ObjectiveTo analyze the protein expression changes in the retina of non-arteritic anterior ischemic optic neuropathy (NAION) in rats.MethodsThe rat NAION (rNAION) model was established by Rose Bengal and laser. Twenty Sprague-Dawley rats were randomly divided into 4 groups, the normal control group, the laser control group, the RB injection control group, and the rNAION model group, with 5 rats in each group. The right eye was used as the experimental eye. The retina was dissected at the third day after modeling. Enzyme digestion method was used for sample preparation and data collection was performed in a non-dependent collection mode. The data were quantitatively analyzed by SWATH quantitative mass spectrometry, searching for differential proteins and performing function and pathway analysis.ResultsCompared with the other three control groups, a total of 184 differential proteins were detected in the rNAION group (expression fold greater than 1.5 times and P＜0.05), including 99 up-regulated proteins and 85 down-regulated proteins. The expressions of glial fibrillary acidic protein, guanine nucleotide binding protein 4, laminin 1, 14-3-3γ protein YWHAG were increased. Whereas the expressions of Leucine-rich glioma-inactivated protein 1, secretory carrier-associated membrane protein 5, and Clathrin coat assembly protein AP180 were decreased. The differential proteins are mainly involved in biological processes such as nerve growth, energy metabolism, vesicle-mediated transport, the regulation of synaptic plasticity, apoptosis and inflammation. Pathway enrichment analysis showed that PI3K-Akt signaling pathway and complement and thrombin reaction pathway was related to the disease.ConclusionThe protein expressions of energy metabolism, nerve growth, synaptic vesicle transport and PI3K-Akt signaling pathway can regulate the neuronal regeneration and apoptosis in NAION.
Objective To culture astrocytes of human optic nerve and establish the cell lines for further study of healing process after optic nerve trauma. Methods Astrocytes of infantile optic nerve were cultured by tissue inoculation or tissue digestion with 0.25 % trypsin and 0.06% EDTA. The second and fourth passage cells were stained with HE and anti-GFAP, S-100 protein, vimentin, and CD34 antibodies. Results The trypsinized astrocytes of infantile optic nerver eached confluence in 7 days. The cultured cells were in polygonal shape with processes and the cytoplasm was abundant. These cells were positive in GFAP, S-100 protein and vimentin staining, and negative in CD34 staining. Conclusions Astrocytes of human optic nerve can be successfully cultured by trypsinization rather than tissue inoculation. (Chin J Ocul Fundus Dis, 2001,17:144-146)
Objective To investigate the characteristics and possibility of using an image analyzer-aided method to count axotomized retinal ganglion cells (RGCs). Methods The left optic nerves of 18 rats were transected intraorbitally and a piece of gelform soaked in 5% fluorogold was applied to the ocular stump to retrogradely label the surviving RGCs. All animals were executed 2, 7 or 14 d ays after the operation (n=6 for each time point), respectively. The left retinae were removed, post-fixed and whole-mounted on the slides. The numbers of labeled RGCs were counted using both the conventional sampling method and image analysis, and compared statistically between the two methods.Results The number of surviving RGCs decreased sharply［(12 0663±9 089), (59 285±17 071) and (17 802±19 8 4) cells/mm2 for image analyzer-aided method, and (118 237±7 898), (57 648±14 533) and (18 070±1 461) cells/mm2 for conventional sampling method］when the survival time increased from 2 to 7 and 14 days. No significant difference was detected between the two groups at any corresponding time points.Conclusion The image analyzer-aided method is convenient, objective and reproducible, which can be used in the studies where counting RGCs is needed. (Chin J Ocul Fundus Dis，2003，19：333-404)
Objective To observe the clinical manifestations and the effect factors of thyroid-associated ophthalmopath (TAO) with optic neuropathy. Methods The clinical data of 62 cases (120 eyes) of TAO with optic neuropathy diagnosed in 1994-2001 were retrospectively analyzed. Results The incidence of TAO with optic neuropathy was 18.3% in all the simultaneous TAO inpatients, and was more frequently found in the male than in the female ones. The incidence of TAO with optic neuropathy was correlated with orbitono-increase, ocular myopathy, hypertension, hyperlipemia, diabetes, and cardiopathy (P＜0.0000), but not with exophthalmos, intraocular pressure, and the disease course of TAO (Pgt;0.05). In 62 patients with the methylprednisolone pulse therapy, the visual acuity improved in 33 (29.0%), improved while the treatment but decreased after stop treating in 29 (24.2%), and no changes in 58 (46.8%). In 63 eyes undergone orbital decompression with methylprednisolone pulse therapy, 59 (93.7%) had better visual acuity. Conclusion The incidence of TAO with optic neuropathy was correlated with orbitono-increase, ocular myopathy, hypertension, hyperlipemia, diabetes, and cardiopathy. Met hylprednisolone pulse therapy and orbital decompression are the effective measures for TAO with optic neuropathy. (Chin J Ocul Fundus Dis，2004，20：142-144)
