Recent advances in the field of 16-membered macrolide antibiotics

W Cui1, S Ma

  • 1Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, P.R. China.

Insights

This review highlights 16-membered macrolide antibiotics, focusing on their potential as new antibacterials. It explores their advantages, mechanisms of action, and resistance to aid in novel drug design.

Area of Science:

  • Medicinal Chemistry
  • Pharmacology
  • Microbiology

Background:

  • Rising bacterial resistance necessitates novel antibacterial agents.
  • Macrolide antibiotics are a key class, with renewed interest in 16-membered variants.
  • 16-membered macrolides offer potential advantages over 14-membered counterparts.

Purpose of the Study:

  • To review representative 16-membered macrolide antibiotics and their analogs.
  • To elucidate the mechanisms of action and resistance for these compounds.
  • To provide insights for future antibacterial drug design.

Main Methods:

  • Literature review of recent research on 16-membered macrolide antibiotics.
  • Analysis of structural features, medicinal potential, and pharmacological properties.
  • Examination of bacterial resistance mechanisms and drug action.

Main Results:

  • 16-membered macrolides exhibit favorable properties like improved gastrointestinal tolerability and structural flexibility.
  • They present a reduced risk of inducible resistance compared to some other macrolides.
  • Recent analogs show promise for development as novel antibacterial drugs.

Conclusions:

  • 16-membered macrolides represent a promising scaffold for developing new antibacterial therapies.
  • Understanding their action and resistance mechanisms is crucial for optimizing drug design.
  • Further exploration of these compounds is warranted to combat bacterial resistance.

Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

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...
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...
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

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

Inhibitors of Gram-positive Cell Wall Synthesis

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...
Production of Antibiotics01:27

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...