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https://www.readbyqxmd.com/read/27917280/antifungal-activity-of-zataria-multiflora-essential-oil-loaded-solid-lipid-nanoparticles-in-vitro-condition
#1
Mahboobeh Nasseri, Shiva Golmohammadzadeh, Hossein Arouiee, Mahmoud Reza Jaafari, Hossein Neamati
OBJECTIVES: The aim of the present study was to prepare, characterize, and evaluate solid lipid nanoparticles (SLNs) containing Zataria multiflora essential oil (ZEO). MATERIALS AND METHODS: In this study, Z. multiflora essential oil-loaded solid lipid nanoparticles (ZE-SLNs) were prepared to improve its efficiency in controlling some fungal pathogens. SLNs containing Z. multiflora essential oil were prepared by high shear homogenization and ultra sound technique...
November 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/27888464/mycobiota-of-ground-red-pepper-and-their-aflatoxigenic-potential
#2
Hyeonheui Ham, Sosoo Kim, Min-Hee Kim, Soohyung Lee, Sung Kee Hong, Jae-Gee Ryu, Theresa Lee
To investigate contamination of ground red pepper with fungi and mycotoxin, we obtained 30 ground red pepper samples from 15 manufacturers in the main chili-pepper-producing areas in Korea. Fungal contamination was evaluated by spreading diluted samples on potato dextrose agar plates. The total fungi counts ranged from 0 to 7.3 × 10(3) CFU/g. In the samples, the genus Aspergillus had the highest incidence, while Paecilomyces was isolated most frequently. The next most frequent genera were Rhizopus, Penicillium, Cladosporium, and Alternaria...
December 2016: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/27880962/production-of-cellulases-by-rhizopus-stolonifer-from-glucose-containing-media-based-on-the-regulation-of-transcriptional-regulator-cre
#3
Yingyiing Zhang, Bin Tang, Guocheng Du
Carbon catabolite repression is a crucial regulation in microorganism, while its characteristic in Rhizopus is unclear now. We extracted a carbon regulation gene cre that encoded a carbon catabolite repressor protein (CRE) from Rhizopus stolonifer TP-02, and studied the regulation of CRE by real-time qPCR. CRE responded to the glucose in a certain range, wherein it could significantly regulate part of cellulases genes (eg, bg and cbh2) without cbh1. Compared with the responding of cre and four cellulases genes to the carboxymethylcellulose sodium (CMC) and the simple carbon source (lactose), the effect of CRE was only related to the concentration of reducing sugars...
November 23, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27866629/fungal-surface-protein-mediated-one-pot-synthesis-of-stable-and-hemocompatible-gold-nanoparticles
#4
Michael Kitching, Priyadarshani Choudhary, Saikumar Inguva, Yina Guo, Meghana Ramani, Sujoy K Das, Enrico Marsili
Despite their large secretome and wide applications in bioprocesses, fungi remain underexplored in metal nanoparticles (MNP) biosynthesis. Previous studies have shown that cell surface proteins of Rhizopus oryzae play a crucial role in biomineralization of Au(III) to produce gold nanoparticles (AuNPs). Therefore, it is hypothesized that purified cell surface protein may produce in vitro AuNPs with narrow size distribution for biomedical and biocatalytic applications. However, different protein extraction methods might affect protein stability and the AuNP biosynthesis process...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27866619/rhizopus-stolonifer-mediated-biosynthesis-of-biocompatible-cadmium-chalcogenide-quantum-dots
#5
P Mareeswari, J Brijitta, S Harikrishna Etti, C Meganathan, Gobi Saravanan Kaliaraj
We report an efficient method to biosynthesize biocompatible cadmium telluride and cadmium sulphide quantum dots from the fungus Rhizopus stolonifer. The suspension of the quantum dots exhibited purple and greenish-blue luminescence respectively upon UV light illumination. Photoluminescence spectroscopy, X-ray diffraction, and transmission electron microscopy confirms the formation of the quantum dots. From the photoluminescence spectrum the emission maxima is found to be 424 and 476nm respectively. The X-ray diffraction of the quantum dots matches with results reported in literature...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27862750/skin-lesion-in-a-patient-with-acute-myeloid-leukemia
#6
Atul Kothari, Sara C Shalin, Juan Carlos Crescencio, Mary J Burgess
We present the case of a 51-year-old man with acute myeloid leukemia who developed fevers with a skin lesion following the first cycle of induction chemotherapy. Skin biopsy showed evidence of invasive fungal infection. Cultures remained negative, but polymerase chain reaction on tissue detected Rhizopus oryzae complex. Patient was started on liposomal amphotericin B and underwent surgical debridement. He was switched to posaconazole, with plans for allogeneic hematopoetic stem cell transplant in the future...
