P. Goldschmidt et al., EFFECTS OF NONSTEROIDAL ANTIALLERGIC EYEDROPS ON THE COMPLEMENT-MEDIATED HISTAMINE-RELEASE FROM HUMAN-CELLS, Ocular immunology and inflammation, 5(1), 1997, pp. 11-17
Leukocytes from ten allergic patients (five allergic to dust-mites and
five allergic to pollen) were treated with N-acetyl aspartyl glutamic
acid (NAAGA) 4.9%, disodium cromoglycate (DSCG) 2%, lodoxamide (LODO)
1 parts per thousand, and levocabastine (LEVO) 0.5 parts per thousand
(concentrations representing the pharmaceutical eyedrop preparations)
for to minutes. Degranulation was then induced with Complement (rHu(5
)Ca). Histamine was measured in the supernatant with ELISA. LODO and L
EVO were inactive in blocking histamine released from human cells, and
paradoxical unexpected effects were found with these two agents. They
both induced significant histamine release in almost 100 parts per th
ousand Of the samples. DSCG was able to block histamine release in sev
en patients out of nine (ranging between 5 and 34%) NAAGA was the most
active agent on human cells and was able to block basophil degranulat
ion in nine patients out of nine (inhibition ranging between 4 and 66%
of total histamine pool).