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2.
J Microbiol Methods ; 191: 106348, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34699864

RESUMO

Neonothopanus gardneri, also known as coconut flower mushroom (flor-de-coco), is a Brazilian bioluminescent basidiomycete found in Palm Forest, a transitional biome between the Amazonian Forest and Caatinga (Savanna-like vegetation) in Northeast Brazil, especially in Piauí State. Recent advances toward the elucidation of fungal bioluminescence have contributed to the discovery of four genes (hisps, h3h, luz and cph) involved with the bioluminescence process, the so-called Caffeic Acid Cycle (CAC) and to develop biotechnological applications such autoluminescent tobacco plants and luciferase-based reporter genes. High-yield and -quality RNA-extraction methods are required for most of these purposes. Herein, four methods for RNA isolation from the mycelium of N. gardneri were evaluated: RNeasy® kit (QIAGEN), TRI+, TRI18G+, and TRI26G+. Highest RNA yield was observed for TRI18G+ and TRI26G+ methods, an increase of ~130% in comparison to the RNeasy® method and of ~40% to the TRI+ protocol. All the RNA samples showed good purity and integrity, except by gDNA contamination in RNA samples produced with the RNeasy® method. High quality of RNA samples was confirmed by successful cDNA synthesis and PCR amplification of the coding sequence of h3h gene, responsible for the hydroxylation of the precursor of fungal luciferin (3-hydroxyhispidin). Similarly, RT-qPCR amplification of ef-tu gene, related to the protein biosynthesis in the cell, was demonstrated from RNA samples. This is the first report of a reproducible, time-saving and low-cost optimized method for isolation of high-quality and -yield, DNA-free RNA from a bioluminescent fungus, but that can also be useful for other basidiomycetes.


Assuntos
Agaricales/genética , Medições Luminescentes/métodos , Micélio/genética , Técnicas de Tipagem Micológica/métodos , RNA Fúngico/isolamento & purificação , Agaricales/isolamento & purificação , Agaricales/metabolismo , Biotecnologia , Brasil , DNA Complementar , Ecossistema , Florestas , Luciferinas , Tipagem Molecular/métodos , Reação em Cadeia da Polimerase , Biossíntese de Proteínas
3.
Biotechnol Lett ; 43(4): 845-854, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33389270

RESUMO

The aim of this study was to characterize the growth of the fungus Leucoagaricus gongylophorus LEU18496, isolated from the fungus garden of the nest of leaf cutter ants Atta mexicana. The fungus garden was cultivated in an artificial laboratory nest and the fungus further grown in submerged (SmC) and solid state (SSC) cultures with sugarcane bagasse, grass or model substrates containing CM-cellulose, xylan or lignin. The CO2 production rate with grass in SmC (Vmax 34.76 mg CO2 Lgas-1 day- 1) was almost four times than SSC (Vmax 9.49 mg CO2 Lgas-1 day- 1), while the production rate obtained in sugarcane bagasse in SmC (Vmax 16.02 mg CO2 Lgas-1 day- 1) was almost three times than that for SSC (Vmax 5.42 mg CO2 Lgas-1 day- 1). In addition, the fungus grew with defined carbon substrates mixtures in SmC, but at different rates, first xylan, followed by CM-cellulose and lignin. Endoglucanase and xylanase activities (U mgprotein-1) were detected in all cultures, the specific activity was higher in the fungus-garden, 5.2 and 1.8; followed by SSC-grass, 1.5 and 0.8, and SSC-bagasse, 0.9 and 0.8, respectively. Laccase activity in the fungus-garden was 44.8 U L- 1 and 10.9 U L- 1 in the SSC-grass. The gongylidia structures observed by environmental scanning electron microscopy were ca. 40 µm and the hyphae width ca. 5 µm. The results show that L. gongylophorus from A. mexicana have promising applications for the treatment of plant residues to release fermentable sugars and the production of high value lignocellulolytic enzymes such as endoglucanase, xylanase or laccases.


