プロメタスタティック tRNA 経路
1Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.
Cell
|June 4, 2016
まとめ
2つの転送RNA (tRNAs) は転移性乳がんにおいて上位調節され,特定のトランスクリプトの安定性と翻訳を高めます. これは癌の転移を促進するタンパク質の産生を増加させる.
科学分野:
- 分子生物学
- 癌 研究
- 遺伝学
背景:
- 転送RNA (tRNA) は,タンパク質合成とグローバルな遺伝子発現の調節に不可欠です.
- 異常なtRNA発現は,がんを含む様々なヒト疾患に関与しています.
研究 の 目的:
- 転移性乳がんの進行における特定のtRNAの役割を調査する.
- 向上調節されたtRNAががん細胞の遺伝子発現に影響を与えるメカニズムを解明する.
主な方法:
- 転移性乳がん細胞におけるtRNA発現プロフィールの分析
- コドン濃縮トランスクリプトのトランスクリプト安定性と変換効率の評価
- tRNAのアップレギュレーションによって生産が調節される特定のタンパク質の識別.
主要な成果:
- 2つの特定のtRNAは,転移性乳がん細胞で有意にアップレギュレーションされていることが判明しました.
- これらの上位調節されたtRNAは,対応するコドンを含むメッセンジャーRNA (mRNA) の安定性とトランスレーションを高めます.
- 癌細胞の侵入と拡散に寄与する.
結論:
- アップレギュレーションされたtRNAは,タンパク質合成を調節することによって,乳がんの転移を促進する直接的な役割を果たします.
- これらの特定のtRNAまたはその下流効果をターゲットにすることで,転移性乳がんに対する新しい治療戦略を提供することができます.
関連する概念動画
02:30Metastasis
6.8K
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
6.8K
02:26tRNA Activation
23.7K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
23.7K
02:26tRNA Activation
8.9K
8.9K
03:03mTOR Signaling and Cancer Progression
5.0K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
5.0K
03:03mTOR Signaling and Cancer Progression
1.6K
1.6K
02:33Initiation of Translation
40.0K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
40.0K