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An untargeted metabolomics approach to study changes of the medium during human cornea culture

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Abstract

Introduction

Two main approaches (organ culture and hypothermia) for the preservation and storage of human donor corneas are globally adopted for corneal preservation before the transplant. Hypothermia is a hypothermic storage which slows down cellular metabolism while organ culture, a corneal culture performed at 28–37 °C, maintains an active corneal metabolism. Researchers, till now, have just studied the impact of organ culture on human cornea after manipulating and disrupting tissues.

Objectives

The aim of the current work was to optimize an analytical procedure which can be useful for discovering biomarkers capable of predicting tissue health status. For the first time, this research proposed a preliminary metabolomics study on medium for organ culture without manipulating and disrupting the valuable human tissues which could be still used for transplantation.

Methods

In particular, the present research proposed a method for investigating changes in the medium, over a storage period of 20 days, in presence and absence of a human donor cornea. An untargeted metabolomics approach using UHPLC-QTOF was developed to deeply investigate the differences on metabolites and metabolic pathways and the influence of the presence of the cornea inside the medium.

Results

Differences in the expression of some compounds emerged from this preliminary metabolomics approach, in particular in medium maintained for 10 and 20 days in presence but also in the absence of cornea. A total of 173 metabolites have been annotated and 36 pathways were enriched by pathway analysis.

Conclusion

The results revealed a valuable untargeted metabolomics approach which can be applied in organ culture metabolomics.

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Data availability

No datasets were generated or analysed during the current study.

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Authors and Affiliations

Authors

Contributions

MR and MC, designed the experiments; SA, MR, MC and SC performed the experiments, analyzed the data, and wrote the manuscript; SA and MR developed the untargeted metabolomics approach; MC and SC provided the samples and conducted the human cornea preservation and storage; SA and MR analyzed, elaborated and processed the data; SA, MR, MC and SC conceived the study and participated in its design and coordination. GC, GS, RMP, HBRA and JDT supervised and reviewed the manuscript. All authors have read and agreed to the final version of the manuscript.

Corresponding author

Correspondence to Simone Angeloni.

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Conflict of interest

All authors declare no conflict of interest.

Research involving human and animal rights

This article does not contain any studies with animal and human performed by any of the authors. The cornea used in the present work was not suitable for transplantation and for tissues appointed as not suitable for transplantation the characterization of medium is allowed for validating the medium capacity in maintaining active and operative the tissue metabolism, as it has been stated in the note of 23/12/2021 of Centro Nazionale Trapianti (CNT). Furthermore, even with suitable tissue, the developed analytical procedure does not require ethical committee approval. The methodology involves only the collection of small quantities of medium (the cornea is not manipulated and disrupted), which do not interfere with the organ culture.

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Ricciutelli, M., Angeloni, S., Conforti, S. et al. An untargeted metabolomics approach to study changes of the medium during human cornea culture. Metabolomics 20, 44 (2024). https://doi.org/10.1007/s11306-024-02102-5

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