Multi-drug Resistant Acinetobacter baumannii: Phenotypic and Genotypic Resistance Profiles and the Associated Risk Factors in Teaching Hospital in Jordan.

BACKGROUND: This study aimed to determine the prevalence of Antimicrobial Resistance Genes (ARGs), with a focus on colistin resistance in clinical A. baumannii, as well as the risk factors associated with A. baumannii infection in Jordanian patients. METHODS: In total, 150 A. baumannii isolates were obtained from patients at a teaching hospital. The isolates were tested for antimicrobial susceptibility using disc diffusion and microdilution methods. PCR amplification was used to detect ARGs, and statistical analysis was conducted to evaluate the influence of identified risk factors on the ARGs acquisition. RESULTS: More than 90% of A. baumannii isolates were resistant to monobactam, carbapenem, cephalosporins, Fluoroquinolones, penicillin, and ß-lactam agents. Moreover, 20.6% of the isolates (n = 31) were colistin-resistant. Several ARGs were also detected in A. baumannii isolates. Univariate analysis indicated that risk factors and the carriage of ARGs were significantly associated P ≤ (0.05) with gender, invasive devices, immunodeficiency, systemic diseases, tumors, and covid-19. Logistic regression analysis indicated seven risk factors, and three protective factors were associated with the ARGs (armA, strA, and strB) P ≤ (0.05). In contrast, tetB and TEM were associated with 2 risk factors each P ≤ (0.05). CONCLUSION: Our study indicates a high prevalence of MDR A. baumannii infections in ICU patients, as well as describing the case of colistin-resistant A. baumannii for the first time in Jordan. Additionally, the risk factors associated with ARGs-producing A. baumannii infections among ICU patients suggest a rapid emergence and spread of MDR A. baumannii without adequate surveillance and control measures.

The role of NMDA glutamate receptors in lung injury caused by chronic long-term intermittent hypobaric hypoxia.

Chronic intermittent hypoxia (CIH), a component of sleep apnea-hypopnea syndrome, is suggested to cause damage to lung tissue, and the role of glutamate is not well studied. We used a chronic long-term intermittent hypobaric hypoxia (CLTIHH) model of rats to find out if such procedure causes lung injury and the potential effect of N-methyl-D-aspartate receptors (NMDARs) by using receptor antagonist MK-801 (dizocilpine). Thirty-two rats were placed into four groups; a control and three CLTIHH groups where rats were placed into a low-pressure chamber set to 430 mmHg for 5 h/day, 5 days/week, for 5 weeks. Only one group received MK-801 (0.3 mg/kg, ip) daily. We evaluated tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, and nuclear factor (NF)-kB for the inflammatory process, superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT), glutathione peroxidase (GPX), total antioxidant status (TAS), and total oxidant status (TOS) for oxidative stress, and caspase-9 levels. Blood plasma, bronchoalveolar fluid (BALF), and lung tissue extracts were evaluated. Both oxidant and inflammatory parameters were significantly increased in all the mediums of the CLTIHH groups except the group that received MK-801. Significant evidence was collected on MK-801 alleviating the effect of CLTIHH. Histological evaluations revealed lung damage and fibrotic changes in the CLTIHH groups. It was first shown that the CLTIHH procedure caused chronic lung injury, and that inflammation and oxidant stress were influential in the formation of lung injury. Secondly, NMDAR antagonist MK-801 effectively inhibited the development of lung injury and fibrosis.

The role of NMDA glutamate receptors in lung injury caused by chronic long-term intermittent hypobaric hypoxia

