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21 pages, 2219 KB  
Article
Chemical and Biological Investigation of the Endophytic Aspergillus terreus (SU5) Inhabiting Date Fruits (Phoenix dactylifera)
by Ahmed Abdel-Hadi, Mohammed Alaidarous, Abdulrahman Alatiq, Yahya Madkhali, Saeed Banawas, Mohamed Abouelela and Abdallah Hassane
J. Fungi 2026, 12(4), 249; https://doi.org/10.3390/jof12040249 - 30 Mar 2026
Abstract
Endophytic fungi associated with date fruits (Phoenix dactylifera) are mostly under-explored, despite their potential as reservoirs of natural compounds. The aims of this study were to characterize the endophytic fungus Aspergillus terreus (SU5) isolated from date fruits, and to investigate its [...] Read more.
Endophytic fungi associated with date fruits (Phoenix dactylifera) are mostly under-explored, despite their potential as reservoirs of natural compounds. The aims of this study were to characterize the endophytic fungus Aspergillus terreus (SU5) isolated from date fruits, and to investigate its biological activities and chemical profile for the first time. Morphological and molecular methods were utilized to identify Aspergillus terreus. A liquid chromatography–mass spectrometry analysis (LC/MS/MS) was conducted to determine the chemical profile of the crude extract. Biological properties were investigated through acetylcholine esterase and butyrylcholine esterase inhibition, cytotoxicity assays against MCF-7 and MCF-7/Adr, and antioxidant assays. LC/MS/MS of the fungal extract resulted in the detection of 39 of established secondary metabolites, primarily comprising polyketides, quinones, and phenolic derivatives. The crude extract demonstrated significant antioxidant activity, especially in the ABTS assay (IC50 = 50.18 μg/mL), considerable cytotoxicity against MCF-7 breast cancer cells, diminished efficacy against the drug-resistant MCF-7/Adr cell line, and preferential inhibition of butyrylcholinesterase compared to acetylcholinesterase. While none of the identified compounds are novel, numerous metabolites are documented here for the first time from an endophytic A. terreus associated with date fruits. The findings underscore date fruits as a prospective ecological niche for a chemically varied endophytic fungus with potential pharmaceutical significance. Full article
(This article belongs to the Special Issue Bioactive Secondary Metabolites from Fungi)
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14 pages, 544 KB  
Article
Modelling of Cordycepin Production by an Engineered Aspergillus oryzae Under Different Substrates
by Siwaporn Wannawilai, Jutamas Anantayanon, Thanaporn Dechpreechakul, Kobkul Laoteng and Sukanya Jeennor
Fermentation 2026, 12(4), 174; https://doi.org/10.3390/fermentation12040174 - 30 Mar 2026
Abstract
Given the therapeutic potential of bioactive cordycepin in medical and healthcare products, precision fermentation using an engineered strain of Aspergillus oryzae was performed to enhance cordycepin production. To understand and predict the dynamics of cell growth and cordycepin production in this fungal strain, [...] Read more.
Given the therapeutic potential of bioactive cordycepin in medical and healthcare products, precision fermentation using an engineered strain of Aspergillus oryzae was performed to enhance cordycepin production. To understand and predict the dynamics of cell growth and cordycepin production in this fungal strain, mathematical modeling of submerged fermentation was applied. The effects of different nitrogen sources (yeast extract, peptone, (NH4)2SO4, NH4Cl, NaNO3, and KNO3) and carbon sources (glucose and cassava starch hydrolysate, CSH) on cell growth and cordycepin production were evaluated under submerged fermentation conditions. The results showed that organic nitrogen sources significantly enhanced biomass formation and cordycepin production compared with inorganic nitrogen sources. Among them, yeast extract provided the best performance, yielding the highest biomass (13.63–15.99 g/L) and cordycepin titer (1.24–1.72 g/L). In contrast, nitrate-based nitrogen sources supported cell growth but resulted in negligible cordycepin production. Under optimized conditions in a bioreactor, both glucose and CSH supported fungal growth, although CSH promoted higher biomass formation while glucose favored cordycepin biosynthesis. The kinetic model demonstrated that the growth of engineered A. oryzae was well described by the logistic growth model (R2 > 0.88). The cordycepin production profiles were well fitted by the Luedeking–Piret model (R2 > 0.99), indicating a mixed growth-associated product with kinetic constants α and β representing growth-associated and non-growth-associated production, respectively. Overall, the developed kinetic model provides a quantitative framework for describing cell growth, substrate utilization, and cordycepin formation, offering guidance for process optimization and scale-up of cordycepin production in engineered fungal systems. Full article
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23 pages, 2262 KB  
Article
Probe-Ultrasonicated Thyme Essential Oil Nanoemulsions: Physicochemical Characterization and Application in Chicken Burgers
by Tamires Soares Schug, Marcia Foster Mesko, Larissa Riberas Silveira Teixeira, Thiago Castanho Pereira, Erico Marlon Moraes Flores, Elessandra da Rosa Zavareze, Carla Rosane Barboza Mendonça, Mariano Michelon and Eliezer Avila Gandra
Foods 2026, 15(7), 1154; https://doi.org/10.3390/foods15071154 - 28 Mar 2026
Viewed by 194
Abstract
The bioactive compounds in thyme essential oil (TEO) have been investigated as natural preservatives. However, their direct application in foods is limited by their poor water solubility and high volatility. In this context, nanoemulsions represent promising delivery systems for bioactive compounds due to [...] Read more.
