10月25日，发表在《自然-化学》上的一项最新研究成果表明，“吃土”也能调节肠道微生物组和治疗肠炎。

科研团队受土壤组分启发，通过人工合成的方法构建由蒙脱土（天然土壤成分，俗称“观音土”）、淀粉颗粒和液态金属三种组分组成的土壤仿生材料，具有调控微生物功能的特质。这一具有响应性和调节性功能的新材料，不仅能提高微生物合成化学品的效率，还能够调节肠道菌群失调，恢复肠道微生态，在生物制造和生物医药领域有着应用潜力。

该成果由芝加哥大学完成，田博之教授为文章通讯作者，林艺良为文章第一作者和共同通讯作者，中国科学院深圳先进技术研究院合成生物学研究所副研究员高翔为文章共同第一作者。

附论文摘要

Abstract

Interactions between the microbiota and their colonized environments mediate critical pathways from biogeochemical cycles to homeostasis in human health. Here we report a soil-inspired chemical system that consists of nanostructured minerals, starch granules and liquid metals. Fabricated via a bottom-up synthesis, the soil-inspired chemical system can enable chemical redistribution and modulation of microbial communities. We characterize the composite, confirming its structural similarity to the soil, with three-dimensional X-ray fluorescence and ptychographic tomography and electron microscopy imaging. We also demonstrate that post-synthetic modifications formed by laser irradiation led to chemical heterogeneities from the atomic to the macroscopic level. The soil-inspired material possesses chemical, optical and mechanical responsiveness to yield write–erase functions in electrical performance. The composite can also enhance microbial culture/biofilm growth and biofuel production in vitro. Finally, we show that the soil-inspired system enriches gut bacteria diversity, rectifies tetracycline-induced gut microbiome dysbiosis and ameliorates dextran sulfate sodium-induced rodent colitis symptoms within in vivo rodent models.

编校：马 曦

审核：邹小勇