Luca Pozzi, Andrea Gotti, Marco Fumagalli, Andrea Citarella, Valerio Fasano, Giuseppe Paladino, Umberto Ciriello, Salvatore Princiotto, Francesca Annunziata, Giulia Martinelli, Enrico Sangiovanni, Andrea Pinto, Mario Dell'Agli, Daniele Passarella
{"title":"Cannabizetol, a Novel Cannabinoid: Chemical Synthesis, Anti-inflammatory Activity and Extraction from <i>Cannabis sativa</i> L.","authors":"Luca Pozzi, Andrea Gotti, Marco Fumagalli, Andrea Citarella, Valerio Fasano, Giuseppe Paladino, Umberto Ciriello, Salvatore Princiotto, Francesca Annunziata, Giulia Martinelli, Enrico Sangiovanni, Andrea Pinto, Mario Dell'Agli, Daniele Passarella","doi":"10.1021/acs.jnatprod.5c00826","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00826","url":null,"abstract":"<p><p>We report the first isolation of a previously unknown cannabinoid, cannabizetol (CBGD, <b>7</b>), from <i>Cannabis sativa</i> extracts, representing the third member of the rare class of methylene-bridged dimeric cannabinoids. The availability of a chemically synthesized standard was crucial for its unequivocal identification, thus confirming the natural occurrence of this new compound. In addition to this structural discovery, we demonstrate that cannabizetol exhibits remarkable antioxidant and skin anti-inflammatory activity, significantly higher than that observed for the known dimeric cannabinoid cannabitwinol (CBDD, <b>6</b>). These results highlight cannabizetol as a promising bioactive metabolite with potential dermatological applications. To further enable its study, we developed a continuous flow approach to optimize the preparation of these dimers, achieving a substantial reduction in reaction times.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fan Zhang, Christopher D Roberts, Tae Hyun Lee, Doug R Braun, Zachary D Bennett, Shaurya Chanana, Song Guo, Gene E Ananiev, Ilia A Guzei, Scott R Rajski, Thomas C Brunold, Tim S Bugni
{"title":"Actinomycetoquinones A-E, Anthraquinone-γ-Pyrones Discovered from Marine-Derived <i>Actinomycetospora</i> sp. Bacterium.","authors":"Fan Zhang, Christopher D Roberts, Tae Hyun Lee, Doug R Braun, Zachary D Bennett, Shaurya Chanana, Song Guo, Gene E Ananiev, Ilia A Guzei, Scott R Rajski, Thomas C Brunold, Tim S Bugni","doi":"10.1021/acs.jnatprod.5c00578","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00578","url":null,"abstract":"<p><p>Facilitated by LC-MS-PCA metabolomics methods and effective molecular networking for strain prioritization and dereplication, five new anthraquinone-γ-pyrones, actinomycetoquinones A-E (<b>1</b>-<b>5</b>), were isolated from a marine-derived <i>Actinomycetospora</i> sp. bacterium. The structures of <b>1</b>-<b>5</b> were elucidated by analysis of their HRMS and NMR spectroscopic data. The absolute configuration of <b>1</b> was unequivocally determined by single-crystal X-ray diffraction analysis using Cu Kα radiation. Actinomycetoquinone C exhibited antibacterial activity against methicillin-resistant <i>S. aureus</i> (MRSA) and <i>E. coli</i> with MIC values of 1 and 4 μg/mL, respectively.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145147154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Role of Nucleotide Sequencing in Natural Product Drug Discovery.","authors":"Samantha C Waterworth","doi":"10.1021/acs.jnatprod.5c00876","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00876","url":null,"abstract":"<p><p>For millennia, humans have drawn upon natural sources for medicinal remedies. However, the discovery process was often a serendipitous endeavor, and the true biosynthetic potential of the planet's biodiversity remained largely hidden. The advent of nucleotide sequencing offered a pivotal shift, providing tools to decipher the cryptic codes within biosynthetic machinery. In this Perspective, I describe the arc of the sequencing era, from its foundational impact to the current landscape of sophisticated bioinformatic tools. Furthermore, I will address the international legal frameworks being implemented to protect the very biodiversity upon which the field of natural product discovery relies.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145147183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kaimin Jia, Helen Sun, Quang Kim Huynh, Dunya Al Marzooqi, Yongle Du, Yiyan Zhou, Wenjun Zhang
