Clinical trial NCT06628076: Antibacterial Effect of Zinc Oxide Nanoparticles on Acinetobacter Baumannii Isolated from Patients with Hospital Acquired Infections in Sohag University Hospitals, Egypt
Official title: Antibacterial Effect of Zinc Oxide Nanoparticles on Acinetobacter Baumannii Isolated from Patients with Hospital Acquired Infections in Sohag University Hospitals, Egypt
Study type: OBSERVATIONAL
Overall status: NOT_YET_RECRUITING
Conditions: Infections, Nosocomial
Infections, Respiratory Tract
Keywords: A. baumannii.
Biofilm
ZnO NPs
hospital aquired infections
Lead sponsor: Sohag University
Sponsor class: OTHER
First posted: 2024-10-04
Enrollment: 150
Sex: ALL
Maximum age (years): 90
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_CONTROL
Time perspective: CROSS_SECTIONAL
Sampling method: PROBABILITY_SAMPLE
Study population: This study will be carried out at Department of Medical Microbiology and Immunology, Sohag Faculty of Medicine and Sohag University Hospitals.

Brief summary: A. baumannii is known as the most frequently isolated organism in intensive care units (ICUs), causing a variety of nosocomial infections, including pneumonia, urinary tract infections (UTIs), bacteremia as well as skin and soft tissue infections. These infections are usually associated with high mortality rates ranging between 26% among hospitalized patients and 43% among ICU patients.

Detailed description: Acinetobacter baumannii (A. baumannii) is Gram- negative, aerobic, glucose non-fermentative, non-motile coccobacillus, ubiquitous in nature, and persistent in healthcare settings. It is regarded as a significant opportunistic human pathogen.

This bacterium become a growing problem in hospitals as a predominant multidrug-resistant (MDR) bacterium. Horizontal acquisition of resistance genes is the main factor involved in the emergence of MDR .

There are many mechanisms to confer resistance to different classes of antibiotics in A. baumannii, one of them is multidrug efflux pumps. These efflux pumps are important source of MDR, which export antibiotics from the cell, increasing their antibiotic resistance.

AdeABC is one of the most important efflux systems, belonging to the RND family in Acinetobacter, which plays an important role in the resistance to a broad group of antibiotics; its genes are chromosomal and encode three genes, i.e., AdeB, AdeA, and AdeC, forming an operon in the vicinity. In addition, the expression of AdeABC is done by a two-component system, which includes a response regulator (AdeR) and a sensor kinase (AdeS) .

The ability of Acinetobacter spp. to form biofilm that enables bacterial survival in hospital settings, especially in ICUs, is the most significant contributing factor to their virulence, and this trait is also responsible for their notable antibiotic resistance. Several biofilm-related genes influence antimicrobial susceptibility, suggesting an association between the biofilm-forming ability of Acinetobacter spp. and their antibiotic resistance patterns (MDR/XDR)

Zinc oxide nanoparticles (ZnO NPs) are one of the most important nanoparticles of metal oxides; it is a unique and inorganic materials that can be used in several biological applications (anti-bacterial, anti-inflammatory). ZnO NPs exhibit distinctive properties other than other nanoparticles such as higher solubility, better biofilm penetration and effective drug delivery . ZnO NPs have been reported to have antimicrobial properties such as disrupting the cell membrane of pathogens, accumulating in the cell and producing toxic H2O2 (hydrogen peroxide)

Eligibility criteria: Inclusion Criteria:

* All patients suffering from infections that can be caused by A. baumannii.

Exclusion Criteria:

* All patients suffering from infections that aren\&#39;t caused by A. baumannii.

Primary outcomes:
measure: A. baumannii antibiotic susceptibility profile
timeFrame: October 2024 to December 2025
measure: Isolation and identification of A. baumannii from different clinical samples
timeFrame: October 2024 to December 2025
measure: A. baumannii strains which produce biofilm
timeFrame: October 2024 to December 2025
measure: Ability of ZnO NPs to inhibit the phenomenon of biofilm formation by MDR A. baumannii strains
timeFrame: October 2024 to December 2025
measure: The effect of ZnO NPs on the expression of some efflux pump genes and biofilm related genes in MDR A. baumannii strains
timeFrame: October 2024 to December 2025
Secondary outcomes:
Other outcomes:
Locations:
city: Sohag
country: Egypt
facility: Sohag university, Faculty of medicine
Study officials:
References: