EV proteomics / cargo analysis

一行要約

EV proteomics / RNA / lipidomics は EV-isolation の下流で EV 内 cargo (protein, mRNA / miRNA / lncRNA / circRNA, lipid, glycan, metabolite) を網羅的に同定 / 定量する手法群。Cancer EV biomarker discovery (血漿 EV protein / miRNA panel での early detection), exosomal PD-L1 と IO 抵抗性, EV organotropism (integrin profile), pre-metastatic niche cargo の機序解析の中核。Single-EV proteomics の発展で EV 亜集団の heterogeneity を解像できるようになり、biomarker translation が加速。

原理

EV-Proteomics

(1) EV isolation (UC, SEC, immunoaffinity)。(2) lysis + tryptic digest → LC-MS/MS (DDA / DIA / TMT label)。(3) MaxQuant / FragPipe で identification, Perseus で quant analysis。(4) Single-EV proteomics: ExoView / SP-IRIS / NanoFCM で single-EV co-localization, SiMoA (single-molecule array) で ultra-sensitive detection。Vesiclepedia / ExoCarta database で reference annotation。

EV-RNA / miRNA

(1) RNA 抽出 (column / TRIzol)。(2) small-RNA-seq (約17-40 nt) で miRNA / piRNA / tRNA fragment 検出。(3) total RNA-seq (rRNA depleted) で mRNA / lncRNA / circRNA。(4) NanoString nCounter で targeted miRNA profile (clinical-friendly)。

EV-Lipidomics

(1) MTBE 脂質抽出。(2) LC-MS で species 同定 (PC, PE, PS, sphingomyelin, ceramide)。(3) LipidSearch / LIPIDMAPS で annotation。

主要エビデンス / 適用領域

• Cancer EV biomarker: 血漿 EV miRNA panel (NSCLC / SCLC / pancreatic) で early detection
• Exosomal PD-L1: tumor-derived EV 上の PD-L1 が systemic IO 抵抗性に寄与 (Chen et al. Nature 2018, Poggio et al. Cell 2019)
• EV integrin organotropism: αvβ5 → liver, α6β4/α6β1 → lung Hoshino et al. Nature 2015 で organ-specific homing 機序
• Pre-metastatic niche cargo: EV protein / miRNA が distant organ stromal cell を rewire
• Glioma EV: EGFRvIII mRNA を含む EV の血漿検出, glioma 早期診断
• EV-mediated drug resistance: drug efflux pump (P-gp) 含有 EV の drug-tolerant population への伝播

適用分野と限界

• 強み: bulk + single-EV multi-omics, biofluid 由来で minimally invasive biomarker, 治療応答 dynamic monitoring 可能
• 限界: isolation method 依存性で profile 大きく異なる (lipoprotein contamination, soluble protein co-precipitation)、low-abundance protein detection 限界、EV subpopulation (exomere / supermere) の bulk 平均化、reference annotation の incompleteness、quantification standardization 不足

Open Questions

• Single-EV multi-omics: protein × RNA × lipid を 1 EV 単位で同時取得
• In vivo EV cargo selection の機序 (proximity labeling 適用)
• Clinical-grade EV biomarker: pre-analytical / assay variability の harmonization
• Therapeutic EV cargo loading: engineered EV vaccine / drug delivery の cargo programming

関連エンティティ

• 上位 / 補完手法: EV-isolation-characterization / Proteomics-mass-spec / Bulk-RNA-seq / Metabolomics-LC-MS / Proximity-labeling-BioID-APEX
• 関連遺伝子: CD9 / CD63 / CD81 / ALIX / TSG101 / Syntenin / SPP1
• 関連経路: Exosome-biogenesis-pathway / cGAMP-intercellular-signaling-pathway
• 関連概念: EV-mediated-intercellular-communication / Exosomal-PD-L1 / EV-organotropism / Tumor-derived-EV-cargo-biology / Pre-metastatic-niche

関連論文

Basic-Extracellular vesicles

• Clancy et al. AnnuRevPathol 2023 — Tumor-derived extracellular vesicles multifunctional entities in the tumor microenvironment
• Zhongyu et al. BiomedPharmacother 2024 — Review of pre-metastatic niches induced by osteosarcoma-derived extracellular vesicles in lung metastasis A potential
• Casanova-Salas et al. CancerCell 2024 — Circulating tumor extracellular vesicles to monitor metastatic prostate cancer genomics and transcriptomic evolution
• Wong et al. Cancers 2020 — Exosomal microRNAs and organotropism in breast cancer metastasis
• Nager et al. Cell 2017 — An actin network dispatches ciliary GPCRs into extracellular vesicles to modulate signaling
• Rahbarghazi et al. CellCommunSignal 2019 — Tumor-derived extracellular vesicles Reliable tools for cancer diagnosis and clinical applications
• Jin et al. FrontCellDevBiol 2021 — Rab GTPases Central coordinators of membrane trafficking in cancer
• Keire 2017 — Versican Role in cancer tumorigenesis
• Valencia et al. MethodMolBiol 2016 — Microvesicles isolation, characterization for in vitro and in vivo procedures
• Cai et al. MolCancer 2026 — Extracellular vesicles in solid tumors from tumor ecology to engineered therapeutics
• Mathieu et al. NatCommun 2021 — Specificities of exosome versus small ectosome secretion revealed by live intracellular tracking of CD63 and CD9
• Xu et al. NatRevClinOncol 2018 — Extracellular vesicles in cancer-implications for future improvements in cancer care

Basic-Liquid-biopsy

• vanDerPol et al. CancerCell 2019 — Toward the early detection of cancer by decoding the epitgenetic and environmental fingerprints of cell-free DNA

Basic-Oncogene and genetics

• Reggiardo et al. CellRep 2022 — Mutant KRAS regulates transposable element RNA and innate immunity via KRAB zinc-finger genes

合成 (Outputs)

• ev-liquid-biopsy-clinical-implementation