Quaternized chitosan-coated PLGA nanoparticles co-deliver resveratrol and all-trans retinoic acid to enhance humoral immunity, cellular immunity and gastrointestinal mucosal immunity.

Conventional vaccine adjuvants are limited by their mechanisms of action and administration routes, often failing to simultaneously elicit robust systemic and mucosal immune responses. This limitation compromises the establishment of dual protective barriers during early pathogen invasion. Therefore, we developed an innovative poly (lactic-co-glycolic acid) (PLGA) nanoparticle-based adjuvant system (Res/RA QCS NPs) featuring quaternized chitosan (QCS) surface modification for ovalbumin (OVA) delivery, co-encapsulating dual immunomodulators - resveratrol (Res) and all-trans retinoic acid (RA).

Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBiTe.

The intrinsic magnetic topological insulator MnBiTe has attracted significant interest recently as a promising platform for exploring exotic quantum phenomena. Here we report that, when atomically thin MnBiTe is deposited on a substrate such as silicon oxide or gold, there is a very strong mechanical coupling between the atomic layer and the supporting substrate. This is manifested as an intense low-frequency breathing Raman mode that is present even for monolayer MnBiTe.