Protective effect of magnesium preloading on cisplatin-induced nephrotoxicity: which dose is more suitable?

OBJECTIVE

Cisplatin is a widely used and potent cytotoxic chemotherapy agent, but its nephrotoxicity is a significant limiting side effect. Various premedication approaches have been implemented to preserve renal function, including magnesium (Mg) preloading. However, the optimal Mg dosage is still unknown. Our study aimed to assess the protective effects of different Mg doses as premedication in cisplatin-based chemoradiotherapy for patients with local/locally advanced cervical and head-neck cancers.

PATIENTS AND METHODS

This retrospective, multicenter study involved premedication with saline infusion containing potassium chloride and magnesium sulfate (MgSO4) for all patients before cisplatin treatment. Patients were divided into two groups: 12 mEq MgSO4 (low-dose Mg preload group, low-Mg) and 24 mEq MgSO4 (high-dose Mg preload group, high-Mg). Renal function was evaluated using serum creatinine (sCr, mg/dl) and estimated glomerular filtration rate (eGFR, ml/min). Acute kidney injury (AKI) was defined per the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. Renal outcomes and efficacy were compared between the groups.

RESULTS

In the low-Mg group (n = 159), sCr levels were significantly higher compared to baseline, various weeks during treatment, and at the 1st, 3rd, 6th, and 12th months post-treatment (p < 0.001). In the high-Mg group (n = 128), no significant changes were observed during treatment and at 1st, 3rd, and 12th months post-treatment (p > 0.05). A significant reduction in mean sCr level from baseline to 6 months was noted in the high-Mg group (p < 0.001). eGFR values are generally correlated with sCr levels. AKI occurred in 21 (13.2%) and 22 (17.7%) patients in the low-Mg and high-Mg groups, respectively (p = 0.292). There was no difference in progression-free or overall survival between the groups.

CONCLUSIONS

We clearly demonstrated that saline hydration with 24 mEql MgSO4 supplementation before cisplatin treatment has a better renal protective effect than 12 mEql MgSO4 without reducing efficacy, especially in patients with local/local advanced cervical and head-neck cancer receiving cisplatin with concurrent radiotherapy.

Pre-dilatation prior to carotid artery stenting in very severe carotid artery stenosis: beneficial or detrimental?

Background

There are many technical variations in carotid artery stenting and there is not a clear recommendation in pre-dilatation (Pre-D) prior to stenting. In this study we investigated the role of Pre-D before carotid artery stenting in patients with very severe carotid artery stenosis (≥90%).

Methods

A total of 298 patients with a carotid stenosis equal to or more than 90% were included to our study. Patients were divided into two groups as Pre-D and No-Pre-D. In-hospital and 3-year long-term clinical outcomes were compared between the groups.

Results

During the hospitalization, major stroke was more common in Pre-D group [n=6 (5.5%) vs. n=3 (1.5%), respectively], whereas overall ipsilateral stroke rates were similar between the groups. The rates of myocardial infarction were similar between the groups. In- hospital mortality was significantly higher in the Pre-D group than non-pre-D group [n=4 (3.6%) vs. n=0 (0%), respectively]. During the 3-year follow up period, the rates of ipsilateral stroke, major stroke, transient ischemic attack, myocardial infarction, and mortality were similar between the groups.

Conclusion

According to the literature, this is the first study evaluates the role of Pre-D in very severe (&gt;90%) carotid artery stenosis. The current study demonstrated that Pre-D might have a detrimental effect on in-hospital outcomes.

Funding Acknowledgement

Type of funding sources: None.

Effect of the number of parity on right heart chamber quantification

Introduction

Pregnancy is a process that causes several physiological changes including all systems as well as cardiovascular system. Ventricular hypertrophy and dilation of cardiac chambers are seen as a result of these changes. Although there are studies about pregnancy-related changes in echocardiographic examination; there is no data about the long-term effects of parity on these alterations. Therefore, we have evaluated the long-term effect of pregnancy on right ventricular (RV) dilation and RV hypertrophy and their relation to the parity number.

Methods

This prospective study included a total of 600 women (200 consecutive women who had no parity, 200 women who had a parity number of 1 to 4 and 200 women who had a parity number of more than 4). Right chambers' measurements were compared between the groups.

Results

In echocardiographic analysis, RV and right atrial dimensions and areas and RV wall thickness were higher in parous women. On the other hand, RV systolic function parameters were significantly lower in parous women. These significant changes showed a gradual increase or decrease by increasing parity number. By multivariate hierarchical logistic regression analysis, the 4 independent factors that increased the risk of RV dilation were age (OR: 1.16 CI: 1.10 – 1.20), body mass index (OR: 1.05, CI: 1.02 to 1.08), smoking (OR: 1.87, CI: 1.28 to 4.02), and giving a birth (OR: 3.94 CI: 1.82 – 8.81). There were also independent relationship between the number of parity and RV hypertrophy even after adjustment for several confounders.

Conclusion

Pregnancy-related physiological changes mostly resolve after delivery. This study about long-term effects of pregnancy on RV has demonstrated that there is a significant relation between the number of parity and either RV dilation or RV hypertrophy. Each parity had also additive effect on these changes.

