“
“KETEYIAN, S. J., D. KITZMAN, F. ZANNAD, J. LANDZBERG, J. M. ARNOLD, P. BRUBAKER, C. A. BRAWNER, D. BENSIMHON, A. S. HELLKAMP, and G. EWALD. Predicting Maximal HR in Heart Failure Patients on beta-Blockade Therapy. Med. Sci. Sports Exerc., Vol. 44, No. 3, pp. 371-376, 2012. Purpose: Standards for estimating maximal HR are important when interpreting the adequacy of physiologic stress during exercise testing, assessing chronotropic response, and prescribing an

exercise training regimen. The equation 220 – age is used to estimate maximum HR; however, it overestimates measured maximal HR in patients taking beta-adrenergic blockade (beta B) therapy. This study developed and validated a learn more practical equation to predict maximal HR in patients with heart AZD6244 molecular weight failure (HF) taking beta B therapy. Methods: Data from symptom-limited exercise tests completed on patients with systolic HF participating in the Heart Failure: A Controlled Trial Investigating Outcomes of Exercise Training trial and taking a beta B agent were used to develop a simplified equation, which was validated using bootstrapping. Results: The simplified

derived equation was 119 + 0.5 (resting HR) – 0.5 (age) – (0, if test was completed using a treadmill; 5, if using a stationary bike). The R-2 and SEE were 0.28 and 18 beats.min (1), respectively. Validation of this equation yielded a mean R-2 and SEE of 0.28 and 18 beats.min(-1), respectively. For the equation 220 – age, the R-2 was -2.93, and the SEE was 43 beats.min(-1). Conclusions: We report a valid and simple population-specific equation for estimating peak HR in patients with HF taking

beta B therapy. This equation should be helpful when evaluating chronotropic response or assessing if a maximum effort was provided during exercise testing. We caution, however, that the magnitude of the variation (SEE Sapanisertib in vitro = 18 beats.min(-1)) associated with this prediction equation may make it impractical when prescribing exercise intensity.”
“The rates of biodegradation of endosulfan by P. aeruginosa were determined with different initial endosulfan concentrations (10, 50, 100, 150, 200 and 250 mg l(-1)) and different growth linked kinetic models were fitted at these concentrations. At 10 mg endosulfan l(-1), Monod no growth model was well fitted. Monod with growth model described the biodegradation pattern at an initial concentration of 50, 100 and 150 mg endosulfan l(-1). Significant increases of P. aeruginosa MN2B14 density in broth culture during incubation further support this result. Conversely, zero order kinetic model was well fitted into the biodegradation data if initial endosulfan concentration was a parts per thousand yen200 mg endosulfan l(-1). The kinetics of endosulfan biodegradation by P. aeruginosa MN2B14 in liquid broth was highly dependent upon its initial concentration.

The time differences obtained from systolic strain curves obtained by 2D-STE were defined as TD-RS for radial strain, TD-CS for circumferential strain, and TD-LS for longitudinal strain.\n\nResults: The high septet pacing group had significantly shorter TD-TDI (20.0 +/- 24.3 ms vs. 59.7 +/- 43.0 ms, p < 0.0001), TD-RS (13.5 +/- 19.9 ms vs. 45.8 +/- 24.6 ms, p < 0.0001), and TD-LS (42.7 +/- 22.0 ms vs. 66.6 +/- 26.8 ms,

p = 0.001) values compared to the apical pacing group. There was no significant difference in TD-CS between the two groups.\n\nConclusion: Left ventricular dyssynchrony was smaller in patients with high septet pacing. The results show that 2D-STE is useful for detection of differences in left ventricular mechanical dyssynchrony in patients with permanent pacemaker implantation, in addition to TDI. (c) 2010 Japanese College of Cardiology. Published by Elsevier Ireland selleck kinase inhibitor Ltd. All Bcl-2 inhibitor rights reserved.”
“BACKGROUND & AIMS: Patients use the Internet as a resource for information about their diseases. A systematic review evaluating the quality of information available for inflammatory bowel disease

patients on the Internet regarding treatment options was performed. METHODS: Google was used to identify 50 websites on 3 occasions. A data quality score (DQS) (potential score, 0-76) was developed to evaluate the content of websites that scores patient information on indications, efficacy, and side effects of treatment. Other outcome measures were a 5-point global quality score, a drug category quality score, the DISCERN instrument, a reading grade level score, and information about integrity. RESULTS: The median DQS was 22, range 0-74, median global quality score was 2.0, and median Flesch-Kincaid reading grade level was 12.0, range 6.9-13.7. Eight websites achieved a global quality score of 4 or 5. The DQS was highly associated with the global quality score (r = 0.82) and the DISCERN instrument (r = 0.89). There was