The bioactive compounds in thyme essential oil (TEO) have been investigated as natural preservatives. However, their direct application in foods is limited by their poor water solubility and high volatility. In this context, nanoemulsions represent promising delivery systems for bioactive compounds due to their improved physicochemical stability and functional performance. This study aimed to develop and characterize TEO nanoemulsions prepared by ultrasound-assisted encapsulation using an ultrasonic probe and whey protein concentrate as a surfactant, with potential application in chicken burgers. Different sonication times (1, 3, 5, 7, and 10 min) were evaluated, and ultrasonication time was evaluated as the experimental variable. The formulation processed for 3 min presented the smallest hydrodynamic diameter (289 nm) and a homogeneous spherical morphology. The nanoemulsions showed low cytotoxicity, maintaining cell viability above 90% at all evaluated concentrations. In vitro antibacterial assays demonstrated activity against Staphylococcus aureus and antifungal effects against Aspergillus and Penicillium species. When applied to chicken burgers, the treatment containing 100 ppm of nanoencapsulated TEO contributed to reductions in S. aureus and mesophilic aerobic microorganism counts during 7 days of refrigerated storage. These findings indicate that TEO nanoemulsions present potential as natural antimicrobial systems for food preservation applications. Full article
(This article belongs to the Special Issue Applications and Trends for Ultrasound in Food Processing)
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16 pages, 6676 KB  
Article
Anti-Neuroinflammatory Naphtho-γ-Pyrones from a Deep-Sea-Derived Fungus Aspergillus niger 3A00562
by Zi-Han Xu, Zheng-Biao Zou, Chun-Xiu Wang, Chen Li, Xian-Wen Yang and Jun-Song Wang
Mar. Drugs 2026, 24(4), 125; https://doi.org/10.3390/md24040125 - 27 Mar 2026
Viewed by 215
Abstract
Inhibition of inflammation and oxidative stress is increasingly recognized as a promising therapeutic strategy for neurodegenerative diseases. In this study, we isolated two new dimeric naphtho-γ-pyrone (aS)-fonsecinones B and D (1 and 2) and 14 known compounds [...] Read more.
Inhibition of inflammation and oxidative stress is increasingly recognized as a promising therapeutic strategy for neurodegenerative diseases. In this study, we isolated two new dimeric naphtho-γ-pyrone (aS)-fonsecinones B and D (1 and 2) and 14 known compounds (316) from the deep-sea-derived fungus Aspergillus niger 3A00562. Their structures were unambiguously determined through integrated physicochemical and spectroscopic analyses. Screening for neuroinflammatory inhibitors using a BV2 microglial cell model identified TMC 256 A1 (10) as the most potent candidate. Compound 10 significantly suppressed LPS-induced inflammation in BV2 cells without cytotoxicity. It concurrently inhibited LPS-triggered ROS overproduction and neutrophilic infiltration in zebrafish. Subsequent proteomics revealed that 10 targets NOS2 to modulate Alzheimer’s disease (AD)-associated pathways and the KEAP1-NRF2 axis. Molecular docking and dynamics simulations demonstrated that 10 occupies the NOS2 heme-binding pocket, thereby preventing dimerization and inhibiting enzymatic activity. Finally, 10 ameliorated locomotor deficits in an AD zebrafish model. Collectively, these findings highlight compound 10 as a candidate compound for preventing inflammatory and oxidative stress damage during treatment of neurodegenerative diseases, particularly AD. Full article
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15 pages, 1317 KB  
Article
Mycological Survey of Fungal Carriage in Cats and Their Owners: Analysis of Species Diversity and Antifungal Susceptibility
by Kittima Siripit, Naris Thengchaisri, Orawan Limsivilai, Sara Niae, Panpicha Sattasathuchana and Chompoonek Yurayart
J. Fungi 2026, 12(4), 245; https://doi.org/10.3390/jof12040245 - 26 Mar 2026
Viewed by 597
Abstract
Healthy and asymptomatic cats may serve as reservoirs of fungal pathogens, facilitating transmission through direct contact or environmental contamination, and they may represent an underrecognized source of subclinical fungal infection in humans, particularly among cat owners and veterinarians. We evaluated the prevalence of [...] Read more.
