scholarly journals Corneal side effects induced by EGFR-inhibitor antibody–drug conjugate ABT-414 in patients with recurrent glioblastoma: a prospective clinical and confocal microscopy study

2020 ◽  
Vol 12 ◽  
pp. 175883592090754 ◽  
Author(s):  
Raffaele Parrozzani ◽  
Giuseppe Lombardi ◽  
Edoardo Midena ◽  
Francesca Leonardi ◽  
Davide Londei ◽  
...  
Keyword(s):  
Side Effects ◽  
Confocal Microscopy ◽  
Corneal Epithelium ◽  
Recurrent Glioblastoma ◽  
Treatment Discontinuation ◽  
Nerve Plexus ◽  
Egfr Inhibitor ◽  
Corneal Nerves ◽  
Subbasal Nerve Plexus

Background: The aim of this study was to prospectively analyse, for the first time worldwide by in vivo clinical confocal microscopy (CCM), corneal side effects secondary to the use of epidermal growth factor receptor (EGFR) inhibitor depatuxizumab mafodotin (ABT-414) in a cohort of patients affected by EGFR-amplified recurrent glioblastoma. Methods: Each enrolled patient underwent full ophthalmologic examination including in vivo CCM of the cornea. Each patient was examined at baseline and every 2 weeks during treatment as long as patient conditions allowed it. Results: A total of 10 patients were consecutively enrolled. Median follow-up was 5 months. No Common Terminology Criteria for Adverse Events Version 4.0 grade 4 toxicity was documented. Two (20%) grade 3 toxicities were documented at week 8. CCM examination detected in all eyes multiple and diffuse hyperreflective white round spots in the corneal basal epithelial layers (100%), progressive subbasal nerve plexus layer fibres fragmentation followed by full disappearance (100%) and appearance of round cystic structures in the corneal epithelium (100%). All CCM documented side effects reached the peak of prevalence and severity after a median of 3 infusions. After treatment discontinuation, the reversibility of corneal side effects was documented at CCM after a median of 4 weeks. Conclusion: ABT-414 toxicity is not only directed to the corneal epithelium, but also to corneal nerves. Side effects are detectable in all treated patients and CCM documents early corneal epithelium and subbasal nerve plexus toxicity, with subsequent progressive restoration after treatment discontinuation. Ocular side effects due to ABT-414 can be manageable.

Image Reconstruction of the Subbasal Nerve Plexus with In Vivo Confocal Microscopy

2011 ◽  
Vol 52 (9) ◽  
pp. 5022 ◽  
Author(s):  
Stephan Allgeier ◽  
Andrey Zhivov ◽  
Franz Eberle ◽  
Bernd Koehler ◽  
Susanne Maier ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Confocal Microscopy ◽  
Nerve Plexus ◽  
In Vivo Confocal Microscopy ◽  
Subbasal Nerve Plexus

scholarly journals In Vivo Confocal Microscopy of the Corneal Sub-Basal Nerve plexus in Medically Controlled Glaucoma

2022 ◽  
pp. 1-8
Author(s):  
Luca Agnifili ◽  
Lorenza Brescia ◽  
Edoardo Villani ◽  
Giada D'Onofrio ◽  
Michele Figus ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Nerve Fibers ◽  
Nerve Plexus ◽  
Ocular Surface Disease Index ◽  
Corneal Nerves ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

The present study investigated the corneal sub-basal nerve plexus (SNP) modifications in glaucoma. Ninety-five glaucomatous patients were enrolled and divided into Group 1 and 2, preserved and preservative-free mono-therapy (30 and 28 patients), and Group 3, multi-therapy (37). Thirty patients with dry eye disease (DED) and 32 healthy subjects (HC) served as controls. In vivo confocal microscopy evaluated the nerve fibers density (CNFD), length (CNFL), thickness (CNFT), branching density (CNBD), and dendritic cell density (DCD). CNFD, CNFL, and CNBD were reduced in Group 3 and DED compared to HC (p < 0.05). CNFL was reduced in Group 3 compared to Group 2 (p < 0.05), and in Group 1 compared to HC (p < 0.001). CNFD, CNBD, and CNFT did not differ between glaucomatous groups. DCD was higher in Group 3 and DED compared to HC and Group 2 (p < 0.01). Group 3 showed worse ocular surface disease index (OSDI) scores compared to Group 1, 2, and HC (p < 0.05). CNFL and DCD correlated with OSDI score in Group 3 (r = −0.658, p < 0.001; r = 0.699, p = 0.002). Medical therapy for glaucoma harms the corneal nerves, especially in multi-therapy regimens. Given the relations with the OSDI score, SNP changes seem features of glaucoma therapy-related OSD and negatively affects the patient's quality of life.

