腸内病原体の宿主内進化は肝臓の転移を容易にする
Yi Yang1, Mytien Nguyen1, Varnica Khetrapal1
1Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA.
Nature
|July 13, 2022
まとめ
Enterococcus gallinarumのような 腸内細菌の進化は 腸の障壁を横切って 炎症を起こします 粘膜の適応は免疫回避と疾患の発症を促進する.
科学分野:
- 微生物学
- 免疫学
- 遺伝学
背景:
- 腸内細菌は 免疫媒介性疾患を引き起こす可能性があります
- バクテリアの転移と病気の発生に影響を与える要因は完全に理解されていません.
- 腸内微生物群は宿主の中で進化し,病原性を潜在的に変化させる.
研究 の 目的:
- Enterococcus gallinarumの宿主内での進化が 転移し炎症を引き起こす能力にどのように影響するか調査する.
- 進化したバクテリア菌株が 免疫検出を回避し 病気を誘発するメカニズムを特定する
主な方法:
- エントロコッカス・ガリナラムの実験的進化
- 比較ゲノミクスは 遺伝的差異を分析します
- 宿主組織における細菌転移,免疫回避,炎症反応の評価
主要な成果:
- エントロコッカス・ガリナラムは 異なる性質を持つ 光線系と 粘膜系に分散した.
- 粘膜に適応した菌株は 転位,免疫回避,炎症の可能性が増加した.
- 調節性遺伝子の遺伝子変異と細胞壁の構造の変化は,病原性の増大と関連していた.
- 同じような進化パターンが Lactobacillus reuteri にも見られた.
結論:
- ホスト内の進化は,共生病原性を調節する重要な要因である.
- 宿主内の細菌の適応は,転移と免疫回避の増加につながる可能性があります.
- この進化の過程は 微生物群が誘発する病気の ストキャスティックな性質に寄与しています
さらに関連する動画
07:54Assessing Hepatic Metabolic Changes During Progressive Colonization of Germ-free Mouse by 1H NMR Spectroscopy
Published on: December 15, 2011
13.2K
07:34Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice
Published on: December 16, 2021
2.7K
関連する概念動画
01:17Hepatic Drug Excretion: Enterohepatic Cycling
1.7K
Enterohepatic cycling involves the active secretion of drugs and their metabolites into the bile via transporters in the canalicular membrane of hepatocytes. This secretion is an integral part of the digestive process, releasing these substances into the gastrointestinal (GI) tract.
Post-release drugs and metabolites can be reabsorbed into the body from the intestine. For conjugated metabolites like glucuronides, reabsorption requires enzymatic hydrolysis by intestinal microflora. This...
Post-release drugs and metabolites can be reabsorbed into the body from the intestine. For conjugated metabolites like glucuronides, reabsorption requires enzymatic hydrolysis by intestinal microflora. This...
1.7K
01:16Transduction
91
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
91
01:27Horizontal Gene Transfer
104
Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
104