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Pàgina inicial > Articles > Articles publicats > Hepatitis B Virus Variants with Multiple Insertions and/or Deletions in the X Open Reading Frame 3' End : |
Data: | 2022 |
Resum: | Deletions in the 3' end region of the hepatitis B virus (HBV) X open reading frame (HBX) may affect the core promoter (Cp) and have been frequently associated with hepatocellular carcinoma (HCC). The aim of this study was to investigate the presence of variants with deletions and/or insertions (Indels) in this region in the quasispecies of 50 chronic hepatitis B (CHB) patients without HCC. We identified 103 different Indels in 47 (94%) patients, in a median of 3. 4% of their reads (IQR, 1. 3-8. 4%), and 25% (IQR, 13. 1-40. 7%) of unique sequences identified in each quasispecies (haplotypes). Of those Indels, 101 (98. 1%) caused 44 different altered stop codons, the most commonly observed were at positions 128, 129, 135, and 362 (putative position). Moreover, 39 (37. 9%) Indels altered the TATA-like box (TA) sequences of Cp; the most commonly observed caused TA2 + TA3 fusion, creating a new putative canonical TATA box. Four (8%) patients developed negative clinical outcomes after a median follow-up of 9. 4 (8. 7-12) years. In conclusion, we observed variants with Indels in the HBX 3' end in the vast majority of our CHB patients, some of them encoding alternative versions of HBx with potential functional roles, and/or alterations in the regulation of transcription. |
Ajuts: | Instituto de Salud Carlos III PI18/01436 Instituto de Salud Carlos III PI19/00301 Ministerio de Economía y Competitividad IDI-20200297 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Hepatitis B virus ; Hepatitis B X open reading frame ; HBX 3' end region ; Insertions ; Deletions ; Quasispecies ; Next-generation sequencing |
Publicat a: | Biomedicines, Vol. 10, Issue 5 (May 2022) , art. 1194, ISSN 2227-9059 |
18 p, 1.0 MB |