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Gu M, Jiang H, Tan M, Yu L, Xu N, Li Y, Wu H, Hou Q, Dai C. Palmitoyltransferase DHHC9 and acyl protein thioesterase APT1 modulate renal fibrosis through regulating β-catenin palmitoylation. Nat Commun 2023; 14:6682. [PMID: 37865665 PMCID: PMC10590414 DOI: 10.1038/s41467-023-42476-z] [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: 02/08/2023] [Accepted: 10/12/2023] [Indexed: 10/23/2023] Open
Abstract
palmitoylation, a reversible post-translational modification, is initiated by the DHHC family of palmitoyltransferases and reversed by several acyl protein thioesterases. However, the role and mechanisms for protein palmitoylation in renal fibrosis have not been elucidated. Here we show protein palmitoylation and DHHC9 were downregulated in the fibrotic kidneys of mouse models and chronic kidney disease (CKD) patients. Ablating DHHC9 in tubular cells aggravated, while inducing DHHC9 overexpression with adeno-DHHC9 transfection or iproniazid treatment protected against kidney fibrosis in male mouse models. Mechanistically, DHHC9 palmitoylated β-catenin, thereby promoted its ubiquitination and degradation. Additionally, acyl protein thioesterase 1 (APT1) was induced in the fibrotic kidneys, which depalmitoylated β-catenin, increased its abundance and nuclear translocation. Ablating tubular APT1 or inhibiting APT1 with ML348 markedly protected against unilateral ureter obstruction (UUO) or ischemia/reperfusion injury (IRI)-induced kidney fibrosis in male mice. This study reveals the regulatory mechanism of protein palmitoylation in kidney fibrosis.
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Affiliation(s)
- Mengru Gu
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
- Department of Clinical Genetics, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Hanlu Jiang
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Mengzhu Tan
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Long Yu
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Ning Xu
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Ying Li
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Han Wu
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Qing Hou
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China
| | - Chunsun Dai
- Center for Kidney Diseases, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China.
- Department of Clinical Genetics, the Second Affiliated Hospital of Nanjing Medical University; Nanjing, China, 210009, 262 North Zhongshan Road, Nanjing, Jiangsu, China.
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Laget J, Duranton F, Argilés À, Gayrard N. Renal insufficiency and chronic kidney disease – Promotor or consequence of pathological post-translational modifications. Mol Aspects Med 2022; 86:101082. [DOI: 10.1016/j.mam.2022.101082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/27/2022] [Accepted: 02/03/2022] [Indexed: 12/12/2022]
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Yang X, Zheng E, Ma Y, Chatterjee V, Villalba N, Breslin JW, Liu R, Wu MH, Yuan SY. DHHC21 deficiency attenuates renal dysfunction during septic injury. Sci Rep 2021; 11:11146. [PMID: 34045489 PMCID: PMC8159935 DOI: 10.1038/s41598-021-89983-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 03/15/2021] [Indexed: 12/16/2022] Open
Abstract
Renal dysfunction is one of the most common complications of septic injury. One critical contributor to septic injury-induced renal dysfunction is renal vascular dysfunction. Protein palmitoylation serves as a novel regulator of vascular function. Here, we examined whether palmitoyl acyltransferase (PAT)-DHHC21 contributes to septic injury-induced renal dysfunction through regulating renal hemodynamics. Multispectral optoacoustic imaging showed that cecal ligation and puncture (CLP)-induced septic injury caused impaired renal excretion, which was improved in DHHC21 functional deficient (Zdhhc21dep/dep) mice. DHHC21 deficiency attenuated CLP-induced renal pathology, characterized by tissue structural damage and circulating injury markers. Importantly, DHHC21 loss-of-function led to better-preserved renal perfusion and oxygen saturation after CLP. The CLP-caused reduction in renal blood flow was also ameliorated in Zdhhc21dep/dep mice. Next, CLP promoted the palmitoylation of vascular α1-adrenergic receptor (α1AR) and the activation of its downstream effector ERK, which were blunted in Zdhhc21dep/dep mice. Vasoreactivity analysis revealed that renal arteries from Zdhhc21dep/dep mice displayed reduced constriction response to α1AR agonist phenylephrine compared to those from wild-type mice. Consistently, inhibiting PATs with 2-bromopalmitate caused a blunted vasoconstriction response to phenylephrine in small arteries isolated from human kidneys. Therefore, DHHC21 contributes to impaired renal perfusion and function during septic injury via promoting α1AR palmitoylation-associated vasoconstriction.
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Affiliation(s)
- Xiaoyuan Yang
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Ethan Zheng
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Yonggang Ma
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Victor Chatterjee
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Nuria Villalba
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Jerome W Breslin
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Ruisheng Liu
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Mack H Wu
- Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA
| | - Sarah Y Yuan
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA. .,Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, 33612, USA.
