在寄生虫Trichomonas vaginalis中的染色质可访问性和基因表达
Agustina Prat1, Daniela Muñoz1, Ayelen Lizarraga1
1Instituto Tecnológico Chascomús (INTECH), CONICET-UNSAM.
Research square
|January 7, 2025
概括
染色质可访问性影响Trichomonas vaginalis中的基因表达,影响寄生虫的毒性和耐药性. 这项研究揭示了这种常见的性传播感染的关键调节机制.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 寄生虫学的寄生虫学
背景情况:
- 阴道 (Trichomonas vaginalis) 是一种常见的性传播寄生虫,在全球范围内负责数以百万计的感染.
- 感染结果因宿主免疫力,微生物组和寄生虫菌株毒性而异,部分由基因表达控制.
- 在T. vaginalis中病毒性基因表达的调节机制仍然不太了解.
研究的目的:
- 调查T. vaginalis. 染色质可访问性和基因表达之间的关系.
- 为了比较一个高度粘附的,对甲基醇耐药的菌株 (B7268) 和一个粘附性较差的,对甲基醇敏感的菌株 (NYH209) 之间的这些调节机制.
主要方法:
- 使用测试用于转移酶可访问的染色体使用测序 (ATAC-seq) 结合RNA测序 (RNA-seq).
- 分析了两种不同的T. vaginalis菌株,具有对比的粘附性和耐药性表型.
主要成果:
- 在T. vaginalis两种菌株中,证明了染色质可访问性和基因表达之间的显著相关性.
- 确定了染色体可访问性作为与寄生虫病原和药物耐药性相关的基因mRNA水平的关键调节者.
- 发现了跨基因区域的开放色素区域,这表明了潜在的远端调节元素.
结论:
- 染色体的可访问性对于调节T. vaginalis. 的基因表达至关重要.
- 这些发现提供了对寄生虫病原体和药物耐药性的潜在治疗点的见解.
相关概念视频
Chromatin Position Affects Gene Expression
23.2K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.2K
What is Gene Expression?
166.8K
Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
166.8K
Heterochromatin
10.6K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
10.6K
Chromatin Immunoprecipitation- ChIP
11.0K
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
11.0K
Euchromatin
6.8K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.8K
Position-effect Variegation
6.3K
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.
6.3K


