Publications by authors named "M Nigra"

Article Synopsis
  • The study investigated the impact of switching to a less neurotoxic antiretroviral therapy (ARV) on neurocognitive performance in people living with HIV who have cognitive impairments.
  • Participants were randomly assigned to either continue their current treatment or switch to a less harmful ARV regimen (MARAND-X) for 24 weeks, with results measured using various cognitive tests and electroencephalography.
  • While the overall neurocognitive scores improved modestly, significant improvements were only seen in specific memory functions for those in the MARAND-X group with better CNS penetration, indicating that the effectiveness of ARVs in the central nervous system may influence cognitive health.
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The prevalence of neurocognitive impairment in people living with HIV is estimated between 30 and 50%. The pathogenesis of HIV-associated neurocognitive disorders is complex and multifactorial. Aim of the study was to measure the change in CSF biomarkers, Fibroscan and IMT measurements in PLWH with HAND randomized to a less neurotoxic regimen, or continuing their treatment.

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Plasma C-X-C-motif chemokine ligand-13 (CXCL13) has been linked to disease progression and mortality in people living with HIV (PLWH) and is a candidate target for immune-based strategies for HIV cure. Its role in central nervous system (CNS) of PLWH has not been detailed. We described CSF CXCL13 levels and its potential associations with neurological outcomes.

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Article Synopsis
  • The study investigates the challenges of electronic tuning in heterogeneous catalysis when using organic ligands that strongly bind to catalyst surfaces, specifically focusing on gold nanoparticles under 2 nm in size.
  • Gold nanoparticles are synthesized using two types of ligands: triphenylphosphine (TPP), which donates electrons, and triphenylmethyl mercaptan (TPMT), which withdraws electrons, highlighting differences in catalytic activity.
  • Experiments show that TPP-bound nanoparticles are active for all tested reactions, while TPMT-bound ones lose activity for resazurin reduction, demonstrating how the choice of ligands can influence the catalytic behavior of gold nanoparticles.
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Ammonia is an energy-dense liquid hydrogen carrier and fuel whose accessible dissociation chemistries offer promising alternatives to hydrogen electrolysis, compression and dispensing at scale. Catalytic ammonia reforming has thus emerged as an area of renewed focus within the ammonia and hydrogen energy research & development communities. However, a majority of studies emphasize the discovery of new catalytic materials and their evaluation under idealized laboratory conditions.

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