Comparison of the protective effects of sildenafil, vardenafil and tadalafil treatments in ischemia-reperfusion injury in rat ovary

Objectives: The aim of this study was to compare the effects of sildenafil, vardenafil and tadalafil in treatment for ischemia/ reperfusion injury which is created experimentally in rat ovaries.  Material and methods: For this study, 30 female Wistar albino rats were used, and the rats were separated randomly into five groups consisting of six rats each: normal, torsion-detorsion, torsion-detorsion + sildenafil 1.4 mg/kg, torsion-detorsion + vardenafil 1.7 mg/kg and torsion-detorsion + tadalafil 5.0 mg/kg. The agents were given intraperitoneally 30 minutes before detorsion. An ovarian torsion procedure was implemented in all other groups for 3 hours with the exception of the normal group. Then, a detorsion procedure was implemented to the groups for 3 hours.  Results: The sildenafil and vardenafil treatments showed protective effect by preventing significant increase in inflammation parameters. (p = 0.058, 0.138). The tadalafil treatment was only protective for cellular degeneration (p = 0.140). The vardenafil treatment was protective for edema (p = 0.238), vascular congestion (p = 0.111), inflammation (p = 0.138) and cellular degeneration (p = 0.532). Sildenafil, vardenafil and tadalafil inhibited the increase of atretic follicle. AMH levels were statistically different between torsion and detorsion and vardenafil group (p = 0.004, 0.004), whereas tadalafil and sildenafil groups were similar to normal group (p = 0.108, 0.108). Conclusions: PDE inhibitors were found to be effective in reducing ovarian ischemia/reperfusion injury. Sildenafil and tadalafil seem to be more effective than the vardenafil in protecting the ovarian reserve

The expression levels of genes involved in JNK signaling decrease by aging in the liver

Aim: The c-Jun NH2-terminal kinases (JNK) signaling pathway is an important signaling pathway in liver regeneration. it was planned to investigate the expression levels of Mitogen Activated Protein Kinase Kinase (MKK)-4 and -7 (MKK7), which are mediator molecules involved in the JNK signaling pathway and Activating Transcription Factor (ATF) 2 transcription factor genes, which are in the last stage of the signaling pathway, in liver tissues in young and old mice. In addition, it was aimed to examine the ultrastructural changes caused by aging in hepatocytes. Material and Methods: We examined MKK4, MKK7 and ATF2 expression levels by using Real Time Polymerase Chain Reaction (RT-qPCR) method. Transmission electron microscopy (TEM) was used to observe the ultrastructural changes of hepatocytes. Results: While MKK4 and ATF2 gene expressions reduced in the liver of aged mice, MKK7 gene expression did not change. In TEM examinations, granular endoplasmic reticulum loss and mitochondrial damage were observed in elderly individuals. Conclusion: According to these results, spontaneous liver damage that can be seen in aged subjects may be caused by disruption in cellular signaling pathways and organelle damage in hepatocytes

Primary Cutaneous Angiosarcoma on the Nose in a Patient with Multiple Nonmelanoma Skin Cancers

Cutaneous angiosarcoma is an uncommon, potentially metastatic and highly aggressive vascular tumor that may arise as de novo or be associated with previous radiotherapy. A 70-year-old female with a solitary lesion on the nose was initially diagnosed as actinic keratosis. However, when the recurring lesion at the same region within 6 months was reexcised, the histological diagnosis was definitively established as well-differentiated angiosarcoma. This case was presented in order to increase awareness of this rare malignancy in an uncommon localisation, especially in the light of pathological findings. Moreover, occurrence of cutaneous angiosarcoma within a short period following a previous excision in a patient with a history of multiple nonmelanoma skin cancers was interestingly pointed out. 
 Keywords: angiosarcoma; face; nonmelanoma skin cancers. 
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Primary Cutaneous Angiosarcoma on the Nose in a Patient with Multiple Nonmelanoma Skin Cancers

Cutaneous angiosarcoma is an uncommon, potentially metastatic and highly aggressive vascular tumor that may arise as de novo or be associated with previous radiotherapy. A 70-year-old female with a solitary lesion on the nose was initially diagnosed as actinic keratosis. However, when the recurring lesion at the same region within 6 months was reexcised, the histological diagnosis was definitively established as well-differentiated angiosarcoma. This case was presented in order to increase awareness of this rare malignancy in an uncommon localisation, especially in the light of pathological findings. Moreover, occurrence of cutaneous angiosarcoma within a short period following a previous excision in a patient with a history of multiple nonmelanoma skin cancers was interestingly pointed out.  Keywords: angiosarcoma; face; nonmelanoma skin cancers.  