Healthy and asymptomatic cats may serve as reservoirs of fungal pathogens, facilitating transmission through direct contact or environmental contamination, and they may represent an underrecognized source of subclinical fungal infection in humans, particularly among cat owners and veterinarians. We evaluated the prevalence of fungal species in healthy cats and their owners, assessed potential cat–human transmission, identified feline lifestyle factors associated with Microsporum canis carriage, and evaluated antifungal susceptibility of the most prevalent isolated fungi. We collected 59 cat facial hair and 59 owner nail samples for fungal isolation and identification. Five fungal species were identified, M. canis, Aspergillus flavus, A. niger, A. fumigatus, and A. terreus, which were found in both cats and humans. Aspergillus spp. were the most frequently detected fungi in both groups. Significant associations between cats and owners were observed for M. canis (p = 0.010) and A. niger (p = 0.050). Long-haired cats showed a significantly higher prevalence of carrying M. canis (p = 0.024), while other lifestyle factors were not associated with fungal carriage. The antifungal susceptibility profiles of the tested fungi were broadly similar between feline and human isolates; however, resistance to itraconazole and amphotericin B was detected among Aspergillus spp. Healthy cats and their owners frequently share fungal species, especially M. canis, which suggests possible household zoonotic transmission. Long-haired cats are at higher risk of M. canis carriage. Full article
(This article belongs to the Special Issue Advances in Human and Zoonotic Dermatophytoses,2nd Edition)
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16 pages, 347 KB  
Article
Exploring the Potential of Hop (Humulus lupulus) Cone Residue: Chemical Characterization and Evaluation of Bioactivities
by Giulia Boito Reyes, Emylaine Pereira dos Santos, Everton da Silva Santos, Laura Correia Gonçalves, Gabriela Catuzo Canonico Silva, Zilda Cristiani Gazim, Regina Aparecida Correia Gonçalves, Arildo José Braz de Oliveira, José Pinela, Filipa Mandim, Tânia C. S. P. Pires, Lucio Cardozo-Filho, Rúbia Carvalho Gomes Corrêa and José Eduardo Gonçalves
Plants 2026, 15(7), 994; https://doi.org/10.3390/plants15070994 - 24 Mar 2026
Viewed by 378
Abstract
Humulus lupulus L. (hops), belonging to the Cannabaceae family, is grown mainly for brewing, with 98% of global production directed to this sector. Moreover, large volumes of female cone residues are generated as by-products, representing a valuable source of bioactive compounds that can [...] Read more.
Humulus lupulus L. (hops), belonging to the Cannabaceae family, is grown mainly for brewing, with 98% of global production directed to this sector. Moreover, large volumes of female cone residues are generated as by-products, representing a valuable source of bioactive compounds that can be valorized under green chemistry principles. This study aimed to extract bioactive compounds from hop cone residues sourced from craft breweries using ultrasound-assisted (EH-UA) and microwave-assisted (EH-MA) extraction methods. Hydroalcoholic extracts (70%) were analyzed for chemical composition, antioxidant, antimicrobial, antiproliferative, nitric oxide (NO)-production inhibition, and photoprotective activities. GC-MS identified 32 compounds in EH-MA and 30 in EH-UA, including terpenes, sesquiterpenes, oxygenated sesquiterpenes, and fatty acids. Both extracts demonstrated strong antioxidant activity in cell-based (TBARS, OxHLIA) and chemical (DPPH, ABTS, FRAP) assays, particularly EH-MA. Significant antibacterial activity was observed, especially against Enterobacter cloacae, Pseudomonas aeruginosa, and Staphylococcus aureus (MIC 1–10 mg/mL), as well as antifungal activity against Aspergillus brasiliensis (MIC 2–2.5 mg/mL). Selective antiproliferative activity was observed against tumor cell lines Caco-2 and MCF-7 (GI50 25 μg/mL), without cytotoxicity toward nontumor cell lines Vero and PLP2 (GI50 > 400 μg/mL). All extracts inhibited the production of the inflammation mediator NO, with EH-MA showing the most potent effect (IC50 of 35 μg/mL), followed by EH-UA (IC50 of 55 μg/mL). Photoprotective potential was also demonstrated, with SPF values of 19 (EH-MA) and 18 (EH-UA). In conclusion, hop cone residues can yield multifunctional extracts with antioxidant, antimicrobial, antiproliferative, anti-inflammatory, and photoprotective activities, which support their sustainable upcycling for pharmacological, nutraceutical, and cosmetic applications. Full article
36 pages, 4305 KB  
Article
Chemical Characterization and Evaluation of Antimicrobial, Antioxidant, and Synergistic Activities of Teucrium polium L.: An Integrated Experimental and In Silico Approach
by Khalid Zibouh, Brahim Ed-Damsyry, Aziz Drioiche, Mohamed Ed-Dahmouny, Noorah A. Alkubaisi, Mourad A. M. Aboul-Soud, Firdaous Remok, Chaimae Ibbur, Mohamed Radi, Atika Ailli, Sevser Sahpaz and Touriya Zair
Pharmaceutics 2026, 18(3), 397; https://doi.org/10.3390/pharmaceutics18030397 - 23 Mar 2026
Viewed by 425
Abstract
Background/Objectives: Teucrium polium L. is widely used in traditional medicine and has been proposed as a source of antimicrobial adjuvants in the context of antimicrobial resistance. Here, we characterized the essential oil (EO) and polar extracts of T. polium and evaluated their antioxidant [...] Read more.