November 16, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/27848109/monitoring-of-aflatoxin-g1-b1-g2-and-b2-occurrence-in-some-samples-of-walnut
#7
Reza Habibipour, Parisa Rahimi Tamandegani, Abbas Farmany
This research was conducted to monitor the aflatoxigenic fungi and aflatoxin contamination of walnut in the Hamedan province. For this purpose, 40 samples were analyzed. Aspergillus, Alternaria, Rhizopus, Cladosporium, Fusarium, yeast, and some different bacteria were isolated from walnuts. Aspergillus is the most frequent genus. Aspergillus flavus was predominantly isolated. HPLC was used for evaluation of aflatoxin contamination of walnut samples. Aflatoxins G1 (AFG1), B1 (AFB1), G2 (AFG2), and B2 (AFB2) were produced by 20 isolates...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27844458/intergeneric-fusant-development-using-chitinase-preparation-of-rhizopus-stolonifer-ncim-880
#8
Kailas D Sonawane, Narayan R Dandagal, Akibjaved G Naikwadi, Piyush T Gurav, Samar V Anapat, Naiem H Nadaf, Deepak B Jadhav, Shailesh R Waghmare
Fungal chitinase have tremendous applications in biotech industries, with this approach we focused on extracellular chitinase from Rhizopus stolonifer NCIM 880 for the formation of fungal protoplasts. The maximum chitinase production reached after 24 h at 2.5% colloidal chitin concentration in presence of starch as an inducer. Chitinase was extracted efficiently at 65% cold acetone concentration and then purified by using DEAE-Cellulose column chromatography. Purified chitinase having molecular weight 22 kDa with single polypeptide chain was optimally active at pH 5...
December 2016: AMB Express
https://www.readbyqxmd.com/read/27834873/biocatalytic-synthesis-of-novel-partial-esters-of-a-bioactive-dihydroxy-4-methylcoumarin-by-rhizopus-oryzae-lipase-rol
#9
Vinod Kumar, Divya Mathur, Smriti Srivastava, Shashwat Malhotra, Neha Rana, Suraj K Singh, Brajendra K Singh, Ashok K Prasad, Anjani J Varma, Christophe Len, Ramesh C Kuhad, Rajendra K Saxena, Virinder S Parmar
Highly regioselective acylation has been observed in 7,8-dihydroxy-4-methylcoumarin (DHMC) by the lipase from Rhizopus oryzae suspended in tetrahydrofuran (THF) at 45 °C using six different acid anhydrides as acylating agents. The acylation occurred regioselectively at one of the two hydroxy groups of the coumarin moiety resulting in the formation of 8-acyloxy-7-hydroxy-4-methylcoumarins, which are important bioactive molecules for studying biotansformations in animals, and are otherwise very difficult to obtain by only chemical steps...
November 9, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27832748/invasive-mucormycosis-in-children-an-epidemiologic-study-in-european-and-non-european-countries-based-on-two-registries
#10
Zoi Dorothea Pana, Danila Seidel, Anna Skiada, Andreas H Groll, Georgios Petrikkos, Oliver A Cornely, Emmanuel Roilides
BACKGROUND: Mucormycosis has emerged as a rare but frequently fatal invasive fungal disease. Current knowledge on paediatric mucormycosis is based on case reports and small series reported over several decades. Contemporary data on a large cohort of patients is lacking. METHODS: Two large international registries (Zygomyco.net and FungiScope™) were searched for mucormycosis cases in ≤19 year-old patients. Cases enrolled between 2005 and 2014 were extracted, and dual entries in the two databases merged...
