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Related Concept Videos

Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

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 acquisition...
Clinical Significance of Antibiotic Resistance01:25

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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 the One...
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Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

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...
Inhibitors of Gram-positive Cell Wall Synthesis01:23

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Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
Antibiotic Selection00:57

Antibiotic Selection

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Carbapenems: past, present, and future.

Krisztina M Papp-Wallace1, Andrea Endimiani, Magdalena A Taracila

  • 1Research Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio 44106, USA.

Antimicrobial Agents and Chemotherapy
|August 24, 2011
PubMed
Summary
This summary is machine-generated.

Carbapenem antibiotics are crucial in fighting infections due to their resistance to bacterial enzymes. Continued development of these potent drugs is essential for our antimicrobial arsenal.

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A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii
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Published on: January 2, 2017

Area of Science:

  • Medicinal Chemistry
  • Pharmacology
  • Infectious Diseases

Background:

  • Carbapenems are a vital class of beta-lactam antibiotics.
  • They exhibit unique resistance to beta-lactamase enzymes, crucial for combating bacterial resistance.
  • Their ability to inhibit beta-lactamases justifies their expanded use.

Purpose of the Study:

  • To review the current status of carbapenem antibiotics.
  • To discuss their discovery, development, and clinical applications.
  • To highlight challenges and future directions in carbapenem research.

Main Methods:

  • Literature review of carbapenem antibiotics.
  • Analysis of their chemical properties and mechanisms of action.
  • Summary of clinical use and development history.

Main Results:

  • Carbapenems are relatively resistant to hydrolysis by most beta-lactamases.
  • Thienamycin was the parent compound for subsequent carbapenems, with over 80 improved analogs described.
  • Key clinically used carbapenems include imipenem-cilastatin, meropenem, ertapenem, doripenem, panipenem-betamipron, and biapenem.

Conclusions:

  • Carbapenems possess unique properties making them valuable antimicrobial agents.
  • Despite challenges, ongoing development is urged for these potent and versatile compounds.
  • Carbapenems have been effective for over three decades and remain critical.