Bioassays performed by the disc diffusion technique on samples of blood, tears, aqueous humour and cornea from 30 rabbits killed 4 to 24 hours following a single intravenous injection of benzylpenicillin (40 mg/kg) showed that the penicillin content of these fluids and tissues progressively decreased with time. However, even after 24 hours the agent could be detected in the samples. The peripheral and central cornea contained similar amounts of penicillin up to 16 hours; thereafter, the peripheral cornea contained more of the agent.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
N-acetylcysteine and chitosan conjugate modified dexamethasone nanostructured lipid carriers: Enhanced permeability, precorneal retention and lower inflammation for the treatment of dry eye syndrome.
Int J Biol Macromol
January 2025
School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
Dexamethasone (Dex) is a primary medication for treating dry eye syndrome, and tobramycin-dexamethasone eye drops are commercially available. However, the eye's complex physiological environment reduces its bioavailability, and repeated use can lead to significant systemic toxicity and side effects. This study introduces a novel conjugate of chitosan (CS) and N-acetylcysteine (NAC), a bioadhesive material, which was grafted onto the surface of a Dex-supported nanostructured lipid carrier (NLC) to develop an innovative nanoparticle lipid ocular drug delivery system (CS-NAC@Dex-NLC).
View Article and Find Full Text PDFEnhanced Ocular Bioavailability and Prolonged Duration via Hydrophilic Surface Nanocomposite Vesicles for Topical Drug Administration.
Pharmaceutics
November 2024
Guangdong Provincial Key Laboratory of Advanced Drug Delivery, Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, No. 280 University Town Outer Ring East Road, Guangzhou 510006, China.
Background: Internal ocular diseases, such as macular edema, uveitis, and diabetic macular edema require precise delivery of therapeutic agents to specific regions within the eye. However, the eye's complex anatomical structure and physiological barriers present significant challenges to drug penetration and distribution. Traditional eye drops suffer from low bioavailability primarily due to rapid clearance mechanisms.
View Article and Find Full Text PDFClinical practice patterns in the management of dry eye disease: A TFOS international survey 2023-4.
Ocul Surf
December 2024
Centre for Ocular Research and Education (CORE), School of Optometry and Vision Science, University of Waterloo, Canada; Optometry and Vision Science Research Group, College of Health and Life Sciences, Aston University, Birmingham, United Kingdom; Department of Ophthalmology, Aotearoa New Zealand National Eye Centre, The University of Auckland, New Zealand.
Aims: To understand current clinical management of dry eye disease (DED), based on its perceived severity and subtype by practitioners across the world.
Methods: The content of the anonymous survey was chosen to reflect the DED management strategies reported by the Tear Film and Ocular Surface Society (TFOS) 2 Dry Eye Workshop (DEWS II). Questions were designed to ascertain practitioner treatment choice, depending on the subtype and severity of DED.
Blood component therapy for dry eye disease: a systematic review and network meta-analysis.
Front Med (Lausanne)
December 2024
Department of Ophthalmology, Zhangye People's Hospital Affiliated to Hexi University, Zhangye, China.
Objective: Blood component therapy has shown promising potential as an emerging treatment for dry eye disease; however, it remains unclear which specific blood component is the most effective. This study aims to compare the efficacy of different blood components in the treatment of dry eye disease through a network meta-analysis, with the goal of providing the latest and most reliable evidence for clinical practice.
Methods: We conducted a systematic search of the PubMed, Web of Science, Cochrane, Embase, and Scopus databases, with the search concluding on June 1, 2024.
Refrigeration reduces instillation discomfort of a 0.09% cyclosporine A solution.
Optom Vis Sci
January 2025
School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada.
Significance: Topical cyclosporine A (CsA) for the treatment of dry eye disease is often associated with instillation discomfort, which may negatively influence patient adherence to therapy. This study found that refrigerating topical CsA reduced instillation discomfort compared with instillation of warm CsA. Thus, refrigerating CsA prior to instillation may improve patient experience when using CsA to manage dry eye disease.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!