Nixa Sedes, MD
@nixassedes.bsky.social
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MD Internal Medicine Specialist Avid reader Science and Technology Philosophy History Astronomy Archaeology and Paleontology lover Proud mother of one
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Reposted by Nixa Sedes, MD
aga-gastro.bsky.social
Review examines pharmacomicrobiomics and the role of the #GutMicrobiome in immunomodulation and cancer therapy. Read the full article here: ow.ly/34GO50X7evW
Reposted by Nixa Sedes, MD
jama.com
JAMA @jama.com · 18h
Diverticulitis results in approximately 200 000 hospitalizations annually in the US, with an estimated health care expenditure of more than $6.3 billion annually. This Review summarizes the pathogenesis, diagnosis, and treatment of diverticulitis.

ja.ma/4q0P9pC
Diagram titled: "Figure 1. Pathophysiology, Progression, and Complications of Acute Diverticulitis", contrasting uncomplicated and complicated diverticulitis with labelled anatomical drawings and related clinical information.
Reposted by Nixa Sedes, MD
stemcellreports.bsky.social
RNA-seq study maps iPSC-derived motor neurons with C9orf72, FUS, TARDBP or SOD1 mutations. Reveals early synaptic dysfunction & RBP dysregulation in ALS gene mutations. A key resource for #ALS pathogenesis. https://ow.ly/tAnL50X5ToH

ISSCR | The Gairdner Foundation | SickKids Foundation
Reposted by Nixa Sedes, MD
sigtrans-sttt.bsky.social
Granulocyte CSF3 mediates idiopathic #PulmonaryFibrosis by regulating TGF-β, while neutralizing CSF3 mitigates #Fibrosis by inhibiting TGF-β signaling, deactivating myofibroblasts, and restoring the ECM and #CellularHomeostasis. #medsky

#STTT #OpenAccess: doi.org/10.1038/s413...
Reposted by Nixa Sedes, MD
easoobesity.bsky.social
Semaglutide or tirzepatide should be the first-line pharmacological treatment for people living with obesity and most of its complications, according to our new framework for the pharmacological treatment of obesity and its complications @natmed.nature.com

easo.org/semaglutide-...
Reposted by Nixa Sedes, MD
acr-journals.bsky.social
Arthritis Care & Research - October Issue Editor's Pick

👉 Metabolic Consequences of Rheumatoid Arthritis
doi.org/10.1002/acr....

Review examines current understanding of mechanisms underlying disruptions in metabolic pathways in RA, their clinical effects, & how treatment affects these changes
Arthritis Care & Research Editor's Pick banner - October 2025 issue cover
nixassedes.bsky.social
Evaluating the Enantioselective Neurotoxicity of Organophosphorus Pollutant Dioxabenzofos: Mechanistic Studies Employing Cellular, Molecular, and Computational Toxicology Assays🔓 | ACS Omega pubs.acs.org/doi/10.1021/...
Evaluating the Enantioselective Neurotoxicity of Organophosphorus Pollutant Dioxabenzofos: Mechanistic Studies Employing Cellular, Molecular, and Computational Toxicology Assays
Chiral organophosphorus pollutants are widely distributed in different environmental matrices, but their health risks to humans remain insufficiently explored. This study explored the acetylcholinesterase (AChE)-mediated enantioselective neurotoxicity of dioxabenzofos on SH-SY5Y cells and elucidated the microscopic mechanisms underlying neurotoxicity at the enantiomeric level. Cellular assays exhibited that dioxabenzofos displayed significant enantioselectivity in inhibiting the intracellular AChE activity, with IC50 values of 17.2 μM and 5.28 μM, respectively, reflecting differences in bioaffinity between both enantiomers and intracellular AChE. Modes of neurotoxic action suggest that the different orientations of enantiomers enable them to form conjugated interactions and substantial hydrogen bonds with key residues, while inherent conformational dynamics and flexibility enhance the bioaffinity of (S)-dioxabenzofos toward AChE. Energy decomposition results indicated that the binding free energy (−15.43 kcal mol–1) of (R)-dioxabenzofos to AChE was larger than that of (S)-dioxabenzofos (−23.55 kcal mol–1), and key residues such as Trp-86, Tyr-124, Ser-203, Tyr-337, and His-447 at the active site were found to contribute differently to the enantioselective neurotoxic effects. Clearly, these findings provide mechanistic insights into assessing the neurotoxicity risks associated with human exposure to chiral dioxabenzofos.
pubs.acs.org
nixassedes.bsky.social
Diagnostic and Monitoring Strategies for VEXAS Syndrome: Evaluating Sanger Sequencing, NGS, and the SWIM-Score🔓
link.springer.com/article/10.1...
Diagnostic and Monitoring Strategies for VEXAS Syndrome: Evaluating Sanger Sequencing, NGS, and the SWIM-Score - Journal of Clinical Immunology
VEXAS syndrome is an adult-onset autoinflammatory disorder caused by somatic UBA1 variants, but there are no standardized criteria for genetic testing or diagnostics. This study compared Sanger sequencing and next-generation sequencing (NGS) for detecting UBA1 variants in patients with suspected VEXAS, assessed the ability of Sanger sequencing to estimate variant allele fractions (VAFs), and evaluated the Maeda et al. scoring system for selecting patients for genetic testing in a primary cohort and a validation cohort. In the primary cohort of 104 patients, Sanger sequencing identified VEXAS variants in 12%, with no additional cases detected by NGS. Sanger sequencing accurately quantified VAFs ranging from 0.1 to 0.9. In a small longitudinal subset (n = 3), VAFs in blood correlated with CRP levels, increased over time despite various treatments, but decreased in two patients after initiation of Azacitidine treatment. The novel parameters, VAF in myeloid cells and VEXAS cell concentration, showed promise as exploratory markers for patient monitoring. The Maeda-score, requiring a threshold score of 2 for 100% sensitivity, exhibited low specificity—29% in the primary cohort and 41% in the validation cohort (n = 62, with 2 carrying VEXAS variants). In contrast, the simplified SWIM-score—based on Skin involvement, Weight loss, Inflammation, and Macrocytic anemia—achieved 100% sensitivity in both cohorts, with higher specificities of 47% and 65%, respectively. In conclusion, Sanger sequencing reliably detected UBA1 variants and quantified VAFs. Monitoring VAF and VEXAS cell concentration may track disease progression, and the SWIM-score demonstrated potential for accurately selecting patients for UBA1 testing.
link.springer.com