Background/Objectives: Teucrium polium L. is widely used in traditional medicine and has been proposed as a source of antimicrobial adjuvants in the context of antimicrobial resistance. Here, we characterized the essential oil (EO) and polar extracts of T. polium and evaluated their antioxidant activity, antimicrobial potency against clinical multidrug-resistant (MDR) isolates, and the interaction of the EO with conventional antibiotics using a chequerboard assay (FICI); further, we investigated in silico molecular interactions with some targets related to resistance. Methods/Results: The EO, which was hydrodistilled and subsequently analyzed by GC–MS, is characterized by dominant limonene content (24.13%) and contents of oxygenated sesquiterpenes such as β-eudesmol (10.48%) and α-muurolol (8.10%). HPLC/UV–ESI–MS characterization of the extracts (decoction and Soxhlet) demonstrated that they were rich in polyphenolic compounds and flavonoids, which matched the standard phytochemical characteristics of this species. The extracts exhibited significant reducing capabilities, and the hydroethanolic extract exhibited the highest antioxidant activity (DPPH IC50 = 15.41 μg/mL; FRAP EC50 = 30.65 μg /mL), while the EO revealed at most moderate capacity in these tests. In antimicrobial assays, the EO inhibited fungi more effectively than the extracts (MIC of 1.17 mg/mL against Aspergillus niger; 4.69 mg/mL against Candida spp.), while antibacterial MICs for both the EO and extracts were generally high (up to 50 mg/mL). Combination testing nevertheless identified synergistic or additive effects of the EO with selected antibiotics, notably with ceftazidime against ESBL-producing Escherichia coli (FICI = 0.141) and Staphylococcus aureus (FICI = 0.039) and with amikacin against Klebsiella pneumoniae (FICI = 0.313); the EO–ceftriaxone pairing against ESBL E. coli was additive (FICI = 0.516). Docking simulations further supported these observations by showing the favorable predicted binding of oxygenated sesquiterpenes, most notably β-eudesmol and α-muurolol (up to −8.6 kcal/mol), to resistance-related targets such as RND efflux pumps, β-lactamases, and porins. Conclusions: Taken together, the in vitro and in silico data suggest that T. polium could be explored as a natural antimicrobial option and as an adjuvant to enhance antibiotic activity against multidrug-resistant pathogens. Full article
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20 pages, 6905 KB  
Article
Comparative Enzymology and Biomass Hydrolysis Reveal Industrial Biorefining Potential of Aspergillus fumigatus Strain VP2T
by Vaniksha Pal, Punam Vishwakarma, Dipayan Samanta, Priya Saxena, Rohit Rai and Rajesh K. Sani
Microorganisms 2026, 14(3), 723; https://doi.org/10.3390/microorganisms14030723 - 23 Mar 2026
Viewed by 275
Abstract
We report on the isolation and comprehensive genomic and biochemical characterization of Aspergillus fumigatus VP2T, a thermophilic filamentous fungus recovered from Himalayan Forest soil with exceptional lignocellulolytic capacity. Whole-genome sequencing revealed a 32.1 Mb genome encoding 12,675 predicted genes, including an extensive repertoire [...] Read more.
We report on the isolation and comprehensive genomic and biochemical characterization of Aspergillus fumigatus VP2T, a thermophilic filamentous fungus recovered from Himalayan Forest soil with exceptional lignocellulolytic capacity. Whole-genome sequencing revealed a 32.1 Mb genome encoding 12,675 predicted genes, including an extensive repertoire of >300 carbohydrate-active enzymes (CAZymes). Notably, the genome harbors multiple auxiliary activity enzymes, including AA9-family lytic polysaccharide monooxygenases and several cellobiose dehydrogenases (CDHs), supporting oxidative–hydrolytic synergism during biomass degradation. Submerged fermentation using a cellulose–wheat bran–rice straw substrate induced high enzyme titers, including 33 U/mL endoglucanase and 131 U/mL CDH, exceeding activities commonly reported for both native and engineered fungal strains. Although exoglucanase (0.02 U/mL) and xylanase (14.22 U/mL) activities were comparatively modest, the strain VP2T demonstrated superior hydrolysis of untreated rice straw, achieving a 1.89-fold increase in saccharification efficiency relative to the commercial enzyme cocktail Cellic® CTec2. Scanning electron microscopy confirmed extensive disruption of lignocellulosic architecture, consistent with enhanced enzyme accessibility and oxidative fiber loosening. Collectively, genomic evidence and functional assays identify A. fumigatus VP2T as a redox-optimized, moderately thermophilic biocatalyst suited for low-pH lignocellulose conversion. This study highlights the value of exploring thermophilic fungal biodiversity to discover native strains with inherent oxidative capacity, offering promising alternatives to pretreatment-intensive biorefinery processes and informing the rational development of tailored enzyme systems. Full article
(This article belongs to the Special Issue Advances in Aspergillus and Aspergillosis)
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44 pages, 1889 KB  
Review
Aspergillosis: An Update on Epidemiology, Risk Factors, Diagnosis, Susceptibility, and Treatment
by Carlos Alberto Castro-Fuentes, Juan Pablo Cabrera-Guerrero, Esperanza Duarte-Escalante, Graciela Hernández Silva, Alberto Chinney Herrera and María del Rocío Reyes-Montes
J. Fungi 2026, 12(3), 229; https://doi.org/10.3390/jof12030229 - 21 Mar 2026
Viewed by 830
Abstract
Aspergillosis is one of the most common fungal infections worldwide, caused by various species belonging to the genus Aspergillus, affecting both immunocompetent and immunocompromised individuals. The objective of this review was to provide an update on the last five years regarding various [...] Read more.
