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Packialakshmi B, Limerick E, Ackerman HC, Lin X, Nekhai S, Oliver JD, Stewart IJ, Knepper MA, Fitzhugh C, Zhou X. Proteomic analyses of urinary exosomes identify novel potential biomarkers for early diagnosis of sickle cell nephropathy, a sex-based study. Front Physiol 2024; 15:1300667. [PMID: 38426210 PMCID: PMC10901968 DOI: 10.3389/fphys.2024.1300667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 01/26/2024] [Indexed: 03/02/2024] Open
Abstract
Sickle cell nephropathy (SCN) is a leading cause of morbidity and mortality in sickle cell disease (SCD). Early intervention is crucial for mitigating its effects. However, current diagnostic methods rely on generic tests and may not detect SCN until irreversible renal damage occurs. Therefore, specific biomarkers for early diagnosis of SCN are needed. Urinary exosomes, membrane-bound vesicles secreted by renal podocytes and epithelial cells, contain both common and cell type-specific membrane and cytosolic proteins, reflecting the physiologic and pathophysiologic states of the kidney. Using proteomics, we analyzed the proteomes of urinary exosomes from humanized SCD mice at 2 months (without albuminuria) and 4 months (with albuminuria) of age. Excretion of 164 proteins were significantly increased and 176 proteins was significantly decreased in the exosomes when mice developed albuminuria. Based on the relevance to SCD, chronic kidney disease and Western blot confirmation in mice, we analyzed protein abundance of heparanase, cathepsin C, α2-macroglobulin and sarcoplasmic endoplasmic Ca2+ ATPase-3 (SERCA3) in the urinary exosomes and urine of 18 SCD subjects without albuminuria and 12 subjects with albuminuria using Western blot analyses. Both male and female subjects increased or tended to increase the excretion of these proteins in their urinary exosomes upon developing albuminuria, but female subjects demonstrated stronger correlations between the excretion of these proteins and urine albumin creatinine ratio (UACR) compared to male subjects. In contrast, exosomal excretion of Tamm-Horsfall protein, β-actin and SHP-1 was independent of albuminuria. These findings provide a foundation for a time-course study to determine whether increases in the levels of these proteins precede the onset of albuminuria in patients, which will help determine the potential of these proteins as biomarkers for early detection of SCN.
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Affiliation(s)
- Balamurugan Packialakshmi
- Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD, United States
| | - Emily Limerick
- Cellular and Molecular Therapeutic Branch, National Heart Lung and Blood Institute, Bethesda, MD, United States
| | - Hans C. Ackerman
- Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, MD, United States
| | - Xionghao Lin
- Department of Medicine, Howard University, Washington, DC, United States
| | - Sergei Nekhai
- Department of Medicine, Howard University, Washington, DC, United States
| | - James D. Oliver
- Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD, United States
- Nephrology Service, Walter Reed National Military Medical Center, Bethesda, MD, United States
| | - Ian J. Stewart
- Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD, United States
| | - Mark A. Knepper
- System Biology Center, National Heart Lung and Blood Institute, Bethesda, MD, United States
| | - Courtney Fitzhugh
- Cellular and Molecular Therapeutic Branch, National Heart Lung and Blood Institute, Bethesda, MD, United States
| | - Xiaoming Zhou
- Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD, United States
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Huang J, Zhao A, He D, Wu X, Yan H, Zhu L. Isolation and Proteomic Analysis of Extracellular Vesicles from Lactobacillus salivarius SNK-6. J Microbiol Biotechnol 2024; 34:224-231. [PMID: 38282412 PMCID: PMC10840465 DOI: 10.4014/jmb.2308.08017] [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: 08/11/2023] [Revised: 10/10/2023] [Accepted: 10/30/2023] [Indexed: 01/30/2024]
Abstract
The proteins carried by the extracellular vesicles of Lactobacillus salivarius SNK-6 (LsEVs) were identified to provide a foundation for further explorations of the probiotic activities of L. salivarius SNK-6. LsEVs were isolated from the culture media of L. salivarius SNK-6 and morphological analysis was conducted by scanning electron microscopy. Subsequent transmission electron microscopy and nanoparticle tracking analysis were performed to assess the morphology and particle size of the LsEVs. In addition, the protein composition of LsEVs was analyzed using silver staining and protein mass spectrometry. Finally, internalization of the identified LsEVs was confirmed using a confocal microscope, and enzyme-linked immunosorbent assay was employed to analyze the levels of inflammatory cytokines in LPS-challenged RAW264.7 cells. The results revealed that the membrane-enclosed LsEVs were spherical, with diameters ranging from 100-250 nm. The LsEVs with diameters of 111-256 nm contained the greatest amount of cargo. In total, 320 proteins (10-38 kD) were identified in the LsEVs and included anti-inflammatory molecules, such as PrtP proteinase, co-chaperones, and elongation factor Tu, as well as some proteins involved in glycolysis/gluconeogenesis, such as fructose-1,6-bisphosphate aldolase. Enrichment analysis showed these proteins to be related to the terms "metabolic pathway," "ribosome," "glycolysis/gluconeogenesis," "carbohydrate metabolism," and "amino acid metabolism." Furthermore, the LsEVs were internalized by host liver cells and can regulate inflammation. These findings confirm that LsEVs contain various functional proteins that play important roles in energy metabolism, signal transduction, and biosynthesis.
