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Research ArticleMinireviews

Cytokines and Growth Factors as Predictors of Response to Medical Treatment in Diabetic Macular Edema

Sónia Torres-Costa, Maria Carolina Alves Valente, Fernando Falcão-Reis and Manuel Falcão
Journal of Pharmacology and Experimental Therapeutics June 2020, 373 (3) 445-452; DOI: https://doi.org/10.1124/jpet.119.262956
Sónia Torres-Costa
Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal (S.T.-C., F.F.-R., M.F.); Faculty of Medicine, University of Porto, Porto, Portugal (M.C.A.V.); and Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal (F.F.-R., M.F.)
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Maria Carolina Alves Valente
Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal (S.T.-C., F.F.-R., M.F.); Faculty of Medicine, University of Porto, Porto, Portugal (M.C.A.V.); and Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal (F.F.-R., M.F.)
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Fernando Falcão-Reis
Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal (S.T.-C., F.F.-R., M.F.); Faculty of Medicine, University of Porto, Porto, Portugal (M.C.A.V.); and Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal (F.F.-R., M.F.)
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Manuel Falcão
Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal (S.T.-C., F.F.-R., M.F.); Faculty of Medicine, University of Porto, Porto, Portugal (M.C.A.V.); and Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal (F.F.-R., M.F.)
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Abstract

Diabetic macular edema (DME) is the most common cause of visual loss in patients with diabetes. Antivascular endothelial growth factors (anti-VEGF) agents are first-line therapy for DME. Nevertheless, up to 60% of patients (depending on the anti-VEGF drug used) have an inadequate response to anti-VEGF treatment. Several cytokines are increased in aqueous humor of patients with DME. Differences in response to treatment may be related to baseline cytokine levels. Intravitreal corticosteroids may be used as an alternative to anti-VEGF agents. Steroids have a different pharmacological profile and act on different pathophysiologic mechanisms. Their effect on aqueous humor cytokines is different from the effect of anti-VEGF therapy. This review highlights the major cytokines involved in DME and evaluates whether baseline cytokine levels could be predictors of response to treatment in DME.

SIGNIFICANCE STATEMENT Antivascular endothelial growth factor (anti-VEGF) agents are efficient as diabetic macular edema (DME) treatment. However, in some cases, DME fails to respond to anti-VEGF intravitreal injections. Changes in cytokine levels after treatment supported the idea that other cytokines than VEGF are implicated in DME pathogenesis and could be predictors of response to anti-VEGF treatment or corticosteroids allowing targeted and individualized therapy guided by cytokine levels.

Footnotes

    • Received October 8, 2019.
    • Accepted March 30, 2020.
  • No financial support was received for this submission.

  • Conflict of interest: None of the authors has conflict of interest with this submission.

  • This study was presented in 19th EURETINA Congress, 5-September 8, 2019, Paris, France.

  • https://doi.org/10.1124/jpet.119.262956.

  • Copyright © 2020 by The American Society for Pharmacology and Experimental Therapeutics
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Journal of Pharmacology and Experimental Therapeutics: 373 (3)
Journal of Pharmacology and Experimental Therapeutics
Vol. 373, Issue 3
1 Jun 2020
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Research ArticleMinireviews

Molecular Predictors of Response to Treatment in DME

Sónia Torres-Costa, Maria Carolina Alves Valente, Fernando Falcão-Reis and Manuel Falcão
Journal of Pharmacology and Experimental Therapeutics June 1, 2020, 373 (3) 445-452; DOI: https://doi.org/10.1124/jpet.119.262956

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Research ArticleMinireviews

Molecular Predictors of Response to Treatment in DME

Sónia Torres-Costa, Maria Carolina Alves Valente, Fernando Falcão-Reis and Manuel Falcão
Journal of Pharmacology and Experimental Therapeutics June 1, 2020, 373 (3) 445-452; DOI: https://doi.org/10.1124/jpet.119.262956
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  • Article
    • Abstract
    • Introduction
    • Diabetic Macular Edema Pathophysiology
    • Molecular Mediators Associated with Diabetic Macular Edema
    • Levels of Cytokines in Diabetic Macular Edema
    • Cytokine and Growth Factor Level Variation in Response to Anti-VEGF and Corticosteroids Intravitreal Injections
    • Cytokines and Growth Factors as Predictors of Response to ANTI-VEGF or Corticosteroids Intravitreal Treatment
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