Investigation of 3D-printed chitosan-xanthan gum patches

In this study, using a new polymer combination of Chitosan(CH)/Xanthan Gum(XG) has been exhibited for wound dressing implementation by the 3D-Printing method, which was fabricated due to its biocompatible, biodegradable, improved mechanical strength, low degradation rate, and hydrophilic nature to develop cell-mimicking, cell adhesion, proliferation, and differentiation. Different concentrations of XG were added to the CH solution as 0.25, 0.50, 0.75, 1, and 2 wt% respectively in the formic acid/distilled water (1.5:8.5) solution and rheologically characterized to evaluate their printability. The results demonstrated that high mechanical strength, hydrophilic properties, and slow degradation rate were observed with the presence and increment of XG concentration within the 3D-Printed patches. Moreover, in vitro cell culture research was conducted by seeding NIH 3T3 fibroblast cells on the patches, proving the cell proliferation rate, viability, and adhesion. Finally, 1% XG and 4% CH containing 3D-Printed patches were great potential for wound dressing applications

The relationship between DIRAS1 gene and idiopathic generalized epilepsy in the Turkish population

Idiopathic generalized epilepsy (IGE) is a type of epilepsy with a monogenic or polygenic inheritance pattern representing 47% of all epilepsies. Idiopathic epilepsies have a complex genetic structure and the genetic factors involved in the development of epilepsy are still unclear. Dog models are often used in researching the complex genetic basis of epilepsy. A study of Rhodesian Ridgeback (RR) dogs with generalized myoclonic epilepsy found a 4-bp-deletion in the second exon of the DIRAS1 gene. In the literature, there is no study on the presence of a relationship between DIRAS1 gene and epilepsy in human population. We aimed to analyze whether there is a relationship between human epilepsy and DIRAS1 gene. For genomic analysis, peripheral blood samples were taken from 109 patients diagnosed with IGE and 51 healthy volunteers in the Turkish population. Genomic DNA isolation was performed from blood samples and the DIRAS1 gene region of the genomic DNA was amplified by Polymerase Chain Reaction (PCR). PCR products were purified and sequenced. DNA sequencing results were analyzed by chi-squared test. In the patient and control groups, G/C change was found in nucleotide 549 of DIRAS1 gene. No significant correlation was found between the distribution of DIRAS1-549-G/C genotypes and allele frequencies (p = 0.8 and p = 0.7, respectively). In this study, DIRAS1-549-G/C polymorphism has been shown not to play an important role in the development of epilepsy in the Turkish population. As a result, new data on IGEs whose molecular mechanism is still not fully elucidated has been revealed