Investigation of the Effect of Local and Systemic Preoperative Dexamethasone Application on Bone Tissue Healing in Mandibular Bone Defects.

OBJECTIVES: The aim of this study was to investigate the effect of locally and systemically delivered single-dose corticosteroid injections on bone tissue. STUDY DESIGN: A total of 84 Wistar albino rats were divided into 2 groups as local and systemic injection groups, and 2 groups as control and experiment among themselves. Before the procedure, dexamethasone was given to the experimental group and physiological saline was given to the control group. A defect was created in the jawbone. It was sacrificed on the third, seventh, and 40th days. The mandible bones of the sacrificed rats were removed and the healing of the bone tissue was examined histopathologically. RESULTS: No significant difference was observed in the tissue sections of the subjects sacrificed after 40 days. However, the increase in fibroblastic connective tissue and the number of osteoblasts were less in the experimental local groups that were sacrificed after 7 days compared with the control groups (P=0.040 and 0.041). Again, it was determined that there was a statistically significant decrease in the experimental local group compared with the experimental systemic group (P=0.040 and 0.004). CONCLUSIONS: It can be said that single-dose corticosteroid applications cause a delay in bone healing in the early period.

Effects of antidiabetics and exercise therapy on suppressors of cytokine signaling-1, suppressors of cytokine signaling-3, and insulin receptor substrate-1 molecules in diabetes and obesity.

OBJECTIVE: Pathological destruction of insulin signaling molecules such as insulin receptor substrate, especially due to the increase in suppressors of cytokine signaling molecules, has been demonstrated in experimental diabetes. The contribution of suppressors of cytokine signaling proteins to the development of insulin resistance and the effects of antidiabetic drugs and exercise on suppressors of cytokine signaling proteins are not clearly known. METHODS: A total of 48 Wistar albino adult male rats were divided into six groups: control group, obese group with diabetes, obese diabetic rats treated with metformin, obese diabetic rats treated with pioglitazone, obese diabetic rats treated with exenatide, and obese diabetic rats with applied exercise program. Immunohistochemical staining was performed in both the liver and adipose tissue. RESULTS: There was a statistically significant decrease in suppressors of cytokine signaling-1, a decrease in suppressors of cytokine signaling-3, an increase in insulin receptor substrate-1, and a decrease in immunohistochemical staining in the obese group treated with metformin and exenatide compared to the obese group without treatment in the liver tissue (p<0.05). A statistically significant decrease in immunohistochemical staining of suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 was found in the obese group receiving exercise therapy compared to the obese group without treatment in visceral adipose tissue (p<0.05). Likewise, no significant immunohistochemistry staining was seen in diabetic obese groups. CONCLUSION: Metformin or exenatide treatment could prevent the degradation of insulin receptor substrate-1 protein by reducing the effect of suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 proteins, especially in the liver tissue. In addition, exercise can play a role as a complementary therapy by reducing suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 proteins in visceral adipose tissue.

Effects of antidiabetics and exercise therapy on suppressors of cytokine signaling-1, suppressors of cytokine signaling-3, and insulin receptor substrate-1 molecules in diabetes and obesity

SUMMARY OBJECTIVE: Pathological destruction of insulin signaling molecules such as insulin receptor substrate, especially due to the increase in suppressors of cytokine signaling molecules, has been demonstrated in experimental diabetes. The contribution of suppressors of cytokine signaling proteins to the development of insulin resistance and the effects of antidiabetic drugs and exercise on suppressors of cytokine signaling proteins are not clearly known. METHODS: A total of 48 Wistar albino adult male rats were divided into six groups: control group, obese group with diabetes, obese diabetic rats treated with metformin, obese diabetic rats treated with pioglitazone, obese diabetic rats treated with exenatide, and obese diabetic rats with applied exercise program. Immunohistochemical staining was performed in both the liver and adipose tissue. RESULTS: There was a statistically significant decrease in suppressors of cytokine signaling-1, a decrease in suppressors of cytokine signaling-3, an increase in insulin receptor substrate-1, and a decrease in immunohistochemical staining in the obese group treated with metformin and exenatide compared to the obese group without treatment in the liver tissue (p<0.05). A statistically significant decrease in immunohistochemical staining of suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 was found in the obese group receiving exercise therapy compared to the obese group without treatment in visceral adipose tissue (p<0.05). Likewise, no significant immunohistochemistry staining was seen in diabetic obese groups. CONCLUSION: Metformin or exenatide treatment could prevent the degradation of insulin receptor substrate-1 protein by reducing the effect of suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 proteins, especially in the liver tissue. In addition, exercise can play a role as a complementary therapy by reducing suppressors of cytokine signaling-1 and suppressors of cytokine signaling-3 proteins in visceral adipose tissue.

