抗生物質耐性は,耐性の進化を容易にする

Irit Levin-Reisman¹, Irine Ronin¹, Orit Gefen¹

¹Racah Institute of Physics and the Harvey M. Kruger Family Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Science (New York, N.Y.)

|February 11, 2017

まとめ

抗生物質耐性とは抗生物質の治療に耐性がない状態で生き残る能力で細菌の抗生物質耐性の進化を先行し促進することが判明しました耐性を防ぐことは,耐性の出現を遅らせる可能性があります.

科学分野:

微生物学
進化生物学
遺伝学

背景:

抗生物質耐性は世界的な健康上の脅威です
実験的進化は細菌における抗生物質耐性の発達を研究する.
断続的な抗生物質曝露は,細菌の耐性を迅速に選択することができるが,耐性の進化に対するその影響は不明である.

研究の目的:

耐性菌が抗生物質耐性の出現を遅らせるか促進するかどうかを調査する.
抗生物質耐性への進化の経路における耐性の役割を明らかにする.

主な方法:

抗生物質治療中の細菌の実験的進化
進化のダイナミクスを理解するための集団遺伝子の数学モデル化

主要な成果:

バクテリアの耐性は,すべての実験試験で抗生物質耐性の進化を一貫して先行した.
耐性突然変異が細菌集団内の耐性突然変異の拡散を促進することを数学的モデルが示した.
耐性は,その後の抵抗性の急速な進化への道を開くことが示されました.

結論:

バクテリアの耐性は抗生物質耐性の進化を加速させる上で重要な役割を果たします
抗生物質耐性の出現を遅らせるには耐性の進化を標的とするか防ぐことが有効な戦略です
耐性と耐性との相互作用を理解することは効果的な抗菌剤戦略の開発に不可欠です

さらに関連する動画

12:32

Quantification of Plasmid-Mediated Antibiotic Resistance in an Experimental Evolution Approach

Published on: December 14, 2019

14.8K

10:50

Design and Use of a Low Cost, Automated Morbidostat for Adaptive Evolution of Bacteria Under Antibiotic Drug Selection

Published on: September 27, 2016

10.2K

関連する概念動画

01:30

Development of Antibiotic Resistance

1.7K

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...

Antibiotic Selection

Transduction

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...

2.2K

01:31

Defense Against Bacterial Pathogens

3.2K

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...

Mismatch Repair

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...