A phase II randomized double-masked trial of pegaptanib, an anti-vascular endothelial growth factor aptamer, for diabetic macular edema

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Abstract

Objective: To evaluate the safety and efficacy of pegaptanib sodium injection (pegaptanib) in the treatment of diabetic macular edema (DME). Design: Randomized, double-masked, multicenter, dose-ranging, controlled trial. Participants: Individuals with a best-corrected visual acuity (VA) between 20/50 and 20/320 in the study eye and DME involving the center of the macula for whom the investigator judged photocoagulation could be safely withheld for 16 weeks. Intervention: Intravitreous pegaptanib (0.3 mg, 1 mg, 3 mg) or sham injections at study entry, week 6, and week 12 with additional injections and/or focal photocoagulation as needed for another 18 weeks. Final assessments were conducted at week 36. Main Outcome Measures: Best-corrected VA, central retinal thickness at the center point of the central subfield as assessed by optical coherence tomography measurement, and additional therapy with photocoagulation between weeks 12 and 36. Results: One hundred seventy-two patients appeared balanced for baseline demographic and ocular characteristics. Median VA was better at week 36 with 0.3 mg (20/50), as compared with sham (20/63) (P = 0.04). A larger proportion of those receiving 0.3 mg gained VAs of <10 letters (approximately 2 lines) (34% vs. 10%, P = 0.003) and <15 letters (18% vs. 7%, P = 0.12). Mean central retinal thickness decreased by 68 μm with 0.3 mg, versus an increase of 4 μm with sham (P = 0.02). Larger proportions of those receiving 0.3 mg had an absolute decrease of both <100 μm (42% vs. 16%, P = 0.02) and <75 μm (49% vs. 19%, P = 0.008). Photocoagulation was deemed necessary in fewer subjects in each pegaptanib arm (0.3 mg vs. sham, 25% vs. 48%; P = 0.04). All pegaptanib doses were well tolerated. Endophthalmitis occurred in 1 of 652 injections (0.15%/injection; i.e., 1/130 [0.8%] pegaptanib subjects) and was not associated with severe visual loss. Conclusions: In this phase II trial, subjects assigned to pegaptanib had better VA outcomes, were more likely to show reduction in central retinal thickness, and were deemed less likely to need additional therapy with photocoagulation at follow-up.

Original languageEnglish (US)
Pages (from-to)1747-1757
Number of pages11
JournalOphthalmology
Volume112
Issue number10
DOIs
StatePublished - Oct 2005
Externally publishedYes

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Macular Edema
Vascular Endothelial Growth Factor A
Light Coagulation
Visual Acuity
Injections
Endophthalmitis
Optical Coherence Tomography
pegaptanib
Therapeutics
Research Personnel
Demography
Outcome Assessment (Health Care)
Safety

ASJC Scopus subject areas

  • Ophthalmology

Cite this

@article{787db3fb761f42b2bf87f19dd315c1ab,
title = "A phase II randomized double-masked trial of pegaptanib, an anti-vascular endothelial growth factor aptamer, for diabetic macular edema",
abstract = "Objective: To evaluate the safety and efficacy of pegaptanib sodium injection (pegaptanib) in the treatment of diabetic macular edema (DME). Design: Randomized, double-masked, multicenter, dose-ranging, controlled trial. Participants: Individuals with a best-corrected visual acuity (VA) between 20/50 and 20/320 in the study eye and DME involving the center of the macula for whom the investigator judged photocoagulation could be safely withheld for 16 weeks. Intervention: Intravitreous pegaptanib (0.3 mg, 1 mg, 3 mg) or sham injections at study entry, week 6, and week 12 with additional injections and/or focal photocoagulation as needed for another 18 weeks. Final assessments were conducted at week 36. Main Outcome Measures: Best-corrected VA, central retinal thickness at the center point of the central subfield as assessed by optical coherence tomography measurement, and additional therapy with photocoagulation between weeks 12 and 36. Results: One hundred seventy-two patients appeared balanced for baseline demographic and ocular characteristics. Median VA was better at week 36 with 0.3 mg (20/50), as compared with sham (20/63) (P = 0.04). A larger proportion of those receiving 0.3 mg gained VAs of <10 letters (approximately 2 lines) (34{\%} vs. 10{\%}, P = 0.003) and <15 letters (18{\%} vs. 7{\%}, P = 0.12). Mean central retinal thickness decreased by 68 μm with 0.3 mg, versus an increase of 4 μm with sham (P = 0.02). Larger proportions of those receiving 0.3 mg had an absolute decrease of both <100 μm (42{\%} vs. 16{\%}, P = 0.02) and <75 μm (49{\%} vs. 19{\%}, P = 0.008). Photocoagulation was deemed necessary in fewer subjects in each pegaptanib arm (0.3 mg vs. sham, 25{\%} vs. 48{\%}; P = 0.04). All pegaptanib doses were well tolerated. Endophthalmitis occurred in 1 of 652 injections (0.15{\%}/injection; i.e., 1/130 [0.8{\%}] pegaptanib subjects) and was not associated with severe visual loss. Conclusions: In this phase II trial, subjects assigned to pegaptanib had better VA outcomes, were more likely to show reduction in central retinal thickness, and were deemed less likely to need additional therapy with photocoagulation at follow-up.",
author = "Barrett Katz",
year = "2005",
month = "10",
doi = "10.1016/j.ophtha.2005.06.007",
language = "English (US)",
volume = "112",
pages = "1747--1757",
journal = "Ophthalmology",
issn = "0161-6420",
publisher = "Elsevier Inc.",
number = "10",

