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Abu Dayyih W, Abu Rayyan W, Al-Matubsi HY. Impact of sildenafil-containing ointment on wound healing in healthy and experimental diabetic rats. Acta Diabetol 2020; 57:1351-1358. [PMID: 32601730 DOI: 10.1007/s00592-020-01562-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/17/2020] [Indexed: 01/02/2023]
Abstract
AIM The study evaluated the effect of different concentrations of sildenafil-containing ointment on wound healing in healthy and streptozotocin (STZ)-induced diabetic rats. METHODS A total of 108 Sprague Dawley male rats aged 5 months were randomly divided into two groups: healthy and diabetes-inducing rats. Following induction of diabetes by intraperitoneal STZ injection (55 mg/kg), diabetic and healthy rats were subdivided into six groups (9 rats each). Linear incisions of the dorsal backs of rats were made. Then, rats were treated twice daily with either 2%, 2% + Fucidin, 5% sildenafil-containing ointments, oral sildenafil (13.0 mg/kg), moist exposed burn ointment or vehicle. During treatment, the percent reduction of the wound area and tensile strength were measured on days 3, 7 and 10. Furthermore, histopathology was performed on the wounded skin on similar days for the assessment of collagen synthesis and proliferation of new capillary vessels. RESULTS In healthy and STZ-induced diabetic rats, the percent reduction in wound area on day 3 was significantly higher in sildenafil-containing ointment-treated groups than all other groups, whereas on day 7 only the 5% sildenafil-containing ointment-treated group showed better response in healthy rats. Although the sildenafil-containing ointment significantly showed better tensile strength than all other groups, the 5% sildenafil-treated group significantly enhanced the tensile better than the 2% and 2% + Fucidin dose. Furthermore, the histological evaluation revealed that sildenafil-containing ointment promoted collagen synthesis and proliferation of new capillary vessels. CONCLUSION Our results suggest that sildenafil-containing ointment can provide an advantage in wound healing by promoting wound contractions and resistance to wound breakage in healthy and diabetic conditions. Therefore, 5% sildenafil-containing ointment can be used as a support factor for wound healing in healthy and diabetic conditions; however, clinical trials are required to confirm the benefits of sildenafil in wound healing.
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Affiliation(s)
- Wael Abu Dayyih
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Amman, Jordan
| | - Walid Abu Rayyan
- Department of Pharmacology and Medical Sciences, Faculty of Pharmacy and Medical Sciences, University of Petra, Amman, Jordan
| | - Hisham Y Al-Matubsi
- Department of Pharmacology and Medical Sciences, Faculty of Pharmacy and Medical Sciences, University of Petra, Amman, Jordan.
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MalekiGorji M, Golestaneh A, Razavi SM. The effect of two phosphodiesterase inhibitors on bone healing in mandibular fractures (animal study in rats). J Korean Assoc Oral Maxillofac Surg 2020; 46:258-265. [PMID: 32855373 PMCID: PMC7469969 DOI: 10.5125/jkaoms.2020.46.4.258] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Despite advances in maxillofacial surgery, impaired bone healing remains a concern for surgical teams. Many studies have evaluated the effects of sildenafil and pentoxifylline on bone healing. However, their effects on healing of bone fractures have not been well investigated. This study aimed to assess the effects of the phosphodiesterase inhibitors sildenafil and pentoxifylline on healing of mandibular fractures in rats. MATERIALS AND METHODS A total of 60 rats were randomly divided into six groups of 10. Mandibular fracture was induced in all rats. After the surgical procedure, group C1 received saline, group S1 received 10 mg/kg sildenafil and group P1 received 50 mg/kg pentoxifylline. The rats were sacrificed after 1 week. Groups C4, S4, and P4 received pharmaceutical therapy as in groups C1, S1, and P1 but were sacrificed after 4 weeks. The samples then underwent histological analysis. RESULTS The mean rate of bone healing of mandibular fractures in groups S1 and P1 was significantly higher than in group C1 at 1 week (P<0.001). The mean rate of bone healing of mandibular fractures in group P1 was higher than in group S1 at 1 week (P=0.04). The mean rate of bone healing of mandibular fractures in groups S4 (P=0.001) and P4 (P=0.004) was significantly higher than in group C4 at 4 weeks, but no significant difference was noted in the rate of healing between groups P4 and S4 (P=0.53). CONCLUSION Sildenafil and pentoxifylline can be used as adjuncts to enhance bone healing in rats.
