NCT07567651Completed
Citicoline and Filtration Surgery
A Single-centre, Randomised, Double-blind Study to Assess the Efficacy of Citicoline Compared With Placebo on Visual Function in Glaucoma Patients Undergoing Subconjunctival Filtering Surgery for Glaucoma
Source: ClinicalTrials.gov · Last updated 5 May 2026
Brief summary (registry, in English)
Glaucoma is a group of conditions characterised by a progressive loss of retinal ganglion cells (RGCs) and their axons, leading to characteristic changes in the optic nerve head and the retinal nerve fibre layer. If left untreated, the disease has a natural course that can lead to progressive and significant impairment of visual function. Intraocular pressure (IOP) is the main modifiable risk factor for the onset and progression of the disease. The positive effect of surgery on the progression of glaucoma is certainly due to the reduction in IOP levels achieved in the post-operative period, with probable secondary effects on ocular haemodynamics as well. Although IOP reduction is now considered the most potent neuroprotective treatment for glaucoma, it has been shown that good tonometric control may, in some cases, not be sufficient to preserve visual function. There are, in fact, pressure-independent mechanisms involved in the pathogenesis of glaucomatous damage, in which the progressive deterioration and apoptosis of RGCs are linked to mechanisms such as oxidative stress, glutamate neurotoxicity, the inhibition of anterograde transport of neurotrophic factors, and mitochondrial dysfunction. In recent years, various molecules, including cytidine-5'-diphosphocholine (citicoline), have been proposed in combination with hypotensive therapy due to their neuroprotective and neuroenhancing effects. In addition to its structural action, it possesses a functional action (neuroenhancer) as it increases the synthesis of neurotransmitters such as noradrenaline, acetylcholine, serotonin and dopamine, which are involved in visual signal transmission at both the retinal and post-retinal levels. To date, there is no scientific evidence regarding the effect of citicoline on visual function in glaucoma patients who have undergone filtration surgery. Therefore, the hypothesis of this study is that if surgery increases the likelihood of an improvement in the function of residual RGCs, citicoline could help achieve this objective either by increasing the proportion of patients showing improvement or by increasing the extent of the improvement. The use of a placebo is ethically justified because all patients involved in the study, having signed an informed consent form, will undergo surgical treatment - which is considered the treatment of choice for progressive glaucoma - and the efficacy of citicoline treatment needs to be validated in terms of its ability to alter the course of the disease.
- Status (registry)
- Completed
- Study type
- Interventional
- Enrollment
- 6 (actual)
- First submitted
- 23 Apr 2026
- Start date
- 10 Aug 2021
- Primary completion date
- 31 Dec 2025
- Lead sponsor
- Fondazione IRCCS Policlinico San Matteo di Pavia
- Diseases
- Glaucoma
- NCT number
- NCT07567651
What you commit to
- Study type: Interventional
- Participants enrolled: 6
- From 10 Aug 2021 to the primary completion date, 31 Dec 2025
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Previous glaucoma surgery (trabeculectomy, valve implantation or placement of other devices, cyclophotocoagulation)
- Previous vitreoretinal or corneal eye surgery
- Systemic administration (oral or parenteral) of cerebral vasoactive drugs, neurotrophic agents, lutein, zeaxanthin, docosahexaenoic acid, ubiquinone and/or its derivatives, citicoline and/or its derivatives within 6 months prior to enrolment in the study
- Topical therapy with citicoline and/or its derivatives within 6 months prior to enrolment in the study
Other illness
- Visual, neurological or general medical conditions that may affect the visual field, electrophysiological tests, OCT or A-OCT scans
- Known or suspected allergy or sensitisation to the study product
Other
- Diagnosis of angle-closure glaucoma
- Pregnancy or breastfeeding
Who the study is looking for
- age \> 18 years
- Ability to understand the protocol and provide informed consent to participate in the study
- Diagnosis of primary or secondary open-angle glaucoma (PEX - PIG) and the need to undergo subconjunctival filtration surgery due to signs of morphological/functional progression of the condition or failure to achieve target pressure with medical or pre-surgical therapy.
- The diagnosis of glaucoma is defined by the presence of typical ophthalmoscopic damage to the optic nerve head and the consequent visual field defect. In particular, a glaucomatous visual field defect will be considered as such if there is a cluster of 3 or more contiguous points in the pattern deviation plot with a probability of occurrence in the normal population of less than 5%, one of which has a probability of less than 1%, a pattern standard deviation with a probability of less than 5%, or a GHT result outside the normal limits.
- Early to moderate visual field defect, according to the Hodapp-Parrish-Anderson classification, i.e. with MD up to -12 dB, as determined by the Humphrey 24-2 SITA Standard computerised test.
- Rate of visual field defect progression \> 0.5 dB/year, in the 2 years prior to surgery.
- At least 3 visual field examinations performed using standard perimetry in the 2 years prior to surgery.
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Fondazione IRCCS Policlinico San Matteo di Pavia Coordinator of this site? Confirm its status | Pavia | Italy | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.