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Zeppieri M, Salvetat ML, Beltrami AP, Cesselli D, Bergamin N, Russo R, Cavaliere F, Varano GP, Alcalde I, Merayo J, Brusini P, Beltrami CA, Parodi PC. Human adipose-derived stem cells for the treatment of chemically burned rat cornea: preliminary results. Curr Eye Res 2013; 38:451-463. [PMID: 23373736 DOI: 10.3109/02713683.2012.763100] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] [Imported: 01/15/2025]
Abstract
PURPOSE Adipose-derived stem cells (ADSC) are multipotent, safe, non-immunogenic and can differentiate into functional keratocytes in situ. The topical use of ADSC derived from human processed lipoaspirate was investigated for treating injured rat cornea. METHODS A total of 19 rats were used. Six animals initially underwent corneal lesion experiments with 0.5 N NaOH (right eye) and 0.2 N (left). The 0.2 NaOH protocol was then used in 13 rats. All 26 eyes of 13 rats eyes received topical azythromycin bid for 3 d and divided into five treatment groups (n = 5 eyes/group), which included: control, stem cells, serum, stem + serum and adipose (raw human lipoaspirate). The four treatment groups received topical treatment three times daily for 3 d. Stem cells were isolated and harvested from human lipoaspirate. Topical eye drops were prepared daily with 1 × 10(5) cells/treatment. Fluorescein positive defect area and light microscope assessment was performed at 20, 28, 45, 50 and 74 h. Animals were sacrificed at 74 h for histological evaluation. Data were statistically analyzed for differences amongst groups. RESULTS The stem cell-treated eyes had significantly smaller epithelial defects at each time point compared to control- and adipose-treated eyes (p < 0.05). This group showed slightly better epithelium healing than the serum and combined group, yet not significantly different. Histology showed that stem cell-treated corneas had complete re-epithelization, with less inflammatory cells and limited fibroblast activation structure compared with the control eyes. CONCLUSIONS Our preliminary results show that topical treatment with ADSC seems to improve corneal wound healing.
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MESH Headings
- Adipose Tissue/cytology
- Animals
- Burns, Chemical/pathology
- Burns, Chemical/physiopathology
- Burns, Chemical/surgery
- Disease Models, Animal
- Epithelium, Corneal/pathology
- Epithelium, Corneal/physiology
- Epithelium, Corneal/surgery
- Eye Burns/pathology
- Eye Burns/physiopathology
- Eye Burns/surgery
- Fluorescent Dyes
- Humans
- Male
- Pilot Projects
- Rats
- Rats, Wistar
- Staining and Labeling
- Statistics, Nonparametric
- Stem Cell Transplantation/methods
- Transplantation, Heterologous
- Wound Healing/physiology
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Zeppieri M, Salvetat ML, Beltrami A, Cesselli D, Russo R, Alcalde I, Merayo-Lloves J, Brusini P, Parodi PC. Adipose Derived Stem Cells for Corneal Wound Healing after Laser Induced Corneal Lesions in Mice. J Clin Med 2017; 6:115. [PMID: 29206194 PMCID: PMC5742804 DOI: 10.3390/jcm6120115] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 11/24/2017] [Accepted: 11/30/2017] [Indexed: 02/05/2023] [Imported: 01/15/2025] Open
Abstract
The aim of our study was to assess the clinical effectiveness of topical adipose derived stem cell (ADSC) treatment in laser induced corneal wounds in mice by comparing epithelial repair, inflammation, and histological analysis between treatment arms. Corneal lesions were performed on both eyes of 40 mice by laser induced photorefractive keratectomy. All eyes were treated with topical azythromycin bid for three days. Mice were divided in three treatment groups (n = 20), which included: control, stem cells and basic serum; which received topical treatment three times daily for five consecutive days. Biomicroscope assessments and digital imaging were performed by two masked graders at 30, 54, 78, 100, and 172 h to analyze extent of fluorescein positive epithelial defect, corneal inflammation, etc. Immunohistochemical techniques were used in fixed eyes to assess corneal repair markers Ki67, α Smooth Muscle Actin (α-SMA) and E-Cadherin. The fluorescein positive corneal lesion areas were significantly smaller in the stem cells group on days 1 (p < 0.05), 2 (p < 0.02) and 3. The stem cell treated group had slightly better and faster re-epithelization than the serum treated group in the initial phases. Comparative histological data showed signs of earlier and better corneal repair in epithelium and stromal layers in stem cell treated eyes, which showed more epithelial layers and enhanced wound healing performance of Ki67, E-Cadherin, and α-SMA. Our study shows the potential clinical and histological advantages in the topical ADSC treatment for corneal lesions in mice.