Funding Acknowledgement

Type of funding sources: None.

Systemic immune-inflammation index predicts in-hospital and long-term outcomes in patients with ST-segment elevation myocardial infarction

Background

Inflammatory markers are significantly associated with cardiovascular disease and many markers have been used as predictor in patients with STEMI. This study examines the predictive value of the novel systemic immune-inflammation index (SII) in patients with ST-segment elevation myocardial infarction (STEMI).

Method

A total of 1660 patients with STEMI who underwent primary percutaneous coronary intervention in a tertiary heart center were enrolled in the study. SII was calculated using the following formula: Platelet × Neutrophil/Lymphocyte ratio. The patients were stratified into four quartiles (Q) according to admission SII level. In-hospital and 3-year outcomes were compared between the four groups (Q1–4)

Results

In-hospital cardiogenic shock, acute respiratory failure, acute kidney injury, ventricular arrhythmia, stent thrombosis, recurrent myocardial infarction, major adverse cardiac events, and mortality were significantly higher in the high SII groups (Q3 and Q4). Logistic regression models demonstrated that Q3 and Q4 had independent risk of mortality and Q4 had an independent risk of cardiogenic shock compared to Q1. ROC analysis showed that the best cut-off value of the Systemic Immune-Inflammatory Index to predict the in-hospital mortality was 1781 with 66% sensitivity and 74% specificity (AUC: 0.75; 95% CI: 0.69–0.81; p&lt;0.001). Kaplan Meier overall survivals for Q1, Q2, Q3 and Q4 were 97.6%, 96.9%, 91.6% and 81.0% respectively. Cox proportional analysis for 3-year mortality demonstrated that Q3 and Q4 had independent risk of death compared to Q1.

Conclusion

SII, a novel inflammatory index, had a better prediction of in-hospital and long-term outcomes than traditional risk factors in patients with STEMI.

Funding Acknowledgement

Type of funding sources: None.

Adrenomedullin and non-dipping circadian pattern in newly diagnosed essential hypertension

OBJECTIVE

There is frequently a relationship between nocturnal hypertension and non-dipping pattern and endothelial dysfunction. Studies conducted previously have indicated that adrenomedullin (AM) (a potent, long-lasting, vasodilatory peptide) is capable of regulating endothelial cell function. The aim of the current research is to investigate the association between absolute night-time blood pressure (BP) and circadian BP pat-tern with serum AM and high-sensitivity C-reactive protein (hsCRP) levels in cases in whom untreated arterial hypertension has been newly diagnosed.

METHODS

Ambulatory BP monitoring was performed in 100 individuals with hypertension (50 dippers,50 non-dippers) and 50 healthy controls for 24 hours. Measurement and recording of AM and hsCRP serum levels were performed.

RESULTS

A strong correlation between night-time BP levels and AM and hsCRP levels was determined(p<0.001). On the contrary, higher AM levels were determined in the non-dipper group compared to the dipper and normotensive groups (non-dipper group, 258±27 pg/mL; dipper group, 199±30 pg/mL; normotensive group, 150±11 pg/mL; p<0.001). The non-dipper group exhibited significantly higher hsCRP levels in comparison with the remaining two groups (p=0.017). An independent association was determined between AM (p=0.014) and hsCRP (p=0.032) and a non-dipping pattern in a multivariate logistic regression analysis.

CONCLUSIONS

The nocturnal hypertensive and non-dipper groups exhibited increased AM levels. An independent association was identified between AM and hsCRP and a non-dipping pattern. It is implied that increased AM levels in individuals with non-dipper hypertension may be related to a longer exposure time to high BP. The mentioned findings indicate a potential future part of AM in identifying patients with hypertension that are at higher risk of target organ damage (Tab. 3, Fig. 4, Ref. 41).

Cytotoxic, anti-proliferative and apoptotic effects of noscapine on human estrogen receptor positive (MCF-7) and negative (MDA-MB-231) breast cancer cell lines

AIM

Noscapine, a naturally occurring alkaloid obtained from opium poppy, is a microtubule-targeting agent. This study is aimed to investigate the effects of noscapine on human breast cancer cell lines by comparing them with those of tamoxifen and docetaxel.

METHODS

MCF-7 and MDA MB-23 cell lines were used to observe the effects of docetaxel, tamoxifen, and noscapine on cell proliferation. For each drug, cell blocks were prepared from cultured cells treated with IC50 dose of each drug and these were examined histologically. The expressions of Ki-67, Bcl-2, BAX, and cyclin-D1 were assessed immunohistochemically.

RESULTS

Although noscapine showed cytotoxic effects on both cell lines in a time and dose dependent manner, MDA-MB-231 cells were more susceptible to its effects. Noscapine inhibited MCF-7 and MDA-MB-231 cells proliferation in vitro with IC50 value of 29 µM and 69 µM, respectively, which was comparable with IC50 of tamoxifen (40 µM and 50 µM) and docetaxel (43 nM and 32 nM). Noscapine showed anti-proliferative effects by decreasing Ki-67, cyclin-D1 and apoptotic effects by increasing BAX/Bcl-2 ratio in both breast cancer cells. Its effect was comparable with tamoxifen and docetaxel.

