Quinazolinone nitriles and related metabolites from the deep-sea-derived fungus MCCC 3A00265.

Two new quinazolinone nitriles (1 and 2) and one new indole alkaloid (3), together with 13 known compounds, were isolated from the deep-sea-derived MCCC 3A00265. Their structures were determined by extensive spectroscopic analysis, with the absolute configurations established by comparing experimental and calculated electronic circular dichroism (ECD) and optical rotation (OR) data as well as biogenetic considerations. Viricyanoamides A and B (1 and 2) are the sole representatives of quinazolinones featuring a nitrile group, while solitumidine F (3) incorporates a rare pyrrolidinedione unit as an indole terpenoid.

Chemical Constituents of the Deep-sea Derived Fungus Purpureocillium lilacinum XIA-9.

Two new sphingosine derivatives (1 and 2), two new vicinal diol analogs (3 and 4), one new diol analog (5), one new fatty acid (9), together with 19 known compounds (6-8, 10-24), were isolated from Purpureocillium lilacinum XIA-9. Their structures were determined by detailed analysis of the 1D and 2D NMR, HRESIMS, and optical rotatory data. Fusarubin 3-methyl ether (17) exhibited potent inhibition on RSL3 induced ferroptosis with the EC value of 0.

Nigenolides A-H, 13 new microperfuranones with ferroptosis inhibitory activity from the deep-sea-derived Aspergillus niger.

Thirteen new microperfuranones, including five pairs of enantiomers, (±)-nigenolides A-E (1a/1b-5a/5b), and three racemate nigenolides F-H (6-8), together with four known analogues (9-12) were isolated from a deep-sea-derived Aspergillus niger 3A00562. The absolute configurations of the five pairs of enantiomers were determined by the comparison of the calculated and experimental ECD spectra. Compounds 3a, 4a, 4b, and 12 were able to inhibit RSL3-induced ferroptosis.

Stephaochratidin A, a Rare Stephacidin-Asperochratide Hybrid with Ferroptosis Inhibitory Activity from the Deep-Sea-Derived .

One rare stephacidin-asperochratide hybrid, stephaochratidin A (), was isolated from the deep-sea-derived MCCC 3A00521. The relative structure of was determined by comprehensive analyses of its 1D and 2D NMR data as well as HRESIMS data. And the absolute configuration was unambiguously assigned by ECD calculations and the X-ray single-crystal diffraction analysis.

Adsorption properties of cellulose-derived hydrogel and magnetic hydrogels from Sophora flavescens on Cu and Congo red.

This study synthesized a robust, magnetically responsive hydrogel from Sophora flavescens-modified cellulose and chitosan, employing Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA and DTG), and scanning electron microscopy (SEM) to confirm the preservation of cellulose's intrinsic properties and the hydrogel's remarkable elasticity, toughness, and porosity. These hydrogels integrate cellulose's structural backbone with functional moieties from chitosan, enhancing adsorption capabilities for Cu ions and Congo red (CR) dye. Kinetic and thermodynamic analyses reveal that adsorption is spontaneous and endothermic, following a pseudo-second-order model and the Freundlich isotherm.

Comparison of the chemical constituents of Saposhnikoviae Radix associated with three different growth patterns and its therapeutic effect against atopic dermatitis.

Ethnopharmacological Relevance: Saposhnikoviae Radix (SR) was initially documented in Shennong Bencao Jing classics for its properties in dispelling wind, dissolving surface, relieving pain, and alleviating spasms. This herb is commonly used in traditional Chinese medicine to address conditions that affect the body's surface, by aiding in the expulsion of pathogens from the surface and alleviating pain associated with the immune response. Atopic dermatitis (AD) is a prevalent allergic skin disorder, and the therapeutic effects of SR in dispelling wind and relieving the body's surface are consistent with the clinical symptoms commonly observed in AD.

Genome Mining of a Deep-Sea-Derived Revealed Polyketide-Terpenoid Hybrids with Antiosteoporosis Activity.