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research-article |
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Zeppieri M, Brusini P, Parisi L, Johnson CA, Sampaolesi R, Salvetat ML. Pulsar perimetry in the diagnosis of early glaucoma. Am J Ophthalmol 2010; 149:102-112. [PMID: 19800607 DOI: 10.1016/j.ajo.2009.07.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 07/16/2009] [Accepted: 07/16/2009] [Indexed: 02/05/2023] [Imported: 01/15/2025]
Abstract
PURPOSE To assess the ability of Pulsar perimetry (Pulsar) in detecting early glaucomatous visual field (VF) damage in comparison with Frequency Doubling Technology (FDT), Scanning Laser Polarimetry (SLP, GDx VCC), and Heidelberg Retina Tomography (HRT). DESIGN Prospective observational cross-sectional case study. METHODS This multicenter study included: 87 ocular hypertensives (OHT); 67 glaucomatous optic neuropathy (GON) patients; 75 primary open-angle glaucoma (POAG) patients; and 90 normals. All patients underwent standard automated perimetry (SAP) HFA 30-2, Pulsar T30W, FDT N-30, HRT II, and GDx VCC. Area under Receiver Operating Characteristic Curves (AROCs) for discriminating between healthy and glaucomatous eyes and agreement among instruments were determined. RESULTS The best parameters for Pulsar, FDT, HRT, and GDx were, respectively: loss variance square root; no. of areas with P< 5%; Cup-Shape-Measure; and Nerve Fiber Indicator (NFI). In detecting POAG eyes, Pulsar (AROC, 0.90) appeared comparable with FDT (0.89) and significantly better than HRT (0.82) and GDx (0.79). For GON, Pulsar ability (0.74) was higher than GDx (0.69) and lower than FDT (0.80) and HRT (0.83). The agreement among instruments ranged from 0.12 to 0.56. Pulsar test duration was significantly shorter than SAP and FDT (P< .001). CONCLUSIONS Pulsar T30W test is a rapid and easy perimetric method, showing higher sensitivity than SAP in detecting early glaucomatous VF loss. Its diagnostic ability is good for detecting early perimetric POAG eyes and fair for GON eyes. Pulsar performance was comparable with FDT, HRT, and GDx, even if the agreement between instruments was poor to fair.
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Comparative Study |
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Zeppieri M, Demirel S, Kent K, Johnson CA. Perceived spatial frequency of sinusoidal gratings. Optom Vis Sci 2008; 85:318-329. [PMID: 18451736 DOI: 10.1097/opx.0b013e31816be9fd] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] [Imported: 01/15/2025] Open
Abstract
PURPOSE The "frequency-doubling" effect or illusion, in which the apparent spatial frequency of a grating appears to be doubled, is produced when a low spatial frequency sinusoidal grating is counterphase flickered at a high temporal frequency. This study examines changes in apparent spatial frequency of sinusoids of various spatiotemporal content after equating them for detectability. METHODS Detection contrast thresholds were determined for various spatiotemporal gratings. The perceived spatial frequency was then evaluated using stimuli that were four and six times detection threshold. Match ratios were determined for each spatiotemporal combination, whereby the periodicity of a stationary sinusoid was matched with that of a counterphase flickered grating. The same matching task was repeated under different matching task instructions for five randomly chosen spatiotemporal combinations. RESULTS Match ratios were fractional for many spatiotemporal combinations. Apparent spatial frequency ranged from less than veridical to greater than double depending on observer and spatiotemporal stimulus content. The effect of task instruction on match ratios was very small, yet significant. CONCLUSIONS The appearance of fractional spatial frequency percepts draws into question the notion that frequency-doubling is solely generated by spatially non-linear Y-type magnocellular ganglion cells.
