Abstract |
The effects of polydeoxyribonucleotide (PDRN), an agonist of the A2A adenosine receptors which when activated positively influences sperm activity, were tested in an experimental testicular ischaemia/ reperfusion injury model. Anaesthetized male Sprague-Dawley rats were subjected to testicular torsion-induced ischaemia, followed by reperfusion (TI/R). Immediately after detorsion, randomized animals, including SHAM, received intraperitoneal injections of: (i) vehicle (1 mL/kg 0.9% NaCl solution); (ii) PDRN (8 mg/kg); (iii) DMPX (3,7-dimethyl-1-propargilxanthine, 0.1 mg/kg); or (iv) PDRN (8 mg/kg) + DMPX (0.1 mg/kg). Animals were euthanized at 1, 7 and 30 days following reperfusion. Vascular endothelial growth factor ( VEGF) expression is normally associated with adenosine A2A receptor stimulation. After treatment, VEGF mRNA/ protein expression quantified by qPCR and Western blot, vascular endothelial growth factor receptor-1 (VEGFR1) and endothelial nitric oxide synthase (eNOS) mRNA measured by qPCR, VEGF and VEGFR1 assessed using immunohistochemical methods, histological staining and spermatogenic activity were all analysed. Testis ischaemia-reperfusion (TI/R) injury caused increases in VEGF mRNA and protein, VEGFR1 and eNOS mRNA, histological damage and reduced spermatogenic activity. Immunostaining showed a lower expression of VEGF in germinal epithelial cells and a strong expression of VEGFR1 in Leydig cells after TI/R. PDRN administration increased significantly VEGF message/ protein, VEGFR1 and eNOS message, decreased histological damage and ameliorated spermatogenic activity. PDRN might be useful in the management of testicular torsion.
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Authors | L Minutoli, P Antonuccio, F Squadrito, A Bitto, P A Nicotina, C Fazzari, F Polito, H Marini, G Bonvissuto, S Arena, G Morgia, C Romeo, A P Caputi, D Altavilla |
Journal | International journal of andrology
(Int J Androl)
Vol. 35
Issue 2
Pg. 133-44
(Apr 2012)
ISSN: 1365-2605 [Electronic] England |
PMID | 21651579
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2011 The Authors. International Journal of Andrology © 2011 European Academy of Andrology. |
Chemical References |
- Adenosine A2 Receptor Agonists
- Polydeoxyribonucleotides
- RNA, Messenger
- Vascular Endothelial Growth Factor A
- Nitric Oxide Synthase Type III
- Vascular Endothelial Growth Factor Receptor-1
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Topics |
- Adenosine A2 Receptor Agonists
(pharmacology)
- Animals
- Immunohistochemistry
- Leydig Cells
(metabolism)
- Male
- Nitric Oxide Synthase Type III
(genetics, metabolism)
- Polydeoxyribonucleotides
(pharmacology)
- RNA, Messenger
(genetics, metabolism)
- Random Allocation
- Rats
- Rats, Sprague-Dawley
- Reperfusion Injury
(drug therapy, metabolism, pathology)
- Spermatic Cord Torsion
(drug therapy, metabolism, pathology)
- Spermatogenesis
(drug effects)
- Testis
(blood supply, drug effects, pathology)
- Vascular Endothelial Growth Factor A
(genetics, metabolism)
- Vascular Endothelial Growth Factor Receptor-1
(biosynthesis, genetics, metabolism)
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