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Question

Tainá Miotto de Souza replied to the topic "Questions"

Publication: DNA methylation profile in pediatric patients with germ cell tumors

Thanks for your amazing talk and results! I have some questions, as follows: 1) Did you identify subtype-specific methylation patterns (e.g., yolk sac vs dysgerminoma vs immature teratoma), and if so, do these overlap with known methylation “imprints” in primordial germ cell development or pluripotency pathways? 2) Since resistance to cisplatin is a major clinical issue, have you explored whether methylation changes in DNA repair genes (e.g., MGMT, MLH1, or other repair-associated promoters) correlate with high-risk or resistant cases in your cohort? 3) Considering the reliance on tumor markers and histopathology in GCT diagnosis, do you envision that DNA methylation profiling could be translated into a minimally invasive diagnostic approach (for instance, via circulating tumor DNA methylation in plasma) and how would you address challenges of sensitivity and specificity in children? Thanks and congrats again!
Question

Tainá Miotto de Souza replied to the topic "Implications of DNA methylation in tumor biology"

Publication: DNA methylation profile in pediatric patients with germ cell tumors

Congratulations on your work, it's so complex and well-developed! I work with gliomas, which are brain tumors, and there's much discussion about methylation changes. Some gliomas even present a hypermethylator profile, so this is a very promising study. I just have two questions regarding your work: 1. Your methylation data from 13 pediatric GCT samples are very interesting. Considering the small sample size and tumor heterogeneity, have you thought about ways to validate whether these patterns are consistent across a larger patient population or other tumor subtypes? 2. Have you considered complementing this with RNA-seq or proteomics to explore how these methylation changes might influence gene expression or tumor behavior? Again, congrats for your project!
Question

Anna Gabriele Prado dos Santos replied to the topic "Questions"

Publication: CIRSIMARIN MODULATES A549 LUNG CANCER CELL MIGRATION IN 2D AND 3D CULTURES VIA TRANSCRIPTIONAL REGULATION OF METALLOPROTEINASES

Thanks for your amazing talk and results! I have some questions, as follows: 1) You demonstrated the downregulation of MMP2/9/11 transcripts after cirsimarin exposure, so I wonder if these transcript changes translate into reduced proteolytic activity in the extracellular milieu, for instance, and have you measured their active vs. pro-forms (e.g., by zymography or activity assays)? 2) There is a notable difference in effective concentrations between your 2D (1–40 μM) and 3D (160 μM) assays. How do you interpret this in terms of compound diffusion, binding to ECM components, local aggregation/solubility, or compound stability within spheroids? 3) Which upstream signalling pathways do you hypothesize link cirsimarin to MMP transcriptional repression — for example, FAK/ERK, NF-κB, or TGF-β/EMT regulators?