Aspergillosis is one of the most common fungal infections worldwide, caused by various species belonging to the genus Aspergillus, affecting both immunocompetent and immunocompromised individuals. The objective of this review was to provide an update on the last five years regarding various aspects of this mycosis, including epidemiology, risk factors, diagnosis, susceptibility, and treatment. The results showed that aspergillosis is distributed throughout the world. Furthermore, A. terreus was found to be an increasing causative agent in cases of aspergillosis, along with other less common species. Regarding clinical forms, particularly in the case of Allergic Bronchopulmonary Aspergillosis (ABPA), it is necessary to consider patients with structural lung impairment (Chronic Obstructive Pulmonary Disease (COPD) and Interstitial Lung Diseases). Meanwhile, newly identified risk factors for the development of aspergillosis include chronic obstructive pulmonary disease (odds ratio 1.88) and interstitial lung disease (OR 3.71). Furthermore, the main diagnostic methodologies for aspergillosis were polymerase chain reaction (PCR), matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF), and next-generation sequencing (NGS). Additionally, the usefulness of isavuconazole compared to voriconazole was demonstrated, representing a better alternative for the treatment of aspergillosis, while novel antifungals such as olorofim and fosmanogepix show excellent results in the management of aspergillosis. Due to the discovery of new risk factors, coupled with antifungal resistance in Aspergillus spp. and the wide variety of diagnostic tools, individualized assessment of aspergillosis cases is necessary for the appropriate management of this mycosis. Full article
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27 pages, 4483 KB  
Article
Development and Assessment of Heavy Oil-Degrading Fungal Consortia (Aspergillus and Alternaria) for Soil Bioremediation
by Shujuan Peng, Junhao Zhu, Weiguo Liu and Junhui Zhang
J. Fungi 2026, 12(3), 224; https://doi.org/10.3390/jof12030224 - 19 Mar 2026
Viewed by 460
Abstract
Leveraging fungal consortia to degrade heavy oil is an emerging strategy for mitigating/cleaning up environmental pollution. However, many consortia are predominantly evaluated by measuring the biodegradation efficiency of heavy oil, with insufficient attention paid to the mechanistic underpinnings and metabolic pathways. In this [...] Read more.
