COVID-19 vaccination: science, politics and public health

First High-Resolution Crystal Structures of DNA:2′-O-Methyl-RNA Heteroduplexes

Heteroduplexes composed of all-DNA and all-2′-OMe RNA strands do not occur in nature, but they have found application in the development of molecular beacons and could also be used as aptamers or elements of nucleic acid-based nanostructures that will contain such structural motifs. The crystallization experiments performed have shown that the introduction of overhangs at the ends of the duplex has a great influence on the success of crystallization, as well as on the DNA:2′-OMe-RNA heteroduplex crystal packing. The molecular and crystal structure of the DNA:2′-O-methyl-RNA heteroduplex in its overhanging and blunt-ended versions was determined at 100 K using synchrotron radiation with a resolution of 1.91 and 1.55 Å, respectively. The Zn-SAD method was used to resolve the original duplex structure when molecular replacement by many existing models of duplex structures failed. Both molecules analyzed adopted a conformation close to the A-RNA double helix. The presented structures provide the first insight into this type of heteroduplexes and allowed a comparative analysis with existing nucleic acid homo- and heteroduplex structures. The results of our research expand the knowledge of the structural properties of new heteroduplexes and may be useful for future applications, such as therapies using this class of compounds.

COVID-19 VACCINATION AND DENTISTRY: ARE WE FACING NEW CHALLENGES OR WORKING WITHIN OUR POSSIBILITIES? ANALYTICAL REVIEW

Objective. To systematize available data regarding COVID-19 vaccination aspects among dental specialists and highlight relevant occupationally-related features of vaccination challenges. Materials and Methods. Search of pertinent literature sources associated with above-formulated objective was provided via PubMed Central database (https://www.ncbi.nlm.nih.gov/) and Google Scholar search engine (https://scholar.google.com/). Criteria of publication date included 2020-2021 years period. Publications in English or at least with English abstract/summary were collected within primary sample for further preliminary content-analysis. All articles collected for in-depth content-analysis were evaluated due to the text-mining, text-identification and text-extraction principles with further clusterization and systematization of outcomes at the Microsoft Excel 2019 software (Microsoft Office, 2019). Results. After full reading of articles’ texts 24 of them were interpreted as those containing new and/or unique information, interpretations or facts, out of which 9 were cross-sectional online surveys, 4 were editorials, 6 were literature/clinical reviews, 1 was brief report, 1 was opinion article, 1 was ethical moment, 1 was advice article, and 1 was web-source. New challenges related with COVID-19 vaccination within dental filed are represented by personal hesitancy of dental professionals and students, which in turn associated with provided information support, previous COVID-19 experience, fear of getting infected or transmit disease to the patients or family members, fear of potential development for post-vaccination side-effects, changes of occupational status, and interaction within dental team. Conclusions. Further improvement of dental care field possible only after vaccination of dental professionals. Vaccination of dentists widening window of their possibilities regarding potential role of dental specialist as members of COVID-19 vaccine’s delivery team, improvement of quality of life among dental patients (after its decreasing changes during pandemic), and providing dentists with important role in so-called “behaviorally informed strategies” and public motivational programs aimed at amplification of positive willingness for COVID-19 vaccination among general public.

A Perspective: Integrating Dental and Medical Research Improves Overall Health

The past decade has seen marked increases in research findings identifying oral-systemic links. Yet, much of dental research remains poorly integrated with mainstream biomedical research. The historic separation of dentistry from medicine has led to siloed approaches in education, research and practice, ultimately depriving patients, providers, and policy makers of findings that could benefit overall health and well-being. These omissions amount to lost opportunities for risk assessment, diagnosis, early intervention and prevention of disease, increasing cost and contributing to a fragmented and inefficient healthcare delivery system. This perspective provides examples where fostering interprofessional research collaborations has advanced scientific understanding and yielded clinical benefits. In contrast are examples where failure to include dental research findings has limited progress and led to adverse health outcomes. The impetus to overcome the dental-medical research divide gains further urgency today in light of the coronavirus pandemic where contributions that dental research can make to understanding the pathophysiology of the SARS-CoV-2 virus and in diagnosing and preventing infection are described. Eliminating the research divide will require collaborative and trans-disciplinary research to ensure incorporation of dental research findings in broad areas of biomedical research. Enhanced communication, including interoperable dental/medical electronic health records and educational efforts will be needed so that the public, health care providers, researchers, professional schools, organizations, and policymakers can fully utilize oral health scientific information to meet the overall health needs of the public.