poor association between the DQS and the rank order in all 3 Google searches. Information on funding source (59%) and date of last update (74%) were often lacking. CONCLUSIONS: Repotrectinib supplier There is marked variation in the quality of available patient information on websites about the treatment options for Crohn’s disease and ulcerative colitis. Few websites provided high quality information. There is a need for high quality accredited websites that provide patient-oriented information on treatment options, and these sites need to be updated regularly.”
“Background: Routine drain placement after breast cancer surgery is standard practice. Anchoring the axillary and mastectomy flaps to the underlying chest wall with sutures has been advocated as a means of avoiding drainage following breast surgery. This study compares outcomes following flap fixation or routine drain placement and uniquely considers the economic implications of each technique.

g. 1%. Thus, the ethanol titer of fermentation is controlled via transcriptional regulation and the properties of specific enzymes in Thermoanaerobacter. These results provide evidence for an ethanol balance model and offer the possibility to raise the ethanol titer by metabolic engineering. (C) 2010 Elsevier Inc. All rights reserved.”
“Thioacetamide (TAA) has been used to develop a rodent model for hepatocarcinogenesis. To determine the genes with epigenetic modifications in

early LY2835219 concentration hepatocarcinogenesis, we did a genome-wide scan for hypermethylated promoter regions using CpG island microarrays in TAA-promoted rat liver tissue. Eight genes were selected based on the microarray profile; of these, Yy1 and Wdr45b

were confirmed to be hypermethylated by methylation-specific polymerase chain reaction (PCR) and pyrosequencing and downregulated by real-time reverse transcription PCR. Non-neoplastic liver cells had nuclear Yy1 immunoreactivity, while preneoplastic selleck compound foci with glutathione S-transferase placental form (GST-P) immunoreactivity had decreased Yy1 immunoreactivity. The incidence of these foci was proportional to the dose of TAA administered. Co-expression analysis of gene products downstream of Yy1 revealed increased nuclear phospho-c-Myc(+) foci as well as nuclear and cytoplasmic p21(Cip1+) foci in Yy1(-) or GST-P+ foci in response to TAA-promotion dose. Although the absolute number of cells was low, the incidence of death receptor 5(-) foci was increased in Yy1(-) foci in proportion to the TAA dose. Yy1(-)/GST-P+ foci revealed a higher number of proliferating cell nuclear antigen (PCNA)-immunoreactive cells than Yy1(+)/GST-P+ foci, while cleaved caspase-3(+) cells were unchanged between Yy1(-)/GST-P+ and Yy1(+)/GST-P+ foci. In the case of Wdr45b, most GST-P+ foci were Wdr45b(-) and were not increased by TAA promotion. These results suggest involvement of Yy1 in the epigenetic gene regulation at the early stages of TAA promoted cell

proliferation and concomitant cell cycle arrest in preneoplastic lesions. (C) 2014 XMU-MP-1 chemical structure Elsevier Inc. All rights reserved.”
“Objective: To use a novel teaching exercise to encourage students to practice ophthalmoscopy and to measure the learning effect both subjectively and objectively.\n\nDesign: Comparative case series.\n\nParticipants: One hundred thirty-one fourth-year medical students on their 1-week ophthalmology rotations with 89 in the experimental group and 42 in the control group.\n\nMethods: Those in the experimental group had 1 eye dilated and their optic nerve photographed on the first day. The next day, these students received an unlabeled optic nerve photograph belonging to 1 of their peers (typically 8-10 per group) and were given 3 days to identify the student matching the photograph.

Dietary fat has been shown to increase postprandial endotoxemia. Therefore, the aim of this study was to assess the effects of different dietary oils on intestinal endotoxin transport and postprandial endotoxemia using swine as a model. We hypothesized that oils rich in saturated fatty acids (SFA) would augment, while oils rich in n-3 polyunsaturated

fatty acids (PUFA) would attenuate intestinal endotoxin transport and circulating concentrations.\n\nMethods: Postprandial endotoxemia was measured in check details twenty four pigs following a porridge meal made with either water (Control), fish oil (FO), vegetable oil (VO) or coconut oil (CO). Blood was collected at 0, 1, 2, 3 and 5 hours postprandial and measured for endotoxin. Furthermore, ex vivo ileum endotoxin transport was assessed