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Affiliation(s)
- Mohsen MalekiGorji
- Department of Oral and Maxillofacial Surgery, Dental School, Islamic Azad University, Isfahan (Khorasgan) Branch, Iran
| | - Arash Golestaneh
- Department of Oral and Maxillofacial Surgery, Dental School, Islamic Azad University, Isfahan (Khorasgan) Branch, Iran
| | - Seyyed Mohammad Razavi
- Torabinejad Dental Research Center and Department of Oral and Maxillofacial Pathology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
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Polydeoxyribonucleotide Exerts Therapeutic Effect by Increasing VEGF and Inhibiting Inflammatory Cytokines in Ischemic Colitis Rats. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2169083. [PMID: 32149087 PMCID: PMC7056995 DOI: 10.1155/2020/2169083] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/14/2020] [Accepted: 01/24/2020] [Indexed: 12/11/2022]
Abstract
Ischemic colitis is resulted from an inadequate blood supply to a segment or entire colon. Polydeoxyribonucleotide (PDRN), extracted from salmon sperm, has been reported to exert anti-inflammatory and anti-ischemic effects through the adenosine A2A receptor (A2AR). We investigated whether PDRN possesses therapeutic effectiveness on ischemic colitis rats. Ischemic colitis was induced by selective devascularization. The skin temperature on the ischemic colitis-induced region was determined. To assess the colonic damage score and collagen deposition, colonic tissue sections were stained with hematoxylin and eosin (H&E), and Masson trichrome staining was performed. Western blot analysis for A2AR, vascular endothelial growth factor (VEGF), cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and IL-6, Bax, Bcl-2, and extracellular signal-regulated kinase 1/2 (ERK1/2) was performed. Skin temperature was increased and mucosal damage and collagen deposition were observed in the affected colonic tissues in the ischemic colitis rats. Expressions of inflammatory cytokines (TNF-α, IL-1β, and IL-6) and inflammatory mediator (COX-2) were upregulated in the ischemic colitis rats. Apoptosis was increased by decreasing the ratio of Bcl-2 to Bax and by suppressing the phosphorylated form of ERK1/2 expression in the ischemic colitis rats. Treatment with PDRN alleviated mucosal damage reduced the expressions of inflammatory cytokines and COX-2 and inhibited apoptosis in the ischemic colitis rats. PDRN treatment more enhanced the expressions of A2AR and VEGF in the ischemic colitis rats. PDRN showed therapeutic effectiveness on ischemic colitis by increasing VEGF expression and inhibiting inflammatory cytokines and COX-2 through enhancing A2AR expression.
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MalekiGorji M, Golestaneh A. Histological Evaluation of the Effect of Sildenafil and Pentoxifylline on Mandibular Fracture Healing in Rats. JOURNAL OF RESEARCH IN DENTAL AND MAXILLOFACIAL SCIENCES 2019. [DOI: 10.29252/jrdms.4.3.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Sun B, Yuan J, Wang S, Lin J, Zhang W, Shao J, Wang R, Shi B, Hu H. Qingchang Suppository Ameliorates Colonic Vascular Permeability in Dextran-Sulfate-Sodium-Induced Colitis. Front Pharmacol 2018; 9:1235. [PMID: 30429788 PMCID: PMC6220057 DOI: 10.3389/fphar.2018.01235] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/11/2018] [Indexed: 12/13/2022] Open
Abstract
Ulcerative colitis (UC), with a long course and repeated attack, severely affects patient's life quality and increases economic burden all over the world. However, the concrete causes and mechanisms of UC are still unclear, but it is generally considered that many factors participate in this process. Qingchang Suppository (QCS) has been used in treating rectitis and colitis for about 30 years in Shanghai, China. Its satisfactory clinical effects have been proved. The aim of this study is to investigate the effect and mechanisms of QCS on colonic vascular endothelial barrier in dextran sulfate sodium (DSS)-induced colitis. The results indicated that increased vascular permeability (VP) appeared earlier than increased intestinal epithelial permeability (EP) in the process of DSS-induced colitis. QCS attenuated colonic tissue edema, vascular congestion and inflammatory cell infiltration. QCS inhibited the elevation of MPO, TNF-α, and IL-6 levels in colon tissues and alleviated the microvascular damage induced by DSS. QCS also improved colonic hypoxia and decreased the expression of VEGF, HIF-1α, and iNOS. These results revealed that QCS can reduce colonic VP and can improve vascular endothelial barrier function maybe by regulating the VEGF/HIF-1α signaling pathway.
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Affiliation(s)
- Boyun Sun
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianye Yuan
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shiying Wang
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jiang Lin
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wanjun Zhang
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jiadong Shao
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ruiqing Wang
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bei Shi
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hongyi Hu
- Department of Gastroenterology, China-Canada Center of Research for Digestive Diseases, Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Şimşek T, Ersoy ÖF, Özsoy Z, Yenidoğan E, Kayaoğlu HA, Özkan N, Şahin M. Effect of sildenafil citrate on the liver structure and function in obstructive jaundice: An experimental study. Turk J Surg 2018; 34:111-116. [PMID: 30023974 DOI: 10.5152/turkjsurg.2018.3771] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 05/18/2017] [Indexed: 01/21/2023]
Abstract
Objective We aimed to investigate the effect of 10 mg/kg sildenafil on the structure and function of the liver in a rat model of obstructive jaundice. Material and Methods Sixty-two male Wistar albino rats were distributed into six different groups. Obstructive jaundice was performed by legating the common bile duct. 10 mg/kg sildenafil citrate in drinking water was delivered orally after the operation before sacrificing them. Rats were sacrificed either after 10 or 28 days according to the study design. The blood and tissue samples from the liver were obtained to perform a biochemical and histopathological analysis to study functional and structural changes in the liver. Results At the 10th day, there was no difference between the sildenafil-treated and control groups with regard to the aspartate aminotransferase and alanine aminotransferase levels (p=0.423, p=0.661). The alkaline phosphatase total bilirubin levels among the groups were statistically different (p<0.001). At the 28th day, liver function tests except alanine aminotransferase showed significant differences among the groups (p<0.001). Liver function tests did not changed significantly between the 10th and 28th day in sildenafil-treated rats (p>0.05). Significant differences were observed among the groups with regard to cholestasis, fibrosis, inflammation, and necrosis (p<0.001). However, edema increased in the sildenafil-treated group (p<0.001). On the 28th day, the severity of structural changes in the liver after obstructive jaundice, except edema, reduced significantly (p<0.001). The sildenafil-treated groups at different time points didn't show any statistical difference in histopathological changes (p>0.05). Conclusion Oral administration of 10 mg/kg sildenafil citrate dramatically reverses the biochemical and histopathological liver changes induced by obstructive jaundice in rats.
