相关实验视频
Updated: May 17, 2025

11:29
miRNA Expression Analyses in Prostate Cancer Clinical Tissues
Published on: September 8, 2015
10.8K
Hsa-miR-21-5p和Hsa-miR-145-5p表达:从正常组织到恶性变化 - - 环境依赖与雌激素和缺氧-血管化相关途径的相关关系 基因:试点研究
Mateusz Górecki1,2, Aleksandra Żbikowska1, Małgorzata Tokłowicz1
1Department of Cell Biology, Poznan University of Medical Sciences, Rokietnicka 5D, 60-806 Poznań, Poland.
International journal of molecular sciences
|May 14, 2025
概括
这项研究发现,microRNAs (miRNAs) hsa-miR-21-5p和hsa-miR-145-5p在卵巢癌 (OC) 中表现异常. 这些miRNA可以作为潜在的诊断和预后生物标志物,用于早期检测这种妇科恶性瘤.
科学领域:
- 妇科瘤学 妇科瘤学
- 分子生物学分子生物学
- 生物标志物发现发现
背景情况:
- 卵巢癌 (OC) 是女性癌症相关死亡的主要原因,由于查有限,往往被诊断为晚期.
- 微RNAs (miRNAs) 参与癌症的发展和进展,使它们成为潜在的生物标志物.
研究的目的:
- 研究hsa-miR-21-5p和hsa-miR-145-5p作为卵巢癌的诊断和预后生物标志物.
- 探索这些miRNA与参与OC中雌激素依赖和缺氧新血管化途径的基因的相关性.
主要方法:
- 量化聚合酶连锁反应 (qPCR) 用于分析20个OC组织和20个对照中的miRNA和mRNA表达.
- 量化了hsa-miR-21-5p,hsa-miR-145-5p和选定的通路基因的表达水平.
主要成果:
- 与对照组相比,OC组织中观察到明显更高的hsa-miR-21-5p和较低的hsa-miR-145-5p表达.
- 在正常,非癌症和恶性卵巢组织中发现了miRNA表达的显著趋势.
- hsa-miR-21-5p显示出比hsa-miR-145-5p更强大的诊断潜力.
结论:
- hsa-miR-21-5p和hsa-miR-145-5p作为卵巢癌的预后和诊断标记物具有前途.
- 这些miRNA与OC中的特定途径基因之间的相关性取决于上下文,这表明了复杂的调节机制.
相关概念视频
Regulation of Angiogenesis and Blood Supply
2.5K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K
lncRNA - Long Non-coding RNAs
8.4K
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
8.4K
The Tumor Microenvironment
6.5K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.5K
Abnormal Proliferation
4.4K
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...
4.4K
MicroRNAs
2.9K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
2.9K

