Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR13194441.fastq.gz | Fastqsanger.gz | |||
| ERR13194442.fastq.gz | Fastqsanger.gz | |||
| ERR13341318.fastq.gz | Fastqsanger.gz |
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Project description:Analysis of MyD88 as a putative mediator in host-microbe-interactions
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Project description:Recent evidence has revealed that a high-fat diet (HFD) can promote the development of tumours, especially colorectal cancer (CRC), by affecting the microbiota. Regulatory circular RNAs (circRNAs) play an important role in modulating host–microbe interactions. However, the specific mechanism by which circRNAs affect cancer progression by regulating these interactions is not yet clear. Here, we report that consumption of a HFD modulates the microbiota by specifically upregulating the expression of the noncoding RNA hsa_circ_0126925 (herein referred to as circ_0126925) in CRC. As a scaffold, circ_0126925 hinders the recruitment of the E3 ubiquitin ligase tripartite motif-containing protein 21 (TRIM21) to branched-chain amino acid transaminase 2 (BCAT2), which leads to reduced degradation of BCAT2. Reducing the targeted degradation of BCAT2 can protect tumours from limited branched-chain amino acids (BCAAs) interference by improving the metabolism of BCAAs in CRC. Taken together, these data demonstrate that circ_0126925 plays a critical role in promoting the progression of CRC by maintaining BCAA metabolism and provide insight into the functions and crosstalk of circ_0126925 in host–microbe interactions in CRC. Taken together, these data demonstrate that circ_0126925 plays a critical role in promoting the progression of CRC by maintaining BCAA metabolism and provide insight into the functions and crosstalk of circ_0126925 in host–microbe interactions in CRC.
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Project description:Oral health is associated with a symbiotic microbial community and host-microbe homeostasis is maintained by the controlled immune response. Various factors can disrupt this homeostasis. Dysbiosis, which is characterized by increased immune response and a shift in the microbiome, contributes the pathogenesis of peri-implantitis. Peri-implant mucosa and commensal bacteria play important roles in the maintenance of host-microbe homeostasis, but little is known about how they interact. We have therefore investigated the early host-microbe interaction between a commensal multispecies biofilm (Streptococcus oralis, Actinomyces naeslundii, Veillonella dispar, Porphyromonas gingivalis) and peri-implant mucosa at 24 and 48 h. Our in vitro peri-implant mucosa-biofilm model contained organotypic oral mucosa, implant material and biofilm. After 24 h, the biofilm induced a modest innate immune response in the peri-implant mucosa by the upregulation of 5 genes related to immune and inflammatory response and the increased secretion of IL-6 and CCL20. This controlled immune response protected tissue integrity and the peri-implant mucosa remained intact. The secreted antibacterial proteins human β-Defensins-1, -2, and CCL20 controlled the overgrowth of the biofilm by reducing its volume - without affecting the live/dead ratio or bacterial distribution. Thus, host-microbe homeostasis was established within the first 24 h. In contrast, host-microbe homeostasis was disrupted after 48 h. The mucosa was damaged and detached from the implant, due to the induced downregulation of cell adhesion related genes. The immune response was enhanced by upregulation of additional genes related to the immune and inflammatory response and increased secretion of IL-1β, TNF-α, and CCL20. Moreover, bacterial distribution was altered, with an increased proportion of V. dispar. The disrupted host-microbe homeostasis could lead to incipient dysbiosis. This deeper understanding of the early host-microbe interaction at the peri-implant site may provide the basis for new strategies to improve the prevention and therapy of peri-implant diseases.
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