Protective Effect of Pemafibrate Treatment against Diabetic Retinopathy in Spontaneously Diabetic Torii Fatty Rats

Diabetic retinopathy (DR) can cause visual impairment and blindness, and the increasing global prevalence of diabetes underscores the need for effective therapies to prevent and treat DR. Therefore, this study aimed to evaluate the protective effect of pemafibrate treatment against DR, using a Spont...

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Published inBiological & pharmaceutical bulletin Vol. 47; no. 3; pp. 713 - 722
Main Authors Tanaka, Yoshiaki, Takagi, Rina, Mitou, Shingen, Shimmura, Machiko, Hasegawa, Tetsuya, Amarume, Jota, Shinohara, Masami, Kageyama, Yasushi, Sasase, Tomohiko, Ohta, Takeshi, Muramatsu, Shin-ichi, Kakehashi, Akihiro, Kaburaki, Toshikatsu
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Published Japan The Pharmaceutical Society of Japan 27.03.2024
Japan Science and Technology Agency
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Abstract Diabetic retinopathy (DR) can cause visual impairment and blindness, and the increasing global prevalence of diabetes underscores the need for effective therapies to prevent and treat DR. Therefore, this study aimed to evaluate the protective effect of pemafibrate treatment against DR, using a Spontaneously Diabetic Torii (SDT) fatty rat model of obese type 2 diabetes. SDT fatty rats were fed either a diet supplemented with pemafibrate (0.3 mg/kg/d) for 16 weeks, starting at 8 weeks of age (Pf SDT fatty: study group), or normal chow (SDT fatty: controls). Normal chow was provided to Sprague–Dawley (SD) rats (SD: normal controls). Electroretinography (ERG) was performed at 8 and 24 weeks of age to evaluate the retinal neural function. After sacrifice, retinal thickness, number of retinal folds, and choroidal thickness were evaluated, and immunostaining was performed for aquaporin-4 (AQP4). No significant differences were noted in food consumption, body weight, or blood glucose level after pemafibrate administration. Triglyceride levels were reduced, and high-density lipoprotein cholesterol levels were increased. Extension of oscillatory potential (OP)1 and OP3 waves on ERG was suppressed in the Pf SDT fatty group. Retinal thickness at 1500 microns from the optic disc improved in the Pf SDT fatty group. No significant improvements were noted in choroidal thickness or number of retinal folds. Quantitative analyses showed that AQP4-positive regions in the retinas were significantly larger in the Pf SDT fatty group than in the SDT fatty group. The findings suggest that pemafibrate treatment can exert protective effects against DR.
AbstractList Diabetic retinopathy (DR) can cause visual impairment and blindness, and the increasing global prevalence of diabetes underscores the need for effective therapies to prevent and treat DR. Therefore, this study aimed to evaluate the protective effect of pemafibrate treatment against DR, using a Spontaneously Diabetic Torii (SDT) fatty rat model of obese type 2 diabetes. SDT fatty rats were fed either a diet supplemented with pemafibrate (0.3 mg/kg/d) for 16 weeks, starting at 8 weeks of age (Pf SDT fatty: study group), or normal chow (SDT fatty: controls). Normal chow was provided to Sprague–Dawley (SD) rats (SD: normal controls). Electroretinography (ERG) was performed at 8 and 24 weeks of age to evaluate the retinal neural function. After sacrifice, retinal thickness, number of retinal folds, and choroidal thickness were evaluated, and immunostaining was performed for aquaporin-4 (AQP4). No significant differences were noted in food consumption, body weight, or blood glucose level after pemafibrate administration. Triglyceride levels were reduced, and high-density lipoprotein cholesterol levels were increased. Extension of oscillatory potential (OP)1 and OP3 waves on ERG was suppressed in the Pf SDT fatty group. Retinal thickness at 1500 microns from the optic disc improved in the Pf SDT fatty group. No significant improvements were noted in choroidal thickness or number of retinal folds. Quantitative analyses showed that AQP4-positive regions in the retinas were significantly larger in the Pf SDT fatty group than in the SDT fatty group. The findings suggest that pemafibrate treatment can exert protective effects against DR.
ArticleNumber b23-00872
Author Tanaka, Yoshiaki
Kageyama, Yasushi
Hasegawa, Tetsuya
Mitou, Shingen
Shimmura, Machiko
Sasase, Tomohiko
Amarume, Jota
Ohta, Takeshi
Muramatsu, Shin-ichi
Kakehashi, Akihiro
Takagi, Rina
Shinohara, Masami
Kaburaki, Toshikatsu
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  fullname: Mitou, Shingen
  organization: Department of Ophthalmology, Jichi Medical University, Saitama Medical Center
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  fullname: Shimmura, Machiko
  organization: Department of Ophthalmology, Jichi Medical University, Saitama Medical Center
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  fullname: Hasegawa, Tetsuya
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  fullname: Kaburaki, Toshikatsu
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diabetic retinopathy
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Snippet Diabetic retinopathy (DR) can cause visual impairment and blindness, and the increasing global prevalence of diabetes underscores the need for effective...
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SubjectTerms Animals
Aquaporin 4
Benzoxazoles
Blood levels
Body weight
Butyrates
Cholesterol
Diabetes
Diabetes mellitus (non-insulin dependent)
Diabetes Mellitus, Type 2
Diabetic retinopathy
Diabetic Retinopathy - drug therapy
Diabetic Retinopathy - prevention & control
Disease Models, Animal
Electroretinograms
Food consumption
High density lipoprotein
pemafibrate
Rats
Rats, Sprague-Dawley
Retina
Retinopathy
Spontaneously Diabetic Torii fatty rat model
Title Protective Effect of Pemafibrate Treatment against Diabetic Retinopathy in Spontaneously Diabetic Torii Fatty Rats
URI https://www.jstage.jst.go.jp/article/bpb/47/3/47_b23-00872/_article/-char/en
https://www.ncbi.nlm.nih.gov/pubmed/38432946
https://www.proquest.com/docview/3038261314/abstract/
https://search.proquest.com/docview/2937336303
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