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Affiliation(s)
- Jiwen Huang
- College of Animal Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou 311300, P.R. China
- Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201106, P.R. China
| | - Ayong Zhao
- College of Animal Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou 311300, P.R. China
| | - Daqian He
- Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201106, P.R. China
| | - Xiao Wu
- Key Laboratory of Agricultural Genetics and Breeding, Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, P.R. China
| | - Huaxiang Yan
- Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201106, P.R. China
| | - Lihui Zhu
- Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201106, P.R. China
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Xiong Y, Lou P, Xu C, Han B, Liu J, Gao J. Emerging role of extracellular vesicles in veterinary practice: novel opportunities and potential challenges. Front Vet Sci 2024; 11:1335107. [PMID: 38332755 PMCID: PMC10850357 DOI: 10.3389/fvets.2024.1335107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 01/12/2024] [Indexed: 02/10/2024] Open
Abstract
Extracellular vesicles are nanoscale vesicles that transport signals between cells, mediating both physiological and pathological processes. EVs facilitate conserved intercellular communication. By transferring bioactive molecules between cells, EVs coordinate systemic responses, regulating homeostasis, immunity, and disease progression. Given their biological importance and involvement in pathogenesis, EVs show promise as biomarkers for veterinary diagnosis, and candidates for vaccine production, and treatment agents. Additionally, different treatment or engineering methods could be used to boost the capability of extracellular vesicles. Despite the emerging veterinary interest, EV research has been predominantly human-based. Critical knowledge gaps remain regarding isolation protocols, cargo loading mechanisms, in vivo biodistribution, and species-specific functions. Standardized methods for veterinary EV characterization and validation are lacking. Regulatory uncertainties impede veterinary clinical translation. Advances in fundamental EV biology and technology are needed to propel the veterinary field forward. This review introduces EVs from a veterinary perspective by introducing the latest studies, highlighting their potential while analyzing challenges to motivate expanded veterinary investigation and translation.
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Affiliation(s)
- Yindi Xiong
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Peng Lou
- NHC Key Laboratory of Transplant Engineering and Immunology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Chuang Xu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Bo Han
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jingping Liu
- NHC Key Laboratory of Transplant Engineering and Immunology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Jian Gao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Li T, Ci Liu T, Liu N, Zhang M. Changes in urinary exosomal protein CALM1 may serve as an early noninvasive biomarker for diagnosing diabetic kidney disease. Clin Chim Acta 2023; 547:117466. [PMID: 37406751 DOI: 10.1016/j.cca.2023.117466] [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: 04/19/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND The risk of the development and progression of diabetic kidney disease (DKD) was increased by abnormal calcium release. However, it is still unknown whether calcium signal pathway-related proteins are changed in urinary exosomes. This study aims to explore the changes in urinary exosomal proteins, which may provide novel biomarkers for diagnosing DKD. METHODS Urinary exosomes were isolated from 132 participants by size exclusion chromatography method and 72 participants were tested by LC-MS/MS (Discovery phase). Correlation and multivariate logistics analysis were applied to evaluate selected urinary proteins. Western blot and ELISA were used to validate the selected protein (Validation phase: n = 60). The diagnostic performance of the selected biomarker was evaluated by receiver operating characteristic curve analyses between the discovery and validation phases. RESULTS Sixteen calcium signal pathway-related proteins were identified, however, only Calmodulin-1(CALM1) was continuously increased. Different expression of CALM1 was found in patients with different level of estimated glomerular filtration rate (eGFR) in two cohorts. The level of CALM1 was correlated with eGFR and serum creatinine levels in two cohorts. Multivariate analysis revealed that serum albumin (ALB) levels and CALM1 were independent risk factors for DKD. A diagnostic model based on CALM1 and serum ALB levels that could significantly distinguish DKD was established and validated. CONCLUSIONS Significant changes in calcium signal pathway-related urinary exosomal proteins were observed. The CALM1 may serve as an early noninvasive biomarker for diagnosing DKD.
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Affiliation(s)
- Tao Li
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China; Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing 100038, China
| | - Tian Ci Liu
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China; Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing 100038, China
| | - Na Liu
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China; Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing 100038, China
| | - Man Zhang
- Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China; Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing 100038, China; Institute of Regenerative Medicine and Laboratory Technology Innovation, Qingdao University, Qingdao 266071, China.
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