可溶性纤维的微生物发酵导致胆固醇性肝癌
Vishal Singh1, Beng San Yeoh2, Benoit Chassaing3
1UT-Microbiome Consortium, Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA.
Cell
|October 20, 2018
概括
饮食中可溶性纤维,如胰岛素,可以促进肠道细菌发酵成促进健康的短链脂肪酸 (SCFA). 然而,胰岛素摄入意外诱导了小鼠的肝癌 (HCC),突出了潜在的风险.
科学领域:
- 微生物学
- 肝病学
- 癌症学
- 营养科学
背景情况:
- 饮食中可溶性纤维被肠道微生物发酵成有益的短链脂肪酸 (SCFA).
- 消费可溶性纤维通常与改善代谢健康有关.
- 一种特定的可溶性纤维,因其对健康的影响而被研究.
研究的目的:
- 研究一种可溶性纤维的胰岛素对肝脏健康和癌症发展的影响.
- 确定肠道微生物群和发酵在因胰岛素引起的肝癌中的作用.
- 探索因胰岛素相关肝细胞癌 (HCC) 背后的机制.
主要方法:
- 向各种小鼠模型,包括异生物和野生类型 (WT) 的小鼠提供含有胰岛素的食.
- 在无细菌和接受抗生素治疗的小鼠中对影响进行比较,以评估微生物群的依赖性.
- 药理上抑制发酵和胆酸再吸收,以评估保护策略.
主要成果:
- 在多种异位生物小鼠中,胰岛素的摄入引起了肝细胞癌 (HCC).
- 在无细菌或接受抗生素治疗的小鼠中,HCC的发展依赖于微生物群.
- 在WT小鼠中,富含胰岛素的高脂肪饮食诱导了肠道失调和HCC,通过胆固醇和炎症进展.
- 抑制发酵或胆汁酸再吸收,防止因胰岛素引起的HCC.
结论:
- 虽然通常有利于健康,但像胰岛素这样的可发酵纤维可以以微生物群依赖的方式诱导肝癌 (HCC).
- 胰岛素诱导的HCC包括胆固醇,肝细胞死亡和中性细胞炎症.
- 由于可能增加HCC的风险,用可发酵纤维丰富食品需要谨慎.
关键词:
胆汁酸相关概念视频
Microbial Fermentation
1.5K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.5K
Fermentation
129.2K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
129.2K
Factors Affecting Solubility
37.1K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
37.1K
Solubility Equilibria
57.4K
Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
The...
57.4K
Solubility of Ionic Compounds
68.2K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.2K
Physical Properties Affecting Solubility
26.5K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
26.5K


