約9000人の患者サンプルにおけるエンハンサー発現の全がん分析
Han Chen1, Chunyan Li2, Xinxin Peng1
1Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Cell
|April 7, 2018
まとめ
科学者たちは 何千もの癌のサンプルから 活性増強物質である 重要なDNA要素を特定しました 増強剤の活動は 単なる変異ではなく 癌の複雑性に関連しており PD-L1のような 重要な遺伝子を調節し 新しい治療標的を提供することができます
科学分野:
- ゲノミクス
- 癌 生物学
- エピジェネティクス
背景:
- 増強剤は,非コーディングの調節性DNA要素の重要なクラスであり,癌の発達における役割としてますます認識されています.
- 様々な癌の活性増強剤の理解は 癌の生物学を解読し 治療目標の特定に不可欠です
研究 の 目的:
- ガンゲノムアトラス (TCGA) のRNA-seqデータを用いて,全ゲノムで発現した増強剤を検出および特徴づけること.
- 増強剤の活性とアヌプロイド性や変異負荷などのゲノム特性の関連性を調査する.
- 遺伝子の因果的な相互作用を計算的に推論し,臨床的に有効な遺伝子の増強剤を特定する.
主な方法:
- TCGAからの8928の腫瘍サンプルにおける発現強化剤の全ゲノム分析.
- 腫瘍における増強剤の活性と正常な組織との比較分析
- 強化剤-遺伝子相互作用を推論するためのeQTL,mRNA共同発現,およびHi-Cデータの統合.
- PD-L1遺伝子の近くに1つを含む,特定された強化剤の実験的検証.
主要な成果:
- 一般的な増強剤の活性化は,正常な組織と比較してほとんどの癌のタイプで観察されました.
- 全球増強剤の活性度は陽性と相関しているが,変異負荷とは関係なく,染色体状態に基づく相互作用を示唆している.
- 臨床的に重要な遺伝子の増強剤を特定し,因果的な増強剤-遺伝子相互作用を計算方法によって得られた.
- 免疫療法の主要標的であるPD- L1の約140kb下流の強化剤が特定され,実験的に検証されました.
結論:
- この研究は,腫瘍の幅広い文脈における増強剤の活性に関する包括的な見解を提供します.
- 増強剤の活性性は,がんの発症の重要な要因であり,クロマチンの状態とアヌプロイドが潜在的に影響する.
- 特定された強化剤-遺伝子相互作用,特にPD-L1のような標的は,がん治療における強化剤の臨床的影響を強調する.
関連する概念動画
01:21Cancer Survival Analysis
774
Cancer survival analysis focuses on quantifying and interpreting the time from a key starting point, such as diagnosis or the initiation of treatment, to a specific endpoint, such as remission or death. This analysis provides critical insights into treatment effectiveness and factors that influence patient outcomes, helping to shape clinical decisions and guide prognostic evaluations. A cornerstone of oncology research, survival analysis tackles the challenges of skewed, non-normally...
774
01:21Sample Preparation for Analysis: Overview
3.8K
Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
3.8K
01:08Sample Preparation for Analysis: Advanced Techniques
1.5K
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
1.5K
03:00Self-Evaluation: Self-Enhancement and Self-Verification
5.8K
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
5.8K
01:16Bioavailability Enhancement: Drug Solubility Enhancement
273
Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
273
01:27Bioavailability Enhancement: Drug Permeability Enhancement
213
Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
213