Multi-Component Osmolyte-Based Solvents Tuned to Mimic Intracellular Environments

Multi-component osmolyte-based deep eutectic solvents inspired by biological systems exhibit highly tunable thermal phase transitions governed by intricate hydrogen-bond networks, with water fraction playing a pivotal role in modulating stability. Investigating formulations designed to mimic complex intracellular environments, researchers Priyanka Yadav, Akshat Satyanarayan Mallya, Elyssa Meixner, and Allison Hubel at the University of Minnesota Twin Cities systematically evaluated mixtures based on naturally occurring metabolites, including amino acids, sugars, sugar alcohols, urea, and trimethylamine N-oxide.

The study coupled COSMO-RS computational screening with experimental characterization across binary, three-component, four-component, and six-component systems. Using polarized optical microscopy, Differential Scanning Calorimetry, and pH measurements, the team evaluated how increasing compositional complexity influences thermophysical properties, including melting temperature, glass transition temperature, latent enthalpy of melting, and pH.

Experimental validation demonstrated significant depression of melting temperatures in amino-acid-based mixtures at low water mole fractions, recording −30.09 °C for proline:betaine and −28.93 °C for proline:sarcosine, consistent with strong eutectic interactions. The addition of sugars and sugar alcohols enabled fine-tuning of thermal and pH profiles, with select combinations preserving an alkaline pH even at elevated hydration levels.

Among binary systems, TMAO:Gua reached a peak melting temperature of −46.13 °C at a water mole fraction of 0.71, while a multicomponent formulation containing TMAO, betaine, taurine, and urea attained a minimum peak melting temperature of −43.78 °C at a water mole fraction of 0.61. The authors noted that combining computational predictions with experimental measurements advances the rational design of sustainable, biocompatible solvents for biotechnological applications such as biomolecular stabilization.

Subject of Research: Thermophysical properties of multi-component osmolyte-based deep eutectic solvents

Article Title: Engineering Osmo-DESs through computational screening and thermophysical validation for pharmaceutical technologies

Article References: Yadav, P., Mallya, A. S., Meixner, E., & Hubel, A. (2026). Engineering Osmo-DESs through computational screening and thermophysical validation for pharmaceutical technologies. Frontiers in Medical Technology, 8, Article 1996526. https://doi.org/10.3389/fmedt.2026.1996526

Image Credits: AI Generated

DOI: 10.3389/fmedt.2026.1996526

Keywords: Deep Eutectic Solvents, Osmo-DESs, Osmolytes, Differential Scanning Calorimetry, COSMO-RS, Phase Transitions, Biomolecular Stabilization, Thermophysical Properties, Engineering, computational, screening, thermophysical