1A and B) The activation of the IRE1 and ATF-6 pathways occurred

1A and B). The activation of the IRE1 and ATF-6 pathways occurred at all SiO2-NP concentrations, whereas the activation of the PERK pathway occurred at the

two higher concentrations. The induction of ER stress can have several consequences for the cell. Either the cell can cope with the stress and restore normal cellular functions, or it will undergo apoptosis. Etoposide supplier To restore cellular functions and remove the unfolded proteins from the ER, chaperons become up-regulated, protein translation is inhibited and protein degradation increases. In case the ER stress is too strong and the cell cannot restore normal ER function, apoptotic pathways will be activated [37]. Therefore, ER stress is one mechanism contributing to the cytotoxicity of NPs. One important consequence of ER stress is the release of calcium from the ER lumen into the cytosol [11]. Increased calcium concentration in turn can have important consequences. One effect is the phosphorylation of the transcription factor CREB, which induces the transcription of protein phosphatase 2A (PP2A). Our data demonstrate the up-regulation of PP2A on the mRNA and

on the protein level by SiO2-NPs (Figs. 2 C and D). PP2A is involved in a wide range of cellular processes including cell cycle regulation, cell morphology, development, signal selleck screening library transduction, apoptosis and stress response [23]. Therefore, the induction of ER stress followed by up-regulation of PP2A has marked cellular effects. Previously, increased cytosolic calcium concentrations were reported in neuronal cells after silica NP exposure [3], and interpreted as an influence of the

nanoparticles on influx pumps. However, based on our data, the increased calcium concentration may also originate from the ER stress response. Induction of intracellular calcium transients was also found in human Calpain lung fibroblasts after exposure to silver nanoparticles [4]. Additionally, an increase in intracellular free calcium was observed after exposure of cells with TiO2-NPs [29]. Consequently, ER stress and associated alteration of calcium homeostasis triggering cellular toxicity may be an important effect underlying cytotoxicity of NPs. Furthermore, ER stress was also shown for other nanoparticles, including ZnO-NPs in human umbilical vein endothelial cells [8], poly(lactic-co-glycolic acid)-nanoparticles [22] and gold nanoparticles in human chronic myelogenous leukemia cells [43]. Activation of both the PERK and IRE1 pathways leads to regulation of the NFκB-IKK signalling pathway during ER stress through activation of IκB kinase (IKK) or degradation of the p65 unit [1]. The ATF6 branch of the ER stress response can also regulate NFκB activity [46]. We could also show the activation of NFκB in Huh7 cells after SiO2-NP exposure (Fig. 3A). Consequences of the activation of NFκB are the induction of INF-α [1] and TNF-α [30]. This was also observed in our experiments (Fig.

Then, because of the actions of various world leaders in being re

Then, because of the actions of various world leaders in being reluctant to acknowledge the underlying causes of environmental problems such as climate change, a seventh aspect was added, the political dimension (Elliott et al., 2007, Mee et al., 2008 and Atkins et al., 2011). We took the view that it does not matter if all other aspects were fulfilled, if the political leaders are not committed to sustainable development

and management then it will not happen. Recent developments have caused me to add three more aspects – culture, morals/ethics and communication Obeticholic Acid research buy to give a final list of 10-tenets ( Box 1). After publishing the earlier papers, we found there were parallels in this thinking from business management. A business has to consider its ‘political, economical, social and technological environment’, the so-called PEST analysis.

Business then modified these ideas and embedded them throughout many areas, for example compare these with the challenges in BBOP (2009) relating to habitat restoration. This included scientific, technical, ethical, philosophical, political aspects (STEPP) and also expanded PEST become PESTLE with law being added. Therefore, we can reverse this to say the business (organisation) and management of the marine environment has to accommodate the same aspects. The 10-tenets (Box 1) should be used to tackle Selleckchem IDH inhibitor any one marine environmental stressor and even cumulative or in-combination stressors but here as an example they are illustrated using nutrient pollution, its causes and consequences.

Of course, while we talk of ‘marine environmental management’, it is emphasised that we are not trying to manage the environment but more importantly to manage human behaviour. The aim of our management actions above all is to maintain the natural system by protecting the FER ecological carrying capacity and ecosystem structure and functioning for the intrinsic benefit of the ecosystem and to maintain ecosystem health. It is not sufficient to focus on the structure of the ecosystem, i.e. what is present in terms of number of species, abundance, standing crop, etc, but we have to maintain the ecological functioning, i.e. rate processes. We should also take the view that if we maintain and protect the marine physics (hydrography, bathymetry, hydrodynamics, geomorphology, sedimentology) and chemistry then a sustainable ecology will follow (Gray and Elliott, 2009). Of course this also relies on our ability not to unsustainably remove the biology, such as through overfishing.

