Mechanistic investigation and further optimization of the aqueous Glaser-Hay bioconjugation.

The Glaser-Hay bioconjugation has recently emerged as an efficient and attractive method to generate stable, useful bioconjugates with numerous applications, specifically in the field of therapeutics. Herein, we investigate the mechanism of the aqueous Glaser-Hay coupling to better understand optimization strategies. In doing so, it was identified that catalase is able to minimize protein oxidation and improve coupling efficiency, suggesting that hydrogen peroxide is produced during the aqueous Glaser-Hay bioconjugation. Further, several new ligands were investigated to minimize protein oxidation and maximize coupling efficiency. Finally, two novel strategies to streamline the Glaser-Hay bioconjugation and eliminate the need for secondary purification have been developed.

Retrospective Analysis of Burn Injuries in Children with Autism Spectrum Disorder.

Children with neurodevelopmental disorders are at risk for burn injury, but the clinical outcomes, particularly mortality, are unknown in this patient population in the United States (U.S.). The main objectives of this study are to evaluate (1) subject characteristics; (2) burn injury type; (3) clinical care provided; and (4) mortality in children with autism spectrum disorder (ASD), hypothesizing that this patient population has similar mortality and critical care management requirements when compared to children without ASD. This is a retrospective observational cohort study utilizing the TriNetX ® electronic health record database of subjects aged 0 to 18 years with burn injury associated diagnostic codes. Data were analyzed for demographics, diagnostic, medication, procedural codes, and mortality. We analyzed 99,323 subjects (n, %) coded for a burn injury [3083 (3.1%) with ASD and 96,240 (96.9%) without ASD]. Children with ASD had a higher odds of 1-year all-cause mortality [1.9 (1.06, 3.40), p = 0.004], need for critical care services [1.88 (1.40, 2.52), p < 0.001], and mechanical ventilation [2.69 (1.74, 4.17), p < 0.001] compared to those without. Our study found that U.S. children with ASD who had a burn injury had a higher odds of mortality and critical care needs when compared to children without ASD. Future studies are needed to understand the impact of burn injuries and factors associated with mortality in this patient population.

Retrospective Analysis of Dog Bite Injuries in Children with Autism Spectrum Disorder.

PURPOSE: Children with autism spectrum disorder (ASD) may suffer a dog bite injury, but the frequency and its clinical impact is unknown. We sought to evaluate the (1) subject characteristics; (2) injury type; (3) clinical care provided; and (4) mortality in children with ASD who suffer a dog bite injury. We hypothesized that children with ASD have higher mortality and require more clinical care than children without ASD. METHODS: This is a retrospective observational cohort study utilizing the TriNetX ® EHR database of subjects aged 0 to 18 years with dog bite diagnostic codes. Data were analyzed for demographics, diagnostic, medication, procedural codes, and mortality. RESULTS: We analyzed 38,337 subjects (n, %) coded for a dog bite injury [619 (1.6%) with ASD and 37718 (98.4%) without ASD]. Children with ASD had a higher odds of a traumatic injury to the head [1.34 (1.15, 1.57), p < 0.0001] compared to those without. There was no difference in critical care services, hospitalization, mechanical ventilation, and rabies vaccine administration. All-cause mortality at 1 year was low with no deaths reported within the ASD cohort and 37 (0.1%) deaths reported within the no ASD cohort. CONCLUSIONS: Children with ASD that suffer dog bite injuries have similar clinical needs to children without ASD but are more likely to suffer a traumatic injury to the head. Future studies are needed to better understand inciting factors for injuries in this population.

Effects of Structural Variations on Antibacterial Properties for Conjugated Diynes Generated through Glaser Hay Couplings.

Antibiotic resistance is a growing problem facing global societies today. Many new antibiotics are derivatized versions of already existing antibiotics, which allows for antibiotic resistance to arise. To combat this issue, new antibiotics with different core structures need to be elucidated. Asymmetrical polyacetylenes have been isolated from natural products and they have previously been demonstrated to exhibit antimicrobial and antibacterial activity; however, their synthetic preparation has not made them easily amenable to rapid derivatization for SAR studies. Using a combination of solution and solid-supported chemistries, an array of diynes inspired by a known natural product were prepared and assessed for antibacterial activity. Ultimately, several compounds were identified with improved activity in bacterial viability assays. Moreover, some compounds were discovered that displayed a degree of specificity for E. coli over P. fluorescens and vice versa. These new compounds show promise, and further investigation is needed to pinpoint the specific structural components that elicit biological activity.