Journal
GELS
Volume 8, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/gels8020099
Keywords
vaginal drug delivery; sol-gel formulations; stimuli-responsive polymers; mucoadhesion; vaginal applicators/devices
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Approaches for effective and sustained drug delivery to the female reproductive tract remain limited, but the development of versatile delivery platforms like sol-gels shows promise. Sol-gels, which transition from solution to gel triggered by physiological conditions, offer advantages for drug formulations and can be used as drug delivery vehicles for diverse drug molecules. The review discusses the challenges and opportunities in optimal drug delivery and highlights the potential of sol-gels for improved treatment of gynaecological conditions.
Approaches for effective and sustained drug delivery to the female reproductive tract (FRT) for treating a range of gynaecological conditions remain limited. The development of versatile delivery platforms, such as soluble gels (sol-gels) coupled with applicators/devices, holds considerable therapeutic potential for gynaecological conditions. Sol-gel systems, which undergo solution-to-gel transition, triggered by physiological conditions such as changes in temperature, pH, or ion composition, offer advantages of both solution- and gel-based drug formulations. Furthermore, they have potential to be used as a suitable drug delivery vehicle for other novel drug formulations, including micro- and nano-particulate systems, enabling the delivery of drug molecules of diverse physicochemical character. We provide an anatomical and physiological perspective of the significant challenges and opportunities in attaining optimal drug delivery to the upper and lower FRT. Discussion then focuses on attributes of sol-gels that can vastly improve the treatment of gynaecological conditions. The review concludes by showcasing recent advances in vaginal formulation design, and proposes novel formulation strategies enabling the infusion of a wide range of therapeutics into sol-gels, paving the way for patient-friendly treatment regimens for acute and chronic FRT-related conditions such as bacterial/viral infection control (e.g., STDs), contraception, hormone replacement therapy (HRT), infertility, and cancer.
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