The software identified in the jararhagin-treated

The software identified in the jararhagin-treated Src inhibitor HUVECs 59 up-regulated genes with fold changes greater than 1.5 and p values < 0.05 and 11 down-regulated genes with fold changes greater than −1.5 and p values < 0.05 compared to un-treated cells. Analyzing the results according to the inflammatory response induced by jararhagin on HUVECs, among these 59 up-regulated genes, 25 were related directly or indirectly with

the inflammatory response. Down-regulated genes with fold changes greater than −1.5 were detected in 7 genes corresponding to inflammatory mediators (the complete abbreviations and acronyms of each gene is shown in Table 1). Jararhagin up-regulated the expression of 14 important genes

involved in cell signaling and cell–cell interaction: E-selectin, VCAM-1, IL-8, IL-6, THBD, SULF1, CXCL-6, ANGPT2, CDKN1B, DTR, DAF, TLN1, CSF2RBIL, IL1RL1 (respective fold changes were 5.33; 2.75; 2.23; 1.97; 1.97; 1.95; 1.91; 1.88; 1.82; 1.75; 1.66; 1.64; 1.59; 1.54). Another gene group up-regulated by jararhagin is related to cell death, with expression of 20 genes: CD69, SAT, VCAM-1, IL-8, CEPBD, IL-6, THBD, SULF1, ANGPT2, CDKN1B, SOD2, DTR, PEG10, ARG2, GULP1, DAF, CSF2RB, ILRL1, BTG1, SH3BP5 (respective fold changes were 3.39; 3.23; 2.75; 2.23; 2.15; 1.97; 1.97; 1.95; 1.88; 1.82; 1.78; 1.75; 1.74; 1.69; 1.67; 1.66; 1.59; 1.54; 1.54;

1.53). A total of 10 Ibrutinib genes involved with inflammatory diseases were up-regulated by jararhagin: E-selectin, SAT, IL-8, CEBPD, IL-6, SOD2, MMP-10, ARG2, DAF, IL1RL1 (5.33; 3.23; 2.23; 2.15; 1.97; IDH activation 1.78; 1.73; 1.69; 1.66; 1.54). Real time-PCR was utilized to obtain the time-course of expression and quantitation of 8 genes from those up-regulated in microarray analysis. We chose representative genes in each one of the biological effects cited above: E-selectin, VCAM-1, IL-8, IL-6, CXCL-6, ANGPT2; CD69, VCAM-1 and MMP-10. The RNA was extracted from HUVECs at 3 different time-points (3, 6 and 24 h) after the treatment with jararhagin (200 nM). The cDNA was transcribed and quantified by real time PCR using the relative quantification method (2−ΔΔCT2−ΔΔCT). We performed the treatment of HUVECs with LPS 1 μg/mL as a positive control in our experiments, indicating that the cells were responsive and our sample was completely depyrogenated. LPS was used as positive control for our experiments once we selected genes for inflammatory response and it stimulates leukocyte and blood endothelium through the LPS recognition systems, binding with CD14 and transferring to TLR4 and MD-2 complex, resulting in the production of downstream inflammatory cytokines and leukocyte adhesion molecules by the activation of NF-κB and AP-1-dependent transcriptional pathways (Sawa et al.

Other improvements emerging are better and innovative fractionati

Other improvements emerging are better and innovative fractionation schemes, use of nanoLC approaches, new microfluidic enrichment or separation devices [23] and improvements in mass spectrometry. The majority of peaks observed in a biological sample by global but sensitive mass spectrometry-based analytical platforms are often still unknown as it is a highly challenging and time-consuming procedure to identify them [18•• and 24]. We expect that recent improvements in http://www.selleckchem.com/products/BIBW2992.html metabolite

identification/assignment software tools for a more efficient annotation and structure elucidation of the thousands of peaks typically obtained for a complex biological sample will yield many new metabolites [25, 26, 27, 28 and 29]. Although the general tendency is to analyze as many metabolites as possible in a given biological sample with the aim to obtain maximal biochemical information, this is not necessarily required in order to obtain insights into biological problems. Actually, Christians et al. recently suggested that screening for changes in selected metabolic pathways ALK inhibitor using a set of validated and quantitative analytical platforms would be more suited than a global metabolic profiling approaches, in which many computational and chemometric steps are needed to relate changes

