Cited by 136Retinal Diseases and TreatmentsAdvanced Glycation End Products researchAldose Reductase and Taurine

Effects of p38 MAPK Inhibition on Early Stages of Diabetic Retinopathy and Sensory Nerve Function

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Du, Yunpeng, Tang, Jie, Li, Guanyuan, Berti-Mattera, Liliana, Lee, Chieh Allen, Bartkowski, Darian, Gale, David, Monahan, Joe +3 more·2010·Investigative Opthalmology & Visual Science

Abstract

Purpose. p38 mitogen-activated protein kinase (MAPK) is known to play a regulatory role in inflammatory processes in disease. Inflammation has been linked also to the development of diabetic retinopathy in rodents. This study was conducted to evaluate the effect of a p38 MAPK inhibitor on the development of early stages of diabetic retinopathy in rats. Methods. Streptozotocin-diabetic rats were assigned to two groups-treated with the p38 MAPK inhibitor PHA666859 (Pfizer, New York, NY) and untreated-and compared with age-matched nondiabetic control animals. Results. At 2 months of diabetes, insulin-deficient diabetic control rats exhibited significant increases in retinal superoxide, nitric oxide (NO), cyclooxygenase (COX)-2, and leukostasis within retinal microvessels. All these abnormalities were significantly inhibited by the p38 MAPK inhibitor (25 mg/kgBW/d). At 10 months of diabetes, significant increases in the number of degenerate (acellular) capillaries and pericyte ghosts were measured in control diabetic rats versus those in nondiabetic control animals, and pharmacologic inhibition of p38 MAPK significantly inhibited all these abnormalities (all P < 0.05). This therapy also had beneficial effects outside the eye in diabetes, as evidenced by the inhibition of a diabetes-induced hypersensitivity of peripheral nerves to light touch (tactile allodynia). Conclusions. p38 MAPK plays an important role in diabetes-induced inflammation in the retina, and inhibition of p38 MAPK offers a novel therapeutic approach to inhibiting the development of early stages of diabetic retinopathy and other complications of diabetes.

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  • p38 activation plays a role in the long-term vascular pathology of diabetic retinopathy while its inhibition by PHA666859 in an STZ-induced diabetes rat model blocked the death of endothelial cells and pericytes and significantly inhibited the degeneration of retinal capillaries.

    “p38 activation also plays a role in the long-term vascular pathology of diabetic retinopathy while its inhibition by PHA666859 in an STZ-induced diabetes rat model blocked the death of endothelial cells and pericytes and significantly inhibited the degeneration of retinal capillaries [ 71 ].”

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Authors
Du, Y., Tang, J., Li, G., Berti-Mattera, L., Lee, C. A., Bartkowski, D., Gale, D., Monahan, J., Niesman, M. R., Alton, G., & Kern, T. S.
Affiliations
  • Case Western Reserve University (US)
  • Jilin University (CN)
  • From the Case Western Reserve University, Cleveland, Ohio;
  • Louis Stokes Cleveland VA Medical Center (US)
  • Pfizer (United States) (US)
Corresponding author
  • Du, Yunpeng
  • Tang, Jie
  • Li, Guanyuan
  • Lee, Chieh Allen
  • Bartkowski, Darian
  • Gale, David
  • Monahan, Joe
  • Niesman, Michael R.
  • Alton, Gordon
  • Kern, Timothy S.
Venue
Investigative Opthalmology & Visual Science
Published
2010-04-01
Volume
51
Issue
4
Pages
2158
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W2081939329
Cited by
136
References
54
Citations by year
2026: 9 · 2025: 6 · 2024: 6 · 2023: 10 · 2022: 5 · 2021: 6 · 2020: 11 · 2019: 8 · 2018: 5 · 2017: 13 · 2016: 9 · 2015: 12 · 2014: 6 · 2013: 14 · 2012: 6
FWCI
10.39
Type
journal article
Language
en
Open access
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Pfizer
  • Case Western Reserve University
  • National Institutes of Health (EY00300)
  • National Eye Institute (R01EY000300, EY00 300, R56EY000300, P30EY011373)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Advanced Glycation End Products research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Aldose Reductase and Taurine
Keywords
p38 MAPK, diabetic retinopathy, retinal inflammation, streptozotocin-induced diabetes, superoxide, nitric oxide, cyclooxygenase-2, leukostasis, retinal microvasculature, capillary degeneration, mechanical allodynia, diabetic peripheral neuropathy, diabetes complications
MeSH terms
Animals, Diabetes Mellitus, Experimental, Diabetic Retinopathy, Endothelium, Vascular, Enzyme Inhibitors, Hyperalgesia, Male, Nitric Oxide, Pyrazoles, Pyrimidines, Rats, Inbred Lew, Sensory Receptor Cells, Retinal Vessels, Superoxides, Touch, Blotting, Western, Leukostasis, Pericytes, p38 Mitogen-Activated Protein Kinases, Rats, Cyclooxygenase 2

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