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相关概念视频

Viral Structure00:56

Viral Structure

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Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Retroviruses02:33

Retroviruses

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Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
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Retrovirus Life Cycles01:10

Retrovirus Life Cycles

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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Intralumenal Vesicles and Multivesicular Bodies01:38

Intralumenal Vesicles and Multivesicular Bodies

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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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What are Viruses?00:50

What are Viruses?

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Overview
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Glycocalyx and its Functions01:14

Glycocalyx and its Functions

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The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.
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相关实验视频

Updated: Jun 4, 2025

Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay
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Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay

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[携带HIV-1 Env的病毒样颗粒,具有调节的糖组成]

G A Kaevitser1, E I Samokhvalov1, D V Scheblyakov1

  • 1Gamaleya Federal Research Center of Epidemiology and Microbiology, Moscow, 123098 Russia.

Molekuliarnaia biologiia
|December 22, 2024
PubMed
概括

这项研究使用重组疫苗病毒设计了高度免疫的人类免疫缺陷病毒1型 (HIV-1) Env-VLP. 这种方法增强了对HIV-1的抗体诱导,克服了自然抵抗力和丰富的糖化挑战.

关键词:
在CHO细胞中.这是一个敌人.艾滋病病毒-1 艾滋病病毒-1这就是VLP的VLP.糖甘油的使用方法葡萄糖蛋白是一种葡萄糖蛋白质.再组合疫苗病毒的疫苗.

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Detection of Neutralization-sensitive Epitopes in Antigens Displayed on Virus-Like Particle VLP-Based Vaccines Using a Capture Assay
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相关实验视频

Last Updated: Jun 4, 2025

Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay
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Detection of Neutralization-sensitive Epitopes in Antigens Displayed on Virus-Like Particle VLP-Based Vaccines Using a Capture Assay
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科学领域:

  • 病毒学 病毒学
  • 免疫学 免疫学 免疫学
  • 生物技术是生物技术.

背景情况:

  • 艾滋病毒-1表面Env蛋白因其低合率和难以接近的表位因抗体中和而具有天然抵抗力.
  • 之前的方法产生了高度免疫的Env-VLP (病毒样颗粒) 来克服这种抗性.

研究的目的:

  • 用重组疫苗病毒 (rVVs) 来修改ZM53(T/F) 菌株的Envtrimers,以产生Env-VLP.
  • 优化VLP的生产和调节糖成分,以增强免疫性和克服HIV-1耐药性.

主要方法:

  • 使用表达Env,Gag-Pol (HIV-1/SIV) 和牛病毒hr基因的rVV产生Env-VLP.
  • 利用CHO Lec1工程细胞系缺乏GlcNAc-TI用于VLP生成,结合具有细胞质 (CT) 域的Env蛋白.
  • 修改了Env蛋白质构成和甘氨酸成分,以改善VLP特性.

主要成果:

  • 通过使用CHO Lec1细胞系和rVVs的修饰Env蛋白成功生成了Env-VLP.
  • 证明了调节甘氨酸组成和Env蛋白质构成的能力.
  • 建立了一个优化Env-VLP生产的平台,以增强免疫性.

结论:

  • 工程Env-VLP在克服HIV-1对抗体诱导的自然抵抗方面表现有前途.
  • 开发的技术允许对VLP特性进行调制,这可能导致更有效的HIV-1疫苗.
  • 这种方法提供了一种策略,通过解决糖化和表位素可访问性来完善HIV-1疫苗设计.