All posts by Marian R Glancy

This review examines recent data on the combined use of mTOR inhi

This review examines recent data on the combined use of mTOR inhibitors and CNIs, with a particular focus on TAC, the most widely used CNI. Pharmacokinetic interactions, exposure–response relationships, and key randomized clinical studies using concentration-controlled dosing of these agents Rapamycin are reviewed. The oral bioavailability of mTOR inhibitors is low (14% for SRL and 20% for EVR) [19]. SRL and EVR are both metabolized extensively by cytochrome P (CYP)-450 3A in the liver and intestines, and affected by the different activities

of the drug efflux pump P-glycoprotein, which leads to the low bioavailability observed with these drugs [18] and [20]. In renal transplant patients receiving escalating single oral doses of SRL (3–21 mg/m2) in combination with CsA and corticosteroids, the maximum concentration (Cmax) ranged between 14 and 344 μg/L, and was reached (tmax) in 0.5 to 3 h [21]. In renal transplant patients receiving single oral doses of EVR (0.25 to 25 mg) in combination with CsA and corticosteroids, Cmax was found to be between 2.3 and 179 μg/L and reached in 1 to 2.2 h

[18]. Unlike dosing with SRL, however, where the dose correlates only modestly with either Cmax or with area under the curve (AUC) [21] and [22], EVR displays dose-proportional pharmacokinetics with rapid absorption leading to attainment of peak blood concentrations within 1–2 h after oral dosing [18]. Demographic factors, such as sex, age, or body weight do not affect the pharmacokinetics of EVR or SRL in adults [23] and [24]. With EVR, steady state is reached within 4 days with an accumulation in blood levels of 2-

to 3-fold compared with the exposure after the first dose [19] and [25]. In de novo renal transplant recipients receiving EVR, CsA, and corticosteroids, steady-state Cmax, C0, and AUC showed a dose-proportional increase. This steady-state, before dose-proportional effect was maintained over 1 year [23]. Importantly, the predose C0 of EVR correlated well with AUC over the year-long study. This demonstrates that C0 provides a simple, reliable index for the TDM of EVR [23] and [26]; a similar relationship has been observed for SRL [20], [21] and [22]. As over 75% of EVR and 94% of SRL in blood is sequestered into erythrocytes, whole-blood samples are appropriate for measuring systemic levels and for TDM [18] and [21]. Around 98% of EVR is excreted as metabolites in the bile and the remainder in the urine. EVR has an elimination half-life of approximately 30 h [19]. Prescribing information recommends EVR be administered twice daily (bid) in transplant recipients, mainly because of the CsA/EVR interaction described in the following section; however, preliminary evidence in renal transplant recipients suggests similar efficacy (e.g.

This in vitro study had a randomised and blinded design Tokens o

This in vitro study had a randomised and blinded design. Tokens of poly(methylmethacrylate) resin were fabricated according to the manufacturer’s instructions. After this, the surface roughness was measured and the tokens were randomly divided into 12 groups for the biofilm assays. Biofilms of one reference strain and two clinical isolates of C. albicans (ATCC 90028, P01 and P34) and C. glabrata (ATCC 2001, P11 and P31) were allowed to develop on token surfaces. Control and experimental groups were formed. FLZ at 2.56 μg/mL, the concentration bioavailable

in saliva, 15 was added to the medium of the experimental group. The biofilms were developed for 48 h, and the bioactivity was evaluated using an XTT (sodium 3′-[1-(phenylaminocarbonyl)-3,4-tetrazolium]-bis (4-methoxy-6-nitro) benzene sulfonic acid hydrate) reduction colorimetric learn more assay. Confocal scanning laser microscopy (CLSM) and transmission selleck chemicals llc electron microscopy (TEM) were used for cellular structure analyses. Tokens were fabricated using acrylic resin polymerised by a hot water bath