Leveraging fungal consortia to degrade heavy oil is an emerging strategy for mitigating/cleaning up environmental pollution. However, many consortia are predominantly evaluated by measuring the biodegradation efficiency of heavy oil, with insufficient attention paid to the mechanistic underpinnings and metabolic pathways. In this study, heavy oil-degrading fungal consortia were developed for potential application in soil bioremediation. Whole-genome sequencing was used to predict the metabolic pathways and interspecific interactions driving heavy oil biodegradation. Three heavy oil-degrading fungal strains, designated Aspergillus corrugatus FH2, Aspergillus terreus FL4, and Alternaria alstroemeriae FW1, were isolated from oil sludge in the Karamay Oilfield in Xinjiang, China. Four consortia were constructed through the combination of two or three strains. The consortium F13 (FH2 + FW1) achieved 72.0% removal of heavy oil in a simulated bioremediation test over 30 days, which was more efficient than other consortia and single strains (59.5–68.5%). Notably, the mean degradation rate of long-chain alkanes (C24–C28) by F13 reached 95.9%. After F13 treatment, the major fractions of heavy oil showed considerable degradation, 87.4% for saturates, 92.0% for aromatics, 69.5% for resins, and 27.3% for asphaltenes. Genome annotation of FH2, FL4, and FW1 revealed the presence of core genes for degradation of n-alkanes and aromatics, e.g., CYP505, frmA, fadB, hmgA, ALDH, and ACSL. These functional genes encoded cross-lineage enzymes, enabling synergistic catabolism of C13–C28 alkanes and aromatics. Our findings indicated that the fungal consortium of A. corrugatus FH2 and Al. alstroemeriae FW1 has remarkable bioremediation potential for heavy oil-contaminated sites. This study provides molecular evidence for the design of targeted interventions to improve soil remediation efficiency with fungal consortia. Full article
(This article belongs to the Section Environmental and Ecological Interactions of Fungi)
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25 pages, 4718 KB  
Article
Design and Biological Profiling of a Drug-like Chloropyridine Diamine as a Dual Antioxidant–Antimicrobial Lead: In Vitro Evaluation and In Silico Multi-Target Studies
by Oussama Merzouki, Elhachmia Ech-chihbi, Nadia Arrousse, El Houssine Mabrouk, Mohamed Hefnawy, Yasmine Fernine, Manal El-Gendy and Mustapha Taleb
Int. J. Mol. Sci. 2026, 27(6), 2777; https://doi.org/10.3390/ijms27062777 - 19 Mar 2026
Viewed by 215
Abstract
Bacterial and fungal infections, together with oxidative stress-mediated damage, remain major challenges in human health and in the protection of materials, highlighting the need for new multifunctional molecules that combine antioxidant and antimicrobial properties. In this context, a new chloropyridine-based derivative, N4,N4-bis((6-chloropyridin-3-yl)methyl)-N1,N1-diethylpentane-1,4-diamine (AMZ), [...] Read more.
Bacterial and fungal infections, together with oxidative stress-mediated damage, remain major challenges in human health and in the protection of materials, highlighting the need for new multifunctional molecules that combine antioxidant and antimicrobial properties. In this context, a new chloropyridine-based derivative, N4,N4-bis((6-chloropyridin-3-yl)methyl)-N1,N1-diethylpentane-1,4-diamine (AMZ), was synthesized via a simple, catalyst-free N-alkylation of N1,N1-diethylpentane-1,4-diamine with 2-chloro-4-(chloromethyl)pyridine in acetonitrile at 55 °C, affording a 62% yield. The structure of AMZ was confirmed by melting point determination, 1H and 13C NMR spectroscopy, and EI–MS analysis. Its antioxidant activity was evaluated using DPPH and FRAP assays with BHT as a reference standard, while antibacterial and antifungal activities were assessed via disk diffusion and microdilution methods to determine inhibition zones and MIC/MBC values. In silico investigations included drug-likeness and ADMET predictions, as well as molecular docking on catalase (PDB: 2CAG) and fungal CYP51 (PDB: 1EA1). AMZ exhibited dose-dependent radical scavenging in the DPPH assay, reaching 76.88 ± 3.20% inhibition at 1000 µg/mL, with an EC50 of 26.03 ± 0.21 µg/mL, close to that of BHT (23.65 ± 0.22 µg/mL). In the FRAP assay, AMZ showed a higher reducing power than BHT at a low concentration (OD50 µg/mL 0.177 ± 0.023 vs. 0.134 ± 0.017), although its FRAP EC50 was higher (700.48 ± 22.54 vs. 400.16 ± 8.67 µg/mL). AMZ displayed broad-spectrum antimicrobial activity against Gram-positive and Gram-negative bacteria and fungi, with particularly strong effects on Bacillus subtilis (44.5 ± 0.5 mm; MIC/MBC 0.008 mg/mL) and Aspergillus niger (30 mm; MIC/MBC 0.030 mg/mL), in some cases comparable or superior to streptomycin and fluconazole. In silico analysis indicated that AMZ fulfilled major drug-likeness rules, showed high predicted intestinal absorption (91.14%), and was classified as non-AMES toxic, while docking predicted favorable binding to catalase and CYP51, in agreement with the experimental antioxidant and antifungal activities. These findings highlight the potential of AMZ as a multi-target pyridine-based lead compound that warrants further structural optimization and in vivo evaluation for applications in oxidative-stress-related and infectious conditions. Full article
(This article belongs to the Section Molecular Pharmacology)
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29 pages, 2352 KB  
Review
Fermented Soybean Meal and Its Application in Animal Husbandry: A Review
by Lina Tokuna Mulalapele, Lei Xu, Dongxu Ming, Yanpin Li, Wenjuan Sun, Xilong Li and Yu Pi
Microorganisms 2026, 14(3), 691; https://doi.org/10.3390/microorganisms14030691 - 19 Mar 2026
Viewed by 324
Abstract
Soybean meal (SBM) is a foundational protein source, but its industrial application is constrained by a complex matrix of anti-nutritional factors (ANFs). This review provides a critical synthesis of the biochemical transition from raw SBM to fermented SBM (FSBM), focusing on the synergistic [...] Read more.
