Mini Reviews in Medicinal Chemistry - Volume 25, Issue 7, 2025

Luminescent Lanthanide (III) (Ln (III)) bioprobes (LLBs) have been extensively used in the last two decades as intracellular molecular probes in bio-imaging for the efficient revelation of analytes, to signal intracellular events (enzymes/protein activity, antigen-antibody interaction), target specific organelles, and determine parameters of particular biophysical interest, to gain important insights on pathologies or diseases. The choice of using a luminescent Ln (III) coordination compound with respect to a common organic fluorophore is intimately connected to how their photophysical sensitization (antenna effect) can be finely tuned and especially triggered to respond (even quantitatively) to a certain biophysical event, condition or analyte. While there are other reviews focused on how to design chromophoric ligands for an efficient sensitization of Ln (III) ions, both in the visible and NIR region, this mini-review is application-driven: it is a small collection of particularly interesting examples where the LLB’s emissive information is acquired by imaging the emission intensity and/or the fluorescence lifetime (fluorescence lifetime imaging microscopy, FLIM).

Topical application of ophthalmic drugs remains to be the preferred delivery method. Eye drops lead the pharmaceutical forms due to ease of application. Despite the poor bioavailability of drugs administered topically, especially related to the dilution and excretion by tear fluid, the absence of controlled drug delivery, and the poor compliance within pediatric and senior populations, eye drops and ointments are still the first choices in eye-related disorders management. Only a few studies have explored the eyelid skin as a site for drug application and transdermal delivery as an alternative route of administration of ophthalmic drugs. Such works have validated the delivery of drugs into the ocular tissues through the eyelid barrier. The eyelid represents a differentiated skin barrier concerning the thickness, the structure of the stratum corneum, the vasculature, and the amount of lipids. This work intends to question why the eyelid, being an accessible, non-invasive, comfortable route of administration is not considered a feasible route for ophthalmic drugs. The eyelid structure is presented, and the anatomical and physiological distinctive characteristics are presented. The work also presents the research work on topical drug application to the eyelid skin that has been published so far.

In recent years, there has been a growing emphasis on the “back-to-nature” movement, which has brought biopolymers derived from natural sources into the spotlight. These biopolymers are gaining attention for their versatile surface-active properties, anti-adhesive capabilities, excellent biocompatibility, non-toxicity, biodegradability, and antimicrobial effectiveness against a wide range of oral microorganisms, including both bacteria and fungi. Researchers have been actively modifying these eco-friendly, nature-based biopolymers to enhance their interaction with surrounding cells and tissues, improving their performance in vivo. This has led to innovative applications in areas such as surface coatings, controlled drug delivery, tissue repair, and dental implant devices. These advancements hold the potential to pave the way for the development of novel drug delivery systems with enhanced therapeutic properties, ultimately supporting the creation of innovative formulations for clinical use. This review aims to provide an up-to-date overview of recent developments, explore potential future directions, and highlight the promising applications of nature-derived biopolymers in oral healthcare.

Pyrazolic chalcone exhibits diverse therapeutic activities, including anti-inflammatory, antioxidant, antimicrobial, antitumor, and anti-diabetic properties. Structural activity relationship (SAR) studies play a crucial role in understanding the molecular aspects governing their biological effects, guiding the rational design of derivatives with enhanced efficacy and reduced side effects. This review provides an overview of pyrazolic chalcone derivatives, emphasizing their synthesis through both conventional and green methods. In comparison, conventional synthesis methods have been widely employed in the past for the production of pyrazolic chalcones, often relying on traditional chemical processes that may involve the use of hazardous reagents and generate significant waste. On the other hand, green synthesis methods, in harmony with the growing emphasis on sustainable practices in drug discovery, offer a more environmentally friendly alternative. Green synthesis typically involves the use of eco-friendly reagents, solvents, and energy-efficient processes, resulting in reduced environmental impact and improved resource efficiency. Overall, pyrazolic chalcone derivatives represent a promising class of compounds with significant potential for therapeutic applications.