Chronic intermittent hypoxia (CIH), a component of sleep apnea-hypopnea syndrome, is suggested to cause damage to lung tissue, and the role of glutamate is not well studied. We used a chronic long-term intermittent hypobaric hypoxia (CLTIHH) model of rats to find out if such procedure causes lung injury and the potential effect of N-methyl-D-aspartate receptors (NMDARs) by using receptor antagonist MK-801 (dizocilpine). Thirty-two rats were placed into four groups; a control and three CLTIHH groups where rats were placed into a low-pressure chamber set to 430 mmHg for 5 h/day, 5 days/week, for 5 weeks. Only one group received MK-801 (0.3 mg/kg, ip) daily. We evaluated tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, and nuclear factor (NF)-kB for the inflammatory process, superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT), glutathione peroxidase (GPX), total antioxidant status (TAS), and total oxidant status (TOS) for oxidative stress, and caspase-9 levels. Blood plasma, bronchoalveolar fluid (BALF), and lung tissue extracts were evaluated. Both oxidant and inflammatory parameters were significantly increased in all the mediums of the CLTIHH groups except the group that received MK-801. Significant evidence was collected on MK-801 alleviating the effect of CLTIHH. Histological evaluations revealed lung damage and fibrotic changes in the CLTIHH groups. It was first shown that the CLTIHH procedure caused chronic lung injury, and that inflammation and oxidant stress were influential in the formation of lung injury. Secondly, NMDAR antagonist MK-801 effectively inhibited the development of lung injury and fibrosis.

HER2-positive apocrine carcinoma of the breast: a population-based analysis of treatment and outcome.

PURPOSE: Apocrine carcinoma of the breast (APO) expresses HER2 in 30-50% of cases. This study explored the clinicopathological features and outcome of HER2+/APO and matched HER2+/NST cohort. METHODS: We used the SEER database to explore the cohorts. Univariate and multivariate analyses were used to assess the survival. Based on ER and PR [steroid receptors/SR/] and HER2 status, we divided the cohorts to match the intrinsic molecular subtypes for comparisons. RESULTS: We retrieved 259 cases of HER2+/APO. Most HER2+/APO were SR negative (65%). HER2+/APO were more prevalent in the 80+ age group (24.7% vs. 15.7%, p < 0.001). HER2+/SR-/APO had a significantly lower histological grade than the HER2+/SR-/NST (p < 0.001). Breast cancer-related deaths were more prevalent in HER2+/NST (7.8% vs. 3.9%, p = 0.019). This was particularly evident between SR- subgroups (10.4% in HER2+/SR-/NST vs. 4.2% in HER2+/SR-/APO, p = 0.008) and was reaffirmed in breast cancer-specific survival in univariate analysis (p = 0.03). Other than race and SR status, HER2+/APO subgroups did not differ in clinicopathological parameters. CONCLUSIONS: Our study confirms the rarity of the APO and reveals that SR status in APO does not affect these patients' prognosis. HER2+/APO tumors tend to have a less aggressive phenotype and a more favorable outcome despite a markedly lower ER/PR positivity.

The concentration of androgen receptor and protein kinase A in male chicken following the administration of a combination of the epididymis and testicular extracts.

BACKGROUND AND AIM: Testis (T) and epididymis (E) are waste from the abattoir that is rarely used. In fact, both organs contain important chemicals needed for spermatogenesis (e.g., hormones, proteins, and other molecules). Therefore, administration of a combination of testis and epididymis (CTE) extracts may activate androgen receptors (AR) and protein kinase A (PKA) molecules that play a prominent role in spermatogenesis. We, therefore, aimed at investigating the influence of the CTE extracts on the concentration of AR and PKA in male chicken. MATERIALS AND METHODS: This study used a completely randomized design with four treatment groups (K0, K1, K2, and K3) and five replications per group. K0 is a control group that received 1 mL normal saline, whereas K1, K2, and K3 are the test groups that received 1, 2, and 3 mL of CET extracts, respectively. Twenty male chickens (strain: broiler Mb 89), 3 weeks of age, weighing 500-700 g were used. We administered the injections in a 13-day period and on the 14th day; we collected and processed blood samples as serum to measure the AR and PKA concentrations using commercial chicken AR and PKA enzyme-linked immunosorbent assay kits, respectively. We performed analyses by analysis of variance using SPSS 20.0. RESULTS: The AR concentrations in K1, K2, and K3 groups increased by 4.26%, 10.97%, and 28.04%, respectively, compared to the K0 (control group). However, this increase was not significantly different between the groups (p>0.05). Moreover, the PKA concentrations increased by 2.97%, 2.60%, and 4.08% in K1, K2, and K3 groups, respectively, compared to the control group. However, this increase was not significantly different between the groups as well (p>0.05). CONCLUSION: The CTE extracts tended to increase the AR and PKA concentrations even though it is not significant. Therefore, it needs further study when using the CTE extracts for spermatogenesis in male chicken.

