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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 206 (1978), S. 25-32 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Collagenolytic cathepsin, which can liberate soluble hydroxyproline-containing products from insoluble vitreous collagen with maximum activity at pH 3.5, was biochemically studied in uveal lysosomes of bovine eye. Collagen solubilization was proportional to both enzyme concentration and incubation time. When the enzyme was heated, no reaction was observed. Collagen solubilization by uveal lysosomal extract was almost unaffected by Ca2+ion, cysteine, β-mercaptoethanol, and ethylenediaminetetraacetic acid, but inhibited about one-third by pepstatin. The possible role of collagenolytic cathepsin in vitreous liquefaction was considered.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 206 (1978), S. 163-168 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der in vitro Abbau des unlöslichen Glaskörperkollagen durch kollagenolytisches Cathepsin wurde biochemisch untersucht. Seine Aktivität war im Rinderauge besonders in Uvea und in Netzhaut relativ hoch. Im Glaskörper wurden die höchsten Aktivitäten sowohl des Cathepsin B als auch des kollagenolytischen Cathepsins gefunden. Leupeptin und p-Chloromercuribenzoat inaktivierten beide Substanzen in den Ciliarkörperlysosomen. Pepstatin wirkte als Inhibitor des Cathepsin D, beeinflußte aber nicht die Wirksamkeit des Cathepsin B und des kollagenolytischen Cathepsins. Verteilung und Eigenschaften des kollagenolytischen Cathepsin scheinen im Rinderauge ähnlich zu sein wie die des Cathepsin B.
    Notes: Summary In vitro degradation of insoluble vitreous collagen by the action of collagenolytic cathepsin was studied biochemically. Among bovine ocular tissues, the uvea and the retina showed relatively high collagenolytic activity. The ciliary body revealed the highest specific activities of both cathepsin B and collagenolytic cathepsin. Leupeptin and p-chloromercuribenzoate inhibited both cathepsin B and collagenolytic cathepsin in the ciliary body lysosomes. Pepstatin inhibited cathepsin D, but did not affect cathepsin B and collagenolytic cathepsin. It is suggested that distribution and properties of collagenolytic cathepsin are similar to those of cathepsin B in the bovine eye.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 200 (1976), S. 13-20 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bericht über enzymatische Untersuchungen von subretinaler Flüssikeit (SRF) bei Patienten mit primär rhegmatogener Netzhautablösung unterschiedlicher Dauer. Der Proteingehalt in der SRF nahm mit der Dauer der Abhebung zu, ebenso die Aktivitäten der lysosomalen Enzyme (saure Phosphatase, β-Glucuronidase und Kathepsin D). Insbesondere fand sich in der SRF Kathepsin D, das im Serum nicht enthalten war. Die Aktivität eines nicht-lysosomalen Enzyms (Laktat-Dehydrogenase) war die gleiche wie im Serum. Da die lysosomalen Enzyme dafür bekannt sind, daß sie Zellen und Gewebe verändern, trägt die Analyse der Enzyme der SRF zum Verständnis der Pathologie der primär rhegmatogenen Netzhautablösung bei.
    Notes: Summary Samples of subretinal fluid (SRF) from patients with primary rhegmatogeneous retinal detachment of various duration were studied using standard enzymologic techniques. The protein content in SRF increased with the duration of detachment. The activities of lysosomal enzymes in SRF, which were acid phosphatase, β-glucuronidase, and cathepsin D, also increased with the duration of detachment. Especially cathepsin D, which was not detected in serum, was present in SRF. The activity of a nonlysosomal enzyme, i. e., lactic dehydrogenase, which was used as a marker of cell disruption and of serum transudation was the same as that of serum. Because lysosomal enzymes are known to be able to degrade cells and tissues, the enzymologic analysis of SRF contributes to our understanding of the pathology of primary rhegmatogeneous retinal detachment.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 210 (1979), S. 103-107 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cathepsin B and collagenolytic cathepsin activities were studied biochemically in human aqueous humor. The enzyme activities were found to be significantly high in the aqueous humor of the patients with Behçet's disease, but not detectable in those with senile cataract, retinoblastoma, and maxillar carcinoma. These data suggest that cathepsin B and collagenolytic cathepsin have a certain role in the inflammatory collagenolytic process of Behçet's disease.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Documenta ophthalmologica 90 (1995), S. 221-227 
    ISSN: 1573-2622
    Keywords: Cone electroretinogram ; Crystalline retinopathy ; Rod electroretinogram ; S-cone electroretinogram