Soybean meal (SBM) is a foundational protein source, but its industrial application is constrained by a complex matrix of anti-nutritional factors (ANFs). This review provides a critical synthesis of the biochemical transition from raw SBM to fermented SBM (FSBM), focusing on the synergistic mechanisms of fungal and bacterial co-fermentation. We identify that the efficacy of FSBM is primarily driven by the microbial proteolysis of glycinin into low-molecular-weight bioactive peptides (<1000 Da). These peptides serve as the primary drivers for improved intestinal morphology (increased villus height) and the modulation of the gut microbiota, providing a mechanistic basis for reported probiotic effects. Furthermore, we establish that the 5–10% improvement in the feed conversion ratio (FCR) documented for swines mathematically offsets the processing premium of fermentation. However, critical gaps remain in the standardization of solid-state fermentation (SSF) protocols, specifically regarding the selection of fungal (Aspergillus) and bacterial (Bacillus or Lactobacillus) strains, whose distinct metabolic pathways significantly diversify the functional profile of the resulting FSBM. Full article
(This article belongs to the Special Issue Dietary and Animal Gut Microbiota)
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41 pages, 2311 KB  
Review
Keratinolytic Fungi for Poultry Feather Waste Valorization: Mechanisms, Biotechnological Applications, Economic Feasibility, and Future Perspectives
by B. Lokeshwari, P. Saranraj, Hawraa F. H. Al-Abedi, Semaa F. H. Al-Abedi, Haider H. E. Al-Magsoosi, Mohammed T. Jaafar, Israa M. Essa, Hasanain A. J. Gharban, K. Gayathri and Alexander Machado Cardoso
Resources 2026, 15(3), 46; https://doi.org/10.3390/resources15030046 - 18 Mar 2026
Viewed by 395
Abstract
The rapid expansion of the poultry industry has led to the large-scale generation of feather waste, creating serious environmental and public health concerns due to the recalcitrant nature of keratin. Poultry feathers are composed mainly of highly cross-linked keratin proteins stabilized by numerous [...] Read more.
The rapid expansion of the poultry industry has led to the large-scale generation of feather waste, creating serious environmental and public health concerns due to the recalcitrant nature of keratin. Poultry feathers are composed mainly of highly cross-linked keratin proteins stabilized by numerous disulfide bonds, which confer resistance to conventional proteolytic enzymes and natural degradation processes. This review examines the potential of keratinolytic fungi and their enzymes as sustainable, eco-friendly, and value-added strategies for poultry feather waste management and resource recovery. It discusses the environmental and health risks associated with improper feather disposal, such as pathogen proliferation, odor generation, and ecosystem contamination. Conventional management approaches, steam pressure hydrolysis, mechanical grinding, thermal treatment, acid–alkali hydrolysis, and oxidation, are critically evaluated in terms of efficiency and environmental impact. The review further highlights biological degradation pathways mediated by keratinolytic fungi and enzymes, with emphasis on fungal genera such as Aspergillus and Chrysosporium. Key mechanisms of fungal keratin degradation, including sulfitolysis, proteolysis, deamination, hyphal penetration, enzyme secretion, and biofilm formation, are discussed. Finally, industrial, agricultural, and feed applications of keratinases, along with advances in strain improvement, omics technologies, synthetic biology, and associated biosafety and regulatory considerations, are addressed. Full article
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11 pages, 223 KB  
Article
Incidence and Outcomes of Invasive Aspergillosis in Hospitalized Patients with Pancreatic Transplantation: A Nationwide Population-Based Analysis
by Aditya Sharma, Marc Piper, Rahul Maheshwari and Ayman O. Soubani
Microorganisms 2026, 14(3), 669; https://doi.org/10.3390/microorganisms14030669 - 16 Mar 2026
Viewed by 293
Abstract
Background: Invasive Aspergillosis (IA) is a rare but life-threatening fungal infection in immunocompromised hosts, including solid organ transplant (SOT) recipients. While extensively studied in other SOT populations, data on IA in pancreas transplant (PT) recipients are limited. Earlier studies reported mortality rates nearing [...] Read more.
