スプライシング調節に関連するLncRNAの遺伝子変種と卵巣がんの発生への影響
Lingxiao Zou1, Meng Zhang2, Shan He1
1Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China.
Functional & integrative genomics
|September 2, 2025
まとめ
この研究は,非コーディングRNAスプライシング定量特征ロシ (lncRNAsQTLs) が,遺伝子スプライシングを変化させることで,卵巣がん (OC) リスクにどの程度影響しているかを明らかにしています. これらの発見は,OCの早期発見と治療のための潜在的な新しいバイオマーカーを提供します.
科学分野:
- ゲノミクス
- 癌 生物学
- 分子遺伝学
背景:
- 卵巣がん (OC) には,がんにおける長い非コーディングRNA (lncRNAs) の知られた調節作用にもかかわらず,効果的な早期発見バイオマーカーが欠けている.
- RNA スプライシングの制御不全はがんにおいて一般的であり,スプライシングの調節因子の遺伝的変異は疾患の発達に影響を与える可能性があります.
研究 の 目的:
- OCにおける lncRNA スプライシング 定量特征ロシ (sQTLs) を包括的に分析する.
- OCにおける lncRNA sQTL の規制メカニズムと機能的影響を調査する.
- OCの潜在的な lncRNAベースのバイオマーカーを特定する.
主な方法:
- イベントレベルとトランスクリプトレベルの両方で21,129 lncRNA sQTL を特定するために202 OC サンプルの分析.
- lncRNAsQTLsとlncRNA発現量的な特征ロシ (eQTLs) の比較
- 調節要素におけるsQTLの濃縮分析とlncRNA-splicing factor-mRNA調節ネットワークの構築
- ゲノム・ワイド・アソシエーション・スタディ (GWAS) のデータと統合し,特定のsQTLをOCリスクと関連付けます.
主要な成果:
- lncRNA sQTLは lncRNA eQTLと異なっており,調節された遺伝子はがん経路,免疫浸透,薬物感受性に関与しています.
- lncRNAsQTLは,スプライシング因子 (SF) の結合部位を含む規制要素に富んでいる.
- 特定の lncRNA sQTL (rs1549334) は HOXD3 遺伝子のスプライシングを変化させ,OC リスクに影響を与えることが判明しました.
結論:
- lncRNAsQTLは,変異した遺伝子スプライシングを通じてOCの病原性において重要な役割を果たします.
- これらの発見は,OCのスプライシング規制に関する新しい洞察を提供します.
- lncRNAsQTLは,早期のOC検出と治療目標の有望な候補である.
関連する概念動画
01:32RNA Splicing
56.9K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
56.9K
02:39lncRNA - Long Non-coding RNAs
8.9K
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
8.9K
02:18Alternative RNA Splicing
21.7K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.7K
01:36What is Gene Expression?
9.1K
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
9.1K
01:22MicroRNAs
3.1K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.1K
01:23Regulation of Expression at Multiple Steps
994
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
994