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Tadros D, Abdelhalim TI, Sarhan N, El-Anwar N, Elkholy RA, Tahoon D, Sorour OA. Histopathology and electron microscopy evaluation of the sildenafil effect on diabetic rats' retinae. Indian J Ophthalmol 2024; 72:S111-S118. [PMID: 38131552 PMCID: PMC10833156 DOI: 10.4103/ijo.ijo_976_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 09/25/2023] [Accepted: 10/01/2023] [Indexed: 12/23/2023] Open
Abstract
PURPOSE Although there is increasing evidence that phosphodiesterase-5 (PDE-5) inhibitors modify the effect of diabetes on different tissues, its effect on diabetic retinopathy is not well studied. METHODS Forty male Sprague-Dawley (SD) rats were divided into four groups: group I = control group that received no treatment; group II (diabetic group), in which diabetes was induced by a single streptozotocin injection; group III (sildenafil small dose, SSD), in which diabetes was similarly introduced (however, rats received daily oral 1 mg/kg sildenafil citrate (SC) for 3 months); and group IV (sildenafil large dose, SLD), which was as in group 3, but SC was 2.5 mg/kg. After 3 months, globes were removed and retinae were dissected; one globe from each rat was examined by light microscopy (LM), and the other by electron microscopy (EM). RESULTS In contrast to the control group, diabetic rats in group II demonstrated well-established diabetic changes in the form of capillary congestion, decreased cell population, hyaline changes of capillary walls, and degenerated nerve fiber layer by LM. Similarly, EM demonstrated photoreceptor degeneration, mitochondrial cristolysis, and vacuolated depleted cells among other features in group II. These diabetic features were less prominent in group III and nearly absent in group IV. CONCLUSION SC use in the early stages of DR may prevent/delay diabetic retinopathy development or progression in diabetic rat models, an effect that seems to be dose-related.
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Affiliation(s)
- Dina Tadros
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt
| | - Tamer I Abdelhalim
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt
| | - Naglaa Sarhan
- Department of Histology, Faculty of Medicine, Tanta University, Egypt
| | - Noha El-Anwar
- Department of Pathology, Faculty of Medicine, Tanta University, Egypt
- Department of Pathology, Armed Forces, College of Medicine, Egypt
| | - Reem A. Elkholy
- Department of Pharmacology, Faculty of Medicine, Tanta University, Egypt
- Department of Pharmacology, School of Medicine, Badr University In Cairo, Egypt
| | - Dina Tahoon
- Department of Pharmacology, Faculty of Medicine, Tanta University, Egypt
| | - Osama A Sorour
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt
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Sorour OA, Nassar E, Sarhan N, El-Anwar N, ElKholy RA, Tahoon DM, Sweilam A, Tadros D. Chronic sildenafil citrate use decreases retinal vascular endothelial growth factor expression in diabetic rats: a pilot study. Int J Retina Vitreous 2023; 9:42. [PMID: 37460929 PMCID: PMC10351124 DOI: 10.1186/s40942-023-00480-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/01/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND Sildenafil citrate (SC) attenuates endothelial dysfunction. However, its effects on diabetic retinopathy (DR), which is mainly a microvascular disease, remain unclear. Vascular endothelial growth factor (VEGF) is known to be a critical mediator of DR. Therefore, we investigated the effects of SC on diabetic retina by measuring VEGF levels. METHODS In this study, twenty-eight rats were divided into the following groups: group I, the control group; group II, rats with streptozotocin-induced diabetes; group III, rats with streptozotocin-induced diabetes receiving daily oral sildenafil at 1 mg/kg; and group IV, rats with streptozotocin-induced diabetes receiving high-dose daily sildenafil at 2.5 mg/kg. After 3 months, VEGF was measured in the retina specimen in one eye and the vitreous body in the other eye by immunohistochemistry and enzyme-linked immunosorbent assay, respectively. RESULTS We found that VEGF expression in the retina was low in all rats from groups I and IV and in 30% of rats from group III; 80% of rats in group II demonstrated high VEGF expression in the retinae (P < 0.001). VEGF concentrations in the vitreous body samples were 32 ± 2, 61 ± 4, 44 ± 5, and 36 ± 3 pg/l in groups I-IV, respectively (P < 0.001). CONCLUSION VEGF decreased significantly in the eyes of diabetic rats after chronic oral sildenafil citrate treatment. SC may have a modifying/attenuating effect on DR. However, further studies are needed to evaluate its use as an adjunctive treatment.
