Equisetin, an N-methylserine-derived acyl tetramic acid isolated from the terrestrial fungus Fusarium equiseti NRRL 5537, functions as a Quorum-sensing inhibitor (QSI) that specifically attenuates QS-regulated virulence phenotypes in P. aeruginosa, presenting a potent lead for treating P. aeruginosa infections without hindering bacterial growth. This tetramate-containing natural product possesses antibiotic and cytotoxic properties, effectively inhibiting the growth of Gram-positive bacteria and HIV-1 integrase activity, yet it does not impact Gram-negative bacteria.
Limonin glucoside is a natural product in citrus fruits. It inhibits expression of HIV-1 and HTLV-1 in infected cells, induces apoptosis in colon adenocarcinoma cells, and exhibits larvicidal activity against species of Aedes.
3-Hydroxyterphenyllin is a p-terphenyl fungal metabolite originally isolated from A. candidus that has diverse biological activities, including antioxidant, antiproliferative, antibacterial, and antiviral properties.1,2,3,4 It has a 96% scavenging effect on 2,2-diphenyl-1-picrylhydrazyl radicals when used at a concentration of 100 μg/ml.2 3-Hydroxyterphenyllin inhibits the growth of HeLa cervical, A549 lung, and HepG2 liver cancer cells (IC50s = 23, 36, and 32 μM, respectively), as well as methicillin-resistant S. aureus (MRSA) and V. vulnificus bacteria (MIC = 31 μg/ml for both).3 It also inhibits HIV-1 integrase in both coupled and strand transfer assays (IC50s = 2.8 and 12.1 μM, respectively).4References1. Kurobane, I., Vining, L.C., McInnes, A.G., et al. 3-Hydroxyterphenyllin, a new metabolite of Aspergillus candidus. Structure elucidation by 1H and 13C nuclear magnetic resonance spectroscopy. J. Antibiot. (Tokyo) 32(6), 559-564 (1979).2. Yen, G.-C., Chang, Y.-C., Sheu, F., et al. Isolation and characterization of antioxidant compounds from Aspergillus candidus broth filtrate. J. Agric. Food Chem. 49(3), 1426-1431 (2001).3. Wang, W., Liao, Y., Tang, C., et al. Cytotoxic and antibacterial compounds from the coral-derived fungus Aspergillus tritici SP2-8-1. Mar. Drugs 15(11), E348 (2017).4. Singh, S.B., Jayasuriya, H., Dewey, R., et al. Isolation, structure, and HIV-1-integrase inhibitory activity of structurally diverse fungal metabolites. J. Ind. Microbiol. Biotechnol. 30(12), 721-731 (2003).
3-Hydroxyterphenyllin is a p-terphenyl fungal metabolite originally isolated from A. candidus that has diverse biological activities, including antioxidant, antiproliferative, antibacterial, and antiviral properties.1,2,3,4 It has a 96% scavenging effect on 2,2-diphenyl-1-picrylhydrazyl radicals when used at a concentration of 100 μg/ml.2 3-Hydroxyterphenyllin inhibits the growth of HeLa cervical, A549 lung, and HepG2 liver cancer cells (IC50s = 23, 36, and 32 μM, respectively), as well as methicillin-resistant S. aureus (MRSA) and V. vulnificus bacteria (MIC = 31 μg/ml for both).3 It also inhibits HIV-1 integrase in both coupled and strand transfer assays (IC50s = 2.8 and 12.1 μM, respectively).4
References1. Kurobane, I., Vining, L.C., McInnes, A.G., et al. 3-Hydroxyterphenyllin, a new metabolite of Aspergillus candidus. Structure elucidation by 1H and 13C nuclear magnetic resonance spectroscopy. J. Antibiot. (Tokyo) 32(6), 559-564 (1979).2. Yen, G.-C., Chang, Y.-C., Sheu, F., et al. Isolation and characterization of antioxidant compounds from Aspergillus candidus broth filtrate. J. Agric. Food Chem. 49(3), 1426-1431 (2001).3. Wang, W., Liao, Y., Tang, C., et al. Cytotoxic and antibacterial compounds from the coral-derived fungus Aspergillus tritici SP2-8-1. Mar. Drugs 15(11), E348 (2017).4. Singh, S.B., Jayasuriya, H., Dewey, R., et al. Isolation, structure, and HIV-1-integrase inhibitory activity of structurally diverse fungal metabolites. J. Ind. Microbiol. Biotechnol. 30(12), 721-731 (2003).
Stachybotrysin B is a fungal metabolite originally isolated from S. chartarum and has antiviral and anticancer activities.1,2 It has antiviral activity against HIV in SupT1 cells (IC50 = 19.2 μM).1 Stachybotrysin B is cytotoxic to K562, HeLa, and HL-60 cells (IC50s = 21.72, 39.63, and 18.5 μM, respectively).2
|1. Zhao, J., Feng, J., Tan, Z., et al. Stachybotrysins A-G, phenylspirodrimane derivatives from the fungus Stachybotrys chartarum. J. Nat. Prod. 80(6), 1819-1826 (2017).|2. Ma, X.-h., Zheng, W.-m., Sun, K.-h., et al. Two new phenylspirodrimanes from the deep-sea derived fungus Stachybotrys sp. MCCC 3A00409. Nat. Prod. Res. 33(3), 386-392 (2018).
Inophyllum B ((+)-Inophyllum B) 是一种有效的HIV 逆转录酶 (Reverse Transcriptase) 抑制剂,IC50为 38 nM。Inophyllum B 在体外细胞培养中抑制HIV-1(IC50=1.4 μM)。Inophyllum B 可从非洲大蜗牛Achatina fulica 的丙酮提取物中分离得到。