相关实验视频
Updated: Jan 7, 2026
00:08
A Rapid In Vivo Bioassay for Developmentally Active Enhancers
1.4K
转录因子E93调节Mmp1的表达,以调节丸融合在Helicoverpa armigera的prepupal阶段
Kai Wang1, Mengdan Zhang1, Ping Zheng1
1Henan International Joint Laboratory of Green Pest Control, State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, College of Plant Protection, Henan Agricultural University, Zhengzhou 450046, China.
Journal of insect physiology
|December 24, 2025
概括
棉花球虫是一种棉花球虫.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 棉花虫 (Helicoverpa armigera) 是一个重要的农业害虫.
- 雄性生殖腺的发育,特别是幼虫-虫过渡期间的丸融合,至关重要,但不太了解.
- 了解这些机制可以导致新的害虫控制策略.
研究的目的:
- 为了阐明丸融合的调节机制在Helicoverpa armigera.
- 为了确定关键的基因和信号通路参与了这个发展过程.
- 探索害虫管理的潜在目标.
主要方法:
- 通过RNA干扰 (RNAi) 来击败HaE93和HaMmp1.
- 对比转录组分析以评估基因表达变化.
- 定量实时PCR (RT-qPCR) 用于验证基因表达.
- 交配试验和卵化能力测试,以评估男性的生育能力.
主要成果:
- HaE93敲击破坏了丸融合,影响了青春激素 (JH) 和20-基 (20E) 信号传递.
- HaE93 knockdown 改变了细胞外基质 (ECM) 和细胞粘附基因的表达.
- 在丸融合过程中,HaMmp1的表达达到峰值,其敲击导致了融合失败和男性生育能力下降.
- 与精子发生相关的基因在HaMmp1-knockdown的男性中被下调.
结论:
- 通过调节 HaMmp1 的表达,HaE93 调节丸融合.
- 在Helicoverpa armigera中,HaMmp1对于成功的丸融合和男性生殖成功至关重要.
- HaMmp1代表了开发遗传害虫管理策略的潜在目标,以诱导男性不育.
相关概念视频
02:23Master Transcription Regulators
7.6K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.6K
01:30General Transcription Factors
6.6K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
6.6K
02:16Transcription Factors
82.1K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.1K
02:33Combinatorial Gene Control
9.4K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
9.4K
02:36RNA Polymerase II Accessory Proteins
10.7K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
10.7K
01:23Role of Matrix Metalloproteases in Degradation of ECM
3.2K
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
3.2K