(±)-Talapyrones A-F (1-6), six pairs of dimeric polyketide enantiomers featuring unusual 6/6/6 and 6/6/6/5 ring systems, were isolated from the fungus Talaromyces adpressus. Their structures were determined by spectroscopic analysis and HR-ESI-MS data, and their absolute configurations were elucidated using a modified Mosher's method and electronic circular dichroism (ECD) calculations. (±)-Talapyrones A-F (1-6) possess a 6/6/6 tricyclic skeleton, presumably formed through a Michael addition reaction between one molecule of α-pyrone derivative and one molecule of C₈ poly-β-keto chain. In addition, compounds 2/3 and 4/5 are two pairs of C-18 epimers, respectively. Putative biosynthetic pathways of 1-6 were discussed.
Polyketides/isolation & purification* ; Talaromyces/chemistry* ; Stereoisomerism ; Molecular Structure ; Circular Dichroism ; Pyrones/chemistry*

Objective: To investigate the clinical manifestations, treatments, and prognosis of pediatric patients with Talaromyces marneffei infection. Methods: In this retrospective study, 7 children diagnosed with Talaromyces marneffei infection in Shenzhen Children's Hospital from July 2017 to October 2021 were recruited. The clinical features, radiology, pathogen detection, immunological evaluation, treatments, and prognosis were analyzed. Results: In 7 cases, 5 were male, 2 were females. The age was from 0.75 to 8.75 years. The main clinical manifestations were fever in 7 cases, cough in 6 cases, malnutrition in 4 cases, papules in 2 cases and medical history of recurrent infection in 3 cases. Physical examination showed that all 7 patients had hepatosplenomegaly, 4 had superficial lymphadenopathy. Laboratory examination showed that 6 cases had decreased hemoglobin and 3 cases had decreased platelet. Chest CT showed that 4 cases had patchy shadows, pleural effusion, mediastinal or axillary lymph node enlargement, 3 had nodular shadows and 2 had cavities. The positive ratio of Talaromyces marneffei culture was 2/2 with tissue samples, 4/5 with bone marrow. The positive ratio was 3/4 by metagenomic next generation sequencing. The fungus was detected in 3 cases by smear microscopy of bone marrow and (or) peripheral blood. All patients were negative for human immunodeficiency virus by the immune function assay. However, 5 cases were confirmed as primary immunodeficiency disease, including 2 cases with high IgM syndrome, 2 with STAT1 gene variation, and the last with severe combined immunodeficiency (IL2RG gene variation). Exclude 1 case which gave up treatment due to acute intracranial infection, and the other patients received effective treatments along with amphotericin B, voriconazole, and itraconazole alone or in combination. Two cases relapsed after medication withdrawal, but 1 case got complete rehabilitation after hematopoietic stem cell transplantation. Conclusions: The clinical manifestations involve multisystem, the common charateristics are fever and cough. The chest CT imaging manifestations are diverse, it should be considered in differentiating tuberculosis. The amphotericin B, voriconazole and itraconazole are effective, but it will easily relapse when withdrawing those antifungal agents.
Amphotericin B/therapeutic use* ; Antifungal Agents/therapeutic use* ; Child ; Child, Preschool ; Cough ; Female ; Fever ; Humans ; Infant ; Itraconazole/therapeutic use* ; Male ; Mycoses ; Retrospective Studies ; Talaromyces ; Voriconazole

Aims: Penicillium and Talaromyces were among the species of microfungi that inhabit beach sand in Batu Ferringhi Beach, Penang Island, Malaysia. Previously, Talaromyces was described as the sexual stage of Penicillium, but both are now accepted as separate genera based on molecular phylogeny. The aim of the present study was to identify species of Penicillium and Talaromyces that are present in beach sand in Malaysia. Methodology and results: Species identities were confirmed according to similarities of the internal transcribed spacer regions and β-tubulin gene sequences and a phylogenetic analysis based on both regions/gene. Nine Penicillium spp. were identified as P. georgiense, P. chermesinum, P. pimiteouiense, P. citrinum, P. oxalicum, P. daleae, P. rolfsii and Penicillium sp. and the four Talaromyces spp. were T. siamense, T. atroroseus, T. minioluteus and T. fusiformis. Conclusion, significance and impact of study These findings showed that beach sand harboured a variety of Penicillium and Talaromyces species. The occurrence of Penicillium and Talaromyces in beach sands is associated with the organic matter in the sand, which provides suitable substrates and nutrient sources. Due to this, beach sand might harbour many potentially pathogenic or opportunistic species that may pose a health concern to immunocompromised individuals.
Penicillium ; Talaromyces ; Sand

Abscess/diagnosis* ; Diagnostic Errors ; Humans ; Mycoses ; Penicillium ; Talaromyces

