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Wang Y, Zhao A, Zhou N, Wang X, Pan C, Zhou S, Huang H, Yang Y, Yang J, Yang Y, Zhang J, Chen F, Cao Q, Zhao J, Zhang S, Li M, Li M. OSBPL2 compound heterozygous variants cause dyschromatosis, ichthyosis, deafness and atopic disease syndrome. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167207. [PMID: 38701954 DOI: 10.1016/j.bbadis.2024.167207] [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: 11/28/2023] [Revised: 04/26/2024] [Accepted: 04/28/2024] [Indexed: 05/06/2024]
Abstract
PURPOSE In this study, we identified and diagnosed a novel inherited condition called Dyschromatosis, Ichthyosis, Deafness, and Atopic Disease (DIDA) syndrome. We present a series of studies to clarify the pathogenic variants and specific mechanism. METHODS Exome sequencing and Sanger sequencing was conducted in affected and unaffected family members. A variety of human and cell studies were performed to explore the pathogenic process of keratosis. RESULTS Our finding indicated that DIDA syndrome was caused by compound heterozygous variants in the oxysterol-binding protein-related protein 2 (OSBPL2) gene. Furthermore, our findings revealed a direct interaction between OSBPL2 and Phosphoinositide phospholipase C-beta-3 (PLCB3), a key player in hyperkeratosis. OSBPL2 effectively inhibits the ubiquitylation of PLCB3, thereby stabilizing PLCB3. Conversely, OSBPL2 variants lead to enhanced ubiquitination and subsequent degradation of PLCB3, leading to epidermal hyperkeratosis, characterized by aberrant proliferation and delayed terminal differentiation of keratinocytes. CONCLUSIONS Our study not only unveiled the association between OSBPL2 variants and the newly identified DIDA syndrome but also shed light on the underlying mechanism.
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Affiliation(s)
- Yumeng Wang
- Dermatology Center, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 200092 Shanghai, China
| | - Anqi Zhao
- Department of Dermatology, Children's Hospital of Fudan University, 201102 Shanghai, China
| | - Naihui Zhou
- Department of Dermatology, The First Affiliated Hospital of Soochow University, 188 Shizi Road, Suzhou, 215006 Suzhou, China
| | - Xiaoxiao Wang
- Dermatology Center, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 200092 Shanghai, China
| | - Chaolan Pan
- Dermatology Center, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 200092 Shanghai, China
| | - Shengru Zhou
- Department of Dermatology, The Fourth Affiliated Hospital of Soochow University (Suzhou Dushu Lake Hospital; Medical Center of Soochow University), 215125 Suzhou, China
| | - Haisheng Huang
- Anhui University of Science and Technology School of Medicine, 232001, Anhui, China
| | - Yijun Yang
- Dermatology Center, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 200092 Shanghai, China
| | - Jianqiu Yang
- Department of Dermatology, The Fourth Affiliated Hospital of Soochow University (Suzhou Dushu Lake Hospital; Medical Center of Soochow University), 215125 Suzhou, China
| | - Yifan Yang
- Department of Dermatology, The Fourth Affiliated Hospital of Soochow University (Suzhou Dushu Lake Hospital; Medical Center of Soochow University), 215125 Suzhou, China
| | - Jingwen Zhang
- Department of Dermatology, The Fourth Affiliated Hospital of Soochow University (Suzhou Dushu Lake Hospital; Medical Center of Soochow University), 215125 Suzhou, China
| | - Fuying Chen
- Department of Dermatology, Children's Hospital of Fudan University, 201102 Shanghai, China
| | - Qiaoyu Cao
- Department of Dermatology, Children's Hospital of Fudan University, 201102 Shanghai, China
| | - Jingjun Zhao
- Dermatology Center, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, 200092 Shanghai, China
| | - Si Zhang
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 200032 Shanghai, China.
| | - Ming Li
- Department of Dermatology, Children's Hospital of Fudan University, 201102 Shanghai, China.
| | - Min Li
- Department of Dermatology, The Fourth Affiliated Hospital of Soochow University (Suzhou Dushu Lake Hospital; Medical Center of Soochow University), 215125 Suzhou, China.