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Research Support, N.I.H., Extramural |
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Zeppieri M, Brusini P, Miglior S. Corneal thickness and functional damage in patients with ocular hypertension. Eur J Ophthalmol 2005; 15:196-201. [PMID: 15812759 DOI: 10.1177/112067210501500203] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] [Imported: 01/15/2025]
Abstract
PURPOSE To correlate functional damage over time detected by standard automated perimetry (SAP) and frequency doubling technology (FDT) with central corneal thickness (CCT) in patients with ocular hypertension (OHT). METHODS Seventy-eight OHT patients underwent CCT measurements, SAP, and FDT (the latter two also after 12 and 18 months). Patients were divided into three equally sized groups of 26 patients each: thin (< 540 microm), normal (540-580 microm), and thick cornea (> 580 microm). The frequency of abnormal FDT and SAP results was analyzed over time (Pearson chi2 test). RESULTS Six of 26 patients with thin corneas (23.1%) presented an abnormal FDT test at baseline, compared to 1 of 26 (3.8%) in the normal thickness cornea group and 1 of 26 (3.8%) in the thick cornea group. After 12 months, the abnormal FDT tests were as follows, respectively: 9 of 26 (34.6%), 2 of 26 (7.7%), and 2 of 26 (7.7%). For SAP the abnormal results were as follows, respectively: 8 (30.1%), 5 (19.2%), and 2 (7.7%). After 18 months, the abnormal FDT tests were as follows, respectively: 16 (61.5%), 5 (19.2%), and 5 (19.2%). For SAP, the abnormal results were as follows, respectively: 10 (38.5%), 5 (19.2%), and 2 (7.7%). CONCLUSIONS OHT patients with thinner corneas have a greater risk of developing functional damage over time.
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Zeppieri M, Salvetat ML, Salati C. The influence of COVID-19 lockdowns on presentation with spontaneous posterior vitreous detachment to the emergency department in Italy. Front Biosci (Elite Ed) 2021; 13:259-271. [PMID: 34937313 DOI: 10.52586/e883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/09/2021] [Accepted: 10/13/2021] [Indexed: 02/05/2023] [Imported: 01/15/2025]
Abstract
The purpose of the study was to analyze the frequency of the spontaneous posterior vitreous detachment (PVD) in patients admitted to an Emergency Eye Department in Italy (EED) during the COVID-19 pandemic national lockdown in 2020 compared with the similar time period in 2019. In this retrospective observational study, patient records for ophthalmology EED patients in the month of April 2020 during the COVID-19 Italian national lockdown, were compared with those for an equivalent one-month period in 2019. Diagnoses, gender, and age were assessed. Unpaired Student t-tests were used for continuous variables. Poisson regression was used for count analysis to compare categorical variables. Chi-square test was applied to asses proportion differences. In comparison with the 2019 equivalent period, there was a significant decrease in the overall number of EED visits and in the number of patients presenting with a spontaneous PVD during the 2020 lockdown (-41.6% and -49%, respectively). During the 2020 lockdown, all diagnostic categories showed less patient admittance, however, the proportions remained stable when considering the entire cohort. The proportion of urgent visits was 90% in 2020 and 86% in 2019 (p = 0.66). The proportion of EED patients affected by spontaneous PVD was comparable between the two study periods (8.4% in 2020 vs. 9.6% in 2019, p = 0.34). Patients presenting with spontaneous PVD in both periods were significantly older when compared to patients with other pathologies (mean age of 63years in 2020 and 64years in 2019, p < 0.001). There was a significant bias in female gender (61.2% in 2019 and 60% in 2020, p < 0.05). There was a significant decrease of accesses to the EED during COVID-19 2020 lockdown. Patients affected by spontaneous PVD were about 50% less compared with the same period of 2019. Risk factors for the development of spontaneous PVD were older age and female gender. PVD represents a potentially visual function threatening condition because it can cause retinal ruptures and retinal detachment. Patients need to be educated to get urgent ophthalmic assessments in the presence of important acute signs and symptoms, like floaters and flashes, even in the presence of a lockdown.
