoing AKI grade Risk or Injury, four tested positive for C20orf116 but to much lower extent (66 ± 43) who recovered fully. 4) Out of 72 patients 25 tested positive (18 ± 12 ng/mL) not fulfilling criteria of AKI but with serum creatinine (sCr) rises of 1.2-1.4 (n = 52). Healthy donors (n = 48) showed no detectable C20orf116 at any time point. CONCLUSIONS C20orf116 excretion was detectable more than 24 hours before sCr rise could be measured; high level seemed to indicate severity of organ failure.
Collapse
Affiliation(s)
- Dashurie Neziri
- Department of Internal Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Sahra Pajenda
- Department of Internal Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Rebecca Amuge
- Ugandan Christian University of Mbale, Mbale, Uganda
| | - Aysegul Ilhan
- Department of Internal Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Marlene Wewalka
- Division of Intensive Care 13H1, Medical University of Vienna, Vienna, Austria
| | - Gregor Hörmann
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Christian Zauner
- Division of Intensive Care 13H1, Medical University of Vienna, Vienna, Austria
| | - Ludwig Wagner
- Department of Internal Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| |
Collapse
|