High-Risk Human Papillomaviruses and Epstein-Barr Virus in Colorectal Cancer and Their Association with Clinicopathological Status.

Colorectal cancer (CRC) is a common malignancy with a high mortality rate worldwide. It is a complex, multifactorial disease that is strongly impacted by both hereditary and environmental factors. The role of microbes (e.g., viruses) in the pathogenesis of CRC is poorly understood. In the current study, we explored the status of high-risk human papillomaviruses (HPV) and Epstein-Barr virus (EBV) in a well-defined CRC cohort using immunohistochemistry and polymerase chain reaction assays. Our data showed that high-risk HPVs were common (~80%) and EBV had a low presence (14-25%) in the CRC samples. The most common high-risk HPVs are HPV16, 31, 18, 51, 52 and 45 genotypes. The co-presence of high-risk HPV and EBV was observed in ~16% of the sample population without any significant association with the clinicopathological variables. We conclude that high-risk HPVs are very prevalent in CRC samples while EBV positivity is relatively low. The co-expression of the two viruses was observed in a minority of cases and without any correlation with the studied parameters. Further studies are necessary to confirm the clinical relevance and potential therapeutic (preventive) effects of the observations reported herein.

The concentration of testosterone, pituitary adenylate cyclase-activating polypeptide, and protamine 1 in the serum of male chicken following administration of epididymis and testicular extracts and their combination.

BAKCGROUND AND AIM: Testis and epididymis are male reproductive organs that play an important role in spermatogenesis. These two organs are rich in the content of hormones and other molecules needed in the process of spermatogenesis which affect the quality of the spermatozoa. The objective of this study was to examine the effect of the administration of epididymis and testicular extracts and their combination on testosterone, pituitary adenylate cyclase-activating polypeptide (PACAP), and protamine 1 (PRM1) concentrations in the serum of male chicken. MATERIALS AND METHODS: Twenty male chickens (broiler strain Cp707), aged 3 weeks and weighing 800-1000 g, were randomly divided into four different groups including a control group (T0) = injected with 1 ml normal saline and treatment groups: T1 = injected with 1 ml epididymis extract, T2 = injected with 1 ml testicular extract, and T3 = injected with a combination of 1 ml epididymis + 1 ml testicular extract. The experiment was conducted for 13 days and at the end of the study (day 14), the chickens were sacrificed to obtain the serum. Furthermore, the concentrations of testosterone, PACAP, and PRM1 were then measured by using an enzyme-linked immunosorbent assay technique. RESULTS: The concentrations of PACAP and PRM1 did not show a significant difference between treatment groups (T1, T2, and T3) and control group (T0) (p>0.05). However, the concentration of testosterone showed a significantly higher difference in a group injected with a combination of 1 ml epididymis and 1 ml testicular extracts (T3) compared to the control group (T0) (p<0.05). CONCLUSION: The administration of epididymis and testicular extracts and their combination did not affect the increase of PACAP and PRM1 concentration. However, a combination of these extracts significantly affects the increase of testosterone concentration in the serum of male chicken.

Effect of cell-phone radiofrequency on angiogenesis and cell invasion in human head and neck cancer cells.

BACKGROUND: Today, the cell phone is the most widespread technology globally. However, the outcome of cell-phone radiofrequency on head and neck cancer progression has not yet been explored. METHODS: The chorioallantoic membrane (CAM) and human head and neck cancer cell lines, FaDu and SCC25, were used to explore the outcome of cell-phone radiofrequency on angiogenesis, cell invasion, and colony formation of head and neck cancer cells, respectively. Western blot analysis was used to investigate the impact of the cell phone on the regulation of E-cadherin and Erk1/Erk2 genes. RESULTS: Our data revealed that cell-phone radiofrequency promotes angiogenesis of the CAM. In addition, the cell phone enhances cell invasion and colony formation of human head and neck cancer cells; this is accompanied by a downregulation of E-cadherin expression. More significantly, we found that the cell phone can activate Erk1/Erk2 in our experimental models. CONCLUSION: Our investigation reveals that cell-phone radiofrequency could enhance head and neck cancer by stimulating angiogenesis and cell invasion via Erk1/Erk2 activation.

