微重力诱导的免疫失调:不同基因表达的相位特异性概况
Martin Pelchat1, Guy Trudel2,3,4, Lynda Rocheleau1
1Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada.
Biochemistry and cell biology = Biochimie et biologie cellulaire
|October 7, 2025
概括
太空飞行改变了免疫基因表达,在微重力条件下显示免疫反应减少,飞行后免疫球蛋白水平增加. 这些发现提供了关于太空任务期间病毒延迟和免疫系统变化的见解.
科学领域:
- 太空生物学空间生物学
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 太空中的宇航员经历了潜伏病毒的重新激活,表明免疫系统的抑制.
- 免疫系统对微重力环境中的病原体的反应尚不清楚.
研究的目的:
- 在微重力暴露的不同阶段 (过渡,适应,恢复) 中分析白细胞的转录变化.
- 研究与太空飞行和床上休息相关的动态免疫基因表达模式.
主要方法:
- 从宇航员和模拟微重力 (向下倾斜的卧床休息) 模型中参与者的白细胞的纵向转录基因分析.
- 不同基因表达分析和鉴定基因的丰富分析.
主要成果:
- 微重力暴露导致免疫相关基因的表达减少,包括细胞因子,表明免疫反应被抑制.
- 基因表达模式在进入微重力和退出微重力过渡期间发生了转变,暴露后免疫球蛋白表达增加.
- 丰富分析突出了参与病毒反应和潜伏病毒重新激活的基因 (例如,IFNL1,TNFSF14,IL10,ISG15).
结论:
- 白细胞转录组分析揭示了太空飞行期间动态的,特定阶段的免疫基因表达变化.
- 这些发现为研究在太空任务期间体内病毒延迟和免疫调节提供了有价值的模型.
相关概念视频
02:32Position-effect Variegation
5.6K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
5.6K
02:32Exon Recombination
3.1K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.1K
01:28Diversity of Antigen Receptors
2.1K
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
2.1K
01:27Principles of Pharmacogenetics: Types of Genetic Variants
138
The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
138