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Scientia Pharmaceutica

Scientia Pharmaceutica is an international, peer-reviewed, open access journal related to the pharmaceutical sciences, published quarterly online. 
It is the official journal of the Austrian Pharmaceutical Society (ÖPhG). Society members receive discounts on the article processing charges.

All Articles (1,585)

Virtual Screening Targeting LasR and Elastase of Pseudomonas aeruginosa Followed by In Vitro Antibacterial Evaluation

  • Nerlis Pájaro-Castro,
  • Paulina Valenzuela-Hormazábal and
  • David Ramírez
  • + 3 authors

Pseudomonas aeruginosa is a Gram-negative pathogen with a remarkable capacity to acquire multiple resistance mechanisms, severely limiting current therapeutic options. Consequently, the identification of new antimicrobial agents remains a critical priority. In this study, an integrated in silico-guided strategy was applied to identify small molecules with antibacterial potential against P. aeruginosa, targeting the quorum-sensing regulator LasR (PDB ID: 2UV0) and elastase (PDB ID: 1U4G). Pharmacophore modeling was performed for both targets, followed by ligand-based virtual screening, structure-based virtual screening (SBVS), and MM-GBSA (Molecular Mechanics-Generalized Born Surface Area) binding free energy calculations. Top-ranked compounds based on predicted binding affinity were selected for in vitro cytotoxicity and antibacterial evaluation. Antimicrobial activity was assessed against three P. aeruginosa strains: an American Type Culture Collection (ATCC) reference strain, a clinically susceptible isolate, and an extensively drug-resistant (XDR) clinical isolate. SBVS yielded docking scores ranging from −6.96 to −12.256 kcal/mol, with MM-GBSA binding free energies between −18.554 and −88.00 kcal/mol. Minimum inhibitory concentration (MIC) assays revealed that MolPort-001-974-907, MolPort-002-099-073, MolPort-008-336-135, and MolPort-008-339-179 exhibited MIC values of 62.5 µg/mL against the ATCC strain, indicating weak-to-moderate antibacterial activity consistent with early-stage hit compounds. MolPort-008-336-135 showed the most favorable activity against the clinically susceptible isolate, with an MIC of 62.5 µg/mL, while maintaining HepG2 cell viability above 70% at this concentration and an half-maximal inhibitory concentration (IC50) greater than 500 µg/mL. In contrast, all tested compounds displayed MIC values above 62.5 µg/mL against the XDR isolate, reflecting limited efficacy against highly resistant strains. Overall, these results demonstrate the utility of in silico-driven approaches for the identification of antibacterial hit compounds targeting LasR and elastase, while highlighting the need for structure–activity relationship optimization to improve potency, selectivity, and activity against multidrug-resistant P. aeruginosa.

4 February 2026

Pharmacophores for the active molecules Las R (a) and elastase (b). Three-feature (AAD) and five-feature (AHHRR) pharmacophore models generated with Phase illustrating the acceptor group (A1 and A2; pink), donor group (D4; blue), hydrophobic group (H5 and H7; green) and aromatic ring (R8; orange). This model was created using known inhibitors of the transcriptional activator LasR (PDB code: 2UV0) and elastase (PDB ID: 1U4G).
  • Communication
  • Open Access

Pharmacological modulators of CFTR have significantly changed the cystic fibrosis (CF) phenotype of subjects affected by this multi-organ disease. Here, we evaluated the CFTR function analysis (short-circuit chamber in colonoids) in response to Elexacaftor/Tezacaftor/Ivacaftor (ETI) with the clinical benefits of in vivo treatment with ETI in ten CF subjects. We found that the functional response of ETI-corrected PDROS significantly correlated with the absolute change in the sweat chloride test. Thus, our work reinforces the use of organoid-derived human intestinal monolayers to guide clinicians in selecting CFTR-targeted therapies.

