Design, synthesis and biological assessment of novel N-substituted 3-(phthalimidin-2-yl)-2,6-dioxopiperidines and 3-substituted 2,6-dioxopiperidines for TNF-α inhibitory activity

Eight novel 2-(2,6-dioxopiperidin-3-yl)phthalimidine EM-12 dithiocarbamates 9 and 10, N-substituted 3-(phthalimidin-2-yl)-2,6-dioxopiperidines 11-14 and 3-substituted 2,6-dioxopiperidines 16 and 18 were synthesized as tumor necrosis factor-α (TNF-α) synthesis inhibitors. Synthesis involved utilization of a novel condensation approach, a one-pot reaction involving addition, iminium rearrangement and elimination, to generate the phthalimidine ring required for the creation of compounds 9-14. Agents were, thereafter, quantitatively assessed for their ability to suppress the synthesis on TNF-α in a lipopolysaccharide (LPS)-challenged mouse macrophage-like cellular screen, utilizing cultured RAW 264.7 cells. Whereas compounds 9, 14 and 16 exhibited potent TNF-α lowering activity, reducing TNF-α by up to 48% at 30 μM, compounds 12, 17 and 18 presented moderate TNF-α inhibitory action. The TNF-α lowering properties of these analogs proved more potent than that of revlimid (3) and thalidomide (1). In particular, N-dithiophthalimidomethyl-3-(phthalimidin-2-yl)-2,6-dioxopiperidine 14 not only possessed the greatest potency of the analogs to reduce TNF-α synthesis, but achieved this with minor cellular toxicity at 30 μM. The pharmacological focus of the presented compounds is towards the development of well-tolerated agents to ameliorate the neuroinflammation, that is, commonly associated with neurodegenerative disorders, epitomized by Alzheimer's disease and Parkinson's disease

Exendin-4 Ameliorates Motor Neuron Degeneration in Cellular and Animal Models of Amyotrophic Lateral Sclerosis

Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease characterized by a progressive loss of lower motor neurons in the spinal cord. The incretin hormone, glucagon-like peptide-1 (GLP-1), facilitates insulin signaling, and the long acting GLP-1 receptor agonist exendin-4 (Ex-4) is currently used as an anti-diabetic drug. GLP-1 receptors are widely expressed in the brain and spinal cord, and our prior studies have shown that Ex-4 is neuroprotective in several neurodegenerative disease rodent models, including stroke, Parkinson's disease and Alzheimer's disease. Here we hypothesized that Ex-4 may provide neuroprotective activity in ALS, and hence characterized Ex-4 actions in both cell culture (NSC-19 neuroblastoma cells) and in vivo (SOD1 G93A mutant mice) models of ALS. Ex-4 proved to be neurotrophic in NSC-19 cells, elevating choline acetyltransferase (ChAT) activity, as well as neuroprotective, protecting cells from hydrogen peroxide-induced oxidative stress and staurosporine-induced apoptosis. Additionally, in both wild-type SOD1 and mutant SOD1 (G37R) stably transfected NSC-19 cell lines, Ex-4 protected against trophic factor withdrawal-induced toxicity. To assess in vivo translation, SOD1 mutant mice were administered vehicle or Ex-4 at 6-weeks of age onwards to end-stage disease via subcutaneous osmotic pump to provide steady-state infusion. ALS mice treated with Ex-4 showed improved glucose tolerance and normalization of behavior, as assessed by running wheel, compared to control ALS mice. Furthermore, Ex-4 treatment attenuated neuronal cell death in the lumbar spinal cord; immunohistochemical analysis demonstrated the rescue of neuronal markers, such as ChAT, associated with motor neurons. Together, our results suggest that GLP-1 receptor agonists warrant further evaluation to assess whether their neuroprotective potential is of therapeutic relevance in ALS

Evaluation of eLearning outcomes- experience from an online Psychotherapy education programme

SEPTIMUS is a one-year Europe-wide postgraduate theoretical course for psychotherapists and counselors provided entirely via the internet. It may be used as part of a training course, with face to face elements provided locally, or for continuing professional development. The course was developed at the University of Sheffield in collaboration with psychotherapy training institute partners in seven other European countries. Two studies involving 167 SEPTIMUS students and 60 comparable face-to-face students were undertaken. Study 1- Drop-out rates for the SEPTIMUS programme were found to be low, and comparison between those dropping out and those completing did not highlight any significant factors linked to distance learning. However, students cited Finance, Distance from training centre, Lack of practical experience, Family commitments and the Intensity of their working weeks as having been barriers to taking face-to-face learning courses in the past. Study 2- SEPTIMUS students (eLearners) were compared with students taking comparable attending (face-to-face) theoretical courses also being provided by partners in the project to psychotherapy trainees. Significant differences were found in Distance from training institute and Ability to visit training institute. SEPTIMUS students had higher levels of Computer ownership, Frequency of internet use and IT skills than attenders; these factors when examined in study 1 did not have an impact on the drop-out rate of eLearners. eLearning can overcome barriers to traditional learning in psychotherapy, particularly distance from a training centre, without loss of student satisfaction or student performance. Factors sometimes thought to be obstacles to eLearning, such as IT skills, were not found to be significant barriers, although may have affected recruitment. Certain aspects of eLearning, such as the tendency to facilitate self-disclosure, were found to be very beneficial particularly in the context of psychotherapy programmes

User Acceptance of Mobile Technology: A Campus-Wide Implementation of Blackboard's Mobile™ Learn Application

Mobile learning is a fast growing trend in higher education. This study examined how an extended technology acceptance model (TAM) could evaluate and predict the use of a mobile application in learning. A path analysis design was used to measure the mediating effects on the use of Blackboard\u27s Mobile TM Learn application in coursework (N = 77). The results indicate that the hypothesized model was a strong fit, x2(8, N = 77) = 6.84, p = 0.55. Perceived resources, perceived ease of use, perceived usefulness, and attitude were found to be significant determinants of users\u27 acceptance of mobile application technology. The findings of this research have implications for educational leaders, mobile application designers, course instructors, and instructional technologists who want to understand why students adopt mobile learning, how to devise practical methods for integrating mobile applications into curriculum, and ways to evaluate of the acceptance and usability of the mobile learning systems