(QC-20 PMMA – Dentsply Ltd., Weybridge, England), according to the manufacturer’s instructions, at room temperature (25 ± 1 °C) and 50 ± 5% (relative humidity) under aseptic conditions, using a metal matrix (10 mm diameter and 2 mm thick). The tokens were immersed in distilled water at 37 °C for 12 h for residual monomer release.16 Then, the tokens were ground using progressively smoother aluminium oxide papers (320, 400 and 600 – grit) in a horizontal polisher (model APL-4; Arotec, Sao Paulo, Brazil). Next, the tokens were disinfected with 70% alcohol, washed twice with sterile distilled water and then ultrasonicated for 20 min to remove any contaminates and residues from the surface. Surface roughness of the acrylic resin tokens was measured using a profilometer (Surfcorder SE 1700; Kosaka Laboratory Ltd., Kosaka, Japan) accurate to 0.01 μm with a total measurement length of 3.2 mm and 0.5 mm/s. Three readings were made for each token, and a mean value was calculated.17 The average surface

roughness obtained Cell press was 0.31 ± 0.02 μm. Biofilm assays were performed using two reference strains: C. albicans ATCC 90028 and C. glabrata ATCC 2001 and two clinical isolates of each strain (P01 and P34) and (P11 and P31), respectively. The clinical isolates were obtained from the surface of the acrylic prosthesis of patients without symptoms of oral candidosis. Before the experimental procedures, the identity of all isolates was reconfirmed by the CHROMagar®Candida test (Difco Laboratories, Detroit, MI, USA) and the carbohydrate assimilation test using the Vitek-2 identification system (bioMérieux, Marcy l’Etoile, France). 18 Prior to each experiment, each Candida strain was grown aerobically on Sabouraud dextrose agar at 37 °C for 18 h.

Querying the libraries’ role opens other questions, such as those

Querying the libraries’ role opens other questions, such as those around access to the information holdings. How much of the marine information, beyond the professional, peer-reviewed

commercial journals and books (i.e., monographs), is digitized? This question involves an understanding of the prevalence and importance of grey literature, defined as “that which is produced at all levels of government, academics, business and industry in print Adriamycin solubility dmso and electronic formats, but which is not controlled by commercial publishers. In general, grey literature publications are non-conventional, fugitive and sometimes ephemeral publications”, and include a wide range check details of materials (Grey Literature Network Service, 1999). It is an important genre of information (EIUI, 2013). Are the massive grey literature holdings of most marine libraries largely digitized or being digitized? Is archival material (e.g., older data records and reports, books and proceedings from symposia, annual reports, cruise and expedition reports, photographs, personal journals) of much value in our networked world, where instant access to new information is the new gold standard, and the value of older and historical materials is

often under-appreciated? Are marine science libraries simply no longer required in our brave new digital world? Lately, the focus of the debate in Canada has been largely on the network of science libraries run by the Department of Fisheries and Oceans or DFO (Munro, 2013 and Nikiforuk, 2014;

next It has been galvanized by pictures of dumpsters full of discarded data reports and books, images of people hauling away their treasured finds, and descriptions of chaotic sorting and culling of library collections. The DFO is the lead department for ocean research, ocean management, and management of all freshwater and marine fisheries, with a mandate under the Fisheries Act, the Oceans Act, the Species at Risk Act and others. All of these mandates are information intensive. The closure of seven of eleven of its libraries has purportedly led to savings of slightly under half a million dollars per year and seven or eight staff positions. However, the costs to the remaining two “core” libraries of servicing researchers and students across the country or from other countries have not been taken into account. As well, the once world renowned network of marine and aquatic libraries under their care has been lost. From St. John’s, Newfoundland, to St.

, 2009 and Yang, 2012) However, while attempts have been made to

, 2009 and Yang, 2012). However, while attempts have been made to develop a theory-driven model and test it on a large sample of adults, the current study has acknowledged limitations. We examined information seeking behaviour using online survey technology, however, a laboratory study would enable more complex information

seeking behaviour to be assessed. Moreover, an experimental approach could be used to examine whether information processing styles can be influenced by priming or other contextual variables, thus providing more opportunities to examine moderation effects. Finally, different decision contexts, e.g. other kinds of everyday decisions as well as infrequent decision, or decisions with more serious consequences, would add to theoretical and practical developments. In conclusion, this study suggests that individual differences in preferences for analytical and heuristic selleck kinase inhibitor information processing style have a direct effect on information seeking, and influence the extent to which information is sought. In contrast, regulatory information processing styles have an indirect association with information seeking. Preferences for delaying decisions were exacerbated by information utility and attenuated by anxiety. These findings contribute to a more complete understanding of the decision processes that lead to information