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Liaqat K, Treat K, Mantcheva L, Nasir A, Weaver DD, Conboy E, Vetrini F. A case of MBTPS1-related disorder due to compound heterozygous variants in MBTPS1 gene: Genotype-phenotype expansion and the emergence of a novel syndrome. Am J Med Genet A 2024; 194:e63499. [PMID: 38135440 DOI: 10.1002/ajmg.a.63499] [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: 10/18/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023]
Abstract
MBTPS1 (NM_003791.4) encodes Site-1 protease, a serine protease that functions sequentially with Site-2 protease regulating cholesterol homeostasis and endoplasmic reticulum stress response. MBTPS1 pathogenic variants are associated with spondyloepiphyseal dysplasia, Kondo-Fu type (MIM:618392; cataract, alopecia, oral mucosal disorder, and psoriasis-like syndrome, and Silver-Russell-like syndrome). In this report, we describe a 14-year-old female with a complex medical history including white matter volume loss, early-onset cataracts, retrognathia, laryngomalacia, inguinal hernia, joint hypermobility, feeding dysfunction, and speech delay. Additionally, features of ectodermal dysplasia that she has include decreased sweating, heat intolerance, dysplastic nails, chronically dry skin, and abnormal hair growth issues. Exome sequencing analysis identified compound heterozygous variants in the MBTPS1 gene: c.2255G > T p.(Gly752Val) predicted to affect important function of the protein, which was inherited from the mother, and a splice site variant c.2831 + 5G > T, which was inherited from the father. The RNA-seq analysis of the splice variant showed skipping of exon 21, predicted to result in frameshifting p.(Ser901fs28*) leading to non-sense mediated decay. To our knowledge, only eight studies have been published that described the MBPTS1-related disorders. Interestingly, we observed the features of ectodermal dysplasia in our patient that further expands the phenotypic spectrum of MBTPS1 gene-related disorders.
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Affiliation(s)
- Khurram Liaqat
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Kayla Treat
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Lili Mantcheva
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Abdul Nasir
- Department of Anesthesiology, Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - David D Weaver
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Erin Conboy
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Francesco Vetrini
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
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Pan C, Wang C, Zhao Y, Bo T, Han L, Yao D, Wang Y, Wang X, Shi L, Zhao A, Cao Q, Chen F, He W, Ye Y, Zhang S, Li M. Superior COL7A1 and TGM1 gene expression in difficult-to-transfect skin cell mediated by highly branched poly(β-amino esters) through stepwise fractionation. J Control Release 2024; 370:82-94. [PMID: 38643938 DOI: 10.1016/j.jconrel.2024.04.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/24/2024] [Accepted: 04/18/2024] [Indexed: 04/23/2024]
Abstract
Delivering functional gene into targeted skin cells or tissues to modulate the genes expression, has the potential to treat various hereditary cutaneous disorders. Nevertheless, the lack of safe and effective gene delivery vehicles greatly limits the clinical translation of gene therapy for inherited skin diseases. Herein, we developed a facile elution fractionation strategy to isolate eight HPAEs with Mw ranging from 7.6 to 131.8 kg/mol and Đ < 2.0 from the one crude HPAE23.7k, and investigated the expression efficiency for TGM1 and COL7A1 plasmids. Gene transfection results revealed that the intermediate MW HPAEs, HPAE20.6k, exhibited the highest gene transfection efficiency (46.4%) and the strongest mean fluorescence intensity (143,032 RLU), compared to other isolated components and the crude product. Importantly, best-performing isolated HPAE effectively delivered COL7A1 (15,974 bp) and TGM1 (7181 bp) plasmids, promoting the efficient expression of type VII collagen (C7) and transglutaminase-1 proteins in cutaneous cells. Our study establishes a straightforward step-by-step elution fractionation strategy for the development of HPAEs gene delivery vectors, expediting their clinical translation in inherited skin diseases.
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Affiliation(s)
- Chaolan Pan
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Chenfei Wang
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China.
| | - Yitong Zhao
- School of Medicine, Anhui University of Science and Technology, Huainan, Anhui 232000, China
| | - Tao Bo
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Liping Han
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China; Department of Blood Transfusion, Huashan Hospital, Fudan University, Shanghai, China
| | - Dingjin Yao
- Shanghai EditorGene Technology Co., Ltd, Shanghai, 200000, China
| | - Yumeng Wang
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Xiaoxiao Wang
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Linjing Shi
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Anqi Zhao
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Qiaoyu Cao
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Fuying Chen
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Wei He
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Ying Ye
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Si Zhang
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.
| | - Ming Li
- Department of Dermatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China.