using modified Ussing chambers and intestines were treated with either no oil or 12.5% (v/v) VO, FO, cod liver oil (CLO), CO or olive oil (OO). Ex vivo mucosal to serosal endotoxin transport permeability (Papp) was then measured by the addition of fluorescent labeled-lipopolysaccharide.\n\nResults: Postprandial serum endotoxin concentrations were increased after a meal rich in saturated fatty acids and decreased with click here higher n-3 PUFA intake. Compared to the no oil control, fish oil and CLO which are rich in n-3 fatty acids reduced ex vivo endotoxin Papp by 50% (P < 0.05). Contrarily, saturated fatty acids increased the Papp by 60% (P = 0.008). Olive and vegetable oils did not alter intestinal endotoxin Papp.\n\nConclusion: Overall, these results indicate that saturated and n-3 PUFA differentially regulate intestinal epithelial endotoxin transport. This

may be associated with fatty LY2157299 acid regulation of intestinal membrane lipid raft mediated permeability.”
“BACKGROUND & AIMS: Hepatic elastography (HE) is a noninvasive technique that measures liver stiffness and is used to diagnose hepatic fibrosis. It can help patients who are thought to have early-stage disease avoid a staging liver biopsy, but only when confounding variables that increase liver stiffness are excluded. Chronic inflammation from hepatitis C virus (HCV) infection is not considered to be one of these variables. METHODS: We identified 684 patients with HCV and METAVIR fibrosis scores of 0-2 from a prospective, multi-institutional study of liver stiffness in 2880 patients with chronic liver disease. Patients were 49.6 +/- 9.0 years old, 64.3% were male, and they had an average body mass index of 26.7 +/- 4.1 kg/m(2). RESULTS: In a multivariate analysis, inflammation (based on histologic analysis) and level of alanine aminotransferase (ALT) were associated with liver stiffness. The chances of a patient having a level of stiffness that indicates cirrhosis increased with grade of inflammation and level of ALT. By using a conservative 14.

A clear and consistent change was found in the manner in which patients increased their ventilation during exercise after surgery. All patients showed an increase in tidal volume for a given ventilation rate, which was significant. The plication procedure reduced the respiratory rate for any exercise level in all patients, and this effect was more pronounced during exercise.\n\nCONCLUSIONS: In patients with hemidiaphragm paralysis who underwent a diaphragm plication exercise, tidal volumes increased and the ventilatory

frequency GSK2879552 manufacturer decreased. Despite this improvement, maximal exercise capacity remained unaltered.”
“This study aimed at investigating the efficacy of a PGPR strain, Bacillus subtilis 21-1 (BS21-1), under two different soil conditions for plant growth promotion and disease suppression. BS21-1 treatment significantly (P smaller than 0.05) promoted plant growth as measured by plant height and leaf width and increased the seed germination rate in organic soil (OS) compared with seed bed soil (SBS). In Chinese cabbage and lettuce, soft rot disease was reduced to 45 and 23.5 %, respectively, by BS21-1, and to 33 and 52.5 %, respectively, by benzo-(1,2,3)-thidiazole-7-carbothioic acid S-methyl ester (BTH) treatments in OS compared with SBS. These levels of

disease suppression were greater than those found in the water-treated control upon pathogen challenge. There was a greater reduction of anthracnose lesions on the leaves of selleck compound library cucumber plants treated with BS21-1 and BTH in OS when compared with SBS. Botrytis rot disease in tomato caused by Botrytis cinerea was drastically reduced to 2 % in OS and 4 % in SBS by BS21-1 treatment. In the four plants studied, there was increased disease suppression in OS compared with SBS. Upon treatment with BS21-1, there was an increased expression GKT137831 supplier of the PR-1a gene by beta-gulcuronidase (GUS) activity in tobacco (Nicotiana

tabacum L. cv. Xanthi-nc) plants in OS compared with SBS, which indicates a possible role of the SA pathway in BS21-1 mediated plant protection. Thus, the isolate BS21-1 could effectively be used as one of the biocontrol agents for disease suppression in four vegetable crops through systemic resistance and for plant growth promotion.”
“Nucleophilic addition of Grignard reagents and organolithium species to a 3-silyloxy-3,4,5,6-tetrahydropyridine N-oxide provides trans-2,3-disubstituted N-hydroxypiperidines exclusively. The application of this methodology to the preparation of a diversity of useful trans-2-substituted-3-hydroxypiperidines, a concise synthesis of (+)-swainsonine, and an enantiopure 1-substituted quinolizidine of utility in target-directed synthesis is reported.”
“Purpose of review\n\nThis review summarizes recent findings on how HIV-1 infection affects dendritic cells in their ability to elicit innate and adaptive immune responses.