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Observational Study |
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Zeppieri M, Gagliano C, Di Maita M, Avitabile A, Gagliano G, Dammino E, Tognetto D, Cordeiro MF, D’Esposito F. Isolated and Syndromic Genetic Optic Neuropathies: A Review of Genetic and Phenotypic Heterogeneity. Int J Mol Sci 2025; 26:3892. [PMID: 40332750 PMCID: PMC12027957 DOI: 10.3390/ijms26083892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2025] [Revised: 04/14/2025] [Accepted: 04/16/2025] [Indexed: 05/08/2025] [Imported: 06/16/2025] Open
Abstract
Nonsyndromic and syndromic hereditary optic neuropathies (HONs) encompass a variety of genetic illnesses that cause progressive optic nerve damage, resulting in considerable vision impairment. These disorders result from pathogenic variants in mitochondrial or nuclear DNA, impacting essential cellular processes like oxidative phosphorylation, mitochondrial dynamics, and neuroprotection. Advances in next-generation sequencing (NGS) have significantly improved the identification of genetic variations, enabling precise diagnoses and genotype-phenotype correlations. This review consolidates current knowledge regarding the classification, molecular pathogenesis, clinical manifestations, diagnostic methodologies, and emerging therapeutic strategies for HONs. The critical role of mitochondrial dysfunction in optic nerve degeneration highlights the necessity for multimodal therapeutic approaches. Recent clinical trials evaluating gene therapy for Leber hereditary optic neuropathy (LHON) and neuroprotective strategies in dominant optic atrophy (DOA) are discussed. Additionally, individualized therapeutic interventions, as demonstrated by recent case studies involving tailored gene therapies, are evaluated. The integration of molecular and imaging biomarkers in future personalized treatment strategies aims to enhance prognosis and therapeutic outcomes.
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Review |
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Zeppieri M, Gagliano C, D’Esposito F, Musa M, Gattazzo I, Zanella MS, Rossi FB, Galan A, Babighian S. Eicosapentaenoic Acid (EPA) and Docosahexaenoic Acid (DHA): A Targeted Antioxidant Strategy to Counter Oxidative Stress in Retinopathy. Antioxidants (Basel) 2024; 14:6. [PMID: 39857340 PMCID: PMC11759855 DOI: 10.3390/antiox14010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2024] [Revised: 12/16/2024] [Accepted: 12/23/2024] [Indexed: 01/27/2025] [Imported: 01/28/2025] Open
Abstract
Omega-3 fatty acids are critical components of cell membranes, including those in the retina. Specifically, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are the primary omega-3 fatty acids that have been studied for their potential benefits in retinal health, preventing the progression of retinopathy. Several studies have shown that a higher intake of omega-3 fatty acids is associated with a lower risk of developing diabetic retinopathy and age-related macular degeneration (AMD). Reviewing clinical trials and observational studies that support the protective role of omega-3s in retinal disorders is essential. This comprehensive review aims to evaluate the current literature on the role of omega-3 fatty acids, exploring their mechanisms of action and anti-inflammatory, anti-angiogenic, and neuroprotective roles in the retina. Omega-3s have been shown to inhibit abnormal blood vessel growth in the retina, which is a significant factor in proliferative diabetic retinopathy and neovascular AMD. Furthermore, omega-3 fatty acids are often studied with other nutrients, such as lutein, zeaxanthin, and vitamins, for their synergistic effects on retinal health. Reviewing these combinations can help understand how omega-3s can be part of a comprehensive approach to preventing or treating retinopathies, especially in diabetic patients. This review emphasizes the preventive function of EPA and DHA in alleviating oxidative stress-related damage in retinal diseases, concentrating on their antioxidative mechanisms.
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Review |
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Zeppieri M. Ophthalmologic implications to consider when using hydroxychloroquine to treat COVID-19 and induced arthritis. World J Exp Med 2023; 13:95-98. [PMID: 37767541 PMCID: PMC10520758 DOI: 10.5493/wjem.v13.i4.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/16/2023] [Accepted: 06/16/2023] [Indexed: 09/15/2023] [Imported: 01/15/2025] Open
Abstract
As the world continues to grapple with the novel coronavirus [coronavirus disease 2019 (COVID-19)], many treatments have been proposed to help alleviate the symptoms and reduce the mortality rate. Hydroxychloroquine (HCQ) is an antimalarial drug that is typically used for several autoimmune, rheumatic, and dermatological conditions. It has also been considered to treat and prevent COVID-19 and subsequent arthritis associated with the infection. This drug is known to cause retinal toxicity, which can lead to vision impairment or loss. While the exact mechanism is not yet fully understood, it is thought to be due to the accumulation of the drug in the retinal pigment epithelium. The risk of toxicity increases with long-term use or with high doses of the drug and is more likely to occur in patients with pre-existing retinal diseases or those who are predisposed to retinal diseases. In this context, several steps can be taken to monitor and minimize the risk of ophthalmological adverse events when using HCQ to treat patients with COVID-19.
