緊張関係：水素資化性メタン菌のメチルジエタノールアミンに対する生体適合性とトランスクリプトーム応答（バイオ統合型炭素回収・利用における）
Strained Partnership: Biocompatibility and Transcriptomic Responses of Hydrogenotrophic Methanogens to Methyl Diethanolamine in Bio-integrated Carbon Capture and Utilization (原題)
Madhuni M. Wijesooriya, Mathias Eskildsen, Jeppe L. Nielsen, Michael Vedel Wegener Kofoed
🤖 gxceed AI 要約
日本語
本研究は、CO2回収溶媒MDEAと微生物メタン生成を組み合わせたバイオ統合型CCU（BICCU）の実現可能性を検討。MDEAが2種のメタン菌に毒性を示し、株により感受性が異なることを発見。トランスクリプトーム解析から、ストレス応答にエネルギーを振り向ける代謝トレードオフが示唆された。より生体適合性の高い溶媒や耐性株の選定が今後の課題。
English
This study evaluates the feasibility of bio-integrated carbon capture and utilization (BICCU) combining CO2-capture solvent MDEA with microbial methanogenesis. MDEA exhibited toxicity to two methanogens, with strain-dependent sensitivity. Transcriptomic analysis revealed a metabolic trade-off reallocating energy to stress responses. Future work should focus on more biocompatible solvents and resilient strains.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本ではCCUS技術の社会実装が進められており、本研究成果はバイオ由来メタン生産の効率化に寄与する可能性がある。ただし、実用化には毒性低減やコスト課題が残る。
In the global GX context
Globally, BICCU is an emerging approach for decarbonization, but solvent toxicity is a key barrier. This study provides fundamental insights into strain-specific responses, informing the design of more efficient bio-based carbon capture systems.
👥 読者別の含意
🔬研究者:Provides transcriptomic evidence of methanogen stress responses to MDEA, informing strain selection for BICCU.
🏢実務担当者:Highlights the need for biocompatible solvents and robust microbial strains when developing BICCU processes.
📄 Abstract（原文）
Abstract Biointegrated carbon capture and utilization (BICCU) represents a promising alternative to conventional carbon capture technologies, combining microbial methanogenesis with CO2 capture agents, such as methyl diethanolamine (MDEA), to produce renewable methane from dilute CO2 sources. However, the biotoxicity of these solvents poses a major challenge to the viability of the BICCU approach. This study investigates the biocompatibility and physiological responses ofMethanococcus maripaludis and Methanosarcina barkeri to MDEA, through batch experiments and transcriptomic analysis. Both methanogens exhibited inhibited methane production when exposed to MDEA, with M. barkeri displaying higher sensitivity. M. maripaludis maintained the highest CH4 production rate at 30 mmol/L MDEA, while M. barkeri was almost fully inhibited at this concentration. Transcriptomic analysis revealed upregulation of genes associated with S-layer formation, cell envelope biogenesis, glycosyltransferase activity, and ion transport, alongside downregulation of lysine biosynthesis and secretion system genes. These findings suggest a metabolic trade-off, where cellular energy is reallocated toward stress response mechanisms. Results demonstrate that, while MDEA can be integrated with microorganisms, the exact response will depend on the methanogenic strain. Future research should focus on more biocompatible solvents and the selection of resilient methanogenic strains.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.est.6c01434first seen 2026-09-08 04:41:12
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