Two novel meroterpenoids, alliisativins A and B (, ) were discovered through a genome-based exploration of the biosynthetic gene clusters of the deep-sea-derived fungus MCCC entry 3A00580. Extensive spectroscopic analysis, quantum calculations, chemical derivatization, and biogenetic considerations were utilized to establish their structures. Alliisativins A and B (, ) possess a unique carbon skeleton featuring a drimane sesquiterpene with a highly oxidized polyketide.

Lead Optimization of Butyrolactone I as an Orally Bioavailable Antiallergic Agent Targeting FcγRIIB.

Food allergy (FA) poses a growing global food safety concern, yet no effective cure exists in clinics. Previously, we discovered a potent antifood allergy compound, butyrolactone I (BTL-I, ), from the deep sea. Unfortunately, it has a very low exposure and poor pharmacokinetic (PK) profile in rats.

Chemical Constituents from the deep-sea-derived Fungus Aureobasidium melanogenum LUO5.

Three new C and C aliphatic δ-lactones (1-3), three new fatty acid methyl esters (4-6), and eight known compounds (7-14) were isolated from the marine Aureobasidium sp. LUO5. Their structures were established by detailed analyses of the NMR, HRESIMS, optical rotation, and ECD data.

Marine-Derived Alternariol Monomethyl Ether Alleviates Ovalbumin-Induced Food Allergy by Suppressing MAPK and NF-κB Signaling Pathways of Mast Cells.

The prevalence of food allergies has grown dramatically over the past decade. Recently, studies have shown the potential of marine substances to alleviate food allergies. We utilized a rat basophilic leukemia (RBL)-2H3 model to evaluate the antiallergic effects of alternariol monomethyl ether (AME) extracted from marine fungi .

Anti-necroptosis and anti-ferroptosis compounds from the Deep-Sea-Derived fungus Aspergillus sp. MCCC 3A00392.

Eight undescribed (1-8) and 46 known compounds (9-54) were isolated from the deep-sea-derived Aspergillus sp. MCCC 3A00392. Compounds 1-3 were three novel oxoindolo diterpenoids, 4-6 were three bisabolane sesquiterpenoids, while 7 and 8 were two monocyclic cyclopropanes.

Penidihydrocitrinins A-C: New Polyketides from the Deep-Sea-Derived W17 and Their Anti-Inflammatory and Anti-Osteoporotic Bioactivities.

Three new polyketides (penidihydrocitrinins A-C, -) and fourteen known compounds (-) were isolated from the deep-sea-derived W17. Their structures were elucidated by comprehensive analyses of 1D and 2D NMR, HRESIMS, and ECD calculations. Compounds - were evaluated for their anti-inflammatory and anti-osteoporotic bioactivities.

Citriquinolinones A and B: Rare Isoquinolinone-Embedded Citrinin Analogues and Related Metabolites from the Deep-Sea-Derived 170217.

A systematic chemical investigation of the deep-sea-derived fungus 170217 resulted in the isolation of six new (-) and 45 known (-) compounds. The structures of the new compounds were established on the basis of exhaustive analysis of their spectroscopic data and theoretical-statistical approaches including GIAO-NMR, TDDFT-ECD/ORD calculations, DP4+ probability analysis, and biogenetic consideration. Citriquinolinones A () and B () feature a unique isoquinolinone-embedded citrinin scaffold, representing the first exemplars of a citrinin-isoquinolinone hybrid.

Penicopeptide A (PPA) from the deep-sea-derived fungus promotes osteoblast-mediated bone formation and alleviates ovariectomy-induced bone loss by activating the AKT/GSK-3β/β-catenin signaling pathway.

The potential of marine natural products as effective drugs for osteoporosis treatment is an understudied area. In this study, we investigated the ability of lead compounds from deep-sea-derived Penicillium solitum MCCC 3A00215 to promote bone formation in vitro and in vivo. We found that penicopeptide A (PPA) promoted osteoblast mineralization among bone marrow mesenchymal stem cells (BMSCs) in a concentration-dependent manner, and thus, we selected this natural peptide for further testing.

Chemical Constituents of the Deep-sea Gammarid Shrimp-Derived Fungus Penicillium citrinum XIA-16.