seeking. Moreover, the findings suggest that information campaigns could be made effective by providing sufficient

information to generate an emotional need to make timely decisions. Sotrastaurin clinical trial We are grateful to the EPSRC for funding the current study (Grant number EP/E01951X/1). ”
“The corresponding authors regret that there is a mistake in the acknowledgement about the funding bodies. The project number “(Y1H093Y01)” after “National Natural Scientific Foundation of China” was wrong, it should be “(31070915)”. ”
“The corresponding author regrets that the acknowledgements section was not published. The full acknowledgments section should be: This work was supported by The European Social Fund (European Union Operational Programme Human Capital), the Foundation for Polish Science START and Ministry of see more Science and Higher Education scholarships and the Polish National Science Centre research Grant #2011/03/N/HS6/01051 to the author. I would like to thank Piotr Sorokowski and Kasia Gwozdziewicz for the constructive feedback and their efforts and support throughout the data collection process and Dominika Kras for proofreading. ”
“Dietary caloric restriction (CR) is defined as a limitation of food intake below the ad libitum level without malnutrition and it is well known to extend the maximum lifespan in a wide range of different organisms. Experiments in animal models have demonstrated that caloric restriction (CR) is able to either slow down or prevent the progression of several age-related pathologies (Gonzalez et al.

The two following accidental scenarios are considered, which are

The two following accidental scenarios are considered, which are assumed to occur in the Gulf of Finland Selleck Ibrutinib during ice-free season: 1. a spill of 5000 tons of medium oil; A

comparison of the results of the probabilistic model presented in this paper with the two other models for oil spill cleanup-costs estimations are depicted in Fig. 3. As for the calculations completed using the equation adapted from Etkin (1999), the relevant factors used along with oil type and spill size are the following: Shoreline oiling modifier: −59% (moderate) Oil type: +40% (light/heavy fuel) Clean-up methodology factor: +61% (mechanical manual only) Spill size modifier factor: 1 (spill size of 5000 ton) Resulting clean-up cost in euro 12.1M Full-size table Table options View in workspace Download as CSV In this case Etkin’s model delivers one number as an outcome, and the parameters are defined without much ambiguity. When it comes to the calculations using the equation provided by Shahriari and Frost (2008), the density used for the oil is 0.895 kg/m3 and the preparedness level Selleck PF 2341066 given for the Baltic Sea is 3. In the second scenario we analyze the clean-up costs for a spill of 30,000 tons of heavy oil. The size of the oil spill is chosen to symbolize the largest

oil spill that the Authorities in Finland can hypothetically deal with. The results, which are obtained with the use of three models, are depicted in Fig. 4. In the calculations completed using the equation by Etkin (1999), the other factors along with oil type and spill size are the following: Shoreline oiling modifier: +127% (major) Shoreline oiling modifier: −59% (moderate) Oil type: +52% (heavy crude) Clean-up methodology factor: +61% (mechanical manual only) Spill size modifier factor: −86% (spill size larger than 15,000 ton) Resulting clean-up cost in euro 144M for major shoreline oiling 46M for moderate shoreline oiling 95M – mean value of

the above two Full-size table Table options View in workspace Download as CSV In this case, at least one parameter Etomidate in Etkin’s model cannot be determined exactly. This results in an outcome featuring a large spread. The additional values used in the equation by Shahriari and Frost (2008) are 0.93 kg/m3 as the density of heavy oil, and 3 for the preparedness level. As the analyzed scenarios are hypothetical, and there has been no record of the clean-up costs of a significant oil spill in the Gulf of Finland made available to us, we do not posses any data to confront our model with. Therefore, we are forced to compare the obtained results with the models, which claim to be supported by empirical data. The proposed model shows good agreement with two existing models. Despite the extensive use of experts’ knowledge in development, which involves numerous assumptions, we managed to obtain a model that provides promising results.