in metabolic profiles to biochemical pathways [ 30]. The available biochemical information for a certain disease is used efficiently in such a biology-driven

approach. The global metabolomics strategy and the biology-driven approach are nicely exemplified in the recent work of Hazen and co-workers [ 31 and 32]. A global metabolomics Bacterial neuraminidase analysis of plasma revealed a pathway in both humans and mice linking microbiota metabolism of dietary choline and phosphatidylcholine to cardiovascular disease (CVD) pathogenesis [ 31]. It was found that plasma levels of three metabolites of dietary phosphatidylcholine — choline, betaine and trimethylamine N-oxide (TMAO) — are associated with increased risk of CVD. In a follow-up study, the gut microbiota-dependent metabolism of l-carnitine to produce TMAO in both rodents and humans was examined using a biology-driven approach [ 32]. Using stable isotope tracer studies in humans and animal models, the authors demonstrated a role for gut microbiota metabolism of l-carnitine in atherosclerosis pathogenesis. From the previous section it is clear that the total number of detectable yet identifiable compounds is extensive, indicating that efficient sample pretreatment techniques combined with complementary analytical platforms are minimally required in order to cover a significant fraction of the human metabolome [18••].

In a recent study, the widths of lateral ventricles (frontal horn

In a recent study, the widths of lateral ventricles (frontal horns) were monitored with TCS in 37 patients with intraventricular hemorrhage [46]. The authors reported a cut-off value for increase of lateral ventricular width of 5.5 mm that yielded high sensitivity (100%) and specificity (83%) in combination with a 100% negative predictive value for reopening of the external ventricular

or lumbar drainage. In conclusion, TCS can be regarded as a reliable tool for monitoring the midline shift, as well as the ventricular width in patients with acute supratentorial brain lesions who have adequate acoustic bone windows (>80% of patients). In many neurological and neurosurgical departments with appropriate expertise in neurosonology, TCS is already today routinely used for learn more this purpose. Becker et al. [47] were the first to describe the TCS finding of SN hyperechogenicity in PD patients (Fig. 2). In the past decade, this finding has been confirmed by a number of independent groups find more [23], [24], [25], [27], [28],

[48], [49], [50], [51], [52], [53] and [54]. This TCS finding, present in about 90% of PD patients at cross-section is independent from PD duration and severity [55] and [56], and was found to be stable in a 5-year follow-up study of PD patients [57]. Also there was no correlation found between the degree of SN hyperechogenicity and the striatal uptake of N-omega-fluoropropyl-2beta-carbomethoxy-3beta-4-[(123)I]iodophenyl-nortropane (FP-CIT) on SPECT, which is thought to represent a correlate for the degeneration of presynaptic dopaminergic neurons in PD [58]. These

findings indicate that SN hyperechogenicity is not a correlate of the progressive degeneration of SN neurons. However, a close correlation between SN echogenicity Aurora Kinase and tissue iron content has been shown in post-mortem studies of human brains [59], suggesting that SN hyperechogenicity in PD is at least in part, caused by an elevated iron content of the SN. Also in a number of other neurodegenerative disorders TCS was demonstrated to detect accumulation of trace metals (iron, copper, manganese) in the basal ganglia with higher sensitivity than MRI supporting the idea that TCS can display trace metal accumulation in deep brain structures [59], [60], [61] and [62]. On the other hand, increased iron content alone cannot be the only explanation for SN hyperechogenicity since iron accumulates over time in the SN of PD patients, and other iron-rich brain structures, such as red nucleus or globus pallidus internus normally show no increased echogenicity on TCS [2]. Therefore, additional factors, such as abnormal iron–protein bindings were proposed to contribute to SN hyperechogenicity [59].

, 10  and 11 Wada wymaga weryfikacji postnatalnej oraz wyklucze

, 10. and 11.. Wada wymaga weryfikacji postnatalnej oraz wykluczenia innych nieprawidłowości w zakresie dróg moczowych i pozostałych narządów w 1.–2. dobie życia. W sytuacji, kiedy

nie potwierdzono wady, konieczne jest wykonanie kolejnego badania USG za 4–6 tygodni, ze względu na znaczny odsetek Selleckchem Adriamycin fałszywie ujemnych wyników badania USG w pierwszych dobach życia. W przypadku potwierdzenia rozpoznania po urodzeniu dziecko wymaga dalszej diagnostyki w ośrodku specjalistycznym. Wskazaniem do wykonania cystouretrografii mikcyjnej jest nieprawidłowy obraz drugiej nerki w badaniu USG lub przebyte zakażenie układu moczowego. W ostatnich latach odstąpiono od rutynowej nefrektomii zmienionej torbielowato nerki 9., 10. and 11.. Torbiele nerki. Kontrolne badanie ultrasonograficzne dziecka, u którego nie potwierdzono postawionego prenatalnie rozpoznania torbieli izolowanych nerek, powinno się odbyć w 6. miesiącu życia. Kontrolne badanie ultrasonograficzne dziecka z potwierdzonymi torbielami izolowanymi nerki i wywiadem rodzinnym obciążonym ADPKD powinno być wykonywane co 6–12 miesięcy. Izolowane torbiele nerek (ITN) są rzadko wykrywane w prenatalnym USG i większość z nich zanika przed urodzeniem [12]. Izolowane torbiele nerki (ITN) należy odróżnić click here od rozpoznania torbielowatości nerek. ITN są stosunkowo rzadko

stwierdzane w wieku dziecięcym. Wielkość torbieli jest różna: od bardzo małych, aż do guzów namacalnych przez powłoki brzucha. Niclosamide W wieku dziecięcym wielkość torbieli rzadko przekracza 2 cm. Etiologia ITN nie jest znana [12, 13]. Nie stwierdzono

podłoża genetycznego choroby. Najczęściej są stwierdzane jednostronnie, chociaż Ryc. 3..  Postępowaniu przy podejrzeniu izolowanych torbieli nerki (ITN) Wady układu moczowego dotyczące zaburzeń struktury i ilości czynnego miąższu nerek, chociaż wykrywane są rzadko, częściej niż inne wady prowadzą do występowania przewlekłej choroby nerek u dzieci i młodzieży. Dzieje się tak szczególnie w przypadku dysplazji i hipoplazji nerek, a także ich torbielowatości. Właściwa diagnostyka i wyodrębnienie grup ryzyka może pozwolić na zastosowanie właściwego leczenia nerkoochronnego. Polskie Towarzystwo Nefrologii Dziecięcej we współpracy ze specjalistami urologii dziecięcej, diagnostyki obrazowej oraz diagnostyki prenatalnej podjęło próbę ustalenia zaleceń dla lekarzy zajmujących się dzieckiem w pierwszych miesiącach jego życia. W prezentowanym artykule omówiono schematy diagnostyki postnatalnej przygotowane w celu poprawienia skuteczności diagnostyki i współpracy wielospecjalistycznej w opiece nad dzieckiem z wadą wrodzoną układu moczowego. W stosowaniu prezentowanych algorytmów należy zachować rozsądne spojrzenie kliniczne skoncentrowane na dziecku i modyfikować je na podstawie występujących dodatkowych objawów i danych.

The use of dNTP analogues in mechanistic studies was reviewed in

The use of dNTP analogues in mechanistic studies was reviewed in 2010 by McKenna et al. [ 32], however, this team has recently augmented the dNTP analogue repertoire with a range of α,β-halomethylene-triphosphate systems ( Table 3, entry 2). These systems were prepared chemoenzymatically (e.g. α,β-CF2-dCTP) or using

the morpholidate method (e.g. α,β-CF2–dTTP) to study stereoelectronic effects within the triphosphate group through variation of the halo substituent and subsequent crystallographic studies in the presence of these non-hydrolysable Ganetespib datasheet analogues [ 33]. In earlier complementary works, McKenna and colleagues employed β,γ-bridge analogues that allowed perturbation of the pyrophosphate leaving group pKa [ 34•• and 35]. Fortunately, the β,γ-halomethylene-GTP analogues were substrates, and their kinetic activities were correlated Raf inhibitor using linear free energy relationships (LFER). Human DNA polβ incorporated β,γ-halomethylene-GTP against both cognate C and non-cognate T template residues, with the chemical step being rate-limiting in both cases. Unsurprisingly, cognate incorporation was markedly faster than non-cognate, however, individually,

the two sets of kinetic data correlated under LFER analyses. Reduced activities were measured for the bulkier dihalogen substrates where the template base was also influential in the magnitude of diminished activity. The detection of even lower catalytic activity for mispairs serves as a potential tool to explore the structural distinctions between transition states derived from cognate or non-cognate base incorporations. The use of substituted methylene bridges, -CXY- potentially introduces an additional stereogenic centre into β,γ-dGTP analogues (Table 3, entry 3). Crystallisation of DNA polβ in the presence of disasterometric mixtures of each of β,γ-CHF, CMeF and CClF dGTP analogues led to selective active site occupancy by the diastereomers that allowed the formation of CX-F-Arg183 hydrogen bonds [36]. Diastereomerically pure β,γ-CHF-dGTP

and β,γ-CHCl-dGTP were prepared and the R and S-configurational isomers were assessed kinetically [37]. R-diastereomers proved more proficient substrates than S, with the R-β,γ-CHF-dGTP being most effective, confirming the advantageous effect of the CX-F-Arg183 interaction [38•]. Synthetic methodologies for the preparation for of mRNA cap analogues have been developed to study biotechnologically and medicinally significant cap-dependent processes (Table 3, entry 4) [39, 40, 41 and 42]. The binding and hydrolysis of 5′-cap mimics by the cap scavenger from Caenorhabditis elegans (CeDcpS) were explored using a collection of methylenephosphonate, imidodiphosphate and phosphorothioate cap analogues, revealing regioselective β,γ-cleavage [ 43]. Recent examples include stereopure α-P-boranophosphate-ATPs that have shown anti-hepatitis C activity (Table 3, entry 5) [44] and selective agonism against the P2Y6 receptor (Table 3, entry 6) [45].

Renal transplants were performed only when AHG-CDC CXMs were nega

Renal transplants were performed only when AHG-CDC CXMs were negative. The potential recipients considered learn more during the DD events were classified into 5 groups according to their % PRA: Group 1 (0%), group 2 (1–19%), group 3 (20–79%), group 4 (80–100%) and group 5 (unknown PRA). The patients in group 5 (unknown) were included in the

deceased donor waiting list in a time period when the % PRA assay was not part of the regular practice in our setting. In our institution, kidney allocation to patients on the waiting list has been based exclusively on a negative T and B cells AHG-CDC cross-match, the time on waiting list and blood group (equal ABO group with the donor). Patients without vascular and peritoneal access for dialysis are considered emergencies and always have had priority in our setting. All of the patients that undergo a DD KT at out institution receive some modality of induction therapy, whether anti-CD25 monoclonal antibodies or thymoglobulin, PS341 and is mostly defined by the immunological patient risk. During this time period, the immunosuppression regimen for this group of patients consisted of tacrolimus, mycophenolate mofetil, and prednisone. Clinical information regarding 1-year post-KT graft function and/or the last graft function evaluation was

gathered from the corresponding patient records. Causes of graft loss and patient death were documented. The graft biopsy registry was analyzed to obtain the information regarding the total number of graft dysfunction

biopsies performed, and acute rejection events documented whether cellular, humoral or both. The histological analysis and diagnosis were performed using the current BANFF criteria at the time of the graft biopsy [11], [12], [13], [14], [15], [16] and [17]. Graft dysfunction was defined as SCr increase of ≥ 25% from baseline in the absence of an identified cause. The statistical analysis was performed using odds ratio with prior group stratification, logistic regression analysis, Kaplan Meier method and Log Rank. A p value < 0.05 was considered statistically significant with a confidence interval of 95%. For categorical variables, an analysis to determine frequencies, proportions, Chi2, and Spearman correlation coefficient was also performed. Fifty-eight DD events with a female to male ratio of 34:24 and a mean age of 35.4 ± 13.3 Baf-A1 were identified. The ABO group distribution among these donors was of 35 donors for group “O”, 13 donors for group “A” and 10 donors for group “B”. A group of 179 potential kidney transplant recipients was included in the analysis all of whom were older than 18 years of age, with a female to male ratio of 98:81 and a ABO group distribution of 127 patients for group “O”, 33 patients for group “A” and 19 patients for group “B”. The mean PRA for all the potential recipients was 22 ± 32%, median [md] 0 (0–98). Males had a mean % PRA of 11.7 ± 26 md 0 (0–97) vs. females with a mean % PRA of 30.9 ± 35 md 13.

