Translational model of melphalan-induced gut toxicity reveals drug-host-microbe interactions that drive tissue injury and fever

H. R. Wardill*, C. E. M. de Mooij, A. R. da Silva Ferreira, I. P. van de Peppel, R. Havinga, H. J. M. Harmsen, W. J. E. Tissing, N. M. A. Blijlevens

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

15 Citaten (Scopus)
64 Downloads (Pure)


Purpose Conditioning therapy with high-dose melphalan (HDM) is associated with a high risk of gut toxicity, fever and infections in haematopoietic stem cell transplant (HSCT) recipients. However, validated preclinical models that adequately reflect clinical features of melphalan-induced toxicity are not available. We therefore aimed to develop a novel preclinical model of melphalan-induced toxicity that reflected well-defined clinical dynamics, as well as to identify targetable mechanisms that drive intestinal injury.

Methods Male Wistar rats were treated with 4-8 mg/kg melphalan intravenously. The primary endpoint was plasma citrulline. Secondary endpoints included survival, weight loss, diarrhea, food/water intake, histopathology, body temperature, microbiota composition (16S sequencing) and bacterial translocation.

Results Melphalan 5 mg/kg caused self-limiting intestinal injury, severe neutropenia and fever while impairing the microbial metabolome, prompting expansion of enteric pathogens. Intestinal inflammation was characterized by infiltration of polymorphic nuclear cells in the acute phases of mucosal injury, driving derangement of intestinal architecture. Ileal atrophy prevented bile acid reabsorption, exacerbating colonic injury via microbiota-dependent mechanisms.

Conclusion We developed a novel translational model of melphalan-induced toxicity, which has excellent homology with the well-known clinical features of HDM transplantation. Application of this model will accelerate fundamental and translational study of melphalan-induced toxicity, with the clinical parallels of this model ensuring a greater likelihood of clinical success.



Originele taal-2English
Pagina's (van-tot)173-188
Aantal pagina's16
TijdschriftCancer Chemotherapy and Pharmacology
Nummer van het tijdschrift2
Vroegere onlinedatum20-apr.-2021
StatusPublished - aug.-2021

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