Polysaccharides
Group B Streptococcus Vaccine
Toward the Development of a Universal Vaccine Against Group B Streptococcus
from Roberta Cozzi, John L. Telford and Domenico Maione writing in Vaccine Design: Innovative Approaches and Novel Strategies
Group B Streptococcus (GBS) is one of the most common cause of life-threatening bacterial infections in infants and is also an emerging pathogen among adult humans, especially in the elderly, immunocompromised and diabetic adults. Capsular polysaccharide based vaccines of the most common serotypes present in the United States and Europe are in an advanced stage of development but they are not effective against serotypes present in other parts of the world. Many protein antigens have been studied for the discovery of an effective universal vaccine that could overcome serotype specificity. Thanks to reverse vaccinology and new technologies, a vaccine combination based on the pilus proteins has been discovered for the development of a universal GBS vaccine that is potentially capable of preventing all GBS infections.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies | Pili and Flagella: Current Research and Future Trends
from Roberta Cozzi, John L. Telford and Domenico Maione writing in Vaccine Design: Innovative Approaches and Novel Strategies
Group B Streptococcus (GBS) is one of the most common cause of life-threatening bacterial infections in infants and is also an emerging pathogen among adult humans, especially in the elderly, immunocompromised and diabetic adults. Capsular polysaccharide based vaccines of the most common serotypes present in the United States and Europe are in an advanced stage of development but they are not effective against serotypes present in other parts of the world. Many protein antigens have been studied for the discovery of an effective universal vaccine that could overcome serotype specificity. Thanks to reverse vaccinology and new technologies, a vaccine combination based on the pilus proteins has been discovered for the development of a universal GBS vaccine that is potentially capable of preventing all GBS infections.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies | Pili and Flagella: Current Research and Future Trends
Pseudomonas Vaccines
Category: Vaccines | Immunology
Vaccines to Combat Pseudomonas aeruginosa Infections in Immunocompromised Patients
from Jennifer M. Scarff and Joanna B. Goldberg writing in Vaccine Design: Innovative Approaches and Novel Strategies
Pseudomonas aeruginosa is an important opportunistic pathogen that causes an array of nosocomial infections, such as ventilator-associated pneumonia and infections in cancer patients. P. aeruginosa infections are difficult to treat with antibiotics, making the need for other therapeutic options, such as vaccination, critical. The main target antigen for vaccines has been the lipopolysaccharide (LPS) of P. aeruginosa and studies show that vaccination may be partially protective, but that a combination of vaccination with either antibiotic treatment or cell transfusion protocols typically works best. The efficacy of vaccination, particularly against LPS, has been investigated in human cancer patients. These patients were capable of mounting an immune response, but it was often short-lived or accompanied by severe side effects. An anti-Pseudomonas vaccine could be beneficial to aid in treatment of nosocomial infections caused by this bacterium, but would need optimization for better efficacy.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies | Pseudomonas: Genomics and Molecular Biology
from Jennifer M. Scarff and Joanna B. Goldberg writing in Vaccine Design: Innovative Approaches and Novel Strategies
Pseudomonas aeruginosa is an important opportunistic pathogen that causes an array of nosocomial infections, such as ventilator-associated pneumonia and infections in cancer patients. P. aeruginosa infections are difficult to treat with antibiotics, making the need for other therapeutic options, such as vaccination, critical. The main target antigen for vaccines has been the lipopolysaccharide (LPS) of P. aeruginosa and studies show that vaccination may be partially protective, but that a combination of vaccination with either antibiotic treatment or cell transfusion protocols typically works best. The efficacy of vaccination, particularly against LPS, has been investigated in human cancer patients. These patients were capable of mounting an immune response, but it was often short-lived or accompanied by severe side effects. An anti-Pseudomonas vaccine could be beneficial to aid in treatment of nosocomial infections caused by this bacterium, but would need optimization for better efficacy.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies | Pseudomonas: Genomics and Molecular Biology
Glycoconjugate Vaccines
New Frontiers in the Chemistry of Glycoconjugate Vaccines
from David R. Bundle writing in Vaccine Design: Innovative Approaches and Novel Strategies
Methods for single point attachment of polysaccharides and oligosaccharides to protein carriers and T-cell peptides are important in vaccine design. Contemporary approaches involve synthetic oligosaccharides with linker or tether chemistry designed for compatibility with synthetic strategies. Current research involves the synthesis and evaluation of conjugate vaccines designed to combat infectious bacterial and fungal diseases, as well as the design and testing of therapeutic cancer vaccine. The prevailing dogma that protective B-cell epitopes should be comprised of 10-20 monosaccharides is confirmed for several experimental vaccines including those directed toward Shigell flexneri and Shigella dysenteriae. However, several small epitopes composed of 3-5 monosaccharide residues are sufficient to induce antibody against the whole organism and to confer protection.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies
from David R. Bundle writing in Vaccine Design: Innovative Approaches and Novel Strategies
Methods for single point attachment of polysaccharides and oligosaccharides to protein carriers and T-cell peptides are important in vaccine design. Contemporary approaches involve synthetic oligosaccharides with linker or tether chemistry designed for compatibility with synthetic strategies. Current research involves the synthesis and evaluation of conjugate vaccines designed to combat infectious bacterial and fungal diseases, as well as the design and testing of therapeutic cancer vaccine. The prevailing dogma that protective B-cell epitopes should be comprised of 10-20 monosaccharides is confirmed for several experimental vaccines including those directed toward Shigell flexneri and Shigella dysenteriae. However, several small epitopes composed of 3-5 monosaccharide residues are sufficient to induce antibody against the whole organism and to confer protection.
Further reading: Vaccine Design: Innovative Approaches and Novel Strategies
Metabolism of bifidobacteria
Category: Bacteria
from David A. Sela, Neil P. J Price and David A. Mills in Bifidobacteria: Genomics and Molecular Aspects
The genus Bifidobacterium possesses a unique fructose-6-phosphate phosphoketolase pathway employed to ferment carbohydrates. Much metabolic research on bifidobacteria has focused on oligosaccharide metabolism as these carbohydrate polymers are available in their otherwise nutrient-limited habitats. Interestingly, infant-associated bifidobacterial phylotypes appear to have evolved the ability to ferment milk oligosaccharides, whereas adult-associated species utilize plant oligosaccharides, consistent with what they encounter in their respective environments. As breast-fed infants often harbor bifidobacteria dominated gut consortia, there have been numerous applications to mimic the bifidogenic properties of milk oligosaccharides. These are broadly classified as plant-derived fructo-oligosaccharides or dairy-derived galacto-oligosaccharides, which are differentially metabolized and distinct from milk oligosaccharide catabolism.
Further reading:
The genus Bifidobacterium possesses a unique fructose-6-phosphate phosphoketolase pathway employed to ferment carbohydrates. Much metabolic research on bifidobacteria has focused on oligosaccharide metabolism as these carbohydrate polymers are available in their otherwise nutrient-limited habitats. Interestingly, infant-associated bifidobacterial phylotypes appear to have evolved the ability to ferment milk oligosaccharides, whereas adult-associated species utilize plant oligosaccharides, consistent with what they encounter in their respective environments. As breast-fed infants often harbor bifidobacteria dominated gut consortia, there have been numerous applications to mimic the bifidogenic properties of milk oligosaccharides. These are broadly classified as plant-derived fructo-oligosaccharides or dairy-derived galacto-oligosaccharides, which are differentially metabolized and distinct from milk oligosaccharide catabolism.
Further reading: