Retinal manifestations of ocular lymphoma (reticulum cell sarcoma).

Background: Diagnosis and treatment of ocular large cell lymphoma may lessen visual loss and prolong life. Although reports in the literature have described retinal infiltrates in eyes with large cell lymphoma, they have focused on the more prominent vitreous and subretinal pigment epithelial findings. Eyes with retinal infiltrates and hemorrhagic retinal necrosis are usually believed to harbor a microbial infection.

Fluorescence of blood-stained cornea.

Corneal blood staining represents deposition of hemoglobin and its breakdown products within the cornea. Pathologic examination of these corneas typically reveals degenerating endothelial cells and keratocytes. These degenerative changes have typically been attributed to the blunt trauma itself or to toxicity of the erythrocytic debris (a "localized hemosiderosis").

Benzodiazepine receptors in the eye.

Central and peripheral benzodiazepine receptors were localized in the rat, monkey, and human eye by in vitro autoradiography. Central benzodiazepine binding sites, visualized with 3H-R015-1788, were enriched in the inner plexiform layer in all three species. Binding sites also were present in the nerve fiber layer, the ganglion cell layer, and in portions of the inner nuclear layer.

Dissection of epiciliary tissue to treat chronic hypotony after surgery for retinal detachment with proliferative vitreoretinopathy.

Surgery was performed on nine eyes of nine consecutive patients with chronic postoperative hypotony after prior vitreous surgery for retinal detachment and proliferative vitreoretinopathy. The operation included lysis of adhesions between the iris and the ciliary processes and removal of lens remnants and other fibrocellular tissue covering and/or causing traction on the pars plicata. The preoperative intraocular pressure was less than or equal to 5 mm Hg in all eyes, and the final postoperative intraocular pressure was 8 to 20 mm Hg in five eyes, 6 mm Hg in one eye, 4 mm Hg in one eye, and 0 mm Hg in two eyes.

Epiretinal membrane contracture associated with macular prolapse.

We treated two patients with annular epiretinal membranes that produced unusual macular morphologic characteristics. Contracture of the membranes caused herniation of macular tissue through a hole in the center of the membrane. The membranes were removed surgically, and ultrastructural analysis disclosed cells with properties resembling myofibroblasts and apparent new vitreous collagen.

Anterograde transport of opioid receptors in rat vagus nerves and dorsal roots of spinal nerves: pharmacology and sensitivity to sodium and guanine nucleotides.

We have utilized the technique of in vitro autoradiography to ascertain that opioid receptors are transported in the rat vagus nerve and in the rat dorsal spinal root fibers. In the dorsal roots, opioid receptors accumulated on both sides of the ligatures. In the vagus nerve, a distal accumulation of binding sites was difficult to detect, however, proximal to the ligatures, vagal receptors accumulated in a linear fashion during the first 12 h of ligation.

The Rieger anomaly concomitant with multiple dental, craniofacial, and somatic midline anomalies and short stature.

An unusual, isolated case of the Rieger anomaly coincident with a multitude of dental, craniofacial, and systemic anomalies is described. Significant dental findings were severe enamel hypoplasia, conical and misshapen teeth, hypodontia, and impactions. Craniofacial disorders were underdevelopment of the maxilla, mandible, and anterior and posterior cranial bases, low-set ears, and a wide nasal bridge.

Autoradiographic distribution of forskolin and phorbol ester binding sites in the retina.

We have localized the distribution of [3H]forskolin and [3H]phorbol dibutyrate binding sites autoradiographically in the rat, monkey, and human retina. In the rat and monkey retina, forskolin binding was enriched in the inner plexiform layer, in the inner and outer segments of the photoreceptors, and in the retinal pigment epithelium. In the human retina, forskolin binding sites were uniformly distributed and higher in density.

Endolaser treatment of the ciliary body for severe glaucoma.

Endolaser photocoagulation of the ciliary body was used to treat 42 eyes with severe glaucoma that could not be managed successfully by medical therapy and conventional glaucoma surgery. Follow-up ranged from 6 to 36 months (mean, 13 months). The preoperative intraocular pressure (IOP) ranged from 13 to 76 mmHg (mean, 37 mmHg).

Endogenous adenosine and adenosine receptors localized to ganglion cells of the retina.

Using specific sensitive antisera against adenosine, we have immunocytochemically localized endogenous adenosine to specific layers of rat, guinea pig, monkey, and human retina. Highest adenosine immunoreactivity was observed in ganglion cells and their processes in the optic nerve fiber layer. Substantial staining was also found throughout the inner plexiform layer and in select cells in the inner nuclear layer.

Autoradiographic localization of high affinity GABA, benzodiazepine, dopaminergic, adrenergic and muscarinic cholinergic receptors in the rat, monkey and human retina.