scholarly journals An in vivo confocal microscopy study of corneal changes in patients with systemic sclerosis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Eszter Szalai ◽  
Gabriella Szucs ◽  
Szilvia Szamosi ◽  
Zsuzsa Aszalos ◽  
Ildiko Afra ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Confocal Microscopy ◽  
Ocular Surface ◽  
Healthy Subjects ◽  
Ocular Surface Disease ◽  
Nerve Plexus ◽  
In Vivo Confocal Microscopy ◽  
Software Analysis ◽  
Subbasal Nerve Plexus

AbstractTo investigate corneal microstructure of systemic sclerosis (SSc) patients using in vivo confocal microscopy (IVCM). 33 patients with SSc and 30 age-matched healthy subjects were recruited. All participants underwent comprehensive ophthalmic examination including IVCM (Heidelberg Retina Tomograph III, Heidelberg Engineering GmbH, Heidelberg, Germany) and ocular surface evaluation. Subbasal nerve plexus morphology was investigated using automated software analysis (ACCMetrics V3; University of Manchester, Manchester, UK). Keratocyte cell densities in the anterior stroma were significantly lower in patients with SSc compared to controls (P < 0.0001). In 7 SSc patients no keratocyte nuclei were identified in the anterior stroma and in most patients scattered hyperreflective punctate material were observed in the anterior stroma. Significantly lower subbasal nerve fiber parameters were found in patients with SSc compared to healthy subjects (P < 0.05). There were no significant correlations between the duration of SSc and any of the corneal cell density values. Tear break-up time values (4.82 ± 3.15 s) and Ocular Surface Disease Index scores (33.27 ± 30.11) were abnormal, Schirmer values (6.78 ± 5.82 mm) were borderline in SSc patients. In SSc, corneal morphological changes and accumulation of punctate material in the stroma was detected with confocal microscopy. Severe ocular surface disease was observed in SSc patients with significant impairment in subbasal nerve plexus morphology resembling peripheral neuropathy.

scholarly journals Wide-field mosaics of the corneal subbasal nerve plexus in Parkinson’s disease using in vivo confocal microscopy

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Reza A. Badian ◽  
Stephan Allgeier ◽  
Fabio Scarpa ◽  
Mattias Andréasson ◽  
Andreas Bartschat ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Confocal Microscopy ◽  
Cellular Level ◽  
Nerve Plexus ◽  
Control Group ◽  
Wide Field ◽  
Image Size ◽  
Subbasal Nerve Plexus

AbstractIn vivo confocal microscopy (IVCM) is a non-invasive imaging technique facilitating real-time acquisition of images from the live cornea and its layers with high resolution (1–2 µm) and high magnification (600 to 800-fold). IVCM is extensively used to examine the cornea at a cellular level, including the subbasal nerve plexus (SBNP). IVCM of the cornea has thus gained intense interest for probing ophthalmic and systemic diseases affecting peripheral nerves. One of the main drawbacks, however, is the small field of view of IVCM, preventing an overview of SBNP architecture and necessitating subjective image sampling of small areas of the SBNP for analysis. Here, we provide a high-quality dataset of the corneal SBNP reconstructed by automated mosaicking, with an average mosaic image size corresponding to 48 individual IVCM fields of view. The mosaic dataset represents a group of 42 individuals with Parkinson’s disease (PD) with and without concurrent restless leg syndrome. Additionally, mosaics from a control group (n = 13) without PD are also provided, along with clinical data for all included participants.

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