The distributions of halocarbons in the Amundsen and Ross Seas ar

The distributions of halocarbons in the Amundsen and Ross Seas are mainly influenced by the presence of sea ice. This is supported by several findings: find more halocarbon concentrations in surface waters in ice-covered areas exceeded those of the biologically productive surface layer in the two polynyas; elevated concentrations of halocarbons were measured in brine; and surface waters in open waters were under-saturated with respect to bromoform. The halocarbon distribution in the two seas differed considerably, mainly due to the large

Ross Sea polynya and the formation of high salinity shelf water in the western Ross Sea. Halocarbons were found not to be a homogenous group of compounds, and they could be divided into two groups depending on the halogen involved. Iodinated compounds, with relatively shorter environmental half-lives in sea water, could be related to the abundance of Phaeocystis in the Ross Sea, whereas

brominated forms may be related more to community processes in conjunction with the unique physical environment provided by ice and snow. Saturation anomalies for the sea water/air and ice/brine/air systems also showed that sea ice was a major source of naturally produced halocarbons for the atmosphere, and in particular CHBr3 and CH2ClI. It can be concluded that the surface mixed layer of Antarctic seas acts both as a source and a sink for volatile halogenated organic carbons. The following are the supplementary data related to this article. Supplementary material.   Incubation data from 7 ice stations and absolute limit of detection. We thank the officers and crew of JNK inhibitor the R.V.I.B. Oden for their help during the cruise, as well as our OSO 2007 colleagues. We especially thank Daniel Barrdahl for assistance during the expedition. This research was supported by NSF grants ANT-0741380 and ANT-0836112 to

WOS, the Swedish Research Council, Knut och Alice Wallenbergs Foundation, and the Swedish Polar Research Secretariat. Section plots were made in Ocean Data View ( Schlitzer, 2011). ”
“Due to its biological necessity, iron (Fe) is a key resource for marine phytoplankton (Geider and La Roche, 1994) and is considered as the limiting nutrient in a number of oceanic regions (Moore et al., 2013). These include the classic MycoClean Mycoplasma Removal Kit high nutrient low chlorophyll regions of the Southern Ocean (de Baar et al., 1995), equatorial Pacific (Martin et al., 1994), sub-Arctic Pacific (Martin and Fitzwater, 1988) and to a lesser extent seasonally in the North Atlantic (Nielsdóttir et al., 2009). Moreover, Fe can also regulate the rates of nitrogen fixation by diazotrophs in tropical regions (Schlosser et al., 2014). Accordingly most ocean general circulation and biogeochemistry models (OGCBMs) that seek to represent ocean biogeochemical cycling, including those concerned with climate change, represent Fe. The process of organic complexation by molecules known as ligands is a key feature of the ocean Fe cycle.


Women’s Health Initiative Observational Study (WHI-OS


Women’s Health Initiative Observational Study (WHI-OS)38 examined as many as 23 variables, but did not investigate cognitive, nutritional, or blood measurement variables. In this study, all factors, with only 5 exceptions, were found to be associated with frailty in bivariate analyses, consistent with those reported in the WHI-OS. Other studies also have reported positive associations of frailty with age, stroke, COPD/asthma, visual impairment, and anemia.2, 18, 19, 39, 40 and 41 Interestingly, both Akt inhibitor this study and the WHI-OS found that cancer was not associated with frailty. Depression in particular appeared to be an important contributor, in agreement with other studies.16, 17, 18, 42 and 43 On the other hand, the association of cognitive impairment with frailty, as reported in other studies,12, 44 and 45 was observed only in bivariate analyses, but failed to be selected in the final model, plausibly because it was substituted by depression, stroke, and congestive heart failure, with which it also shares common pathophysiologic factors, such as atherosclerosis and chronic inflammation.46 and 47

Inadequate dietary intake and nutritional PLX4032 deficiencies are considered important causes of age-related sarcopenia, dynapenia, and frailty.48 and 49 Studies have shown that obesity, increased number of micronutrient deficiencies and low serum beta-carotenoids were significant risk factors for frailty,13 and 22 although one study using a detailed dietary questionnaire failed to demonstrate that low energy intake was significantly associated with frailty.49 Our study shows that in place of these nutritional variables, a simple screening measure of poor nutritional risk was independently associated with frailty. Elevated levels of immune markers of chronic inflammation, such as CRP and IL-6, Neratinib ic50 have been shown to be associated with frailty. In turn, circulating IL-6 level is inversely

associated with hemoglobin concentration in frail older adults, and low hemoglobin has been found to be independently associated with frailty. WCC is a well-recognized cellular marker of systemic inflammation and found in 2 studies to be associated with greater risk for cardiovascular disease, mortality, and frailty.15 and 20 Our study replicates the significant independent association of increased WCC with frailty. These results hence support the use of hemoglobin and WCC as simple, inexpensive, and routinely available clinical indicators of systemic inflammation and age-associated immune system decline associated with frailty. The 13 independent predictors selected in the final regression model represent an essential set of salient clinical risk indicators of prefrailty and frailty. It is noteworthy that these frailty risk factors are reflective of multiple system involvements for frailty.

