Postbiotics have emerged as a novel category of biotics that offer potential health benefits without the need for living cells, distinguishing them from probiotics and bypassing food safety regulations that pertain to live microorganisms. Defined as preparations of inanimate microorganisms and/or their components conferring health benefits, postbiotics encompass various biomolecules such as short-chain fatty acids, exopolysaccharides, vitamins, and enzymes within non-purified inactive cell preparations. Although still in its early stages, research on postbiotics indicates their capacity to modulate human health, particularly in enhancing gut health, reducing inflammation, and combatting gut pathogens. This review delves into the current understanding of postbiotics, their commercial applications, and the research gaps necessitating further exploration for potential future postbiotic applications.
The human microbiome, spanning various niches like the gut, skin, vagina, and oral cavity, plays a pivotal role in human health and disease. Traditionally, efforts have focused on identifying microbes inhabiting these niches to develop biotic therapies like antibiotics and probiotics aimed at altering microbial compositions to influence health conditions. Antibiotics, while effective against pathogens, indiscriminately disrupt microbiomes, potentially leading to dysbiosis and further health complications. On the other hand, probiotics, comprising live microorganisms, face challenges in viability during gastrointestinal transit, hindering long-term colonization and efficacy in modulating the gut microbiome. However, recent insights suggest that the health benefits attributed to probiotics stem not only from live microbes but also from their metabolites and secreted compounds, sparking a shift towards postbiotics research.
Evolving from probiotics, postbiotics encompass a broader spectrum of inanimate microorganisms or their components that offer health benefits. The International Scientific Association of Probiotics and Prebiotics (ISAPP) defines postbiotics as preparations containing inactive cellular biomass and various metabolites produced during growth and fermentation, such as short-chain fatty acids and bacteriocins. While current postbiotic research predominantly revolves around food-safe microbes like lactic acid bacteria, the unique advantage of postbiotics lies in their potential to utilize a wider range of microbes, including non-traditionally safe taxa like Faecalibacterium prausnitzii. Such microbes, known for producing beneficial compounds like butyrate and microbial anti-inflammatory molecules, could offer health-promoting effects through postbiotic therapies.
Postbiotics exhibit diverse health modulatory effects, particularly in strengthening the gut barrier, reducing inflammation, and combating gut pathogens. Short-chain fatty acids (SCFAs) like butyrate, propionate, and acetate, produced by gut microbiota, play crucial roles in gut health by enhancing epithelial barrier integrity, immune regulation, and anti-inflammatory responses. Notably, butyrate production by specific bacteria like Faecalibacterium prausnitzii has been linked to anti-inflammatory and anti-carcinogenic effects, highlighting the potential of butyrate-rich postbiotic preparations in promoting gut health. Similarly, propionate and acetate contribute to metabolic and anti-carcinogenic effects, showcasing the broad spectrum of SCFAs’ impact on human health.
Moreover, postbiotics containing exopolysaccharides (EPS) from lactic acid bacteria demonstrate the potential to strengthen the intestinal epithelial barrier by upregulating key proteins like ZO-1 and occludin, essential for maintaining gut barrier integrity. EPS not only enhance barrier function but also exhibit antioxidant properties, scavenging reactive oxygen species (ROS) and reducing oxidative stress associated with various gut diseases. Additionally, postbiotics rich in bacteriocins, antimicrobial peptides produced by bacteria, offer a promising avenue to combat gut pathogens without inducing antibiotic resistance, presenting a targeted and effective approach in addressing microbial imbalances.
Beyond gut health, postbiotics hold promise in modulating human health in extraintestinal sites like the skin, vagina, and oral cavity. Research indicates that postbiotics, particularly those derived from lactic acid bacteria, can positively impact skin disorders, wound healing, and oral health by influencing microbiome compositions and promoting beneficial microbial interactions. With postbiotics showcasing diverse health benefits across different body sites, further exploration into their applications and mechanisms of action is crucial for harnessing their full therapeutic potential and advancing personalized health interventions.
In conclusion, postbiotics represent a paradigm shift in biotic therapies, offering a versatile and effective approach to modulate human health through inanimate microorganisms and their bioactive components. From enhancing gut barrier function to combating pathogens and promoting wound healing, the multifaceted effects of postbiotics extend beyond gut health, promising novel therapeutic avenues for a range of health conditions. As research continues to unravel the intricate interplay between postbiotics and human health, unlocking their full therapeutic potential holds the key to revolutionizing personalized healthcare interventions and addressing a myriad of health challenges across diverse body systems.
- Postbiotics offer novel avenues for health modulation through inanimate microbial components
- Short-chain fatty acids and bacteriocins in postbiotics show promise in enhancing gut health and combating pathogens
- Postbiotics hold potential in strengthening the gut barrier, reducing inflammation, and promoting wound healing
- Diverse health benefits of postbiotics extend to extraintestinal sites like the skin, vagina, and oral cavity
- Further research into postbiotics is essential to unlock their full therapeutic potential and advance personalized health interventions
Tags: probiotics, yeast, secretion, microbiome, regulatory, filtration
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