Our a-priori hypothesis was that NVP-INC280 schizophrenia patients would show an increased prevalence of the nontaster phenotype compared with controls. The genotypes of two nonsynonymous coding single-nucleotide polymorphisms in TAS2R38 were assayed for 176 schizophrenia patients and 229 healthy control individuals, and the two-allele haplotypes were estimated. There was an over-representation of the major PTC nontaster haplotype among patients of European descent, relative to control individuals of similar ancestry.

Patients and controls of African ancestry did not differ. The PTC nontaster haplotype is a genetic marker that may be used to identify subsets of schizophrenia patients who potentially harbor vulnerability genes in this region of chromosome 7q. Psychiatr Genet 22:286-289 (C) 2012 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.”
“Chagas disease is a major endemic disease caused by the protozoan parasite Trypanosoma cruzi. This parasitic disease is widely distributed throughout Latin America, affecting 10 million people. There are also reports of canine infection in the southern part of the United States. Dogs are considered the predominant domestic reservoir for 7: cruzi in many

areas of endemicity. In Mexico, Pitavastatin in vivo dog infection by this parasite has been poorly studied. In this work 209 dogs from six villages in Jalisco, Mexico, were assessed to detect anti-T cruzi antibodies by ELISA and Western blot. Seventeen (17) seropositive dogs (8.1 %) were detected by both tests, representing a seropositive value similar to that found in some southern states of Mexico where the infection is present. No statistical differences were observed concerning the age and sex of infected and non-infected dogs. The major antigens recognized by positive sera were 26, 32, 66 and 80 kDa. These proteins are candidates to develop a specific diagnostic method for canine Chagas.

No antibodies against HSP16 protein were found in 7: cruzi seropositive sera. This is the first report of canine serology of Chagas disease in this central part of Mexico. This report will contribute to the knowledge of the infection status of domestic reservoirs in this website the state of Jalisco, Mexico. (C) 2014 Asociacion Argentina de Microbiologia. Published by Elsevier Espana, S.L. All rights reserved.”
“Background: Slug, a regulator of epithelial mesenchymal transition, was identified to be differentially expressed in esophageal squamous cell carcinoma (ESCC) using cDNA microarrays by our laboratory. This study aimed to determine the clinical significance of Slug overexpression in ESCC and determine its correlation with clinicopathological parameters and disease prognosis for ESCC patients.

Access through a 9-French sheath was necessary to introduce the Amplatzer Vascular III plug. Three-dimensional transesophageal echocardiography (3D-TEE) was used to guide the operator and evaluate the severity of regurgitation postimplantation. Results: In total seven consecutive patients (mean age 72.8 +/- 5.6 years, 86% male) with a history of mitral valve (n = 6) or aortic valve Bcl-2 apoptosis replacement and severe PVL, underwent transapical PVL reduction using seven plugs in total (diameter 10-14 mm). Preprocedural median logistic

EuroSCORE was 28.5% (range 17.1-41.1%) and NYHA functional class was >= 3 in all patients. The procedure was successful in all patients, with a median fluoroscopic time of 18.7 min (range 10.1-29.6 min). Postprocedure 3D-TEE showed occlusion of PVL in three patients, and significant reduction in three patients. Postprocedural

complication was a hematothorax requiring surgery in one patient. Median hospitalization duration selleck chemicals llc after the procedure was 5 days (range 5-59 days). At 3-month follow-up one patient died, functional class and LDH did not differ significantly and there was a significant increase in hemoglobin. Conclusions: Transapical paravalvular leak reduction might be a good or rather attractive alternative in high-risk patients for major re-do cardiac surgery. (C) 2012 Wiley Periodicals, Inc.”
“Cerebral venous and sinus thrombosis is a still underdiagnosed cause of stroke, with an incidence of about 2.8 events per 100,000 person-years in young women and about 1.3 events per 100,000 person-years in the general population. Puerperium, oral hormonal contraception, and

