Thymidine Phosphorylase Drives SARS-CoV-2 Spike Protein-Induced Lung Tumorigenesis.
[RATIONALE AND OBJECTIVES] COVID-19 survivors exhibit increased interstitial lung fibrosis, a known risk factor for lung cancer.
- 표본수 (n) 166,807
- p-value P < .001
APA
Wallace C, Gileles-Hillel A, et al. (2025). Thymidine Phosphorylase Drives SARS-CoV-2 Spike Protein-Induced Lung Tumorigenesis.. bioRxiv : the preprint server for biology. https://doi.org/10.64898/2025.12.14.694192
MLA
Wallace C, et al.. "Thymidine Phosphorylase Drives SARS-CoV-2 Spike Protein-Induced Lung Tumorigenesis.." bioRxiv : the preprint server for biology, 2025.
PMID
41473274
Abstract
[RATIONALE AND OBJECTIVES] COVID-19 survivors exhibit increased interstitial lung fibrosis, a known risk factor for lung cancer. We investigated whether SARS-CoV-2 Spike protein (SP)-induced lung injury and elevated thymidine phosphorylase (TYMP) promote lung tumorigenesis.
[METHODS] A TriNetX retrospective cohort analysis was combined with mechanistic studies in K18-hACE2 and K18-hACE2 / mice. Mice received intratracheal SP or control lysate followed by a urethane-induced lung cancer protocol. Lung injury, inflammation, thrombosis, fibrosis, STAT3 activation, cytokine profiles, and tumor burden were assessed. In vitro assays evaluated SP- and RBD-induced ACE2 processing.
[RESULTS] Propensity score-matched TriNetX cohorts demonstrated an increased lung cancer risk after COVID-19, particularly among current smokers (n = 166,807; RR 1.22; HR 1.50; P < .001). In mice, SP induced acute lung injury, neutrophil infiltration, and microthrombi, which were reduced in TYMP-deficient mice. SP markedly increased lung tumor incidence and aggressiveness, whereas TYMP deficiency reduced tumor formation from 50% to 18% of lung lobes. SP-induced STAT3 upregulation and collagen deposition were significantly attenuated in K18-hACE2 / mice. Cytokine profiling revealed a tumor-promoting, myeloid-dominant inflammatory milieu in K18-hACE2 mice, in contrast to a T cell-inflamed, anti-tumor profile in K18-hACE2 / mice. SP and RBD altered ACE2 processing, generating lower-molecular-weight fragments consistent with enhanced turnover.
[CONCLUSIONS] SARS-CoV-2 SP drives lung injury, fibrosis, and tumorigenesis through a TYMP-dependent mechanism involving STAT3 signaling and inflammatory microenvironment remodeling. COVID-19 significantly increases lung cancer risk, especially in current smokers.TYMP represents a potential therapeutic target to mitigate long-term pulmonary consequences of COVID-19.
[METHODS] A TriNetX retrospective cohort analysis was combined with mechanistic studies in K18-hACE2 and K18-hACE2 / mice. Mice received intratracheal SP or control lysate followed by a urethane-induced lung cancer protocol. Lung injury, inflammation, thrombosis, fibrosis, STAT3 activation, cytokine profiles, and tumor burden were assessed. In vitro assays evaluated SP- and RBD-induced ACE2 processing.
[RESULTS] Propensity score-matched TriNetX cohorts demonstrated an increased lung cancer risk after COVID-19, particularly among current smokers (n = 166,807; RR 1.22; HR 1.50; P < .001). In mice, SP induced acute lung injury, neutrophil infiltration, and microthrombi, which were reduced in TYMP-deficient mice. SP markedly increased lung tumor incidence and aggressiveness, whereas TYMP deficiency reduced tumor formation from 50% to 18% of lung lobes. SP-induced STAT3 upregulation and collagen deposition were significantly attenuated in K18-hACE2 / mice. Cytokine profiling revealed a tumor-promoting, myeloid-dominant inflammatory milieu in K18-hACE2 mice, in contrast to a T cell-inflamed, anti-tumor profile in K18-hACE2 / mice. SP and RBD altered ACE2 processing, generating lower-molecular-weight fragments consistent with enhanced turnover.
[CONCLUSIONS] SARS-CoV-2 SP drives lung injury, fibrosis, and tumorigenesis through a TYMP-dependent mechanism involving STAT3 signaling and inflammatory microenvironment remodeling. COVID-19 significantly increases lung cancer risk, especially in current smokers.TYMP represents a potential therapeutic target to mitigate long-term pulmonary consequences of COVID-19.