Abstract: A molecular structure comprising a hyaluronic acid moiety or a crosslinked form thereof, and a plurality of controllably released bioactive agents attached thereto is provided herein, as well as processes for obtained the same and methods of treating a skin conditions using the same.

Abstract: Provided herein is a drug delivery (DD) system for ratiometric luminescence determination of drug release degree in drug delivery monitoring, which includes a drug, a switchable reporter and non-switchable reporter providing two distinguishable signals for detection; or a single switchable reporter providing two distinguishable signals for detection, and a cleavable linker connecting a drug to a switchable reporter, as well as a method for ratiometric luminescence determination of drug release in a target (in vivo or in vitro), which is effected by administering the DD system provided herein that is capable of releasing a drug from the DD system, measuring two luminescent signals provided by the switchable reporter and the non-switchable reporter, or the single switchable reporter, determining the ratio between these two luminescence signals, and determining the drug release degree through the ratio between the two luminescence signals.

Abstract: A molecular structure comprising a single-stranded hyaluronic acid moiety, and a plurality of releasable cannabidiol moieties attached thereto is provided herein, as well as uses and methods of treating a skin conditions using the same.

Abstract: Provided herein is a class of anti-cancer conjugates designed to cross the blood-brain barrier (BBB) and thereby deliver a methylation agent into cancerous tumor cells, wherein the conjugate comprises a BBB-shuttle moiety that allows the conjugate to cross the BBB, and at least two methylation moieties of the methyltriazene type attached thereto for effecting DNA methylation in the cancerous cells. Also provided are uses of the conjugates in the treatment of brain cancer.