4′-Galactosyllactose (4′-GL) in Oligosaccharide Research (CAS 6587-31-1)

4'-Galactosyllactose (4'-GL for short) is a key oligosaccharide component naturally found in human breast milk and is known as the "nutritional code of breast milk wisdom." It is not only an important bioactive factor in early infant growth and development, but also shows extraordinary application potential in the fields of adult nutrition, intestinal microecological regulation and general health.

Chemical Information

Chemical name: O-β-D-galactopyranosyl-(1→4)-O-β-D-galactopyranosyl-(1→4)-D-glucopyranosyl

Common name: 4’-galactosyllactose, 4’-GL

Chemical formula: C₁₈H₃₂O₁₆

Molecular weight: 504.44 g/mol

CAS number: 6587-31-1

Structural features

4’-galactosyl lactose is an important member of the neutral fucosylated lactose series in the human milk oligosaccharide (HMOs) family. Its structure is unique and specific:

Precise trisaccharide structure: formed by a galactose unit connected to the galactosyl end of lactose (galactose-glucose disaccharide) through a β(1→4) glycosidic bond. This specific connection method and sequence determines its unique functional properties and cannot be replaced by ordinary sugars.

Non-digestible and intestinal selectivity: Unlike most carbohydrates, the human upper gastrointestinal tract lacks the enzymes to hydrolyze its specific glycosidic bonds. Therefore, 4'-GL can completely reach the large intestine and serve as a highly specific prebiotic, specifically providing nutrients to beneficial bacteria.

Structural simulation of natural ligands: Its sugar chain structure can simulate the glycosylation pattern on the surface of intestinal cells, thereby interfering with the adhesion of pathogens, acting as a "bait" and protecting intestinal health.

Main applications and advantages

1. Core functional ingredients of high-end infant formula milk powder

Simulated breast milk gold standard: Breast milk is the gold standard for infant nutrition, and HMOs are the third largest solid component in breast milk after fat and lactose. Adding high-purity 4’-galactosyl lactose to infant formula is a key step to make it functionally closer to breast milk, achieving a leap from “nutritional imitation” to “functional imitation”.

Promote the colonization of healthy intestinal flora: 4'-GL can significantly promote the proliferation of beneficial bacteria such as Bifidobacteria (especially Bifidobacterium infantis) in the infant's intestines, help establish an early intestinal microecology dominated by beneficial bacteria, and lay the foundation for lifelong health.

Enhance intestinal barrier and immunity: By regulating the balance of flora, it indirectly strengthens the intestinal barrier function and gently regulates the development of the immune system, helping to reduce the risk of common infections and allergic diseases in infants and young children.

Support brain development: Studies have shown that HMOs and their metabolites may have a positive impact on infant neurocognitive development, and formulas added with 4'-GL are designed to provide more comprehensive developmental support.

2. Innovative raw materials for adult health and functional foods

As the understanding of the relationship between intestinal flora and systemic health deepens, the application of 4’-galactosyllactose has expanded to full life cycle nutrition.

Precision prebiotic: Compared with ordinary prebiotics (such as inulin, FOS/GOS), 4'-GL is more selective for beneficial bacteria, has more precise effects, may have a lower effective dose, and can reduce discomfort reactions such as bloating, making the experience more comfortable.

Metabolism and weight management: By optimizing the structure of intestinal flora, it helps improve energy metabolism and regulate glucose and lipid metabolism, becoming an emerging ingredient in weight management and metabolic health products.

Immune regulation: The intestine is the largest immune organ in the human body. 4'-GL exerts a systemic immune regulation effect through the "bacteria-gut-immune axis" and is suitable for use in functional foods that improve the body's general resistance.

3. Potential ingredients of special medical foods and clinical nutrition

In the field of clinical nutrition, 4’-galactosyllactose exhibits unique value:

Intestinal function support: Suitable for postoperative, antibiotic treatment or critically ill patients to help quickly rebuild damaged intestinal flora, maintain the integrity of intestinal function, and prevent secondary infections.

Inflammatory bowel disease management: Its anti-pathogen adhesion and immunomodulatory properties provide a new research direction for nutritional auxiliary intervention in intestinal diseases such as inflammatory bowel disease.

4. Tool molecules for cutting-edge biomedical research

Microbial interaction research: As a highly specific substrate, it is used to study the metabolic pathways and regulatory mechanisms of intestinal bacteria (such as Bifidobacterium).

Glycobiological research: As complex sugar chains with well-defined structures, they are ideal tool molecules for studying sugar-protein interactions (such as host-pathogen recognition) and glycobiological functions.

Conclusion

4’-Galactosyllactose is not only a sugar, it represents a new paradigm of precision nutrition targeting intestinal microecology. From empowering the next generation of infant formula, to driving innovation in adult functional foods, to pioneering new paths in clinical nutrition, its value is being continuously explored and verified.

The above information is provided by the editor of KASONS and is for scientific research only.