coli lipopolysaccharide ( Araújo et al , 2010) Despite the low n

coli lipopolysaccharide ( Araújo et al., 2010). Despite the low number of BMDMCs, ultrastructural analysis showed the repair of damaged lungs, suggesting a possible role of paracrine release of trophic factors by, or induced by, BMDMC. In this line, Aslam et al. (2009) demonstrated that the administration MSC-conditioned media was able to reproduce the effects of cell delivery

in a hyperoxia induced pulmonary ALI model. It has been reported that IL-6 and IL-1β can regulate neutrophil trafficking during the inflammatory response by orchestrating chemokine production and leukocyte apoptosis (Fielding et al., 2008). In the current study, BMDMC therapy yielded a reduction in the level of IL-6 and IL-1β at day 1, with a further decrease in IL-6 at day 7 in CLP group, which click here may result in a decrease in neutrophil infiltration (Fig. 8). Conversely, IL-10 levels increased after BMDMC administration at

days 1 and 7, with no significant differences between early and late time of analysis. IL-10 has been reported to inhibit the rolling, adhesion, and transepithelial migration of neutrophils contributing to reduce the inflammatory process (Perretti et al., 1995). Similarly, Nemeth et al. (2009) have proposed that the beneficial effects of MSC in experimental CLP induced sepsis were due to the increase in IL-10 production. In contrast, Mei et al. (2010) observed that systemic IL-10 levels E7080 clinical trial were not increased by MSC treatment. These differences may be attributed to the moment of cell administration resulting in a different cytokine profile. In this line, MSCs were delivered 24 h before (Nemeth et al., 2009) and 6 h after CLP-induced sepsis (Mei et al., 2010) whereas, in our study, BMDMCs were injected 1 h after sepsis induction. Recently, Toya et al. (2011) showed that progenitor cells derived from human embryonic stem cells ameliorated

sepsis-induced lung inflammation ADP ribosylation factor and reduced mortality, though these cells did not change the production of IL-10. Thus, not only the moment of cell administration, but also the cell type may contribute to different anti-inflammatory responses. The administration of BMDMC therapy early in the course of the injury yielded a more favourable cytokine profile in the lung, contributing to an efficient control of the inflammatory injury, reducing the amount of alveolar collapse and preventing static lung elastance changes. Collagen fibre content increased at day 1 in the CLP-SAL group, which may be attributed to the higher degree of alveolar epithelial (Dos Santos, 2008 and Rocco et al., 2009) and endothelial lesion (Chao et al., 2010), as well as increased expression of TGF-β, PDGF, and HGF. These growth factors influence mesenchymal cell migration, extracellular matrix deposition (Adamson et al., 1988, Dos Santos, 2008 and Rocco et al., 2009) and epithelial repair.

Individuals’ deviations from optimality predictions in auction th

Individuals’ deviations from optimality predictions in auction theory thus fit a more general account that involves

an evolved, and thus adaptive, psychological state in humans where social cues are weighted strongly in decision-making (Perreault et al., 2012 and Toelch et al., 2013). The balance between social and personal information is then established through trial and error learning (Behrens et al., 2008 and Richerson learn more and Boyd, 2004). Common value auctions, for example, demand a reliance on individual information (estimated price and estimation error) and a neglect of competitors’ bids to bid optimally. It is thus possible that some auction experiments create environments where our proclivity to harvest social information leads to suboptimal decisions as seen in overbidding. Several explanations have been proposed to explain overbidding in all-pay auctions (Sheremeta, 2013). Bounded rationality for example predicts that competitors increase overbidding with higher endowment. While it is possible that our per round endowment of seven Euro influenced overall overbidding rates, this explanation is not sufficient to explain the within player differences because endowments were equal across items respectively preferences. The utility of winning, as mentioned above, is also a possible cause for overbidding. While we cannot fully exclude this possibility, GSK-3 inhibitor overbidding is happening rarely in the low preference condition. Here, only few players

increase their bids over the course of the experiment. If winning an item yielded a higher utility, we again would expect similar effects across preference levels. The two aforementioned

effects could potentially scale with the initial preference of the player resulting in stronger effects for high preference items. Another alternative proposed in the literature Methocarbamol is the escalation of commitment (Staw, 1981) where competitors once committed to an action will increase their investment. The social dynamics observed in our experiment could strengthen the escalation, particular if the two competitors have similar private value estimates (as in the PV± condition) and start overbidding each other. The escalation of commitment led to sunk costs for both players, which in turn reduced the propensity of a competitor to change their preference. Further investigations in this issue will reveal how exactly sunk costs and escalation of commitment interact with preferences. In conclusion, our results highlight the fact that private value estimates of others, revealed through competitive interactions, contribute significantly in establishing one’s own true preferences. As preferences change frequently in our experiment, a major question that arises is how lasting these newly established preferences are. Uncovering how competitive interactions modulate general preferences, not only for single items, can further aid our understanding of human preference formation. This work was supported by the Einstein Foundation.

