Zika virus (ZIKV) is involved in the etiology of serious nervous system pathologies. Currently, there are no specific and effective vaccines or antiviral drugs to prevent the diseases caused by ZIKV. This study aimed to assess the activity of flavonoids present in crude hydroethanolic extract (CHE) and fractions obtained from B. holophylla leaves against ZIKV. O-glycosylated flavonoids were characterized by high-performance liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS/MS). The cytotoxic concentration and the effective concentration for 50% of the cells (CC₅₀ and EC₅₀, respectively) were determined, and the selectivity index (SI) was calculated. Molecular networks were constructed based on the chemical composition of the samples and global antiviral activity data using the Global Natural Products Social Molecular Networking (GNPS) platform. Protein–ligand docking was performed in the NS2B-NS3 protease, NS3 helicase, and NS5 methyltransferase of the ZIKV. CHE showed greater antiviral activity at a multiplicity of infection (MOI) of 1.0, with an EC₅₀ of 11.93 µg/mL, SI = 13.38, and reduced cytopathic effects. Molecular networks indicated that O-glycosylated flavonoids are responsible for the activity against ZIKV, being quercetin-O-deoxyhexoside more selective and effective. Molecular docking confirmed the inhibitory activity of quercetin-O-deoxyhexoside, which showed an affinity for the tested targets, especially for NS2B-NS3 protease. The results showed that B. holophylla has flavonoids with potential for future therapeutic applications against ZIKV.

Bixin is a lipophilic apocarotenoid abundant in the aril of Bixa orellana L. seeds. Widely used as a natural colorant in food, textile, and cosmetic industries, its pharmacological potential remains underexplored. This study aimed to extract and purify bixin, characterize its physicochemical properties, develop and validate an HPLC method for quantification, and evaluate its antifungal activity, cytotoxicity, and selectivity in vitro. Extraction was performed by Soxhlet using hexane and chloroform, followed by recrystallization in acetone. Characterization (TG/DTA, FTIR, and ¹H NMR) confirmed predominance of the 9'-cis isomer. The HPLC method (λ=470 nm) was validated per ICH Q2-(R2), showing specificity, linearity (R² = 0.9993), low LOD/LOQ (0.638 and 1.934 μg mL^-1), and high precision and accuracy (RSD < 2%; recovery 99.4-100.8%). Antifungal assays against eight Candida strains revealed moderate activity, with MICs from 2 to 256 μg mL^-1. The best results were observed for C. glabrata and C. tropicalis (MIC = 2 and 4 μg mL^-1). Bixin also inhibited virulence factors inC. albicans Cytotoxicity on Vero cells showed a CC₅₀ of 30.71 μg mL^-1, with selectivity indices of 15.36 and 7.68 forC. glabrata andC. tropicalis, respectively. These results support bixin's potential as a natural antifungal agent.

Background Monkeypox is a global public health issue caused by the monkeypox virus (MPXV), a virus belonging to the Orthopoxvirus genus. As of October 28 2022, a total of 77,115 laboratory-confirmed cases and 3,610 probable cases, including 36 deaths, were reported, with 9,070 cases reported in Brazil, the second most affected country. The need to develop national technologies for the rapid diagnosis of emerging diseases for mass testing of the population is evident, as observed in the current SARS-CoV-2 pandemic. With that in mind, this article provides an overview of current methods, techniques, and their applications in the molecular detection of monkeypox. Methods The relevant documents or papers covered in this study were selected by a search in international bibliographic databases. The search terms used in the databases were aimed at summarizing existing knowledge on molecular diagnostic methods, such as: monkeypox; MPX, MPXV, qPCR, PCR, PCR-ELISA, and Diagnosis and Detection searched separately or together using the Boolean operator “AND” either in the title or The searches took place in September 2022, and the corresponding articles were selected between 2012 and 2022. Results We found 256 documents in total and twelve studies addressing the molecular diagnosis of monkeypox were classified as possible sources for this review. Conclusion This paper presents new perspectives and an overview of current methods, technologies, and applications in the molecular diagnosis of monkeypox. It is evident there is a pressing need to develop national technologies for the rapid diagnosis of emerging diseases for mass testing of the population. It is extremely important to have national detection kits with greater diagnostic capacity to assist in developing effective public policies in countries affected by this disease.