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Tripathi P, Zhu Z, Qin H, Elsherbini A, Crivelli SM, Roush E, Wang G, Spassieva SD, Bieberich E. Palmitoylation of acetylated tubulin and association with ceramide-rich platforms is critical for ciliogenesis. J Lipid Res 2021; 62:100021. [PMID: 33380429 PMCID: PMC7903138 DOI: 10.1194/jlr.ra120001190] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/19/2020] [Accepted: 12/30/2020] [Indexed: 11/21/2022] Open
Abstract
Microtubules are polymers composed of αβ-tubulin subunits that provide structure to cells and play a crucial role in in the development and function of neuronal processes and cilia, microtubule-driven extensions of the plasma membrane that have sensory (primary cilia) or motor (motile cilia) functions. To stabilize microtubules in neuronal processes and cilia, α tubulin is modified by the posttranslational addition of an acetyl group, or acetylation. We discovered that acetylated tubulin in microtubules interacts with the membrane sphingolipid, ceramide. However, the molecular mechanism and function of this interaction are not understood. Here, we show that in human induced pluripotent stem cell–derived neurons, ceramide stabilizes microtubules, which indicates a similar function in cilia. Using proximity ligation assays, we detected complex formation of ceramide with acetylated tubulin in Chlamydomonas reinhardtii flagella and cilia of human embryonic kidney (HEK293T) cells, primary cultured mouse astrocytes, and ependymal cells. Using incorporation of palmitic azide and click chemistry–mediated addition of fluorophores, we show that a portion of acetylated tubulin is S-palmitoylated. S-palmitoylated acetylated tubulin is colocalized with ceramide-rich platforms in the ciliary membrane, and it is coimmunoprecipitated with Arl13b, a GTPase that mediates transport of proteins into cilia. Inhibition of S-palmitoylation with 2-bromo palmitic acid or inhibition of ceramide biosynthesis with fumonisin B1 reduces formation of the Arl13b-acetylated tubulin complex and its transport into cilia, concurrent with impairment of ciliogenesis. Together, these data show, for the first time, that ceramide-rich platforms mediate membrane anchoring and interaction of S-palmitoylated proteins that are critical for cilium formation, stabilization, and function.
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Affiliation(s)
- Priyanka Tripathi
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Zhihui Zhu
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Haiyan Qin
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Ahmed Elsherbini
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Simone M Crivelli
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA; Veterans Affairs Medical Center, Lexington, KY, USA
| | - Emily Roush
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Guanghu Wang
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Stefka D Spassieva
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Erhard Bieberich
- Department of Physiology, University of Kentucky College of Medicine, Lexington, KY, USA; Veterans Affairs Medical Center, Lexington, KY, USA.
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Streets A, Ong A. Post-translational modifications of the polycystin proteins. Cell Signal 2020; 72:109644. [PMID: 32320857 DOI: 10.1016/j.cellsig.2020.109644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 12/12/2022]
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most common inherited cause of kidney failure and affects up to 12 million people worldwide. Germline mutations in two genes, PKD1 or PKD2, account for almost all patients with ADPKD. The ADPKD proteins, polycystin-1 (PC1) and polycystin-2 (PC2), are regulated by post-translational modifications (PTM), with phosphorylation, glycosylation and proteolytic cleavage being the best described changes. A few PTMs have been shown to regulate polycystin trafficking, signalling, localisation or stability and thus their physiological function. A key challenge for the future will be to elucidate the functional significance of all the individual PTMs reported to date. Finally, it is possible that site-specific mutations that disrupt PTM could contribute to cystogenesis although in the majority of cases, confirmatory evidence is awaited.
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Affiliation(s)
- Andrew Streets
- Kidney Genetics Group, Academic Nephrology Unit, University of Sheffield Medical School, Sheffield, UK.
| | - Albert Ong
- Kidney Genetics Group, Academic Nephrology Unit, University of Sheffield Medical School, Sheffield, UK
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Roy K, Marin EP. Lipid Modifications in Cilia Biology. J Clin Med 2019; 8:jcm8070921. [PMID: 31252577 PMCID: PMC6678300 DOI: 10.3390/jcm8070921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/22/2019] [Accepted: 06/24/2019] [Indexed: 12/17/2022] Open
Abstract
Cilia are specialized cellular structures with distinctive roles in various signaling cascades. Ciliary proteins need to be trafficked to the cilium to function properly; however, it is not completely understood how these proteins are delivered to their final localization. In this review, we will focus on how different lipid modifications are important in ciliary protein trafficking and, consequently, regulation of signaling pathways. Lipid modifications can play a variety of roles, including tethering proteins to the membrane, aiding trafficking through facilitating interactions with transporter proteins, and regulating protein stability and abundance. Future studies focusing on the role of lipid modifications of ciliary proteins will help our understanding of how cilia maintain specific protein pools strictly connected to their functions.
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Affiliation(s)
- Kasturi Roy
- Department of Internal Medicine, Section of Nephrology, Yale School of Medicine, PO Box 208029, New Haven, CT 06520-8029, USA.
| | - Ethan P Marin
- Department of Internal Medicine, Section of Nephrology, Yale School of Medicine, PO Box 208029, New Haven, CT 06520-8029, USA
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