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Biomedical subjects

H A Zink

Publications and source records attributed to H A Zink.

9 recordsLinked to original sources
PubMed1975

In vitro corticosteroid: correlation response with primary open-angle glaucoma and ocular corticosteroid sensitivity.

The transformation of human peripheral blood lymphocytes can be inhibited by corticosteroid compounds. In an in vitro study of 100 patients with primary open-angle glaucoma and various degrees of ocular pressure responsiveness to corticosteroid testing, varying degrees of sensitivity to corticosteroid compounds existed systemically in the circulating lymphocyte. A high correlation exists between the level of corticosteroid sensitivity in the lymphocyte and in the eye. In vitro cellular systems may be useful in evaluating the molecular basis of the variability in corticosteroid response, and in understanding the pathogenesis of corticosteroid-induced ocular hypertension and primary open-angle glaucoma.

Depression, Chemical↗
PubMed1975

Comparison of in vitro corticosteroid response in pigmentary glaucoma and primary open-angle glaucoma.

We used an in vitro assay utilizing corticosteroids to inhibit transformation of peripheral blood lymphocytes to evaluate a group of 20 patients with pigmentary glaucoma. The pigmentary glaucoma patient group did not manifest the markedly increased cellular sensitivity to corticosteroids associated with primary open-angle glaucoma. If increased sensitivity to corticosteroids plays an essential role in the pathogenesis of primary open-angle glaucoma, then pigmentary glaucoma appears to be etiologically, as well as clinically, a separate entity.

Adult↗
PubMed1975

In vitro determination of relative corticosteroid potency.

The corticosteroid concentration required to inhibit phytohemagglutinin stimulated human lymphocyte transformation by 50% was determined for three corticosteroids. The relative potency of hydrocortisone, prednisolone and dexamethasone determined in 16 patients was 1.00, 2.43, and 24.7 respectively. This assay is proposed as an objective tool for comparison of relative corticosteroid potency in man.

Adrenal Cortex Hormones↗
PubMed1975

Modification by imidazoles of ocular inflammatory and pressure responses.

Imidazole, given intraperitoneally to rabbits, inhibited the prostaglandin E1-induced (PGE1) elevation of intraocular pressure. The maximum imidaz-le effect occurred at three to six hours after intraperitoneal infection. The prostaglandin E1-induced aqueous humor protein elevation was reduced markedly in the imidazole-pretreated rabbits. Intravenous administration of imidazole also was effective in reducing the intraocular pressure elevation produced by prostaglandin E1. Imidazole pretreatment by subconjunctival, subdermal, or topical routes had no such effect. Imidazole derivatives, 1-methylimidazole and 2-methylimidazole, given intraperitoneally, blocked the effect of PGE1 on intraocular pressure and aqueous humor protein. Imidazole pretreatment also inhibited the elevation of intraocular pressure produced by topical nitrogen mustard, 1 per cent.

Administration, Topical↗