Marine natural products.

Fungi are renowned as one of the most fruitful sources of chemodiversity and for their ubiquitous occurrence. Among the many taxonomic groupings considered for the implications deriving from their biosynthetic aptitudes, the genus Cladosporium stands out as one of the most common in indoor environments. A better understanding of the impact of these fungi on human health and activities is clearly based on the improvement of our knowledge of the structural aspects and biological properties of their secondary metabolites, which are reviewed in the present paper.

The Genus Cladosporium: A Rich Source of Diverse and Bioactive Natural Compounds.

The marine environment is an underexplored treasure that hosts huge biodiversity of microorganisms. Marine-derived fungi are a rich source of novel metabolites with unique structural features, bioactivities, and biotechnological applications. Marine-associated Cladosporium species have attracted considerable interest because of their ability to produce a wide array of metabolites, including alkaloids, macrolides, diketopiperazines, pyrones, tetralones, sterols, phenolics, terpenes, lactones, and tetramic acid derivatives that possess versatile bioactivities. Moreover, they produce diverse enzymes with biotechnological and industrial relevance. This review gives an overview on the Cladosporium species derived from marine habitats, including their metabolites and bioactivities, as well as the industrial and biotechnological potential of these species. In the current review, 286 compounds have been listed based on the reported data from 1998 until July 2021. Moreover, more than 175 references have been cited.

Untapped Potential of Marine-Associated Cladosporium Species: An Overview on Secondary Metabolites, Biotechnological Relevance, and Biological Activities.

Sorbicillinoids are a family of hexaketide metabolites with a characteristic sorbyl side chain residue. Sixty-nine sorbicillinoids from fungi, newly identified from 2016 to 2021, are summarized in this review, including their structures and bioactivities. They are classified into monomeric, dimeric, trimeric, and hybrid sorbicillinoids according to their basic structural features, with the main groups comprising both monomeric and dimeric sorbicillinoids. Some of the identified sorbicillinoids have special structures such as ustilobisorbicillinol A, and sorbicillasins A and B. The majority of sorbicillinoids have been reported from fungi genera such as Acremonium, Penicillium, Trichoderma, and Ustilaginoidea, with some sorbicillinoids exhibiting cytotoxic, antimicrobial, anti-inflammatory, phytotoxic, and α-glucosidase inhibitory activities. In recent years, marine-derived, extremophilic, plant endophytic, and phytopathogenic fungi have emerged as important resources for diverse sorbicillinoids with unique skeletons. The recently revealed biological activities of sorbicillinoids discovered before 2016 are also described in this review. 

https://www.mdpi.com/2309-608X/8/1/62/pdf?version=1641553436

Recent Advances in Sorbicillinoids from Fungi and Their Bioactivities (Covering 2016–2021)

Asperochratides A-J, Ten new polyketides from the deep-sea-derived Aspergillus ochraceus.

Dimeric citrinins diversity revealed by the deep-sea-derived Penicillium citrinum W23.

Marine fungi are prolific source for the discovery of structurally diverse and bioactive molecules. In our search for new anti-osteoporosis compounds from deep-sea-derived fungi, we prioritized a fungus whose extract exhibited moderate activity and rich chemical diversity. The investigation of this strain afforded a class of citrinins, including three new citrinin trimers, neotricitrinols A–C (1–3), and three known dimeric/monomeric precursors (4–6). Neotricitrinols A–C (1–3) feature a unique octacyclic carbon scaffold among the few reported citrinin trimers with their absolute configurations established by spectroscopic analysis, theoretical-statistical approaches (GIAO-NMR, TDDFT-ECD/ORD calculations), DP4+ probability analysis as well as biogenetic consideration. A plausible biosynthetic pathway linking 1–3 from the common intermediate metabolite penicitrinol A (4) was proposed. Biologically, neotricitrinol B (2) showed potential anti-osteoporosis activity by promoting osteoblastogenesis and inhibiting adipogenic differentiation on primary bone mesenchymal stem cells, while displaying no cytotoxicity. 

Neotricitrinols A-C, unprecedented citrinin trimers with anti-osteoporosis activity from the deep-sea-derived Penicillium citrinum W23.

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Asperochratides A-J, Ten new polyketides from the deep-sea-derived Aspergillus ochraceus.

Dimeric citrinins diversity revealed by the deep-sea-derived Penicillium citrinum W23.

Neotricitrinols A-C, unprecedented citrinin trimers with anti-osteoporosis activity from the deep-sea-derived Penicillium citrinum W23.