Spindle Variant Primary Diffuse Large B Cell Lymphoma of the Colon: Case Report and Literature Review.

Diffuse large B cell lymphoma (DLBCL) with spindle cell morphology is a rare variant that can be seen in extranodal regions. Because the spindle cell dominant morphology in lymphoma is extremely unusual, the diagnosis can easily be missed in many organ systems. We present a case of an 82-year-old male patient with complaints of abdominal pain and swelling. He operated with the preliminary diagnosis of cecum tumor and ileum perforation. Tumoral proliferation was observed originating from the submucosa and infiltrating the muscularis propria, with the features of mostly spindle-shaped, having round-shaped nuclei in some of the cells, and having relatively narrow cytoplasm. A panel of immunohistochemical stains were performed to rule out the possibilities of sarcoma, carcinoma, or melanoma. Diffuse strong positive reaction was observed for CD45, CD20, CD19, CD22, Pax5, and CD30. The case was reported as spindle cell variant of DLBCL based on the present findings. As far as we know, this is the first case described in the colon. We emphasize that pathologists should be reminded of lymphoma as a differential diagnosis of spindle cell tumors.

Gastrointestinal Kaposi Sarcoma Involving Stomach and Colon: Diagnostic Pitfall for Pathologists with Expression of CD117.

Kaposi sarcoma (KS) is a low-grade vascular tumor caused by human herpes virus type 8 (HHV8). Gastrointestinal involvement of KS is rare and most commonly clinically silent. Gastrointestinal KS may mimic gastrointestinal stromal tumors (GISTs) histologically as the tumor formed by morphologically spindle-shaped cells, which is mostly located in the mucosa and submucosa. In the present study, we describe a case of Kaposi sarcoma that was first diagnosed in the gastrointestinal tract of a 73-year-old female patient who presented to the clinic with nausea and diarrhea. Immunohistochemical staining showed cytoplasmic CD117 expression both in stomach and colon biopsies. Although involvement of KS is rarely seen in the gastrointestinal tract (GIT), the differential diagnosis of low-grade spindle cell lesions without significant pleomorphism, KS should definitely be considered, and it should be known that CD117 positivity is also present in these neoplasms.

Therapeutic effect of alendronate in an experimental temporomandibular joint osteoarthritis.

BACKGROUND: Temporomandibular joint osteoarthritis is a common degenerative joint disease. This disease negatively affects the daily life, speech and chewing functions of patients. OBJECTIVE: This study aimed to evaluate the effects of intra-articular injection of alendronate to osteoarthritis, which has a protective effect on bone and cartilage tissue and helps reduce inflammation in temporomandibular joint osteoarthritis. METHODS: A total of 24 Wistar albino rats were used in the study. Rats were divided into four groups: study, saline, control and sham. In both saline and control groups, monosodium iodoacetate was injected intra-articularly to induce osteoarthritis. Alendronate was administered intra-articularly to the study group weekly for 4 weeks. In the saline group, saline was administered by intra-articular injection. At the end of the 12th week, all groups were sacrificed. Mandibular condyle tissues were examined histopathologically. RESULTS: According to the results, osteoarthritic changes in the control group were higher than those in the study group (p < .05). No significant reduction in osteoarthritic changes was observed in the saline group (p > .05). Significant osteoarthritis findings were observed in all groups compared with the sham group (p < .05). CONCLUSION: Intra-articular injection of alendronate was found to have positive results on TMJ osteoarthritis. In addition, it was seen that alendronate has effects on reducing cartilage tissue degeneration and loss of matrix proteins.