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Affiliation(s)
- Tamer Şimşek
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Ömer Faik Ersoy
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Zeki Özsoy
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Erdinç Yenidoğan
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Hüseyin Ayhan Kayaoğlu
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Namık Özkan
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Mustafa Şahin
- Department of General Surgery, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
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Saijo H, Tatsumi N, Arihiro S, Kato T, Okabe M, Tajiri H, Hashimoto H. Microangiopathy triggers, and inducible nitric oxide synthase exacerbates dextran sulfate sodium-induced colitis. J Transl Med 2015; 95:728-48. [PMID: 25938626 DOI: 10.1038/labinvest.2015.60] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 03/07/2015] [Accepted: 03/31/2015] [Indexed: 02/08/2023] Open
Abstract
Ulcerative colitis (UC) is a representative clinical manifestation of inflammatory bowel disease that causes chronic gastrointestinal tract inflammation. Dextran sulfate sodium (DSS)-induced colitis mice have been used to investigate UC pathogenesis, and in this UC model, disturbance and impairment of the mucosal epithelium have been reported to cause colitis. However, how DSS sporadically breaks down the epithelium remains unclear. In this study, we focused on the colonic microcirculation and myenteric neurons of DSS-induced colitis. Moreover, we examined the potential of myenteric neurons as a target to prevent exacerbation of colitis. Fluorescent angiographic and histopathological studies revealed that DSS administration elicited blood vessel disruption before epithelial disorders appeared. Ischemic conditions in the lamina propria induced inducible nitric oxide synthase (iNOS) expression in myenteric neurons as colitis aggravated. When neuronal activity was inhibited with butylscopolamine, neuronal iNOS expression decreased, and the exacerbation of colitis was prevented. These results suggested that DSS-induced colitis was triggered by microcirculatory disturbance in the mucosa, and that excessive neuronal excitation aggravated colitis. During remission periods of human UC, endoscopic inspection of the colonic microcirculation may enable the early detection of disease recurrence, and inhibition of neuronal iNOS expression may prevent the disease from worsening.
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Affiliation(s)
- Hiroki Saijo
- 1] Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan [2] Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Norifumi Tatsumi
- Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
| | - Seiji Arihiro
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomohiro Kato
- Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan
| | - Masataka Okabe
- Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
| | - Hisao Tajiri
- 1] Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan [2] Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan
| | - Hisashi Hashimoto
- Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
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Cakir T, Ozer I, Bostanci EB, Keklik TT, Ercin U, Bilgihan A, Akoglu M. Increased collagen maturity with sildenafil citrate: experimental high risk colonic anastomosis model. Int J Surg 2014; 13:152-156. [PMID: 25498489 DOI: 10.1016/j.ijsu.2014.11.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 11/20/2014] [Accepted: 11/27/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND Inadequate healing and high anastomosis leak rates at rectal anastomosis may be due to lack of supportive serosal layer and technical difficulty of low anterior resections. Positive effects of sildenafil on wound healing were observed. The aim of this study was to simulate rectal anastomosis as a technical insufficient anastomosis and investigate the effects of sildenafil on anastomosis healing. METHODS Colonic anastomoses were carried out in 64 rats and randomized into four groups, CA-S, complete anastomoses without sildenafil (10 mg/kg for 5 days); CA+S, complete anastomoses with sildenafil; IA-S, incomplete anastomoses without sildenafil; IA+S, incomplete anastomoses with sildenafil. Half of the rats in every group were sacrificed on post-operative day (POD) 3, half of them sacrificed on POD 7. Tissues from the anastomoses were used for functional, histochemical, biochemical investigations. RESULTS Sildenafil treatment resulted in increased bursting pressures in IA+S on POD 7 (p=0.010). Collagen maturity was higher in IA+S on POD 3 and POD 7, CA+S on POD 7 (p=0.010; p=0.010; p<0.007). Collagen content was higher in IA+S on POD 7 (p<0.001). Glutathione, hydroxyproline levels were similar. Malondialdehyde levels were lower in IA+S on POD 3 (p<0.001). Epithelization score was higher in IA+S on POD 7 (p=0.007). Inflammation score was higher in CA-S group on POD 3 and POD 7 (p<0.001; p<0.001). Neutrophil score was lower in CA+S on POD 3 (p=0.005). CONCLUSION An increase in collagen content, maturity, and epithelization, a decrease in neutrophil infiltration, oxidative stress and better mechanical strength were observed with the administration of sildenafil.