CONCLUSION

Noscapine may be a good chemotherapeutic agent for the treatment of breast cancer, especially in estrogen receptor‑negative breast cancer (Tab. 2, Fig. 7, Ref. 40).

Effect of Erbium:yttrium aluminum garnet laser on bond strength of a total-etch adhesive system to caries-affected dentin on gingival wall

PURPOSE

To assess the effect of the erbium:yttrium aluminum garnet (Er:YAG) laser on bond strength of a total-etch adhesive system to the caries-affected dentin on the gingival wall.

MATERIALS AND METHODS

Ten human molars with proximal carious lesions were randomly divided into two groups. In the first group, the carious dentin was removed with a bur, whereas in the second group it was removed with the Er:YAG laser. Carious lesions were excavated with one of these two techniques until laser fluorescence values decreased to 15 in the center of the lesions. The teeth were then restored with a total-etch adhesive system (Adper Single Bond 2) and composite resin (Filtek Z250). Five teeth from each group were sectioned to obtain 1 mm2 stick-shaped microtensile specimens from each tooth. Twenty-five specimens were obtained for each group with using this technique. The data were analyzed in independent-samples t-test (α = 0.05). For each removal technique, one sample was analyzed using scanning electron microscopy.

RESULTS

No statistically significant differences were found between the bond strength of the Er:YAG laser and the bur-treated groups (P > 0.05).

CONCLUSION

The Er:YAG laser treatment did not negatively affect the bonding performance of the total-etch adhesive system to caries-affected dentin on the gingival wall.

The effect of vitamin D on MCF-7 breast cancer cell metabolism

The role of vitamin D in calcium absorption and bone health is known. The studies revealed that vitamin D modulates breast cancer cell growth and it is also associated with a reduced breast cancer risk. The primary objective of this study was to highlight the metabolic effect of Vitamin D on MCF-7 breast cancer cell line. For that purpose, we checked the apoptosis, energy, amino-acid and acylcarnitine levels in cancer cells, that the study propose, that 1α, 25(OH)2D3 could inhibit cell growth in a dose and time dependent manner. IC50 dose was calculated as 145 nM for vitamin D. We observed the apoptosis level in vitamin D groups, which were 18, 28 and 38.5 % at 24, 48 and 72 hours, respectively. During metabolic screening analysis, it was observed that glutamine, methionine and glutamic acid levels were treated more by Vitamin D groups in cell line and also, that acylcarnitine level was increased in 24 and 48 hour groups when compared to the control, but decreased in 72 hours. Further studies are needed to analyze the role of amino acids and acylcarnitines for early apoptosis and cancer metabolism (Tab. 2, Fig. 4, Ref. 24).

High cholesterol diet leads to oxidant load and peroxidation in the rabbit kidney tissue

OBJECTIVES

The aim of this study was to investigate possible effects of high cholesterol diet on oxidant/antioxidant status in rabbit kidney tissues.

BACKGROUND

Although a number of experimental animal models have suggested that hyperlipidemia is associated with progressive kidney failure data remain sparse on the role of dietary cholesterol intake on kidney disease.

METHODS

Twelve male New Zealand albino rabbits were randomly divided into two groups (control and cholesterol). Both groups were fed on a standard laboratory diet. Animals in the cholesterol group additionally received cholesterol (1 g/kg/day), orally. The study period was 12 weeks. Activities of catalase (CAT), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), nitric oxide synthase (NOS), xanthine oxidase (XO), paraoxonase (PON), adenosine deaminase (ADA) enzymes and levels of malondialdehyde (MDA) and nitric oxide (NO) were measured in kidney tissue samples. Histological examination of the kidney tissue samples was also done.

RESULTS

SOD, GSH-Px and XO enzyme activities were found to be decreased and NOS and PON activities increased significantly in cholesterol group compared to controls. As an indication of oxidation, MDA levels were found to be increased in cholesterol group. Histological examination revealed some derangements in the kidney tissue.

CONCLUSION

High cholesterol diet creates oxidant load and causes peroxidation, which in turn, leads derangements in the rabbit kidney tissue (Tab. 2, Fig. 2, Ref. 69).

Predicting Chronic Leukaemias from Assessment of Complete Peripheral Blood Counts

The chronic leukaemias include two distinct chronic neoplastic disease states, namely chronic myelogenous leukaemia (CML) and chronic lymphocytic leukaemia (CLL). The aim of this study was to assess the utility of leucocyte count, neutrophil percentage and absolute lymphocyte count from differential complete blood count analyses as indicators of the possible presence of CML and CLL. Blood counts from 102 patients with histopathologically confirmed CML and CLL were compared with counts for 858 cancer-free control subjects. Optimal cut-off values were identified by selecting values with the highest sensitivity–specificity combination for each blood count parameter for the two diseases. The results indicated that any individual with mature-appearing lymphocytes at a level > 6.65 × 109/l in the peripheral blood should be examined further for CLL, and that any individual with a leucocyte count > 18.0 × 109/l or a neutrophil proportion > 72.6% should be investigated for CML.

