In order to develop novel, effective therapies for central nervous system regeneration, it is essential to better understand the role of neurotrophic factors and to design, accordingly, better artificial scaffolds to support both neurite outgrowth and synapse formation. Both nerve growth factor and brain-derived neurotrophic factor are major factors in neural survival, development, synaptogenesis, and synaptic connectivity of primary cultured neurons. As a prime candidate coating material for such neural cultures, carbon nanotubes offer unique structural, mechanical, and electrical properties. In this study, carbon nanotubes coated glass-coverslips were used as the matrix of a primary neural culture system used to investigate the effects of carbon nanotubes on neurite outgrowth and nerve growth factor/brain-derived neurotrophic factor release and expression. For these purposes, we performed comparative analyses of primary cultured neurons on carbon nanotubes coated, non-coated, and Matrigel-coated coverslips. The morphological findings showed definite carbon nanotubes effects on the neurite outgrowths and synaptogenic figures in both cortical and hippocampal neurons when compared with the non-coated negative control. Although the carbon nanotubes did not change neurotrophin expression levels, it stimulated brain-derived neurotrophic factor release into the media from both types of neurons. Accordingly, we suggest a different mechanism of action between carbon nanotubes and Matrigel in relation to the specific neurotrophic factors. Since carbon nanotubes supply long-term extracellular molecular cues for the survival and neurite outgrowths of cultured neurons, the results from this study will contribute to an understanding of carbon nanotubes biological effects and provide new insight into their role in the secretion of neurotrophic factors.

Kim YG, et al. Exp Neurobiol. 2012 Jun;21(2):61-67. http://dx.doi.org/10.5607/en.2012.21.2.61

Pyeon HJ, et al. Anat Cell Biol. 2012 Jun;45(2):97-102. http://dx.doi.org/10.5115/acb.2012.45.2.97

Lee JE, et al. J Korean Med Sci. 2022 Dec;38(1):e15. https://doi.org/10.3346/jkms.2023.38.e15

Inflammatory eyelid symptoms are common in primary care and there have been several reports on Demodex blepharitis. In the present study, we evaluate the 9 patients with Demodex blepharitis, who showed inflammation of the eyelids, dry eye, and cylindrical dandruff at the base of the eyelashes. The causative species from all patients was Demodex folliculorum of either the adult or nymph stage. Two patients had recurrent chalazion and 3 patients had keratitis. Weekly lid scrubs with 50% tee tree oil were performed for 6 weeks. After treatment, the symptoms of blepharitis and keratitis had improved in all patients. This case report provides clinical reference source for the proper treatment of ocular demodicosis.

This study aimed to identify and compare central post-traumatic stress disorder (PTSD) symptoms experienced by rape and sexual harassment victims, and the differences between the 2 groups. This study included 935 female victims of sexual violence who visited Sunflower Center in Korea between 2014 and 2020. Of the 935 victims, 172 were rape victims and 763 were sexually harassed. The Korean version of the Post-traumatic Diagnosis Scale was used to evaluate PTSD symptoms, and network analysis was performed to examine the differences in symptoms. The central symptom was “Physical reactions (PDS05)” for the group of rape victims and Less interest in activities (PDS09)’ for the group of sexual harassment victims. For the group of sexual harassment victims, the most distinct central edge was the one between “Being over alert (PDS16)” and “Being jumpy or easily startled (PDS17),” and for the group of rape victims, it was the edge between “Upset when reminded of the trauma (PDS04),” and “Physical reactions (PDS05).” Network analysis revealed differences in central PTSD symptoms and central edges between sexual harassment and rape victims. Although re-experiencing and avoidance symptom clusters were most central in both groups, the specific central symptoms and edges differed between the 2 groups.