RESUMO
A novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of coronavirus disease 2019 (COVID-19) and continues to be a global health challenge. To understand viral disease biology, we have carried out proteo-genomic analysis using next-generation sequencing (NGS) and mass spectrometry on nasopharyngeal swabs of COVID-19 patients to examine the clinical genome and proteome. Our study confirms the mutability of SARS-CoV-2 showing multiple single-nucleotide polymorphisms. NGS analysis detected 27 mutations, of which 14 are synonymous, 11 are missense, and 2 are extragenic in nature. Phylogenetic analysis of SARS-CoV-2 isolates indicated their close relation to a Bangladesh isolate and multiple origins of isolates within the country. Our proteomic analysis, for the first time, identified 13 different SARS-CoV-2 proteins from the clinical swabs. Of the total 41 peptides captured by high-resolution mass spectrometry, 8 matched to nucleocapsid protein, 2 to ORF9b, and 1 to spike glycoprotein and ORF3a, with remaining peptides mapping to ORF1ab polyprotein. Additionally, host proteome analysis revealed several key host proteins to be uniquely expressed in COVID-19 patients. Pathway analysis of these proteins points toward modulation in immune response, especially involving neutrophil and IL-12-mediated signaling. Besides revealing the aspects of host-virus pathogenesis, our study opens new avenues to develop better diagnostic markers and therapeutic approaches.
Assuntos
COVID-19/virologia , Polimorfismo de Nucleotídeo Único , SARS-CoV-2/genética , Proteínas do Nucleocapsídeo de Coronavírus/genética , Genoma Viral , Genômica , Sequenciamento de Nucleotídeos em Larga Escala , Interações entre Hospedeiro e Microrganismos/genética , Interações entre Hospedeiro e Microrganismos/fisiologia , Humanos , Mutação , Pandemias , Fosfoproteínas/genética , Filogenia , Poliproteínas/genética , Proteoma , Proteômica , SARS-CoV-2/patogenicidade , SARS-CoV-2/fisiologia , Glicoproteína da Espícula de Coronavírus/genética , Proteínas Virais/genética , Proteínas Viroporinas/genéticaRESUMO
The tooth, the pulp tissue within it and its supporting structures should be viewed as one biologic unit. The interrelationship of these structures influences each other during health, function and disease. The interrelationship between periodontal and endodontic diseases has aroused much speculation, confusion and controversy. The endodontium and periodontiumare closely related and disease or damage of one tissue may lead to the involvement of the other.
