関連する実験動画
Updated: Jun 21, 2026

14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
初等子宮頸がんにおけるクローナルp53変異:ヒトパピローマウイルス陰性腫瘍との関連
1Ludwig Institute for Cancer Research, St Mary's Hospital Medical School, London, UK.
Lancet (London, England)
|May 2, 1992
まとめ
ヒトパピローマウイルス (HPV) 感染症は,子宮頸がんにおけるp53遺伝子変異と逆相関しています. HPV陽性腫瘍は,主に野生型のp53を示しており,腫瘍抑制遺伝子の無活性化の異なるメカニズムを示唆しています.
科学分野:
- 腫瘍学 腫瘍学
- 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.
背景:
- ヒトパピローマウイルス (HPV) とp53腫瘍抑制遺伝子変異の逆相関は,門がんおよび細胞系において観察されています.
- 子宮頸がんはHPV感染と強く関連しており,p53遺伝子はがんで頻繁に変化する重要な腫瘍抑制剤です.
研究 の 目的:
- 主要子宮頸部腫瘍におけるHPV感染とp53遺伝子の体性変異の関連性を調査する.
- 子宮頸がんの病原性におけるp53遺伝子変異の役割を,HPVの状態との関係で理解する.
主な方法:
- サザンブロットとポリメラーゼ連鎖反応 (PCR) を用いてHPVDNAの存在を検出するための28個の原発性子宮頸腫瘍サンプルを分析した.
- HPVタイプ16と18の検出 16と18の検出
- p53遺伝子変異の評価は,非対称PCRを用いてコード領域全体をシーケンシングすることによって行われます.
- 制限断片長ポリモルフィズム (RFLP) を用いて染色体17の短腕のアレル欠失の分析.
主要な成果:
- 28例のうち25例 (89%) の子宮頸部腫瘍でHPVシーケンスが検出され,20例がHPV16陽性,5例がHPV18陽性であった.
- 分析された17の腫瘍で,染色体17の短腕のアレル欠失の証拠は見つかりませんでした.
- 3つのHPV陰性腫瘍のみが,p53遺伝子のヘテロジゴス点変異を示した.
- 対照的に,21のHPV陽性子宮頸がんは,分析地域全体で野生型のp53配列を示した.
結論:
- ワイルドタイプのp53機能の喪失は,子宮頸がんの病理学において極めて重要です.
- HPV陽性子宮頸がんでは,HPVでコードされたタンパク質がp53機能の喪失を媒介し,p53体格変異の必要性を回避する可能性がある.
- HPV媒介メカニズムがない場合,p53の無活性化にはp53遺伝子の体内の変異が必要である.
- HPV陽性対HPV陰性子宮頸がんにおけるp53変異の明確なパターンは,患者の予後における違いに寄与する可能性があります.
さらに関連する動画
関連する概念動画
Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Tumor Progression
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Mechanisms of Retrovirus-induced Cancers
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
Cancer-Critical Genes II: Tumor Suppressor Genes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Rous Sarcoma Virus (RSV) and Cancer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
Mechanisms of Retrovirus-induced Cancers
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...