Background: Invasive Aspergillosis (IA) is a rare but life-threatening fungal infection in immunocompromised hosts, including solid organ transplant (SOT) recipients. While extensively studied in other SOT populations, data on IA in pancreas transplant (PT) recipients are limited. Earlier studies reported mortality rates nearing 100%, whereas more recent data show that 12-week mortality still exceeds 20% despite improvements in antifungal therapy. Current prophylaxis strategies for PT recipients mainly focus on Candida species, and there are no clear, standardized recommendations for Aspergillus prevention. Given the paucity of focused data, the epidemiology, clinical characteristics, and outcomes of IA in PT recipients are not well defined. This study aimed to assess the incidence, clinical characteristics, and outcomes of IA among hospitalized PT patients using a nationally representative dataset. Methods: We conducted a descriptive analysis using the National Inpatient Sample (NIS) from 2016 to 2020. PT admissions were identified using International Classification of Diseases, Tenth Revision (ICD 10) codes for transplant status and procedures. IA was defined using validated ICD 10 codes. Baseline demographics, hospital characteristics, comorbidities, and outcomes, including sepsis, acute kidney injury (AKI), acute respiratory failure (ARF), invasive mechanical ventilation (IMV), all-cause in-hospital mortality, length of stay, and total hospitalization costs and charges were compared between PT admissions with and without IA. National estimates were calculated using discharge weights, and comparisons were performed using the chi-square test and adjusted Wald test. Multivariable analysis was performed to identify predictors of all-cause in-hospital mortality among PT admissions complicated by IA. Two-sided p values < 0.05 were considered statistically significant. Results: Between 2016 and 2020, 65,980 PT-related hospitalizations were identified, of which 250 (0.4%) had IA. PT admissions complicated by IA were more commonly aged 41 to 60 years (59% vs. 46%, p = 0.012) and were less likely to have a Charlson Comorbidity Index greater than 3 (54% vs. 68.6%, p < 0.001) compared with PT hospitalizations without IA. The PT with the IA cohort had higher rates of sepsis (100% vs. 46.1%, p < 0.001), AKI (60% vs. 36.7%, p < 0.001), ARF (28% vs. 9.4%, p < 0.001), and IMV use (18% vs. 4%, p < 0.001) compared with the PT without the IA cohort. Among PT hospitalizations with IA, IMV use was independently associated with higher all-cause in-hospital mortality (adjusted odds ratio 48.777, p = 0.009). Overall, in-hospital mortality was significantly higher in PT hospitalizations with IA compared with those without IA (12% vs. 2%, p < 0.001). Mean length of stay was longer (24.86 vs. 6.13 days, p < 0.001), and total charges ($378,494 vs. $94,938, p < 0.001), and total costs ($93,019 vs. $24,463, p = 0.023) were significantly higher compared with PT hospitalizations without IA. Conclusion: Although rare, IA in PT recipients is associated with higher rates of sepsis, AKI, ARF, venous thromboembolism, prolonged hospitalization, increased mortality, and greater healthcare utilization. Despite the inherent limitations of administrative datasets, this nationally representative analysis highlights the substantial clinical and economic burden of IA in this high-risk population. These findings emphasize the need for targeted surveillance, early diagnosis, and evidence-based antifungal strategies in this vulnerable population. Full article
(This article belongs to the Special Issue Fungal Infections and Antifungal Agents)
15 pages, 1030 KB  
Article
New Cyclopeptides and Curvularins from Marine-Derived Fungal-Bacterial Symbiont Aspergillus spelaeus GXIMD 04541/Sphingomonas echinoides GXIMD 04532
by Fei-Hua Yao, Jie Yang, Xiao-Yan Li, Shu-Fen Xu, Kai Liu, Zhen-Zhou Tang, Wei-Hui Li, Yong-Hong Liu, Xiang-Xi Yi and Cheng-Hai Gao
Mar. Drugs 2026, 24(3), 111; https://doi.org/10.3390/md24030111 - 15 Mar 2026
Viewed by 380
Abstract
Three new cyclic tetrapeptides (nectriatidels A-C, 13), two new curvularin analogs (6 and 7), and four known compounds (4 and 5, 8 and 9) were isolated from the marine-derived fungal-bacterial symbiont Aspergillus spelaeus GXIMD 04541/ [...] Read more.
Three new cyclic tetrapeptides (nectriatidels A-C, 13), two new curvularin analogs (6 and 7), and four known compounds (4 and 5, 8 and 9) were isolated from the marine-derived fungal-bacterial symbiont Aspergillus spelaeus GXIMD 04541/Sphingomonas echinoides GXIMD 04532, which was obtained from Mauritia arabica in shallow coastal waters. Their structures were elucidated through NMR spectroscopy and HRESIMS, and their absolute configurations were determined by Marfey’s method and quantum chemical calculations. Compounds 15 showed moderate amphotericin B (AmB)-potentiating activity against Candida albicans. Compounds 7 and 8 exhibited significant activities against Mycobacterium tuberculosis, with MIC values of 32 and 16 μg/mL, respectively. Additionally, compounds 7 and 8 exhibited moderate cytotoxicity against human colorectal cancer cell lines DLD-1 and SW480, with IC50 values of 25~36 μM. Whole-genome sequencing of A. spelaeus revealed a 35.91 Mb assembly encoding 106 biosynthetic gene clusters (BGCs). antiSMASH analysis revealed that 79 of these BGCs (74.5%) displayed no significant similarity to known pathways in the MIBiG database, which is dominated by hybrid clusters, terpene, T1PKS, NRPS, and NRPS-like types. Genomic analysis identified the putative biosynthetic gene clusters for these metabolites and confirmed the fungal host as the predominant producer. Full article
(This article belongs to the Special Issue Bioactivities of Coastal Organism-Derived Marine Natural Products)
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