4 February 2026

Ex vivo drug response by short-circuit current (Isc) measurements of indicated colonoids under CFTR therapy and vehicle (DMSO; dimethyl sulfoxide). Values are means ± SE * p-value ≤ 0.05, ** p-value ≤ 0.005, **** p-value < 0.0001. Unpaired Student’s t-test. The genotype of each CF subject reported here is as follows: S1:W57G/A234D; S2:R74W+V201M+D1270N/CFTRdele22-24; S3: F508del/711+5A; S4: A559T/A559T; S5: R347P/R347P; S6: L227R/L227R; S7: F508del/dup.exon1-3; S8: R1162X/3849+10kBC>T; S9: 2183AA>G/N1303K; S10: R553X/2789+5G>A; and S11: CF patients harboring F508del/F508del (used here as reference). Each dot represents a single electrophysiological measurement. A minimum of three measurements were performed for each condition and genotype.

Alzheimer’s disease and related neurodegenerative disorders are associated with progressive cognitive decline, primarily driven by cholinergic dysfunction and impaired synaptic signaling. Hericium erinaceus, also known as lion’s mane mushroom, has been reported to promote neuronal differentiation and synaptic plasticity. In this study, a standardized H. erinaceus extract powder (HEP) was prepared from fruiting bodies and quantified using hericene A as a marker compound. The neuroprotective effects of HEP were then evaluated in both cellular and animal models of scopolamine-induced cognitive dysfunction. Pretreatment of SH-SY5Y human neuroblastoma cells with HEP (5–25 μg/mL) significantly improved cell viability and reduced scopolamine-induced apoptosis, while enhancing the activation of neuroplasticity-related signaling proteins, including brain-derived neurotrophic factor (BDNF), cAMP response element-binding protein (CREB), and extracellular signal-regulated kinase (ERK). In vivo, oral administration of HEP (300 mg/kg) to scopolamine-treated ICR mice markedly improved cognitive performance, increasing the recognition index to 63.8% compared with 41.6% in the scopolamine group, and enhancing spontaneous alternation in the Y-maze test to 59.6%. These cognitive improvements were accompanied by preserved hippocampal neuronal structure and increased BDNF immunoreactivity. Additionally, HEP improved cholinergic function by restoring serum acetylcholine levels and reducing acetylcholinesterase activity. Collectively, these findings suggest that standardized HEP exerts neuroprotective and cognition-enhancing effects via modulation of cholinergic markers and activation of BDNF-mediated neuroplasticity, highlighting its potential as a functional food ingredient or nutraceutical for preventing cognitive decline related to cholinergic dysfunction.

23 January 2026

Schematic diagram of the experimental plan.

This study reports the exclusive and rapid synthesis of twenty-four derivatives of 1-((mono/bis)trifluoromethyl)phenyl-3-(4-arylthiazol-2-yl)thioureas (series 7, 9 and 11), along with their antimicrobial activities against Candida albicans, Mycobacterium smegmatis and seven additional bacterial strains. The anticancer potential of these compounds was evaluated against various human cancer cell lines, including A549 (lung adenocarcinoma), HeLa (cervical carcinoma), IMR32 (neuroblastoma), MCF-7 (breast adenocarcinoma), HCT116 (colon cancer) and DU145 (prostate cancer). Among these, 1-(3,5-bistrifluoromethylphenyl)-3-(thiazol-2-yl)thiourea (7i) and 1-(4-trifluoromethylphenyl)-3-(4-(3-chlorophenyl)thiazol-2-yl)thiourea (11h) demonstrated significant antimicrobial activity against M. luteus, S. aureus, S. aureus 1 and C. albicans. Additionally, 1-(4-(3-chlorophenyl)thiazol-2-yl)-3-(3-trifluoromethylphenyl)thiourea (9g) and 1-(4-trifluoromethylphenyl)-3-(4-(2-fluorophenyl)thiazol-2-yl)thiourea (11g) showed activity against Mycobacterium smegmatis. The bioassay tests indicated that many of the thiourea derivatives exhibited moderate activity against the A549, HeLa, MCF-7 and HCT116 cancer cell lines.

19 January 2026

Structures of biologically active thioureas (1–3).

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Antitumor Activity of Natural Products and Related Compounds
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Antitumor Activity of Natural Products and Related Compounds

Editors: Barbara De Filippis, Alessandra Ammazzalorso, Marialuigia Fantacuzzi

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Sci. Pharm. - ISSN 2218-0532