{"title":"Discovery of Isonitrile Lipopeptide Chalkophores from Pathogenic Mycobacteria.","authors":"Kaimin Jia, Helen Sun, Quang Kim Huynh, Dunya Al Marzooqi, Yongle Du, Yiyan Zhou, Wenjun Zhang","doi":"10.1021/acs.jnatprod.5c00904","DOIUrl":"10.1021/acs.jnatprod.5c00904","url":null,"abstract":"<p><p>The virulence-associated isonitrile lipopeptide (INLP) biosynthetic gene cluster is conserved across <i>Mycobacterium tuberculosis</i> and many nontuberculous mycobacteria (NTM) pathogens, yet the corresponding mycobacterial metabolites have not been fully characterized, and their biological functions are still debated. Here, we report a precursor neutral loss chromatography based mass spectrometry strategy that enables the targeted discovery of INLPs from <i>Mycobacterium fortuitum</i>, a fast-growing NTM pathogen. By monitoring a characteristic neutral loss of 27.1 Da corresponding to hydrogen cyanide, we identified a family of INLPs directly from bacterial culture extracts. Structural elucidation of a representative compound using NMR and high-resolution MS revealed a distinctive terminal methylated carboxyl group, contrasting with previously reported INLPs bearing linear alcohol, acetal, or cyclic motifs. Bioinformatic analysis and in vitro enzymatic assays identified a methyltransferase encoded within the INLP BGC responsible for methyl ester formation. Furthermore, metal-binding assays demonstrated selective chelation of Cu(I) and Cu(II) by the isolated INLP, but no detectable interaction with Zn(II), suggesting a role in copper homeostasis. These findings represent the first full structural characterization of an INLP from pathogenic mycobacteria, expand our understanding of the enzymes involved in INLP modification, and unequivocally support the copper-binding activity of INLPs from these pathogens.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12462896/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145129564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Savannah G Anez, Daghan B Flail, Eric P Burkhart, Joshua J Kellogg
{"title":"Targeted and Untargeted Mass Spectrometry Do Not Detect Grayanane-Type Toxins in <i>Monotropa uniflora</i> L.","authors":"Savannah G Anez, Daghan B Flail, Eric P Burkhart, Joshua J Kellogg","doi":"10.1021/acs.jnatprod.5c00805","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00805","url":null,"abstract":"<p><p><i>Monotropa uniflora</i> L. (\"ghost pipe\"), is a North American traditional medicinal plant which has recently seen an increase in consumption nationwide. However, a single 1889 study reported the presence of grayanotoxin I in M. uniflora, generating controversy regarding its safety. It is essential to revisit this claim of toxicity given <i>Monotropa uniflora</i>'s resurgence in popularity. We applied more sensitive analytical techniques to determine the possible presence of grayanotoxins in a diverse sampling of <i>M. uniflora</i>, using mass spectrometry and MS<sup>2</sup>-based molecular networking. Across 50 <i>M. uniflora</i> samples, neither grayanotoxins nor structural analogues were detected, refuting the earlier analysis.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145123795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aoi Kimishima, Yukihiro Asami, Naozumi Kondo, Sota Negami, Sota Honma, Yukiko Ujie