Assuntos
Agaricales/crescimento & desenvolvimento , Formigas/microbiologia , Celulase/metabolismo , Endo-1,4-beta-Xilanases/metabolismo , Lignina/metabolismo , Agaricales/enzimologia , Agaricales/isolamento & purificação , Animais , Celulose/química , Cromatografia Gasosa , Fermentação , Proteínas Fúngicas/metabolismo , Regulação Enzimológica da Expressão Gênica , Regulação Fúngica da Expressão Gênica , Microscopia Eletrônica de Varredura , Folhas de Planta/parasitologia
4.
Mycologia ; 113(1): 168-190, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33175671

RESUMO

Four epitypes and three new species of Amanita (Amanitaceae, Agaricales, Agaricomycetes, Basidiomycota) are described from Guineo-Congolian rainforests of Cameroon. Amanita echinulata, A. fulvopulverulenta, A. robusta, and A. bingensis are epitypified based on collections that are the first since the species were described nearly a century ago. Morphological features of the epitypes are described and enumerated. Amanita minima, Amanita luteolamellata, and A. goossensfontanae are described as new and added to the known macromycota of tropical Africa. Habit, habitat, and known distribution are provided for each species. Sequence data for the internal transcribed spacer (ITS) locus are provided for types and other collections of all taxa, and a molecular phylogenetic analysis across the genus Amanita corroborates morphology-based infrageneric placement for each.


Assuntos
Amanita , Classificação , Agaricales/classificação , Agaricales/genética , Agaricales/isolamento & purificação , Amanita/classificação , Amanita/genética , Amanita/isolamento & purificação , Camarões , DNA Espaçador Ribossômico/genética , Ecossistema , Genes Fúngicos , Filogenia , Floresta Úmida
5.
Mycologia ; 113(1): 33-42, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33337985

RESUMO

Phlebopus roseus is described as new based on collections from southwest China. Phylogenetic analyses of nuclear rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS) and portions of nuclear 28S rDNA (28S), translation elongation factor 1-alpha (tef1), and the largest and second largest subunits of RNA polymerase II (rpb1, rpb2) support P. roseus as a novel species in the genus Phlebopus (Boletinellaceae, Boletales). The new species resembles P. portentosus but differs from it in that mature basidiomata have a bright rose-red-colored stipe and a radiate tubular hymenophore with nested pores. Despite extensive searching, P. roseus has only been found at four sites within a 24-hectare orchard dominated by Eriobotrya japonica, which is agriculturally important given its fruit production (loquats). Therefore, this species appears to be endemic and geographically restricted. The ecology of this bolete is also unique. In line with the trophic behavior of other species in the Boletinellaceae, our observations indicate that P. roseus forms a symbiotic association with the scale insect Coccus hesperidum, identified through sequence analysis of its mitochondrial cytochrome c oxidase subunit I (COI) region, to form fungus-insect galls that develop on roots of E. japonica trees. Phlebopus roseus is an edible mushroom species and is collected from the type location by farmers and sold commercially in limited quantities at local markets alongside P. portentosus and other fungi.


Assuntos
Basidiomycota , Agaricales/classificação , Agaricales/genética , Agaricales/isolamento & purificação , Animais , Basidiomycota/classificação , Basidiomycota/genética , Basidiomycota/isolamento & purificação , China , Classificação , DNA Fúngico/genética , Eriobotrya/microbiologia , Hemípteros , Fator 1 de Elongação de Peptídeos/genética , Raízes de Plantas/microbiologia , Tumores de Planta/microbiologia , RNA Polimerase II/genética , RNA Ribossômico 28S/genética , Simbiose
6.
BMJ Case Rep ; 13(12)2020 Dec 28.
Artigo em Inglês | MEDLINE | ID: mdl-33372014

RESUMO

A 44-year-old Asian Indian woman presented with a history of pain and redness in the left eye for 3 weeks. Scleral congestion with a nodular swelling was present inferotemporally. Raised C reactive protein and positive antinuclear and perinuclear antineutrophil cytoplasmic antibodies suggested autoimmune scleritis. The patient was therefore managed with corticosteroids. Nevertheless, the development of severe pain associated with a scleral abscess led to a revised diagnosis of infectious scleritis. Corticosteroids therapy was halted and urgent debridement was performed. Microbiology confirmed fungal scleritis due to Coprinopsis cinerea Multiple full-thickness circumferential debridements with antifungal therapy resulted in satisfactory anatomical and visual outcomes. This case presented a unique challenge, since laboratory results were misleading, and corticosteroids resulted in a fulminant clinical course. Therefore, aggressive circumferential debridement was performed to achieve the elimination of a rare fungal aetiology of scleritis, which has not been reported previously to cause human infection.