Wilcoxon’s paired sample signed rank

Wilcoxon’s paired sample signed rank this website test revealed that 6 of 11 DOM parameters differed between up and downstream of golf courses ( Fig. 4). Specifically, DOM downstream of golf courses was relatively higher in one microbial humic-like (C5, p = 0.001), one terrestrial humic-like (C2, p = 0.012), and protein-like (C7, p = 0.005) marker and lower in one microbial humic-like (C6, p = 0.024), one terrestrial humic-like (C3, p = 0.001) marker with an overall loss in the humic content of the DOM pool (HIX, p = 0.017). These differences were subtle and these patterns were

not evident for the multivariate DOM group. The DOM group was similar up and downstream of golf course facilities (Pillai’s T = 1.3, p = 0.276) but significantly different among streams (Pillai’s T = 6.8, p = 0.001; Fig. 2C). Post hoc comparison revealed that DOM characteristics at GC1 were significantly different than

GC3, GC4, and GC6. GC2 significantly differed from all streams, except GC1. DOM characteristics between GC3, GC4, GC5, and GC6 were similar ( Fig. 2C). Benthic parameters were more variable than water column parameters between streams and sampling points (Table 4). Leaf ergosterol content (a fungal biomass indicator) and epilithic algal biomass (Chlrock) ranged from 0.6 to 22.5 μg Erg. mg−1 AFDW leaf and www.selleckchem.com/products/dinaciclib-sch727965.html 0.8 to 10.6 μg Chl a cm−2 rock, respectively. N2 flux and Rleaf ranged from 18.8 to 171.9 μg-N2 h−1 g−1AFDW leaf and 22.0 to 146.8 μg-O2 h−1 g−1AFDW leaf, respectively. k exhibited the least variance, ranging from 0.015 to 0.030 d−1. These benthic parameters were similar up and downstream of golf courses based on Wilcoxon’s paired sample rank tests ( Fig. 5). Closer inspection Idelalisib cost of these paired data, however, revealed that k, ergosterol, and Rleaf deviate from zero but in different directions among sites. These patterns were captured in the benthic multivariate group comparison, which had a significant interaction between stream and sampling

location (Pillai’s T = 1.95, p = 0.050; Fig. 2D). Trajectory analysis indicated that this interaction was significantly influenced by the magnitude and direction of the golf course response among and within streams ( Fig. 6). The magnitude (multivariate distance) between up and downstream sampling points differed between GC5 with GC2 (p = 0.05), GC3 (p = 0.07), and GC6 (p = 0.05). The direction of benthic multivariate change from up to downstream sampling locations differ between GC1 and GC5 (p = 0.06) and GC4 and GC6 (p = 0.05). The landscape group correlated positively with the benthic group (r = 0.30, p = 0.022). Water quality and DOM groups did not correlate with the benthic group. The best dimensional representation (partial least squares; PLS) of the landscape group and that of the benthic group correlated strongly (r = 0.90, p < 0.001; Fig. 7A).

This research was financially supported by the European Union thr

This research was financially supported by the European Union through the project DCI-ENV/2008/152-147 PD-1/PD-L1 signaling pathway (Nep754) “Community-based land and forest management in the Sagarmatha National Park” that was coordinated by University of Padova, CESVI, and Nepal Academy of Science and Technology. “
“In processing the impacts of human activity (which may be regarded as allogenic, different from but comparable to the effects of climatic or tectonic transformations), alluvial systems have their own temporal and spatial patterns of autogenic