{"title":"Threonyl-tRNA Synthetase Is the Target of Borrelidin Insecticidal Activity against Silkworms.","authors":"Aoi Kimishima, Yukihiro Asami, Naozumi Kondo, Sota Negami, Sota Honma, Yukiko Ujie","doi":"10.1021/acs.jnatprod.5c00737","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00737","url":null,"abstract":"<p><p>We explore borrelidin and semisynthetic derivatives as promising pesticide candidates targeting threonyl-tRNA synthetase (ThrRS). Enzymatic inhibition assays and pull-down assays supported ThrRS as the target of borrelidins for insecticidal activity. Interestingly, derivative <b>6</b> showed weak <i>in vitro</i> inhibition but comparable <i>in vivo</i> insecticidal activity to borrelidin. Comparative efficacy tests via intravenous (i.v.) and intraperitoneal (i.p.) administration in silkworm larvae indicated improved pharmacokinetics for compound <b>6</b>. These findings highlight ThrRS as a valuable insecticidal target and demonstrate the effectiveness of our original silkworm-based screening platform in identifying lead compounds with favorable pharmacokinetics that are often overlooked by conventional <i>in vitro</i> screening approaches.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145123790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Esteban López-Sampedro, Roberto Arreguin-Espinosa, Ana M Simonet
{"title":"Cytotoxic Triterpene Glycosides from Mexican Sea Cucumber <i>Holothuria inornata</i>.","authors":"Esteban López-Sampedro, Roberto Arreguin-Espinosa, Ana M Simonet","doi":"10.1021/acs.jnatprod.5c00716","DOIUrl":"https://doi.org/10.1021/acs.jnatprod.5c00716","url":null,"abstract":"<p><p>Sea cucumbers (Holothuriidae) are highly valued in traditional medicine and are recognized for their diverse bioactivities, which are largely attributed to their rich triterpene glycoside content. Given that <i>Holothuria inornata</i> was chemically uncharacterized, this study describes the bioassay-guided isolation of these compounds. Nine sulfated saponins were purified, and their structures were elucidated using UPLC-QTOF/HR-ESI-MS<sup><i>n</i></sup> and comprehensive NMR spectroscopy. Six new compounds were identified, including inornatosides A-C (<b>1</b>-<b>3</b>) and 22<i>R</i>-holothurin B (<b>6</b>), all possessing a holostane-type aglycone, alongside inornatosides D (<b>4</b>) and E (<b>5</b>), which feature unique aglycones. Cytotoxic assays revealed that inornatoside B (<b>2</b>) exhibited potent cytotoxic activity against human mammary adenocarcinoma (MCF-7) and human lung adenocarcinoma (SKLU-1) cell lines, with IC<sub>50</sub> values between 0.47 and 0.50 μM surpassing the efficacy of the positive control. These findings not only expand the chemical diversity of holothurins but also position <i>H. inornata</i> as a promising source of anticancer compounds.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145111587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, Synthesis, and Antibacterial Activity of Long-Chain Alkyl-Substituted DemethyloxyAaptamine Derivatives","authors":"Yingqiu Liu, , , Wei Wu, , , Haitao Xue, , , Shu-Ping Wang, , , Jing Xu, , , Tao Zhang*, , , Hou-Wen Lin*, , and , Hongze Liao*, ","doi":"10.1021/acs.jnatprod.5c00571","DOIUrl":"10.1021/acs.jnatprod.5c00571","url":null,"abstract":"<p >Demethyloxyaaptamine, isolated from the marine sponge <i>Aaptos aaptos</i>, features a <i>1H</i>-benzo[<i>de</i>][1,6]naphthyridine core and exhibits potent antibacterial activity. To systematically investigate its underexplored antibacterial properties and facilitate structural optimization, we constructed a focused library of 28 C-3 alkylamino–substituted derivatives of demethyloxyaaptamine via regioselective functionalization. <i>In vitro</i> evaluation against <i>Staphylococcus aureus</i> revealed that several derivatives possess minimum inhibitory concentrations (MICs) superior to vancomycin. Structure–activity relationship analysis (SAR) demonstrated that the incorporation of moderately hydrophobic alkylamino groups at the C-3 position markedly improved antimicrobial efficacy. Mechanistic investigations demonstrated that these compounds inhibit bacterial growth by targeting bacterial membrane. Together, these findings validate demethyloxyaaptamine as a privileged scaffold for targeting drug-resistant Gram-positive pathogens and deliver critical SAR insights to guide the design of next-generation antibiotics.