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Affiliation(s)
- Osama A Sorour
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt.
| | - Elsayed Nassar
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Naglaa Sarhan
- Department of Histology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Noha El-Anwar
- Department of Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Department of Pathology, Armed Forces College of Medicine, Heliopolis, Egypt
| | - Reem A ElKholy
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Department of Pharmacology, School of medicine, Badr University, Badr, Egypt
| | - Dina M Tahoon
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Aalaa Sweilam
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Department of Clinical Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Dina Tadros
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Abstract
PURPOSE To investigate the different clinical manifestations in Egyptian patients with orbital complications of rhinosinusitis (RS) according to the pathology within the paranasal sinuses. METHODS The medical records of patients presented with chronic RS between August 2018 and December 2020 were retrospectively reviewed. RESULTS This study included 64 patients: 28 patients with subperiosteal abscess (SPA), 10 with allergic fungal RS, 6 with isolated fungal RS, 6 with invasive fungal RS, and 14 with mucocele. The most common manifestation was proptosis, limitation of ocular motility, periorbital swelling, and pain. A relative afferent pupillary defect was present in all cases of invasive fungal sinusitis. Surgical interventions were performed in 63 out of 64 cases. All the ophthalmological manifestations were reversible except for patients with invasive fungal rhinosinusitis. CONCLUSION Orbital complications of RS may require early surgical intervention with multidisciplinary counseling between ophthalmologists, otorhinolaryngologists, radiologists, and neurologists.
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Affiliation(s)
- Dina Tadros
- Department of Ophthalmology, Faculty of Medicine, University of Tanta, Tanta, Egypt
| | - Mohamed O Tomoum
- Department of Otorhinolaryngology, Faculty of Medicine, University of Tanta, Tanta, Egypt
| | - Heba M Shafik
- Department of Ophthalmology, Faculty of Medicine, University of Tanta, Tanta, Egypt
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Tadros D, Tomoum MO, Shafik HM. Orbital Complications of Acute Invasive Fungal Rhinosinusitis: A New Challenge in the COVID-19 Convalescent Patients. Clin Ophthalmol 2022; 16:4011-4019. [PMID: 36514418 PMCID: PMC9741827 DOI: 10.2147/opth.s391188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Purpose Increased incidence of acute invasive fungal rhinosinusitis (AIFR) in the setting of COVID-19 is undeniable. This can be attributed to its effect on innate immunity and extensive use of corticosteroids. The goal of our study was to assess the orbital complications of AIFR and its management in the COVID-19 convalescent patients. Methods Our longitudinal prospective study included 45 patients with orbital complications of AIFR in recently recovered COVID-19 patients. We performed otorhinolaryngological, ophthalmological, and neurological examinations to monitor the manifestations of the disease. Computed tomography and contrast enhanced magnetic resonance imaging were performed to detect the extent of infection. Antifungal medications, surgical intervention, and general condition management were all provided to all the patients. Results We reported pre-septal cellulitis, orbital cellulitis, and orbital apex syndrome in 18, 13, and 10 patients, respectively. Four patients had cavernous sinus thrombosis. Mucormycosis and Aspergillus species were detected in 80% and 11.11% of our patients, respectively, while the mixed infection was found in 8.88% of our patients. Diabetes mellitus was the most common cause of immunocompromise (95.55% of our patients). Orbital pain and ophthalmoplegia were the most common ocular manifestations, followed by proptosis and relative afferent pupillary defect. All patients underwent surgical intervention, except for one patient who was unfit for surgery. One patient had orbital exenteration. The ophthalmological manifestations were reversible in cases of orbital and pre-septal cellulitis. The overall survival rate was 66.67%. Conclusion Early diagnosis and treatment of AIFR can decrease the morbidity and mortality rate of affected patients.