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined cone and rod electroretinograms to ganzfeld stimuli in a patient with crystalline retinopathy. The 54-year-old man complained of night blindness, blurred vision, and metamorphopsia in both eyes. His visual acuity was 10/200 in the right eye and 10/20 in the left eye; his subjective dark-adaptation threshold was elevated 1 log unit, and he made one tritan error on the Farnsworth Panel D-15. Specular microscopic examinations revealed tiny crystalline deposits in the limbal cornea bilaterally. Ophthalmoscopically, crystalline deposits were found in the posterior fundi. His light-adapted cone electroretinograms to white stimuli were diminished (about 30% of those of normal controls), with normal implicit times. His darkadapted rod electroretinogram amplitudes were 10% of those of normal controls. The S-cone electroretinogram was not detectable to different spectral stimuli with strong white background, while the L-M-cone responses appeared normal in waveforms with reduced amplitude. These ERG results indicated that the patient's S-cone system is more highly impaired than the L-M-cone system, supporting the psychophysical evidence that the S-cone system is more vulnerable than other cone systems in retinal diseases.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 203 (1977), S. 139-144 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Samples of serum from patients with ocular manifestation of Behçet's disease of various types were analyzed using acid phosphatase and β-glucuronidase as lysosomal marker enzymes, in comparison to those from control patients with myopia, retinal detachment, and uveitis of unknown etiology. The lysosomal enzyme activities in Behçet's disease, especially in the attack phase, were found to be higher than those of the controls. In the sera of two patients with Behçet's disease, the activities in the attack phase were slightly higher than in the remission phase. It was suggested that the ocular symptoms in Behçet's disease might represent exacerbation better than other symptoms, in view of the high lysosomal enzym activities in the attack phase, as classified by ocular symptoms alone.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 229 (1991), S. 508-511 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined bright-flash electroretinograms obtained in two Japanese women with pulseless disease. One 48-year-old woman (case 1) who has had the disease for 17 years showed no oscillatory potentials. When she sat and tilted her head to the right, a- and b-wave amplitudes diminished in the left eye. A second 48-year-old woman (case 2) who has had the disease for 10 years also demonstrated absent oscillatory potentials. When she sat and raised her chin, a- and b-wave amplitudes diminished in both eyes. These amplitudes were normal when the patients were in a supine position.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 224 (1986), S. 384-387 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A quantitative study was carried out on the lysosomal enzyme activities of the bovine corneal endothelium-Descemet's membrane preparation. The corneal endothelium and Descemet's membrane were peeled off together. Cathepsin D was assayed using hemoglobin as substrate;N-acetyl-β-D-glucosaminidase,β-glucuronidase, acid phosphatase, and α-mannosidase were also examined usingp-nitrophenyl derivatives as substrate. The proportions ofN-acetyl-β-D-glucosaminidase, cathepsin D, and βglucuronidase of the Descemet's membrane-endothelium complex were particularly high: 11.5%, 12.6%, and 12.5% of the whole cornea, respectively. Corneal endothelial cells also showed high activities of acid phosphatase and α-mannosidase (3.8%, and 5.0% of the whole cornea, respectively), while the protein and DNA contents were 0.5% and 0.5% in the complex. Lysosomal enzyme activities in the complex were also compared with those in other ocular tissues and were determined by the same methods at the same time.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 231 (1993), S. 439-443 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Of 220 patients (250 eyes) who underwent extracapsular cataract extraction with implantation of a posterior chamber intraocular lens, 36 (45 eyes) with non-insulin-dependent diabetes mellitus had no retinopathy, simple, or preproliferative retinopathy. They were divided into group A patients who underwent diet therapy or were treated with oral agents and group B patients who were given insulin therapy. The 184 patients (205 eyes) without diabetes mellitus served as control (group C). Transient elevation of intraocular pressure and cystoid macular edema were observed more frequently in diabetic patients (groups A and B). Progressive retinopathy occurred more frequently in group B than in group A patients, and it correlated with increased levels of plasma glucose. Unilateral cataract surgery was performed on 27 diabetic patients. Nine (33%) operated eyes showed progressive retinopathy, while one (4%) fellow eye worsened. It is possible that both increased levels of plasma glucose and surgical procedures may participate in the progression of retinopathy.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 227 (1989), S. 209-211 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined three adult Japanese patients who had a history of decreased hepatic glucose-6-phosphatase activity. All three patients had increased bilateral subcutaneous (SC) fat in the lower eyelids and inverted eyelashes. One patient additionally showed retinal hemorrhages and microaneurysms in both fundi. The inverted eyelashes may have been related to type 1a glycogen storage disease.
    Type of Medium: Electronic Resource
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