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Letter to the Editor |
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Zeppieri M. Pigment dispersion syndrome: A brief overview. J Clin Transl Res 2022; 8:344-350. [PMID: 36518550 PMCID: PMC9741933 DOI: 10.18053/jctres.08.202205.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 02/05/2023] [Imported: 01/15/2025] Open
Abstract
BACKGROUND Pigment dispersion syndrome (PDS) is characterized by dispersion of pigment in the anterior chamber structures and can present with deposits on the central corneal endothelium or Krukenberg spindle, iris trans-illumination spoke-like defects, and increased pigmentation in the iridocorneal angle. It is more common in myopic patients with a predominance in young males in the third to fifth decade of life that affects about 1-2% of the population. PDS is a risk factor and can give lead to a rise in intraocular pressure (IOP) and secondary glaucoma. Pigmentary glaucoma (PG) can develop from PDS in the presence of elevated IOP coupled with glaucomatous optic neuropathy, retinal nerve fiber thinning, and/or visual field defects. PDS and PG have the same clinical features, representing different levels of severity on the same clinical spectrum. RELEVANCE FOR PATIENTS Early diagnosis, appropriate management, and follow-up of patients with PDS are important to prevent vision deterioration or blindness due to glaucomatous optic neuropathy.
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Review |
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Zeppieri M, Gagliano C, Tognetto D, Musa M, Rossi FB, Greggio A, Gualandi G, Galan A, Babighian S. Unraveling the Mechanisms, Clinical Impact, Comparisons, and Safety Profiles of Slow-Release Therapies in Glaucoma. Pharmaceutics 2025; 17:580. [PMID: 40430872 PMCID: PMC12115007 DOI: 10.3390/pharmaceutics17050580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2025] [Revised: 04/18/2025] [Accepted: 04/23/2025] [Indexed: 05/28/2025] [Imported: 05/28/2025] Open
Abstract
Glaucoma, a primary cause of irreversible blindness, is most effectively managed by reducing intraocular pressure (IOP). Topical eye drops, which are conventional treatments, frequently encounter constraints regarding patient compliance, inconsistent dosage, and tolerability. Slow-release drug delivery systems have emerged as a promising innovation in response to these challenges. The objective of these systems is to enhance the efficacy of treatment and patient compliance by ensuring the consistent and sustained delivery of therapeutic agents over extended periods. Implantable devices, injectable formulations, and external applications are all categorized as slow-release therapies. By delivering medication directly to the target tissues in a controlled manner, these technologies have the potential to circumvent common issues associated with traditional regimens, such as forgotten doses or improper administration. These systems have been shown to obtain clinically meaningful reductions in IOP in studies, with some demonstrating efficacy that is comparable to that of established daily topical treatments. Despite their potential, slow-release therapies encounter obstacles that necessitate resolution. Potential complications during implantation or removal, long-term biocompatibility, and the cost of treatment are all areas of concern. Furthermore, further investigation is required to comprehensively assess their relative economic feasibility, patient acceptability, and long-term safety profiles in comparison to conventional treatments. This review summarizes the most recent findings in the scientific literature, underlining the role and possible limits of slow-release therapies in glaucoma with the aim of offering a comprehensive understanding of their potential clinical applications and challenges. This emphasizes the potential for these innovations to revolutionize care by addressing current knowledge gaps, while also emphasizing the areas in which further development and research are required.
