antimicrobial peptides pore formers or metabolic inhibitors in bacteria antibacterial - edge-peptides-reddit Peptide Antimicrobial Peptides: Pore Formers or Metabolic Inhibitors in Bacteria?

ole-henriksen-pout-preserve-peptide-lip-treatment-review Antimicrobial peptides (AMPs) represent a crucial component of the innate immune system, serving as a first line of defense against invading pathogens作者：CB Park·1998·被引用次数：1244—Buforin II inhibits the cellular functions by binding to DNA and RNA of cells after penetrating the cell membranes, resulting in the rapid cell death.. These small, naturally occurring proteins are found across a vast spectrum of life forms, from microorganisms to humans, and exhibit potent antibacterial activities. A key area of research and discussion within the scientific community revolves around the precise mechanisms by which these peptides exert their antimicrobial effects. Specifically, the question of whether antimicrobial peptides primarily function as pore formers or metabolic inhibitors in bacteria remains a central theme.

The review by K.A. Brogden in 2005, titled "Antimicrobial peptides: pore formers or metabolic inhibitors in bacteria?", is frequently cited (over 7600 times) and highlights the diverse models proposed for antimicrobial-peptide-induced pore formation and subsequent cell killing.Antimicrobial Peptides This foundational work underscores that AMPs are not a monolithic group with a single mode of action. Instead, their mechanisms can be varied and complex, often depending on the specific peptide's structure, charge, secondary structure, and the bacterial species targeted作者：R Deb·2024·被引用次数：16—(7,8) Antimicrobial peptides (AMPs), whichcan rapidly kill bacteria by forming poresin bacterial cell membranes, have the potential to become ....

One prominent mechanism involves the disruption of bacterial membranes作者：AA Bahar·2013·被引用次数：2029—Brogden, K.A.Antimicrobial peptides: Pore formers or metabolic inhibitors in bacteria? Nat. Rev. Microbiol. 2005, 3, 238–250. [Google Scholar]; Park, C.B. .... Many antimicrobial peptides, such as alamethicin, cecropin, PGLa, magainin, melittin and mastoparan, are characterized by their ability to interact with and permeabilize the microbial cell membrane. This often leads to the formation of pores, which disrupt the electrochemical gradient across the membrane.Antimicrobial peptideshave been demonstrated to kill Gram negative and Gram positive bacteria, enveloped viruses, fungi and even transformed or cancerous cells ... This disruption can cause leakage of essential intracellular components, leading to cell death.Brogden, K.A. (2005) Antimicrobial Peptides Pore Formers ... For instance, cecropins are known to form pores in bacterial membranes, causing membrane depolarization.作者：N Saigo·2019·被引用次数：25—This study describes a technical platform that allows us to measure thepore-forming activity ofantimicrobial peptides(AMPs) in the lipid bilayer and ... Similarly, other cationic antimicrobial peptides can cause inhibition through pore formation, as evidenced by studies and research into their mechanisms. The ability of AMPs to rapidly kill bacteria by forming pores in their cell membranes positions them as promising candidates for novel therapeutic agentsAMPs have strongantibacterialactivities against a very broad spectrum of microorganisms, including G+ and G−bacteria, fungi, and even viruses..

However, the narrative is not solely confined to membrane disruption. Emerging research suggests that certain antimicrobial peptides also possess the capacity to act as metabolic inhibitors作者：J Lei·2019·被引用次数：1619—AMPs usually form a helix structure, act through the bacterial cell membrane, form ion channels orporeson the microbial membranes, leading to membrane .... This alternative mechanism involves interfering with essential intracellular processes within the bacteria. Evidence indicates that some peptides can directly inhibit the actions of specific ATP-dependent enzymes, such as firefly luciferase and DnaK, as demonstrated in studies involving short cationic AMPs interacting with ATP. Furthermore, some AMPs can inhibit biofilm formation by disrupting the signaling pathways of bacterial cells, including encouraging bacteria to produce guanosine tetraphosphate (ppGpp), a molecule involved in stress response and gene regulation作者：J Lei·2019·被引用次数：1619—AMPs usually form a helix structure, act through the bacterial cell membrane, form ion channels orporeson the microbial membranes, leading to membrane .... These findings suggest that AMPs can act directly against invading pathogens not only through membrane disruption but also by interfering with vital metabolic functions.

The complexity of AMP action is further illustrated by the continuous development of research into their efficacy. For example, in computational design, models like AFP-GFuse performs best, outperforming other baseline models, indicating advancements in understanding and potentially engineering these peptides for enhanced activity. This ongoing exploration aims to leverage AMPs as potential pharmaceuticals for treating antibiotic-resistant bacterial infections or even septic shock, as recognized by researchers like K.作者：N Saigo·2019·被引用次数：25—This study describes a technical platform that allows us to measure thepore-forming activity ofantimicrobial peptides(AMPs) in the lipid bilayer and ...A. Brogden. The broad spectrum of activity of AMPs is significant, as they have been demonstrated to kill Gram negative and Gram positive bacteria, as well as fungi, enveloped viruses, and even transformed or cancerous cells. Their ability to broadly inhibit common harmful bacteria makes them a particularly attractive area of study.作者：K Hilpert·2010·被引用次数：100—Here we show that thesepeptidesinteract with ATP and directly inhibit the actions of certain ATP-dependent enzymes, such as firefly luciferase, DnaK, and DNA ...

In conclusion, the question of whether antimicrobial peptides are primarily pore formers or metabolic inhibitors in bacteria is not an either/or scenario. While pore formation remains a well-established and significant mechanism for many AMPs, directly leading to cell death, evidence increasingly supports the role of metabolic inhibition as another crucial mode of actionAntimicrobial peptides: Pore formers or metabolic inhibitors .... The precise mechanism can be peptide-specific and context-dependent, highlighting the intricate and multifaceted nature of these vital components of the innate immune system. Further research continues to unravel the complete scope of their actions, paving the way for novel therapeutic strategies against challenging bacterial infections.