Dexmedetomidine improves ultrastructural view of renal damage and biochemical parameters during an experimental inflammatory bowel disease

Investigation of the effect of Dexmedetomidine (Dex) on inflammatory bowel diseases (IBD) induced renal damage by using an experimental model. IBD frequently cause reduction in renal function and renal failure. Since perioperative anesthesia and postoperative conditions in intensive care can cause acute kidney injury and reduction on renal function; deciding on a sedative and anesthetic agent without side effects would reduce IBD caused renal damage. We investigated histopathological, electron microscopic analyzes and antioxidant effects of Dex on kidney tissue during trinitrobenzene sulfonic acid (TNBS) induced damage in BALB/c mice at two different concentrations of Dex; 5μg/kg and 30μg/kg. Blood samples were collected to analyze creatinine levels. The levels of malondialdehyde (MDA) and activity of antioxidant enzymes glutathione (GSH) and superoxide dismutase (SOD) were measured in tissue homogenates. Histopathological and ultrastructural changes in kidney following TNBS induction were significantly reduced in Dex treatment groups. Administration of Dex significantly reduced creatinine levels. MDA levels were significantly reduced in Dex groups. Administration of Dex brought back GSH level to control level. Administration of Dex significantly 1.48 and 1.96 times increased SOD activity at 5μg/kg and 30 μg/kg, respectively. Dexmedetomidine treatment may have benefits to prevent IBD induced renal damage. [Med-Science 2018; 7(3.000): 594-9

Whole Slide Images in Artificial Intelligence Applications in Digital Pathology: Challenges and Pitfalls

The use of digitized data in pathology research is rapidly increasing. The whole slide image (WSI) is an indispensable part of the visual examination of slides in digital pathology and artificial intelligence applications; therefore, the acquisition of WSI with the highest quality is essential. Unlike the conventional routine of pathology, the digital conversion of tissue slides and the differences in its use pose difficulties for pathologists. We categorized these challenges into three groups: before, during, and after the WSI acquisition. The problems before WSI acquisition are usually related to the quality of the glass slide and reflect all existing problems in the analytical process in pathology laboratories. WSI acquisition problems are dependent on the device used to produce the final image file. They may be related to the parts of the device that create an optical image or the hardware and software that enable digitization. Post-WSI acquisition issues are related to the final image file itself, which is the final form of this data, or the software and hardware that will use this file. Because of the digital nature of the data, most of the difficulties are related to the capabilities of the hardware or software. Being aware of the challenges and pitfalls of using digital pathology and AI will make pathologists' integration to the new technologies easier in their daily practice or research

The effect of curcumin on healing in an animal nasal septal perforation model

Objectives/Hypothesis We investigated the effect of intranasal topical curcumin on nasal septum mucosa wound healing in a nasal septal perforation model produced in rabbits. Study Design Experimental study. Methods Fourteen male New Zealand rabbits were included in the study. For each rabbit, 5-mm-diameter circular perforations were created at 5 mm away from the columella to the nasal septum. Curcumin (study group) and saline (control group) were administered intranasally once daily for 10 days. At the end of the 10th day, the animals were sacrificed and the nasal septum specimens were sent for histological examination. Epithelial regeneration and degeneration, cartilage degeneration and regeneration, presences of fibroblast, eosinophil, acute/chronic inflammatory and giant cells, capillary density, amounts of granulation tissue and collagen, and macroscopic closure rate of perforation parameters were compared in each group. Results Epithelial and cartilage regeneration, and the amounts of collagen and granulation tissue were significantly higher in the curcumin group compared to the control group (P .05). Conclusions Topical application of curcumin improves the wound-healing process of nasal septum perforation in the animal model. Therefore, curcumin can be used as a safe and effective medical agent to prevent the development of septal perforation. Level of Evidence NA Laryngoscope, 201

Salivary gland anlage tumour of the nasopharynx: A case report and review for histopathological characteristics

Introduction: Congenital salivary gland anlage tumour of the nasopharynx is a lesion which usually presents with nasal and upper respiratory tract obstruction in the neonatal period. Timely diagnosis is essential to prevent the occurrence of respiratory complications in later childhood. Case Report: We present a 8-year-old boy complaining from difficulty in breathing and breastfeeding in the neonatal period due to an adenoid-like nasopharyngeal mass. Histological examination revealed solid and cystic squamous nests and numerous duct-like structures within collagenised stroma. Both epithelial and myoepithelial differentiation were noted in the tubular component. Discussion: A review of the clinical and histopathological features of published cases revealed that ancient lesions showed more prominent and complex epithelial component and more collagen rich stroma. We would like to suggest the possibility of salivary gland anlage tumour to be considered in the differential diagnosis of neonatal respiratory distress cases