RESUMEN
Copper (Cu) tolerance was well understood in fungi yeasts but not in filamentous fungi. Filamentous fungi are eukaryotes but unlike eukaryotic fungi yeasts, which are a collection of various fungi that are maybe classified into different taxa but all characterized by growth as filamentous hyphae cells and with a complex morphology. The current knowledge of Cu resistance of filamentous fungi is still fragmental and therefore needs to be bridged. In this study, we characterized Cu resistance of Penicillium janthinellum strain GXCR and its Cu-resistance-decreasing mutants (EC-6 and UC-8), and conducted sequencing of a total of 6 transcriptomes from wild-type GXCR and mutant EC-6 grown under control and external Cu. Taken all the results together, Cu effects on the basal metabolism were directed to solute transport by two superfamilies of solute carrier and major facilitator, the buffering free CoA and Acyl-CoA pool in the peroxisome, F-type H(+)-transporting ATPases-based ATP production, V-type H(+)-transporting ATPases-based transmembrane transport, protein degradation, and alternative splicing of pre-mRNAs. Roles of enzymatic and non-enzymatic antioxidants in resistance to low and high Cu were defined. The backbone paths, signaling systems, and determinants that involve resistance of filamentous fungi to high Cu were determined, discussed and outlined in a model.
Asunto(s)
Cobre/farmacología , Penicillium/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Penicillium/genética , Penicillium/crecimiento & desarrollo , Penicillium/metabolismo , Prolina/metabolismo , Especies Reactivas de Oxígeno/metabolismo , TranscriptomaRESUMEN
Sixty-one endophytic fungus strains with different colony morphologies were isolated from the leaves, stems and roots of Tephrosia purpurea with colonization rates of 66.95%, 37.50%, and 26.92%, respectively. Based on internal transcribed spacer sequence analysis, 61 isolates were classified into 16 genera belonging to 3 classes under the phylum Ascomycota. Of the 61 isolates, 6 (9.84%) exhibited antifungal activity against one or more indicator plant pathogenic fungi according to the dual culture test. Isolate TPL25 had the broadest antifungal spectrum of activity, and isolate TPL35 was active against 5 plant pathogenic fungi. Furthermore, culture filtrates of TPL25 and TPL35 exhibited greater than 80% growth inhibition against Sclerotinia sclerotiorum. We conclude that the endophytic fungal strains TPL25 and TPL35 are promising sources of bioactive compounds.
Asunto(s)
Ascomicetos , Colon , Hongos , Plantas , Análisis de Secuencia , TephrosiaRESUMEN
<p><b>OBJECTIVE</b>To establish a high-sensitivity, high-specificity and low-cost hydrogel chip platform for the clinical screening of Y chromosome microdeletions.</p><p><b>METHODS</b>Site-specific extended primers with a common sequence at the 5' end were used for hybridizing with the target. The Cy5-dUTP was incorporated into the products by primer extension, and the products were labeled with fluorescence. Then the extended products were added to the chip for hybridizing with acrylamide-modified common probes immobilized on the chip. After removal of the free Cy5-dUTP by electrophoresis, the signals were obtained by fluorescence scanning. And the detecting conditions of this method were optimized.</p><p><b>RESULTS</b>SY254 of 9 samples was successfully detected with the hydrogel chip. The results showed that 3 were normal and the other 6 with microdeletions (1 female sample as a negative control), which coincided with the results of conventional multiplex PCR-electrophoresis.</p><p><b>CONCLUSION</b>The hydrogel chip platform we established has provided a new technique for the detection of Y chromosome microdeletions, and is beneficial to the diagnosis and treatment of male infertility.</p>
Asunto(s)
Humanos , Masculino , Carbocianinas , Deleción Cromosómica , Cromosomas Humanos Y , Genética , Nucleótidos de Desoxiuracil , Hidrogeles , Infertilidad Masculina , Análisis de Secuencia por Matrices de Oligonucleótidos , Métodos , Aberraciones Cromosómicas Sexuales , Trastornos de los Cromosomas Sexuales del Desarrollo Sexual , Diagnóstico , GenéticaRESUMEN
Appressorium is an infection structure of the phytopathogenic fungus Magnaporthe grisea. Analysis of gene expression profiles of appressorium development provides insight into the molecular basis of pathogenicity and control of this fungal plant disease. A cDNA array representing 2927 unique genes based on a large EST (expressed sequence tag) database of M. grisea strain Y34 was constructed and used to profile the gene expression patterns at mycelium and appressorium maturation stages. Compared with mycelia, 55 up-regulated and 22 down-regulated genes were identified in mature appressoria. Among 77 genes, 16 genes showed no similarity to the genome sequences of M. grisea. A novel homologue of peptidyl-prolyl cis-trans isomerase was found to be expressed at low-level in mature appressoria of M. grisea. The results indicated that the genes such as pyruvate carboxylase, phospholipid metabolism-related protein and glyceraldehyde 3-phosphate dehydrogenase involved in gluconeogenesis, lipid metabolism and glycolysis, showed differential expression in mature appressoria. Furthermore, genes such as PTH11, beta subunit of G protein and SGT1 involved in cell signalling, were expressed differentially in mature appressoria. Northern blot analysis was used to confirm the cDNA array results.
Asunto(s)
Proliferación Celular , Proteínas Fúngicas , Metabolismo , Estructuras Fúngicas , Metabolismo , Perfilación de la Expresión Génica , Métodos , Magnaporthe , Metabolismo , Análisis de Secuencia por Matrices de Oligonucleótidos , Métodos , Proteoma , MetabolismoRESUMEN
<p><b>BACKGROUND</b>To explore the effect of treating hepatitis hyperbilirubinemia with Chinese traditional "cooling the blood and invigorating blood circulation" method.</p><p><b>METHODS</b>Seventy-two patients were randomly divided into two groups. The control group (n=36) was treated with hepatocyte growth factor (HGF) 80-120 mg daily on the basis of routine western medicine treatment. The therapy group (n=36) was treated with "cooling the blood and invigorating blood circulation" decoction on the basis of routine western medicine treatment. After using the medicine for 28 days, alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL), albumin (ALB) in plasma were measured to compare the effects of the two methods.</p><p><b>RESULTS</b>The effective rate of the therapy group was 80.55%, that of the control group was 50%. There was significant difference in efficacy between the two groups (P<0.05).</p><p><b>CONCLUSION</b>"Cooling the blood and invigorating blood circulation" method may be effective and safe in the treatment of hepatitis hyperbilirubinemia.</p>