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Core Synthesis and Mechanistic Framework

Liu et al. (Cell Death Discovery, 2025; 151 references) argue that exosomal cargo—miRNAs, lncRNAs, circRNAs, and proteins—constitutes a bidirectional communication system between cancer and stromal cells that regulates ferroptosis via three axes: iron metabolism (e.g., prominin-2–driven ferritin export in "iron-laden lorries"), lipid metabolism (e.g., CAF-derived miR-522 suppressing ALOX15; miR-3173-5p sponging ACSL4), and the GSH–GPX4 antioxidant system (e.g., CAF lncRNA DLEU1 upregulating SLC7A11) Specific exosomal ferroptosis cargos compiled. The review's strongest contribution is its cell-source taxonomy (cancer cells, CAAs, CAFs, TAMs, MSCs) and explicit acknowledgment that exosomes have a "binary" effect—some cargos promote ferroptosis (miR-144-3p in osteosarcoma), others inhibit it—a nuance often flattened in this literature.

Clinical Translation Claims: Promising but Preclinical-Only

Diagnostic claims rest on exosomal ferroptosis-related miRNAs/proteins (GPX4, ACSL4, 4-HNE) as liquid biopsy markers; therapeutic claims on engineered exosomes (erastin@FA-exo, RSL3-exo, Er/RB@ExosCD47 with CD47 camouflage, m654-sEV + sorafenib). All cited evidence is in vitro or xenograft-level; the authors correctly flag that large multi-center trials are absent and that exosome secretion/content changes with chemotherapy and hypoxia could confound diagnostic use Engineered exosome preclinical therapies.

Critical Blind Spots

The review does not quantify exosome doses, uptake efficiency, or in vivo tumor-to-organ ratios, and it self-cites its own ferroptosis diagram [151], a minor circularity. It correctly identifies heterogeneous exosome isolation methods as unstandardized but does not engage with the ongoing MISEV/ISEV debate over whether small-EV "exosome" fractions can be operationally distinguished. Immune effects are discussed mechanistically (M1/M2 polarization, NK ferroptosis via FSTL1–NCOA4) but never with patient cohort data Immune-cell ferroptosis mechanisms.

Verdict

A competently structured, citation-dense overview useful as an entry map to exosome–ferroptosis crosstalk. Confidence: moderate—it accurately summarizes primary studies but adds no quantitative synthesis or new data, and readers should verify cargo-specific claims against the primary sources.

Author Review: Na LiuAuthor Review: Tianqing WuAuthor Review: Guohu HanAuthor Review: Minbin Chen

 BGPT Paper Review

Study Novelty

Intersection of exosomes and ferroptosis has prior reviews; the cell-source taxonomy and open-questions framing add moderate but not transformative novelty.

Scientific Quality

Well-organized with 151 references and clear figures; weaknesses: non-systematic narrative format, minor naming inconsistencies (miR-3173-5p vs miR-3174-5p; FTH4 vs FTH1), self-citation of the ferroptosis diagram, and no quantitative synthesis.

Study Generality

Covers multiple cancers and all major TME stromal cell types, giving broad applicability, though each mechanism is tumor-type-specific.

Study Usefulness

Useful as a mechanistic map and for identifying cargo targets (miR-522, miR-4443, MTTP, ANGPTL4) and engineering strategies; limited direct clinical guidance.

Study Reproducibility

As a review, no primary methods; cited studies use heterogeneous exosome isolation, hindering cross-study reproducibility—acknowledged by the authors.

Explanatory Depth

Mechanistic chains from specific cargos to ferroptosis effectors (GPX4, ACSL4, SLC7A11, FSP1) are traced in detail, though molecular-level causality varies across cited primary studies.