Assuntos
Agaricales/isolamento & purificação , Infecções Oculares Fúngicas/microbiologia , Infecções Oculares Fúngicas/cirurgia , Esclerite/microbiologia , Esclerite/cirurgia , Corticosteroides/efeitos adversos , Corticosteroides/uso terapêutico , Adulto , Antifúngicos/uso terapêutico , Diagnóstico Diferencial , Progressão da Doença , Infecções Oculares Fúngicas/tratamento farmacológico , Dor Ocular/microbiologia , Feminino , Humanos , Esclerite/tratamento farmacológico , Sulfonamidas/uso terapêutico , Tiofenos/uso terapêutico , Timolol/uso terapêutico
7.
BMC Infect Dis ; 20(1): 945, 2020 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-33308180

RESUMO

BACKGROUND: Filamentous basidiomycetes are mainly considered to be respiratory tract colonizers but the clinical significance of their isolation in a specimen is debatable. Hormographiella aspergillata was first reported as a human pathogen in 1971. We discuss the role of this mold as a pathogen or colonizer and give an update on diagnostic tools and in vitro antifungal susceptibility. CASE PRESENTATION: We identified three cases of H. aspergillata with respiratory symptoms in a short period of time. One invasive infection and two colonizations were diagnosed. Culture supernatants showed that H. aspergillata can produce galactomannan and ß-D-glucan but not glucuronoxylomannan. For the first time, isavuconazole susceptibility was determined and high minimum inhibitory concentrations (MICs) were found. Liposomal amphotericin B and voriconazole have the lowest MICs. CONCLUSION: To date, 22 invasive infections involving H. aspergillata have been reported. On isolation of H. aspergillata, its pathogenic potential in clinical settings can be tricky. Molecular identification and antifungal susceptibility testing are essential considering high resistance against several antifungal therapies.


Assuntos
Agaricales/genética , Anfotericina B/administração & dosagem , Antifúngicos/administração & dosagem , Pneumopatias Fúngicas/diagnóstico , Adulto , Agaricales/isolamento & purificação , Idoso , Evolução Fatal , Feminino , Humanos , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Resultado do Tratamento
8.
Mycologia ; 112(6): 1086-1103, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32897841

RESUMO

In tropical and subtropical rainforests, vegetative fungal rhizomorphs from the Marasmiineae are routinely used as construction material in bird nests. Because rhizomorphs seldom produce mushrooms within nests, the fungal species involved remain largely unknown. In turn, this limitation has prevented us from resolving broader questions such as whether specific fungal species are selected by birds for different functional roles (i.e., attachment, or parasite control). To fill some of these gaps, we collected 74 rhizomorph-containing bird nests from the Neo- and Afrotropics and used nuc rDNA internal transcribed spacer ITS1-5.8S-ITS2 (ITS) sequences to discriminate between rhizomorph-forming species. In total we recovered 25 Marasmiineae species used by birds in nest construction, none of which were shared between the Neotropics and the Afrotropics. We also collected Marasmiineae basidiomes in the vicinity of nests and used ITS sequences to match these sporulating morphs with nest rhizomorphs for nine species. Basidiomes from an additional five species were found fruiting from rhizomorphs incorporated within bird nests. Finally, an additional six species were putatively identified based on publicly available sequence data. Rhizomorphs of five species were found to be utilized almost exclusively as lining material in nests. Lining material comes in direct contact with nestlings and is hypothesized to play a role in parasite control. Rhizomorphs from 10 species were used to attach and anchor nests to substrates; we matched six of those to fruiting litter trap-forming species collected in the understory. Litter traps hold large quantities of fallen litter material, suggesting that birds may preferentially use rhizomorphs that are adapted to bearing heavy loads for nest attachment. Finally, we describe two species of Marasmius-M. neocrinis-equi, sp. nov., and M. nidus-avis, sp. nov.-that are commonly found associated with bird nests and show that rhizomorph production is common across the genus.


Assuntos
Agaricales/classificação , Agaricales/genética , Aves , Variação Genética , Clima Tropical , Agaricales/isolamento & purificação , Animais , Comportamento de Nidação
9.
Int J Med Mushrooms ; 22(5): 501-507, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32749104

RESUMO

Panus lecomtei is emerging as an edible mushroom found worldwide and particularly in the Northern Hemisphere. The mushroom contains a substantial amount of useful nutritional and medicinal compounds. In the present study, we have examined a specimen of P. lecomtei submitted to the ICAR-Directorate of Mushroom Research gene bank. The specimen was examined for taxonomical characters using classical and molecular tools. Attempts were made for cultivation of this mushroom under controlled conditions using sawdust-based substrate. The specimen was characterized by its purplish fruiting body having coarse, rigid, dense hairs on the cap, pubescent stipe, and abundant metuloids. Molecular identification through conserved ITS region was done and the sequence was deposited in NCBI GenBank under accession number MN332200. Nutritional profiling and biochemical analysis showed that the mushroom contained high carbohydrate but low fat contents. The mushroom showed the presence of phenolics, ß-carotene, and lycopene. The analysis also showed substantial antioxidant properties in the mushroom. The findings presented herein point out that P. lecomtei can be used as a potential edible mushroom for diversification of mushroom production in India.


