ArticleLife science alliance2026
Cystatin C prevents tissue injury after lung transplantation.
Article in Life science alliance, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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16 authors.
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Abstract
Lung transplantation (LTx) offers life-saving therapy for end-stage lung disease, yet primary graft dysfunction (PGD) and bronchiolitis obliterans syndrome remain major complications, which limit long-term outcomes. The risk of PGD increases with prolonged storage and reperfusion injury. This study investigated the protective effects of cystatin C (CysC), a cysteine protease inhibitor, against PGD, through neutralization of cathepsin B activity. LTx recipients exhibited reduced levels of CysC and greater lung damage reflected by increased γ-H2AX and ACSL4 expression, correlating with poorer outcome. Using an orthotopic LTx model, we engineered CysC-Alb, an albumin-fused, cell-permeable CysC derivative for enhanced lung preservation. Adding CysC-Alb to preservation solutions during cold storage and ex vivo lung perfusion improved oxygenation, reduced DNA damage, and minimized cell death, particularly in alveolar type 2 cells. In murine grafts, CysC-Alb decreased γ-H2AX and ACSL4 expression, markers of DNA damage and ferroptosis, respectively. These findings highlight CysC-Alb as an effective additive to mitigate early pulmonary dysfunction after LTx and improve lung graft viability and transplantation outcomes.
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