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Biomedical subjects

H Morr

Publications and source records attributed to H Morr.

At least 73 records · Page 4Linked to original sources
PubMed1979

Immunological release of histamine from human lung. I. Studies on the beta 2-sympathomimetic stimulator fenoterol.

Human lung tissue passively sensitized with anti-grass pollen IgE antibodies release histamine upon exposure to specific grass pollen antigen. Fenoterol, a beta 2-sympathomimetic stimulator drug, is shown to be a potent inhibitor of antigen-induced release of histamine. This inhibitory effect occurred with fenoterol concentrations of 2 x 10(-8) to 1 x 10(-7) M, and was determined by 67 and 95%, respectively. Thus, the beta 2-receptor stimulator fenoterol is a valuable drug for treating allergic bronchial asthma since it exhibits a combination of prophylactic and direct therapeutic properties.

Asthma↗
PubMed1979

Immunological release of histamine from human lung. II. Studies on acetylcholine and the anticholinergic agent ipratropium bromide.

The experiments reported in this work have been performed to measure the effects of acetylcholine and the anticholinergic agent ipratropium bromide on the antigen-induced release of histamine from sensitized human lung in vitro. Primarily, ipratropium bromide did not have any effect, even at higher concentrations. Acetylcholine at a concentration of 1 x 10(-7)M increased the antigen-induced release of histamine by approximately 41%. When the lung tissue was treated with ipratropium bromide before acetylcholine, the competitive inhibition of the cholinergic receptor almost completely abolished this acetylcholine-induced increase of histamine release. Therefore, in our opinion, anticholinergic agents are primarily useful in vagus-controlled chronic obstructive ventilatory disorders; they are of secondary importance in allergic bronchial asthma.

Acetylcholine↗