The effects of metformin, pioglitazone, exenatide and exercise on fatty liver in obese diabetic rats: the role of IRS-1 and SOCS-3 molecules.

BACKGROUND: Obesity-induced inflammation mechanism is seen as a mechanism that may be the cause of insulin resistance and non-alcoholic fatty liver disease (NAFLD). Pathological destruction of insulin signaling molecules such as insulin receptor substrate proteins (IRS), especially due to the increase of cytokine signal suppressors (SOCS), has been demonstrated in experimental diabetes. The aim of this study was to determine the effects of metformin, pioglitazone, exenatide and exercise treatments used in type 2 diabetes on fatty liver and the role of Irs-1 and Socs3 molecules in this process in obese diabetic rats. METHODS: The study was conducted on 48 Wistar albino adult male rats weighing 180-220 g and randomly divided into 6 groups. The obese rat model with fatty liver was formed with a 60% fat diet for 4 weeks. Afterwards, drug treatment with metformin (Ob + D + M), pioglitazone (Ob + D + P), exenatide (Ob + D + ExA)) or exercise (Ob + D + ExE) was applied for 4 weeks to these obese groups, in which diabetes was induced by streptozocin (STZ). At the end of the experimental protocol, liver tissue samples were taken from all rat groups and histopathological and genetic analyses were performed. RESULTS: The mean steatosis degrees of the Ob + D + ExA and Ob + D + ExE groups were statistically significantly decreased compared to the obese diabetic group (p < 0.001). The group with the lowest mean steatosis grade was the Ob + D + ExE. Decrease in SOCS-3 expression was significant in Ob + D + M and Ob + D + P groups than other groups (p < 0.05). Mean staining intensities of Ob + D + Ex group, Ob + D + ExE group and Ob + D + P group according to IRS-1 expression statistically significantly increased compared to obese diabetic group (p < 0.05). Average staining intensity of Ob + D + ExE group according to IRS-1 expression was significant than other groups. CONCLUSION: Exercise and exenatide treatments seemed to be the prominent treatment methods by showing a statistically significant effect in decreasing the degree of steatosis, decreasing the Socs3 expression level and increasing the Irs-1 expression level.

Identification of autophagy-associated miRNA signature for the cervical squamous cell cancer and high-grade cervical intraepithelial lesions.

Cervical cancer markedly threatens women's health worldwide and currently ranks fourth leading cause of cancer mortality in women according to recent global cancer statistics. Recent advances have proven that not only tumor suppressor and oncogenes but also non-coding RNAs including micro RNAs (miRNAs) have significant impact in the development and progression of cervical cancers. Previous studies have identified many cancer-specific miRNAs for the early detection of cervical cancers. However, the diagnostic and prognostic use of autophagy-associated miRNAs for the cervical squamous cell cancer (SCC) cases and high-grade squamous intraepithelial lesion (HSIL) have not been uncovered. In the present study, we revealed that miRNAs are differentially expressed in both cervical SCC and HSIL. A total of 35 HSIL, 35 cervical SCC and 30 healthy controls were enrolled for the present study. Total RNA including miRNAs were isolated from the FFPE tissue samples and miRNA expression levels were quantified by quantitative PCR. Predicted miRNA targets of autophagy related genes were determined using miRNA-target prediction algorithms. MiR-143, miR-372, miR-375 and miR-30c were markedly downregulated in HSIL and cervical SCC. MiR-130a was significantly upregulated in the cervical SCC group compared to HSIL and control groups. MiR-30a, miR-520e, miR-548c and miR-372 were significantly associated with the overall survival of cervical SCC patients and these miRNAs were determined to be significant diagnostic markers as revealed by ROC analysis. Together, these results indicate that autophagy-associated miRNAs are potentially valuable for the differential diagnosis and targeted therapy to cervical cancer.

Metformin reduces ovarian ischemia reperfusion injury in rats by improving oxidative/nitrosative stress.

