glaucoma/tyrosine

Lipoic acid effects on tyrosine metabolism and ocular hydrodynamics were examined in patients with primary open-angle glaucoma. Glaucoma patients not administered the drug and patients with ocular hypertension made up two reference groups. In the majority of glaucoma patients administration of

Retinal ganglion cell (RGC) degeneration is irreversible in glaucoma and tyrosine kinase receptor B (TrkB)-associated signaling pathways have been implicated in the process. In this study, we attempted to examine whether imipramine, a tricyclic antidepressant, may protect hydrogen peroxide

The PGF2alpha derivative, latanoprost, is a recent anti-glaucoma drug that has been reported to induce a discrete incidence of increased iris pigmentation in men. The present experiments were made in order to study whether this phenomenon could be influenced by the tyrosinase inhibitor,

The trabecular meshwork (TM) of the eye is responsible for maintaining physiological intraocular pressure (IOP). Dysfunction of this tissue results in elevated IOP, subsequent optic nerve damage and glaucoma, the world's leading cause of irreversible blindness. IOP regulation by delivering candidate

Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness. Magnetic resonance imaging (MRI) studies report an association between POAG and nonvisual pathway alterations. Locus coeruleus (LC) is a major source of norepinephrine released in the brain, and norepinephrine can

We investigated the effects of the protein tyrosine kinase inhibitors, genistein, tyrphostin 47, and herbimycin on prostaglandin F2alpha- and carbachol-induced inositol-1,4,5-trisphosphate (IP3) production, [Ca2+]i mobilization and contraction in cat iris sphincter smooth muscle. Prostaglandin

The vascular supply of the optic nerve has been studied with different methods including corrosion casts both in humans and in other mammals. In man, primates and some other mammals, such as the rat, a distinct central retinal artery accompanies the optic nerve, and runs through the lamina cribosa

Ocular ischemia resulting from perfusion disturbances may play a major role in initiation of glaucoma. Possibly secondary to ischemia autoimmunogenic events are activated in glaucoma patients with increased prevalence of systemic autoimmune diseases. The determination of potential molecular markers

21 amino acids have been determined in aqueous humor obtained during microsurgical intraocular procedures in 30 patients with senile cataract and 27 patients with primary open-angle glaucoma. All individual amino acids showed higher levels in the glaucomas than in the cataracts: this is valid at 2p

OBJECTIVE To investigate the presence and activity of protein phosphatase-2A (PPase2A), protein phosphatase-2C (PPase2C), and protein tyrosine phosphatases (PTPs) in the human aqueous humor (AH) of patients with primary open-angle glaucoma (POAG) and cataract and to study the correlation between

Glaucoma is a neurodegenerative disease of the eye and it is one of the major causes of blindness. Glaucoma is usually associated with elevated intraocular pressure (IOP) and the current therapy focuses on reduction of IOP. However, neuroprotective strategies could also be beneficial for treatment

OBJECTIVE Neurotrophin-4 protein (NT-4) plays a role in the protection of retinal ganglion cells by activating tyrosine kinase B (TrkB) receptors. A recent study identified mutations within the neurotrophin-4 (NTF4) gene to account for 1.7% of primary open-angle glaucoma (POAG) in Europeans. The aim

Glaucoma is characterized by the loss of retinal ganglion cells (RGCs) and optic nerve fibres. Previous studies noted fewer RGCs after immunization with ocular antigens at 28 days. It is known that changes in extracellular matrix (ECM) components conduct retina and optic nerve degeneration. Here, we

We have compared the distribution of tyrosine-hydroxylase immunoreactive (TH-I) somata in the retina of two strains of japanese quails, one normally pigmented and one hypopigmented mutant which develops a glaucoma, three months after their hatching. TH-I cells were observed among amacrine and

OBJECTIVE To examine the possible correlation between a dysfunction of the daily rhythm of retinal dopamine (DA) and the development of a glaucoma-like disorder in an animal model, the al mutant quail (Coturnix coturnix japonica). METHODS The morphology and density of DA-containing cells labeled