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":"88 9","pages":"2097–2106"},"PeriodicalIF":3.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145079078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ulleungpeptins A and B: Antiangiogenic Lipohexapeptides Containing E/Z-Decadienoic Acid Moieties from Streptomyces sp. 13F051","authors":"Gwi Ja Hwang, , , Jongtae Roh, , , Kyung Taek Heo, , , Byeongsan Lee, , , Sangkeun Son, , , Young-Sam Kim, , , Jun-Pil Jang, , , Sung-Kyun Ko*, , , Young-Soo Hong*, , and , Jae-Hyuk Jang*, ","doi":"10.1021/acs.jnatprod.5c00880","DOIUrl":"10.1021/acs.jnatprod.5c00880","url":null,"abstract":"<p >Two new lipopeptides, ulleungpeptins A and B (<b>1</b> and <b>2</b>), were isolated from cultures of <i>Streptomyces</i> sp. 13F051. Spectroscopic analyses revealed that both compounds consist of a 2,4-decadienoic acid moiety conjugated to a hexapeptide incorporating the non-proteinogenic amino acid 3,5-dihydroxyphenylglycines (Dpgs). Detailed NMR studies established that the two compounds differ in the configuration of the double bonds within the 2,4-decadienoic acid moiety. The absolute configurations of the amino acid residues were determined by advanced Marfey’s analysis, supported by bioinformatic predictions. Bioactivity evaluation demonstrated that compounds <b>1</b> and <b>2</b> inhibit angiogenesis in HUVEC cells without exhibiting cytotoxicity.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":"88 9","pages":"2225–2232"},"PeriodicalIF":3.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145068621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xinge Huang, , , Hongliang Li, , , Hui Lu, , , Haji Akber Aisa*, , and , Jun Li*,
{"title":"Chlorinated Guaiane-Type Sesquiterpene Lactones of Natural Origin","authors":"Xinge Huang, , , Hongliang Li, , , Hui Lu, , , Haji Akber Aisa*, , and , Jun Li*, ","doi":"10.1021/acs.jnatprod.5c00844","DOIUrl":"10.1021/acs.jnatprod.5c00844","url":null,"abstract":"<p >Organohalogen natural products play a crucial role in drug research, with halogenation generally enhancing the bioactivity of natural compounds. Chlorinated natural compounds, a major category of organohalogens, are found in both marine and terrestrial environments. Among these, terpenoids are abundant compounds with diverse structures. Guaiane-type sesquiterpene lactones, with a [5,7,5] tricyclic skeleton, are one such class. Since the first examples in 1968, 102 natural chlorinated guaiane-type sesquiterpene lactones has been isolated from Asteraceae family plants. These compounds exhibit significant structural diversity, with chlorine located at various positions, including C-1, C-2, C-3, C-4, C-5 in the cyclopentyl, and C-13, C-14, C-15, and C-18 at the C-8 substituent. Determining the structure of these compounds, especially regarding chlorine position and stereochemistry, is challenging, with some structures revised using chemical computational techniques. Although few studies have examined their bioactivity, these compounds exhibit various bioactivities, including cytotoxic, anti-inflammatory, melanogenesis and tyrosinase stimulation, antimicrobial, antiviral, neuroprotective, inhibition effects on butyrylcholinesterase and acetylcholinesterase, and hematopoietic stem cell expansion activities. This review summarizes the natural origin, structural and NMR characteristics, and bioactivities of these rare compounds, offering an overview of their current research status, future pharmaceutical potential, and highlighting existing gaps and further directions.</p>","PeriodicalId":47,"journal":{"name":"Journal of Natural Products ","volume":"88 9","pages":"2279–2300"},"PeriodicalIF":3.6,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145051407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}