Goondapyrones A-J: Polyketide α and γ Pyrone Anthelmintics from an Australian Soil-Derived sp.

An investigation of ×19 soil samples collected under the auspices of the Australian citizen science initiative, Soils for Science, returned ×559 chemically dereplicated microbial isolates, of which ×54 exhibited noteworthy anthelmintic activity against either the heartworm microfilaria and/or the gastrointestinal parasite L1-L3 larvae. Chemical (GNPS and UPLC-DAD) and cultivation (MATRIX) profiling prompted a detailed chemical investigation of sp. S4S-00196A10, which yielded new anthelmintic polyketide goondapyrones A-J (-), together with the known actinopyrones A () and C ().

Australian Marine and Terrestrial -Derived Surugamides, and Synthetic Analogs, and Their Ability to Inhibit (Heartworm) Motility.

A bioassay-guided chemical investigation of a bacterium, sp. CMB-MRB032, isolated from sheep feces collected near Bathurst, Victoria, Australia, yielded the known polyketide antimycins A4a () and A2a () as potent inhibitors of (heartworm) microfilaria (mf) motility (EC 0.0013-0.

Activity Relationship of Poly(ethylenimine)-Based Liposomes as Group A Vaccine Delivery Systems.

Untreated group A (GAS) can lead to a range of life-threatening diseases, including rheumatic heart disease. To date, no therapeutic or prophylactic vaccines are commercially available to treat or prevent GAS infection. Development of a peptide-based subunit vaccine offers a promising solution, negating the safety issues of live-attenuated or inactive vaccines.

Development of Multilayer Nanoparticles for the Delivery of Peptide-Based Subunit Vaccine against Group A .

Peptide-based subunit vaccines include only minimal antigenic determinants, and, therefore, are less likely to induce allergic immune responses and adverse effects compared to traditional vaccines. However, peptides are weakly immunogenic and susceptible to enzymatic degradation when administered on their own. Hence, we designed polyelectrolyte complex (PEC)-based delivery systems to protect peptide antigens from degradation and improve immunogenicity.

Advances in Infectious Disease Vaccine Adjuvants.

Vaccines are one of the most significant medical interventions in the fight against infectious diseases. Since their discovery by Edward Jenner in 1796, vaccines have reduced the worldwide transmission to eradication levels of infectious diseases, including smallpox, diphtheria, hepatitis, malaria, and influenza. However, the complexity of developing safe and effective vaccines remains a barrier for combating many more infectious diseases.