Assuntos
Polyporales , Agaricales/química , Agaricales/genética , Agaricales/isolamento & purificação , Antioxidantes/química , Classificação , DNA Espaçador Ribossômico/genética , Carpóforos/química , Carpóforos/crescimento & desenvolvimento , Carpóforos/ultraestrutura , Genes Fúngicos , Índia , Licopeno/análise , Licopeno/isolamento & purificação , Microscopia Eletrônica de Varredura , Fenóis/análise , Fenóis/isolamento & purificação , Filogenia , Polyporales/química , Polyporales/genética , Polyporales/crescimento & desenvolvimento , Polyporales/isolamento & purificação , beta Caroteno/análise , beta Caroteno/isolamento & purificação
10.
BMC Microbiol ; 20(1): 266, 2020 08 26.
Artigo em Inglês | MEDLINE | ID: mdl-32847512

RESUMO

BACKGROUND: Atrazine is one of the most widespread chlorinated herbicides, leaving large bulks in soils and groundwater. The biodegradation of atrazine by bacteria is well described, but many aspects of the fungal metabolism of this compound remain unclear. Thus, we investigated the toxicity and degradation of atrazine by 13 rainforest basidiomycete strains. RESULTS: In liquid medium, Pluteus cubensis SXS320, Gloelophyllum striatum MCA7, and Agaricales MCA17 removed 30, 37, and 38%, respectively, of initial 25 mg L- 1 of the herbicide within 20 days. Deficiency of nitrogen drove atrazine degradation by Pluteus cubensis SXS320; this strain removed 30% of atrazine within 20 days in a culture medium with 2.5 mM of N, raising three metabolites; in a medium with 25 mM of N, only 21% of initial atrazine were removed after 40 days, and two metabolites appeared in culture extracts. This is the first report of such different outcomes linked to nitrogen availability during the biodegradation of atrazine by basidiomycetes. The herbicide also induced synthesis and secretion of extracellular laccases by Datronia caperata MCA5, Pycnoporus sanguineus MCA16, and Polyporus tenuiculus MCA11. Laccase levels produced by of P. tenuiculus MCA11 were 13.3-fold superior in the contaminated medium than in control; the possible role of this enzyme on atrazine biodegradation was evaluated, considering the strong induction and the removal of 13.9% of the herbicide in vivo. Although 88% of initial laccase activity remained after 6 h, no evidence of in vitro degradation was observed, even though ABTS was present as mediator. CONCLUSIONS: This study revealed a high potential for atrazine biodegradation among tropical basidiomycete strains. Further investigations, focusing on less explored ligninolytic enzymes and cell-bound mechanisms, could enlighten key aspects of the atrazine fungal metabolism and the role of the nitrogen in the process.


Assuntos
Agaricales/efeitos dos fármacos , Agaricales/metabolismo , Atrazina/metabolismo , Lacase/metabolismo , Agaricales/crescimento & desenvolvimento , Agaricales/isolamento & purificação , Atrazina/farmacologia , Biodegradação Ambiental , Meios de Cultura , Poluentes Ambientais/metabolismo , Matriz Extracelular/enzimologia , Proteínas Fúngicas/metabolismo , Nitrogênio/metabolismo , Polyporaceae/efeitos dos fármacos , Polyporaceae/metabolismo , Floresta Úmida , Especificidade da Espécie
11.
Emerg Microbes Infect ; 9(1): 1114-1122, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32475225

RESUMO

Filamentous basidiomycetes are uncommon agents of human diseases, despite their ubiquitous presence in the environment. We present a case of symptomatic pulmonary infection in a 38-year-old male with cough and fever; a thin-walled cyst in the posterior left upper pulmonary lobe was revealed by radiography. A non-sporulating fungus was isolated from sputum and biopsy material from the cyst. ITS and LSU sequences placed the fungus phylogenetically in Agaricales, family Cyphellaceae, and identified it as a member of shelf fungi in Gloeostereum, but without identity to any known species. The new species is described as Gloeostereum cimri. The clinical strain showed high MIC to voriconazole (>8 µg/ml) but had low MIC to amphotericin B (0.5 µg/ml).