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Review |
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Zeppieri M, Brusini P, Johnson CA, Salvetat ML. Reply. Am J Ophthalmol 2011; 152:501-502. [DOI: 10.1016/j.ajo.2011.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] [Imported: 01/31/2025]
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Zeppieri M, Musa M. Beyond the Dusty Fog: Local Eye Drop Therapy and Potentially New Treatment Alternatives in Pseudoexfoliative Glaucoma. Curr Med Chem 2024; 31:1608-1619. [PMID: 37855339 DOI: 10.2174/0109298673255220231010073215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/19/2023] [Accepted: 08/27/2023] [Indexed: 10/20/2023] [Imported: 01/15/2025]
Abstract
Pseudoexfoliative glaucoma (PEG) is a type of secondary open-angle glaucoma characterized by the accumulation of whitish-gray material on the trabecular meshwork and lens, leading to an increase in intraocular pressure (IOP) and optic nerve damage. Local eye drop therapy is one of the first-line treatments for PEG, which include prostaglandin analogues, beta-blockers, and alpha-adrenergic agonists to lower IOP. New treatments beyond conventional techniques, however, are constantly being developed. One potential treatment proposed for PEG is based on magnetic phage display, which involves using magnetic nanoparticles conjugated to specific peptides or proteins selected using phage display techniques to remove aggregates in the anterior chamber of the eye or inflammatory cells and cytokines that contribute to PEG pathogenesis. Other potential treatments include microRNAs (miRNAs) that are involved in the regulation of gene expression at the post-transcription stages. Gene therapies, nanotechnology, immunotherapy and methods based on stem cells can also be potentially used to target and treat specific tissues and cells responsible for regulating IOP. In addition, photobiomodulation therapy (PBMT), a non-invasive procedure that utilizes low-level laser therapy to improve cellular function and promote tissue repair, can prove an interesting alternative in treating PEG. The aim of our mini-review is to provide a brief overview of these innovative methods that appear to offer potentially promising treatment options for PEG.
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Review |
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Zeppieri M, Gagliano C, D'Esposito F, Longo A, Bale BI, Suleman A, Chukwuyem E, Tognetto D, Musa M. Exploring the Potentials: Therapeutic Uses of Mesenchymal Stem Cells in Treating Corneal Conditions. DISCOVERY MEDICINE 2025; 37:433-441. [PMID: 40116092 DOI: 10.24976/discov.med.202537194.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2025] [Imported: 03/31/2025]
Abstract
Corneal disorders, encompassing injuries, infections, and degenerative diseases, are major contributors to visual impairment globally. Conventional procedures, including corneal transplantation and pharmacological treatments, encounter constraints such as donor shortages, rejection risks, and diminished effectiveness in extreme instances. Mesenchymal stem cells (MSCs) have emerged as viable therapeutic alternatives owing to their regeneration potential, immunomodulatory characteristics, and capacity to differentiate into corneal cell types. This study examines the therapeutic potential of MSCs in addressing various corneal illnesses through the analysis of preclinical studies, clinical trials, and current breakthroughs. MSCs facilitate corneal wound healing, diminish scarring, and reinstate transparency via processes including paracrine signaling, extracellular matrix remodeling, and anti-inflammatory actions. Although early-phase clinical trials indicate the safety and feasibility of MSC-based therapeutics, obstacles persist in optimizing delivery techniques, assuring cell viability, and creating uniform protocols. Additional research is necessary to address these issues and validate MSCs as a feasible clinical alternative. This review aims to summarize the therapeutic applications, challenges, and future prospects of mesenchymal stem cells in corneal treatments, emphasizing their importance as emerging alternatives to traditional therapies.
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Review |
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Zeppieri M, Marsili S, Enaholo ES, Shuaibu AO, Uwagboe N, Salati C, Spadea L, Musa M. Optical Coherence Tomography (OCT): A Brief Look at the Uses and Technological Evolution of Ophthalmology. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:2114. [PMID: 38138217 PMCID: PMC10744394 DOI: 10.3390/medicina59122114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] [Imported: 01/15/2025]
Abstract
Medical imaging is the mainstay of clinical diagnosis and management. Optical coherence tomography (OCT) is a non-invasive imaging technology that has revolutionized the field of ophthalmology. Since its introduction, OCT has undergone significant improvements in image quality, speed, and resolution, making it an essential diagnostic tool for various ocular pathologies. OCT has not only improved the diagnosis and management of ocular diseases but has also found applications in other fields of medicine. In this manuscript, we provide a brief overview of the history of OCT, its current uses and diagnostic capabilities to assess the posterior segment of the eye, and the evolution of this technology from time-domain (TD) to spectral-domain (SD) and swept-source (SS). This brief review will also discuss the limitations, advantages, disadvantages, and future perspectives of this technology in the field of ophthalmology.