Effect of a re-wetting agent on bond strength of an adhesive to primary and permanent teeth dentin after different etching techniques

OBJECTIVE

This study investigated the effect of a re-wetting agent on the microtensile bond strengths (mTBS) of primary and permanent dentin after acid or laser etching.

MATERIALS AND METHODS

Twelve permanent and 12 primary molar teeth were ground to expose an occlusal dentin surface. Each group teeth were randomly divided into groups; I-II: 37% phosphoric acid etching with/without re-wetting agent, III-IV: Erbium: Yttrium aluminium garnet laser etching with/without re-wetting agent. An etch-and-rinse adhesive was used, and vertical sticks were obtained for the microtensile test.

RESULTS

mTBS of permanent teeth was higher than that of primary teeth (P < 0.05). Re-wetting agent groups were similar with control groups in both etching groups in the permanent teeth (P > 0.05). Re-wetting agent group was similar with the control group in acid etch group (P > 0.05) and lower than the control group in laser etch group in primary teeth (P < 0.05).

CONCLUSION

Acid etching in permanent teeth; laser etching in primary teeth was found more successful. The use of re-wetting agent did not provide an advance on bond strength of the adhesive in both primary and permanent teeth after acid-etch or laser-etch.

Characteristic imaging findings of duodenal perforation

Two patients were admitted to emergency room with complaint of abdominal pain with abrupt onset and retroperitoneal free air was detected in pararenal area on CT. In this paper, characteristic CT findings of patients diagnosed with duodenal perforation are presented under the light of literature data.

Levels of arginine and its products in dialysis patients

OBJECTIVES

Chronic renal failure is among significant public health problems all over the world. Despite advances in diagnosis and treatment approaches, cardiovascular morbidity and mortality is still high in chronic renal failure patients on dialysis. The aim this study is to investigate the importance of arginine, asymmetric dimethylarginine (ADMA) and nitric oxide (NO) levels in the pathophysiology of cardiovascular morbidity and mortality in patients with dialysis treatment program.

PATIENTS AND METHODS

53 patients with chronic renal failure receiving hemodialysis treatment and 34 healthy persons were participated to the study. Arginine and ADMA levels were measured by high-performance liquid chromatography (HPLC) fluorescence detector. NO levels were assessed by a colorimetric method. Albumin, urea, creatinine levels was performed using the spectrophotometric method.

RESULTS

Arginine levels were similar in dialysis patients when compared to the control group. Similarly NO levels did not show any difference between patient group and the control group. ADMA levels were found to be significantly high in dialysis patients compared to the control group (p < 0.005). Arginine/ADMA ratio was lower in the patient group compared to the control group (p < 0.001). Dialysis patients who have diagnosed coronary artery disease had low levels of albumin and creatinine. Arginine levels, ADMA levels and NO levels did not show any difference in the patients with coronary artery disease or not (p > 0.05). Arginine levels were significantly higher in men compared to women. Pearson correlation analysis showed that there was a correlation between NO and arginine levels. Arginine and Arginine/ADMA showed a positive correlation while ADMA and arginine/ADMA levels showed a negative correlation.

CONCLUSIONS

As a result, our data showed that ADMA clearance was impaired in hemodialysis patients. Increase in ADMA levels may play a role in atherosclerosis dependent morbidity and mortality.

D-dimer and D-dimer/fibrinogen ratio in predicting pulmonary embolism in patients evaluated in a hospital emergency department

OBJECTIVES

The D-dimer level, fibrinogen level, and D-dimer/fibrinogen ratio are used in the diagnosis of pulmonary embolism, but results vary. We evaluated these parameters in the diagnosis of pulmonary embolism in emergency clinic patients.

METHODS

In this prospective study, 200 patients (pulmonary embolism, 100 patients; no pulmonary embolism, 100 patients) had D-dimer and fibrinogen levels measured before intervention. Pulmonary embolism was diagnosed with computed tomography angiography or ventilation-perfusion scintigraphy.

RESULTS

Compared with patients who did not have pulmonary embolism, patients who had pulmonary embolism had significantly greater mean D-dimer level (pulmonary embolism, 6±7 μg/ml; no pulmonary embolism, 1±1 μg/ml; P⩽0·001) and D-dimer/fibrinogen ratio (pulmonary embolism, 3±3; no pulmonary embolism, 0·4±0·4; P⩽0·001), but similar mean fibrinogen levels (pulmonary embolism, 337±184 mg/dl; no pulmonary embolism, 384±200 mg/dl; not significant). In patients who had pulmonary embolism, mean D-dimer level and D-dimer/fibrinogen ratio were greater in high-risk than non-high-risk patients. With D-dimer cutoff 0·35 μg/ml, sensitivity was high (100%) and specificity was low (27%) for pulmonary embolism. With D-dimer/fibrinogen ratio cutoff 0·13, sensitivity was high (100%) and specificity was low (37%) for pulmonary embolism.