Assuntos
Agaricales/genética , Agaricales/isolamento & purificação , Cistos/microbiologia , Infecções Respiratórias/microbiologia , Escarro/microbiologia , Adulto , Agaricales/efeitos dos fármacos , Antifúngicos/farmacologia , Antifúngicos/uso terapêutico , Biópsia , Cistos/patologia , Humanos , Pulmão/microbiologia , Pulmão/patologia , Masculino , Testes de Sensibilidade Microbiana , Micoses/diagnóstico por imagem , Micoses/tratamento farmacológico , Infecções Respiratórias/diagnóstico por imagem , Tórax/diagnóstico por imagem , Tomografia
12.
Mycologia ; 112(2): 371-399, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32119635

RESUMO

Within the family Entolomataceae, many reports of Entoloma and Rhodocybe have been published, but few reports on Clitopilus and allied genera are available. In this study, Clitopilus, Clitocella, and Clitopilopsis from China were studied by morphological and phylogenetic methods. Portions of nuc 28S rDNA (28S), RNA polymerase II second largest subunit (rpb2), translation elongation factor 1-alpha (tef1), and ATPase subunit 6 (atp6), were employed to elucidate the relationships of Clitopilus and allies. Results indicate that Clitopilus should be divided into three sections, namely, sect. Clitopilus, sect. Scyphoides, and sect. Crispi, the last of which is newly described. In total, 17 species of Clitopilus, Clitocella, and Clitopilopsis are found in China; 14 species belong to Clitopilus, of which 5 are new: C. yunnanensis, C. brunniceps, C. rugosiceps, C. sinoapalus, and C. umbilicatus. Two species of Clitocella, including one new species, Clitocella orientalis, are described. One new species of Clitopilopsis, namely, Clitopilopsis albida, is proposed.


Assuntos
Agaricales/classificação , Agaricales/citologia , Agaricales/genética , Agaricales/isolamento & purificação , China , Genes Fúngicos , Tipagem de Sequências Multilocus , Filogenia
13.
Mycologia ; 112(2): 438-452, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32074023

RESUMO

This study describes four gray or brown species of Cuphophyllus (Hygrophoraceae, Agaricales), two of them new species, restricted to arctic-alpine and northern boreal zones of North America, and relates them morphologically and phylogenetically using multigene and nuc rDNA internal transcribed spacer ITS1-5.8S-ITS (ITS barcode) analyses to their similar, known counterparts. Cuphophyllus cinerellus, epitypified here, is shown to be a pan-palearctic species with sequence-confirmed collections from Fennoscandia and easternmost Asia. Occupying a similar habitat in the Nearctic is its sister species, the morphologically similar but novel C. esteriae, so far known only from eastern North America, including Greenland. Sister to the C. cinerellus-C. esteriae lineage, and known only from boreal raised Sphagnum bogs in Newfoundland, is a new medium-sized light cinereous brown species, C. lamarum. It has a yellow stipe but is phylogenetically distant from the yellow-stiped European C. flavipes and its North American sister species, Hygrophorus pseudopallidus. As cryptic speciation was discovered within C. flavipes, we lecto- and epitypify the name and transfer H. pseudopallidus to Cuphophyllus based on ITS analysis of the holotype. We also transfer the small European Hygrocybe comosa to Cuphophyllus based on morphology. Cuphophyllus hygrocyboides is reported from North America with the first sequence-confirmed collections from arctic-alpine British Columbia and Greenland. In addition, sequencing the holotype of C. subviolaceus identifies it as the sister species to the putative C. lacmus. Both species seem to have an intercontinental distribution. In total, we add new sequences to GenBank from 37 Cuphophyllus collections, including the holotypes of C. hygrocyboides and C. subviolaceus, the two new epitypes, and the two novel species.


Assuntos
Agaricales/classificação , Classificação/métodos , Agaricales/citologia , Agaricales/genética , Agaricales/isolamento & purificação , Regiões Árticas , Carpóforos , Genes Fúngicos , Tipagem de Sequências Multilocus , Micorrizas , América do Norte , Plantago/microbiologia , Especificidade da Espécie , Esporos Fúngicos/citologia
14.
Mycologia ; 112(2): 329-341, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31910130

RESUMO

We studied the South American species of Cortinarius section Thaumasti based on morphological and molecular data. Members of this group can easily be identified in the field because the basidiomata are small and Phlegmacium-like with a bulbous stipe and the universal veil in most species forms a distinct volva at the base of the stipe. The phylogenetic delimitation of the clade was mostly in concordance with the earlier, morphology-based grouping of the South American taxa except that C. chrysophaeus was resolved outside of the clade. Altogether nine species were recognized in the section. Four species, C. chlorophanus, C. coleopus, C. cosmoxanthus, and C. vaginatus, were previously described by other authors, whereas three species, C. chlorosplendidus, C. olivaceovaginatus, and C. subcosmoxanthus, are described here as new. We were able to identify two remaining taxa, but we do not have sufficient morphological data to allow for a formal description. All of the species in C. section Thaumasti form ectomycorrhizal associations with Nothofagaceae. They have been documented from South America and New Zealand. The Patagonian species are considered endemic to the region. A key to the described species is provided.


