The genus Quercus: metabolites, biological activity and mechanisms of action

Quercus, an essential genus within the Fagaceae family, comprises roughly 500 plant species. Over the past 5 years (2019-2023), there has been a noticeable increase in the production of high-quality research papers focusing on this genus, marking it as an emerging research area of interest. However, despite this growing body of work, there has yet to be a comprehensive and systematic review addressing the metabolites, pharmacological effects, and underlying mechanisms associated with Quercus. To bridge this knowledge gap, the current study performed an exhaustive literature review. A total of 64 relevant papers published in high-impact journals (classified as JCR Q1-Q3) between January 2019 and April 2023 were meticulously selected through comprehensive searches of the ACS, PubMed, Web of Science, and Science Direct databases. The chemical analysis encompassed the identification of 217 compounds, spanning categories like terpenoids, flavonoids, tannins, and phenols, among others. Within this set, 11 previously undisclosed compounds emerged, comprising 6 terpenoids and 5 esters. The study primarily delved into the internal and external pharmacological properties of 23 distinct plant species, including antioxidant, antibacterial, anti-inflammatory, antidiabetic effects, and even the assessment of its potential for mitigating the impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This paper offers a comprehensive evaluation of the findings and provides insightful recommendations for guiding future research on this plant genus. The ultimate aim is to facilitate a solid foundation for the modern research and development of Quercus spp., thereby contributing to scientific advancement and enhancing the existing literature in this field.