Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет
Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/1
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- Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Iodine-Based Coordination Compounds: A Strategy Toward Antibiotic Potentiation(Multidisciplinary Digital Publishing Institute, 2026-05-12) ;Daniil Shepilov ;Dana A. Askarova ;Anar Seisembekova; Ardak B. JumagaziyevaDue to the increasing threat of antibiotic resistance and the emergence of new pathogenic strains, the development of effective combined therapeutic agents represents a crucial direction in the fight against infections. Within this study, several compounds were synthesized in which iodine is present in a coordination complex with antibiotics—sodium sulfadimidine and gentamicin sulfate. The physicochemical parameters of these compounds were investigated using capillary electrophoresis and UV spectroscopy, along with their cytotoxicity, antimicrobial, and antiviral activities. As a result of this work, two stable compounds, KC-246 and KC-248, were synthesized, demonstrating virus-inhibitory activity against herpes simplex virus and influenza A under extremely low cytotoxicity levels of 0.018–0.106 mg/mL. Additionally, they exhibited antimicrobial activity against representatives of the families Staphylococcaceae, Pseudomonadaceae, Enterobacteriaceae, Enterococcaceae, and yeast-like fungi. The minimum bactericidal concentrations (MBCs) ranged from 0.794 µg/mL to 0.198 µg/mL (KC-246) and from 2.093 µg/mL to 0.523 µg/mL (KC-248).Цитирования (OpenAlex) 2 - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, D/PVA/I-1 as an Antibiotic Adjuvant: In Vitro Synergy and Membrane Permeabilization in MDR Bacteria(Multidisciplinary Digital Publishing Institute, 2026-08-17) ;Ardak B. Jumagaziyeva; ;Anar Seisembekova ;Daniil ShepilovZhanar A. IskakbayevaBackground: Antimicrobial resistance (AMR) is among the most pressing challenges in modern infectious medicine, driving progressive failure of standard antibacterial therapy and rising mortality from infections caused by multidrug-resistant (MDR) pathogens. Antibiotic potentiation through adjuvant compounds capable of restoring the activity of existing drugs represents a promising strategy to overcome resistance without developing fundamentally new antibacterial molecules. This study aimed to evaluate the antibiotic-potentiating activity of a dextrin/polyvinyl alcohol/iodine complex (D/PVA/I-1), developed at the Scientific Center for Anti-Infectious Drugs JSC (Almaty, Kazakhstan), against clinically relevant MDR reference strains. Methods: Nine reference strains, Staphylococcus aureus (ATCC 33591, BAA-39), Escherichia coli (ATCC BAA-196, BAA-2523), Klebsiella pneumoniae (ATCC BAA-2524, 700603), Acinetobacter baumannii (ATCC BAA-1790), Streptococcus pneumoniae (ATCC BAA-660), and Haemophilus influenzae (ATCC 33930), and two clinical isolates, P. aeruginosa SCAID PHRX1-2019 and E. coli SCAID WND1-2021, were tested. Antibiotic-potentiating activity was assessed by checkerboard assay with calculation of the fractional inhibitory concentration index (FICI); bactericidal kinetics were evaluated by time-kill analysis. The effect of D/PVA/I-1 on cytoplasmic membrane permeability was investigated using a crystal violet uptake assay. Results: Of 45 D/PVA/I-1–antibiotic combinations tested across nine antibiotics, synergy (FICI ≤ 0.5) was demonstrated in 44.4% of cases, partial synergy in 48.9%, and additive effects in 6.7%; no antagonistic interactions were detected. The most pronounced potentiating effect occurred against Gram-positive pathogens, particularly MRSA strains (66.7% synergistic combinations). Time-kill analysis confirmed suppression of the regrowth phenotype characteristic of MDR strains under monotherapy and restoration of bactericidal activity against antibiotics to which strains exhibited intrinsic resistance. D/PVA/I-1 induced a dose- and time-dependent increase in membrane permeability in both Gram-positive and Gram-negative organisms. Conclusions: D/PVA/I-1 is an effective broad-spectrum antibiotic potentiator and represents a promising basis for combination therapy regimens against MDR infections.
