oral delivery of proteins and peptides oral delivery of proteins and peptides - Oral delivery of proteins andpeptides: challenges, status quoandfuture perspectives protein peptides Advancing Oral Delivery of Proteins and Peptides: Overcoming Biological Barriers

Materials fororal delivery of proteins and peptides The oral delivery of proteins and peptides presents a significant frontier in pharmaceutical development, offering a more convenient and patient-friendly alternative to traditional injectable therapies. While proteins and peptides (PPs) hold immense therapeutic potential due to their high selectivity and efficacy, their direct administration via the oral route faces substantial hurdles作者：VP Chavda·2025·被引用次数：2—This chapter focuses on the advancements and challenges in theoral delivery of protein and peptide-based drugs, highlighting the innovative strategies being .... These include enzymatic degradation within the gastrointestinal tract and poor permeability across the intestinal epithelium, leading to low bioavailability and limited therapeutic outcomes. Overcoming these challenges is crucial to unlocking the full promise of protein and peptide-based drugs.

The Fundamental Challenges of Oral Protein and Peptide Delivery

The gastrointestinal (GI) tract is inherently designed to break down large molecules, including proteins and peptides, into smaller components like amino acids.Current Advancements on Oral Protein and Peptide Drug ... Upon ingestion, these biomolecules are exposed to a harsh environment characterized by acidic conditions in the stomach and a battery of digestive enzymes, such as proteases, which rapidly degrade them. This enzymatic degradation is a primary reason why many protein and peptide therapeutics are currently administered parenterally.

Beyond enzymatic breakdown, the intestinal barrier itself poses a significant obstacle. The intestinal epithelium, with its tight junctions and mucus layer, acts as a selective gatekeeper, preventing the passage of large molecules into the bloodstream. Even if proteins and peptides survive digestion, their ability to permeate this barrier is severely limited, resulting in very low systemic absorption. Factors affecting protein and peptide absorption are therefore central to understanding these delivery challenges.

Innovative Strategies to Enhance Oral Bioavailability

To circumvent these physiological barriers, researchers are developing a diverse array of strategies aimed at protecting proteins and peptides from degradation and facilitating their absorption作者：X Wang·2024·被引用次数：21—This article reviews the key factors influencing the absorption efficiency oforalbioactivepeptides, including issues related to bitter taste perception.. These approaches can be broadly categorized into formulation strategies, material science innovations, and advanced delivery systems.Nanoparticles: Oral Delivery for Protein and Peptide Drugs

#### Advanced Formulation and Material Approaches

A key area of research focuses on developing protective formulations. This includes:

* Coating and Encapsulation: Enteric coatings can protect drugs from stomach acid, releasing them in the more neutral environment of the intestine.作者：SP Victor·2014·被引用次数：8—This technology has en- abled theoral delivery of proteins, peptides, and some macromolecules. At present,. Emisphere maintains a library of more than 1,800 ... Encapsulation within various nanocarriers, such as liposomes and nanoparticles, can shield proteins and peptides from enzymatic attack and improve their interaction with the intestinal lining. Solid lipid nanoparticles, for instance, are being explored for their ability to enhance oral bioavailability.

* Absorption Enhancers: The use of absorption enhancers aims to temporarily increase the permeability of the intestinal epithelium. These enhancers can disrupt tight junctions or facilitate paracellular or transcellular transport of the therapeutic molecules.

* Chemical Modification: Modifying the protein or peptide itself, or the nanocarriers used for delivery, can improve stability and enhance absorption. This might involve conjugating the therapeutic molecule to a carrier or altering its surface properties.

#### Emerging Delivery Technologies

Beyond traditional formulations, novel technologies are emerging to facilitate oral protein and peptide delivery:

* Microneedles: While often associated with transdermal delivery, microneedles are also being investigated for oral applications. Their ability to penetrate the mucosal and epithelial layers of the oral cavity or intestinal lining offers a potential pathway for direct drug absorption, bypassing some of the harsher GI conditions.

* Macrovehicle Systems: Platforms utilizing macrovehicles like capsules or tablets, often with specialized coatings, are designed to improve the oral delivery of proteins and peptides.作者：S Gupta·2013·被引用次数：192—Oral delivery of therapeutic proteins/peptideshas always been a significant challenge for researchers due to their poor plasma levels. Owing to ... These systems aim to optimize drug release and absorption profiles.作者：A Jash·2021·被引用次数：142—This review provides an overview of thecurrent approaches and challenges associated with the routes and methods oforal administration of protein/peptide- ...

* Smart Delivery Systems: Innovative "smart" delivery systems are being developed that respond to the physiological conditions within the GI tract, releasing the therapeutic payload only when and where it is most effectively absorbed作者：Q Zhu·2021·被引用次数：335—The current strategies for improvingoralabsorption ofproteins and peptides(PPs) include stabilization, absorption enhancement and mucus-related ....

The Promise of Oral Delivery for Therapeutic Proteins and Peptides

The successful development of effective oral delivery systems for proteins and peptides would represent a paradigm shift in medicine. It would not only enhance patient convenience and adherence but also potentially reduce healthcare costs associated with injectable therapies. The ongoing research into overcoming the inherent challenges of the oral route—from enzymatic degradation to intestinal barrier penetration—is paving the way for a new generation of accessible and effective protein and peptide-based therapeutics. The progress in this field highlights how advancements in materials, formulation science, and drug delivery technologies are critical to unlocking the full therapeutic potential of these complex biomolecules.