coagulation disorders remain the most frequently identified risk factors. Initial treatment with heparin is the only proven therapy, although the evidence is based on only two randomized placebo-controlled trials which together included 79 patients. In the case of clinical deterioration under anticoagulation, local thrombolysis and mechanical thrombectomy may be considered, but clinical efficacy is supported only by case reports. Patients with imminent lateral herniation due to large hemorrhagic infarctions should be treated with prompt surgical decompression. Following the acute phase, oral anticoagulation is recommended for 312 months, and only patients suffering from CYT387 a severe coagulopathy or with recurrent cerebral venous and sinus thrombosis should be considered for long-term anticoagulation. Only insufficient experience is available for novel anticoagulants such as thrombin inhibitors or factor Xa antagonists.”
“Phenylthiocarbamide (PTC) taste sensitivity is an inherited trait determined primarily by allelic variation of the taste-receptor gene TAS2R38 on chromosome 7q. Results of prior studies examining the ability to taste PTC in patients with schizophrenia have been mixed because of the difficulties in measuring PTC taste sensitivity behaviorally.

On considering in vitro in vivo correlation (IVIVC), level A, the reference (R(2)=0.981) showed more linear relationship than the test (R(2)=0.918) due to the decreased dissolution and absorption rate of the formulation. This result suggests that the in vitro dissolution profiles and release kinetics might be useful in correlating absorption kinetics as well as overall plasma drug concentration time profiles for formulation studies.”
“Around 15% of colorectal cancers (CRCs) show microsatellite instability (MSI) due to dysfunction of the mismatch learn more repair system (MMR). As a consequence of this, MSI tumours tend to accumulate errors in mononucleotide repeats as

those in genes implicated in repairing double-strand breaks (DSBs). Previous studies have shown that irinotecan (CPT-11), a chemotherapy agent inducing DSB, is more active in MSI than in microsatellite

stable (MSS) CRC. The purpose of this study was to compare the sensitivity to CPT-11 in a series of CRC cell lines with either proficient or deficient MMR and to assess the mutational status of two DSB repair genes, MRE11 and RAD50, in these cell lines. hMLH1-deficient cell lines due to either epigenetic silencing or mutation showed very similar IC(50) and were four-to nine-fold more sensitive to CPT-11 than the MSS line. Cell lines harbouring mutations in both MRE11 https://www.selleckchem.com/products/gdc-0994.html and RAD50 were most sensitive to CPT-11. We conclude that MSI cell lines P505-15 purchase display higher sensitivity to CPT-11 than MSS cells. Mutation of MRE11 and RAD50 could account for this difference in response to CPT-11. Future clinical trials tailoring chemotherapy regimens based on microsatellite status are warranted.”
“Lumbar vertebrae are complicated in structure and function. The purpose of this study was to investigate the in-vivo motion characteristics of different portions of the lumbar vertebrae during functional activities.

Motion of L2, L3 and L4 was reproduced using a combined dual fluoroscopic and MR imaging technique during flexion-extension and left-right twisting of the trunk. The ranges of motion (ROM) of the proximal vertebra with respect to the distal one at 3 representative locations: the center of the vertebral body, the center of the spinal canal and the tip of the spinous process were measured. Centers of rotation (COR) of the vertebrae were then determined by calculation of the points of zero motion in 2D sagittal and transverse planes. During flexion-extension, the center of the vertebral body moved less than 0.6 mm, while the tip of the spinous process moved less than 7.5 mm in the sagittal plane. The CORs of both L23 (L2 with respect to L3) and 134 were located inside the vertebral body, at a distance about one-third the length of the vertebral body from the posterior edge. During left-right twisting, the center of the vertebral body moved less than 1.0 mm, while the tip of the spinous process moved less than 1.6 mm in the transverse plane.

This finding proves that CK2-phosphorylation of eIF3j is a prerequisite for its association with the eIF3 complex. Expression of Ser127Ala-eIF3j mutant impairs both the interaction of mutated j-subunit with the other eIF3 subunits and the overall protein synthesis. Taken together our data demonstrate that CK2-phosphorylation of eIF3j at Ser127 promotes the assembly of the eIF3 complex, a crucial step in the activation of the translation initiation machinery. (C) 2015 Elsevier B.V. All rights reserved.”
“Hypoxia-inducible transcription factors HIF-1 alpha and HIF-2 alpha can contribute to pulmonary

hypertension and vascular remodeling, but their mechanisms remain unknown. This study investigated the role of HIF-1 alpha and HIF-2 alpha in pulmonary artery endothelial and smooth muscle cells. The exposure of human pulmonary artery endothelial cells (HPAECs) NU7441 in vitro to hypoxia (10% O-2 or 5% O-2) increased proliferation over 48 hours, compared with cells during normoxia (21% O-2). The adenovirus-mediated overexpression of HIF-2 alpha that is transcriptionally active during normoxia (mutHIF-2