Assuntos
Agaricales/classificação , Fagales/microbiologia , Micorrizas , Agaricales/citologia , Agaricales/genética , Agaricales/isolamento & purificação , DNA Espaçador Ribossômico , Florestas , Genes Fúngicos , Nova Zelândia , Filogenia , América do Sul
15.
Mycopathologia ; 185(2): 389-394, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31915988

RESUMO

A case of fungal keratitis due to Coprinellus radians is reported. To our knowledge, fungal keratitis caused by this species was rare. Fungal hyphae were detected in corneal scrapings, and isolates were identified by morphology and by sequencing the internal transcribed spacer region of ribosomal DNA. The patient was treated with systemic and local antifungal therapy for 5 days, and lamellar keratoplasty was performed after no obvious improvement in symptoms. The in vitro antifungal susceptibilities of the case strain were tested for six antifungal agents. The results showed that 5-fluorouracil was resistant, fluconazole was moderately sensitive, and the other drugs assayed (amphotericin B, posaconazole, itraconazole and voriconazole) were highly effective against this fungus.


Assuntos
Agaricales , Antifúngicos/uso terapêutico , Ceratite , Agaricales/citologia , Agaricales/genética , Agaricales/isolamento & purificação , Anfotericina B/uso terapêutico , Transplante de Córnea , Úlcera da Córnea/tratamento farmacológico , Úlcera da Córnea/cirurgia , DNA Fúngico , DNA Espaçador Ribossômico , Infecções Oculares Fúngicas/patologia , Feminino , Humanos , Hifas/isolamento & purificação , Ceratite/tratamento farmacológico , Ceratite/microbiologia , Ceratite/patologia , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Triazóis/uso terapêutico
16.
Nat Prod Res ; 34(21): 3130-3133, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31112042

RESUMO

An endophytic fungus that can produce flavonoids was isolated from the seed of Ginkgo biloba cultured in Czapek-Dox medium and chromatographic separation of the ethyl acetate extract of the broth and mycelium led to the isolation of ergosterol (1), 2'-hydroxychalcone (2), myristic acid (3), cis-9-octadecenoamide (4), quercetin (5), carboxybenzene (6), uracil (7) and nicotinamide (8). This study is the first to report of the isolation of the endophytic fungus Psathyrella candolleana from the seed of Ginkgo biloba with complete assignments of 1-8. Compound (5) exhibited strong antioxidant activity of diphenyl picryl hydrazinyl (CL50 14.538 µg/mg) and compounds (5), (6) and (8) have antibacterial activity against Staphylococcus aureus (MIC 0.3906, 0.7812 and 6.25 mg/mL).


Assuntos
Agaricales/metabolismo , Antibacterianos/farmacologia , Flavonoides/farmacologia , Ginkgo biloba/microbiologia , Agaricales/isolamento & purificação , Antibacterianos/química , Antibacterianos/isolamento & purificação , Antioxidantes/química , Antioxidantes/farmacologia , Endófitos/metabolismo , Flavonoides/química , Flavonoides/metabolismo , Testes de Sensibilidade Microbiana , Estrutura Molecular , Micélio/química , Micélio/metabolismo , Metabolismo Secundário , Sementes/microbiologia , Staphylococcus aureus/efeitos dos fármacos
17.
PLoS One ; 14(8): e0220776, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31437163

RESUMO

Cell-to-cell communication is a key element of microvascular blood flow control, including rapidly carrying signals through the vascular endothelium in response to local stimuli. This cell-to-cell communication is negatively impacted during inflammation through the disruption of junctional integrity. Such disruption is associated with promoting the onset of cardiovascular diseases as a result of altered microvascular blood flow regulation. Therefore, understanding the mechanisms how inflammation drives microvascular dysfunction and compounds that mitigate such inflammation and dysfunction are of great interest for development. As such we aimed to investigate extracts of mushrooms as potential novel compounds. Using intravital microscopy, the medicinal mushroom, Inonotus obliquus was observed, to attenuate histamine-induced inflammation conducted vasodilation in second-order arterioles in the gluteus maximus muscle of C57BL/6 mice. Mast cell activation by C48/80 similarly disrupted endothelial junctions and conducted vasodilation but only histamine was blocked by the histamine antagonist, pyrilamine not C48/80 suggesting the importance of mast cell activation. Data presented here supports that histamine induced inflammation is a major disruptor of junctional integrity, and highlights the important anti-inflammatory properties of Inonotus obliquus focusing future assessment of mast cells as putative target for Inonotus obliquus.


