PPMO meaning
Peptide-conjugated phosphorodiamidate morpholino oligomers (PPMOs) represent a sophisticated class of synthetic molecules designed to precisely target and modulate gene expression作者：HM Moulton·2013·被引用次数：46—Morpholino oligos (Morpholinos)are widely used tools for knocking down gene expressionand are currently in a clinical trial for treatment of Duchene .... These compounds combine the sequence-specific binding capabilities of phosphorodiamidate morpholino oligomers (PMOs) with the enhanced cellular delivery provided by conjugated peptides. This conjugation strategy allows PPMOs to overcome limitations associated with traditional PMOs, such as poor cellular uptake, and opens new avenues for therapeutic intervention, particularly in combating antibiotic-resistant pathogens and genetic disorders.
The fundamental design of a PPMO involves an uncharged morpholino oligomer, which is structurally similar to DNA or RNA but resistant to nucleases, linked via a specific moiety to a peptide. This peptide component is often a cell-penetrating peptide (CPP), which facilitates the entry of the entire construct into target cells. Once inside, the PMO portion is designed to bind to specific messenger RNA (mRNA) sequences, thereby inhibiting protein translationPeptide-Conjugated Phosphorodiamidate Morpholino .... This mechanism of action is a cornerstone of antisense technology, offering a powerful way to "silence" disease-causing genes or restore normal gene function.
One of the most promising applications of PPMOs lies in their potential to combat the growing threat of multidrug-resistant bacteria. Traditional antibiotics often target essential bacterial processes, but resistance mechanisms can render them ineffective.作者：L Gan·2022·被引用次数：49—Phosphorodiamidate morpholino oligomers (PMOs) are an antisense RNA platform that is used clinically in patients with DMD to facilitate exon ... PPMOs offer a novel strategy by targeting bacterial genes that are critical for survival or for conferring resistancePeptide-conjugated phosphorodiamidate morpholino .... For instance, research has demonstrated that PPMOs can restore susceptibility to carbapenems in pathogens that possess New Delhi metallo-beta-lactamase 1 (NDM-1), a key enzyme responsible for broad-spectrum antibiotic resistance.Phosphorodiamidate morpholino oligomers (PMOs) restore the DMD reading frame, allowing for production of an internally truncated but functional dystrophin ... By specifically binding to and inhibiting the mRNA encoding such resistance factors, PPMOs can effectively neutralize the threat posed by these superbugs.作者：S Bittner·2023—PPMOs consist of anuncharged morpholino oligomer conjugated through a linker to a cell-penetrating peptide(CPP) and are designed to bind cellular RNAs ...
Furthermore, PPMOs are being explored as potential antisense antibiotics targeting essential genes in bacteriaBiological Efficacy of the Peptide-Conjugated .... Studies have shown their efficacy against pathogens like *Bacillus anthracis*, suggesting a broad applicability in treating bacterial infections where conventional antibiotics may fail. The ability of PPMOs to specifically target bacterial mRNA without affecting host cell processes offers a significant advantage in developing safer and more effective antimicrobial agents.
Beyond infectious diseases, PPMOs are also showing significant promise in the treatment of genetic disorders, most notably Duchenne muscular dystrophy (DMD). DMD is caused by mutations in the dystrophin gene, leading to a lack of functional dystrophin protein. PPMOs can be designed to target specific exons within the dystrophin mRNA, facilitating a process called exon skippingThe cellular uptake of PMOs (phosphorodiamidate morpholino oligomers) can be enhanced by theirconjugationto arginine-rich CPPs (cell-penetratingpeptides).. This allows the cell to "skip over" the mutated or faulty exon during protein synthesis, enabling the production of a truncated but partially functional dystrophin protein. This therapeutic strategy has already led to the clinical approval of PMO-based drugs for DMD, highlighting the transformative potential of this technologyPeptide-Conjugated Phosphorodiamidate Morpholino .... The conjugation of peptides further enhances the delivery and efficacy of these morpholino oligomers in preclinical models, offering hope for improved treatment outcomes.
The efficacy of PPMOs hinges on several key design principles. The morpholino oligomer sequence must be precisely complementary to its target mRNA to ensure specific binding. The linker connecting the PMO to the peptide is also crucial, influencing the stability and accessibility of both components. The choice of peptide is critical for efficient cellular uptake.2014年5月22日—Peptide Conjugated Phosphorodiamidate Morpholino OligomersIncrease Survival of Mice Challenged with Ames Bacillus anthracis · Medicine, Biology. Cell-penetrating peptides, such as those rich in arginine, are commonly employed due to their ability to translocate across cell membranes.
The development of PPMOs involves a careful balance of factors including sequence specificity, stability, cellular penetration, and potential toxicity2025年8月9日—Peptide-conjugated phosphorodiamidate morpholino oligomer (PPMO)restores carbapenem susceptibility to NDM-1-positive pathogensin vitro and in .... While PMOs themselves are generally resistant to degradation by nucleases, the conjugation to peptides and the overall structure can influence their pharmacokinetic properties.作者：S Bittner·2023—PPMOs consist of anuncharged morpholino oligomer conjugated through a linker to a cell-penetrating peptide(CPP) and are designed to bind cellular RNAs ... Ongoing research focuses on optimizing these parameters to maximize therapeutic benefit while minimizing off-target effects.
The field of peptide-conjugated phosphorodiamidate morpholino oligomers is rapidly evolvingNovel antisense oligonucleotide conjugates that cause exon skipping in the human dystrophin gene and their use in methods of treating Duchenne muscular .... Research continues to expand the scope of their applications, exploring their use in viral infections, cancer therapy, and other genetic conditions. Advances in peptide design and conjugation chemistry are leading to more potent and targeted PPMO constructs.
However, challenges remain.作者：E Kliuchnikov·2025—Synthesis of peptide-conjugated phosphorodiamidate morpholino oligonucleotides(PMOs) comprising 22 nucleobases (22-mer), 25 nucleobases (25-mer), and 30 ... Ensuring efficient and specific delivery to target tissues and cells in vivo, managing potential immunogenicity, and optimizing manufacturing processes for large-scale production are critical areas of ongoing investigation. Despite these hurdles, the unique mechanism of action and demonstrated therapeutic successes position PPMOs as a powerful and versatile platform for future drug development.
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