Accumulation of PbMLS was also higher in P brasiliensis yeast ce

Accumulation of PbMLS was also higher in P. brasiliensis yeast cells than in the mycelial phase (data not shown). These findings were reinforced by the results of Felipe et al. [44], which suggested that the glyoxylate cycle is up-regulated in yeast cells [46]. Yeast cells grown on potassium acetate accumulated more PbMLS on the cell membrane than yeast cells grown on glucose. These results are in agreement with those obtained

by Zambuzzi-Carvalho et al. [30] where the Pbmls transcript level was higher in yeasts cells grown in a two-carbon source than in cells grown on glucose only. The high intensity of ROI found in budding cells, mainly in the cellular membrane, suggests that the PbMLS is metabolically relevant and mainly synthesized CP-673451 clinical trial by young cells (budding cells). It is unknown whether PbMLS plays any part in the differentiation and/or maturity processes of P. brasiliensis budding cells [45, 47]. JQ1 order In fact, the glyoxylate pathway provides metabolic versatility for Candida albicans to utilize alternate substrata for development and differentiation and is involved in the formation of the filamentous State from the single cell State [23]. This process may help Laccaria bicolor

grow toward the host with the aggressiveness required for mycorrhiza formation [48]. Conclusion The results showed the presence of PbMLS in the culture filtrate of yeast cells (parasitic phase), its surface location in P. brasiliensis and its binding to ECM in Far-Western blot and ELISA assays and to A549 cells membranes. The reduction in the adherence of P. brasiliensis to A549 cells by anti-PbMLSr suggests that PbMLS

could contribute to active fungal interaction and disease progression in humans through its ability HSP90 to act as a probable adhesin. In addition, the absence of conventional secretion or cell wall anchoring motifs defines PbMLS as a probable anchorless adhesin that could contribute to virulence by promoting P. brasiliensis infection and dissemination. Methods P. brasiliensis isolate and growth conditions The P. brasiliensis Pb01 isolate (ATCC-MYA-826) was previously investigated in our laboratory and was cultivated in semisolid Fava Netto’s medium (1.0% w/v peptone, 0.5% w/v yeast extract, 0.3% w/v proteose peptone, 0.5% w/v beef extract, 0.5% w/v NaCl, 4% w/v glucose and 1.4% w/v agar, pH 7.2) as yeast cells for 7 days at 36°C. Heterologous expression and purification of the PbMLS recombinant (PbMLSr) The cDNA encoding to PbMLS was obtained by Zambuzzi-Carvalho et al. [30] (GenBank accession number:AAQ75800). EcoRI and XhoI restriction sites were introduced in oligonucleotides to amplify a 1617 bp cDNA fragment of the Pbmls, which encodes a predicted protein of 539 amino acids. The PCR product was subcloned into the EcoRI/XhoI sites of the pET-32a(+) expression vector (Novagen, Inc., Madison, Wis.). The resulting plasmid was transferred to Escherichia coli BL21 C41 (DE3).

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