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Review |
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Zeppieri M, Cazzato V, Surico PL, Caputo GG, Parodi PC, D'Esposito F, Musa M, Gagliano C, Scarabosio A. Comparative Analysis of Anterior vs Posterior Approaches in Eyelid Ptosis Repair. DISCOVERY MEDICINE 2025; 37:598-607. [PMID: 40287797 DOI: 10.24976/discov.med.202537195.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2025] [Imported: 04/30/2025]
Abstract
Eyelid ptosis, characterized by the drooping of the upper eyelid, can significantly impair vision and aesthetics. Surgical repair is often necessary, and the choice between the anterior and posterior approaches is crucial for optimal outcomes. This review compares these two techniques based on efficacy, safety, and recovery. The anterior approach, typically involving an external incision along the eyelid crease, allows direct access to the levator muscle or aponeurosis for resection or advancement. This method is particularly advantageous in cases of aponeurotic ptosis where direct visualization is often necessary. Benefits include enhanced control over eyelid height and contour, with the potential for superior cosmetic outcomes due to hidden incisions. However, the anterior approach carries a higher risk of complications such as hematoma, infection, and scarring, necessitating careful patient selection and surgical expertise. Conversely, the posterior approach, involving an internal incision through the conjunctiva, is less invasive and avoids external scars. This technique is predominantly used for mild to moderate ptosis, especially in patients with preserved levator function. It targets Müller's muscle, which is less traumatic and associated with a shorter recovery time and lower complication rates. The posterior approach is favored for its simplicity and reduced risk profile, though it offers limited visualization and may not be suitable for all ptosis types. In conclusion, both the anterior and posterior approaches to eyelid ptosis repair have distinct advantages and limitations. The choice of technique should be individualized, considering factors such as the severity of ptosis, patient anatomy, desired outcomes, and potential risks. A thorough preoperative assessment and discussion of patient expectations are essential to achieving the best surgical results.
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Zeppieri M, Gardini L, Culiersi C, Fontana L, Musa M, D’Esposito F, Surico PL, Gagliano C, Sorrentino FS. Novel Approaches for the Early Detection of Glaucoma Using Artificial Intelligence. Life (Basel) 2024; 14:1386. [PMID: 39598184 PMCID: PMC11595922 DOI: 10.3390/life14111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2024] [Revised: 10/14/2024] [Accepted: 10/26/2024] [Indexed: 11/29/2024] [Imported: 01/15/2025] Open
Abstract
BACKGROUND If left untreated, glaucoma-the second most common cause of blindness worldwide-causes irreversible visual loss due to a gradual neurodegeneration of the retinal ganglion cells. Conventional techniques for identifying glaucoma, like optical coherence tomography (OCT) and visual field exams, are frequently laborious and dependent on subjective interpretation. Through the fast and accurate analysis of massive amounts of imaging data, artificial intelligence (AI), in particular machine learning (ML) and deep learning (DL), has emerged as a promising method to improve the early detection and management of glaucoma. AIMS The purpose of this study is to examine the current uses of AI in the early diagnosis, treatment, and detection of glaucoma while highlighting the advantages and drawbacks of different AI models and algorithms. In addition, it aims to determine how AI technologies might transform glaucoma treatment and suggest future lines of inquiry for this area of study. METHODS A thorough search of databases, including Web of Science, PubMed, and Scopus, was carried out to find pertinent papers released until August 2024. The inclusion criteria were limited to research published in English in peer-reviewed publications that used AI, ML, or DL to diagnose or treat glaucoma in human subjects. Articles were chosen and vetted according to their quality, contribution to the field, and relevancy. RESULTS Convolutional neural networks (CNNs) and other deep learning algorithms are among the AI models included in this paper that have been shown to have excellent sensitivity and specificity in identifying glaucomatous alterations in fundus photos, OCT scans, and visual field tests. By automating standard screening procedures, these models have demonstrated promise in distinguishing between glaucomatous and healthy eyes, forecasting the course of the disease, and possibly lessening the workload of physicians. Nonetheless, several significant obstacles remain, such as the requirement for various training datasets, outside validation, decision-making transparency, and handling moral and legal issues. CONCLUSIONS Artificial intelligence (AI) holds great promise for improving the diagnosis and treatment of glaucoma by facilitating prompt and precise interpretation of imaging data and assisting in clinical decision making. To guarantee wider accessibility and better patient results, future research should create strong generalizable AI models validated in various populations, address ethical and legal matters, and incorporate AI into clinical practice.