OBJECTIVE: To assess the preventive role of metformin on rat ovarian ischemia reperfusion injury. MATERIALS AND METHODS: Forty rats were divided equally into five groups; Group 1: sham, Group 2: surgical control with 3-hr torsion and detorsion, Group 3: 50 mg/kg p.o. metformin 30 min before 3-hr torsion, Group 4; metformin just after detorsion, Group 5; metformin 30 min before torsion and just after detorsion. Bilateral ovaries and blood sample were obtained seven days after detorsion for biochemical and histopathological evaluation. RESULTS: Ovarian tissue total anti-oxidant status (TAS) levels were significantly increased in group 4 when compared to group 1, 2 and 3 (all p < 0.01). In addition, there was a significant decrease in tissue oxidative stress index (OSI) level in group 4 with respect to group 2 (p < 0.01). Moreover, serum levels of OSI were significantly higher in group 2 with respect to group 1 and 5 (both p < 0.05). Similarly, there was significant increase in serum levels of peroxynitrite in group 2 as compared to serum levels in group 3 and 5 (p < 0.01 and 0.05, respectively). Furthermore, there were significant decrease in histopathological scores metformin and sham groups when compared to rats in the control group (Group 2). CONCLUSION: Metformin reduces ischemia reperfusion injury in rat torsion detorsion model by improving histopathological and biochemical findings including TAS, OSI and peroxynitrite.

The effect of tramadol on oxidative stress total antioxidant levels in rats with renal ischemia-reperfusion injury.

OBJECTIVE: To evaluate the protective effect of tramadol on renal tissue in rats with induced renal ischemia-reperfusion injury (I/R injury), and its effects on oxidative stress. MATERIAL AND METHODS: Thirty adult, male Wistar rats weighing 250-300 g were selected as subjects. Rats were randomized into 3 groups: group 1, sham; group 2, renal I/R injury; and group 3, renal I/R+Tramadol. In order to obtain ischemia in groups 2 and 3, renal artery was clamped for 1 h. Total oxidant status (TOS) and total antioxidant capacity (TAC) were analyzed using biochemical assays in the serum samples. RESULTS: TOS values were measured as 1.68±0.4 in group 1, 3.35±1.0 in group 2, and 3.49±0.9 in group 3. When group 1 was compared with group 2 and group 3, the TOS values of group 1 were significantly lower (p<0.05), whereas there was no difference between group 2 and group 3 (p>0.05). TAC values were measured as 1.65±1.4 in group 1, 1.85±0.1 in group 2, and 2.79±0.6 in group 3. The antioxidant status of group 1 was not significantly different from that of group 2 (p>0.05), whereas there was a significant difference between group 1 and group 3 (p>0.05). CONCLUSIONS: Tramadol has positive effects on antioxidant levels in renal I/R injury. We think that tramadol may be used in patients who underwent renal surgery and have I/R injury risk. There is a need for studies on this subject including human series.

Melatonin attenuates ovarian ischemia reperfusion injury in rats by decreasing oxidative stress index and peroxynitrite

Background/aim: To evaluate the protective effect of melatonin on ovarian ischemia reperfusion injury in a rat model. Materials and methods: Forty-eight rats were separated equally into 6 groups. Group 1: sham; Group 2: surgical control with 3-h bilateral ovarian torsion and detorsion; Group 3: intraperitoneal 5% ethanol (1 mL) just after detorsion (as melatonin was dissolved in ethanol); Group 4: 10 mg/kg intraperitoneal melatonin 30 min before 3-h torsion; Group 5:10 mg/kg intraperitoneal melatonin just after detorsion; Group 6:10 mg/kg intraperitoneal melatonin 30 min before torsion and just after detorsion. Both ovaries and blood samples were obtained 7 days after detorsion for histopathological and biochemical analysis. Results: In Group 1, serum levels of total oxidant status (TOS) (µmol H2O2 equivalent/g wet tissue)were significantly lower than in Group2 (P = 0.0023), while tissue TOS levels were lower than in Group 3 (P = 0.0030). Similarly, serum and tissue levels of peroxynitrite in Group 6were significantly lower than those ofGroup 2 (P = 0.0023 and P = 0.040, respectively). Moreover, serum oxidative stress index (OSI) (arbitrary unit) levels were significantly increased in Group 2 when compared to groups 1 and 6 (P = 0.0023 and P= 0.0016, respectively) and in Group 3 with respect to groups 1, 4, 5, and 6 (P = 0.0023, P = 0.0026, P = 0.0008, and P = 0.0011, respectively). Furthermore, there was a significant decrease in histopathological scores including follicular degeneration, vascular congestion, hemorrhage, and inflammation in the melatonin and sham groups in comparison with control groups. Additionally, primordial follicle count was significantly higher in Group 6 than in Group 2 (P = 0.0002). Conclusion: Melatonin attenuates ischemia reperfusion damage in a rat torsion/detorsion model by improving histopathological and biochemical findings including OSI and peroxynitrite.