Assuntos
Basidiomycota/isolamento & purificação , Microvasos/efeitos dos fármacos , Microvasos/imunologia , Agaricales/isolamento & purificação , Agaricales/metabolismo , Animais , Arteríolas/efeitos dos fármacos , Basidiomycota/metabolismo , Endotélio Vascular/efeitos dos fármacos , Histamina/metabolismo , Inflamação/tratamento farmacológico , Inflamação/metabolismo , Junções Intercelulares/efeitos dos fármacos , Junções Intercelulares/metabolismo , Masculino , Mastócitos/efeitos dos fármacos , Mastócitos/fisiologia , Camundongos , Camundongos Endogâmicos C57BL , Pirilamina/farmacologia , Vasodilatação/efeitos dos fármacos
18.
BMC Microbiol ; 19(1): 158, 2019 07 10.
Artigo em Inglês | MEDLINE | ID: mdl-31291888

RESUMO

BACKGROUND: Gastrodia elata is a widely distributed achlorophyllous orchid and is highly valued as both medicine and food. Gastrodia elata produces dust-like seeds and relies on mycorrhizal fungi for its germination and growth. In its life cycle, G. elata is considered to switch from a specific single-fungus relationship (Mycena) to another single-fungus relationship (Armillaria). However, no studies have investigated the changes in the plant-fungus relationship during the growth of G. elata in the wild. In this study, high-throughput sequencing was used to characterize the fungal community of tubers in different growth phases as well as the soils surrounding G. elata. RESULTS: The predominant fungi were Basidiomycota (60.44%) and Ascomycota (26.40%), which exhibited changes in abundance and diversity with the growth phases of G. elata. Diverse basidiomycetes in protocorms (phase P) were Hyphodontia, Sistotrema, Tricholoma, Mingxiaea, Russula, and Mycena, but the community changed from a large proportion of Resinicium bicolor (40%) in rice-like tubers (phase M) to an unidentified Agaricales operational taxonomic unit 1(OTU1,98.45%) in propagation vegetation tubers (phase B). The soil fungi primarily included Simocybe, Psathyrella, Conocybe, and Subulicystidium. Three Mycena OTUs obtained in this study were differentially distributed among the growth phases of G. elata, accounting for less than 1.0% of the total reads, and were phylogenetically close to Mycena epipterygia and M. alexandri. CONCLUSIONS: Our data indicated that G. elata interacts with a broad range of fungi beyond the Mycena genus. These fungi changed with the growth phases of G. elata. In addition, these data suggested that the development of the fungal community during the growth of G. elata was more complex than previously assumed and that at least two different fungi could be involved in development before the arrival of Armillaria.


Assuntos
Gastrodia , Interações entre Hospedeiro e Microrganismos , Micobioma/genética , Agaricales/genética , Agaricales/isolamento & purificação , Basidiomycota/genética , Basidiomycota/isolamento & purificação , DNA Espaçador Ribossômico/genética , Gastrodia/crescimento & desenvolvimento , Gastrodia/microbiologia , Sequenciamento de Nucleotídeos em Larga Escala , Metagenômica , Filogenia , Microbiologia do Solo , Simbiose
19.
Life Sci ; 230: 208-217, 2019 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-31152815

