相关实验视频

Updated: Jul 4, 2025

RNAi-mediated Gene Knockdown and In Vivo Diuresis Assay in Adult Female Aedes aegypti Mosquitoes

RNAi-mediated Gene Knockdown and In Vivo Diuresis Assay in Adult Female Aedes aegypti Mosquitoes

Published on: July 14, 2012

由积极选择驱动的新功能化导致了编码Aedes特定dsrna结合蛋白的loqs2基因的保留

Carlos F Estevez-Castro^1,2, Murillo F Rodrigues³, Antinéa Babarit²

¹Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.

|January 25, 2024

概括

艾迪斯蚊子拥有独特的抗病毒防御蛋白质Loqs2,它是通过基因复制和阳性选择进化而来的. 这种适应可能解释了它们在传播登革热和寨卡病毒等病毒方面的效率.

科学领域:

分子进化是分子进化的过程.
病毒学病毒学
昆虫学昆虫学是一门学科.

背景情况:

蚊子传播的病毒 (登革热,寨卡病毒) 每年造成数百万例感染,主要是由埃及蚊和白斑蚊传播的.
艾迪斯蚊子可能具有独特的适应性来缓解病毒感染.
Loqs2是一种特定于Aedes的双链RNA结合蛋白 (dsRBP),被确定为控制登革热和寨卡病毒感染的因素.

研究的目的:

研究loqs2基因的进化起源和功能特征.
了解loqs2在Aedes蚊子抗病毒防御机制中的作用.

主要方法:

遗传学分析,以追踪loqs2.qs的起源.
对loqs2和相关基因 (loqs,r2d2) 的比较进化分析.
在不同的组织和发育阶段进行基因表达分析.
转基因蚊子的生成以研究loqs2功能.

主要成果:

Loqs2起源于大约3100万年前的loqs基因复制.
在放松的净化选择和积极选择的证据下,Loqs2表现出更快的进化,这表明新功能化.
Loqs2主要局限于核中,并在生殖组织中表现出特定的表达.
转基因蚊子中loqs2的无处不在表达导致发育停止和广泛的基因失调.

结论:

Loqs2有一个独特的进化轨迹,由积极选择和新功能化驱动.
loqs2的独特特征代表了Aedes蚊子的潜在适应,有助于它们的载体能力.

关键词:

艾迪斯蚊子蚊子蚊子双链RNA (dsRNA) 是一种双链RNA.RNA干扰 (RNAi) 是一种RNA干扰.这是一种dsrna结合蛋白 (dsRBP).在loqs2qs2中使用.

更多相关视频

Using the GAL4-UAS System for Functional Genetics in Anopheles gambiae

Using the GAL4-UAS System for Functional Genetics in Anopheles gambiae

Published on: April 15, 2021

Effective Oral RNA Interference RNAi Administration to Adult Anopheles gambiae Mosquitoes

Effective Oral RNA Interference RNAi Administration to Adult Anopheles gambiae Mosquitoes

Published on: March 1, 2022

相关概念视频

Exon Recombination

Exon Recombination

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...

Non-LTR Retrotransposons

Non-LTR Retrotransposons

As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...

siRNA - Small Interfering RNAs

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...

Experimental RNAi

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...

piRNA - Piwi-interacting RNAs

piRNA - Piwi-interacting RNAs

PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...

RNA Interference

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...