}

TY - JOUR

T1 - A phase II randomized double-masked trial of pegaptanib, an anti-vascular endothelial growth factor aptamer, for diabetic macular edema

AU - Katz, Barrett

PY - 2005/10

Y1 - 2005/10

N2 - Objective: To evaluate the safety and efficacy of pegaptanib sodium injection (pegaptanib) in the treatment of diabetic macular edema (DME). Design: Randomized, double-masked, multicenter, dose-ranging, controlled trial. Participants: Individuals with a best-corrected visual acuity (VA) between 20/50 and 20/320 in the study eye and DME involving the center of the macula for whom the investigator judged photocoagulation could be safely withheld for 16 weeks. Intervention: Intravitreous pegaptanib (0.3 mg, 1 mg, 3 mg) or sham injections at study entry, week 6, and week 12 with additional injections and/or focal photocoagulation as needed for another 18 weeks. Final assessments were conducted at week 36. Main Outcome Measures: Best-corrected VA, central retinal thickness at the center point of the central subfield as assessed by optical coherence tomography measurement, and additional therapy with photocoagulation between weeks 12 and 36. Results: One hundred seventy-two patients appeared balanced for baseline demographic and ocular characteristics. Median VA was better at week 36 with 0.3 mg (20/50), as compared with sham (20/63) (P = 0.04). A larger proportion of those receiving 0.3 mg gained VAs of <10 letters (approximately 2 lines) (34% vs. 10%, P = 0.003) and <15 letters (18% vs. 7%, P = 0.12). Mean central retinal thickness decreased by 68 μm with 0.3 mg, versus an increase of 4 μm with sham (P = 0.02). Larger proportions of those receiving 0.3 mg had an absolute decrease of both <100 μm (42% vs. 16%, P = 0.02) and <75 μm (49% vs. 19%, P = 0.008). Photocoagulation was deemed necessary in fewer subjects in each pegaptanib arm (0.3 mg vs. sham, 25% vs. 48%; P = 0.04). All pegaptanib doses were well tolerated. Endophthalmitis occurred in 1 of 652 injections (0.15%/injection; i.e., 1/130 [0.8%] pegaptanib subjects) and was not associated with severe visual loss. Conclusions: In this phase II trial, subjects assigned to pegaptanib had better VA outcomes, were more likely to show reduction in central retinal thickness, and were deemed less likely to need additional therapy with photocoagulation at follow-up.

AB - Objective: To evaluate the safety and efficacy of pegaptanib sodium injection (pegaptanib) in the treatment of diabetic macular edema (DME). Design: Randomized, double-masked, multicenter, dose-ranging, controlled trial. Participants: Individuals with a best-corrected visual acuity (VA) between 20/50 and 20/320 in the study eye and DME involving the center of the macula for whom the investigator judged photocoagulation could be safely withheld for 16 weeks. Intervention: Intravitreous pegaptanib (0.3 mg, 1 mg, 3 mg) or sham injections at study entry, week 6, and week 12 with additional injections and/or focal photocoagulation as needed for another 18 weeks. Final assessments were conducted at week 36. Main Outcome Measures: Best-corrected VA, central retinal thickness at the center point of the central subfield as assessed by optical coherence tomography measurement, and additional therapy with photocoagulation between weeks 12 and 36. Results: One hundred seventy-two patients appeared balanced for baseline demographic and ocular characteristics. Median VA was better at week 36 with 0.3 mg (20/50), as compared with sham (20/63) (P = 0.04). A larger proportion of those receiving 0.3 mg gained VAs of <10 letters (approximately 2 lines) (34% vs. 10%, P = 0.003) and <15 letters (18% vs. 7%, P = 0.12). Mean central retinal thickness decreased by 68 μm with 0.3 mg, versus an increase of 4 μm with sham (P = 0.02). Larger proportions of those receiving 0.3 mg had an absolute decrease of both <100 μm (42% vs. 16%, P = 0.02) and <75 μm (49% vs. 19%, P = 0.008). Photocoagulation was deemed necessary in fewer subjects in each pegaptanib arm (0.3 mg vs. sham, 25% vs. 48%; P = 0.04). All pegaptanib doses were well tolerated. Endophthalmitis occurred in 1 of 652 injections (0.15%/injection; i.e., 1/130 [0.8%] pegaptanib subjects) and was not associated with severe visual loss. Conclusions: In this phase II trial, subjects assigned to pegaptanib had better VA outcomes, were more likely to show reduction in central retinal thickness, and were deemed less likely to need additional therapy with photocoagulation at follow-up.

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