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Updated: May 28, 2026
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Isolation, Characterization, and Proteomic Analysis of Plasma-Derived Extracellular Vesicles for Cardiovascular Biomarker Discovery
Published on: January 31, 2025
Comprehensive High-Depth Proteomic Analysis of Plasma Extracellular Vesicle-Containing Preparations in CDKL5
Tadashi Shiohama1,2, Satoru Takahashi3, Ryo Takeguchi3
1Department of Pediatrics, Graduate School of Medicine, Chiba University, Inohana 1-8-1, Chuo-ku, Chiba-shi 260-0856, Chiba, Japan.
Biomedicines
|May 27, 2026
Summary
Researchers identified altered proteins in blood extracellular vesicles (EVs) of patients with CDKL5 deficiency disorder (CDD). This plasma EV proteome analysis offers potential biomarkers for this rare neurodevelopmental disorder.
Area of Science:
- Neuroscience
- Proteomics
- Biochemistry
Background:
- CDKL5 deficiency disorder (CDD) is a severe X-linked epileptic encephalopathy with limited objective biomarkers.
- Extracellular vesicles (EVs) in blood may harbor CNS-derived disease indicators.
Purpose of the Study:
- To characterize the plasma EV proteome in CDD patients.
- To identify molecular pathways associated with CDD using a hypothesis-generating approach.
Main Methods:
- Plasma samples from CDD patients and controls were analyzed.
- EVs were isolated using immunoprecipitation (CD9, CD63, CD81).
- Proteomic profiling was performed using data-independent mass spectrometry.
Main Results:
- Over 3500 proteins were quantified; 2108 were upregulated and 158 downregulated in CDD.
- Enrichment analysis indicated altered vesicle transport, cytoskeletal organization, and immune pathways.
- Protein expression correlated with CDKL5 Clinical Severity Assessment scores.
Conclusions:
- Plasma EV proteomics revealed significant molecular alterations in CDD.
- This approach may aid in biomarker discovery and understanding CDD mechanisms.