Evaluation of topical Dexmedetomidine administration in postlaminectomy epidural fibrosis rat model.

Epidural fibrosis is a challenging topic in spinal surgery. Numerous clinical and experimental studies have been focused on this issue to clarify problems faced in spinal procedures for the patient as well as the surgeon and find out new methodologies. Dense cytokines and growth factors which are released from inflammatory cells have been suggested to play a major role in the inception and progression of fibrosis. One of the most investigated and important actor in epidural fibrosis is assumed to be the transforming growth factor-1ß (TGF-1ß) formation. Studies showed that Dexmedetomidine (DEX) downregulates TGF-ß pathway with its anti-inflammatory and antioxidant effects. From this point of view, for the first time in the literature we try to observe if there will be an effect of topical DEX administration over epidural fibrosis in a rat model. We hypothesized that DEX might have preventive effects on epidural fibrosis via anti-inflammatory and antioxidant effects. Twenty-four adult male Wistar albino rats were randomly assigned to three groups (Topical DEX, Spongostan, Laminectomy). A total laminectomy was performed at the L3-L5 level and then the ligamentum flavum and epidural fat tissue were cleared away from the surgical site. Histopathological assessment was performed postoperatively after 4 weeks. Our study revealed that topical DEX administration may have effects on reducing epidural fibrosis. Topical DEX administration may be helpful in preventing epidural fibrosis after laminectomy in rats through multiple anti-inflammatory and antioxidant mechanisms as well as through TGF -1ß pathway.

Effect of gestational diabetes mellitus on testis and pancreatic tissues of male offspring.

The purpose of this study was to determine the effect of gestational diabetes mellitus (GDM) on some reproductive characteristics, testicular and pancreatic oxidative status and pancreatic endocrine receptor densities of male offspring at post-pubertal stage. A total of 36 1-day-old Wistar Albino male offspring including 12 pups of nontreated mothers (control group), 14 pups of 40 mg/kg STZ-injected mothers (STZ-40 group) and 10 pups of 60 mg/kg STZ-injected mothers (STZ-60 group) were used. The offspring were euthanised on post-natal day 60, their blood, reproductive organs and pancreatic tissues were obtained and examined. When compared with the control group, there was a significant decrease in body and absolute reproductive organ weights, serum testosterone level, testicular and pancreatic catalase activities, pancreatic glutathione level, epididymal sperm concentration of both STZ-40 and STZ-60 groups as well as in testicular glutathione level of only STZ-60 group. Significant increases were determined in testicular and pancreatic malondialdehyde level and glutathione peroxidase activity in both groups and in fasting serum glucose of only STZ-60 group in comparison with the control group. Although some histopathological damages were observed in testes of both STZ-40 and STZ-60 groups, there were no detectable differences between the groups in density of insulin, glucagon and somatostatin receptors in pancreas. In conclusion, GDM has negative effects on reproductive efficiency and testicular-pancreatic tissue oxidant/antioxidant balance of male offspring at post-pubertal stage.

Factors that influence recurrent lumbar disc herniation.

INTRODUCTION: The most common cause of poor outcome following lumbar disc surgery is recurrent herniation. Recurrence has been noted in 5% to 15% of patients with surgically treated primary lumbar disc herniation. There have been many studies designed to determine the risk factors for recurrent lumbar disc herniation. In this study, we retrospectively analysed the influence of disc degeneration, endplate changes, surgical technique, and patient's clinical characteristics on recurrent lumbar disc herniation. METHODS: Patients who underwent primary single-level L4-L5 lumbar discectomy and who were reoperated on for recurrent L4-L5 disc herniation were retrospectively reviewed. All these operations were performed between August 2004 and September 2009 at the Neurosurgery Department of Ataturk Education and Research Hospital in Ankara, Turkey. RESULTS: During the study period, 126 patients were reviewed, with 101 patients underwent primary single-level L4-L5 lumbar discectomy and 25 patients were reoperated on for recurrent L4-L5 disc herniation. Preoperative higher intervertebral disc height (P<0.001) and higher body mass index (P=0.042) might be risk factors for recurrence. Modic endplate changes were statistically significantly greater in the recurrent group than in the non-recurrent group (P=0.032). CONCLUSION: Our study suggests that patients who had recurrent lumbar disc herniation had preoperative higher disc height and higher body mass index. Modic endplate changes had a higher tendency for recurrence of lumbar disc herniation. Well-planned and well-conducted large-scale prospective cohort studies are needed to confirm this and enable convenient treatment modalities to prevent recurrent disc pathology.