Sublethal doses can cause lesions that include hepatocellular hyp

Sublethal doses can cause lesions that include hepatocellular hypertrophy, intracytoplasmic eosinophilic inclusions and apoptosis (Guzman and Solter, 2002). However, it is well known that MCYSTs can also affect other organs and tissues (Humpage, 2008; Wang et al., 2008). Moreover, several studies have confirmed that prolonged exposure to low doses can promote tumors

in tissues such as the colon, skin and liver (Falconer and Humpage, 1996; Ito et al., 1997). These toxins can enter the cell through a group of organic anion transporting polypeptides (OATP). Members of the multispecific OATP family can be detected in nearly all tissues in humans, rodents E7080 manufacturer and other animals, although they are less expressed in most non-liver Epacadostat concentration cells (Fischer et al., 2005). They play an important role in the absorption, distribution and excretion of numerous xenobiotic molecules (Hagenbuch and Meier, 2003). Recently, Fischer et al. (2010) described different affinities between MCYST congeners and specific

OATPs. Kidney expresses OATPs and is one of the organs affected after exposure to MCYSTs (Wang et al., 2008). It also plays a role in excretion of the toxin (Ito et al., 2002), but the mechanisms of nephrotoxicity are not completely known. Some in vitro studies on kidney epithelial cells showed that higher doses cause similar effects to those observed in hepatocytes, mostly related to cytoskeleton disarrangement (Khan et al., 1995 and Khan et al., 1996). Studies on Vero cells showed that a mild MCYST concentration leads to early effects (vacuolization) on endoplasmic reticulum, probably related to an autophagy process as part of a cell response to the aggression (Alverca et al., 2009). Moreover, those cells under lower concentrations showed increased proliferation, which suggests the potential tumor promotion effect of MCYST on renal cells (Dias et al., 2010). In renal tissue, maldevelopment of glomeruli and renal medulla was observed in fetuses from female rats injected find more intraperitoneally (i.p.) daily

with 62 μg/kg body weight (bw) for 10 days (Zhang et al., 2002). In addition, Nobre et al., 1999, Nobre et al., 2001 and Nobre et al., 2003 demonstrated the involvement of an inflammatory process on MCYST-derived nephrotoxicity in perfused rat kidneys. An increasing number of therapeutic agents has been recognized as nephrotoxic and a wide variety of chemical pollutants, along with environmental chemicals (mycotoxins and botanicals, for example), was already described causing renal toxicity (Goldstein and Schnellmann, 1996). However, although kidney seems to be an important affected organ, there is not much knowledge on the sublethal injurious effects of MCYST on renal physiology. Hence, this work assesses aspects of renal metabolism, oxidative stress and histopathology of Wistar rats exposed to a sublethal dose of purified MCYST-LR. Deionized water through Milli-Q resins (Millipore Corp., Marlborough, MA) was used to prepare all solutions.


they strongly suggest additional targets because


they strongly suggest additional targets because while NAC abolished ROS generation induced by QPhNO2 at 1 and 2 μM (Fig. 2), it did not inhibit the appearance of apoptotic features at the equal concentrations (Fig. 3 and Fig. 4). DNA is also recognized as a target of quinones. The cytotoxic effects of doxorubicin are generally related to its ability to damage cancer cell DNA, which is a consequence of its interaction and inhibition of DNA topoisomerase II, its induction of double-stranded DNA breaks, and its direct intercalation into buy ZD1839 DNA, modifying helical torsion (Ozben, 2007). The comet assay is a sensitive and relatively simple technique to quantify DNA damage in individual cells (Singh et al., 1988). HL-60 cells treated with nor-beta

