包括的なCRISPR/dCas9エピゲノムエディターのプロファイリングは、オンターゲットおよびオフターゲット効果間の複雑な関連性を示す
Majid Pahlevan Kakhki1, Fatemeh Rangani2, Ewoud Ewing2
1Department of Clinical Neuroscience, Karolinska Institutet, and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden. majid.pahlevan.kakhki@ki.se.
Genome biology
|January 31, 2026
まとめ
CRISPRエピゲノム編集ツールは有望であるが、オフターゲット効果を有する。CRISPRoffは、転写変化が持続するものの、オフターゲット効果が少なく、安定したプロモーターターゲティングを提供する。
科学分野:
- 分子生物学
- エピジェネティクス
- ゲノム編集
背景:
- DNAメチル化エピモジファイヤーを含むCRISPR/dCas9エピゲノム編集システムは、分子機能研究を進歩させてきた。
- 編集の大きさ、安定性、オフターゲット効果に関する課題は残っており、ツールの設計改善が必要とされている。
研究 の 目的:
- 経時的なdCas9ベースのDNAメチル化編集ツールのオンターゲットおよびゲノムワイドなオフターゲット効果を体系的に比較すること。
- 編集効率と特異性に対するツール設計(触媒ドメインのマルチマー化など)の影響を評価すること。
主な方法:
- 入手可能および新規のdCas9ベースDNAメチル化編集ツールの体系的な比較。
- 経時的な特異的ターゲティングおよびゲノムワイドなオフターゲット効果の評価。
- メチル化変化とその転写異常との関連性の分析。
主要な成果:
- DNAメチル化転移酵素3A触媒ドメインのマルチマー化は、編集効力を高めたが、広範なメチル化沈着を引き起こした。
- 非標的ガイドRNAは、代謝関連遺伝子におけるメチル化に依存しない転写変化を誘導した。
- CRISPRoffは、オフターゲット効果が少なく、効率的で安定したプロモーターターゲティングを示したが、転写変化は持続した。
結論:
- エピゲノム編集ツールの効力と特異性の間には、繊細なバランスが存在する。
- 本研究の結果は、意図しない結果を最小限に抑え、精度を向上させた将来のエピゲノム編集ツールの設計に洞察を提供する。
関連する概念動画
CRISPR
57.9K
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
57.9K
CRISPR and crRNAs
19.1K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
19.1K
Protein Complexes with Interchangeable Parts
2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K
Covalently Linked Protein Regulators
9.6K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
9.6K
X-linked Traits
58.6K
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
58.6K
Sex-linked Disorders
108.8K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
108.8K