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Affiliation(s)
- Dina Tadros
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt,Correspondence: Dina Tadros, Tanta University Hospital, Department of Ophthalmology, El-Geesh Street, Tanta, El-Gharbia, 31515, Egypt, Tel +201224093354, Email
| | - Mohamed O Tomoum
- Department of Otorhinolaryngology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Heba M Shafik
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Siffredi V, Liverani MC, Freitas LGA, Tadros D, Farouj Y, Borradori Tolsa C, Van De Ville D, Hüppi PS, Ha-Vinh Leuchter R. Large-scale brain network dynamics in very preterm children and relationship with socio-emotional outcomes: an exploratory study. Pediatr Res 2022:10.1038/s41390-022-02342-y. [PMID: 36329223 DOI: 10.1038/s41390-022-02342-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/30/2022] [Accepted: 09/24/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Children born very preterm (VPT; <32 weeks' gestation) are at high risk of neurodevelopmental and behavioural difficulties associated with atypical brain maturation, including socio-emotional difficulties. The analysis of large-scale brain network dynamics during rest allows us to investigate brain functional connectivity and its association with behavioural outcomes. METHODS Dynamic functional connectivity was extracted by using the innovation-driven co-activation patterns framework in VPT and full-term children aged 6-9 to explore changes in spatial organisation, laterality and temporal dynamics of spontaneous large-scale brain activity (VPT, n = 28; full-term, n = 12). Multivariate analysis was used to explore potential biomarkers for socio-emotional difficulties in VPT children. RESULTS The spatial organisation of the 13 retrieved functional networks was comparable across groups. Dynamic features and lateralisation of network brain activity were also comparable for all brain networks. Multivariate analysis unveiled group differences in associations between dynamical functional connectivity parameters with socio-emotional abilities. CONCLUSION In this exploratory study, the group differences observed might reflect reduced degrees of maturation of functional architecture in the VPT group in regard to socio-emotional abilities. Dynamic features of functional connectivity could represent relevant neuroimaging markers and inform on potential mechanisms through which preterm birth leads to neurodevelopmental and behavioural disorders. IMPACT Spatial organisation of the retrieved resting-state networks was comparable between school-aged very preterm and full-term children. Dynamic features and lateralisation of network brain activity were also comparable across groups. Multivariate pattern analysis revealed different patterns of association between dynamical functional connectivity parameters and socio-emotional abilities in the very preterm and full-term groups. Findings suggest a reduced degree of maturation of the functional architecture in the very preterm group in association with socio-emotional abilities.
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Affiliation(s)
- Vanessa Siffredi
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland. .,Institute of Bioengineering, Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Écublens, Switzerland. .,Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
| | - Maria Chiara Liverani
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland.,SensoriMotor, Affective and Social Development Laboratory, Faculty of Psychology and Educational Sciences, University of Geneva, Geneva, Switzerland
| | - Lorena G A Freitas
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland.,Institute of Bioengineering, Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Écublens, Switzerland.,Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - D Tadros
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland.,Institute of Bioengineering, Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Écublens, Switzerland.,Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Y Farouj
- Institute of Bioengineering, Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Écublens, Switzerland.,Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Borradori Tolsa
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
| | - Dimitri Van De Ville
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland.,Institute of Bioengineering, Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Écublens, Switzerland.,Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Petra Susan Hüppi
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
| | - Russia Ha-Vinh Leuchter
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
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Eppley SE, Arnold BF, Tadros D, Pasricha N, de Alba Campomanes AG. Accuracy of a universal theoretical formula for power calculation in pediatric intraocular lens implantation. J Cataract Refract Surg 2021; 47:599-605. [PMID: 33181623 DOI: 10.1097/j.jcrs.0000000000000495] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/15/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE To compare the accuracy of Barrett Universal II formula with other formulas (Holladay 2, Hoffer Q, and SRK/T formulas) in the prediction of postoperative refraction for pediatric intraocular lens implantation. SETTING Academic medical center/children's hospital, San Francisco, California. DESIGN Retrospective case series. METHODS Children aged 16 years or younger who underwent cataract extraction and IOL implantation (2012 to 2019) and had refraction assessed at 3 to 16 weeks postoperatively were included. Prediction error (PE) was calculated as postoperative mean spherical equivalent minus the target refraction. Mean, median, and standard deviation was calculated for PE and absolute PE. Performance across covariables (axial length, age, biometry type, keratometry, etc.) was studied, and a multivariate regression analysis was performed using a single prediction model for each formula. RESULTS Sixty-four eyes of 64 patients, aged 1.5 to 15.5 years, were included. Barrett Universal II formula had the lowest mean PE (-0.22 diopters [D]), SD (1.18 D), median PE (-0.26 D), and median absolute PE (0.71) compared with those of the other formulas. Holladay 2 formula performed similarly to Barrett Universal II formula, and SRK/T formula had the greatest mean PE (-0.50 D) and SD (1.22 D). Barrett Universal II formula predictions were stable across all variables. CONCLUSIONS Barrett Universal II formula demonstrated similar or superior performance when compared with other formulas in this pediatric study. Holladay 2 formula performed similarly to Barrett Universal II formula, and SRK/T formula had the least reliable performance, across several key biometric characteristics. Although PEs can be highly variable in pediatric populations, this study supports Barrett Universal II formula as a reasonable and reliable option for lens power calculation in children, including those with extreme biometric measurements.