activity. Anthropogenically related changes in discharge or sediment supply are routed through catchment systems, which then adjust their morphology and internal sediment storages ( Macklin and Lewin, 2008). For deposition, there is a process hierarchy involved: small-scale strata sets representing individual events (laminae for fine sediment), evolving form units (e.g. point bars or levees), architectural ensembles (such as those associated with meandering or anastomosing rivers) and alluvial complexes involving whole river basin sequences. Anthropogenic alluvium (AA) may be seen at one level as simply an extra ‘blanket’ to a naturally formed channel and floodplain system; at another it is a complex of supplements and subtractions to an

already complicated sediment transfer and storage system. AA may alternatively be known as post-settlement alluvium (PSA), although that term is generally applied to any sedimentation that occurs after an initial settlement date, however it was generated (cf. Happ et al., 1940). PSA also forms selleck compound a sub-category of legacy sediment (LS) derived from human activity ( James, 2013), which includes colluvial, estuarine and Miconazole marine deposits. AA may comprise waste particles derived from industrial, mining and urban sources (e.g. Hudson-Edwards et al., 1999) or, more generally, a mixture with ‘natural’ erosion products. Accelerated soil erosion resulting from deforestation and farming also introduces sediment of distinctive volume as well as character. For sediment transfers,

UK tracer studies of bed material demonstrate a local scale of channel and floodplain movement from cut bank to the next available depositional site (Thorne and Lewin, 1979 and Brewer and Lewin, 1998). However, vertical scour in extreme events without lateral transfer is also possible (Newson and Macklin, 1990). Fine sediment behaves rather differently: long-distance transfers in single events, temporary channel storage in low-flow conditions, but longer-term storage inputs highly dependent on out-of-channel flows. In these circumstances, considerable care has to be exercised when interpreting AA transfer and accumulation, and especially in using combined data sets for depositional units that have been processed to arrive on site over different timespans.

There is however a strong correspondence between AA and the devel

There is however a strong correspondence between AA and the development of open field systems in the mediaeval period, with 53% of AA units in the UK formed within the last 1000 years (Fig. 2). In Fig. 3 AA units are plotted by UK regions, with the first appearance of AA in southeast, central, southwest and northeast England, and in central and south Wales at c. 4400–4300 cal.

BP. AA in southeast, southwest, central England Natural Product Library cell line as well as in Wales is associated with prehistoric farming. In southwest England and Wales there was significant AA formation during the mediaeval and post-mediaeval periods. AA in southern Scotland and northwest and northern England appears to be associated with mediaeval land-use change. In Fig. 4 AA units

are sub-divided according to catchment size where study sites are located. Most dated AA units fall either in catchments of <1 km2 http://www.selleckchem.com/products/BIBF1120.html or are found in ones with drainage areas that are >100–1000 km2. The smallest catchments (<1 km2) have no dated AA units before c. 2500 cal. BP and most occur after c.1000 cal. BP. It is also perhaps surprising how few 14C-dated anthropogenic colluvial deposits there are in the UK, making it difficult to reconstruct whole-catchment sediment budgets. AA units from the larger catchments (>100 km2) show a greater range of dates with the earliest units dating to c. 4400 cal. BP. Fig. 5 plots AA units according to sedimentary environment. Channel beds (Fig. 5A) record earlier-dated AA, whereas AA units in palaeochannels (Fig. 5B), on floodplains (Fig. 5C) and in floodbasins

(Fig. 5D) increase in frequency from c.4000 cal. BP, and especially in the mediaeval period. One possible explanation for the early channel bed AA units is that channel erosion PIK-5 or gullying was contributing more sediment than erosion of soil, and that this was a reflection of a hydrological rather than a sediment-supply response to human activities (cf. Robinson and Lambrick, 1984). The earliest coarse AA unit in the UK uplands is dated to c. 2600 cal. BP (Fig. 6) with 73% of gravel-rich AA formed in the last 1000 years, and a prominent peak at c. 800–900 cal. BP. Fine-grained AA units in upland catchments have a similar age distribution to their coarser counterparts, and 80% date to the last 1300 years. By contrast, AA units in lowland UK catchments, outside of the last glacial limits, are entirely fine-grained and were predominantly (69%) formed before 2000 cal. BP, especially in the Early Bronze Age and during the Late Bronze Age/Early Iron Age transition c. 2700–2900 cal. BP. Fig. 7 plots relative probability of UK AA classified according to their association with deforestation, cultivation and mining. The age distributions of AA units attributed to deforestation and cultivation are similar with peaks in the later Iron Age (c.2200 cal. BP).