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Li ZL, Huang MM, Yu MY, Nie DF, Fu SL, Di JJ, Lan T, Liu BC, Wu QL. Mitochondrial fumarate promotes ischemia/reperfusion-induced tubular injury. Acta Physiol (Oxf) 2024; 240:e14121. [PMID: 38409944 DOI: 10.1111/apha.14121] [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: 10/23/2023] [Revised: 01/20/2024] [Accepted: 01/23/2024] [Indexed: 02/28/2024]
Abstract
AIM Mitochondrial dysfunction, a characteristic pathological feature of renal Ischemic/reperfusion injury (I/RI), predisposes tubular epithelial cells to maintain an inflammatory microenvironment, however, the exact mechanisms through which mitochondrial dysfunction modulates the induction of tubular injury remains incompletely understood. METHODS ESI-QTRAP-MS/MS approach was used to characterize the targeted metabolic profiling of kidney with I/RI. Tubule injury, mitochondrial dysfunction, and fumarate level were evaluated using qPCR, transmission electron microscopy, ELISA, and immunohistochemistry. RESULTS We demonstrated that tubule injury occurred at the phase of reperfusion in murine model of I/RI. Meanwhile, enhanced glycolysis and mitochondrial dysfunction were found to be associated with tubule injury. Further, we found that tubular fumarate, which resulted from fumarate hydratase deficiency and released from dysfunctional mitochondria, promoted tubular injury. Mechanistically, fumarate induced tubular injury by causing disturbance of glutathione (GSH) hemostasis. Suppression of GSH with buthionine sulphoximine administration could deteriorate the fumarate inhibition-mediated tubule injury recovery. Reactive oxygen species/NF-κB signaling activation played a vital role in fumarate-mediated tubule injury. CONCLUSION Our studies demonstrated that the mitochondrial-derived fumarate promotes tubular epithelial cell injury in renal I/RI. Blockade of fumarate-mediated ROS/NF-κB signaling activation may serve as a novel therapeutic approach to ameliorate hypoxic tubule injury.
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Affiliation(s)
- Zuo-Lin Li
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Ming-Min Huang
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Meng-Yao Yu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Di-Fei Nie
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Sha-Li Fu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Jing-Jing Di
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Ting Lan
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Bi-Cheng Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Qiu-Li Wu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
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Yuan W, Li X, Wang G, Qu B, Zhao F. Association of autoimmune and allergic diseases with senile cataract: a bidirectional two-sample Mendelian randomization study. Front Immunol 2024; 15:1325868. [PMID: 38585265 PMCID: PMC10995295 DOI: 10.3389/fimmu.2024.1325868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 02/19/2024] [Indexed: 04/09/2024] Open
Abstract
Background Many observational studies have been reported that patients with autoimmune or allergic diseases seem to have a higher risk of developing senile cataract, but the views are not consistent. In order to minimize the influence of reverse causality and potential confounding factors, we performed Mendelian Randomization (MR) analysis to investigate the genetic causal associations between autoimmune, allergic diseases and senile cataract. Methods Single nucleotide polymorphisms associated with ten common autoimmune and allergic diseases were obtained from the IEU Open genome-wide association studies (GWAS) database. Summary-level GWAS statistics for clinically diagnosed senile cataract were obtained from the FinnGen research project GWAS, which consisted of 59,522 individuals with senile cataracts and 312,864 control individuals. MR analysis was conducted using mainly inverse variance weighted (IVW) method and further sensitivity analysis was performed to test robustness. Results As for ten diseases, IVW results confirmed that type 1 diabetes (OR = 1.06; 95% CI = 1.05-1.08; p = 2.24×10-12), rheumatoid arthritis (OR = 1.05; 95% CI = 1.02-1.08; p = 1.83×10-4), hypothyroidism (OR = 2.4; 95% CI = 1.42-4.06; p = 1.12×10-3), systemic lupus erythematosus (OR = 1.02; 95% CI = 1.01-1.03; p = 2.27×10-3), asthma (OR = 1.02; 95% CI = 1.01-1.03; p = 1.2×10-3) and allergic rhinitis (OR = 1.07; 95% CI = 1.02-1.11; p = 2.15×10-3) were correlated with the risk of senile cataract. Celiac disease (OR = 1.04; 95% CI = 1.01-1.08; P = 0.0437) and atopic dermatitis (OR = 1.05; 95% CI = 1.01-1.10; P = 0.0426) exhibited a suggestive connection with senile cataract after Bonferroni correction. These associations are consistent across weighted median and MR Egger methods, with similar causal estimates in direction and magnitude. Sensitivity analysis further proved that these associations were reliable. Conclusions The results of the MR analysis showed that there were causal relationships between type 1 diabetes, rheumatoid arthritis, hypothyroidism, systemic lupus erythematosus, asthma, allergic rhinitis and senile cataract. To clarify the possible role of autoimmune and allergy in the pathophysiology of senile cataract, further studies are needed.