Identification of microRNA expression signature for the diagnosis and prognosis of cervical squamous cell carcinoma.

Cervical cancer is the fourth leading cause of cancer death among women globally. The prognosis of cervical cancer patients differs considerably, and clinical outcomes are difficult to predict. Given the significant roles of miRNAs in human cancers, identification of novel and reliable miRNA biomarkers is important for targeted cervical cancer therapy. In the present study, we aimed to reveal biological significance of miR-200a, miR-423, miR-34a, miR-193a, and miR-455 for the prognosis and diagnosis of cervical cancer and their association with the clinical outcomes of patients. Distinct expression profiles of miRNAs in formalin-fixed paraffin-embedded tissue samples of patients and healthy controls were evaluated using qRT-PCR. We identified miR-200a, miR-455, and miR-34a were significantly downregulated in cervical squamous cell carcinoma tissues compared to normal cervix tissue from healthy controls. Both miR-455 and miR-34a confer a promising diagnostic factor for the cervical cancer while miR-200a showed no significance in ROC analysis. Notably, low expression of miR-34a was markedly associated with the poor overall survival of cervical cancer patients as revealed by Kaplan-Meier survival analysis. Also, univariate and multivariate analysis indicated miR-34a expression as an independent prognostic factor. Consequently, our results underline the importance of distinct expression miRNAs in cervical squamous cell carcinoma.

Octreotide and lanreotide decrease ovarian ischemia-reperfusion injury in rats by improving oxidative and nitrosative stress.

AIM: To investigate the protective effect of octreotide and lanreotide on ovarian damage in experimental ovarian ischemia-reperfusion injury. METHODS: Fifty-six rats were separated into seven groups; group 1: sham group, group 2: surgical control group with 3-h torsion and detorsion, group 3: 0.02 mg/kg s.c. octreotide 30 min before 3-h torsion, group 4; octreotide just after detorsion for 7 days, group 5: octreotide 30 min before torsion and just after detorsion for 7 days, group 6: single time 20 mg/kg s.c. lanreotide before torsion, group 7: single time lanreotide just after detorsion. RESULTS: All histopathological scores except congestion were significantly lower in group 1 than other groups. In addition, hemorrhage (group 2 vs 4: P < 0.05), degeneration (group 2 vs 4: P < 0.05, group 2 vs 5: P < 0.01 and group 2 vs 6: P < 0.05) and total damage score (group 2 vs 4: P < 0.05, group 2 vs 5: P < 0.05, group 2 vs 6: P < 0.05 and group 2 vs 7: P < 0.05) were significantly lower than other groups. Moreover, ovarian tissue total oxidant status and oxidative stress index levels were significantly decreased in groups 5 (both P < 0.05) and 7 (both P < 0.05) when compared to group 2. Furthermore, tissue levels of peroxynitrite were significantly higher in group 2 than groups 1, 3 and 5 (all P < 0.05). CONCLUSIONS: Octreotide and lanreotide have a protective role against ischemia-reperfusion damage in rat torsion detorsion model by improving histopathological and biochemical findings including tissue levels of total oxidant status, oxidative stress index and peroxynitrite.

Histology of the normal ovary in premenopausal patients.

