Breaking News
December 16, 2018 - Menlo Therapeutics’ Successful Phase 2 Clinical Trial of Serlopitant Demonstrates Reduction of Pruritus Associated with Psoriasis
December 16, 2018 - Siblings of children with autism or ADHD are at elevated risk for both disorders
December 16, 2018 - New project aims to understand why and how metabolic disorders develop in patients
December 16, 2018 - Diets containing GM maize have no harmful effects on health or metabolism of rats
December 16, 2018 - Are doctors and teachers confusing immaturity and attention deficit?
December 16, 2018 - Hearing loss linked with increased risk for premature death
December 16, 2018 - Chromatrap buffer reagents for lysing cells offer many benefits
December 16, 2018 - Young Breast Cancer Patients Face Higher Risk for Osteoporosis
December 16, 2018 - 3-D printing offers helping hand to people with arthritis
December 16, 2018 - Community Health Choice helps manage complex and chronic care conditions
December 16, 2018 - Regular trips out could dramatically reduce depression in older age
December 16, 2018 - CWRU to use VivaLNK’s Vital Scout device for stress study in student athletes
December 16, 2018 - ‘Easy Way Out’? Stigma May Keep Many From Weight Loss Surgery
December 16, 2018 - Gout drug may protect against chronic kidney disease
December 16, 2018 - Talking about memories enhances the wellbeing of older and younger people
December 16, 2018 - Occupational exposure to pesticides increases risk for cardiovascular disease among Latinos
December 16, 2018 - A biomarker in the brain’s circulation system may be Alzheimer’s earliest warning
December 16, 2018 - Magnesium may play important role in optimizing vitamin D levels, study shows
December 16, 2018 - The effect of probiotics on intestinal flora of premature babies
December 16, 2018 - Parents spend more time talking with kids about mechanics of using mobile devices
December 16, 2018 - Biohaven Announces Positive Results from Ongoing Rimegepant Long-Term Safety Study
December 16, 2018 - Arterial stiffness may predict dementia risk
December 16, 2018 - Study explores link between work stress and increased cancer risk
December 16, 2018 - Sex work criminalization linked to incidences of violence finds study
December 16, 2018 - Johns Hopkins researchers discover swarming behavior in fish-dwelling parasite
December 16, 2018 - Schistosomiasis prevention and treatment could help control HIV
December 16, 2018 - Early postpartum opioids linked with persistent usage
December 16, 2018 - Johns Hopkins researchers identify molecular causes of necrotizing enterocolitis in preemies
December 16, 2018 - Advanced illumination expands capabilities of light-sheet microscopy
December 16, 2018 - Alzheimer’s could possibly be spread via contaminated neurosurgery
December 16, 2018 - Unraveling the complexity of cancer biology can prompt new avenues for drug development
December 16, 2018 - Inflammatory Bowel Disease, Prostate Cancer Linked
December 16, 2018 - Cannabis youth prevention strategy should target mental wellbeing
December 15, 2018 - Recent developments and challenges in hMAT inhibitors
December 15, 2018 - Sewage bacteria found lurking in Hudson River sediments
December 15, 2018 - CDC selects UMass Amherst biostatistician model that helps predict influenza outbreaks
December 15, 2018 - Researchers reveal brain mechanism that drives itch-evoked scratching behavior
December 15, 2018 - New computer model helps predict course of the disease in prostate cancer patients
December 15, 2018 - Obesity to Blame for Almost 1 in 25 Cancers Worldwide
December 15, 2018 - How the brain tells you to scratch that itch
December 15, 2018 - New findings could help develop new immunotherapies against cancer
December 15, 2018 - World’s largest AI-powered medical research network launched by OWKIN
December 15, 2018 - Young people suffering chronic pain battle isolation and stigma as they struggle to forge their identities
December 15, 2018 - Lifespan extension at low temperatures depends on individual’s genes, study shows
December 15, 2018 - New ingestible capsule can be controlled using Bluetooth wireless technology
December 15, 2018 - Researchers uncover microRNAs involved in the control of social behavior
December 15, 2018 - Research offers hope for patients with serious bone marrow cancer
December 15, 2018 - Link between poverty and obesity is only about 30 years old, study shows
December 15, 2018 - Mass spectrometry throws light on old case of intentional heavy metal poisoning
December 15, 2018 - BeyondSpring Announces Phase 3 Study 105 of its Lead Asset Plinabulin for Chemotherapy-Induced Neutropenia Meets Primary Endpoint at Interim Analysis
December 15, 2018 - Study finds that in treating obesity, one size does not fit all
December 15, 2018 - Tenacity and flexibility help maintain psychological well-being, mobility in older people
December 15, 2018 - Study reveals role of brain mechanism in memory recall
December 15, 2018 - High levels of oxygen encourage the brain to remain in deep, restorative sleep
December 15, 2018 - Experimental HIV vaccine strategy works in non-human primates, research shows
December 15, 2018 - Genetically modified pigs could limit replication of classical swine fever virus, study shows
December 15, 2018 - FDA Approves Herzuma (trastuzumab-pkrb), a Biosimilar to Herceptin
December 15, 2018 - Cost and weight-loss potential matter most to bariatric surgery patients
December 15, 2018 - Cancer Research UK and AstraZeneca open new Functional Genomics Centre
December 15, 2018 - New research lays out potential path for treatment of Huntington’s disease
December 15, 2018 - Prestigious R&D 100 Award presented to Leica Microsystems
December 15, 2018 - Study shows septin proteins detect and kill gut pathogen, Shigella
December 15, 2018 - Study sheds new light on disease-spreading mosquitoes
December 15, 2018 - 2017 Saw Slowing in National Health Care Spending
December 15, 2018 - Monitoring movement reflects efficacy of mandibular splint
December 15, 2018 - Study supports BMI as useful tool for assessing obesity and health
December 15, 2018 - Self-guided, internet-based therapy platforms effectively reduce depression
December 15, 2018 - Organically farmed food has bigger climate impact than conventional food production
December 15, 2018 - Faster, cheaper test has potential to enhance prostate cancer evaluation
December 15, 2018 - Researchers study abnormal blood glucose levels of patients after hospital discharge
December 15, 2018 - Swedish scientists explore direct association of dementia and ischemic stroke deaths
December 15, 2018 - Study finds 117% increase in number of dementia sufferers in 26 years
December 15, 2018 - Eczema Can Drive People to Thoughts of Suicide: Study
December 15, 2018 - Link between neonatal vitamin D deficiency and schizophrenia confirmed
December 15, 2018 - Nurse denied life insurance because she carries naloxone
December 15, 2018 - Ritalin drug affects organization of pathways that build brain networks used in attention, learning
December 15, 2018 - Research pinpoints two proteins involved in creation of stem cells
December 15, 2018 - Gut bacteria may modify effectiveness of anti-diabetes drugs
December 15, 2018 - A new type of ‘painless’ adhesive for biomedical applications
December 15, 2018 - Early physical therapy associated with reduction in opioid use
New ocular inserts allow patient’s cornea to absorb more antibiotics