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Affiliation(s)
- Tebessum Cakir
- Department of Gastroenterological Surgery, Turkiye Yuksek Ihtisas Training and Research Hospital, Hacettepe Mah, 06230 Ankara, Turkey.
| | - Ilter Ozer
- Department of Gastroenterological Surgery, Turkiye Yuksek Ihtisas Training and Research Hospital, Hacettepe Mah, 06230 Ankara, Turkey
| | - Erdal Birol Bostanci
- Department of Gastroenterological Surgery, Turkiye Yuksek Ihtisas Training and Research Hospital, Hacettepe Mah, 06230 Ankara, Turkey
| | - Tulay Timucin Keklik
- Department of Pathology, Turkiye Yuksek Ihtisas Training and Research Hospital, Hacettepe Mah, 06230 Ankara, Turkey
| | - Ugur Ercin
- Department of Biochemistry, Bilecik Public Hospital, Ertuğrulgazi Mah, 11040 Bilecik, Turkey
| | - Ayse Bilgihan
- Department of Biochemistry, Gazi University School of Medicine, Emniyet Mah, 06560 Ankara, Turkey
| | - Musa Akoglu
- Department of Gastroenterological Surgery, Turkiye Yuksek Ihtisas Training and Research Hospital, Hacettepe Mah, 06230 Ankara, Turkey
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Aziret M, Irkorucu O, Reyhan E, Erdem H, Das K, Ozkara S, Surmelioglu A, Sozen S, Bali I, Cetinkunar S, Deger KC. The effects of vardenafil and pentoxifylline administration in an animal model of ischemic colitis. Clinics (Sao Paulo) 2014; 69:763-9. [PMID: 25518035 PMCID: PMC4255201 DOI: 10.6061/clinics/2014(11)10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 07/10/2014] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVES Vardenafil enhances dilatation of vascular smooth muscle and inhibits platelet aggregation. The purpose of this study was to evaluate the clinical effects of vardenafil and pentoxifylline administration in an experimental model of ischemic colitis. METHODS Forty female Wistar albino rats weighing 250-300 g were randomized into five experimental groups (each with n = 8) as follows:1) a sham group subjected to a sham surgical procedure and administered only tap water; 2) a control group subjected to a standardized surgical procedure to induce ischemic colitis and administered only tap water; 3) and 4) treatment groups subjected to surgical induction of ischemic colitis followed by the postoperative administration of 5 mg/kg or 10 mg/kg vardenafil, respectively; and 5) a treatment group subjected to surgical induction of ischemic colitis followed by postoperative administration of pentoxifylline at 50 mg/kg/day per day as a single dose for a 3-day period. All animals were sacrificed at 72 h post-surgery and subjected to relaparotomy. We scored the macroscopically visible damage, measured the ischemic area and scored histopathology to determine the severity of ischemia. Tissue malondialdehyde levels were also quantified. RESULTS The mean Gomella ischemic areas were 63.3 mm2 in the control group; 3.4 and 9.6 mm2 in the vardenafil 5 and vardenafil 10 groups, respectively; and 3.4 mm2 in the pentoxifylline group (p = 0.0001). The mean malondialdehyde values were 63.7 nmol/g in the control group; 25.3 and 25.6 nmol/g in the vardenafil 5 and vardenafil 10 groups, respectively; and 22.8 nmol/g in the pentoxifylline group (p = 0.0001). CONCLUSION Our findings indicate that vardenafil and pentoxifylline are effective treatment options in an animal model of ischemic colitis. The positive clinical effects produced by these drugs are likely due to their influence on the hemodynamics associated with vascular smooth muscle and platelet functions.