CONCLUSION

A D-dimer level <0·35 μg/ml may exclude the diagnosis of pulmonary embolism. At a D-dimer cutoff 0·5 μg/ml and D-dimer/fibrinogen ratio cutoff 1·0, the D-dimer/fibrinogen ratio may have better specificity than D-dimer level in the diagnosis of pulmonary embolism, but the D-dimer/fibrinogen ratio may lack sufficient specificity in screening.

Evaluation of oxidative stress using exhaled breath 8-isoprostane levels on chronic kidney disease

BACKGROUND

There have been limited numbers of studies on patients with chronic kidney disease (CKD) to determine oxidative stress in exhaled breath condensate (EBC). Those two studies have been carried out on hemodialysis patients, and hydrogen peroxide and nitric oxide have been studied in order to show oxidative stress on EBC.

AIMS

We investigated oxidative stress in EBC evaluating 8-isoprostane levels on different stages of CKD.

MATERIALS AND METHODS

A total of 81 patients with 2-4 CKD stages have been evaluated prospectively. The patients have been categorized into three groups according to their CKD stages. For biochemical analysis, blood and breathing air samples were taken. 8-isoprostane has been measured using immunoassay method as the indicator of oxidative stress in EBC.

RESULTS

8-isoprostane values were 8.19 ± 4.56, 13.89 ± 8.70, and 14.20 ± 10.68 pg/min group 1, 2, and 3, respectively; and the EBC 8-isoprostane levels increased significantly as CKD stages advanced (P0 = 0.018). There was a statistically significant reverse correlation between 8-isoprostane and glomerular filtration rate (GFR; r = -0.275; P = 0.014), but not between 8-isoprostane and C-reactive protein (r = -0.183; P = 0.177).

CONCLUSIONS

We determined the level of 8-isoprostane in EBC of patients with different stages of CKD and showed that the level of 8-isoprostane significantly increased through the progress of CKD. We consider that our study is important because there have been limited number of studies that evaluate oxidative stress in CKD using EBC which is a noninvasive method.

The effect of feto-maternal blood type incompatibility on development of gestational diabetes mellitus

OBJECTIVE

To assess the relation between fetal and maternal blood type (ABO, Rh) incompatibility and development of gestational diabetes mellitus (GDM).

MATERIALS AND METHODS

A total of 500 pregnant women underwent diagnostic test for GDM by a 100-g oral glucose tolerance test (OGTT) after an 8 to 12-h overnight fast participated in this study. OGTT was performed between the 24-28 weeks of gestation, but participants who were at high risk for GDM were tested after the first prenatal visit. In the postpartum period, maternal and infant blood types were determined. Presence of GDM was evaluated in terms of matched and unmatched fetal and maternal ABO and Rh blood types separately.

RESULTS

GDM was detected in 235 participants. Unmatched ABO blood types between the mother-infant pairs were present in 44.7% (n=105) of GDM (+) and 35.8 % (n=95) of GDM (-) patients. Incompatible feto-maternal ABO blood type was positively correlated with development of GDM which was marginally significant. (p=0.045; R=1.2;95% CL; 1.004-1.48). However, Rh feto-maternal blood type incompatibility was not related with development of GDM.

CONCLUSIONS

Feto-maternal ABO blood type incompatibility may be a weak risk factor for the development of GDM.

Acetylsalicylic acid protects erectile function in diabetic rats

We aimed to evaluate the effect of acetylsalicylic acid (ASA) treatment on diabetes-induced erectile dysfunction. Adult male Sprague-Dawley rats were divided into four groups as follows: (i) control (C), (ii) diabetic (D), (iii) ASA-treated control (C+ASA) and (iv) ASA-treated diabetic (D+ASA) groups. In groups 2 and 4, diabetes was induced by injection of 35 mg kg(-1) streptozotocin. ASA (100 mg kg(-1) day(-1) , orally) was administrated to rats in groups 3 and 4 for 8 weeks. Both intracavernosal pressure (ICP) and mean arterial blood pressure (MAP) were measured in in vivo studies. In organ bath, the relaxation responses to acetylcholine (ACh), electrical field stimulation (EFS) and sodium nitroprusside were tested in corpus cavernosum (CC) strips. The mRNA expression for neuronal nitric oxide synthase (nNOS) was calculated using reverse transcription polymerase chain reaction technique. In in vivo experiments, diabetic rats displayed reduced ICP/MAP values, which were normalised with ASA treatment. The relaxant response to high-dose ACh and EFS at low frequencies (1-8 Hz) in CC strips from the D+ASA group were significantly higher when compared to the D group. Treatment with ASA normalised the raised mRNA expressions of nNOS in diabetic penile tissues. ASA may be involved in mRNA of protein synthesis of NO released from nonadrenergic and noncholinergic cavernosal nerve in diabetes.