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Affiliation(s)
- Sarah E Eppley
- From the School of Medicine, University of California, San Francisco (Eppley and Campomanes); Francis I. Proctor Foundation, University of California, San Francisco (Arnold); Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt (Tadros); and Department of Ophthalmology, University of California, San Francisco (Arnold, Pasricha, and de Alba Campomanes)
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Shafik HM, Eldesouky MA, Tadros D. Lateral Rectus Muscle Tendon Elongation by an Auto Graft from the Resected Medial Rectus Muscle as a Monocular Surgery for Large-Angle Sensory Exotropia. Clin Ophthalmol 2020; 14:2135-2142. [PMID: 32801622 PMCID: PMC7386811 DOI: 10.2147/opth.s253628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/26/2020] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To evaluate using the resected medial rectus muscle for elongation of the lateral rectus tendon in monocular surgery for large-angle sensory exotropia. PATIENTS AND METHODS A prospective case series was carried out in Tanta University hospital from January 2017 to June 2018 including 16 patients with large-angle sensory exotropia ≥50PD. The near and distance angles of exotropia were measured; any restrictions in adduction or abduction were recorded and scaled from -4 to 0. Resection of the medial rectus muscle was done first; the resected segment was attached to the lateral rectus muscle after dissection by mattress sutures, and the muscle was recessed after elongation according to the preoperative distance angles. Successful motor alignment was considered if the angle measurement was within 10 PD of orthotropia at distance after 6 months. The stability of the alignment, any motility restrictions, and patient satisfaction were recorded at each follow-up visit until the 6th month. RESULTS The mean age of the study patients was 30.68±13.30 years. The best-corrected visual acuity of the exotropic eyes by logMAR was 1.2±0.3; the mean of the preoperative distance angle of deviation was -72.19 ±14.26 PD. The mean preoperative adduction and abduction restrictions were -1.19 ±1.52 and -1.13 ±1.09, respectively. There was significant improvement in the distance angle of deviation at the last follow-up after 6 months (p=0.001*). Also, there was improvement in both adduction and abduction restriction from the first to last follow-up. Thirteen patients (81.2%) were satisfied at the 6-month follow-up. CONCLUSION Elongation of the lateral rectus muscle by an autograft from the resected medial rectus muscle is an easy, effective procedure for large-angle sensory exotropia. Patients achieve good postoperative alignment with minimal restriction of ocular motility.