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Affiliation(s)
- Mehmet Aziret
- Kars State HospitalDepartment of General SurgeryKars, Department of General Surgery, Kars State Hospital, TurkeyKars, Turkey
| | - Oktay Irkorucu
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Enver Reyhan
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Hasan Erdem
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Koray Das
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Selvinaz Ozkara
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Ali Surmelioglu
- Department of Pathology, Haydarpaşa Training and Research Hospital, İstanbul, Turkey
| | - Selim Sozen
- Department of General Surgery, Namık Kemal University, Tekirdağ, Turkey
| | - Ilhan Bali
- Department of General Surgery, Namık Kemal University, Tekirdağ, Turkey
| | - Sulleyman Cetinkunar
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
| | - Kamuran Cumhur Deger
- Department of General Surgery, Adana Adana Numune Training and Research Hospital, Adana, Turkey
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Fakhfouri G, Rahimian R, Hashemi S, Rasouli MR, Bahremand A, Mehr SE, Khorramizadeh MR, Dehpour AR. Sildenafil attenuates TNBS-induced colitis in rats: possible involvement of cGMP and KATP channels. Fundam Clin Pharmacol 2012; 26:190-3. [PMID: 21777273 DOI: 10.1111/j.1472-8206.2011.00928.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The involvement of cGMP/KATP pathway in effects of sildenafil on experimental colitis was investigated. Sildenafil significantly attenuated colonic injury markers. These effects were reversed by the addition of glibenclamide or ODQ, indicating the involvement of ATP-sensitive potassium channels (KATP) and cGMP, respectively.
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Affiliation(s)
- Gohar Fakhfouri
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Ozdegirmenci O, Kucukozkan T, Akdag E, Topal T, Haberal A, Kayir H, Oter S, Akyol M, Uzbay T. Effects of sildenafil and tadalafil on ischemia/reperfusion injury in fetal rat brain. J Matern Fetal Neonatal Med 2010; 24:317-23. [PMID: 20540678 DOI: 10.3109/14767058.2010.492061] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of the present study was to evaluate the effects of phosphodiesterase type 5 (PDE5) inhibitory drugs, sildenafil and tadalafil, in ischemia/reperfusion (I/R)-induced oxidative injury in fetal rat brain. METHODS Timed pregnant adult Wistar rats were randomly assigned to the following groups (n = 6 for each group): saline + none I/R (1), saline + I/R (2), sildenafil + none I/R (3); sildenafil + I/R (4), tadalafil + none I/R (5) and tadalafil + I/R (6). Fetal ischemia was induced by clamping the utero-ovarian artery bilaterally. Fetuses were delivered and 268 fetal rats were decapitated. Malondialdehyde (MDA) levels and, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were assessed in fetal brain tissue homogenates by spectrophotometric methods. RESULTS In saline + I/R group, MDA levels were increased and, SOD and GSH-Px activities were decreased significantly comparing with saline + none I/R group. Both tadalafil and sildenafil treatment decreased the MDA levels significantly in ischemia/reperfusion groups, whereas this effect was significantly more potent with tadalafil. SOD levels were significantly decreased in all groups after I/R. Tadalafil seems to be more effective than sildenafil by means of increasing GSH-Px activity significantly after I/R. CONCLUSION Our results indicate some beneficial effects of PDE5 inhibitory drugs, especially tadalafil, on oxidative I/R injury in fetal rat brains.
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Affiliation(s)
- Ozlem Ozdegirmenci
- Department of Obstetric and Gynecology, Etlik Zubeyde Hanim Women's Health Teaching and Research Hospital, Ankara, Turkey.
