肠道细菌通过减少性OsrABC途径代谢天然和合成类固醇激素
Christian Jacoby1, Kaylie Scorza1, Lia Ecker1
1Duchossois Family Institute, University of Chicago, Chicago, IL 60637, USA; Department of Microbiology, University of Chicago, Chicago, IL 60637, USA.
Cell host & microbe
|October 21, 2025
概括
肠道细菌Clostridium steroidoreducens通过OsrABC通路使类固醇激素失活. 这种微生物作用可以降低抗炎药物的有效性,如普雷尼索隆.
科学领域:
- 微生物学 微生物学
- 内分泌学 在内分泌学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 肠道微生物群通过类固醇激素代谢影响宿主生理.
- 对于类固醇激素失活的微生物途径尚未完全理解.
研究的目的:
- 识别和描述涉及类固醇激素代谢的微生物途径.
- 调查肠道细菌在基于类固醇的疗法的疗效中的作用.
主要方法:
- 隔离和识别了一种新的肠道细菌物种,Clostridium steroidoreducens.
- 转录基因分析和酶学发现以阐明OsrABC路径.
- 基因生物小鼠模型评估C. steroidoreducens对药物的生物可用性的影响.
主要成果:
- 降低降低皮质醇和相关类固醇到3β,5β-四类固醇产物.
- 描述了OsrABC通路,其中涉及减少酶OsrA,OsrB和OsrC.
- OsrA的目标是合成的皮质糖类药物,如普雷尼索隆,这是克罗恩病的治疗药物.
- 在小鼠中,C. steroidoreducens的殖民性降低了普雷迪尼索隆的生物可用性,这表明它干扰了药物的疗效.
结论:
- 通过C. steroidoreducens定义了一种用于类固醇激素失活的新型微生物途径.
- 这些发现为肠道细菌如何干扰抗炎类固醇疗法提供了机制基础.
- 关键酶的同类基因表明肠道微生物群中存在广泛的降低类固醇活性,这可能与克罗恩氏病等疾病有关.
关键词:
克罗恩氏病 克罗恩氏病是什么?铁-S 类风味酶.药物的生物可用性.葡萄糖皮质醇的新陈代谢我们的肠道微生物组.微生物组与药物相互作用普雷迪尼索隆 (prednisolone) 是一种药物.类固醇激素类激素类固醇激素的产生更多相关视频
相关概念视频
Transducer Mechanism: Nuclear Receptors
2.3K
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
2.3K
Phase I Reactions: Reductive Reactions
532
Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
532
Drug Metabolism: Phase II Reactions
4.8K
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
4.8K
Regulation of Metabolism
11.3K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
11.3K
Biosynthesis in Bacteria
514
Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
514
Hormones of the Adrenal Glands
4.4K
Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and...
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and...
4.4K


