バレットのメタプラジアは
J A Jankowski1, R F Harrison, I Perry
1Division of Medical Sciences, University of Birmingham, UK. J.jankowski@bham.ac.uk
Lancet (London, England)
|January 6, 2001
まとめ
エソファゲアルアデノカルシノーマの発生率は,世界的に上昇しています. バレットの食道進行を誘発する遺伝的および環境的要因を理解することは,この癌前病変に対する早期介入戦略の開発の鍵です.
科学分野:
- 胃腸内科 胃腸内科
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
背景:
- 西洋諸国では食道腺がんの発生率が上昇しています.
- 後期発症は,患者の予後が悪いことにつながります.
- 現在の初期段階の介入は,費用対効果が低い.
研究 の 目的:
- バレットの食道 (Barrett's oesophagus) を予防するための戦略を調査する.
- メタプラスティック病変の進行における遺伝子と環境の相互作用を解明する.
- 食道がんの発症を誘発するメカニズムを理解する.
主な方法:
- 食道腺がんとバレット食道に関する現在の文献のレビュー.
- 癌の進行における遺伝的,環境的,および表遺伝的要因の分析.
- メタプラスチックの変換におけるマイクロ環境の役割の検討.
主要な成果:
- 癌の進行を促進する3つの主要なメカニズムを特定した: 細菌系変異/ポリモルフィズム,散発的変異発生,および表遺伝的変異.
- 地元で産生されるサイトカインと胆酸が逆流症における役割を強調した.
- メタプラスティック幹細胞に対するマイクロ環境の直接的な影響を実証した.
結論:
- バレットの食道予防への新たな関心は極めて重要です.
- メタプラジアの分子駆動因子を理解することは,早期がん予防に不可欠です.
- マイクロ環境をターゲットにすることで,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
Metastasis
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...
Barrett Esophagus-I: Introduction
Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more similar...
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more similar...
Barrett Esophagus-II: Clinical Manifestations and Management
Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure entails...
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure entails...
Cellular Adaptation IV: Dysplasia and Metaplasia
DysplasiaDysplasia refers to abnormal changes in the size, shape, and organization of mature cells, characterized by pleomorphism, nuclear abnormalities, and increased mitotic activity. It commonly affects epithelial tissues, including the cervix, gastrointestinal tract, respiratory mucosa, and endometrium. Although it may occur alongside hyperplasia, dysplasia is not a true adaptive response but a preneoplastic change with potential to progress to cancer.When confined above the basement...
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features
Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
Gastritis II: Pathophysiology
The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...


![Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60445.jpg&w=3840&q=50)