New ocular inserts allow patient’s cornea to absorb more antibiotics

image_pdfDownload PDFimage_print

Researchers from Valencia’s UCH CEU University have developed ocular inserts which allow a patient’s cornea to absorb more antibiotics than current methods

The anatomic and physiologic structure of the eyes constitutes by itself an important barrier when administering medicine. The amount of medicine that passes through the cornea by applying creams or drops is very limited and it is necessary to develop alternative, more effective ways of administering them ocularly. Researchers at the Pharmacy Department of the CEU Cardenal Herrera University have published the design of a new bioadhesive ocular insert which is placed inside the eyelid and releases a larger amount of medicine through the cornea in a controlled way in the international journal Drug Delivery and Translational Research.

Specifically, researchers at the CEU UCH have developed this new insert for the ocular administration of the antibiotic moxifloxacin, which is applied in cases of bacterial infections of the eyes such as corneal queratitis or bacterial endophthalmitis. The Investigation Group for the Development of New Pharmaceutical Formulas at the CEU UCH, headed by the dean of the Health Sciences Faculty, Alicia López Castellano, undertook the research, a result of the doctoral thesis of María Sebastián Morelló, as well as teachers and researchers María Aracely Calatayud, Vicente Rodilla and Cristina Balaguer, who are coauthors.

Soluble insert instead of an injection

As the authors of the study explain, “when we apply cream or drops in the eyes, eyeball defense mechanisms such as tears are triggered, which dilutes the applied medicine. Sometimes, less than 5% of the medicine administered in this way manages to penetrate the eye in an effective way. Therefore, pharmaceutical research aims to develop ocular inserts, very thin cylinders or discs made of bioadhesive polymeric materials, which adapt to the shape of the eye and release the medicine through the cornea in a controlled manner.”

Research performed at the CEU UCH has developed and analyzed the efficiency of different types of inserts, using bioadhesive polymers with different physicochemical characteristics to compare them to discover which one could obtain the optimal degree of permeability to administer moxifloxacin. The research has made it possible to develop a very thin, practically transparent insert which is easily adhered to the ocular mucosa, providing larger concentrations of moxifloxacin through the cornea than other administration formats currently commercialized, such as orally.

According to the CEU UCH research team, “the ocular release of moxifloxacin with this insert would make for an improved treatment of some ocular illnesses such as bacterial endophthalmitis, an infection of the eyeball which can appear after suffering a wound or as a complication following intraocular surgery. It can also be used for treating corneal queratitis, an infection of the cornea which causes inflammation and can leave a leucoma or scar as a result. In both types of infection, vision can become severely compromised without the appropriate treatment.”

Permeability of the corneal tissue

In order to establish the physicochemical properties of the most efficient bioadhesive polymers to be used as ocular inserts in order to administer said antibiotic, during research, the CEU UCH team has performed moxifloxacin diffusion ex vivo experiments through rabbit corneas preserved at different temperatures. The histological differences of these corneas have been studied to determine whether the use of those which have been frozen to study the absorption through this type of tissue can be used. According to the researchers, “the ocular diffusion studies we have undertaken reveal significant differences of diffusion through fresh and frozen corneas, which are very useful for the development of future research to test new ocular inserts.”

The development of this ocular insert to administer moxifloxacin opens new treatment possibilities for ocular infections. A research line which the CEU UCH research team will continue to develop in future projects with other types of medicines.

Source:

Administering antibiotics through the cornea

Tagged with:

About author

Related Articles