Effects of lowered dialysate sodium on left ventricle function and brain natriuretic peptide in maintenance of hemodialysis patients.

INTRODUCTION: Impaired diastolic flow is characterized by decreased left ventricular (LV) filling diastole, abnormal LV distensibility, or delayed relaxation. B-Type natriuretic peptide (BNP) is an indicator of various cardiovascular diseases and body volume status. The aim of this study was to determine whether the lowering of dialysate sodium (Na) levels is effective on LV systolic and diastolic parameters and BNP in the maintenance of hemodialysis patients. MATERIALS AND METHODS: The study included 49 chronic hemodialysis patients. Left atrium (LA) diameter and LV ejection fraction, LV systolic and diastolic diameter, deceleration time (DT), pulmonary artery pressure (PAP), inferior vena cava diameter (IVCD), early diastolic transmitral flow ( E) and late diastolic transmitral flow ( A) velocities, E/ A ratio, isovolumic relaxation time, peak early diastolic velocity ( E'), late diastolic velocity ( A') of tissue Doppler mitral annulus, and flow propagation velocity of mitral inflow ( Vp) were measured before and 6 months after hemodialysis with low Na dialysate. RESULTS: Six months after low Na hemodialysis, a decrease was observed in echocardiographic parameters such as PAP and IVCD ( p < 0.05, p < 0.001, and p < 0.001, respectively). However, a significant difference was not observed in LA diameter. In LV diastolic measurement of E and A waves, E/ A ratio, DT, Vp, septal E' and A', and lateral E' and A' exhibited significant improvement by low Na HD. BNP level was significantly reduced ( p < 0.001). CONCLUSIONS: Lowered dialysate Na concentration improves PAP, IVCD, and LV diastolic properties assessed by mitral inflow filling, tissue Doppler velocity, and mitral inflow velocity propagation.

Detection of left atrial dysfunction with speckle tracking echocardiography.

BACKGROUND: The aim of this study was to evaluate the relationship between the SYNTAX (Synergy Between PCI With Taxus and Cardiac Surgery) score and left ventricular end-diastolic pressure (LVEDP) measured with an invasive method and with speckle-tracking echocardiography (STE). METHODS: The study included 124 patients who underwent cardiac catheterization. LVEDP values and coronary images were obtained for all patients. SYNTAX scores were calculated and separated into three tertiles (SYNTAX = 0, SYNTAX < 22, and SYNTAX > 22). Standard echocardiography and STE were performed on all the patients. Peak LA strain (LAs strain) in ventricular end-systole and LA strain during LA contraction (LAa strain) values were obtained with STE. RESULTS: In univariate analysis, a strong correlation was observed between the SYNTAX score and LAs strain and a moderate correlation with LAa strain. A moderate correlation was also found between both LAs strain and LAa strain and LVEDP. In multiple regression analysis, LAs strain and LVEDP were observed to be independent predictors of SYNTAX score. CONCLUSION: LAs strain and LVEDP were observed to be independent predictors of SYNTAX scores. The relationship between LAs strain, LVEDP, and SYNTAX score could be useful in clinical practice.

Real-life use of digoxin in patients with non-valvular atrial fibrillation: data from the RAMSES study.

