マイコバクテリウム結核菌のATP合成に作用するダイアリルキノリンの薬です
Koen Andries1, Peter Verhasselt, Jerome Guillemont
1Johnson & Johnson Pharmaceutical Research and Development, Turnhoutseweg 30, 2340 Beerse, Belgium. kandries@prdbe.jnj.com
まとめ
新しい薬であるR207910は,薬剤に敏感なおよび薬剤耐性結核 (TB) に対して強力な活性を示しています. このダイアリルキノリンはマウスの治療を加速し,新しい結核治療の有望な候補である.
科学分野:
- 微生物学 微生物学とは
- 薬理学 薬理学とは
- 感染症 感染症は感染症です.
背景:
- 結核の発生率は,世界的に上昇しています.
- 40年間,新しい結核薬は開発されていない.
- 薬剤耐性結核は,公衆衛生に重大な脅威をもたらしています.
研究 の 目的:
- Mycobacterium tuberculosisに対する活性を持つ新しい化合物を特定し,特徴づけること.
- 結核の臨床前モデルにおけるR207910の有効性を評価する.
- ヒトボランティアにおけるR207910の安全性と耐受性を評価する.
主な方法:
- 薬剤に敏感で耐性のあるMycobacterium tuberculosisに対するR207910のインビトロ感受性試験.
- 結核のマウスモデルでのin vivo有効性研究.
- 健康なヒトボランティアにおける薬物動態および安全性評価.
- 薬剤の作用機構を明らかにするために,耐性突然変異体のインビトロ選択.
主要な成果:
- R207910は,Mycobacterium tuberculosisの強力な抑制を in vitro (MIC 0.06 μg/ml) で実証した.
- R207910は,イソニアジドとリファミンピンと比較して,マウスにおいて優越した殺菌活性を示した.
- ファーストラインの治療においてR207910を代用すると,細菌滅菌活性が加速し,一部の組み合わせでは完全な培養変換に至った.
- 一回投与されたR207910は,体内で1週間,菌根菌の増殖を抑制しました.
- この薬は,有効な用量で健康なヒトボランティアでよく耐えました.
- ミュータント選択の研究は,R207910がアデノシントリホスファート (ATP) 合成酵素の陽子ポンプを標的にすることを示唆しています.
結論:
- R207910は強力な新しいダイアリルキノリンで,薬剤に敏感なおよび薬剤耐性結核に対する有意な殺菌作用があります.
- R207910は治療を加速し,好ましい安全性プロファイルを示し,新しい結核治療の有望な候補となります.
- R207910の作用メカニズムの特定は,結核薬の開発のための新しいターゲットを提供します.
関連する概念動画
Allosteric Proteins-ATCase
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
Pulmonary Tuberculosis II
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis IV
Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Pulmonary Tuberculosis V
Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
Bacterial Phylum Actinobacteria
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
Tuberculosis
Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...


