TY - JOUR
T1 - A Novel Device for Suprachoroidal Drug Delivery to Retina
T2 - Evaluation in Nonhuman Primates
AU - Rotenstreich, Ygal
AU - Sher, Ifat
AU - Lawrence, Matthew
AU - Mangelus, Miriam
AU - Ingerman, Avner
AU - Barak, Yoreh
N1 - Publisher Copyright:
© 2023 The Authors.
PY - 2023/6
Y1 - 2023/6
N2 - Purpose: Evaluation of distribution and tolerance of suprachoroidal injection of indocyanine green (ICG) in nonhuman primates (NHPs) using a novel suprachoroidal (SC) delivery technology. Methods: Three live and three euthanized African green monkeys were injected with 150 or 200 μL ICG/eye into the SC space of both eyes, 2.5 mm posterior to the limbus in the inferior quadrant, utilizing a novel SC injector. Eyes were analyzed by imaging of scleral flatmounts. Live animals were observed for 24 hours for general health. Ophthalmic evaluation included slit-lamp biomicroscopy, tonometry, fundus imaging, confocal laser ophthalmoscopy, and spectral-domain optical coherence tomography (SD-OCT) before and at 10 minutes and 1, 3, and 24 hours post-injection. Results: SC dosing was successfully performed in all eyes. Infrared fundus imaging demonstrated ICG distribution throughout the posterior segment, reaching the macula within 24 hours post-injection. No inflammation, intravitreal penetration, SC blebs, retinal detachment, or hemorrhages were detected. No significant changes were observed in retinal thickness by SD-OCT (P = 0.267, ANOVA). A mild, statistically insignif-icant elevation in intraocular pressure was observed within 10 minutes post-injection (mean ± standard error: 7.28 ± 5.09 mmHg; P = 0.061) and was spontaneously resolved within the first hour after dosing. Conclusions: Suprachoroidal injection of 150 to 200 μL ICG dye was successfully performed and well tolerated in NHP eyes, with rapid distribution into the macular region and throughout the posterior pole. Translational Relevance: This novel SC drug delivery system may potentially provide safe and effective delivery of therapeutics to the posterior pole region in humans.
AB - Purpose: Evaluation of distribution and tolerance of suprachoroidal injection of indocyanine green (ICG) in nonhuman primates (NHPs) using a novel suprachoroidal (SC) delivery technology. Methods: Three live and three euthanized African green monkeys were injected with 150 or 200 μL ICG/eye into the SC space of both eyes, 2.5 mm posterior to the limbus in the inferior quadrant, utilizing a novel SC injector. Eyes were analyzed by imaging of scleral flatmounts. Live animals were observed for 24 hours for general health. Ophthalmic evaluation included slit-lamp biomicroscopy, tonometry, fundus imaging, confocal laser ophthalmoscopy, and spectral-domain optical coherence tomography (SD-OCT) before and at 10 minutes and 1, 3, and 24 hours post-injection. Results: SC dosing was successfully performed in all eyes. Infrared fundus imaging demonstrated ICG distribution throughout the posterior segment, reaching the macula within 24 hours post-injection. No inflammation, intravitreal penetration, SC blebs, retinal detachment, or hemorrhages were detected. No significant changes were observed in retinal thickness by SD-OCT (P = 0.267, ANOVA). A mild, statistically insignif-icant elevation in intraocular pressure was observed within 10 minutes post-injection (mean ± standard error: 7.28 ± 5.09 mmHg; P = 0.061) and was spontaneously resolved within the first hour after dosing. Conclusions: Suprachoroidal injection of 150 to 200 μL ICG dye was successfully performed and well tolerated in NHP eyes, with rapid distribution into the macular region and throughout the posterior pole. Translational Relevance: This novel SC drug delivery system may potentially provide safe and effective delivery of therapeutics to the posterior pole region in humans.
KW - drug delivery
KW - nonhuman primates
KW - retina
KW - suprachoroidal injection
UR - http://www.scopus.com/inward/record.url?scp=85163202575&partnerID=8YFLogxK
U2 - 10.1167/tvst.12.6.3
DO - 10.1167/tvst.12.6.3
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
C2 - 37289173
AN - SCOPUS:85163202575
SN - 2164-2591
VL - 12
JO - Translational Vision Science and Technology
JF - Translational Vision Science and Technology
IS - 6
M1 - 3
ER -