Eight compounds,(R)-2-[5-(methoxycarbonyl)-4-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]acetic acid(1),(3S,4R)-3,4-dihydro-3,4-epoxy-5-hydroxynaphthalen-1(2H)-one(2),(-)-mitorubrinol(3),(-)-mitorubrin(4),(±)-asperlone A(5), terreusinone(6), verrucisidinol(7) and cerebroside C(8) were isolated from the endophytic fungus Talaromyces purpurogenus by using various column chromatographic techniques. Their structures were identified by NMR, MS, CD and optical rotation. Compounds 1 and 2 were new compounds. Their anti-diabetic activities in vitro were evaluated, and compound 1 showed moderate inhibitory activity toward XOD at 10 μmol·L~(-1) with the inhibition rate of 69.9%.
Endophytes/chemistry* ; Hypoglycemic Agents/chemistry* ; Magnetic Resonance Spectroscopy ; Molecular Structure ; Secondary Metabolism ; Talaromyces/chemistry* ; Tylophora/microbiology* ; Xanthine Oxidase/antagonists & inhibitors*

Glucoamylase is a critical ingredient for saccharification in the starch decomposition, and widely used in food, pharmaceutical and fermentation industries. Glucoamylases are usually thermostable and have peak activities at high temperature, as required for the industrial process of glucose production. In this study, a glucoamylase gene belonging to the glycoside hydrolase (GH) family 15, Tlga15A, was cloned from Talaromyces leycettanus JCM12802, and successfully expressed in Pichia pastoris GS115. Recombinant glucoamylase TlGA showed optimal activities at pH 4.5 and 75 °C. The result of thermostability analysis showed that TlGA retained above 70% activity after incubating for 1 h at 65 °C, and 43% residual activity after 30 min at 70 °C. Moreover, TlGA had high resistance to most metal ions and chemical reagents tested. Various starch substrates could be hydrolyzed by TlGA, including soluble starch (255.6±15.3) U/mg, amylopectin (342.3±24.7) U/mg, glycogen (185.4±12.5) U/mg, dextrin (423.3±29.3) U/mg and pullulan (65.7±8.1) U/mg. The primary, secondary and tertiary structures of glucoamylase were further analyzed. The low ratio of Gly in the primary structure and low exposed nonpolarity solvent accessible surface in the tertiary structure may be the main reasons for TlGA's thermostability. These results show that TlGA is great promising for potential use in the commercial production of glucose syrups. Moreover, this research will provide knowledge and innovating ideas for the improvement of glucoamylase thermostability.
Cloning, Molecular ; Enzyme Stability ; Glucan 1,4-alpha-Glucosidase ; Hydrogen-Ion Concentration ; Pichia ; Talaromyces ; Temperature

In order to elucidate the fungal diversity and community structure in freshwater environments, numerous fungal strains were isolated from freshwater, submerged soils, twigs, dead insects, etc. Among them, the present study has focused specifically on Aspergillus, Penicillium, and Talaromyces species, which produce diverse useful metabolites in general. Twelve strains of Aspergillus isolated were identified as A. japonicus (n = 5), A. tubingensis (3), A. niger (2), and A. flavus (2), 10 strains of which belong to Aspergillus section Nigri, named black Aspergillus. Eight strains of Penicillium were identified as P. brasilianim (n = 3), P. oxalicum (2), P. crustosum (1), P. expansum (1), and P. piscarium (1). Two different strains of Talaromyces were identified as T. pinophilus and T. versatilis. Thus far, Penicillium piscarium and Talaromyces versatilis have been unrecorded in Korea, for which we provide detailed morphological and molecular characteristics.
Aspergillus ; Fresh Water ; Insects ; Korea ; Niger ; Penicillium ; Soil ; Talaromyces

Talaromyces marneffei is the only dimorphic species in its genus and causes a fatal systemic mycosis named talaromycosis. Our previous study indicated that knockdown of AcuD gene (encodes isocitrate lyase of glyoxylate bypass) of T. marneffei by RNA interference approach attenuated the virulence of T. marneffei, while the virulence of the AcuD knockout strains was not studied. In this study, T. marneffei-zebrafish infection model was successfully established through hindbrain microinjection with different amounts of T. marneffei yeast cells. After co-incubated at 28°C, the increasing T. marneffei inoculum doses result in greater larval mortality; and hyphae generation might be one virulence factor involved in T. marneffei-zebrafish infection. Moreover, the results demonstrated that the virulence of the ΔAcuD was significantly attenuated in this Zebrafish infection model.
Gene Knockout Techniques ; Hyphae ; Isocitrate Lyase ; Microinjections ; Mortality ; Rhombencephalon ; RNA Interference ; Talaromyces ; Virulence ; Yeasts ; Zebrafish

Four strains of Penicillium and Talaromyces species are described and illustrated in an inventory of fungal species belonging to Eurotiales. The strains, CNUFC-DDS17-1, CNUFC-DDS27-1, CNUFC-PTM72-1, and CNUFC-YJW3-31, were isolated from soil and freshwater samples from South Korea. Based on their morphological characteristics and sequence analyses by the combined β-tubulin and calmodulin gene, the CNUFC-DDS17-1, CNUFC-DDS27-1, CNUFC-PTM72-1, and CNUFC-YJW3-31 isolates were identified as Penicillium pasqualense, Penicillium sanguifluum, Talaromyces apiculatus, and Talaromyces liani, respectively. The designated strains were found to represent a previously undescribed species of Korean fungal biota. In this study, detailed morphological descriptions and phylogenetic relationships of these species are provided.
Biota ; Calmodulin ; Eurotiales ; Fresh Water ; Korea ; Penicillium ; Sequence Analysis ; Soil ; Talaromyces

No abstract available.
Penicillium* ; Talaromyces*