线粒体序列的遗传变异和来自不同大陆的Echinococcus multilocularis菌株的病理差异
Baoping Guo1,2, Gang Guo1,2, Wenjing Qi1
1State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
Microbiology spectrum
|February 14, 2025
概括
狐带虫 Echinococcus multilocularis 在各个菌株中表现出遗传和病理差异. 阿拉斯加菌株 (EM-AK) 在进化上是遥远的,在小鼠中会导致更严重的肝损伤和寄生虫的产生.
科学领域:
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 由 Echinococcus multilocularis 引起的状状菌是一种严重的动物性疾病.
- 在E. multilocularis菌株中,遗传多样性和病原性变异尚未得到充分理解.
研究的目的:
- 为了比较四种E. multilocularis菌株 (EM-AK,EM-JP,EM-XJ,EM-NX) 的遗传和病理差异.
- 分析进化距离和宿主对不同菌株的免疫反应.
主要方法:
- 完成了四种E. multilocularis菌株的线粒体 (mt) DNA测序.
- 在小鼠模型中进行病理病变分析.
- 遗传学分析和节网络建设.
主要成果:
- 与其他菌株相比,EM-AK显示出0.84%-0.86%的变异,表明遗传距离更大.
- 遗传学分析显示,EM-AK在进化上与其他物种相差约3万年.
- 在小鼠中,EM-AK诱导了更严重的肝病理,宿主细胞透,颗粒瘤形成和前列细胞的产生.
- EM-JP表现出类似于E.颗粒菌的病变,但产生了较少的原生结核病.
结论:
- 在E. multilocularis菌株之间存在显著的遗传和病理差异.
- 在EM-AK中,表现出一种更有毒的表型,可能会影响寄生虫传播.
- 这些独特的菌株作为研究宿主寄生虫相互作用和免疫反应的有价值的模型.
相关概念视频
Animal Mitochondrial Genetics
7.4K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
7.4K
Evolutionary Relationships through Genome Comparisons
5.7K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.7K
Genetic Variation
256
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
256
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.0K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
12.0K
Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
Mutation, Gene Flow, and Genetic Drift
57.8K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
57.8K


