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DiStefano JK, Piras IS, Wu X, Sharma R, Garcia-Mansfield K, Willey M, Lovell B, Pirrotte P, Olson ML, Shaibi GQ. Changes in proteomic cargo of circulating extracellular vesicles in response to lifestyle intervention in adolescents with hepatic steatosis. Clin Nutr ESPEN 2024; 60:333-342. [PMID: 38479932 PMCID: PMC10937812 DOI: 10.1016/j.clnesp.2024.02.024] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Recent studies suggest that proteomic cargo of extracellular vesicles (EVs) may play a role in metabolic improvements following lifestyle interventions. However, the relationship between changes in liver fat and circulating EV-derived protein cargo following intervention remains unexplored. METHODS The study cohort comprised 18 Latino adolescents with obesity and hepatic steatosis (12 males/6 females; average age 13.3 ± 1.2 y) who underwent a six-month lifestyle intervention. EV size distribution and concentration were determined by light scattering intensity; EV protein composition was characterized by liquid chromatography tandem-mass spectrometry. RESULTS Average hepatic fat fraction (HFF) decreased 23% by the end of the intervention (12.5% [5.5] to 9.6% [4.9]; P = 0.0077). Mean EV size was smaller post-intervention compared to baseline (120.2 ± 16.4 nm to 128.4 ± 16.5 nm; P = 0.031), although the difference in mean EV concentration (1.1E+09 ± 4.1E+08 particles/mL to 1.1E+09 ± 1.8E+08 particles/mL; P = 0.656)) remained unchanged. A total of 462 proteins were identified by proteomic analysis of plasma-derived EVs from participants pre- and post-intervention, with 113 proteins showing differential abundance (56 higher and 57 lower) between the two timepoints (adj-p <0.05). Pathway analysis revealed enrichment in complement cascade, initial triggering of complement, creation of C4 and C2 activators, and regulation of complement cascade. Hepatocyte-specific EV affinity purification identified 40 proteins with suggestive (p < 0.05) differential abundance between pre- and post-intervention samples. CONCLUSIONS Circulating EV-derived proteins, particularly those associated with the complement cascade, may contribute to improvements in liver fat in response to lifestyle intervention.
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Affiliation(s)
- Johanna K DiStefano
- Diabetes and Metabolic Disease Research Unit, Translational Genomics Research Institute, Phoenix, AZ, USA.
| | - Ignazio S Piras
- Neurogenomics Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Xiumei Wu
- Diabetes and Metabolic Disease Research Unit, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Ritin Sharma
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Krystine Garcia-Mansfield
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Maya Willey
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Brooke Lovell
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Patrick Pirrotte
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Micah L Olson
- Division of Endocrinology and Diabetes, Phoenix Children's, Phoenix, AZ, USA; Center for Health Promotion and Disease Prevention, Edson College of Nursing, Arizona State University, Phoenix, AZ, USA
| | - Gabriel Q Shaibi
- Division of Endocrinology and Diabetes, Phoenix Children's, Phoenix, AZ, USA; Center for Health Promotion and Disease Prevention, Edson College of Nursing, Arizona State University, Phoenix, AZ, USA
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