関連する実験動画
Updated: Jul 22, 2026

07:48
An Orthotopic Bladder Cancer Model for Gene Delivery Studies
Published on: December 2, 2013
13.0K
まとめ
研究者らは,ヒト膀がんの腫瘍遺伝子を特定し,マウスの細胞を変容させる. この腫瘍遺伝子は正常なDNAから発生し,他のがんの腫瘍とは異なるが,T24膀がん腫瘍遺伝子の関係がある.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 人間の膀癌細胞には,腫瘍発生の可能性のあるDNA配列が含まれています.
- これらの特定の腫瘍発生配列を特定することは,がんの発症を理解するために極めて重要です.
研究 の 目的:
- マウスの線維芽細胞の変容を担当するヒト膀がん細胞から特定の腫瘍性DNA成分を分離し,特徴づけること.
- この腫瘍遺伝子の起源と正常な細胞DNAおよび他の腫瘍由来腫瘍遺伝子の関係を決定する.
主な方法:
- 感染したマウスの細胞からラムダファグゲノムライブラリを使用して,腫瘍発生性の配列の分離.
- 活性 6.6 kb の挿入を pBR322 プラズミドベクトルにサブクローニングする.
- サブクローンされた腫瘍遺伝子を,通常の腫瘍DNA配列と他の腫瘍DNA配列との比較のために,サザンブロット分析のプローブとして利用する.
主要な成果:
- ヒト膀がん細胞から,変異活性を持つ6.6kbのDNA断片を成功裏に分離しました.
- 腫瘍遺伝子は,正常なヒトの細胞DNAに存在する配列から発生したと思われるが,明らかな構造的差異は検出されなかった.
- この特定の膀腫瘍遺伝子は,結腸,肺,または神経芽細胞腫の腫瘍細胞系に見られる変容配列とは無関係です.
- EJ膀腫瘍遺伝子とT24膀がん細胞系に活性化している腫瘍遺伝子の間には密接な関係があることが判明しました.
- いくつかの試験された膀がん細胞系では,腫瘍遺伝子の増幅がほとんどまたは全く観察されなかった.
結論:
- この研究では,ヒト膀癌の特定の腫瘍遺伝子を成功裏に分離し,特徴づけました.
- 腫瘍遺伝子の起源は正常な細胞DNAから生じ,外来遺伝物質の獲得というより活性化のメカニズムを示唆している.
- 発見は,異なる癌のタイプにおける腫瘍遺伝子の特異性を強調し,EJとT24膀がん細胞系の間に共有された腫瘍遺伝子を特定します.
さらに関連する動画
11:02Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice: A Model for Immunotherapy Development
Published on: October 31, 2013
21.7K
09:243-D Cell Culture System for Studying Invasion and Evaluating Therapeutics in Bladder Cancer
Published on: September 13, 2018
9.5K
関連する概念動画
Mismatch Repair
Overview
Cancer
Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...