We have described how knowledge of protein termini will facilitat

We have described how knowledge of protein termini will facilitate this by setting boundaries to the search space and acting as biomarkers defining the functional state of a protein. In the near future this will lead to exiting new biological insights into cellular and disease processes at a systems level and help close the gap between genotypes and phenotypes. Papers of particular interest, published within the period of review, have been highlighted as: • of special interest This work was supported by grants of the Canadian Institutes of Health Research; the Canadian Breast Cancer Research Alliance; the Canadian Breast Cancer Foundation; the Cancer Research

Society; a Canada Research Chair to C.M.O., the Michael Smith Foundation for Health Research,

selleck inhibitor the Breast Cancer Society of Canada, Alexander von Humboldt Foundation and the German Federal Ministry of Education and Research to P.F.L. “
“Current Opinion in Chemical Biology 2014, 23:23–30 This review comes from a themed issue on Molecular immunology Edited by Marcus Groettrup and Huib Ovaa For a complete overview see the Issue and the Editorial Available online 15th September 2014 http://dx.doi.org/10.1016/j.cbpa.2014.08.013 1367-5931/© 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). The incidence of autoimmune and autoinflammatory disorders is rapidly increasing in developed countries

[1]. Addressing this clinical need will require continued innovation in immunomodulatory drug BTK inhibitor development. Data from many sources, including analysis of how human genetic variation affects disease susceptibility, implicate aberrant cytokine production PLEKHB2 and signaling in the pathophysiology of these disorders (see Box 1 for background on the application of disease genetics to drug discovery). For example, mutations in the cellular machinery that processes the inflammatory cytokine interleukin-1β (IL-1β) to its mature form cause hereditary autoinflammatory diseases known as cryopyrin disorders (Figure 1a) [2]. Protein therapies inhibiting IL-1β (canakinumab; rilonacept) or its receptor (anakinra) are used to treat cryopyrin disorders, as well as immune disorders with more complex etiologies, including gout, type-2 diabetes, rheumatoid arthritis (RA) and chronic granulomatous disease [3 and 4]. The clinical success of biopharmaceuticals targeting IL-1β or other cytokines (TNF-α, IL-6, IL-12/23) derives from their ability to disrupt protein–protein interactions with exquisite selectivity and predictable, long-lasting pharmacology [5•]. The study of human genetics can uncover factors that contribute to the initiation and maintenance of disease, and suggest new strategies for therapeutic intervention.

The field began with the initial observation that the activity of

The field began with the initial observation that the activity of dopamine neurons resembles a reward prediction error from formal reinforcement-learning theory [4], and now subsumes an elaborate framework that can potentially account for the functions of many different parts of the brain. It is likely

that this approach will continue to be useful as we embark on the attempt to understand how different RL component processes are ultimately combined together to produce integrated behavior. Nothing declared. Papers of particular interest, published within the period of review, have been highlighted as: • of special interest This work was supported by an NIH Regorafenib chemical structure conte center grant on the neurobiology of social decision making (P50MH094258-01A1), NIH grant DA033077-01 (supported by OppNet, NIH’s Basic Behavioral and Social Science Opportunity Network) and National Science Foundation grant 1207573 to JOD. “
“Current Opinion in Behavioral Sciences 2015, 1:101–106 This Staurosporine review comes from a themed issue on Cognitive neuroscience Edited by Cindy Lustig and Howard Eichenbaum http://dx.doi.org/10.1016/j.cobeha.2014.10.007 2352-1546/© 2014 Published by Elsevier Ltd. The prefrontal cortex is often described as subserving decision-making and executive control.

Decision-making research focuses on the PFC function in action selection according to perceptual cues and reward values 1 and 2]. Executive control research focuses on the PFC function in learning and switching between behavioral rules or sets that guide action 1, 3, 4, 5, 6, 7, 8, 9 and 10]. These two lines of research have often been carried out independently. Here we review recent findings and outline a theoretical framework unifying these two conceptual approaches of PFC function. There is converging evidence that the computation of expected rewards driving action selection primarily involves the ventromedial PFC (vmPFC) 11, 12 and 13]. The vmPFC, especially its ventral portion (often referred to as the medial orbitofrontal cortex), enables to convert distinct subjective reward scales

into a ‘common currency’ scale for allowing value comparison 14, 15, 16 and 17] that drives selection. Reward values are generally associated with action outcomes rather than actions per se. Consistently, the Unoprostone vmPFC is involved in predicting action outcomes 18, 19, 20, 21• and 22], suggesting that the vmPFC encodes action-outcome associations for selecting actions according to reward values. By contrast, selecting actions according to perceptual cues involves the lateral premotor cortex 9, 23, 24 and 25]. However, when expected rewards and perceptual cues are not linked to specific actions, decisions are presumably made between more abstract action sets that may subsequently guide the selection of specific actions according to stimuli.