Each such vignette presented a possible choice

(e g dona

Each such vignette presented a possible choice

(e.g. donating to charity that would save one life in one’s own country vs. donating to a charity that would save a greater number in a foreign country), and participants were then asked to rate the wrongness of failing to choose the more FK228 molecular weight utilitarian option. Note that in contrast to the classical personal dilemmas, in these new ‘greater good’ dilemmas higher wrongness ratings indicated a more utilitarian view (α = .77). As a behavioral measure of impartial altruism, participants were given the opportunity to actually donate to charity part of a bonus fee that they received for taking part in the study. In addition to a participation payment of $0.50, participants were offered “a bonus fee of up to $1.00, of which you can choose how much to keep and how much to donate to one out of several of the leading charities dedicated to eliminating serious disease and poverty in the third world, according to the Giving What You Can Research

Centre. According to this respected Research Centre, BMN 673 cost even small donations to these charities will actually contribute to saving lives in developing countries. Correlational analyses were conducted to explore the relationship between perceived wrongness in the sacrificial personal dilemmas, perceived wrongness in the new ‘greater good’ dilemmas, primary psychopathy, and actual altruistic donations (see Table 6): i. As in the previous studies, psychopathy was associated with reduced wrongness ratings of ‘utilitarian’ actions in the personal dilemmas (r = −.32, p < .001), but was not associated with rates of genuinely utilitarian judgment in the ‘greater good’ dilemmas (r = −.02, p = .73). We next conducted a factor analysis to explore the internal relationship

Nutlin-3 ic50 between the 4 personal and 7 ‘greater good’ dilemmas. First, the factorability of the 11 dilemmas was examined. The KMO measure of sampling adequacy was .75, above the recommended value of .6, and Bartlett’s test of sphericity was significant (χ2 (55) = 535.69, p < .001). Given these indicators, factor analysis was conducted with all 11 items. Principle components analysis using direct oblimin rotation was used, and three significant factors were extracted: the first factor (eigenvalue = 2.67) explained 24% of the variance, the second factor explained 22% (eigenvalue = 2.37), and the third factor explained 11% (eigenvalue = 1.17). The analysis revealed that the four personal dilemmas loaded onto the first factor, with all of the ‘greater good’ dilemmas loading onto the second and third factors (see Table 7). This loading pattern indicated that the personal moral dilemmas used in the previous studies loaded well together (henceforth the personal harm factor). The second factor consisted of the new ‘greater good’ dilemmas concerning a strong component of self-sacrifice (henceforth the impartiality vs. self-interest factor).

g pointbar deposits, deserted channels, and abandoned oxbow lake

g. pointbar deposits, deserted channels, and abandoned oxbow lakes), (2) and floodplain cover deposits, formed by vertical accretion of fine sediments in slow-moving floodwaters of the

basins. Cover deposits are widespread along the flanking zone from Jacobabad to Manchar Lake, in the southeast around Mirpur Khas and Umarkot, and in the delta (Holmes, Sunitinib price 1968). The historical Indus River sent off distributaries and small seasonal spillway channels toward its flanks and across the delta. Such smaller-scale channels are characterized by levees rather than by river bars and meander scrolls. Levees of the Ghar and Western Nara (Fig. 1) are ∼3 m high due to periodic overspill of their A-1210477 in vitro banks and define these 3 km-wide paleochannels. Narrower channels and shorter wavelength meanders define former courses of the

Indus: the Khairpur at between 4 km and 8 km; Shahdapur at 5 km; and the Warah at 6 km (Fig. 1). The modern Indus is wider with larger but fewer meanders (∼14 km wavelength). Sinuosity of the paleo-Indus channels (Fig. 1 and Fig. 2) had a range from: (1) Badahri: 1.51, (2) Warah: 1.55, (3) Kandhkot: 1.65; (4) Puran: 1.81, (5) Shahdadkot: 1.99, (6) Eastern Nara: 2.05, (7) Khairpur: 2.33, and (8) Shahdadpur: 2.51. The modern Indus has sinuosity values ranging from 1.1 to 2.0 with a mean value of 1.8 (see discussion below). Paleochannels therefore had similar or sometimes greater sinuosity. The visible record of paleochannels represents only the last ∼1000 years. The remotely sensed topography of Fig. 2 perhaps captures some of the longer record of river avulsion and floodplain development and demonstrates how the floodplain aggrades through major avulsions of the trunk Indus. The large channel belt switches leaving behind 1–3 m of super-elevated channel belt deposits that shed crevasse-splay fingers

