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Cybulsky AV, Papillon J, Bryan C, Navarro‐Betancourt JR, Sabourin LA. Role of the Ste20-like kinase SLK in podocyte adhesion. Physiol Rep 2024; 12:e15897. [PMID: 38163671 PMCID: PMC10758337 DOI: 10.14814/phy2.15897] [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: 10/13/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 01/03/2024] Open
Abstract
SLK controls the cytoskeleton, cell adhesion, and migration. Podocyte-specific deletion of SLK in mice leads to podocyte injury as mice age and exacerbates injury in experimental focal segment glomerulosclerosis (FSGS; adriamycin nephrosis). We hypothesized that adhesion proteins may be substrates of SLK. In adriamycin nephrosis, podocyte ultrastructural injury was exaggerated by SLK deletion. Analysis of a protein kinase phosphorylation site dataset showed that podocyte adhesion proteins-paxillin, vinculin, and talin-1 may be potential SLK substrates. In cultured podocytes, deletion of SLK increased adhesion to collagen. Analysis of paxillin, vinculin, and talin-1 showed that SLK deletion reduced focal adhesion complexes (FACs) containing these proteins mainly in adriamycin-induced injury; there was no change in FAC turnover (focal adhesion kinase Y397 phosphorylation). In podocytes, paxillin S250 showed basal phosphorylation that was slightly enhanced by SLK; however, SLK did not phosphorylate talin-1. In adriamycin nephrosis, SLK deletion did not alter glomerular expression/localization of talin-1 and vinculin, but increased focal adhesion kinase phosphorylation modestly. Therefore, SLK decreases podocyte adhesion, but FAC proteins in podocytes are not major substrates of SLK in health and disease.
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Affiliation(s)
- Andrey V. Cybulsky
- Department of MedicineMcGill University Health Centre Research Institute, McGill UniversityMontrealQuebecCanada
| | - Joan Papillon
- Department of MedicineMcGill University Health Centre Research Institute, McGill UniversityMontrealQuebecCanada
| | - Craig Bryan
- Department of MedicineMcGill University Health Centre Research Institute, McGill UniversityMontrealQuebecCanada
| | - José R. Navarro‐Betancourt
- Department of MedicineMcGill University Health Centre Research Institute, McGill UniversityMontrealQuebecCanada
| | - Luc A. Sabourin
- Ottawa Hospital Research Institute, Cancer TherapeuticsOttawaOntarioCanada
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Garland B, Delisle S, Al-Zahrani KN, Pryce BR, Sabourin LA. The Ste20-like kinase - a Jack of all trades? J Cell Sci 2021; 134:261804. [PMID: 33961052 DOI: 10.1242/jcs.258269] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Over the past 20 years, the Ste20-like kinase (SLK; also known as STK2) has emerged as a central regulator of cytoskeletal dynamics. Reorganization of the cytoskeleton is necessary for a plethora of biological processes including apoptosis, proliferation, migration, tissue repair and signaling. Several studies have also uncovered a role for SLK in disease progression and cancer. Here, we review the recent findings in the SLK field and summarize the various roles of SLK in different animal models and discuss the biochemical mechanisms regulating SLK activity. Together, these studies have revealed multiple roles for SLK in coupling cytoskeletal dynamics to cell growth, in muscle repair and in negative-feedback loops critical for cancer progression. Furthermore, the ability of SLK to regulate some systems appears to be kinase activity independent, suggesting that it may be an important scaffold for signal transduction pathways. These various findings reveal highly complex functions and regulation patterns of SLK in development and disease, making it a potential therapeutic target.
