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Emina Korić

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Introduction: Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by joint inflammation and destruction, leading to significant pain and disability. Adenosine deaminase (ADA) is identified as a biomarker for RA’s inflammatory process. This study aims to investigate the potential of flavonoids and phenolic acids to inhibit ADA activity (in silico) and evaluate their anti-inflammatory effects in a RA model (in vivo). Methods: The molecular docking study was conducted using YASARA Structure 19.12.14. software following the Auto Dock 4.2 protocol. A rat model with pristane-induced arthritis was used to test the anti-inflammatory effect of selected polyphenols. The consistency of the development of the rat model was evaluated through the following indicators artistic score, paw volume, and body weight. Quercetin was administered intragastrically at doses of 150 and 400 mg/kg over 15 days. The C-reactive protein (CRP) level in serum was measured with an automatic biochemical analyzer. Statistical analyses were performed using SPSS 29.0.2.0. Results: Molecular docking simulations showed flavonoids inhibited ADA activity with inhibition constants ranging from 0.012 mM to 0.190 mM. In the in vivo RA model, quercetin significantly reduced joint inflammation and serum CRP levels at a higher dose of 400 mg/kg. Conclusion: Quercetin shows promise as an anti-inflammatory agent for RA by targeting ADA, suggesting that flavonoid-rich plant extracts could enhance RA treatment.

Triterpenes are very important secondary metabolites with wide structural diversity and significant role in pharmacy and medicine.In the present research, a comparative study of pharamacological activities of the triterpene fractions obtained from several plant species belonging to Lamiaceae family, was carried out. In-vitro anti-proliferative activity was performed using a standardproliferation assay based on tetrazolium salts. In vitro anti-inflammatory activity of triterpene fractions was determined by an assay of inhibition of albumin denaturation. In general, the triterpene fractions obtained from plant species belonging to Lamiaceae family showed a strong anti-proliferative activity and anti-inflammatory activity.The triterpene fraction of Rosmarini folium showed the strongest anti-proliferative activity (GI50range from 4 to 37 μg/ml) and the strongest anti-inflammatory activity in the range from 57.27% to 80.69%. This comparative study provides scientific evidence to support the traditional use of Lamiacae plant species for medical purposes as anti-inflammatory and anti-proliferative medicines.

In the present study, we investigated the antiproliferative activity of essential oil from leaves of Melissa officinalis L. grown in Southern Bosnia and Herzegovina. In vitro evaluation of antiproliferative activity of the M. officinalis essential oil was carried out on three human tumor cell lines: MCF-7, NCI-H460 and MOLT-4 by MTT assay. M. officinalis essential oil was characterized by high percentage of monoterpenes (77,5%), followed by the sesquiterpene fraction (14,5%) and aliphatic compounds (2,2%). The main constituents of the essential oil of M. officinalis are citral (47,2%), caryophyllene oxide (10,2%), citronellal (5,4%), geraniol (6,6%), geranyl acetate (4,1%) and βcaryophyllene (3,8%). The essential oil showed significant antiproliferative activity against three cancer cell lines, MOLT-4, MCF-7, and NCI-H460 cells, with GI50 values of <5, 6±2 and 31±17 μg/mL, respectively. The results revealed that M. officinalis L. essential oil has a potential as anticancer therapeutic agent.

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