Objective To evaluate the influence of the location of retinal vessel trunk on neuroretinal rim width of inferior and superior sectors of optic disc, and explore its role in the diagnosis of glaucomatous optic nerve lesion. Methods The photographs of ocular fundus from 459 patients with clear location of retinal vessel trunk, including large disc in 131, medium disc in 145, horizontally oval disc in 75, and small disc in 108 were evaluated. Independent-sample t test was used to compare the difference of the superior and inferior rim widths between the higher-vessel group and the lower-vessel group, and to compare the difference of superior and inferior vessel distances between the narrow-superior-rim-width group and the narrow inferior-rim-width group. Results In most of the patients, or the ones with large and small disc, the ratio of superior rim width to summation of superior and inferior rim widths in the higher-vessel group（0.467plusmn;0.051，0.445plusmn;0.040，0.508plusmn;0.056）were less than which in the lowervessel group（0.500plusmn;0.066，0.474plusmn;0.062，0.546plusmn;0.048）, and the differences were significant（P=0.000, 0.045, 0.018）; the ratio of superior vessel distance to summation of superior and inferior vessel distance in the narrow-superior-rim-width group（0.510plusmn;0.051，0.508plusmn;0.055，0.512plusmn;0.036）were less than which in the narrow-inferior-rim-width group（0.528plusmn;0.045，0.533plusmn;0.048，0.534plusmn;0.045）, and the differences were significant（P=0.000, 0.046, 0.022）. Conclusions The position of optic disc vessel trunk influences its superior and inferior rim width. The rim closer to vessel trunk position has narrower width than which comparatively far away from the position. In patients with large, medium, horizontally oval optic disc, glaucoma optic nerve lesion would be considered if the optic disc has the shape of narrower inferior rim, broader superior rim, and vessel location in the superior half of the disc. In the ones with small disc, the optic disc with the shape of narrower superior rim, broader inferior rim, and vessel location in the inferior half of the disc may suggest glaucoma optic nerve lesion. (Chin J Ocul Fundus Dis, 2007, 23: 118-121)
ObjectiveTo explore the clinical features, primary lesions and prognosis of optic nerve metastases.MethodsSeven patients (11 eyes) with optic nerve metastatic tumor diagnosed by the examinations of ophthalmology, laboratory and pathology in Chinese PLA General Hospital from April 2015 to September 2017 were included in this study. All patients underwent BCVA, flash VEP, OCT, orbital MRI, serum tumor marker, cerebral spinal fluid detection and PET-CT. Histopathological examination of primary or near superficial metastases was performed. The follow-up period was ranged from 16 to 44 months, with the mean of 23.0±10.9 months. The clinical characteristics, primary tumor, imaging features, treatment and clinical prognosis in the patients were analyzed.ResultsAmong 7 patients, there were 5 males and 2 females, with the mean age of 53.90±14.99 years; 3 patients with unilateral optic nerve involvement, 4 patients with bilateral optic nerve involvement; 5 patients (71.4%) first diagnosed in ophthalmology. Five patients (45.5%) were misdiagnosed as optic neuritis, optic disc edema in 6 eyes (54.5%). All of them appear loss of visual acuity, including 8 eyes (72.7%) with BCVA＜0.1, 2 eyes (18.2%) with BCVA 0.1-0.5, 1 eye (9.1%) with BCVA＞0.5. MRI results show that 1 patient with intraorbital segment, 1 patient with internal segment of optic canal, 4 patients with intracranial segment, 1 patient with intracranial segment and optic chiasma involved simultaneously, 4 patients involving surrounding tissue. There were 4 patients (57.1 %) with lung cancer, 2 patients (28.6%) with kidney cancer, 1 patient (14.3%) with gastric cance; 6 patients (85.7%) with metastasis from other sites, 2 patients with brain metastasis (1 patient with meningitis carcinomatosa). There were 2 patients (28.6%) with previous primary cancer surgery. After diagnosis, 1 patient received chemotherapy, 1 patient received radiotherapy, 5 patients gave up treatment. At the end of follow-up, 1 patient (1 eye) of chemotherapy with BCVA increased by 2 line; 1 patient (2 eyes) of radiotherapy with no change in BCVA; of the 5 patients who gave up treatment, 1 patient died of disease, 1 patient lost follow-up, and 3 patients (4 eyes) had no change in BCVA.ConclusionsWith atypically clinical manifestations, the optic nerve metastases easily misdiagnosed as optic neuritis, and with poor therapeutic effect. Primary lesions are mostly found in lung cancer.
Optic nerve glioma (ONG) is a rare central nervous system tumor that occurs in children and adolescents. It’s main pathological type is low-grade pilocytic astrocytoma. It is divided into sporadic ONG and neurofibromatosis type 1 (NF-1) related ONG. Due to the close relationship between ONG and the optic nerve, there is its particularity in diagnosis and treatment. The diagnosis of ONG mainly relies on medical history, symptoms and signs, as well as imaging examinations such as MRI and CT. ONG should be differentiated from optic nerve sheath meningioma, optic neuritis, optic nerve metastasis and other diseases. In recent years, newly discovered molecular targeted therapy and anti-vascular endothelial growth factor drugs are a powerful supplement to ONG. When chemotherapy is not sensitive or resistant, radiotherapy can be considered, but it is only recommended for patients over 7 years of age. Surgery can be considered when the patient’s visual impairment is severe and the appearance of the eye is significantly affected. In addition, due to the susceptibility of NF-1 patients to tumors, the chemotherapy regimen should take into account the risk of secondary leukemia caused by the drug, and the timing of radiotherapy should be after the age of 10. We look forward to further ONG clinical research, which will bring more references for future clinical work.
