Les acides nucléiques viraux sont-ils à l’intérieur ou à l’extérieur des cellules hôtes?

The first step in extracting viral nucleic acids is to isolate viral particles from a sample infected with the virus, and then purify nucleic acids (ADN ou ARN) from these viral particles. Viral nucleic acids are present inside viral particles, while viral particles can be present inside or outside the cells, which depends on the stage of the viral life cycle.

Extracellular viral particles

During the infection process, viruses can replicate and assemble into mature viral particles inside host cells. Once mature, these viral particles are released by cell lysis or budding and distributed in body fluids, secretions or the environment.

Extracellular viral particles contain intact viral nucleic acids, which can be released from viral particles by physical and chemical methods for subsequent purification and analysis.

Intracellular viral particles

In the early stages of the viral life cycle, viral nucleic acids may exist directly in the cytoplasm or nucleus, participating in the replication and transcription of the viral genome.

If the goal is to extract intracellular viral nucleic acids, the host cell membrane needs to be destroyed first to release the viral particles, and then the nucleic acids can be extracted from these viral particles.

Basic steps for viral nucleic acid extraction

Traitement des échantillons: lyse cells to release viral particles.

Precipitation or concentration of viral particles: use centrifugation or other methods to separate viral particles from the sample.

Lysis of viral particles: use chemical reagents to destroy the protein capsid of the virus and release nucleic acids.

Nucleic acid purification: éliminer les protéines, lipids and other impurities to purify high-purity viral nucleic acids.

Nucleic acid quantification and quality assessment: use ultraviolet spectroscopy or fluorescence quantification and other techniques to quantify the extracted nucleic acids.

In actual laboratory operations, whether it is intracellular or extracellular viral nucleic acid extraction, similar lysis, purification and protection measures are used to ensure the quality and integrity of the nucleic acids. Cependant, the specific operational details and pretreatment steps need to be adjusted according to the different sources of nucleic acids.

Présentation du fournisseur

Société de biotechnologie Shanghai Lingjun., Ltd.a été établi en 2016 qui est un fabricant professionnel de matériaux biomagnétiques et de réactifs d'extraction d'acide nucléique.

Nous avons une riche expérience dans l'isolement et la purification des acides nucléiques, purification des protéines, séparation cellulaire, chimiluminescence et autres domaines techniques.

Nos produits sont largement utilisés dans de nombreux domaines, comme les tests médicaux, tests génétiques, recherche universitaire, sélection génétique, etc.. Nous fournissons non seulement des produits, mais pouvons également entreprendre des OEM, ODM, et autres besoins. Si vous avez des besoins connexes, n'hésitez pas à nous contacter ausales01@lingjunbio.com.