and fans interweaving with cover deposits to their sides (Fig. 2, Fig. 3, Fig. 4 and Fig. 5). An interesting feature of the imaged floodplain topography is its fan-like appearance (Fig. 2 and Fig. 5). When viewed along valley profiles (Fig. 3), these fan-like waves have a first order wavelength of 29 km, upon which is superimposed a second Vasopressin Receptor order set of waveforms with wavelength of ∼3.6 km. We suggest that the first order waveform reflect the avulsion frequency of the main Indus River (on the order of several centuries). Major avulsions shift the loci of floodplain deposition suddenly, leaving behind these first-order super-elevated fan lobes (see Fig. 2B). Whereas the second-order scale features perhaps relate to decadal occurrence of floods that build up intermingled crevasse deposits around the larger paleochannel features (Fig. 5). The width and depth of the modern Indus and other paleochannels are well demonstrated in both strike sections (Fig. 4) and plan view (Fig. 5).

In 2010, most of the reach was heavily infested with non-native P

In 2010, most of the reach was heavily infested with non-native Phragmites ( Fig. 3); native Phragmites is not known to occur within the stretch of river covered for this study and therefore was not considered. Some samples were collected within short river reaches (2–10 km) that are located in bird sanctuaries, such as the Audubon Society’s Rowe Sanctuary. Those sites are heavily managed with bulldozing, plowing, and herbicide application AZD6244 price to eliminate vegetation, particularly Phragmites, within the channel. The discharge of the Platte River varies widely on seasonal and interannual timescales, depending on weather conditions and management decisions. In 2010, flow conditions were “average” for

modern times. Monthly mean flow in July during sample collection was 69 m3 s−1 (U.S. Geological Survey, 2013). Local discharges varied between sampling localities,

depending on whether the river was locally more braided (more channels with lower discharge per channel) or less braided (fewer channels with higher discharge per channel). Sampling sites were all within the active selleck compound channel, i.e., on islands or bank-attached islands within a major braid of the river and distributed along the 65-km reach in order to average over variable local channel conditions (Fig. 2). Unvegetated sites were necessarily close together because few were available. Each site was at least 15 m2 so that cores could be collected a minimum

of 1 m in from the bank and have a distance of at least 3 m from other Cobimetinib in vivo cores within the same site. Three ∼30 cm subaerial sediment cores were collected at each site. Most of the cores (31 of 35) were collected from surfaces with elevations of <20 cm above water level in the channel. The goal was to minimize hydrologic differences between sites. However, four cores were collected from surfaces between 20 and 40 cm above water level because of site limitations. Cores were collected in a manner that ensured minimal sediment disruption. Immediately after collection, cores were sectioned at 10 cm intervals and sections were placed into individual specimen cups for transport to the lab. Standard loss-on-ignition techniques (Dean, 1974) were used to determine dry density and weight-percent of organic matter and carbonate of the sediments. To extract ASi, we followed the method of Triplett et al. (2008) to ensure complete dissolution of resistant phytoliths: dried sediments were digested in 0.2 M NaOH at 85 °C, with aliquots removed at 10, 20, 30, 45, 60, and 90 min. Concentrations of DSi in those solutions were measured as SiO2 on a Cary-50 UV–vis spectrophotometer as molybdate reactive silica, with standards ranging from 0.25 to 10 mg l−1 (Conley and Schelske, 2001, DeMaster, 1981 and Krausse et al., 1983). ANOVA statistical tests were used to evaluate the effect of presence and type of vegetation on ASi concentration.

To see how these structural disruptions in the mature niche may a

To see how these structural disruptions in the mature niche may affect SVZ neurogenesis, we performed whole-mount IHC staining using antibodies against DCX, Ank3, and acetylated tubulin. We used coordinate-stitching confocal software to acquire Z stack images over the entire ventricular surface, which allowed us to simultaneously assess Ank3/multicilia status and their relationships to newborn neuroblasts traveling in chains beneath the ventricular surface. Confocal images of DCX staining from control P28

mouse ventricular surface revealed robust migratory chains of neuroblasts (Figure 7A). In contrast, iKO mice injected with tamoxifen at P14 and sacrificed at P28 showed significant defects in the coverage of neuroblast chains along the ventricular wall Selleckchem AZD5363 (Figures 7B and 7C). Since the Foxj1-CreERt2-targeting

