ネズミの世代を超えて記憶されたエピジェネティック変化
PubMedで要約を見る
まとめ
この要約は機械生成です。ネズミでは世代を超えたエピジェネティック遺伝子が示されている. 研究者はDNAのメチル化変化を誘導し 代々受け継がれ 代謝に影響を与えました
科学分野
- エピジェネティクス
- 哺乳類の遺伝学
- メタボリック障害
背景
- 哺乳類における世代を超えた表遺伝子遺伝は依然として議論の余地がある.
- エピジェネティックマークの仕組みを理解することは 極めて重要です
研究 の 目的
- 既得の表遺伝的変異の安定的な遺伝を調査する.
- これらの改変が代謝現象型に及ぼす影響を研究する.
主な方法
- 代謝に関連する遺伝子のCpG島 (CGI) でのDNAメチル化誘導
- 幾世代に渡って表遺伝的変化と代謝現象の拡散を監視する.
主要な成果
- プロモーター関連CGIで得られたDNAメチル化が成功しました.
- これらのエピジェネティック変異と関連する代謝現象は,研究されたマウスの複数の世代にわたって安定的に継承された.
結論
- この研究は,哺乳類における獲得された代謝特性の安定した世代間の表遺伝子遺伝に関する証拠を提供する.
- この研究は,表遺伝子遺伝のメカニズムと影響を研究するためのモデルを提供します.
関連する概念動画
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
The Process
Genes can be randomly knocked out, or specific genes can be targeted. To knock out a particular gene, an engineered piece of DNA called a targeting vector is used...

