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Question

Paulo Henrique dos Santos Bento replied to the topic "Impact of NS5A on oxidative stress and oncogenic pathways"

Publication: The role of the NS5A protein of the hepatitis C virus (HCV) in cellular signaling pathways associated with hepatocellular carcinoma in the presence of oxidative stress

Congratulations for your work, it's very interesting! I'm currently studying the NS5 protein in gliomas, so I found your study extremely relevant and engaging. I have two questions about your work: First, how might the upregulation of GRB2 by NS5A contribute to the establishment of a pro-oncogenic microenvironment in hepatocytes? And given that NS5A expression protected cells from H2O2-induced loss of viability, what additional experiments would you propose to clarify whether this protective effect is mediated primarily through oxidative stress modulation or through alterations in survival signaling pathways?
Question

Letícia Santiago da Silva Ferreira replied to the topic "Questions"

Publication: Decoding the epigenetic response to early stress: SLC6A4 methylation trajectories in preterm newborns

Thanks for your amazing talk and results! I have some questions, as follows: 1) Given the temporal changes in CpG methylation you observed, have you assessed whether these epigenetic modifications also happen at the transcriptional or protein level of SLC6A4 to establish functional consequences beyond methylation signatures? In addition, did you explore whether the CpG-specific methylation differences cluster within known transcription factor binding sites or regulatory motifs of the SLC6A4 promoter, and could these site-specific changes differentially impact serotonin transporter regulation? 2) How do you distinguished methylation changes due to prematurity itself from those potentially driven by external perinatal stressors (e.g., oxygen therapy, corticosteroids, NICU handling, maternal stress), and have you controlled for these in your analyses? 3) From a translational perspective, do you envision that SLC6A4 methylation profiling at birth could serve as a biomarker for identifying preterm infants at higher risk of later neurodevelopmental disorders, and what are the ethical implications of early-life epigenetic risk stratification in neonatology? Thanks and congrats again!