One new alkaloid, (S)-2-acetamido-4-(2-(methylamino)phenyl)-4-oxobutanoic acid (1), was isolated from the deep-sea-derived Penicillium citrinum XIA-16, together with 25 known compounds including ten polyketones (2-11), eight alkaloids (12-19), six steroids (20-25), and a fatty acid (26). Their planar and relative structures were determined by an analysis of 1D and 2D nuclear magnetic resonance (NMR) as well as high resolution electrospray ionization mass spectroscopy (HR-ESI-MS) data. The absolute configuration of 1 was determined by comparison of the experimental and calculated electronic circular dichroism (ECD) spectra.

extract inhibits quorum sensing associated virulence factors of .

is now becoming a propensity for its highly antimicrobial-resistant clinical infections. Currently, it provides a novel strategy to prevent and control microbial infection by regulating quorum sensing (QS). Deep-sea-derived fungi are rich in QS bioactive constituents.

Neotricitrinols A-C, unprecedented citrinin trimers with anti-osteoporosis activity from 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).

Hyposterolactone A, a 3α-Hydroxy Steroidal Lactone from the Deep-Sea-Derived Fungus Hypocrea sp. ZEN14.

Chemical investigation of the deep-sea-derived fungus Hypocrea sp. ZEN14 afforded a new 3α-hydroxy steroidal lactone, hyposterolactone A (1) and 25 known secondary metabolites (2-26). The structure of the new compound was established by detailed spectroscopic analysis, electronic circular dichroism (ECD) calculation as well as a J-based configuration analysis.

Ferroptosis Inhibitory Compounds from the Deep-Sea-Derived Fungus sp. MCCC 3A00126.

Two new xanthones ( and ) were isolated from the deep-sea-derived fungus sp. MCCC 3A00126 along with 34 known compounds (-). The structures of the new compounds were established by spectroscopic data.

Marine life as a source for breast cancer treatment: A comprehensive review.

Breast cancer, one of the most significant tumors among all cancer cells, still has deficiencies for effective treatment. Moreover, substitute treatments employing natural products as bioactive metabolites has been seriously considered. The source of bioactive metabolites are not only the most numerous but also represent the richest source.

Chemical Constituents of the Deep-Sea-Derived MCCC 3A00169 and Their Antiproliferative Effects.

Six new citreoviridins (citreoviridins J-O, -) and twenty-two known compounds (-) were isolated from the deep-sea-derived MCCC 3A00169. The structures of the new compounds were determined by spectroscopic methods, including the HRESIMS, NMR, ECD calculations, and dimolybdenum tetraacetate-induced CD (ICD) experiments. Citreoviridins J-O (-) are diastereomers of 6,7-epoxycitreoviridin with different chiral centers at C-2-C-7.

Tetracyclic Steroids Bearing a Bicyclo[4.4.1] Ring System as Potent Antiosteoporosis Agents from the Deep-Sea-Derived Fungus sp. W23.

Chemical investigation of the deep-sea-derived fungus sp. W23 resulted in the identification of six new (-, , , ) and 12 known (, , -) cyclocitrinol analogues, together with one handling artifact (), all featuring an unusual 7/7/6/5-tetracyclic scaffold and bicyclo[4.4.

Chemical Constituents of the Deep-Sea-Derived Fungus Cladosporium oxysporum 170103 and Their Antibacterial Effects.

The Cladosporium fungi, one of the largest genera of dematiaceous hyphomycetes, could produce various bioactive secondary metabolites. From the AcOEt-soluble extract of Cladosporium oxysporum 170103, three new secopatulolides (1-3) and thirteen known compounds (4-16) were obtained. Their structures were established by detailed analysis of the NMR and HR-ESI-MS data.

Three New Lanostanoids with Anti-HCV Effects from Abies nukiangensis.

Three new lanostane derivatives (1-3) and twelve known triterpenoids (4-15) were isolated from the twigs and leaves of Abies nukiangensis. The structures of the new compounds were elucidated mainly by detailed analysis of their NMR and HR-ESI-MS spectroscopic data. Evaluation of the anti-HCV effects of all isolates showed that 3 exhibited moderate effect with the EC value of 11.