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Affiliation(s)
- Brennan Garland
- Ottawa Hospital Research Institute, Cancer Therapeutics, Ottawa, Ontario, K1H8L1, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, K1H8L6, Canada
| | - Samuel Delisle
- Ottawa Hospital Research Institute, Cancer Therapeutics, Ottawa, Ontario, K1H8L1, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, K1H8L6, Canada
| | - Khalid N Al-Zahrani
- Center for Molecular and Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, M5G1X5, Canada
| | - Benjamin R Pryce
- Department of Pediatrics, Hollings Cancer Center, Medical University of South Carolina,Charleston, SC 29425, USA
| | - Luc A Sabourin
- Ottawa Hospital Research Institute, Cancer Therapeutics, Ottawa, Ontario, K1H8L1, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, K1H8L6, Canada
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Shi YY, Zhang J, Zhang T, Zhou M, Wang Y, Zhang HJ, Ding SG. Cellular stress and redox activity proteins are involved in gastric carcinogenesis associated with Helicobacter pylori infection expressing high levels of thioredoxin-1. J Zhejiang Univ Sci B 2018; 19:750-763. [PMID: 30269443 PMCID: PMC6194355 DOI: 10.1631/jzus.b1700456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 02/07/2018] [Indexed: 12/12/2022]
Abstract
Helicobacter pylori infection is related to the development of gastric diseases. Our previous studies showed that high thioredoxin-1 (Trx1) expression in H. pylori can promote gastric carcinogenesis. To explore the underlying molecular mechanisms, we performed an isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomic analysis of stomach tissues from Mongolian gerbil infected with H. pylori expressing high and low Trx1. Differences in the profiles of the expressed proteins were analyzed by bioinformatics and verified using Western blot analysis. We found three candidate proteins, 14-3-3α/β, glutathione-S-transferase (GST), and heat shock protein 70 (HSP70), in high Trx1 tissues compared with low Trx1 tissues and concluded that cellular stress and redox activity-related proteins were involved in the pathogenesis of gastric cancer associated with H. pylori Trx1.
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Affiliation(s)
- Yan-yan Shi
- Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing 100191, China
| | - Jing Zhang
- Department of Gastroenterology, Peking University Third Hospital, Beijing 100191, China
| | - Ting Zhang
- Department of Microbiology, Peking University Health Science Center, Beijing 100191, China
| | - Man Zhou
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Ye Wang
- Department of Gastroenterology, Peking University Third Hospital, Beijing 100191, China
| | - He-jun Zhang
- Department of Gastroenterology, Peking University Third Hospital, Beijing 100191, China
| | - Shi-gang Ding
- Department of Gastroenterology, Peking University Third Hospital, Beijing 100191, China
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Yee A, Papillon J, Guillemette J, Kaufman DR, Kennedy CRJ, Cybulsky AV. Proteostasis as a therapeutic target in glomerular injury associated with mutant α-actinin-4. Am J Physiol Renal Physiol 2018; 315:F954-F966. [PMID: 29873512 DOI: 10.1152/ajprenal.00082.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Mutations in α-actinin-4 (actinin-4) result in hereditary focal segmental glomerulosclerosis (FSGS) in humans. Actinin-4 mutants induce podocyte injury because of dysregulation of the cytoskeleton and proteotoxicity. Injury may be associated with endoplasmic reticulum (ER) stress and polyubiquitination of proteins. We assessed if the chemical chaperone 4-phenylbutyrate (4-PBA) can ameliorate the proteotoxicity of an actinin-4 mutant. Actinin-4 K255E, which causes FSGS in humans (K256E in the mouse), showed enhanced ubiquitination, accelerated degradation, aggregate formation, and enhanced association with filamentous (F)-actin in glomerular epithelial cells (GECs). The mutant disrupted ER function and stimulated autophagy. 4-PBA reduced actinin-4 K256E aggregation and its tight association with F-actin. Transgenic mice that express actinin-4 K256E in podocytes develop podocyte injury, proteinuria, and FSGS in association with glomerular ER stress. Treatment of these mice with 4-PBA in the drinking water over a 10-wk period significantly reduced albuminuria and ER stress. Another drug, celastrol, which enhanced expression of ER and cytosolic chaperones in GECs, tended to reduce actinin-4 aggregation but did not decrease the tight association of actinin-4 K256E with F-actin and did not reduce albuminuria in actinin-4 K256E transgenic mice. Thus, chemical chaperones, such as 4-PBA, may represent a novel therapeutic approach to certain hereditary glomerular diseases.
