4 research outputs found
Cyclodextrin-Adamantane Host–Guest Interactions on the Surface of Biocompatible Adamantyl-Modified Glycodendrimers
A series of adamantyl-modified glycodendrimers
(<b>mPPI-Gx-AdaA-C</b>) was prepared in a two-step synthesis
using two efficient reactions:
(1) urea bond formation from amine and isocyanate and (2) reductive
amination. <sup>1</sup>H NMR spectroscopy (host guest titration and
ROESY experiments) was used to evaluate the graded effect of steric
hindrance as a function of the number and type of oligosaccharide
molecules and of the number of adamantyl (Ada) units on the complexation
with monomeric β-cyclodextrin (β-CD). Glycosylated fourth
generation PPIs showing an average substitution in adamantyl groups
of 13% were found to interact with β-CD effectively, and were
considered as candidates for further complexation studies with a polymeric
cyclodextrin derivative (<i>poly-</i>β-CD). The host–guest
interaction features of the maltosylated dense shell glycodendrimer
along with the low cytotoxicity provided the rational basis for the
use of these adamantyl-functionalized glycodendrimers in the design
of supramolecular systems potentially useful as healthcare materials
Development of Imidazole-Reactive Molecules Leading to a New Aggregation-Induced Emission Fluorophore Based on the Cinnamic Scaffold
In order to obtain new fluorophores
potentially useful in imidazole
labeling and subsequent conjugation, a small series of Morita–Baylis–Hillman
acetates (<b>3a–c</b>) was designed, synthesized, and
reacted with imidazole. The optical properties of the corresponding
imidazole derivatives <b>4a–c</b> were analyzed both
in solution and in the solid state. Although the solutions display
a very weak emission, the powders show a blue emission, particularly
enhanced in the case of compound <b>4c</b> possessing two methoxy
groups in the cinnamic scaffold. The photophysical study confirmed
the hypothesis that the molecular rigidity of the solid state enhances
the emission properties of these compounds by triggering the restriction
of intramolecular motions, paving the way for their applications in
fluorogenic labeling
Additional file 1: Figure S1. of 18F-VC701-PET and MRI in the in vivo neuroinflammation assessment of a mouse model of multiple sclerosis
PET and MRI images of EAE mice at 14 days p.i. In vivo PET and MRI representative images of three of the four EAE mice used for the in vivo imaging evaluation at 14 days post-immunization. The fourth animal is shown in Fig. 6. A) 18F-VC701 PET and MRI co-registered coronal images of Mouse 1 (clinical score at acute phase 2.5 and 0 at late stage); B) 18F-VC701 PET and MRI co-registered coronal images of Mouse 2 (clinical score 2 at 14 d.p.i. and 2.5 at 28 d.p.i.); C) 18F-VC701 PET and MRI co-registered coronal images of Mouse 3 (clinical score 1.5 in acute phase and 0 at late stage of the disease). (DOCX 41 kb
Novel Analgesic/Anti-Inflammatory Agents: 1,5-Diarylpyrrole Nitrooxyalkyl Ethers and Related Compounds as Cyclooxygenase‑2 Inhibiting Nitric Oxide Donors
A series of 3-substituted 1,5-diarylpyrroles
bearing a nitrooxyalkyl
side chain linked to different spacers were designed. New classes
of pyrrole-derived nitrooxyalkyl inverse esters, carbonates, and ethers
(<b>7</b>–<b>10</b>) as COX-2 selective inhibitors
and NO donors were synthesized and are herein reported. By taking
into account the metabolic conversion of nitrooxyalkyl ethers (<b>9</b>, <b>10</b>) into corresponding alcohols, derivatives <b>17</b> and <b>18</b> were also studied. Nitrooxy derivatives
showed NO-dependent vasorelaxing properties, while most of the compounds
proved to be very potent and selective COX-2 inhibitors in in vitro
experimental models. Further in vivo studies on compounds <b>9a</b>,<b>c</b> and <b>17a</b> highlighted good anti-inflammatory
and antinociceptive activities. Compound <b>9c</b> was able
to inhibit glycosaminoglycan (GAG) release induced by interleukin-1β
(IL-1β), showing cartilage protective properties. Finally, molecular
modeling and <sup>1</sup>H- and <sup>13</sup>C-NMR studies performed
on compounds <b>6c</b>,<b>d</b>, <b>9c</b>, and <b>10b</b> allowed the right conformation of nitrooxyalkyl ester
and ether side chain of these molecules within the COX-2 active site
to be assessed