Experimental and theoretical approaches for identification of p-benzophenoneoxycarbonylphenyl acrylate

The aim of this multidisciplinary study is to characterize a title compound, p-benzophenoneoxycarbonylphenyl acrylate (BPOCPA) synthesized by condensation reaction of p-acryloyloxybenzoyl chloride (ABC) with 4-hydroxybenzophenone (HBP) by means of experimental and theoretical evidences. The spectroscopic properties of the compound are experimentally examined by Fourier transformation-infrared (FTIR) spectra (in the region 400-4000 cm(-1)) and nuclear magnetic resonance (NMR) chemical shifts (with a frequency of 400 MHz). For the theoretical studies, the optimized molecular structures, vibrational frequencies including infrared intensities and Raman activities, corresponding vibrational spectra interpreted with the aid of normal coordinate analysis based on scaled density functional force field, atomic charges, thermodynamic properties, (1)H and (13)C NMR chemical shifts, JCH and JCC coupling constants belonging to the BPOCPA compound are analyzed in the ground state by the way of the density functional theory (B3LYP) with the standard 6-311++G(d,p) level of theory for the first time. All the results obtained show that the calculated vibrational frequencies and chemical shifts are observed to be in good agreement with the available experimental findings. According to the comparison between experimental results and theoretical data, the calculation level chosen plays an important role in understanding of dynamics of the title compound studied in this work. The self-consistent field (SCF) energy of the molecule in six different solvent media is also analyzed at the same basis set by applying both the Onsager and Polarizable Continuum Model (PCM). It is found that the SCF energies deduced from the methods reduce with the enhancement of the solvent polarity as a consequence of the increment in the stability of the compound studied. Besides, the changes of the PCM calculations are found to be higher than those of the Onsager ones, confirming that the former method displays a more stable structure than latter model.

Shaking the family tree: identification of novel and biologically active alternatively spliced isoforms across the KLF family of transcription factors

Alternative splicing represents a unique post-transcriptional mechanism that increases the complexity of the eukaryotic proteome-generating protein isoforms whose functions can be novel, diverse, and/or even antagonistic when compared to its full-length transcript. The KLF family of genes consists of ≥17 members, which are involved in the regulation of numerous critical cellular processes, including differentiation, cell proliferation, growth-related signal transduction, angiogenesis, and apoptosis. Using a strategy based on RT-PCR, selective cloning, and promoter-based assays of cancer-relevant genes, we identify and characterize the existence of multiple biologically active KLF splice forms across the entire family of proteins. We demonstrate biological function for a number of these isoforms. Furthermore, we highlight a possible functional interaction between full-length KLF4 and one of its splice variants in up-regulating cellular proliferation. Taken together, this report identifies for the first time a more complete view of the genomic and proteomic breadth and complexity of the KLF transcription factor family, revealing the existence of highly expressed and biologically active isoforms previously uncharacterized. In essence, knowing that these KLF isoforms exist provides the first step toward understanding the roles of these genes in human health and disease.

Hypoxia inducible factor-1 alpha and carbonic anhydrase IX overexpression are associated with poor survival in breast cancer patients

PURPOSE

Hypoxia is common in many solid tumors such as breast, head-neck, and soft tissue malignancies. Hypoxia causes overexpression of hypoxia inducible factor-1 alpha (HIF-1α) and carbonic anhydrase IX (CA IX) which are associated with unfavorable prognosis in breast cancer. In our study, we evaluated HIF-1α and CA IX expression in patients with breast cancer.

METHODS

Between June 1996 and June 2008, 111 women with breast cancer were evaluated. Estrogen receptor (ER) and progesterone receptor (PR) status and Her2/ neu expression were evaluated by immunohistochemical methods. Her-2/neu expression was also assessed by FISH method when needed. Two groups were created: ER and PR positive, Her-2/neu negative (group 1, n=56); and ER and PR negative, Her-2/neu positive (group 2, n=55). HIF-1α and CA IX expressions were investigated in both groups and results were compared. In addition, we investigated the association between HIF-1α and CA IX expressions with stage, grade, lymph node metastasis, tumor size, menopause status and survival.

RESULTS

Median patient age in group 1 was 52 years (range 34-77), and in group 2 47 years (range 27-83). HIF-1α expression was detected in 26 (46.4%) of group 1 and in 46 (83.6%) of group 2 patients (p=0.0001). CA IX expression was detected in 25 (46.4%) of group 1 and in 37 (67.3%) of group 2 patients (p7equals;0.0137rpar;. In group 1, median disease free survival (DFS) was 97 months and in group 2 46 months (p=0.0308). In group 1, median overall survival (OS) was 108 months and in group 2 75 months (p=0.0339).

CONCLUSION

HIF-1α and CA IX overexpressions are observed more often in ER and PR negative, Her-2/neu positive breast cancer and are associated with poor survival.

Micro-Raman, FTIR, SEM-EDX and structural analysis of the Çanakkale meteorite

This study demonstrates for the first time, the spectroscopic characterization of Çanakkale Meteorite that fell at Çanakkale, Republic of Turkey (40°8'44″N; 26°24'23″E). The olivine group [(Mg, Fe)(2)SiO(4)], enstatite [Mg(2)Si(2)O(6)] (one of the orthopyroxene minerals) and plagioclase were identified by the micro-Raman and FTIR spectroscopies and EDX-SEM analyses. This meteorite has not yet been classified in the World's Database of Meteorites. The aim of this study is to investigate this meteorite by vibrational spectroscopic techniques and open the possibility to classify it and list in the World's Database of Meteorites.

