Observational studyPloS one2018
Tear biomarkers in latanoprost and bimatoprost treated eyes.
Observational study in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
9 citing papers in PubMed, 17 citations in OpenAlex.
- Prostaglandin analog therapy challenges and innovation in glaucoma therapeutics.Indian journal of ophthalmology · 2026Review
- Candidate SNP Markers Significantly Altering the Affinity of the TATA-Binding Protein for the Promoters of Human Genes Associated with Primary Open-Angle Glaucoma.International journal of molecular sciences · 2024Article
- From Eye Care to Hair Growth: Bimatoprost.Pharmaceuticals (Basel, Switzerland) · 2024Review
- Changes in Tear Proteomic Profile in Ocular Diseases.International journal of environmental research and public health · 2022Review
- Clinical Tear Fluid Proteomics-A Novel Tool in Glaucoma Research.International journal of molecular sciences · 2022Review
- Candidate Glaucoma Biomarkers: From Proteins to Metabolites, and the Pitfalls to Clinical Applications.Biology · 2021Review
- Discovery and clinical translation of novel glaucoma biomarkers.Progress in retinal and eye research · 2021Review
- Effect of Topical Prostaglandin F2α Analogs on Selected Oxidative Stress Parameters in the Tear Film.Medicina (Kaunas, Lithuania) · 2019Article
- Molecular Biomarkers for Glaucoma.Current ophthalmology reports · 2019Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeProstaglandin analogues (PGA's) are the mainstay and first line of treatment in current glaucoma practise. Though latanoprost and bimatoprost are the most commonly used PGA's with minimal side effects at lower concentrations like bimaotoprost 0.01%, direct comparison of their cytokine/MMP profile in tears has not been evaluated earlier. The study intends to ascribe PGA to the upregulation of MMPs, Cytokines and Chemokines mediating varied pathways to result in side effects of the drugs.
methodsTear sample collection was done from outer canthus of 30 eyes of 30 patients (primary open angle glaucoma (n = 26 and n' = 20), normal tension glaucoma (n = 4 and n' = 10), in latanoprost (n) 0.005% and bimatoprost (n') 0.01% group respectively, with a mean age of 62±10.5 years) on >6 months of PGA use using Tear floTM Schirmer filter strip. Tear samples from 30 eyes of 30 cataract patients without drug treatment were used as the control. Gelatinolytic activity of MMP-9 and MMP-2 were examined by substrate gelatine zymography MMP-1 and TIMP-1 concentrations from tears samples with PGAs were evaluated by ELISA while cytokine concentration in the eluted tears was evaluated using a convenient bioplex kit assay (Milliplex MAP kit, HCYTMAG-60K-PX41, Millipore, Massachusetts, United States). The mean duration of use of PGA in both groups did not differ significantly (median 1.3 years in bimatoprost and 1.1 years in latanoprost eyes, p = 0.6).
resultsThe tear MMP-9 expression was higher in eyes receiving latanoprost while the MMP-2 expression was higher in eyes receiving bimatoprost with MMP1 protein levels being higher in the former. Latanoprost treated eyes had marginally elevated tear cytokines involved in tissue remodelling while bimatoprost eyes showed elevated cytokines regulating allergic pathways.
conclusionDifferential cytokine and MMP expression indicates differential signalling pathways mediating different cellular effects (evident as clinical and side effects) with the two drugs which can be explored further.
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Registered trials
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