November 10, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27827543/cuspidate-a-new-anti-fungal-triterpenoid-saponin-from-lepidagathis-cuspidata
#11
Rajeev Rattan, Bharat Inder Fozdar, Veena Gautam, Ritika Sharma, Dinesh Kumar, Upendra Sharma
One new triterpenoid saponin named cuspidate A (1) along with a known oleanane-based triterpenoid saponin clemontanoside-C were isolated from the roots of Lepidagathis cuspidata. The structure of new compound (1) was established after detailed analysis of spectroscopic data including 1D and 2D NMR spectra. This is the first report on clemontanoside-C from this genus. These saponins were found to be effective against the selected fungal strains Aspergillus flavus, Rhizopus stolinifer, Penicillum nodatum, Aspergillus fumigates...
November 9, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27823840/identification-of-the-potent-toxin-bongkrekic-acid-in-a-traditional-african-beverage-linked-to-a-fatal-outbreak
#12
Travis M Falconer, Sara E Kern, Jennifer L Brzezinski, James A Turner, Brian L Boyd, Jonathan J Litzau
In January 2015, 75 people died and 177 were hospitalized in the Mozambique village of Chitima after attending a funeral. The deaths were linked to the consumption of a traditional African beverage called pombe. Samples of the suspect pombe were subjected to myriad analyses and compared to a control sample. Ultimately, non-targeted liquid chromatography-mass spectrometry screening revealed the presence of the potent toxin bongkrekic acid, and its structural isomer, isobongkrekic acid. Quantitative analysis found potentially fatal levels of these toxins in the suspect pombe samples...
October 23, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27807669/primary-cutaneous-mucormycosis-caused-by-rhizopus-oryzae-a-case-report-and-review-of-literature
#13
Erika Rodríguez-Lobato, Lourdes Ramírez-Hobak, Jorge E Aquino-Matus, Juan P Ramírez-Hinojosa, Víctor H Lozano-Fernández, Juan Xicohtencatl-Cortes, Rigoberto Hernández-Castro, Roberto Arenas
Mucormycosis is an invasive infection caused by opportunistic fungi. Rhizopus, Lichtheimia, Mucor and Rhizomucor are the most common isolated genera. Primary cutaneous mucormycosis is usually related to traumatic injuries, but immunocompromised cases are associated with underlying conditions such as diabetes mellitus and malignancies. The treatment of choice is surgical debridement and liposomal amphotericin B. We present a 40-year-old male with fever and a painful necrotic lesion on the middle back and history of poorly controlled diabetes mellitus...
November 3, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27798213/monotherapy-or-combination-therapy-of-isavuconazole-and-micafungin-for-treating-murine-mucormycosis
#14
Teclegiorgis Gebremariam, Nathan P Wiederhold, Abdullah Alqarihi, Priya Uppuluri, Nkechi Azie, John E Edwards, Ashraf S Ibrahim
OBJECTIVES: Previously we demonstrated the benefit of isavuconazole in treating murine mucormycosis due to Rhizopus. We wanted to determine the efficacy of isavuconazole in treating murine mucormycosis caused by Mucor, the second most common cause of the disease. Furthermore, because we previously determined that Rhizopus possesses the target enzyme for echinocandins and micafungin has activity against murine mucormycosis, we compared the activity of combination therapy (isavuconazole + micafungin) with placebo, either drug alone or standard therapy of liposomal amphotericin B (LAmB) in treating pulmonary murine mucormycosis caused by Rhizopus delemar...
October 24, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27796829/evaluation-of-disinfectants-for-elimination-of-fungal-contamination-of-patient-beds-in-a-reference-hospital-in-piau%C3%A3-brazil
#15
Ismael da Silva Aquino, Jhonatas Cley Santos Porto, Jacksony Lima da Silva, Khaiohana Fontinele Costa Morais, Frâncio Alencar Coelho, Thiago de Sousa Lopes, Ivonizete Pires Ribeiro, Iraci Salmito Noleto, Maria do Amparo Salmito, Mitra Mobin
This quantitative and qualitative study aimed to identify fungi isolated from patient beds at a reference hospital in Teresina, Piauí, Brazil, and evaluate the efficacy of 70 % ethanol and 1 % hypochlorite for removing the contamination. Thirty-eight beds were chosen at random and the collection was carried out in three situations: before and after disinfection with 70 % alcohol or hypochlorite 1 %. Each sample was inoculated onto Sabouraud dextrose agar containing chloramphenicol and incubated at room temperature to allow fungal growth...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27790703/the-effect-of-fermented-buckwheat-on-producing-l-carnitine-and-gamma-aminobutyric-acid-gaba-enriched-designer-eggs
#16
Namhyeon Park, Tae-Kyung Lee, Thi Thanh Hanh Nguyen, Eun-Bae An, Nahyun M Kim, Young-Hyun You, Tae-Sub Park, Doman Kim
BACKGROUND: The potential of fermented buckwheat as feed additives was studied to increase L-carnitine and gamma-aminobutyric acid (GABA) in designer eggs. Buckwheat contains high levels of lysine, methionine, and glutamate, which are precursors for the synthesis of L-carnitine and GABA. Rhizopus oligosporus was used for the fermentation of buckwheat to produce L-carnitine and GABA that exert positive effects like enhanced metabolism, antioxidant activities, immunity, and blood pressure control...
