Lung Transplantation Dynamics and Graft Outcomes

Lung transplantation remains the definitive therapy for end-stage respiratory failure, yet it is challenged by a persistent shortage of suitable donor organs and the complex biology of graft preservation, implantation and recovery. Preservation strategies such as ex vivo lung perfusion (EVLP) have transformed assessment and reconditioning of marginal lungs by permitting detailed functional and biochemical evaluation prior to implantation. The immediate post-transplant period is dominated by ischaemia–reperfusion injury, which can precipitate primary graft dysfunction (PGD), a spectrum of acute lung injury that impairs early survival and predisposes to chronic rejection. Long-term graft outcomes hinge on the interplay between alloimmune responses, recipient comorbidities and perioperative management, including modes of extracorporeal support. Emerging approaches—spanning machine-learning algorithms to guide EVLP decisions, targeted cytokine removal, light-based pathogen inactivation and interventional cross-circulation—promise to expand the donor pool and attenuate injury cascades. Together, these advances are reshaping both organ utilisation and the immunological landscape of lung allografts, with the ultimate aim of improving recipient survival and quality of life worldwide.

Research from Nature Portfolio

Recent studies have demonstrated that integration of a machine-learning model into EVLP workflows can accurately predict post-transplant suitability and outcomes, leading to safer selection of donor lungs and increased transplantation rates. A second line of investigation has shown that adsorption of inflammatory cytokines during EVLP and via post-operative extracorporeal haemoperfusion significantly lowers inflammatory mediators, reduces histological injury markers and decreases the incidence of PGD in preclinical models. A complementary proof-of-concept study employed an interventional cross-circulation platform, wherein lungs rendered unusable by severe gastric-aspiration injury were regenerated through prolonged support and cell-level repair, thereby substantially expanding the pool of salvageable organs for transplantation.

Lung Transplantation Dynamics and Graft Outcomes publication trend

The graph below shows the total number of articles in lung transplantation dynamics and graft outcomes across all publications each year (not limited to Nature Index journals).

Technical terms

Ex vivo lung perfusion (EVLP): A technique for maintaining, assessing and treating donor lungs outside the body under normothermic, perfused conditions prior to transplantation.

Primary graft dysfunction (PGD): An acute, reperfusion-mediated lung injury occurring within 72 hours of transplant, characterised by pulmonary oedema, impaired oxygenation and radiographic infiltrates.

Ischaemia–reperfusion injury: Tissue damage initiated by the restoration of blood flow after a period of ischaemia, involving oxidative stress, endothelial activation and inflammatory cascades.

Extracorporeal membrane oxygenation (ECMO): A mechanical support system that oxygenates and circulates blood externally, used intraoperatively or postoperatively to support respiratory and/or cardiac function.

Cytokine adsorption: A therapeutic process in which inflammatory mediators are removed from perfusate or blood via sorbent devices to mitigate immune-driven tissue injury.

References

1. A machine-learning approach to human ex vivo lung perfusion predicts transplantation outcomes and promotes organ utilization. Nature Communications (2023).
2. Reduction of primary graft dysfunction using cytokine adsorption during organ preservation and after lung transplantation. Nature Communications (2022).
3. Regeneration of severely damaged lungs using an interventional cross-circulation platform. Nature Communications (2019).
4. Acellular ex vivo lung perfusate silences pro-inflammatory signaling in human lung endothelial and epithelial cells. Journal of Translational Medicine (2023).
5. Effect of mode of intraoperative support on primary graft dysfunction after lung transplant. Journal of Thoracic and Cardiovascular Surgery (2022).
6. Trends in Donation After Circulatory Death in Lung Transplantation in the United States: Impact Of Era. Transplant International (2022).