インフルエンザウイルスの抗原的および遺伝的進化のマッピング

Derek J Smith¹, Alan S Lapedes, Jan C de Jong

¹Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. dsmith@zoo.cam.ac.uk

Science (New York, N.Y.)

|June 26, 2004

まとめ

インフルエンザA (H3N2) ウイルスの進化は1968年から2003年まで研究された. 抗原的変化は遺伝的変化よりも急激で,ワクチンの有効性や株の予測に影響を与えました.

科学分野:

ウイルス学ウイルス学ウイルス学
免疫学免疫学とは
エピデミオロジーエピデミオロジー

背景:

A型インフルエンザ (H3N2) ウイルスは絶えず進化しており,ワクチンの更新が頻繁に行われる必要がある.
ウイルスの進化を理解することは,将来のアウトブレイクとワクチンの有効性を予測する鍵です.

研究の目的:

1968年から2003年にかけてのインフルエンザA (H3N2) の抗原進化を定量化・視覚化する.
抗原的および遺伝的進化パターンを比較する.
ワクチンの有効性を監視し,新興株を予測するための方法を開発する.

主な方法:

インフルエンザA (H3N2) 株における抗原漂移と遺伝子変異の分析.
進化の軌道の定量化と視覚化.
免疫脱出とウイルスフィットネス効果の推定.

主要な成果:

抗原と遺伝的進化の間に強い相関が観察されました.
抗原的進化は,遺伝的進化と比較して,より断続的なパターンを示した.
特定の遺伝的変化は,抗原性に対して不釣り合いの大きな影響を及ぼした.

結論:

この研究は,抗原進化とワクチンの有効性をモニタリングするための方法を提供します.
このアプローチは,新興インフルエンザ株の成功を予測するのに役立ちます.
遺伝子と抗原の進化の相互作用を理解することは,インフルエンザのコントロールにとって極めて重要です.

さらに関連する動画

07:06

Prediction of HIV-1 Coreceptor Usage (Tropism) by Sequence Analysis using a Genotypic Approach

Published on: December 1, 2011

07:38

Open-source Single-particle Analysis for Super-resolution Microscopy with VirusMapper

Published on: April 9, 2017

関連する概念動画

00:57

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.

00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...

01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...

01:28

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...

01:23

Investigation of Disease Outbreaks

Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...

01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...

関連する実験動画