RT Journal
A1 Sossi N, Anderson DR
T1 Blockage of axonal transport in optic nerve induced by elevation of intraocular pressure: Effect of arterial hypertension induced by angiotensin i
JF Archives of Ophthalmology
JO Archives of Ophthalmology
YR 1983
FD January 1
VO 101
IS 1
SP 94
OP 97
DO 10.1001/archopht.1983.01040010096017
UL http://dx.doi.org/10.1001/archopht.1983.01040010096017
AB • Previous studies have shown that elevation of intraocular pressure blocks rapid axonal transport at the lamina cribrosa of the optic nerve. In this study, IOP-induced blockage of axonal transport was greater in cats with elevation of BP induced by angiotensin I than in control animals with normal BP. The fact that cardiovascular factors influenced IOPinduced blockage of axonal transport suggests that it is due to ischemia; if the blockage were a direct mechanical effect of the IOP on the axons, it should be unaffected by BP. The data also suggest that the vasoconstrictive properties of angiotensin I reduced the ability of the vasculature of the optic nerve head to autoregulate when challenged by elevation of IOP.