alpha) increased HPAEC proliferation, whereas the overexpression of HIF-1 alpha, which is transcriptionally active during normoxia (mutHIF-1 alpha), exerted no effect. The knockdown of HIF-2 alpha decreased proliferation during both hypoxia and normoxia. Both HIFs increased migration toward fibrinogen, used as a chemoattractant. selleck In an angiogenesis tube formation assay, mutHIF-2 alpha-transduced cells demonstrated increased tube formation, compared with the mutHIF-1 alpha-transduced cells. In addition, the tubes formed in HIF-2 alpha-transduced cells were more enduring than those in the other groups. In human pulmonary artery smooth

muscle cells (HPASMCs), chronic exposure to hypoxia increased proliferation, check details compared with cells during normoxia. For HPASMCs transduced with adenoviral HIFs, HIF-1 alpha increased proliferation, whereas HIF-2 alpha exerted no such effect. Thus, HIF-1 alpha and HIF-2 alpha exert differential effects in isolated cells of the human pulmonary vasculature. This study demonstrates that HIF-2 alpha plays a predominant role in the endothelial growth pertinent to the remodeling process. In contrast, HIF-1 alpha appears to play a major role in pulmonary smooth muscle growth. The selective targeting of each HIF in specific target cells may more effectively counteract hypoxic pulmonary hypertension and vascular remodeling.”
“In Mainland China, many selection criteria for hepatocellular carcinoma (HCC) liver transplantation, such as the Hangzhou, the Chengdu, and the Fudan criteria, have been established.

female has not been studied yet.\n\nResults: Primary cerebellar granule neurons (CGNs), isolated from P7 male and female mice (CD-1) segregated based on visual inspection of sex, were exposed to 2 h of oxygen glucose deprivation (OGD) followed selleck products by 6-24 h of reoxygenation (Reox). Mitochondrial membrane potential (Delta psi(m))

and cellular ATP levels were reduced significantly in XX CGNs as compared to XY CGNs. Mitochondrial DNA (mtDNA) content was increased (>2-fold) at 2 h OGD in XY CGNs and remained increased up to 24 h of Reox compared to XX neurons and normoxia controls. The expression of mitochondrial transcription factor A (Tfam), the nuclear respiratory factor-1 (NRF-1) and the peroxisome proliferator-activated receptor gamma coactivator-1

alpha (PGC-1 alpha), a master regulator of mitochondrial biogenesis, were up-regulated (2-fold, ***p < 0.001) in XY CGNs but slightly reduced or remained unchanged in XX neurons. Similarly, the TFAM and PGC-1 alpha protein levels and the mitochondrial proteins HSP60 and COXIV were increased in XY neurons only. Supportively, a balanced stimulation of fusion (Mfn 1 and Mfn 2) and fission (Fis 1 and Drp 1) genes and enhanced formation of donut-shaped mitochondria were observed in XY CGNs vs. XX neurons (**p < 0.01).\n\nConclusions: Our results demonstrate that OGD/Reox alters mitochondrial biogenesis CBL0137 and morphological changes in a sex-specific way, influencing neuronal injury/survival differently in both sexes.”
“BACKGROUND: Prenatal exposure to methylmercury (MeHg)

and polychlorinated biphenyls (PCBs) has been associated with impaired performance on attention tasks in previous studies, but the extent to which these cognitive deficits translate into behavioral problems in the classroom and attention deficit/hyperactivity disorder (ADHD) remains unknown. By contrast, lead (Pb) exposure in childhood Stem Cell Compound Library has been associated with ADHD and disruptive behaviors in several studies.\n\nOBJECTIVES: In this study we examined the relation of developmental exposure to MeHg, PCBs, and Pb to behavioral problems at school age in Inuit children exposed through their traditional diet.\n\nMETHODS: In a prospective longitudinal study conducted in the Canadian Arctic, exposure to contaminants was measured at birth and at school age. An assessment of child behavior (n = 279; mean age = 11.3 years) was obtained from the child’s classroom teacher on the Teacher Report Form (TRF) from the Child Behavior Checklist, and the Disruptive Behavior Disorders Rating Scale (DBD).\n\nRESULTS: Cord blood mercury concentrations were associated with higher TRF symptom scores for attention problems and DBD scores consistent with ADHD. Current blood Pb concentrations were associated with higher TRF symptom scores for externalizing problems and with symptoms of ADHD (hyperactive-impulsive type) based on the DBD.