Antibiofim effect of Triazole-Pd membranes
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB12586 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR1232600.fastq.gz | Fastqsanger.gz | |||
| ERR1232610.fastq.gz | Fastqsanger.gz | |||
| ERR1232601.fastq.gz | Fastqsanger.gz | |||
| ERR1232611.fastq.gz | Fastqsanger.gz | |||
| ERR1232602.fastq.gz | Fastqsanger.gz |
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Project description:Safe and efficient antibacterial materials are urgently needed to combat drug-resistant bacteria and biofilm-associated infections. The rational design of nanoparticles for flexible elimination of biofilms by alternative strategies remains challenging. Herein, we propose the fabrication of Janus-structured nanoparticles targeting extracellular polymeric substance to achieve dispersion or near-infrared (NIR) light-activated photothermal elimination of drug-resistant biofilms, respectively. Asymmetrical Janus-structured dextran-bismuth selenide (Dex-BSe) nanoparticles are fabricated by a facile strategy to exploit synergistic effects of both components. The biocompatible dextran domain with the maximum exposure endows the Janus nanoparticles with biofilm penetration, targeting, and dispersion functions. Interestingly, Janus Dex-BSe nanoparticles realize enhanced dispersal of biofilms over time compared with dextran nanoparticles while the underlying molecular mechanisms are further revealed by RNA-sequencing transcriptomics analysis. Alternatively, taking advantage of the preferential accumulation of nanoparticles at infection sites, the self-propelled active motion induced by the unique Janus structure enhances the photothermal killing effect under NIR light irradiation, thereby eradicating the biofilm. Given these favorable features, the antibiofilm activity of Janus Dex-BSe against methicillin-resistant Staphylococcus aureus (MRSA) was first validated in vitro. More importantly, the flexible application of Janus Dex-BSe nanoparticles for biofilm removal or NIR-triggered eradication in vivo was demonstrated by MRSA-infected mouse excisional wound model and abscess model, respectively. The currently developed Janus nanoplatform holds great promise for the efficient elimination of drug-resistant biofilms in diverse antibacterial scenarios.
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Project description:Approximately 25% of all preterm births are due to preterm premature rupture of membranes. Mice deficient in proteoglycans biglycan (Bgn) and decorin (Dcn) display abnormal fetal membranes and increased incidence of preterm birth. We conducted RNA-Seq to profile fetal membranes and identify molecular pathways that may lead to preterm birth in double knockout (DKO) mice (Bgn −/−; Dcn −/− ) compared to wild-type (WT) at two different gestational stages, E12 and E18 (n=3 in each group). 3264 transcripts were differentially regulated in E18 DKO vs. WT fetal membranes, and 96 transcripts differentially regulated in E12 DKO vs. WT fetal membranes (FDR<0.05, log 2 FC≥1). Differentially regulated transcripts in E18 DKO fetal membranes were significantly enriched for genes involved in cell cycle regulation, extracellular matrix-receptor interaction, and the complement cascade. 50 transcripts involved in the cell cycle were altered in E18 DKO fetal membranes (40↓, 10↑, FDR<0.05), including p21 and p57 (↑), and Tgfb2, Smad3, CycA, Cdk1, and Cdk2(↓). Thirty-one transcripts involved in the complement cascade were altered (11↓, 20↑, FDR<0.05) in E18 DKO fetal membranes, including C1q, C2, and C3 (↑). Differentially expressed genes in the top three molecular pathways (1) showed evidence of negative or purifying selection, and (2) were significantly enriched (Z-score>10) for transcription factor binding sites for Nr2f1 at E18. We propose that in DKO mice, cell cycle arrest results in lack of cell proliferation in fetal membranes, inability to contain the growing fetus, and preterm birth.
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Project description:Objective. To identify novel monosodium urate (MSU) crystal-induced mRNAs by transcript profiling of isolated murine air pouch membranes. Methods. Nine hours after injecting crystals into air pouches, membranes were meticulously dissected away from the adjacent soft tissues. mRNA expression differences between inflamed and control membranes were determined by oligonucleotide microarray analysis. Induction of selected mRNAs was validated by real-time relative quantitative reverse transcriptase PCR (qPCR) in pouch membranes and murine peritoneal macrophages. Results. Eleven of the 12 most highly upregulated mRNAs related to innate immunity and inflammation. They included mRNAs encoding histidine decarboxylase (the enzyme that synthesizes histamine), interleukin (IL)-6, the cell surface receptors PUMA-g and TREM-1, and the polypeptides Irg1 and PROK-2. MSU crystals induced dramatic rises in these mRNAs in the pouch membrane within 3-8 hours after the surge in pro-inflammatory cytokine (IL-6, IL-1beta and TNFalpha) and immediate early gene (Egr-1) transcription, which occurred 1h after crystal injection. MSU crystals induced these mRNAs in cultured macrophages with similar kinetics but lower fold changes. In keeping with their downregulation by MSU crystals according to the microarrays, qPCR confirmed that TREM-2 and granzyme D mRNAs decreased 79% and 94%, respectively, in MSU crystal inflamed membranes. Conclusions. This analysis disclosed several genes previously not implicated in MSU crystal inflammation. Their rise after the early surge in cytokine mRNAs suggests that they may, for instance, amplify or perpetuate inflammation. Transcript profiling of the isolated air pouch membrane promises to be a powerful tool to identify genes acting at different stages of inflammation. Experiment Overall Design: Mouse strain: female Balb/C, 6-8 weeks old Experiment Overall Design: Number of mice= 6. Experiment Overall Design: Air pouches raised on back for 7 days by injecting 2ml of sterile air. Experiment Overall Design: On day 7, injection of 1ml PBS or 2mg MSU crystals in 1ml PBS (n=3 each) Experiment Overall Design: 9 h after injection, dissection of the air pouch membranes from the adjacent soft tissues, RNA extraction with RNeasy columns. Pooling of RNA from the 3 control pouches or the 3 MSU crystal pouches. Processing and labeling of 5ug aliquots in the U Penn microarray core according to standard Affy protocols. Hybridization to Affy Mo430_2 oligonucleotide microarrays.
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