Detailed descriptions of ovarian histology are rare. We reviewed in detail 57 cases of normal ovaries in premenopausal patients, when the ovaries are active and primordial follicles are found. We also proposed updated definitions to more clearly distinguish inclusion cysts, which do not have a known relationship with any disease process, from endosalpingiosis, a lesion closely associated with low grade serous neoplasia of the ovary. The most interesting findings were the significant variation in the histologic features including the variation in the amount and the distribution of primordial follicles, follicular cysts, and endosalpingiosis, within the ovary and between both ovaries in the same patient, the frequent presence of primordial follicles in the medulla, specifically in cases of multiple follicular cysts, and the frequent presence of endosalpingiosis. We believe that to confirm a pathologic process in the ovary, we need to become familiar with the histologic features of the normal ovary and their variations.

Subgroup analysis of accreta, increta and percreta cases using acoustic radiation force impulse elastography.

OBJECTIVE: To compare acoustic radiation force impulse (ARFI) elastography values and histopathological diagnoses (accreta, increta, percreta) in patients suspected of having abnormal placental invasion (API). MATERIALS AND METHODS: This prospective study included 54 patients in the third trimester with a history of caesarian section (CS) and API based on gray scale and Doppler ultrasonography (USG) and 35 healthy controls. Patients underwent ARFI elastography preoperatively. Elastography measurements of the fetal and maternal sides of the placenta were compared to histopathology. RESULTS: Patients had higher maternal-side, fetal-side and average elastography values (P = 0.001). Intraoperatively, eight patients (14.8%) showed abnormal cervical canal invasion and 46 (85.2%) bladder and/or parametrial invasion. Eight patients underwent CS + placental-bed suture, 11 CS + excision of the lower segment, and 35 caesarean-hysterectomy. Histopathology of lower segment excision/caesarian-hysterectomy patients determined 10 (21.7%) accreta, 10 (21.7%) increta and 26 (56.6%) percreta cases. ARFI values were highest in the percreta subgroup. The increta subgroup showed higher ARFI values than the accreta subgroup but maternal-side, fetal-side and average ARFI values were not significantly different across the subgroups (P > 0.05). The cut-off values for average, peripheral and central elastography were determined as >0.90, >0.76, >0.98 (m/s) with sensitivities of 98, 64, 98% and specificities of 85, 80, 91%, respectively. CONCLUSION: ARFI elastography can detect API. However, it cannot determine invasion depth reliably. More studies with subgroup analyses are warranted to reveal its usefulness for invasion depth.

Correction to: Monoclonal Caveolin 1 Expression in the Differential Diagnosis of Malignant Pleural Mesothelioma and Pulmonary Adenocarcinoma: Is it Useful?

The original version of this article unfortunately contained an error in Fig. 1. Cav-1 expression in MPM and PA cases failed to show the histopathological details in Fig. 1 due to technical problem. The figure with the proper sharpness and clarity is shown in the next page.

Monoclonal Caveolin 1 Expression in the Differential Diagnosis of Malignant Pleural Mesothelioma and Pulmonary Adenocarcinoma: Is it Useful?

In this study we aim to demonstrate the value of monoclonal Caveolin 1 expression in distinguishing between malignant pleural mesothelioma and pulmonary adenocarcinoma. Total of 129 cases, consisting of 68 cases of malignant pleural mesothelioma (51 epitheloid, 12 biphasic, and 5 sarcomatoid type) and 61 cases of pulmonary adenocarcinoma were examined and stained with monoclonal Caveolin-1. Caveolin 1 expression with a membranous and /or cytoplasmic pattern was detected only in 32.35% (n:22/68) of malignant pleural mesothelioma and 6.5% (n:4/61) of pulmonary adenocarcinoma cases. This finding suggests that the choice of poly/monoclonal antibody for Caveolin 1 in the differential diagnosis of malignant pleural mesothelioma and pulmonary adenocarcinoma is important.

Immunohistochemical evaluation of Cajal-like cells and Caveolin-1 levels at ureteropelvic junction obstruction. / Evaluación inmunohistoquímica de las células de Cajal-like y los niveles de Caveolina-1 en la obstrucción de la unión pieloureteral.

