Alginate oligosaccharides (AOS) are a type of functional oligosaccharide derived from the degradation of sodium alginate, which is primarily extracted from marine brown algae. These oligosaccharides are composed of β-D-mannuronic acid (M) and α-L-guluronic acid (G), linked by 1,4-glycosidic bonds. Due to their low molecular weight and high solubility, AOS have gained significant attention in various fields, including pharmaceuticals, functional foods, and green agriculture .CAS NO.:CAS 9005-38-3
Biological Activities and Applications
- Antibacterial and Anti-inflammatory Properties
AOS exhibit strong antibacterial activity, particularly against pathogenic bacteria such as Candida and Aspergillus species. They can disrupt fungal biofilm formation and potentiate the efficacy of antifungal agents like fluconazole and nystatin . Additionally, AOS can significantly shorten the adaptation period of bifidobacteria and promote their proliferation, making them a promising candidate for functional health foods . - Anti-inflammatory and Immune Regulation
AOS have been shown to reduce inflammation by modulating gut microbiota and enhancing intestinal barrier function. For example, in a mouse model of gouty arthritis, AOS alleviated joint pain and inflammation by improving gut microbiota composition and reducing the production of pro-inflammatory cytokines . Similarly, AOS can suppress oxidative stress and endoplasmic reticulum (ER)-mediated apoptosis, which are key factors in myocardial ischemia/reperfusion injury . - Prebiotic and Digestive Health Benefits
As a prebiotic, AOS promotes the growth of beneficial bacteria such as bifidobacteria and lactobacilli, while inhibiting the growth of harmful bacteria. This makes AOS a valuable ingredient in dietary supplements and functional foods aimed at improving gut health and preventing constipation . - Anticancer and Neuroprotective Effects
AOS has demonstrated potential in cancer treatment by enhancing the immune system and inhibiting tumor growth. It also exhibits neuroprotective effects by reducing oxidative stress and protecting neurons from damage caused by toxins or diseases . - Applications in Agriculture and Aquaculture
In agriculture, AOS can stimulate plant growth, enhance drought resistance, and induce disease resistance in crops. In aquaculture, AOS serves as a safe and effective feed additive, replacing antibiotics and promoting the growth of fish and other aquatic species .
Production and Specifications
AOS can be produced through various methods, including enzymatic hydrolysis, acid hydrolysis, and oxidative degradation. These methods allow for the controlled degradation of alginate into oligosaccharides with specific molecular weights and structural properties. The resulting AOS typically appears as a light yellow powder with a degree of polymerization below 20 . The product specifications include:
- Appearance: Light yellow powder
- Viscosity in 1% solution: <10 cps
- Mesh size: 200 mesh
- Loss on drying: ≤15%
- Water-insoluble matter: ≤0.6%
Market and Regulatory Compliance
AOS is widely used in markets such as Asia, Australia, and North America. It is compliant with Halal and Kosher certifications, ensuring its suitability for a broad range of consumers . The product is supplied from China and is stored at room temperature for optimal stability .
Conclusion
Alginate oligosaccharides are a versatile and biologically active compound with a wide range of applications in pharmaceuticals, functional foods, and agriculture. Their unique properties, including antibacterial, anti-inflammatory, and prebiotic effects, make them a promising candidate for the development of new health products and sustainable agricultural practices. As research continues to uncover the full potential of AOS, it is expected to play an increasingly important role in improving human health and environmental sustainability
