Project description:Purpose: The goal of this study was to elucidate the collateral effects associated with OXA-23 overexpression on the Acinetobacter baumannii global transcriptome. Results: Besides the 99.73-fold increase in blaOXA-23 transcript upon IPTG induction, no other transcripts showed more than a 2-fold change compared to the wildtype control. This suggests that OXA-23 over expression to levels similarly observed in multi drug resistant A. baumannii clinical isolates does not effect the transcriptome.
Project description:In the present study, we investigated miRNA expression changes caused by aquired chemoresistance to 5-FU or Oxa. 40 and 14 miRNAs were detected as differentially expressed in 5-fluouracil- and oxaliplatin-resistant colorectal HCT116 sublines, respectively. Differentially expressed miRNAs determined in the present study could be applied for further development of diagnostic and therapeutic applications for colorectal cancer carcinoma resistant to 5-FU or Oxa.
Project description:Purpose: We performed RNA sequencing (RNA-seq) analysis to investigate the role of ZCCHC4 in regulating OXA-induced genes in HepG2 cells. The goal of this study is to investigate the biological effect of ZCCHC4 in HCC progression and prognosis, and we have found that ZCCHC4 could promote chmoresistance of HCC to DNA damage agents including OXA, we conducted RNA-seq to figure out more clues for deep mechanisms.
Project description:The nosocomial pathogen Acinetobacter baumannii is a frequent cause of hospital acquired infections worldwide, and a challenge for treatment due to its evolved resistance to antibiotics, including carbapenems. To gain insight on A. baumannii antibiotic resistance mechanisms, we analyzed the protein interaction network of a multidrug-resistant A. baumannii clinical strain Ab5075. Using in vivo chemical cross-linking and mass spectrometry, we identified 2,068 non-redundant cross-linked peptide pairs containing 245 intra- and 398 inter- molecular interactions. Outer membrane proteins OmpA and YiaD, and carbapenemase Oxa-23 are hubs of the identified interaction network. Eighteen novel interactors of Oxa-23 were identified. Interactions of Oxa-23 with outer membrane porins OmpA and CarO were verified with co-immunoprecipitation analysis. Furthermore, transposon mutagenesis of oxa-23 or interactors of Oxa-23 demonstrated changes in meropenem or imipenem sensitivity in Ab5075. These results provide the first view of a porin-localized toxin inactivation model and increase understanding of bacterial antibiotic resistance mechanisms.
Project description:Primary objectives: Analysis of chemotherapy toxicity given through i.p. during NIPEC-OXA throughout the entire treatment period, including a 3-month follow-up.
Primary endpoints: Adverse Event meassured by CTCAE 5.0
Project description:Feasibility study regarding 20 Patients with peritoneal metastases from colorectal cancer treated with cytoreductive surgery and HIPEC and subsequently with 4 courses of normothermic intraperitoneal chemotherapy - long term (NIPEC-OXA) with oxaliplatin.