OBJECTIVE: To compare c-kit-positive interstitial Cajal-like cells (ICC) and Caveolin-1 protein levels as a pacemaker and signaling molecules, on ureteropelvic junction (UPJ) specimens, between two groups of pediatric patients with and without ureteropelvic junction obstruction (UPJO). METHODS: We evaluated the UPJ specimens of 45 pediatric patients operated between 2005- 2012 retrospectively. Group 1 included 37 patients who underwent dismembered pyeloplasty due to UPJO. Eight patients underwent nephrectomy by the other reasons (renal tumor, trauma etc) and had normal UPJ were accepted as Group 2. The specimens were examined immunohistochemically with CD117 and Caveolin-1 antibody. According to the total number of ICC; 0-5 cells were accepted as a few (1), 610 cells as moderate (2), and > 10 as many (3). According to the staining intensity of Caveolin-1 at muscle tissue, a subjective evaluation was performed as; mild staining (1), moderate staining (2) and strong staining (3). RESULTS: The mean value of ICC distribution was calculated 1.37 ± 0.54 in Group 1 and 2.13 ± 0.64 in Group 2 (p = 0.003), and the median value of ICC distribution was found 1 [1-3] in Group 1 and 2 [1-3] in Group 2 (p = 0.008). Median values for the intensity of staining with Caveolin-1 were found 2 [1-3] in the Group 1, and 2.5 [2-3] in the Group 2 (p = 0.025). CONCLUSIONS: A decrease in ICC and Caveolin-1 levels support that there may be a relationship between ICC and Caveolin-1 for UPJO associated with signal transduction and peristalsis in urinary system.

OBJETIVO: Comparar las células intersticiales Cajal-like, c-kit positivas, y los niveles de proteína Caveolina -1 como marcapasos y moléculas señalizadoras en piezas de unión pieloureteral (UPU) comparando dos grupos de pacientes pediátricos con o sin obstrucción de la UPU.MÉTODOS: Evaluamos retrospectivamente las piezas obtenidas en la operación de 45 pacientes pediátricos entre 2005-2012. El grupo 1 incluía 37 pacientes sometidos a pieloplastia desmembrada por estenosis de UPU. Ocho pacientes que fueron sometidos a nefrectomía por otras razones (tumor renal, traumatismo, etc) y tenían una UPU normal se incluyeron en el grupo 2. Las piezas fueron examinadas mediante inmunohistoquímica con CD117 y Caveolina-1 en el tejido muscular. Se realizó una evaluación subjetiva como: tinción leve (1), tinción moderada (2) y tinción fuerte (3). RESULTADOS: Se calculó el valor medio de la distribución de las células intersticiales de Cajal (CIC), 1,37 ± 0,54 en el Grupo 1 y 2,13 ± 0,64 en el Grupo 2 (p = 0,003), y la mediana, de 1 [1-3] en el Grupo 1 y 2 [1-3] en el Grupo 2 (p = 0,008). Los valores de la mediana para la intensidad de la tinción con Caveolina- 1 fueron de 2 [1-3] en el Grupo 1 y 2,5 [2-3] en el Grupo 2 (p = 0,025). CONCLUSIONES: Una disminución de las células intersticiales de Cajal y los niveles de Caveolina 1 apoyan que puede haber una relación entre las células intersticiales de Cajal y la Caveolina 1 en la estenosis de la UPU asociada con la transducción de la señal y el peristaltismo en el sistema urinario.

Immunohistochemical evaluation of cajal-like cells and caveolin-1 levels at ureteropelvic junction obstruction / Evaluación inmunohistoquímica de las células de Cajal-like y los niveles de Caveolina-1 en la obstrucción de la unión pieloureteral

