4 research outputs found
New Class of Phosphine Oxide Donor-Based Supramolecular Coordination Complexes from an in Situ Phosphine Oxidation Reaction or Phosphine Oxide Ligands
A one-pot,
multicomponent, coordination-driven self-assembly approach was used
to synthesize the first examples of neutral bridging phosphine oxide
donor-based supramolecular coordination complexes. The complexes were
self-assembled from a <i>fac</i>-ReÂ(CO)<sub>3</sub> acceptor,
an anionic bridging O donor, and a neutral soft phosphine or hard
phosphine oxide donor
New Class of Phosphine Oxide Donor-Based Supramolecular Coordination Complexes from an in Situ Phosphine Oxidation Reaction or Phosphine Oxide Ligands
A one-pot,
multicomponent, coordination-driven self-assembly approach was used
to synthesize the first examples of neutral bridging phosphine oxide
donor-based supramolecular coordination complexes. The complexes were
self-assembled from a <i>fac</i>-ReÂ(CO)<sub>3</sub> acceptor,
an anionic bridging O donor, and a neutral soft phosphine or hard
phosphine oxide donor
NMR Spectroscopy-based Metabolomics of <i>Drosophila</i> Model of Huntington’s Disease Suggests Altered Cell Energetics
Huntington’s
disease (HD) is a neurodegenerative disorder
induced by aggregation of the pathological form of Huntingtin protein
that has expanded polyglutamine (polyQ) repeats. In the <i>Drosophila</i> model, for instance, expression of transgenes with polyQ repeats
induces HD-like pathologies, progressively correlating with the increasing
lengths of these repeats. Previous studies on both animal models and
clinical samples have revealed metabolite imbalances during HD progression.
To further explore the physiological processes linked to metabolite
imbalances during HD, we have investigated the 1D <sup>1</sup>H NMR
spectroscopy-based metabolomics profile of <i>Drosophila</i> HD model. Using multivariate analysis (PCA and PLS-DA) of metabolites
obtained from methanolic extracts of fly heads displaying retinal
deformations due to polyQ overexpression, we show that the metabolite
imbalance during HD is likely to affect cell energetics. Six out of
the 35 metabolites analyzed, namely, nicotinamide adenine dinucleotide
(NAD), lactate, pyruvate, succinate, sarcosine, and acetoin, displayed
segregation with progressive severity of HD. Specifically, HD progression
was seen to be associated with reduction in NAD and increase in lactate-to-pyruvate
ratio. Furthermore, comparative analysis of fly HD metabolome with
those of mouse HD model and HD human patients revealed comparable
metabolite imbalances, suggesting altered cellular energy homeostasis.
These findings thus raise the possibility of therapeutic interventions
for HD via modulation of cellular energetics
Calmidazolium Chloride and Its Complex with Serum Albumin Prevent Huntingtin Exon1 Aggregation
Huntington’s
disease (HD) is a genetic disorder caused by
a CAG expansion mutation in <i>Huntingtin</i> gene leading
to polyglutamine (polyQ) expansion in the N-terminus side of Huntingtin
(Httex1) protein. Neurodegeneration in HD is linked to aggregates
formed by Httex1 bearing an expanded polyQ. Initiation and elongation
steps of Httex1 aggregation are potential target steps for the discovery
of therapeutic molecules for HD, which is currently untreatable. Here
we report Httex1 aggregation inhibition by calmidazolium chloride
(CLC) by acting on the initial aggregation event. Because it is hydrophobic,
CLC was adsorbed to the vial surface and could not sustain an inhibition
effect for a longer duration. The use of bovine serum albumin (BSA)
prevented CLC adsorption by forming a BSA–CLC complex. This
complex showed improved Httex1 aggregation inhibition by interacting
with the aggregation initiator, the NT<sub>17</sub> part of Httex1.
Furthermore, biocompatible CLC-loaded BSA nanoparticles were made
which reduced the polyQ aggregates in HD-150Q cells