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Effects of sildenafil citrate on ischemic colonic anastomotic healing in rats: its relationship between nitric oxide and oxidative stress. World J Surg 2009; 33:160. [PMID: 18843440 DOI: 10.1007/s00268-008-9767-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tadauchi A, Narita Y, Kagami H, Niwa Y, Ueda M, Goto H. Novel cell-based therapeutic strategy for ischemic colitis with use of bone marrow-derived mononuclear cells in rats. Dis Colon Rectum 2009; 52:1443-51. [PMID: 19617758 DOI: 10.1007/dcr.0b013e3181a79549] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE Ischemic colitis is a common disorder of the large bowel. In the clinical setting, some patients suffer refractory ischemic colitis regardless of conventional treatment. Meanwhile, bone marrow-derived mononuclear cells are known to accelerate neovascularization. The purpose of this study was to verify the effects of bone marrow-derived mononuclear cells on ischemic colitis in rats. METHODS An ischemic colitis model was established by partial obstruction of the rectum and interruption of the marginal vessel in the immunodeficient rat. Bone marrow-derived mononuclear cells from a Wistar rat were injected into the ischemic area one day later than the ischemia (Group MNC). As a control, phosphate-buffered saline was injected in the same manner (Group PBS). Seven days after cell transplantation, each rat was evaluated for histology and colic motility. RESULTS Compared with Group PBS scores, the Group MNC macroscopic and microscopic colitis severity scores were significantly reduced. Moreover, the density of the capillary and myenteric plexus was significantly higher in Group MNC than in Group PBS (9.55 +/- 0.74 vs. 4.61 +/- 0.22, respectively, P < 0.01; and 8.57 +/- 0.41 vs. 5.93 +/- 0.31, respectively, P < 0.02). The whole-gut transit time was significantly shorter in Group MNC compared with Group PBS (472.7 +/- 17.6 vs. 584.8 +/- 24.0 minutes, respectively, P < 0.01). Transplanted cells were detected in all layers of the intestinal wall; however, these cells did not differentiate into vascular or neural cells. CONCLUSIONS These results suggest that transplantation of bone marrow-derived mononuclear cells might enhance not only tissue regeneration and angiogenesis but also neurogenesis. Transplantation of bone marrow-derived mononuclear cells may be a useful therapeutic strategy for ischemic colitis.
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Affiliation(s)
- Akimitsu Tadauchi
- Department of Gastroenterology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Irkorucu O, Comert M. Effects of intraperitoneal sildenafil administration on healing of left colonic anastomoses and intra-abdominal adhesion formation in the presence of intra-abdominal infection. Dis Colon Rectum 2009; 52:1026; author reply 1026-7. [PMID: 19502877 DOI: 10.1007/dcr.0b013e3181a4fb8f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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16
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Effect of sildenafil on wound healing: an experimental study. Langenbecks Arch Surg 2009; 395:713-8. [DOI: 10.1007/s00423-009-0471-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Accepted: 01/30/2009] [Indexed: 11/26/2022]
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Medhi B, Kaur H, Prakash A. Effect of sildenafil in an experimental model of ischemic colitis. Dig Dis Sci 2009; 54:419. [PMID: 18975075 DOI: 10.1007/s10620-008-0523-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Accepted: 08/28/2008] [Indexed: 12/09/2022]
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Ayten R, Cetinkaya Z, Girgin M, Ozercan I, Ustundag B, Aygen E. The effects of intraperitoneal sildenafil administration on healing of left colonic anastomoses and intra-abdominal adhesion formation in the presence of intra-abdominal infection. Dis Colon Rectum 2008; 51:1837-41. [PMID: 18607551 DOI: 10.1007/s10350-008-9398-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2008] [Revised: 04/30/2008] [Accepted: 05/04/2008] [Indexed: 12/22/2022]
Abstract
PURPOSE The objective of this pilot study was to establish an animal model for intra-abdominal infection and to examine the effect of sildenafil on anastomotic healing of the left colon and intra-abdominal adhesion formation. METHODS Fourteen Winstar rats underwent colonic transsection and primary anastomosis after performing intra-abdominal infection. Rats were divided into two groups: Group 1 (n = 7): intra-abdominal infection, resection, and anastomoses; Group 2 (n = 7): intra-abdominal infection, resection, anastomoses, and sildenafil. Anastomotic bursting pressures, hydroxyproline levels, histopathologic grading, and abdominal adhesions were accessed on the postoperative Day 7. RESULTS Anastomotic healing was found to be improved in terms of a bursting pressure (P = 0.02). Histopathological examination revealed an increase in angiogenesis (P = 0.007). Moreover, intra-abdominal adhesions were significantly less in rats given sildenafil (P = 0.03). CONCLUSION Sildenafil may improve anastomotic healing of the left colon and diminishes peritoneal adhesion formation in the presense of abdominal infection.
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Affiliation(s)
- Refik Ayten
- Department of General Surgery, Faculty of Medicine, Firat University, Elazig, Turkey.
