ヒトB型肝炎ウイルスのコアプロモーター領域にある肝臓特有の強化剤
1Department of Pediatrics, School of Medicine, University of California, San Diego, La Jolla 92093.
Science (New York, N.Y.)
|November 3, 1989
まとめ
新しく特定されたB型肝炎ウイルス (HBV) プロモーター断片は,肝臓細胞の遺伝子発現を強化する. この発見は,HBV感染,肝炎,および肝がんの発症の理解を助けます.
科学分野:
- ウイルス学 ウイルス学 ウイルス学
- 分子生物学は分子生物学である.
- 肝臓病理学 肝臓病理学
背景:
- ヒトB型肝炎ウイルス (HBV) のコアプロモーター領域は,ウイルスの遺伝子発現を調節する.
- HBV遺伝子調節の理解は,肝炎と肝細胞癌に対処するために不可欠です.
- 以前のHBV増強剤は特定されていますが,その完全な機能についてはさらなる研究が必要です.
研究 の 目的:
- HBVのコアプロモーターにある新しい88塩基対の断片を特徴付ける.
- この断片内の肝臓特異的な強化剤の活性を調べるために.
- 遺伝子発現を刺激する際の有効性を,前述のHBV増強剤と比較するために.
主な方法:
- HBVコアプロモーターから88塩基対のDNA断片を分析した.
- 強化剤の活性性を評価するためにヒト肝腫細胞における機能的測定法.
- クロランフェニコルアセチルトランスフェラーゼ (CAT) 遺伝子のクローン化と発現は,エンハンサー・プロモーター領域に関連しています.
主要な成果:
- 88塩基対の断片は,機能的プロモーターと強力な肝臓特異的強化剤の両方を含んでいます.
- この新しい増強剤は,以前に知られているHBV増強剤よりも,肝腫細胞における活性性が著しく高いことを示しています.
- 関連する細菌のクロラムフェニコルアセチルトランスフェラーゼ遺伝子発現の強化が観察されました.
結論:
- 肝臓特有の強力な増強剤は,HBVのコアプロモーター領域に存在する.
- この増強剤は,肝細胞におけるHBV遺伝子発現を誘導する上で重要な役割を果たします.
- このエンハンサー・プロモーターに関するさらなる研究は,HBVの病原性および肝がんのメカニズムを明らかにする可能性がある.
さらに関連する動画
10:25"Liver-on-a-Chip" Cultures of Primary Hepatocytes and Kupffer Cells for Hepatitis B Virus Infection
Published on: February 19, 2019
11:34A Competent Hepatocyte Model Examining Hepatitis B Virus Entry through Sodium Taurocholate Cotransporting Polypeptide as a Therapeutic Target
Published on: May 10, 2022
関連する概念動画
02:40The Eukaryotic Promoter Region
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
02:42Eukaryotic Transcription Activators
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
01:52Eukaryotic Transcription Inhibitors
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
02:40The Eukaryotic Promoter Region
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
01:25Hepatitis
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
01:28Viral Hepatitis I: Introduction
Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...