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Affiliation(s)
- Weichen Yuan
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Key Lens Research Laboratory of Liaoning Province, Shenyang, China
| | - Xiangrui Li
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Key Lens Research Laboratory of Liaoning Province, Shenyang, China
| | - Guan Wang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Key Lens Research Laboratory of Liaoning Province, Shenyang, China
| | - Bo Qu
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Key Lens Research Laboratory of Liaoning Province, Shenyang, China
| | - Fangkun Zhao
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Key Lens Research Laboratory of Liaoning Province, Shenyang, China
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Raggio V, Rodríguez S, Feder S, Gueçaimburú R, Spangenberg L. Exome Sequencing Reveals Biallelic Mutations in MBTPS1 Gene in a Girl with a Very Rare Skeletal Dysplasia. Diagnostics (Basel) 2024; 14:313. [PMID: 38337829 PMCID: PMC10855125 DOI: 10.3390/diagnostics14030313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 02/12/2024] Open
Abstract
The Kondo-Fu type of spondyloepiphyseal dysplasia (SEDKF) is a rare skeletal dysplasia caused by homozygous or compound heterozygous mutations in the MBTPS1 gene. The MBTPS1 gene encodes a protein that is involved in the regulation of cholesterol and fatty acid metabolism. Mutations in MBTPS1 can lead to reduced levels of these lipids, which can have a number of effects on development, including skeletal anomalies, growth retardation, and elevated levels of blood lysosomal enzymes. This work reports the case of a 5-year-old girl with SEDKF. The patient had a severely short stature and a number of skeletal anomalies, including kyphosis, pectus carinatum, and reduced bone mineral density. She also had early onset cataracts and inguinal hernias. Genetic testing revealed two novel compound heterozygous variants in the MBTPS1 gene. These variants are predicted to disrupt the function of the MBTPS1 protein, which is consistent with the patient's clinical presentation. This case report adds to the growing body of evidence that mutations in the MBTPS1 gene are causal of SEDKF. We summarized the features of previous reported cases (with age ranges from 4 to 24 years) and identified that 80% had low stature, 70% low weight, 80% had bilateral cataracts and 70% showed Spondyloepiphyseal dysplasia on X-rays. The findings of this study suggest that SEDKF is a clinically heterogeneous disorder that can present with a variety of features. Further studies are needed to better understand the underlying mechanisms of SEDKF and to develop more effective treatments.
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Affiliation(s)
- Víctor Raggio
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Montevideo 11800, Uruguay; (V.R.); (S.R.)
| | - Soledad Rodríguez
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Montevideo 11800, Uruguay; (V.R.); (S.R.)