The Effect of Bleaching Agents on the Color Stability of Ceromer and Porcelain Restorative Materials In Vitro

Purpose

The aim of this in vitro study was to determine the color changes of five different restorative materials after exposing these materials to two different home bleaching agents.

Methods

This study applied bleaching agents to an ultralow-fusing porcelain, a low-fusing porcelain, two types of heat-pressed glass ceramics, and a ceromer. A total of 24 disc-shaped specimens were fabricated (with a diameter of 10 mm and a thickness of 2 mm) from each material (n=12). The initial color measurements were taken with a spectrophotometer. The first set of specimens were bleached with 10% hydrogen peroxide (HP) for one hour daily for 10 days. The other set of specimens were bleached with 10% carbamide peroxide (CP) bleaching gel for eight hours daily for 14 days. Data were analyzed with the one-way analysis of variance and Kruskal-Wallis statistical test. The difference in the prebleaching and postbleaching color of each material was considered to be statistically significant at p &lt; 0.05.

Results

The study found a statistically significant difference among the color changes of the test groups after exposing them to both bleaching agents (p&lt;0.05). Appreciable color change was observed in the Estenia (ΔE=3.99) specimens that were bleached with the HP, and noticeable color changes were observed in the Estenia (ΔE=1.89) and IPS Empress 2 (ΔE=1.66) groups when they were treated with the CP.

Conclusions

Restorations (especially polymer-containing restorative materials) should be protected before any bleaching procedure due to the high risk of color change.

A prospective, multi-center study: factors related to the management of diabetic foot infections

The Turkish Association of Clinical Microbiology and Infectious Diseases, Diabetic Foot Infections Working Group conducted a prospective study to determine the factors affecting the outcomes of diabetic foot infections. A total of 96 patients were enrolled in the study. Microbiological assessment was performed in 86 patients. A total of 115 causative bacteria were isolated from 71 patients. The most frequently isolated bacterial species was Pseudomonas aeruginosa (n = 21, 18.3%). Among cases with bacterial growth, 37 patients (43%) were infected with 38 (33%) antibiotic-resistant bacteria. The mean (±SD) antibiotics cost was 2,220.42 (±994.59) USD in cases infected with resistant bacteria, while it was 1,206.60 (±1,160.6) USD in patients infected with susceptible bacteria (p < 0.001). According to the logistic regression analysis, the risk factors related to the growth of resistant bacteria were previous amputation (p = 0.018, OR = 7.229) and antibiotics administration within the last 30 days (p = 0.032, OR = 3.796); that related to the development of osteomyelitis was wound size >4.5 cm(2) (p = 0.041, OR = 2.8); and that related to the failure of the treatment was the growth of resistant bacteria (p = 0.016, OR = 5.333). Diabetic foot osteomyelitis is usually a chronic infection and requires surgical therapy. Amputation is the accepted form of treatment for osteomyelitis. Limited limb-saving surgery and prolonged antibiotic therapy directed toward the definitive causative bacteria are most appropriate. This may decrease limb loss through amputations. As a result the infections caused by resistant bacteria may lead to a high cost of antibiotherapy, prolonged hospitalization duration, and failure of the treatment.

Efficacy and toxicity of preoperative chemotherapy with docetaxel and epirubicin in locally advanced invasive breast cancer

PURPOSE

To investigate the efficacy and safety of neoadjuvant chemotherapy with docetaxel plus epirubicin with granulocyte colony-stimulating factor (G-CSF) support in locally advanced breast cancer patients.

METHODS

We retrospectively evaluated the records of 39 patients with locally advanced breast cancer. All of them received neoadjuvant epirubicin 75 mg/m(2) plus docetaxel 75 mg/m(2) every 3 weeks with G-CSF support. Responding patients were subjected to breast-conserving or modified radical mastectomy.

RESULTS

Four (10.3%) patients achieved clinical complete response (cCR) and 25 (64.1%) clinical partial response (cPR). Pathologic complete response (pCR) was observed in 4 patients with cCR. Ten (25.6%) patients achieved stable disease (SD), while no patient had progressive disease (PD). Grade 3 and 4 neutropenia was observed in 6 (15.3%) and 4 cases (10.3%), respectively. Febrile neutropenia was observed in 2 (5.1%) cases and anemia in 7 (17.9%) cases. Grade 1/2 mucositis was observed in 12 (30.7%) patients and grade 1/2 peripheral neuropathy in 7 (17.9%) patients. Dose reduction was necessary in 4 patients with grade 4 neutropenia. The median disease-free survival was 60 months (95% CI: 41-79 months). Median overall survival was not reached. Five-year overall survival was 64.2%.

CONCLUSION

The combination of docetaxel plus epirubicin was active and tolerable in neoadjuvant treatment of locally advanced breast cancer.