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Affiliation(s)
- Heba M Shafik
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Dina Tadros
- Department of Ophthalmology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Eschbach RS, Clevert DA, Hirner-Eppeneder H, Ingrisch M, Moser M, Schuster J, Tadros D, Schneider M, Kazmierczak PM, Reiser M, Cyran CC. Contrast-Enhanced Ultrasound with VEGFR2-Targeted Microbubbles for Monitoring Regorafenib Therapy Effects in Experimental Colorectal Adenocarcinomas in Rats with DCE-MRI and Immunohistochemical Validation. PLoS One 2017; 12:e0169323. [PMID: 28060884 PMCID: PMC5217974 DOI: 10.1371/journal.pone.0169323] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 12/15/2016] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES To investigate contrast-enhanced ultrasound (CEUS) with VEGFR2-targeted microbubbles for monitoring therapy effects of regorafenib on experimental colon carcinomas in rats with correlation to dynamic contrast-enhanced MRI (DCE-MRI) and immunohistochemistry. MATERIALS AND METHODS Human colorectal adenocarcinoma xenografts (HT-29) were implanted subcutaneously in n = 21 (n = 11 therapy group; n = 10 control group) female athymic nude rats (Hsd: RH-Foxn1rnu). Animals were imaged at baseline and after a one-week daily treatment with regorafenib or a placebo (10 mg/kg bodyweight), using CEUS with VEGFR2-targeted microbubbles and DCE-MRI. In CEUS tumor perfusion was assessed during an early vascular phase (wash-in area under the curve = WiAUC) and VEGFR2-specific binding during a late molecular phase (signal intensity after 8 (SI8min) and 10 minutes (SI10min)), using a conventional 15L8 linear transducer (transmit frequency 7 MHz, dynamic range 80 dB, depth 25 mm). In DCE-MRI functional parameters plasma flow (PF) and plasma volume (PV) were quantified. For validation purposes, CEUS parameters were correlated with DCE-MRI parameters and immunohistochemical VEGFR2, CD31, Ki-67 and TUNEL stainings. RESULTS CEUS perfusion parameter WiAUC decreased significantly (116,989 ± 77,048 a.u. to 30,076 ± 27,095a.u.; p = 0.005) under therapy with no significant changes (133,932 ± 65,960 a.u. to 84,316 ± 74,144 a.u.; p = 0.093) in the control group. In the therapy group, the amount of bound microbubbles in the late phase was significantly lower in the therapy than in the control group on day 7 (SI8min: 283 ± 191 vs. 802 ± 460 a.u.; p = 0.006); SI10min: 226 ± 149 vs. 645 ± 461 a.u.; p = 0.009). PF and PV decreased significantly (PF: 147 ± 58 mL/100 mL/min to 71 ± 15 mL/100 mL/min; p = 0.003; PV: 13 ± 3% to 9 ± 4%; p = 0.040) in the therapy group. Immunohistochemistry revealed significantly fewer VEGFR2 (7.2 ± 1.8 vs. 17.8 ± 4.6; p < 0.001), CD31 (8.1 ± 3.0 vs. 20.8 ± 5.7; p < 0.001) and Ki-67 (318.7 ± 94.0 vs. 468.0 ± 133.8; p = 0.004) and significantly more TUNEL (672.7 ± 194.0 vs. 357.6 ± 192.0; p = 0.003) positive cells in the therapy group. CEUS parameters showed significant (p < 0.05) correlations to DCE-MRI parameters and immunohistochemistry. CONCLUSIONS CEUS with VEGFR2-targeted microbubbles allowed for monitoring regorafenib functional and molecular therapy effects on experimental colorectal adenocarcinomas with a significant decline of CEUS and DCE-MRI perfusion parameters as well as a significant reduction of specifically bound microbubbles under therapy, consistent with a reduced expression of VEGFR2.
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Affiliation(s)
- Ralf Stefan Eschbach
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
- * E-mail:
| | - Dirk-Andre Clevert
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Heidrun Hirner-Eppeneder
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Michael Ingrisch
- Josef Lissner Laboratory for Biomedical Imaging, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Matthias Moser
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Jessica Schuster
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Dina Tadros
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Moritz Schneider
- Josef Lissner Laboratory for Biomedical Imaging, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Philipp Maximilian Kazmierczak
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Maximilian Reiser
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Clemens C. Cyran
- Laboratory for Experimental Radiology, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany
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Affiliation(s)
- M E Wilson
- Miles Center for Pediatric Ophthalmology, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, USA
| | - R H Trivedi
- Miles Center for Pediatric Ophthalmology, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, USA
| | - D Tadros
- Miles Center for Pediatric Ophthalmology, Storm Eye Institute, Department of Ophthalmology, Medical University of South Carolina, Charleston, SC, USA.,Ophthalmology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
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Tadros D, Trivedi RH, Wilson ME, Davidson JD. Ocular axial growth in pseudophakic eyes of patients operated for monocular infantile cataract: a comparison of operated and fellow eyes measured at surgery and 5 or more years later. J AAPOS 2016; 20:210-3. [PMID: 27109053 DOI: 10.1016/j.jaapos.2016.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 01/05/2016] [Accepted: 01/13/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To report the change in axial length (AL) over time and to compare the percentage of AL growth of pseudophakic eyes operated on for monocular cataract to that of the unoperated fellow eyes. METHODS The medical records of children operated on by a single surgeon for monocular congenital cataract before 7 months of age were retrospectively reviewed. Inclusion criteria were corneal diameter of ≥9 mm and availability of AL data for >5 years' follow-up after cataract surgery and >1 year after IOL implantation (in case of secondary IOL). Cataract with persistent fetal vasculature causing stretching of the ciliary processes, diagnosis of glaucoma or glaucoma suspect, and eyes with aphakia were excluded. Globe AL was measured by immersion ultrasound at surgery and 5 or more years later. RESULTS A total of 24 children were identified. Average age at cataract surgery was 2.6 ± 2.1 months. Age at last follow-up was 8.4 ± 2.8 years and duration of follow-up was 8.2 ± 2.8 years. 13 eyes received a primary IOL and 11 eyes received a secondary IOL. AL was significantly different between operative and fellow eyes, preoperatively (18.1 mm vs 18.7 mm, P = 0.004), and at the final follow-up (22.2 mm vs 23.0 mm, P = 0.03). Differences in AL growth of operated and fellow eyes were not significant (4.1 mm vs 4.4 mm, P = 0.4). Similarly, percentage of AL growth of operated and fellow eyes was also not significantly different (23% vs 23.6%, P = 0.7). CONCLUSIONS Eyes operated for monocular cataract have similar axial growth to that of fellow unoperated eyes, despite having a shorter AL at the time of surgery.