did not display any DNA damage in the tested time frame and dosage. QPhNO2 showed a different profile, with concentration-dependent damage and frequency of damage after 3 and 24 h of treatment, especially at higher concentrations (10 μM) (Fig. 6). Doxorubicin, as expected, was a very strong genotoxic compound, increasing the DNA damage index and frequency at 0.5 μM (Fig. 6). Thus, QPhNO2 directly interacts with DNA but at higher concentrations than those necessary to induce apoptosis. Electrochemical methods (analytical and preparative) and electrochemical (thermodynamic Alectinib chemical structure and kinetic) parameters have been shown to be extremely useful in biomedical chemistry with respect to the mechanisms of biological electron-transfer processes. The high versatility of electrochemical methodologies allows the mimicking of a large spectrum of biological environments (Hillard et al., 2008). With this in mind, electrochemical MYO10 proof of the pro-oxidant activity of QPhNO2 and nor-beta was assayed using cyclic voltammetry in the presence of oxygen in aprotic media, which provided a good model of the membrane environment in which peroxidation processes take place (Ossowski et al., 2000). The electrochemistry of both quinones

in aprotic media on GCE and mercury has already been reported (de Souza et al., 2010 and Hernández et al., 2008). A detailed study of the influence of oxygen concentration on EpIc and IpIc of both quinones was performed, as described previously for lapachol and isolapachol ( Goulart et al., 2003 and Goulart et al., 2004). The addition of O2 to the system caused remarkable changes to the position of the first reduction peak potential (EpIc) as well as to the shape of the other waves of QPhNO2 ( Fig. 7A). The peak of oxygen reduction (EpO2) in this medium occurred at −0.894 V. These effects include a) an increase in the height and anodic shift of the first cathodic wave (Ic) (inset, Fig. 7A, which is related to the generation of the semiquinone, and b) a disappearance of the corresponding anodic wave (Ia) ( Fig. 7A).

The governance framework can then be used to encompass ecological

The governance framework can then be used to encompass ecological and economic valuation for communication and management decisions thus giving a sustainable management framework.

“In response to the increasing human impact on our oceans (Pew Oceans Commission, 2003, Ban and Alder, 2008, Halpern et al., 2008, Claudet and Fraschetti, 2010 and Lotze, 2010), legislation has been implemented world-wide to protect, conserve or enhance marine ecosystems, proposing integrative tools and methods to assess ecological integrity and marine health status (Borja et al., 2008). The United Nations Convention on the Law of the Sea (UNCLOS, 1982) is the international basic legal framework that governs the use of the oceans and seas, establishing an international Erlotinib in vitro obligation to protect and use the resources of the marine environment sustainably; it is further supported by the 1992 Convention on Biological Diversity (CBD, 2000). At a national HDAC inhibitor or regional level, several initiatives have been developed (for details, see Borja et al., 2008), such as: (i) Oceans Policy, in Australia; (ii) Oceans Act and Oceans Strategy, in Canada; (iii)

Oceans Act, in the USA; (iv) the Water Framework Directive (WFD, 2000/60/EC), and the Marine Strategy Framework Directive (MSFD, 2008/56/EC), in Europe; (v) the National Water Act, in South Africa; and (vi) several laws on water and ocean quality, in the People’s Republic of China. These initiatives try to make sustainable use of the seas compatible with the conservation of marine ecosystems and the maintenance of a good status for marine waters, habitats and resources. Status is assessed in an integrative way including measurement 2-hydroxyphytanoyl-CoA lyase of many components of the ecosystem together with physico-chemical parameters and elements of pollution. This approach is intended to provide an ‘ecosystem-based management’

of marine waters (Apitz et al., 2006, Barnes and McFadden, 2008 and Lester et al., 2010). This concept takes into account the structure, function and processes of marine ecosystems bringing together natural physical, chemical, physiographic, geographic and climatic factors, and integrating them with anthropogenic impacts and activities in the area concerned (Borja et al., 2008). To undertake such an assessment, the above-mentioned marine legislation requires adequate and rigorous monitoring at different spatial and temporal scales. Despite the importance of monitoring, in terms of non-compliance with a threshold and the subsequent need for (expensive) policy and managerial actions, the current global economic crisis, and especially cuts in government spending, are leading many countries (and industries) to try and save on their monitoring budgets (Borja and Elliott, 2013). This has added further motivation for investigating new, more cost-effective methods to monitor and assess marine waters (Frolov et al.