WHAT IS KNOWN AND OBJECTIVE: Although inappropriate use of digoxin has been described in various populations, a real-world evaluation of patterns of digoxin prescription has not been well studied in patients with atrial fibrillation (AF). The aim of this study was to identify prevalence, indications and appropriateness of digoxin use in the general population of patients with non-valvular AF (NVAF) in Turkey. METHODS: We included and classified patients from the RAMSES (ReAl-life Multicentre Survey Evaluating Stroke prevention strategies in Turkey) study, a prospective registry including 6273 patients with NVAF, on the basis of digoxin use. After excluding the data of 73 patients whose medical history about digoxin use or left ventricle function was absent, 6200 patients were included for the final analysis. Digoxin use was considered inappropriate if patients did not have left ventricular systolic dysfunction or symptomatic heart failure (HF). RESULTS AND DISCUSSION: Digoxin was used in 1274 (20·5%) patients. Patients treated with digoxin were older (71·4 ± 9·8 years vs. 69·2 ± 10·9 years, P < 0·001), more likely to be female (58·8% vs. 55·9%, P = 0·019) and had more common comorbidities such as HF (40·2% vs. 17·4%), diabetes (26·4% vs. 21·1%), coronary artery disease (35·3 vs. 27·6%) and persistent/permanent AF (93·4% vs. 78·4%; P < 0·001 for each comparison). Of the 1274 patients, the indication of digoxin use was considered inappropriate in 762 (59·8%). WHAT IS NEW AND CONCLUSION: Our findings show that nearly one-fifth of the patients with NVAF were on digoxin therapy and nearly 60% of these patients were receiving digoxin with inappropriate indications in a real-world setting.

Does vitamin D have any role in the improvement of diabetic peripheral neuropathy in type 1 diabetic patients?

AIM: The aim of this study was to evaluate the relationship between diabetic peripheral neuropathy (DPN) and vitamin D, nerve growth factor (NGF) and oxidative stress markers in patients with type 1 diabetes. METHODS: Ninety-six patients with type 1 diabetes were included in the study. All patients were evaluated for DPN with Michigan Neuropathy Screening Instrument. Fasting blood glucose, HbA1c, lipid parameters, 25 (OH) D3, NGF, total oxidant status, total antioxidant status and oxidative stress index were measured. RESULTS: Twenty-six patients (27 %) had DPN (group 1) and 70 patients did not have neuropathy (group 2). When the groups were evaluated with respect to general demographic characteristics, no differences were detected. Mean age, duration of diabetes and retinopathy were found significantly higher in patients who had neuropathy. Glomerular filtration rate levels were significantly lower in the neuropathy group. Between the groups, 25 (OH) vitamin D levels were significantly lower in the neuropathy group, while there were no differences in NGF levels or in oxidative stress markers. Michigan neuropathy examination score was positively correlated with age, and diabetes duration was negatively correlated with 25 (OH) vitamin D levels. In addition, 25 (OH) vitamin D was positively correlated with NGF. In the logistic regression analysis to determine the independent variables that will affect the development of neuropathy, duration of diabetes was detected as the only factor (p = 0.039, OR = 1.071). CONCLUSION: It seems that the most important risk factor for the development of neuropathy in type 1 diabetic patients is disease duration.

Early and late aortic propagation velocity values in STEMI patients after successful primary PCI and their relationship with neutrophil to lymphocyte ratio.

OBJECTIVE: Atherosclerosis leads to increased arterial resistance through thickening and stiffening of the arterial wall, a phenomenon largely known as arterial stiffness. M-mode propagation velocity of the descending thoracic aorta, named aortic velocity propagation (AVP) is a novel method for the measurement of the aortic stiffness. We aimed to investigate the difference between early and late values of AVP after successful primary percutaneous coronary intervention (PCI) in ST-elevation myocardial infarction (STEMI) patients. PATIENTS AND METHODS: A total of 103 (70 male, 67.9%) consecutive patients without a previous history of coronary artery disease, who presented with STEMI without hemodynamic compromise and underwent successful primary PCI were enrolled. Transthoracic echocardiography was performed in all patients after primary PCI at 12-24 hour in Intensive Care Unit (early measurements) and three months after the discharge during follow-up (late measurements). Doppler echocardiography, 2D and aortic M-mode propagation velocity measurements were recorded. Haematological and serum biochemical parameters of the study group were recorded. RESULTS: There were no statistically significant differences in 2D echocardiography measurements between early and late evaluations. AVP values increased during 3 months follow-up in all patients. Mean AVP values were 33.7± 11.6 cm/sn and 44.4±10.5 cm/sn at early and late measurements, respectively (p<0.001). There were significant correlations between differences of AVP and neutrophil-lymphocyte ratio between early and late measurements. CONCLUSIONS: We demonstrated for the first time that AVP values could improve after successful treatment in STEMI patients. The increment in AVP values was closely correlated with a decrement in neutrophil lymphocyte ratio. It can be postulated that AVP has strong correlations with the inflammatory markers.