High affinity gamma-aminobutyric acid, benzodiazepine, strychnine (glycine), dopamine, spirodecanone, alpha 1-adrenergic, alpha 2-adrenergic, beta-adrenergic and muscarinic cholinergic binding sites were localized by semiquantitative autoradiography in rat and, in some instances, in monkey and human retinae using [3H]muscimol, [3H]flunitrazepam, [3H]strychnine, [3H]spiperone, [3H]prazosin, [3H]para-aminoclonidine, [3H]dihydroalprenolol and [3H]quinuclidinyl benzylate, respectively. In nearly every case, the inner plexiform layer (IP) contained a high receptor density. The distribution of alpha 1 sites was unusual in that binding was concentrated in the outer plexiform layer (OP).

Axonal transport of alpha-bungarotoxin binding sites in rat sciatic nerve.

[125I]alpha-Bungarotoxin (alpha-BuTX) binding sites accumulate both proximal and distal to a ligature positioned around the sciatic nerve of rats. [125I]alpha-BuTX binding sites, localized using quantitative receptor autoradiography, were found to accumulate at nerve ligatures at a relatively constant rate which suggests that they undergo both anterograde and retrograde axonal transport. [125I]alpha-BuTX binding to sections of ligated sciatic nerve was saturable with apparent dissociation constants of 0.

Autoradiographic localization of (125I-Tyr4)bombesin-binding sites in rat brain.

The binding of (125I-Tyr4)bombesin to rat brain slices was investigated. Radiolabeled (Tyr4)bombesin bound with high affinity (Kd = 4 nM) to a single class of sites (Bmax = 130 fmol/mg of protein); the ratio of specific to nonspecific binding was 6/1. Also, pharmacology studies indicated that the C-terminal of bombesin was important for the high affinity binding activity.

Farber's disease. Light and electron microscopic study of the eye.

A 35-month-old girl had Farber's disease (disseminated lipogranulomatosis) manifested clinically by macular cherry-red spots. The pathologic changes consisted of intracellular inclusions of varying morphologic features and density. The most frequently encountered inclusion was 1.

Distribution of muscarinic cholinergic high and low affinity agonist binding sites: a light microscopic autoradiographic study.

The distribution of high vs. low affinity muscarinic agonist binding sites has been determined using quantitative techniques of receptor autoradiography. The low affinity agonist sites predominate in many regions of the forebrain including the cerebral cortex, striatum, hippocampus, amygdala and thalamus.

Posterior capsule opacification in pseudophakic eyes.

Posterior capsule opacification following extracapsular cataract extraction is a manifestation of proliferation of anterior lens epithelium onto the posterior capsule. In addition to Elschnig pearl formation, vision is decreased in two ways. Multiple layers of proliferated epithelium produce a frank opacity.

Axonal transport of beta-adrenergic receptors. Antero- and retrogradely transported receptors differ in agonist affinity and nucleotide sensitivity.

Beta-receptors were measured in longitudinal sections of ligated rat sciatic nerve by autoradiographic localization of 125I-labeled cyanopindolol binding sites. Receptors accumulated at the ligature, both proximally and distally, in a time-dependent fashion. Receptor transport also occurred in an isolated segment of nerve (i.

Amyotrophic lateral sclerosis: alterations in neurotransmitter receptors.

Loss of motor neurons is the primary pathological hallmark of amyotrophic lateral sclerosis. Drug and neurotransmitter receptors are neuronal markers and can be indicators of neuronal connectivity. Knowledge of alterations in receptors in amyotrophic lateral sclerosis should contribute to our understanding of normal spinal cord neurotransmitter systems as well as of the pathophysiology of amyotrophic lateral sclerosis.

Autoradiographic localization of cholecystokinin receptors in rodent brain.

Cholecystokinin (CCK) receptor binding sites have been localized by autoradiography in the guinea pig and rat central nervous system. [125I]CCK-triacontatriapeptide labeled the sites in brain slices with an observed association constant equal to 0.041 min-1 and a dissociation constant equal to 0.

Axonal transport of muscarinic cholinergic receptors in rat vagus nerve: high and low affinity agonist receptors move in opposite directions and differ in nucleotide sensitivity.

The presence and transport of muscarinic cholinergic binding sites have been detected in the rat vagus nerve. These binding sites accumulate both proximal and distal to ligatures in a time-dependent manner. The results of double ligature and colchicine experiments are compatible with the notion that the anterogradely transported binding sites move by fast transport.

Distribution of opiate receptors in the monkey brain: an autoradiographic study.

By employing both in vivo and in vitro labeling techniques, opiate receptors were labeled with tritiated diprenorphine in the monkey brain and localized by light microscopic autoradiography. Both methods of labeling gave similar results, allowing a description of discrete areas having opiate binding sites. High concentrations of opiate receptors were found in the substantia gelatinosa of the spinal cord, nucleus tractus solitarius, area postrema, lateral parabrachial nucleus, substantia grisea centralis, several nuclei of the thalamus and hypothalamus, substantia innominata and in the amygdala.