ObjectiveTo observe the early ultrastructural changes of the optic nerves after the brain impact injury.MethodsEighteen 15-week-old Wistar rats were used in the air-pressure brain impact injury examination. All of the rats underwent the procedures of right-parietal-bone fenestration after abdominal cavity anesthesia with 1% sodium pentolbarbital (45 mg/kg), and then they were divided randomly into 3 groups, i.e., mild injury group (8 rats) underwent with 7 kg of air pressure in distance of 11 cm; severe injury group (8 rats) with 7 kg of airpressure in distance of 8 cm; and control group (2 rats) underwent with the parietalbone fenestration but without impact injury.The ultrastructural changes of the optic nerves were observed 1, 6, 24, and 72 hours after the injury by electron microscopy.ResultsThe difference of ultrastructural changes of optic nerve was not obvious in wild injury group and the control group, and the lanthanum nitrate was only found in the blood vessels in optic nerve. The lanthanum nitrate entered the nerve stroma 1 hour after severe and increased as time goes on. Simultaneously, displayed dilatation of endoplasmic reticulum, cavitation and tumefaction of mitochondrion, vacuolation of nerve stroma, and vacuolation of some axis-cylinder were seen in the glial cells.ConclusionThe brain impact injury may cause ultrastructural changes of the optic nerve and increase of permeability of blood vessels. (Chin J Ocul Fundus Dis, 2005,21:41-43)
Objective To explore the role of activated macrophage in the repair of traumatic optic nerve injury in an animal model of incomplete traumatic optic nerve injury with lens damage.Methods One hundred and twelve healthy New Zealand big ear white rabbits were divided into two groups (experimental and control groups) randomly. According to the different time points (one, four, seven, ten, 14, 21 and 28 days), each group was further divided into seven subgroups, each subgroup had eight rabbits. Traumatic optic neuropathy and lens damage were induced in one eye of each rabbit by fluid percussion brain injury device (FPI); those eyes were the experimental group. The eyes of control group only had traumatic optic neuropathy. The functional and morphological changes of retina and optic nerve were evaluated by histopathology and flashvisual evoked potential (FVEP).Results FVEP P100 latency was (42.74plusmn; 5.83) ms, P100 amplitude was (7.98 plusmn; 2.15) mu;V before optic nerve injury was induced. One day after the injury, the P100latency increased and the P100amplitude reduced significantly. The P100 latency reached the longest at ten days after injury, and then recovered gradually. The P100 amplitude reached the lowest at seven days after injury, and then recovered gradually. The histopathological examination showed activated macrophages were not detected in the retina and optic nerve at day one after the injury, then they increased gradually and reached their peak (91.25plusmn;6.91) at day ten, and decreased after that, the difference was statistically significant (F=21.277, P=0.000); retinal ganglion cell axon regeneration began at day seven after the injury with an average of (6.38plusmn;1.85). The axons increased gradually and reached their peak (49.63plusmn;2.50) at day 28, and the changes were significant (F=7.711, P=0.000). Conclusions Incomplete optic nerve injury can recover gradually if there is lens damage at the same time. Activated macrophage may play an important role in this recovery process.
ObjectiveTo observe the features of the manifestations of fundus fluorescein angiography （FFA） in multiple sclerosis （MS） and their value in clinical diagnosis.MethodsThe clinical data of 42 patients (84 eyes) with MS diagnosed by magnetic resonance imaging (MRI) and examination of cerebrospinal fluid (CSF) were retrospectively analyzed. The clinical data included visual acuity, ocular fundus examined by direct ophthalmoscope after mydriasis, FFA, visual field, CSF，visual evoked potential (VEP) and MRI examination.ResultsIn 42 patients (84 eyes),the positive detectable rate of examination of direct ophthalmoscope, CSF, visual field, VEP, and MRI was 36.9%, 21.4%, 71.4%, and 83.3% respectively. Abnormal results of FFA were found in 44 eyes (52.38%), including papillitis in 4 eyes（4.76%）at the early stage with extended physiological scotoma and central scotoma; neuroretinitis in 7 eyes （8.33%）at the medium stage with central or para-central scotoma; optic atrophy in 33 eyes（39.29%） at the late stage with centripetal constriction and even tubular visual field. ConclusionThe main angiographic features of MS are papillitis, neuroretinitis and optic atrophy. The manifestations of FFA combined with the results of examination of CSF，visual field, VEP and MRI is helpful for comprehensive and exact diagnosis of MS.(Chin J Ocul Fundus Dis, 2005,21:300-302)