p38 MAPK activity strategy generated mosaic populations of mutant and unaffected ependymal cells, we were able to largely avoid the appearance of hydrocephalus harvesting brains 2 weeks after tamoxifen injection (Figure 7B). In some animals we did observe hydrocephalus, as indicated by the enlargement of ventricular surface during tissue harvesting, and this phenotype correlated with extensive removal of ependymal Ank3 expression as confirmed by IHC staining and confocal analysis (Figures 7C and 7D). We inverted the dark-field whole-mount DCX neuroblast images and noted in red, areas where we observed continuous patches of Ank3 defects (accompanying Figures 7B and 7C). After analysis in several tamoxifen-injected iKO mice, we could not find intact DCX+ migratory chains in areas that showed extensive ependymal Ank3 loss (Figures 7B and 7C and data not shown). We observed that on the borders between unaffected ependymal regions and cells with depleted Ank3 expression, DCX+ neuroblast chains became disrupted (Figure 7D and Figure S8D). Predictably, these defects along the ventricular wall led to significant decrease in cellularity/size of the rostral migratory stream in P28 OBs after P14 tamoxifen induction (Figure 7E). It is

interesting to note that 2 weeks after tamoxifen injection, Ank3 expression was often more affected from Foxj1 deletion than surface multicilia, perhaps reflecting the relative turnover rates of each in mature ependymal cells (Figure 7D and Figure S8C). 3-mercaptopyruvate sulfurtransferase Consistent with the dramatic reduction in DCX+ neuroblasts, Ki67 staining on coronal sections where large areas of ependyma were targeted showed decreased SVZ proliferation (Figure S8E). To understand whether the iKO phenotypes may be partly due to inducible targeting of SVZ NSCs, we performed lineage-tracing experiments in foxj1-CreERt2; r26r-tdTomato mice. We reasoned that if Foxj1-CreERt2 can mediate significant recombination in mature SVZ NSCs after niche formation, we should see tdTomato+ lineage-traced neuroblast chains along the ventricular wall.

When considering this study’s results, it will be important to co

When considering this study’s results, it will be important to consider that its results are unable to distinguish between these two explanations. By judicious pruning of networks, Konopka et al. (2012) define modules that each contain genes with highly correlated levels and that each have an eigengene, an expression profile that best represents Buparlisib nmr the module. Whether modules are preserved across species or across brain regions is then tested by comparing their eigengenes. The human coexpression data were summarized by 42 modules: 15 frontal pole modules, 6 caudate nucleus modules, 2 hippocampus modules, and a further 19 modules that were not representative

of a specific brain region. The chimpanzee data and macaque data produced similar numbers of modules (34 and 39, respectively). We will briefly describe an exemplary module in order to present the challenges faced by Konopka et al. (2012) in explaining

these modules in molecular and cellular terms. This will be a human caudate nucleus module given the colorful name “Hs_brown.” As this is one of only four modules that exhibit relatively high levels of preservation in the caudate nucleus of both KRX-0401 in vitro chimpanzee and macaque, it appears to capture genes whose expression levels are characteristic of this brain region in all three primates. To explore the biological meaning of Hs_brown, Konopka et al. (2012) inspected hub genes, those that exhibit the highest interconnectivity in this module. The set of such genes included five whose proteins are characteristic of mouse dopamine Drd1 or Drd2 receptor striatal neurons and a further four genes that are involved in regulation of G protein-coupled receptor protein signaling. These nine genes

are, however, only a small fraction of this module’s complete set of 232 genes. Thus, although the characteristic biology of the Hs_brown module clearly includes contributions from genes whose expression is characteristic of striatal neurons and that encode signaling regulators, Isotretinoin these features are far from being explanatory of the complete module. Of the 15 human frontal pole modules, approximately half (53%) are human specific, whereas the equivalent fractions in chimpanzee or macaque are smaller (43% and 17%, respectively). This is interpreted as reflecting increased transcriptional complexity in human frontal pole. However, as we explain above, these results may also reflect human-specific differences in cell type populations in the frontal pole. For example, the known higher proportion of white matter in the prefrontal cortex (Schoenemann et al., 2005) may explain some of the differential gene expression observed for the human frontal lobe.