PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats

Katsuaki Miki, Katsuhiko Yoshizawa, Norihisa Uehara, Takashi Yuri, Yoichiro Matsuoka, Airo Tsubura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background: There have been no previous studies of the effects of poly(ADP-ribose) polymerase (PARP) inhibitors on N-methyl-N-nitrosourea (MNU)-induced cataractogenesis in rats. Materials and Methods: A single intraperitoneal injection of 70 mg/kg MNU was administered to 15-day-old male and female Sprague-Dawley rats. In Experiment 1, rats were then subcutaneously injected with 1000 mg/kg nicotinamide, either once or 3 times at 1-week intervals. In Experiment 2, rats were subcutaneously injected once with 50 mg/kg 3-aminobenzamide. For comparison, the following age-matched controls were included: MNU-untreated nicotinamide-injected rats, MNU-untreated 3-aminobenzamide-injected rats, and MNU-untreated PARP-inhibitor-untreated rats. Rats were examined for lens opacity. At 28 days after MNU injection, 10 to 20 rats per group were sacrificed. In Experiment 1, at 3 days after MNU injection, 10 rats per group were sacrificed for apoptosis and cell proliferation detection. Results: MNU caused lens epithelial cell apoptosis in the germinative zone, as indicated by TUNEL staining. However, regardless of MNU treatment, lens epithelial cell proliferation was consistently seen in the germinative zone and sporadically seen in the central zone. At 28 days after MNU, mature cataracts were observed. Nicotinamide significantly accelerated lens opacity and cataractogenesis, as indicated by a cataract index. 3-Aminobenzamide significantly accelerated the development of lens opacity and tended to accelerate cataractogenesis. Conclusion: The PARP inhibitors nicotinamide and 3-aminobenzamide accelerated MNU-induced cataractogenesis.

Original languageEnglish
Pages (from-to)739-744
Number of pages6
JournalIn Vivo
Volume21
Issue number5
Publication statusPublished - Sep 1 2007

Fingerprint

Methylnitrosourea
Sprague Dawley Rats
Rats
Niacinamide
Cataract
Lenses
Opacity
Cell proliferation
Poly(ADP-ribose) Polymerase Inhibitors
Epithelial Cells
Cell Proliferation
Apoptosis
Injections
Experiments
In Situ Nick-End Labeling
Intraperitoneal Injections

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology

Cite this

Miki, K., Yoshizawa, K., Uehara, N., Yuri, T., Matsuoka, Y., & Tsubura, A. (2007). PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats. In Vivo, 21(5), 739-744.

PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats. / Miki, Katsuaki; Yoshizawa, Katsuhiko; Uehara, Norihisa; Yuri, Takashi; Matsuoka, Yoichiro; Tsubura, Airo.

In: In Vivo, Vol. 21, No. 5, 01.09.2007, p. 739-744.

Research output: Contribution to journalArticle

Miki, K, Yoshizawa, K, Uehara, N, Yuri, T, Matsuoka, Y & Tsubura, A 2007, 'PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats', In Vivo, vol. 21, no. 5, pp. 739-744.
Miki K, Yoshizawa K, Uehara N, Yuri T, Matsuoka Y, Tsubura A. PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats. In Vivo. 2007 Sep 1;21(5):739-744.
Miki, Katsuaki ; Yoshizawa, Katsuhiko ; Uehara, Norihisa ; Yuri, Takashi ; Matsuoka, Yoichiro ; Tsubura, Airo. / PARP inhibitors accelerate N-methyl-N-nitrosourea-induced cataractogenesis in Sprague-Dawley rats. In: In Vivo. 2007 ; Vol. 21, No. 5. pp. 739-744.
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abstract = "Background: There have been no previous studies of the effects of poly(ADP-ribose) polymerase (PARP) inhibitors on N-methyl-N-nitrosourea (MNU)-induced cataractogenesis in rats. Materials and Methods: A single intraperitoneal injection of 70 mg/kg MNU was administered to 15-day-old male and female Sprague-Dawley rats. In Experiment 1, rats were then subcutaneously injected with 1000 mg/kg nicotinamide, either once or 3 times at 1-week intervals. In Experiment 2, rats were subcutaneously injected once with 50 mg/kg 3-aminobenzamide. For comparison, the following age-matched controls were included: MNU-untreated nicotinamide-injected rats, MNU-untreated 3-aminobenzamide-injected rats, and MNU-untreated PARP-inhibitor-untreated rats. Rats were examined for lens opacity. At 28 days after MNU injection, 10 to 20 rats per group were sacrificed. In Experiment 1, at 3 days after MNU injection, 10 rats per group were sacrificed for apoptosis and cell proliferation detection. Results: MNU caused lens epithelial cell apoptosis in the germinative zone, as indicated by TUNEL staining. However, regardless of MNU treatment, lens epithelial cell proliferation was consistently seen in the germinative zone and sporadically seen in the central zone. At 28 days after MNU, mature cataracts were observed. Nicotinamide significantly accelerated lens opacity and cataractogenesis, as indicated by a cataract index. 3-Aminobenzamide significantly accelerated the development of lens opacity and tended to accelerate cataractogenesis. Conclusion: The PARP inhibitors nicotinamide and 3-aminobenzamide accelerated MNU-induced cataractogenesis.",
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AU - Yuri, Takashi

