Dataset Information

Cyclophostin and Cyclipostins analogues counteract macrolide-induced resistance mediated by Erm(41) in Mycobacterium abscessus

ABSTRACT: Mycobacterium abscessus is an emerging pathogen causing severe pulmonary infections, particularly in individuals with underlying conditions, such as cystic fibrosis or chronic obstructive pulmonary disease. Macrolides, including clarithromycin (CLR) and azithromycin (AZM), represent the current cornerstone of antibiotherapy against M. abscessus complex. However, prolonged exposure to macrolides can induce the apparition of Erm(41)-mediated resistance, limiting their spectrum of activity and often leading to therapeutic failure. Therefore, inhibiting Erm(41) could thwart this resistance mechanism to maintain macrolide susceptibility and avoid the therapeutic failure. In a previous study, the Erm(41) methyltransferase was identified as a target enzyme of Cyclipostins and Cyclophostin compounds (CyC). Herein, we took advantage of this feature to evaluate the in vitro activity of clarithromycin and azithromycin in combination with different CyC via the checkerboard assay on macrolide susceptible and induced macrolide-resistant M. abscessus generated by either clarithromycin or azithromycin exposure. Our results emphasize the use of the CyC to prevent/overcome Erm(41) induced resistance, restore macrolide susceptibility. This work should help to expand our therapeutic arsenal in the fight against a particularly antibiotic resistant mycobacterial species and could provide the opportunity to revisit the therapeutic regimen for combating M. abscessus pulmonary infections in CF patients, and particularly in erm(41)-positive strains.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Bacteria Mycobacterium Abscessus

DISEASE(S): Chronic Bronchitis

SUBMITTER: AUDEBERT Stephane

LAB HEAD: Dr. CANAAN Stephane

PROVIDER: PXD055560 | Pride | 2024-12-05

REPOSITORIES: Pride

ACCESS DATA

Dataset's files

Source:

Items per page:

1 - 5 of 61

Publications

Cyclophostin and Cyclipostins analogues counteract macrolide-induced resistance mediated by erm(41) in Mycobacterium abscessus.

Sarrazin Morgane M Poncin Isabelle I Fourquet Patrick P Audebert Stéphane S Camoin Luc L Denis Yann Y Santucci Pierre P Spilling Christopher D CD Kremer Laurent L Moigne Vincent Le VL Herrmann Jean-Louis JL Cavalier Jean-François JF Canaan Stéphane S

Journal of biomedical science 20241203 1

<h4>Background</h4>Mycobacterium abscessus is an emerging pathogen causing severe pulmonary infections, particularly in individuals with underlying conditions, such as cystic fibrosis or chronic obstructive pulmonary disease. Macrolides, such as clarithromycin (CLR) or azithromycin (AZM), represent the cornerstone of antibiotherapy against the M. abscessus species. However, prolonged exposure to these macrolides can induce of Erm(41)-mediated resistance, limiting their spectrum of activity and l ...[more]

PMID: 39623375

Similar Datasets

Project description:Members of the Mycobacterium (M.) abscessus complex (MABC) are rapidly growing mycobacteria showing smooth and/or rough colony morphotype. While not as virulent as M. tuberculosis, they can cause soft tissue infection and fatal pulmonary disease, especially in patients with cystic fibrosis. Diagnosing MABC pulmonary disease is challenging since the isolation of M. abscessus from respiratory samples is in itself not diagnostic and the clinical features are often non-specific. Immunologic assays, which could aid in the understanding and diagnosis of the disease, are not available. In this study eight rough and six smooth colony morphotype isolates were collected from seven clinical MABC strains and the M. abscessus reference strain ATCC19977, as six strains showed both morphotypes simultaneously and two strains only showed a rough morphotype. Clinical isolates were submitted to whole genome sequencing. Quantitative proteomic analysis was performed on bacterial lysates and the culture supernatant of all 14 isolates. Supernatant proteins present in all isolates were compared in a BLAST search against other clinically significant mycobacterial species to determine species-specific proteins of MABC. In silico B- and T-cell epitope prediction was performed for species-specific proteins. All clinical strains were found to be M. abscessus ssp. abscessus. Six of seven rough colony clinical isolates contained genetic changes in the MAB_4099c gene, which is a likely genetic basis for the rough morphotype. Proteomic analysis detected 3 137 different proteins in total of which 79 proteins were found in the culture supernatants of all isolates. BLAST analyses of these 79 proteins identified 12 of those exclusively encoded by all members of MABC plus M. immunogenum. In silico prediction of epitopes predicted B- and T-cell epitopes in all these 12 species-specific proteins, rendering them promising candidates for future studies on immune pathogenesis and immune diagnostic tools for MABC disease.