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Zeppieri M. Advantages and future outlooks in the use of telemedicine in liver transplantation. World J Transplant 2025; 15:104825. [DOI: 10.5500/wjt.v15.i3.104825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2025] [Revised: 02/12/2025] [Accepted: 02/19/2025] [Indexed: 04/18/2025] [Imported: 05/03/2025] Open
Abstract
To maintain care during the coronavirus disease 2019 outbreak, telemedicine was implemented quickly. Jowell et al's pandemic study on telehealth integration and liver transplant evaluation is examined in this editorial. The study showed that telehealth did not affect clinical outcomes including time to evaluation, listing rates, or pre-transplant death. The study found that telehealth did not increase sociodemographic inequalities, suggesting a fair care framework. The editorial discusses how telemedicine in hepatology might help patients receive expert treatment while reducing logistical and financial burdens. Telehealth can democratize liver transplantation by delivering equivalent clinical results as in-person examinations. However, the editorial highlights technological barriers, difficulties in remotely assessing mental and physical health, and the need for specialized outreach to underserved communities. After the pandemic, telemedicine is essential to a more flexible, patient-centered healthcare system. The editorial encourages creativity and research to overcome challenges, improve hybrid care models, and ensure telehealth's egalitarian and successful potential. Pandemic insights can improve liver transplantation treatment and outcomes for diverse patient populations.
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Zeppieri M, Gagliano C, Spadea L, Salati C, Chukwuyem EC, Enaholo ES, D’Esposito F, Musa M. From Eye Care to Hair Growth: Bimatoprost. Pharmaceuticals (Basel) 2024; 17:561. [PMID: 38794131 PMCID: PMC11124470 DOI: 10.3390/ph17050561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/17/2024] [Accepted: 04/25/2024] [Indexed: 05/26/2024] [Imported: 01/15/2025] Open
Abstract
BACKGROUND Bimatoprost has emerged as a significant medication in the field of medicine over the past several decades, with diverse applications in ophthalmology, dermatology, and beyond. Originally developed as an ocular hypotensive agent, it has proven highly effective in treating glaucoma and ocular hypertension. Its ability to reduce intraocular pressure has established it as a first-line treatment option, improving management and preventing vision loss. In dermatology, bimatoprost has shown promising results in the promotion of hair growth, particularly in the treatment of alopecia and hypotrichosis. Its mechanism of action, stimulating the hair cycle and prolonging the growth phase, has led to the development of bimatoprost-containing solutions for enhancing eyelash growth. AIM The aim of our review is to provide a brief description, overview, and studies in the current literature regarding the versatile clinical use of bimatoprost in recent years. This can help clinicians determine the most suitable individualized therapy to meet the needs of each patient. METHODS Our methods involve a comprehensive review of the latest advancements reported in the literature in bimatoprost formulations, which range from traditional eye drops to sustained-release implants. These innovations offer extended drug delivery, enhance patient compliance, and minimize side effects. RESULTS The vast literature published on PubMed has confirmed the clinical usefulness of bimatoprost in lowering intraocular pressure and in managing patients with glaucoma. Numerous studies have shown promising results in dermatology and esthetics in promoting hair growth, particularly in treating alopecia and hypotrichosis. Its mechanism of action involves stimulating the hair cycle and prolonging the growth phase, leading to the development of solutions that enhance eyelash growth. The global use of bimatoprost has expanded significantly, with applications growing beyond its initial indications. Ongoing research is exploring its potential in glaucoma surgery, neuroprotection, and cosmetic procedures. CONCLUSIONS Bimatoprost has shown immense potential for addressing a wide range of therapeutic needs through various formulations and advancements. Promising future perspectives include the exploration of novel delivery systems such as contact lenses and microneedles to further enhance drug efficacy and patient comfort. Ongoing research and future perspectives continue to shape its role in medicine, promising further advancements and improved patient outcomes.
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