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Abstract
INTRODUCTION Phosphodiesterase type 5 (PDE5) hydrolyses cyclic guanylate monophosphate (cGMP) specifically to 5' GMP. PDE5 inhibitors were a breakthrough medication that addressed a previously unfulfilled medical need. They promoted vascular relaxation in the corpora cavernosa and penile erection during sexual stimulation. Sildenafil, vardenafil, and tadalafil were approved then introduced as effective treatments for male erectile dysfunction. This impact has stimulated academic, clinical, and industrial research. AIM To highlight the nonerectogenic beneficial uses of oral PDE5 inhibitors. METHOD A systematic review of published studies in this affair based on a Pubmed and medical subject heading databases search of all concerned articles. MAIN OUTCOME MEASURES Demonstrated beneficial as well as applicable uses of oral PDE5 inhibitors. RESULTS As chemical molecules, these drugs were shown to exert potential nonerectogenic beneficial effects. They showed efficacy as a useful adjunct in the management of pulmonary hypertension. Additional uses were extended to different utilities: essential hypertension, benign prostatic hyperplasia, gastrointestinal disorders, endothelial dysfunction, female sexual dysfunction, genital blood flow, exercise capacity, Raynaud's phenomenon, sperm motility, etc. CONCLUSION Exploring PDE5 inhibitors for their possible medical applications in diverse specialties seems to be beneficial in making use of these molecules for the welfare of humanity.
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Affiliation(s)
- Taymour Mostafa
- Andrology & Sexology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.
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Irkorucu O, Ucan BH, Cakmak GK, Emre AU, Tascilar O, Ofluoglu E, Bahadir B, Karakaya K, Demirtas C, Ankarali H, Kertis G, Pasaoglu H, Comert M. Does sildenafil reverse the adverse effects of ischemia on ischemic colon anastomosis: yes, 'no'. Int J Surg 2008; 7:39-43. [PMID: 19022713 DOI: 10.1016/j.ijsu.2008.10.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 09/27/2008] [Accepted: 10/10/2008] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Sildenafil may lead an improvement in anastomotic healing of ischemic left colon anastomosis. METHODS Thirty-six male Wistar albino rats were randomized into four experimental groups (n=9 in each group). In group 1, a well-perfused left colonic segment was transected, and free ends were anatomosed. In groups 2, 3 and 4 animals underwent a standardized surgical procedure to induce ischemic left colon anastomosis. Group 2 animals received only tap water. In groups 3 and 4 animals received 10mg/kg/body-weight and 20mg/kg/body-weight sildenafil, single dose a day during 4 days, respectively. Rats were sacrificed on day 4 following operation. Anastomotic integrity, intra-peritoneal adhesion scores, anastomotic bursting pressures and tissue hydroxyproline levels were recorded. Histopathological examination of the anastomosis was also performed. RESULTS There was no statistically significant difference among groups with respect to anastomotic integrity (p=0.142) but ischemia decreased the anastomotic bursting pressure. The mean bursting pressure values were 78.8+/-24.1, 43.3+/-26, 55.1+/-32.4, and 43.3+/-20.4 in groups 1, 2, 3, and 4, respectively. Group 1 had the highest values whereas; there was no statistically significant difference between groups 1 and 3. There was no statistically significant difference among groups 2, 3, and 4 with respect to tissue hydroxyproline levels, adhesion scores and the Chiu scores. The highest inflammatory cell presence in the granulation tissue was detected in group 2, whereas the lowest was detected in group 4 (p=0.0001). The highest fibroblast infiltration in the granulation tissue was detected in group 1 (p=0.045). DISCUSSION Our results showed that 10mg/kg sildenafil decreased the adverse effects of ischemia on the healing of ischemic left colon anastomosis. Additional investigations are needed to confirm the effects of phosphodiesterase-5 inhibitors in ischemic colon anastomosis models.
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Affiliation(s)
- Oktay Irkorucu
- Department of General Surgery, Zonguldak Karaelmas University, School of Medicine, Kozlu, Zonguldak, Turkiye.
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