October 28, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27780957/purification-and-properties-of-extracellular-lipases-with-transesterification-activity-and-1-3-regioselectivity-from-rhizomucor-miehei-and-rhizopus-oryzae
#17
Miklós Takó, Alexandra KotogÁn, TamÁs Papp, Shine Kadaikunnan, Naiyf S Alharbi, Csaba VÁgvölgyi
Rhizomucor miehei NRRL 5282 and Rhizopus oryzae NRRL 1526 can produce lipases with high synthetic activities in wheat bran-based solid state culture. In this study, purification and biochemical characterization of the lipolytic activities of these lipases are presented. SDS-PAGE indicated a molecular mass of about 55 and 35 kDa for the purified R. miehei and Rh. oryzae enzymes, respectively. p-Nitrophenyl palmitate (pNPP) hydrolysis was maximal at 40°C and pH 7.0 for the R. miehei lipase, and at 30°C and pH 5...
October 25, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27777036/heterologous-expression-of-an-active-chitin-synthase-from-rhizopus-oryzae
#18
Holjes Salgado-Lugo, Alejandro Sánchez-Arreguín, José Ruiz-Herrera
Chitin synthases are highly important enzymes in nature, where they synthesize structural components in species belonging to different eukaryotic kingdoms, including kingdom Fungi. Unfortunately, their structure and the molecular mechanism of synthesis of their microfibrilar product remain largely unknown, probably because no fungal active chitin synthases have been isolated, possibly due to their extreme hydrophobicity. In this study we have turned to the heterologous expression of the transcript from a small chitin synthase of Rhizopus oryzae (RO3G_00942, Chs1) in Escherichia coli...
December 2016: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/27769884/coprophilous-mucorales-ex-zygomycota-from-three-areas-in-the-semi-arid-of-pernambuco-brazil
#19
Carlos Alberto Fragoso de Souza, Diogo Xavier Lima, Luciana M S Gurgel, André Luiz Cabral Monteiro de Azevedo Santiago
Mucorales comprises fungi commonly isolated as saprobes from soil, dung, stored grains and plants. Although these fungi have been studied in several countries, there are relatively a few reports of them in semi-arid areas. Therefore, the aims of the present study were to assess and compare the Mucorales communities in dung from different species and breeds of herbivores in the semi-arid of Pernambuco, based on the frequency of occurrence and species richness of these fungi. Samples of dung collected in the cities of Arcoverde, Serra Talhada and Sertânia were incubated in moist chambers in triplicate...
October 4, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27766196/a-case-of-rhino-orbital-mucormycosis-in-diabetes-with-haematogenous-cerebral-spread
#20
Jennifer Snaith, Kharis Burns, Jen Kok, Sharon Chen, N Wah Cheung
We document the first case of haematogenous cerebral spread in Rhizopus arrhizus rhino-orbital mucormycosis, and of posaconazole related adrenal insufficiency. A patient presenting with diabetic ketoacidosis and sinusitis was treated with right medial maxillectomy, ethmoidectomy and IV liposomal amphotericin. Orbital exenteration was performed after intraorbital spread of infection. IV caspofungin and posaconazole was added but complicated by adrenal insufficiency. MRI revealed a new left lentiform nucleus and thalamus rim-enhancing lesion indicating haematogenous cerebral spread...
September 2016: Medical Mycology Case Reports
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