0000000001036410
AUTHOR
M. Cusimano
Fragments of β-thymosin from the sea urchin Paracentrotus lividus as potential antimicrobial peptides against staphylococcal biofilms.
The immune mediators in echinoderms can be a potential source of novel antimicrobial peptides (AMPs) applied toward controlling pathogenic staphylococcal biofilms that are intrinsically resistant to conventional antibiotics. The peptide fraction5 kDa from the cytosol of coelomocytes of the sea urchin Paracentrotus lividus (5-CC) was tested against a group of Gram-positive and Gram-negative pathogen reference strains. The 5-CC of P. lividus was active against all planktonic-tested strains but also showed antibiofilm properties against staphylococcal strains. Additionally, we demonstrated the presence of three small peptides in the 5-CC belonging to segment 9-41 of a P. lividusβ-thymosin. The…
Pirrolomicine che inibiscono la Sortasi A nelle infezioni sostenute da batteri Gram-positivi
La Sortasi A è un enzima di membrana responsabile dell’ancoraggio delle proteine di superficie sulla parete cellulare dei batteri Gram-positivi. Essa è considerata un interessante obiettivo per lo sviluppo di nuovi farmaci anti-infettivi che mirino ad interferire con importanti meccanismi di virulenza Gram-positivi. In un precedente lavoro abbiamo indagato sull’attività antistafilococcica e antibiofilm di alcune Pirrolomicine naturali e sintetiche, composti pirrolici polialogenati attivi su patogeni Gram-positivi, alle concentrazioni di 1.5 e 0.045 µg/mL. I risultati biologici hanno mostrato percentuali di inibizione di biofilm comprese tra 50-80% [1]. Allo scopo di indagare sul loro meccan…
Synthesis and antirpoliferative activity of isoxazolo[3,4-d]pyridazin-7(6H)-one derivatives
3,4-diphenylisoxazolo[3,4-d]pyridazin-7(6H)-one analogs were synthesized and tested for the antiproliferative activity. Study on the cell cycle alteration and on some cellular target (ATM, procaspase-2 proteins and H2AX histone) demonstrate the increase of the cell population in S phase and to induce cellular death by apoptosis by DNA damage with double strand breaks.