| | - Sandra Feder
- Laboratorio de Genética Clínica Genodiagnosis, Montevideo 11600, Uruguay;
| | - Rosario Gueçaimburú
- Centro de Referencia Nacional de Defectos Congénitos y Enfermedades Raras (CRENADECER), Av. Agraciada 2989, Montevideo 11800, Uruguay;
- Hospital Británico, Av. Italia 2420, Montevideo 11600, Uruguay
| | - Lucía Spangenberg
- Departamento Básico de Medicina, Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Montevideo 11600, Uruguay
- Bioinformatics Unit, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
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Masuda-Kuroki K, Alimohammadi S, Di Nardo A. The Role of Sphingolipids and Sphingosine-1-phosphate-Sphingosine-1-phosphate-receptor Signaling in Psoriasis. Cells 2023; 12:2352. [PMID: 37830566 PMCID: PMC10571972 DOI: 10.3390/cells12192352] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023] Open
Abstract
Psoriasis is a long-lasting skin condition characterized by redness and thick silver scales on the skin's surface. It involves various skin cells, including keratinocytes, dendritic cells, T lymphocytes, and neutrophils. The treatments for psoriasis range from topical to systemic therapies, but they only alleviate the symptoms and do not provide a fundamental cure. Moreover, systemic treatments have the disadvantage of suppressing the entire body's immune system. Therefore, a new treatment strategy with minimal impact on the immune system is required. Recent studies have shown that sphingolipid metabolites, particularly ceramide and sphingosine-1-phosphate (S1P), play a significant role in psoriasis. Specific S1P-S1P-receptor (S1PR) signaling pathways have been identified as crucial to psoriasis inflammation. Based on these findings, S1PR modulators have been investigated and have been found to improve psoriasis inflammation. This review will discuss the metabolic pathways of sphingolipids, the individual functions of these metabolites, and their potential as a new therapeutic approach to psoriasis.
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Affiliation(s)
| | | | - Anna Di Nardo
- Department of Dermatology, School of Medicine, University of California San Diego, La Jolla, CA 92093, USA; (K.M.-K.); (S.A.)
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Mousa MG, Vuppaladhadiam L, Kelly MO, Pietka T, Ek S, Shen KC, Meyer GA, Finck BN, Brookheart RT. Site-1 protease inhibits mitochondrial respiration by controlling the TGF-β target gene Mss51. Cell Rep 2023; 42:112336. [PMID: 37002920 PMCID: PMC10544680 DOI: 10.1016/j.celrep.2023.112336] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 02/17/2023] [Accepted: 03/20/2023] [Indexed: 04/03/2023] Open
Abstract
The mitochondrial response to changes in cellular energy demand is necessary for cellular adaptation and organ function. Many genes are essential in orchestrating this response, including the transforming growth factor (TGF)-β1 target gene Mss51, an inhibitor of skeletal muscle mitochondrial respiration. Although Mss51 is implicated in the pathophysiology of obesity and musculoskeletal disease, how Mss51 is regulated is not entirely understood. Site-1 protease (S1P) is a key activator of several transcription factors required for cellular adaptation. However, the role of S1P in muscle is unknown. Here, we identify S1P as a negative regulator of muscle mass and mitochondrial respiration. S1P disruption in mouse skeletal muscle reduces Mss51 expression and increases muscle mass and mitochondrial respiration. The effects of S1P deficiency on mitochondrial activity are counteracted by overexpressing Mss51, suggesting that one way S1P inhibits respiration is by regulating Mss51. These discoveries expand our understanding of TGF-β signaling and S1P function.
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Affiliation(s)
- Muhammad G Mousa
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Lahari Vuppaladhadiam
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Meredith O Kelly
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Terri Pietka
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Shelby Ek
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Karen C Shen
- Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Gretchen A Meyer
- Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA; Departments of Orthopaedic Surgery and Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Biomedical Engineering, Washington University, St. Louis, MO 63130, USA
| | - Brian N Finck
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA
| | - Rita T Brookheart
- John T. Milliken Department of Medicine, Division of Geriatrics and Nutritional Sciences, Washington University School of Medicine, St. Louis, MO 61110, USA.
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Proprotein convertases regulate trafficking and maturation of key proteins within the secretory pathway. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 133:1-54. [PMID: 36707198 DOI: 10.1016/bs.apcsb.2022.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Proprotein Convertases (PCs) are serine endoproteases that regulate the homeostasis of protein substrates in the cell. The PCs family counts 9 members-PC1/3, PC2, PC4, PACE4, PC5/6, PC7, Furin, SKI-1/S1P, and PCSK9. The first seven PCs are known as Basic Proprotein Convertases due to their propensity to cleave after polybasic clusters. SKI-1/S1P requires the additional presence of hydrophobic residues for processing, whereas PCSK9 is catalytically dead after autoactivation and exerts its functions using mechanisms alternative to direct cleavage. All PCs traffic through the canonical secretory pathway, reaching different compartments where the various substrates reside. Despite PCs members do not share the same subcellular localization, most of the cellular organelles count one or more Proprotein Convertases, including ER, Golgi stack, endosomes, secretory granules, and plasma membranes. The widespread expression of these enzymes at the systemic level speaks for their importance in the homeostasis of a large number of biological functions. Among others, PCs cleave precursors of hormones and growth factors and activate receptors and transcription factors. Notably, dysregulation of the enzymatic activity of Proprotein Convertases is associated to major human pathologies, such as cardiovascular diseases, cancer, diabetes, infections, inflammation, autoimmunity diseases, and Parkinson. In the current COVID-19 pandemic, Furin has further attracted the attention as a key player for conferring high pathogenicity to SARS-CoV-2. Here, we review the Proprotein Convertases family and their most important substrates along the secretory pathway. Knowledge about the complex functions of PCs is important to identify potential drug strategies targeting this class of enzymes.