Histological and histochemical characterization of the digestive tract of European catfish (Silurus glanis Linnaeus, 1758).

In this study was to examined the morphology, histology and histochemically the digestive tract of European catfish, Silurus glanis. Two-four age S. glanis obtained from Çelik Lake (Gölbasi-Adiyaman, Turkey). Six S. glanis, 59-71 cm length, 1.5-3.2 kg weight used for in the investigation. The body cavity was opened and samples of digestive tract (esophagus, stomach and intestine) were fixed in neutral buffered 10% formalin and embedded in paraffin. Dewaxed section (5-6 µm) were deparaffinized and stained with haematoxylin and eosin (H&E), Crossman triple, periodic acid-shiff (PAS), alcian blue (AB, pH 1.0 and 2.5) and PAS+AB pH 2.5 tecnique for different structures. The histological and histochemical structures of all specimens were viewed under a light microscope and microphotograph. The histological structure consists of four layer: tunica mucosa, submucosa, tunica muscularis and tunica serosa. The short esophagus of S. glanis have numerous deep longitudinal folds, squamous epithelium with numerous mucous cells which react positively to PAS and AB stains. The muscularis mucosa was organized in longitudinal and circular layers of striated muscular fibers. The stomach is sac-like shaped and its mucosa was formed by simple columnar epithelium with folds. Histologically, the stomach shows three different region: cardia, fundus and pylorus region. The surface epithelium of stomach reacted positively to PAS and AB (pH 1.0 and 2.5). The mucosal surface of intestine of S. glanis has numerous folds lined by simple tall columnar cells. There were large number goblet cells in the intestine. The goblet cells reacted to PAS and AB (pH 1.0 and 2.5).

Immunohistochemical study on localization of serotonin immunoreactive cells in the gastrointestinal tract of the European catfish (Silurus glanis, L.).

In this study, it was aimed to identify the distribution of serotonin immunoreactive cells within the gastrointestinal tract (GIT) of European catfish (Silurus glanis). For this purpose, the tissue samples were taken from the stomach (cardia, fundus and pylorus region) and intestine (anterior, middle and posterior region). They were examined by applying the avidin-biotin-immunoperoxidase method. The serotonin containing immunoreactive cells are presented in all regions of the GIT. It was determined to be localized generally in different distribution within the stomachs and intestines of S. glanis. It was found that the most intensive regions of immunoreactive cells were the cardia stomach and posterior of intestine.

A new echocardiographic parameter of arterial stiffness in end-stage renal disease.

BACKGROUND: Cardiovascular disease is the leading cause of death among patients with end-stage renal disease (ESRD). Arterial stiffness is an independent predictive parameter of overall and cardiovascular mortality in these patients. However, the defined procedures for the measurement of arterial stiffness are time consuming and not practical in daily practice. METHODS: The study population included 50 patients with ESRD who were treated with hemodialysis (HD; n=23) or peritoneal dialysis (PD; n=27) and 70 age- and sex-matched control subjects. Aortofemoral pulse wave velocity (PWV), carotid intima-media thickness (CIMT), and color M-mode propagation velocity of the descending aorta (aortic propagation velocity, APV) were measured. RESULTS: Compared to the control group, the patients with ESRD had significantly lower APV (46.4 ± 12.4 vs. 58.5 ± 8.5, p < 0.01) and higher PWV (10.5 ± 2.5 vs. 9.2 ± 1.2, p < 0.01) and CIMT (0.66 ± 0.15 vs. 0.43 ± 0.06, p < 0.01) measurements. There were significant correlations between APV and CIMT (r = - 0.769, p < 0.001), APV and PWV (r = - 0.682, p < 0.001), and PWV and CIMT (r = 0.564, p < 0.001). There were no significant differences in APV and PWV between the PD and HD patients. CONCLUSION: Arterial stiffness is an important indicator of atherosclerosis and arterial aging in patients with ESRD. The measurement of APV is an easy and practical new echocardiographic method and may be used to identify arterial stiffness in these patients.