RESUMO

Mushroom Phellinus linteus ("Sanghuang" in Chinese) is a popular medicinal polypore used to treat several disorders through its various biological functions. Inonotus sanghuang is claimed to produce general immune-potentiating and strengthening, anti-inflammatory, anti-tumor and anti-microbial properties, but its effect on acute lung inflammation and oxidative stress are not clearly understood. To determine the effect and mechanism of the polyphenols-rich ethyl acetate fraction from wild I. sanghuang extract (ISE) on acute lung injury (ALI) induced by bleomycin (BLM), female C57BL/6 mice were fed ISE (0%, 0.15% or 0.6% in diet) for 4 weeks prior to challenge with BLM. Bronchoalveolar lavage fluid (BALF) from lung, spleen and lung tissues were collected on day 3 after BLM challenge for histological, oxidative stress, molecular and biochemical analysis. ISE supplementation improved pathological features in lung injury scores and reduced lung wet-to-dry ratios. Moreover, ISE reduced inflammatory cell infiltration and the pro-inflammatory cytokines including IL-1ß, IL-6 and TNF-α in BALF, decreased the MPO activity and the MDA level and increased the SOD, CAT and GSH-Px activities in lung tissue homogenates. Further mechanism analysis demonstrated that dietary ISE inhibited NF-κB signal. Finally, peripheral immune function analysis showed that ISE had less effect on immune response including splenocyte producing inflammatory cytokines and T cell proliferation except for IL-1ß and IL-2. Our findings indicate the possibility that dietary ISE attenuates ALI induced by BLM through correcting the inflammation and oxidation balance at least in part via inhibiting NF-κB signal in vivo, suggesting that ISE might be a valuable medicinal food effective in improving lung injury.


Assuntos
Lesão Pulmonar Aguda/tratamento farmacológico , Extratos Vegetais/farmacologia , Lesão Pulmonar Aguda/induzido quimicamente , Agaricales/isolamento & purificação , Agaricales/metabolismo , Animais , Antioxidantes/farmacologia , Bleomicina/farmacologia , Líquido da Lavagem Broncoalveolar/citologia , Citocinas/metabolismo , Feminino , Inflamação/patologia , Interleucina-1beta/farmacologia , Pulmão/patologia , Camundongos , Camundongos Endogâmicos C57BL , Fator 2 Relacionado a NF-E2/metabolismo , NF-kappa B/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Phellinus , Polifenóis/isolamento & purificação , Polifenóis/farmacologia , Transdução de Sinais/efeitos dos fármacos , Fator de Necrose Tumoral alfa/farmacologia
20.
Lab Med ; 50(4): 426-431, 2019 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-31065690

RESUMO

Hormographiella is a rare fungal pathogen in humans; however, case reports have described disseminated infection in immunocompromised hosts. This pathogen has been described to yield poor prognosis in patients who harbor it. Herein, we present a case report of autopsy-proven disseminated Hormographiella aspergillata infection, confirmed by DNA sequencing, in a patient experiencing a relapse of leukemia. This 54-year-old Caucasian man with chronic myelogenous leukemia (CML) that had been diagnosed in 1989, after having received a hematopoietic cell allotransplant from a compatible sibling donor, had B-cell lymphoid-blast phase of CML in April of 2013, with multiple relapses. His most recent relapse was in September of 2016, when bone marrow biopsy showed 90% blasts. The results of bronchoalveolar lavage (BAL) cultures were positive for filamentous fungus infection. The patient developed encephalopathy and worsening respiratory statusand tachycardia with flutter and hypotension, which resulted in his death. At autopsy, bilateral pleural effusions, multiple right pleural nodules, and subarachnoid hemorrhage were noted. Angioinvasive hyphal fungi were found in the right frontal lobe of the brain and the right upper lobe of the lung. Morphologically, the fungi had multiseptate, branching hyphae. The bronchoalveolar lavage specimen grew a fungus for which the colony morphologic characteristics and microscopic features were compatible with a Hormographiella species. H. aspergillata from the bronchoalveolar lavage was further identified by sequencing the D2 hypervariable region of the large-subunit (LSU) ribosomal DNA gene and the full internal transcribed spacer (ITS) regions.


Assuntos
Agaricales/isolamento & purificação , Infecções Fúngicas do Sistema Nervoso Central/diagnóstico , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Infecções Fúngicas Invasivas/diagnóstico , Pneumopatias Fúngicas/diagnóstico , Transplante Homólogo/efeitos adversos , Agaricales/classificação , Agaricales/genética , Autopsia , Encéfalo/microbiologia , Encéfalo/patologia , Líquido da Lavagem Broncoalveolar/microbiologia , Infecções Fúngicas do Sistema Nervoso Central/microbiologia , Infecções Fúngicas do Sistema Nervoso Central/patologia , Evolução Fatal , Histocitoquímica , Humanos , Infecções Fúngicas Invasivas/microbiologia , Infecções Fúngicas Invasivas/patologia , Leucemia Mielogênica Crônica BCR-ABL Positiva/complicações , Leucemia Mielogênica Crônica BCR-ABL Positiva/terapia , Pulmão/microbiologia , Pulmão/patologia , Pneumopatias Fúngicas/microbiologia , Pneumopatias Fúngicas/patologia , Masculino , Pessoa de Meia-Idade
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