1
|
Senderskiy IV, Dolgikh VV, Ismatullaeva DA, Mirzakhodjaev BA, Nikitina AP, Pankratov DL. Treatment of Microsporidium Nosema bombycis Spores with the New Antiseptic M250 Helps to Avoid Bacterial and Fungal Contamination of Infected Cultures without Affecting Parasite Polar Tube Extrusion. Microorganisms 2024; 12:154. [PMID: 38257981 PMCID: PMC10819227 DOI: 10.3390/microorganisms12010154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024] Open
Abstract
Microsporidia are a group of widespread eukaryotic spore-forming intracellular parasites of great economic and scientific importance. Since microsporidia cannot be cultured outside of a host cell, the search for new antimicrosporidian drugs requires an effective antiseptic to sterilize microsporidian spores to infect cell lines. Here, we show that a new polyhexamethylene guanidine derivative M250, which is active against fungi and bacteria at a concentration of 0.5-1 mg/L, is more than 1000 times less effective against spores of the microsporidium Nosema bombycis, a highly virulent pathogen of the silkworm Bombyx mori (LC50 is 0.173%). Treatment of N. bombycis spores that were isolated non-sterilely from silkworm caterpillars with 0.1% M250 solution does not reduce the rate of spore polar tube extrusion. However, it completely prevents contamination of the Sf-900 III cell culture medium by microorganisms in the presence of antibiotics. The addition of untreated spores to the medium results in contamination, whether antibiotics are present or not. Since 0.1% M250 does not affect spore discharging, this compound may be promising for preventing bacterial and fungal contamination of microsporidia-infected cell cultures.
Collapse
Affiliation(s)
- Igor V. Senderskiy
- All-Russian Institute of Plant Protection, Podbelsky Chausse 3, 196608 Saint-Petersburg, Russia;
| | - Viacheslav V. Dolgikh
- All-Russian Institute of Plant Protection, Podbelsky Chausse 3, 196608 Saint-Petersburg, Russia;
| | - Diloram A. Ismatullaeva
- Scientific Research Institute of Sericulture, Ipakchi Str. 1, Tashkent 100069, Uzbekistan; (D.A.I.); (B.A.M.)
| | - Bakhtiyar A. Mirzakhodjaev
- Scientific Research Institute of Sericulture, Ipakchi Str. 1, Tashkent 100069, Uzbekistan; (D.A.I.); (B.A.M.)
| | - Anastasiia P. Nikitina
- Department of Microbiology and Virology, Pavlov First Saint-Petersburg State Medical University, L’vaTolstogo Str. 6-8, 197022 Saint-Petersburg, Russia; (A.P.N.); (D.L.P.)
| | - Danil L. Pankratov
- Department of Microbiology and Virology, Pavlov First Saint-Petersburg State Medical University, L’vaTolstogo Str. 6-8, 197022 Saint-Petersburg, Russia; (A.P.N.); (D.L.P.)
| |
Collapse
|
2
|
Li K, Li M, Zhong H, Tang L, Lv Y, Fan Z. Design and Synthesis of Pyrimidine Amine Containing Isothiazole Coumarins for Fungal Control. ACS OMEGA 2023; 8:37471-37481. [PMID: 37841179 PMCID: PMC10568580 DOI: 10.1021/acsomega.3c05734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/13/2023] [Indexed: 10/17/2023]
Abstract
Developing new fungicides is always crucial to protecting crops. A series of 4-(3,4-dichloroisothiazol-5-yl)-7-(2-((5-(5-pyrimidin-4-yl)amino)ethoxy)-8-methyl) coumarin derivatives were designed and synthesized by Williamson ether condensation and substitution reactions. Structure determinations were clarified by 1H NMR, 13C NMR, and HRMS, and compound 4h crystallized by the fusion method for further structural confirmation. The in vitro bioassay results showed that the target compounds displayed good fungicidal activity against Alternaria solani, Botrytis cinerea, Cercospora arachidicola, Fusarium graminearum, Physalospora piricola, Rhizoctonia solani, and Sclerotinia sclerotiorum. Among them, compounds 4b and 4d showed higher inhibitory activity against R. solani, with EC50 values of 11.3 and 13.7 μg/mL, respectively, and they were more active than the positive control diflumetorim with an EC50 value of 19.8 μg/mL. Molecular docking suggested that compound 4b and diflumetorim may have similar interactions with complex I NADH oxidoreductase. Density functional theory calculation and pesticide-likeness analysis studies gave a rational explanation of their fungicidal activity. These results indicated that compounds 4b and 4d deserved further optimization according to the principle of pesticide-likeness.
Collapse
Affiliation(s)
- Kun Li
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers
Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Mengyuan Li
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers
Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Haolin Zhong
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers
Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Liangfu Tang
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers
Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - You Lv
- College
of Agricultural and Biological Engineering, Heze University, Heze 274015, P. R. China
| | - Zhijin Fan
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
- Frontiers
Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| |
Collapse
|