三倍体Crassostrea gigas的转录组分析表明宿主免疫机制对抗细菌感染
Xiumei Liu1, Weijun Wang2, Haitao Zhao3
1College of Life Sciences, Yantai University, Yantai 264005, China.
概括
被Vibrio alginolyticus感染的三胞胎在组织中表现出关键的免疫反应. 这项研究确定了参与病防御的关键基因和途径,帮助水产养殖的可持续性.
科学领域:
- 水产养殖是水产养殖的一种方式.
- 海洋生物学 海洋生物学
- 免疫学 免疫学 免疫学
背景情况:
- (Crassostrea gigas) 在全球水产养殖中具有重要的经济价值.
- 细菌Vibrio alginolyticus感染对高密度养殖构成重大威胁.
- 组织对于的免疫防御对病原体至关重要.
研究的目的:
- 为了研究三角的免疫防御机制,以对抗Vibrio alginolyticus感染.
- 为了确定关键的基因和信号通路参与 gill免疫反应.
主要方法:
- 在感染后的不同时间点对三状的状组织进行转录组测序.
- 生物信息分析包括差异基因表达 (DEG) 分析,KEGG和GO功能丰富.
- 蛋白质与蛋白质相互作用网络分析以确定核心基因.
- 定量实时PCR (qRT-PCR) 用于基因表达的验证.
主要成果:
- 1746个差异表达基因 (DEGs) 在对V. alginolyticus感染的反应中被确定.
- 凯格和GO分析表明,PIK3-Akt和MAPK信号通路参与了免疫功能.
- CASP8,CASP9和PIK3CA被确定为的免疫防御网络中的核心基因.
结论:
- 三胞胎在受到V. alginolyticus的挑战时,会产生复杂的免疫反应,涉及特定的信号通路和关键基因.
- 这项研究为制定预防和控制和其他双贝类疾病的策略提供了科学基础.
- 这些发现支持水产养殖行业的可持续发展.
相关概念视频
02:53CRISPR and crRNAs
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
01:16Transduction
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
01:23The Antiviral System of Bacteria and Archaea: CRISPR
CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this defense.
01:18Bacterial Gastroenteritis
Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
01:28Amebiasis
Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...