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Development of Antibiotic Resistance01:30

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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and...
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Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
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Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These...
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Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

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Resistance-resistant antibiotics.

Eric Oldfield1, Xinxin Feng1

  • 1Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.

Trends in Pharmacological Sciences
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

New strategies are needed to combat rising antibiotic resistance. This review explores six novel approaches for developing

Keywords:
antibioticsinnate immunityisoprenoidsmolecular dynamicsmultitargetingresistance

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Antibiotic Dereplication Using the Antibiotic Resistance Platform
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Area of Science:

  • Microbiology
  • Drug Discovery
  • Infectious Diseases

Background:

  • Increasing antibiotic resistance poses a global health threat.
  • Declining introduction of new antibiotics exacerbates the problem.

Purpose of the Study:

  • To review six innovative strategies for developing 'resistance-resistant' antibiotics.
  • To explore methods for overcoming antimicrobial resistance.

Main Methods:

  • Discussion of multitarget inhibitors.
  • Exploration of synergistic pathway inhibition.
  • Application of sequential virtual screening.
  • Repurposing existing drugs for combination therapy.
  • Consideration of non-protein targets.
  • Inhibition of virulence factors and boosting innate immunity.

Main Results:

  • Multitarget inhibitors offer a promising alternative to combination therapies.
  • Synergistic inhibition of metabolic pathways can enhance efficacy.
  • Virtual screening aids in discovering multitarget inhibitors.
  • Drug repurposing can create novel multitarget therapeutics.
  • Alternative targets beyond proteins are viable.
  • Virulence factor inhibition and immune boosting reduce resistance susceptibility.

Conclusions:

  • Several approaches can reduce the impact of antibiotic resistance mutations.
  • Restoring sensitivity to existing antibiotics in resistant organisms is possible.
  • While resistance cannot be eliminated, its effects can be mitigated.