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Chen C, Wu J, Liu Y. Case Report: Recombinant human growth hormone therapy in a patient with spondyloepiphyseal dysplasia, Kondo-Fu type. Front Pediatr 2023; 11:1068718. [PMID: 36816387 PMCID: PMC9935931 DOI: 10.3389/fped.2023.1068718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 01/12/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Variants in membrane-bound transcription factor peptidase, site 1 (MBTPS1) gene, can result in clinically rare spondyloepiphyseal dysplasia of Kondo-fu type (OMIM #618392, SEDKF), Silver-Russell syndrome, and CAOP (cataract, alopecia, oral mucosal disorder, and psoriasis-like) syndrome. CASE PRESENTATION A 6-year-old Chinese male child diagnosed with SEDKF underwent 3 years of growth hormone therapy. A genetic examination revealed two new nonsense variants in the MBTPS1 gene on chromosome 16q23-q24 with compound heterozygotes c.1589(exon12)A > G and c.163(exon2)G > A. CONCLUSION The MBTPS1 gene c.1589(exon12)A > G and c.163(exon2)G > A on chromosome 16q23-q24 is associated with SEDKF. Growth hormone therapy can repair growth retardation in patients with spondyloepiphyseal dysplasia, Kondo-Fu type; however, more evidence of such patient cases is required to support this hypothesis.
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Affiliation(s)
- Congli Chen
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China
| | - Jin Wu
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China
| | - Ying Liu
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China
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Yuan Y, Zhou Q, Wang C, Zhou W, Gu W, Zheng B. Clinical and molecular characterization of a patient with MBTPS1 related spondyloepiphyseal dysplasia: Evidence of pathogenicity for a synonymous variant. Front Pediatr 2022; 10:1056141. [PMID: 36714646 PMCID: PMC9874673 DOI: 10.3389/fped.2022.1056141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND A novel autosomal recessive skeletal dysplasia resulting from pathogenic variants in membrane-bound transcription factor peptidase, site 1 (MBTPS1) has been recently delineated. To date, only three patients have been reported. METHODS In this study, we reported the clinical and molecular features of a Chinese boy who was diagnosed with spondyloepiphyseal dysplasia. The effects of variants on mRNA splicing were analyzed through transcript analysis in vivo and minigene splice assay in vitro. RESULTS The proband mainly showed short stature, special facial features, cataract, hernias, and serious sleep apnea syndrome. Growth hormone stimulation tests suggested the boy had growth hormone deficiency. Imaging examinations suggested abnormal thoracolumbar vertebrae and severely decreased bone mineral density. Genetic analysis of MBTPS1 gene revealed two novel heterozygous variants, a nonsense mutation c.2656C > T (p.Q886*, 167) in exon 20 and a synonymous variant c.774C > T (p.A258=) in exon 6. The transcript analysis in vivo exhibited that the synonymous variant c.774C > T caused exon 6 skipping. The minigene splice assay in vitro confirmed the alteration of MBTPS1 mRNA splicing and the exon skipping was partially restored by an antisense oligonucleotide (ASO) treatment. CONCLUSION Notably, we report a Chinese rare case of spondyloepiphyseal dysplasia and validate its pathogenic synonymous variant in the MBTPS1 gene.
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Affiliation(s)
- Yeqing Yuan
- Department of Endocrinology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Qiaoli Zhou
- Department of Endocrinology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Chunli Wang
- Nanjing Key Laboratory of Pediatrics, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Wei Zhou
- Nanjing Key Laboratory of Pediatrics, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Wei Gu
- Department of Endocrinology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Bixia Zheng
- Nanjing Key Laboratory of Pediatrics, Children's Hospital of Nanjing Medical University, Nanjing, China
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