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  • Title: Hypertonic KCI, NaCl and capsaicin intracamerally causes release of substance P-like immunoreactive material into the aqueous humor in rabbits.
    Author: Mandahl A, Brodin E, Bill A.
    Journal: Acta Physiol Scand; 1984 Apr; 120(4):579-84. PubMed ID: 6541421.
    Abstract:
    We have investigated release of substance P-like immunoreactivity (SPLI) into the anterior chamber of the rabbit eye evoked by stimuli which cause non-cholinergic miosis. In a recent study such miosis was reported to be blocked by the substance P analogue (D-Arg1, D-Pro2, D-Trp7,9, Leu11)-SP. Mechanical intracranial antidromic trigeminal nerve stimulation caused marked SPLI release presumably from primary sensory nerve endings in the anterior part of the eye. Intermittent stimulation for 20 min was not more effective than stimulation for 10 min. Intracameral injection of either 20 microliters 4.65 M KCI, 20 microliters 4.65 M NaCl or 100 micrograms capsaicin also caused SPLI release. Intracameral injection of 70 microliters 150 mM KCI, 28 micrograms prostaglandin E1 or 200 micrograms of compound 48/80 did not cause detectable SPLI release.
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