Disulfiram, a gasdermin D inhibitor, alleviates adenine-induced renal injury in mice

 

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Disulfiram, a gasdermin D inhibitor, alleviates adenine-induced renal injury in mice

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Saori
Kin
Saori Kin kin.saori.t8@dc.tohoku.ac.jp Tohoku University Hospital Department of Nephrology and Hypertension Sendai Japan *
Yuji Oe yuji.oe.b3@tohoku.ac.jp Tohoku University Hospital Department of Nephrology and Hypertension Sendai Japan -
Shun Ishigaki sishigaki97@gmail.com Tohoku University Hospital Department of Nephrology and Hypertension Sendai Japan -
Mariko Miyazaki mamiyaza@med.tohoku.ac.jp Tohoku University Hospital Department of Nephrology and Hypertension Sendai Japan -
Tetsuhiro Tanaka tetsuhiro.tanaka.d3@tohoku.ac.jp Tohoku University Hospital Department of Nephrology and Hypertension Sendai Japan -
 
 
 
 
 
 
 
 
 
 

Pyroptosis, a form of programmed inflammatory cell death mediated by caspase activation and gasdermin D (GSDMD) pore formation, has been implicated in acute kidney injury and various renal pathologies such as diabetic nephropathy and renal fibrosis. However, whether inhibition of this signaling would be beneficial in chronic kidney disease (CKD) remains unknown. Disulfiram, a clinically approved drug for alcohol dependence, has recently been identified as a potent inhibitor of GSDMD. Herein, this study aimed to investigate the therapeutic potential of disulfiram as a novel nephroprotective agent in CKD.

Experiment1: Eight-week-old male C57BL/6JJc mice were divided into four groups: (1) control diet, (2) disulfiram (0.1% diet), (3) 0.25% adenine diet, and (4) 0.25% adenine + disulfiram diet (0.1% diet). After 14 days of feeding, kidneys, blood, and urine were collected. Histological evaluation was performed with hematoxylin–eosin and Masson’s trichrome staining to assess tubular injury. Myeloperoxidase and CD68 positive cells, as makers of neutrophil and macrophage infiltration, were evaluated by immunohistochemistry. Quantitative PCR analyses were conducted to evaluate the expression of inflammasomes and pyroptosis-related genes and senescence-associated markers. Moreover, RNA-seq data from the kidney were subjected to enrichment analysis. Experiment 2: To investigate the potential of disulfiram to promote recovery after the onset of renal injury, mice received adenine for 2 weeks and were subsequently treated with disulfiram (0.1% diet) for 4 weeks before sample collection.

In Experiment 1, elevated BUN levels and tubular injury scores in adenine-treated mice were reduced by disulfiram. Immunohistochemistry demonstrated attenuation of neutrophil and macrophage infiltration in the kidney. In addition, disulfiram downregulated gene expression of inflammasomes and pyroptosis-related markers (Nlrp3, Gsdmd, Il1b, and Tnf) and senescence-related genes (p16 and p21) in the adenine-treated mice. Furthermore, RNA-seq–based enrichment analysis revealed that disulfiram administration upregulated pathways related to fatty acid oxidation and downregulated the neutrophil extracellular traps pathway.

In Experiment 2, disulfiram treatment after the induction of adenine-induced renal injury did not improve histological damage or the expression of pyroptosis- and proinflammatory cytokine–related genes in the kidney.

Disulfiram ameliorated the innate immune response and renal senescence in this model. This drug represents a novel therapeutic approach for CKD and may be particularly beneficial for preventing disease onset and early progression.

Kewords