Project description:To advance understanding of mechanisms leading to biological and transcriptional endpoints related to estrogen action in the mouse uterus, we have mapped ERM-NM-1 and RNA polymerase II binding sites using chromatin immunoprecipitation (ChIP) followed by sequencing of enriched chromatin fragments (ChIP-seq). In the absence of hormone, 5184 ERM-NM-1 binding sites were apparent in the vehicle treated ovariectomized uterine chromatin, while 17240 were seen one hour after estrogen (E2) treatment, indicating that some sites are occupied by unliganded ERM-NM-1, and that ERM-NM-1 binding is increased by E2. Approximately 15% of the uterine ERM-NM-1 binding sites were adjacent to (<10 KB) annotated transcription start sites and many sites are found within genes or are found more than 100 KB distal from mapped genes; however, the density (sites per bp) of ERM-NM-1 binding sites is significantly greater adjacent to promoters. An increase in quantity of sites but no significant positional differences were seen between vehicle and E2 treated samples in the overall locations of ERM-NM-1 binding sites either distal from, adjacent to or within genes. Analysis of the PolII data revealed the presence of poised promoter proximal PolII on some highly upregulated genes. Additionally, co-recruitment of PolII and ERM-NM-1 to some distal enhancer regions was observed. A de novo motif analysis of sequences in the ERM-NM-1 bound chromatin confirmed that estrogen response elements (EREs) were significantly enriched. Interestingly, in areas of ERM-NM-1 binding without predicted ERE motifs, homeodomain transcription factor (Hox) binding motifs were significantly enriched. The integration of the ERM-NM-1 and PolII binding sites from our uterine ChIP-seq data with transcriptional responses revealed in our uterine microarrays has the potential to greatly enhance our understanding of mechanisms governing estrogen response in uterine and other estrogen target tissues. one sample each, vehicle ER-alpha ChIP seq,1 hour estradiol ER-alpha ChIP seq, vehicle RNA polymerase II ChIP seq,1 hour estradiol RNA polymerase II ChIP seq, input DNA

Project description:ChIP-seq from mice with DNA binding mutations in Esr1 (KIKO mouse). Estrogen Receptor M-NM-1 (ERM-NM-1) interacts with DNA, directly, or indirectly via other transcription factors, referred to as M-bM-^@M-^\tetheringM-bM-^@M-^]. Evidence for tethering is based on in vitro studies and a widely used M-bM-^@M-^\KIKOM-bM-^@M-^] mouse model containing mutations that prevent direct estrogen response element (ERE) DNA-binding. KIKO mice are infertile, due in part to the inability of estrogen (E2) to induce uterine epithelial proliferation. To elucidate the molecular events that prevent KIKO uterine growth, regulation of the pro-proliferative E2 target gene Klf4, and of Klf15, a progesterone (P4) target gene that opposes KLF4M-bM-^@M-^Ys pro-proliferative activity, were evaluated. Klf4 induction was impaired in KIKO uteri; however, Klf15 was induced by E2 rather than by P4. Whole uterine ChIP-seq revealed enrichment of KIKO ERM-NM-1 binding to hormone response elements (HRE), motifs. KIKO binding to HRE motifs was verified using reporter gene and DNA-binding assays. Because the KIKO ERM-NM-1 has HRE DNA-binding activity, we evaluated the M-bM-^@M-^\EAAEM-bM-^@M-^] ERM-NM-1, which has more severe DBD mutations, and demonstrated lack of ERE or HRE reporter gene induction or DNA binding. The EAAE mouse has an ERM-NM-1-null like phenotype, with impaired uterine growth and transcriptional activity. Our findings demonstrate that the KIKO mouse model, which has been used by numerous investigators, cannot be used to establish biological functions for ERM-NM-1 tethering, as KIKO ERM-NM-1 effectively stimulates transcription using HRE motifs. The EAAE-ERM-NM-1 DBD mutant mouse demonstrates that ERM-NM-1 DNA-binding is crucial for biological and transcriptional processes in reproductive tissues, and that ERM-NM-1-tethering may not contribute to estrogen-responsiveness in vivo. one sample each, vehicle ER-alpha ChIP seq,1 hour estradiol ER-alpha ChIP seq, vehicle RNA polymerase II ChIP seq,1 hour estradiol RNA polymerase II ChIP seq, input DNA

			Action	DRS
	AZM_05_24_rep1.raw	Raw
	AZM_05_24_rep1_20230907010810.raw	Raw
	AZM_05_24_rep2.raw	Raw
	AZM_05_24_rep2_20230905005457.raw	Raw
	AZM_05_24_rep3.raw	Raw