TY - JOUR
T1 - The molecular basis of neurotrophic keratitis
AU - Cavanagh, Harrison D
AU - Colley, A. M.
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1989/5
Y1 - 1989/5
N2 - Abstract Endogenous proliferation of corneal epithelial cells is regulated by a bidirectional control process characterized by an adrenergic, cAMP‐dependent ‘off’, and a cholinergic, muscarinic cGMP‐dependent ‘on’ response. The adrenergic receptor(s) are located in the plasma membrane (microsomal fraction), whereas the novel feature of the system is a cholinergic receptor specific for acetylcholine (ACH) located in the nuclear membrane. Exogenous substances which raise intracellular cAMP levels such as isoproterenol or PGE1, shut off epithelial mitosis; and, carbamylcholine or ACH raise intranuclear cGMP levels and increase mitosis by specific, regulatory stimulation of RNA‐polymerase II activity. We believe that this regulatory system explains the transitory mitotic suppression induced by superficial corneal wounding (interruption of adrenergic fibres, ‘chalone‐effect’); and the marked, permanent depression of epithelial mitosis associated with decreased intracellular ACH levels which are produced by total corneal denervation, and which results in neurotrophic keratitis. 1989 Institution Acta Ophthalmologica Scandinavica
AB - Abstract Endogenous proliferation of corneal epithelial cells is regulated by a bidirectional control process characterized by an adrenergic, cAMP‐dependent ‘off’, and a cholinergic, muscarinic cGMP‐dependent ‘on’ response. The adrenergic receptor(s) are located in the plasma membrane (microsomal fraction), whereas the novel feature of the system is a cholinergic receptor specific for acetylcholine (ACH) located in the nuclear membrane. Exogenous substances which raise intracellular cAMP levels such as isoproterenol or PGE1, shut off epithelial mitosis; and, carbamylcholine or ACH raise intranuclear cGMP levels and increase mitosis by specific, regulatory stimulation of RNA‐polymerase II activity. We believe that this regulatory system explains the transitory mitotic suppression induced by superficial corneal wounding (interruption of adrenergic fibres, ‘chalone‐effect’); and the marked, permanent depression of epithelial mitosis associated with decreased intracellular ACH levels which are produced by total corneal denervation, and which results in neurotrophic keratitis. 1989 Institution Acta Ophthalmologica Scandinavica
KW - cholinergic nerves
KW - cornea
KW - cyclic nucleotides
KW - epithelium
KW - mitotic regulation
KW - neurotrophic keratitis
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U2 - 10.1111/j.1755-3768.1989.tb07103.x
DO - 10.1111/j.1755-3768.1989.tb07103.x
M3 - Article
C2 - 2554641
AN - SCOPUS:0024350625
VL - 67
SP - 115
EP - 134
JO - Acta Ophthalmologica
JF - Acta Ophthalmologica
SN - 1755-375X
IS - 192 S
ER -