Objective: To compare c-kit-positive interstitial Cajal-like cells (ICC) and Caveolin-1 protein levels as a pacemaker and signaling molecules, on ureteropelvic junction (UPJ) specimens, between two groups of pediatric patients with and without ureteropelvic junction obstruction (UPJO). Methods: We evaluated the UPJ specimens of 45 pediatric patients operated between 2005- 2012 retrospectively. Group 1 included 37 patients who underwent dismembered pyeloplasty due to UPJO. Eight patients underwent nephrectomy by the other reasons (renal tumor, trauma etc) and had normal UPJ were accepted as Group 2. The specimens were examined immunohistochemically with CD117 and Caveolin-1 antibody. According to the total number of ICC; 0-5 cells were accepted as a few (1), 610 cells as moderate (2), and >10 as many (3). According to the staining intensity of Caveolin-1 at muscle tissue, a subjective evaluation was performed as; mild staining (1), moderate staining (2) and strong staining (3). Results: The mean value of ICC distribution was calculated 1.37 ± 0.54 in Group 1 and 2.13 ± 0.64 in Group 2 (p=0.003), and the median value of ICC distribution was found 1 [1-3] in Group 1 and 2 [1-3] in Group 2 (p=0.008). Median values for the intensity of staining with Caveolin-1 were found 2 [1-3] in the Group 1, and 2.5 [2-3] in the Group 2 (p=0.025).Conclusions: A decrease in ICC and Caveolin-1 levels support that there may be a relationship between ICC and Caveolin-1 for UPJO associated with signal transduction and peristalsis in urinary system

Objetivo: El cáncer de próstata (CP) es el tumor maligno más frecuente en el varón y solo puede confirmarse después de una biopsia de próstata (BP). La BP guiada por ecografía con 10-12 muestras es actualmente el patrón de referencia en diagnóstico primario de CP, y presenta claras ventajas en términos de tasas de detección de CP clínicamente significativo, concordancia de la anatomía patológica, y valores predictivos positivo y negativo en comparación con la clásica biopsia sextante previa. La sospecha clínica persistente de CP con biopsias previas negativas es un desafio, en el que disponemos de varios marcadores séricos y urinarios, así como técnicas de imagen, que buscan ayudar en el manejo óptimo de estos pacientes. Actualmente, los métodos más aceptados y utilizados en la práctica clínica para reducir el número de BP innecesarias en este subgrupo de pacientes son el PCA3 (Antígeno de cáncer de próstata 3) y la RMN multiparamétrica (RMNmp). Estos métodos han mostrado que mejoran la precisión diagnóstica de la rebiopsia de próstata, pero todavía no hay guías claras definiendo cual es la estrategia óptima en este escenario. Se han propuesto nuevos biomarcadores en los últimos años con el objetivo de aumentar la especificidad y distinguir entre CP agresivo y no agresivo, destacando el papel emergente del índice de salud prostática (PHI Prostate health index9 y de la puntuación 4 K (4 Kalicreinas). El objetivo de esta revisión es demostrar la evolución del estándar actual de BP guiada por ecografía de 10- 12 muestras, las indicaciones y controversias en relación con las biopsias repetidas y la exploración de datos en relación con el rol potencial de los métodos predominantes que afectan a la decisión de repetir biopsia -- PCA3 y RMNmp--, así como los nuevos biomarcadores de CP utilizados en la práctica clínica (PHI y puntuación 4K)

The re-awakening of hCG expression. Its role in the diagnosis of cervical squamous cell carcinoma.

OBJECTIVES: To compare immunohistochemical detection of Human chorionic gonadotropin (hCG) expression in paraffin embedded tissue of squamous cell carcinomas (SCC) and high grade squamous intraepithelial lesions (HSIL). METHODS: The samples in this retrospective study were obtained from the archives of the Pathology Department at Gaziantep University, Gaziantep, Turkey, over the period from January 2012 to September 2016. The study group consisted of 55 cases of SCC and 45 cases of HSIL. Tissue expression of hCG was detected by specific binding of anti-hCG antibody using an automated immunohistochemistry staining device. The categorical variables of intensity and coverage were analyzed statistically using Pearson Chi-Square test. RESULTS: High grade squamous cell lesions cases showed weak (84.4%, n=38/45) to no (15.6%, n=7/45) staining for hCG. None of the HSIL cases showed strong positivity. Strong positivity for hCG was detected in 90.9% (n=50/55) of SCC cases. CONCLUSION: Our study supports the association of ectopic hCG expression in cancer pathogenesis by demonstrating strong hCG immunoreactivity only in SCC cases. This finding can be helpful in supporting the diagnosis of invasive carcinoma in small or fragmented biopsies, which can on their own be confusing for the pathologists.