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Affiliation(s)
- Albert Yee
- Department of Medicine, McGill University Health Centre Research Institute, McGill University , Montreal, Quebec , Canada
| | - Joan Papillon
- Department of Medicine, McGill University Health Centre Research Institute, McGill University , Montreal, Quebec , Canada
| | - Julie Guillemette
- Department of Medicine, McGill University Health Centre Research Institute, McGill University , Montreal, Quebec , Canada
| | - Daniel R Kaufman
- Department of Medicine, McGill University Health Centre Research Institute, McGill University , Montreal, Quebec , Canada
| | - Chris R J Kennedy
- Kidney Research Centre, Department of Medicine, The Ottawa Hospital, University of Ottawa , Ottawa, Ontario , Canada
| | - Andrey V Cybulsky
- Department of Medicine, McGill University Health Centre Research Institute, McGill University , Montreal, Quebec , Canada
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Kim J, Shimizu C, Kingsmore SF, Veeraraghavan N, Levy E, Ribeiro dos Santos AM, Yang H, Flatley J, Hoang LT, Hibberd ML, Tremoulet AH, Harismendy O, Ohno-Machado L, Burns JC. Whole genome sequencing of an African American family highlights toll like receptor 6 variants in Kawasaki disease susceptibility. PLoS One 2017; 12:e0170977. [PMID: 28151979 PMCID: PMC5289527 DOI: 10.1371/journal.pone.0170977] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/13/2017] [Indexed: 12/18/2022] Open
Abstract
Kawasaki disease (KD) is the most common acquired pediatric heart disease. We analyzed Whole Genome Sequences (WGS) from a 6-member African American family in which KD affected two of four children. We sought rare, potentially causative genotypes by sequentially applying the following WGS filters: sequence quality scores, inheritance model (recessive homozygous and compound heterozygous), predicted deleteriousness, allele frequency, genes in KD-associated pathways or with significant associations in published KD genome-wide association studies (GWAS), and with differential expression in KD blood transcriptomes. Biologically plausible genotypes were identified in twelve variants in six genes in the two affected children. The affected siblings were compound heterozygous for the rare variants p.Leu194Pro and p.Arg247Lys in Toll-like receptor 6 (TLR6), which affect TLR6 signaling. The affected children were also homozygous for three common, linked (r2 = 1) intronic single nucleotide variants (SNVs) in TLR6 (rs56245262, rs56083757 and rs7669329), that have previously shown association with KD in cohorts of European descent. Using transcriptome data from pre-treatment whole blood of KD subjects (n = 146), expression quantitative trait loci (eQTL) analyses were performed. Subjects homozygous for the intronic risk allele (A allele of TLR6 rs56245262) had differential expression of Interleukin-6 (IL-6) as a function of genotype (p = 0.0007) and a higher erythrocyte sedimentation rate at diagnosis. TLR6 plays an important role in pathogen-associated molecular pattern recognition, and sequence variations may affect binding affinities that in turn influence KD susceptibility. This integrative genomic approach illustrates how the analysis of WGS in multiplex families with a complex genetic disease allows examination of both the common disease–common variant and common disease–rare variant hypotheses.
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Affiliation(s)
- Jihoon Kim
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
- * E-mail: (JK); (JCB)
| | - Chisato Shimizu
- Department of Pediatrics, University of California San Diego, La Jolla, California, United States of America
| | - Stephen F. Kingsmore
- Rady Children’s Institute for Genomic Medicine, Rady Children’s Hospital, San Diego, California, United States of America
| | - Narayanan Veeraraghavan
- Rady Children’s Institute for Genomic Medicine, Rady Children’s Hospital, San Diego, California, United States of America
| | - Eric Levy
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
- Bioinformatics and Systems Biology Graduate Program, University of California San Diego, La Jolla, California, United States of America
| | - Andre M. Ribeiro dos Santos
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
| | - Hai Yang
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
| | - Jay Flatley
- Illumina, San Diego, California, United States of America
| | | | - Martin L. Hibberd
- Depatment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Adriana H. Tremoulet
- Department of Pediatrics, University of California San Diego, La Jolla, California, United States of America
- Rady Children’s Hospital San Diego, San Diego, California, United States of America
| | - Olivier Harismendy
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
- Moores Cancer Center, University of California San Diego, La Jolla, California, United States of America
| | - Lucila Ohno-Machado
- Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States of America
| | - Jane C. Burns
- Department of Pediatrics, University of California San Diego, La Jolla, California, United States of America
- Rady Children’s Hospital San Diego, San Diego, California, United States of America
- * E-mail: (JK); (JCB)
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