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Affiliation(s)
- Dina Tadros
- Storm Eye Institute, Medical University of South Carolina, Charleston; Ophthalmology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rupal H Trivedi
- Storm Eye Institute, Medical University of South Carolina, Charleston
| | - M Edward Wilson
- Storm Eye Institute, Medical University of South Carolina, Charleston.
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Eschbach R, Clevert D, Hirner-Eppeneder H, Kazmierczak P, Reiser M, Tadros D, Schneider M, Havla L, Schuster J, Moser M, Cyran C. Multiparametrischer CEUS mit VEGFR-2 spezifischen Microbubbles und DCE-MRT zum Monitoring der Effekte von Regorafenib auf Kolonkarzinom-Xenografts in Ratten mit immunhistochemischer Validierung. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tadros D, Trivedi RH, Wilson ME. Primary versus secondary IOL implantation following removal of infantile unilateral congenital cataract: outcomes after at least 5 years. J AAPOS 2016; 20:25-9. [PMID: 26917067 DOI: 10.1016/j.jaapos.2015.10.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 09/29/2015] [Accepted: 10/01/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE To report outcomes after at least 5 years' follow-up of consecutive patients at a single center undergoing unilateral congenital cataract surgery during infancy with primary intraocular lens (IOL) implantation at the time of surgery or undergoing secondary IOL implantation later in childhood. METHODS The medical records of pseudophakic children who received initial cataract surgery before 7 months of age were retrospectively reviewed. Children with acquired cataract, persistent fetal vasculature, congenital glaucoma, or follow-up of <5 years were excluded. RESULTS Mean age at time of cataract surgery was 2.7 months in the primary group (n = 13) and 1.9 months in the secondary group (n = 13). Mean age at IOL implantation in the latter group was 4.9 ± 2.2 years. Mean age at final follow-up was 10.7 ± 4.2 years in the primary group and 8.7 ± 3.0 years in the secondary group. Glaucoma surgery was performed in 2 primary group eyes and 1 secondary group eye; it was medically controlled in 2 additional eyes of the latter group. One secondary group eye was diagnosed as glaucoma suspect. Visual axis opacification required surgery in 5 primary group eyes and 2 secondary group eyes before IOL implantation. Unplanned IOL exchange or removal for high myopia was required in 3 primary group eyes and 1 secondary group eye. Strabismus surgery was performed in 3 primary group eyes and 7 secondary group eyes. Median visual acuity at final follow-up was 20/150 in both groups. Refraction at last follow-up was -2.9 ± 3.3 D in the primary and -1.8 ± 2.5 D in the secondary group. CONCLUSIONS Reoperations were common in both groups over long-term follow-up. Close monitoring for glaucoma is also needed in both groups.
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Affiliation(s)
- Dina Tadros
- Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina; Ophthalmology Department, Faculty of Medicine, Tanta University, Egypt
| | - Rupal H Trivedi
- Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina
| | - M Edward Wilson
- Storm Eye Institute, Medical University of South Carolina, Charleston, South Carolina.
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