AU - Matsuoka, Yoichiro

AU - Tsubura, Airo

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N2 - Background: There have been no previous studies of the effects of poly(ADP-ribose) polymerase (PARP) inhibitors on N-methyl-N-nitrosourea (MNU)-induced cataractogenesis in rats. Materials and Methods: A single intraperitoneal injection of 70 mg/kg MNU was administered to 15-day-old male and female Sprague-Dawley rats. In Experiment 1, rats were then subcutaneously injected with 1000 mg/kg nicotinamide, either once or 3 times at 1-week intervals. In Experiment 2, rats were subcutaneously injected once with 50 mg/kg 3-aminobenzamide. For comparison, the following age-matched controls were included: MNU-untreated nicotinamide-injected rats, MNU-untreated 3-aminobenzamide-injected rats, and MNU-untreated PARP-inhibitor-untreated rats. Rats were examined for lens opacity. At 28 days after MNU injection, 10 to 20 rats per group were sacrificed. In Experiment 1, at 3 days after MNU injection, 10 rats per group were sacrificed for apoptosis and cell proliferation detection. Results: MNU caused lens epithelial cell apoptosis in the germinative zone, as indicated by TUNEL staining. However, regardless of MNU treatment, lens epithelial cell proliferation was consistently seen in the germinative zone and sporadically seen in the central zone. At 28 days after MNU, mature cataracts were observed. Nicotinamide significantly accelerated lens opacity and cataractogenesis, as indicated by a cataract index. 3-Aminobenzamide significantly accelerated the development of lens opacity and tended to accelerate cataractogenesis. Conclusion: The PARP inhibitors nicotinamide and 3-aminobenzamide accelerated MNU-induced cataractogenesis.

AB - Background: There have been no previous studies of the effects of poly(ADP-ribose) polymerase (PARP) inhibitors on N-methyl-N-nitrosourea (MNU)-induced cataractogenesis in rats. Materials and Methods: A single intraperitoneal injection of 70 mg/kg MNU was administered to 15-day-old male and female Sprague-Dawley rats. In Experiment 1, rats were then subcutaneously injected with 1000 mg/kg nicotinamide, either once or 3 times at 1-week intervals. In Experiment 2, rats were subcutaneously injected once with 50 mg/kg 3-aminobenzamide. For comparison, the following age-matched controls were included: MNU-untreated nicotinamide-injected rats, MNU-untreated 3-aminobenzamide-injected rats, and MNU-untreated PARP-inhibitor-untreated rats. Rats were examined for lens opacity. At 28 days after MNU injection, 10 to 20 rats per group were sacrificed. In Experiment 1, at 3 days after MNU injection, 10 rats per group were sacrificed for apoptosis and cell proliferation detection. Results: MNU caused lens epithelial cell apoptosis in the germinative zone, as indicated by TUNEL staining. However, regardless of MNU treatment, lens epithelial cell proliferation was consistently seen in the germinative zone and sporadically seen in the central zone. At 28 days after MNU, mature cataracts were observed. Nicotinamide significantly accelerated lens opacity and cataractogenesis, as indicated by a cataract index. 3-Aminobenzamide significantly accelerated the development of lens opacity and tended to accelerate cataractogenesis. Conclusion: The PARP inhibitors nicotinamide and 3-aminobenzamide accelerated MNU-induced cataractogenesis.

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