関連する実験動画
Updated: Feb 22, 2026

10:42
Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
18.0K
下細菌の単細胞プロファイリングは,転写異質性とニッチ固有のプログラムを明らかにします
Liguo Ding1, Lu Song2, Yibing Han2
1Department of Laboratory Medicine of the First Affiliated Hospital & Liangzhu Laboratory, Zhejiang University School of Medicine, Hangzhou, China.
Cell host & microbe
|February 20, 2026
まとめ
この研究では,単細胞RNA配列解析を用いて歯周炎中の口腔細菌の機能的変化を明らかにした. 主要な細菌の機能が変化し,疾患の進行に影響を与え,新たな治療標的を提供している.
科学分野:
- 微生物学 微生物学とは
- ゲノミクスゲノミクスとは
- 口腔衛生は,口腔の健康についてです.
背景:
- 歯周病は,細菌の不均衡 (ディスバイオシス) に関する慢性炎症性歯周病です.
- 単細胞レベルでバクテリアの機能的差異を理解することは極めて重要ですが,低バイオマスと宿主汚染のために困難です.
研究 の 目的:
- 下細菌群の高解像度分析のための単細胞RNA配列化フレームワークを開発し,適用する.
- 健康と歯周病の間に口腔細菌の機能的異質性を調査する.
主な方法:
- 単細胞RNA配列解析 (scRNA-seq) は,16個の下部のサンプルで実施されました.
- 分析には285種の133,458個の細胞が含まれており,57種の主活性種が特定されました.
- 機能的なクラスターと転写プロファイルは,健康状態と歯周炎状態との関係で分析されました.
主要な成果:
- 87の機能的なクラスターにグループ化された57のコア活性種のアトラスを生成しました.
- 粘着やポリサッカリドの分解などの健康に関連した機能は,歯周病で減少しています.
- アミノ酸代謝とタンパク質分解活性の変化は,P. intermedia,T. denticola,P. gingivalis.などの主要な病原体において観察されました.
結論:
- 単細胞プロファイリングは,歯周炎の際に下細菌の機能的専門化とシフトを明らかにします.
- 細菌の代謝と機能の変化は,疾患状態,低酸素,栄養素の利用可能性と相関しています.
- 研究結果は,歯周炎の病原性や,精密な診断と治療のための可能性についての洞察を提供します.
関連する概念動画
Modern Molecular Taxonomy
753
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
753
Bacterial RNA Polymerase
33.0K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
33.0K
Transcription Attenuation in Prokaryotes
18.7K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
18.7K
Genomic DNA in Prokaryotes
49.0K
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
49.0K
Coordination of Gene Expression Processes in Bacteria
732
The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...
732
Prokaryotic Gene Structure and Organization
2.4K
Prokaryotic genomes exhibit a streamlined organization of coding and non-coding regions essential for gene expression and protein synthesis. While coding regions contain the genetic instructions for proteins or functional RNAs, non-coding regions regulate the precise transcription and translation of these genes.Coding Regions: Proteins and RNAsThe primary coding regions, known as structural genes, include sequences transcribed into messenger RNA (mRNA) and ultimately translated into...
2.4K