Primary pure small cell carcinoma of the urinary bladder that responded to carboplatin plus etoposide: a case report and review of the literature

Primary pure small cell carcinoma of the urinary bladder (SCCB) is an extremely rare tumor and accounts for less than 1% of all malignant tumors of the urinary bladder. This tumor exhibits more aggressive behavior than bladder transitional cell carcinoma. Unfortunately, optimal treatment strategy for this malignancy is still unknown. We present a patient with metastatic primary pure SCCB (stage IV) who responded to carboplatin plus etoposide combination chemotherapy and discuss the relevant current literature.

Association of hypoxia inducible factor-1 alpha and carbonic anhydrase IX overexpression and survival in HER2/neu positive hormone-unresponsive breast cancer patients

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Background: Hypoxia is common in solid tumors with overexpression of hypoxia inducible factor-1 alpha (HIF-1 alpha) and carbonic anhydrase IX (CA IX). In our study, we evaluated HIF-1alpha and CA IX expression in Her-2/neu positive hormone- unresponsive breast cancer patients. Methods: One hundred and eleven patients with operable breast cancer were identified who had paraffin-embedded tissue blocks available. Estrogen and progesterone receptors and Her-2/neu expression were evaluated by immunohistochemistry (IHC). FISH was used for IHC 2+ cases. We assigned two groups with 56 patients who have ER and PR receptor positive, Her-2/neu negative (group 1) and with 55 patients who have ER and PR negative, Her-2/neu positive (group 2). HIF 1 alpha and CA IX expressions were investigated and results were compared for both groups. Additionally, we investigated the association between HIF 1 alpha and CA IX expressions with stage, grade, lymph node metastasis, tumor dimension and menopause status. Results: Median age of the patients was 52 years (range, 34–77) in group 1 and 47 years (range, 27–83) in group 2. Nuclear HIF-1alpha expression was detected in 26 (46.4%) and 46 patients (83.6%) in group 1 and 2, respectively (p<0.0001). Membranous CA IX expression was detected in 25 (46.4%) and 37 (67.3%) patients in group 1 and 2, respectively (p<0.013). In group 1, median disease free survival (DFS) has not been reached. In group 2, median DFS was 46 months (95%CI: 42.98–49.02) (p= 0.0308). In group 1, median overall survival (OS) was 108 months (95%CI: 90.65–125.35) whereas in group 2, median OS was 75 months (95 % CI: 64.94- 85.06) (p= 0.0339). Conclusions: HIF-1 alpha and CA IX overexpressions were more frequently observed in ER and PR negative, Her-2/neu positive breast cancer. This was associated with shorter disease-free and overall survival.

No significant financial relationships to disclose.

Comparative efficacy of reduced or standard doses of lenograstim for peripheral blood stem cell mobilization and transplantation: A randomized study in patients undergoing autologous peripheral stem cell transplantation

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Background: 10 microg/kg/day of filgrastim and lenograstim have been recommended for mobilization of CD34+ cells without associated chemotherapy. However,in our previous randomized study we demonstrated that a 7.5 microg/kg/day dose of lenograstim has been as efficacious as 10 microg/kg/day of filgrastim. In this study, we investigated whether a reduced dose of lenograstim is equavalent to standard dose for autologous peripheral blood stem cell (PBSC) mobilization and transplantation. Methods: A total of 49 consecutive patients were randomized to either low dose (7.5 microg/kg/day, n = 24) or standard dose (10 microg/kg/day, n = 25) of lenograstim. These two groups were similar in regard to disease, sex, body weight, body surface area, conditioning regimens, previous chemotherapy cycles and radiotherapy. Each dose of lenograstim was administered for 4 consecutive days. The first PBSC apheresis was done on the 5th day. In the posttransplant period, lenograstim was given at 5 microg/kg/day until leukocyte engraftment. Results: Successful mobilization with the first apheresis, was achieved in 10/24 (42%) patients in low dose group versus 14/25 (56%) patients in standard dose group. No significant difference was seen in the median number of CD34+cells mobilized, as well as the median number of apheresis, median volume of apheresis, percentage of CD34+ cells, and CD34+ cell number. Leukocyte and platelet engraftments, the number of days requiring G-CSF and parenteral antibiotics, the number of transfusions were similar in both groups in the posttransplant period. Conclusions: Lenograstim 7.5 microg/kg/day is as efficious as Lenograstim 10 microg/kg/day for autologous PBSC mobilization and transplantation.

No significant financial relationships to disclose.

Intrasellar plasmacytoma: an unusual presentation of multiple myeloma

INTRODUCTION

Plasmacytomas are unusual causes of a sellar mass. Occasionally, they can be misdiagnosed as a nonfunctioning adenoma because of radiological and clinical similarities.

LITERATURE REVIEW

We reviewed the pertinent literature and discuss here in the light of an illustrative case of our own.

DISCUSSION

A 70-year-old woman presented with a recurrent hypophysial mass. Initial diagnosis of a nonfunctioning pituitary adenoma was later overruled by a repeat biopsy, which showed a plasmacytoma. The tumor stained positively for CD138 and kappa light chain. Further studies confirmed the diagnosis of multiple myeloma. The patient was successfully treated with radiotherapy followed by systemic chemotherapy. Because they have different therapeutic implications, extramedullary plasmacytomas involving pituitary gland should be considered in the differential diagnosis of a nonfunctioning pituitary mass.