In addition to intrinsic changes in HSCs

In addition to intrinsic changes in HSCs, we also found a qualitative change to the BM niche, which likely contributes to the improved function of HSCs after SSA. Consistent with this, we have previously found that SSA can significantly improve hematopoietic reconstitution after HSCT (Goldberg et al., 2005, 2007, 2009), and here we could demonstrate that fewer ampa were needed for effective engraftment. There is some rationale for these findings, as (1) exposure of aged satellite stem cells to a young microenvironment reverses their age-related changes (Conboy et al., 2005), and (2) subsequently several studies have reported that circulating factors in young mice can reverse age-related defects in a number of tissues including heart, brain, and skeletal muscle (Loffredo et al., 2013; Sinha et al., 2014; Villeda et al., 2014). Pattern analysis of the changed genes within the stromal microenvironment revealed a distinct shift in gene expression after SSA from a profile characteristic of an aged mouse to that of the young by d10 after SSA. Of particular interest within this group was the gene Foxo1, which has been described in the development and differentiation of OBLs, regulating their expression of Runx2 and Bglap (Teixeira et al., 2010; Yang et al., 2011), and preventing differentiation of mesenchymal progenitor cells into fat or muscle (Nakae et al., 2003). Foxo1 has also been implicated with protection during aging (van der Horst and Burgering, 2007), with Foxo1-deficient mice displaying aberrant hematopoietic phenotypes resembling those seen with age; however, it is unclear whether these are intrinsic to HSCs or mediated through the BM microenvironment (Kim et al., 2008; Tothova et al., 2007). Consistent with these changes after SSA, the androgen receptor can directly bind the Foxo1 promoter and regulate its action, and FOXO1 can inhibit androgen receptor transcription (Liu et al., 2008; Ma et al., 2009). In addition, IGF-1, expression of which is almost completely abrogated after SSA, triggers the inactivation of FOXO1 by nuclear exclusion (Yang et al., 2011). Analysis of known hematopoietic niche interactions (Mercier et al., 2012) revealed upregulation following SSA of Spp1, Ang1, Cxcl12, Kitlg (Scf), Tgfb, Jag1, and Vcam1—many of which can be directly regulated by FOXO1 (Ferdous et al., 2011; Martinez et al., 2008; Potente et al., 2005).
Taken together, these data indicate that the widespread downstream impacts of SSA on lymphopoiesis are at least partially attributable to the considerable effects on primitive HSC function, thereby demonstrating mechanisms by which lymphopoiesis can be rejuvenated following SSA. Given that SSA can be achieved clinically, and reversibly, using currently approved agonists and antagonists of the sex steroid pathway (e.g., LHRH/GnRH), and that these improve immune function (Goldberg et al., 2009; Velardi et al., 2014), it has important implications for replenishing the diminished repertoire of lymphoid cells following damaging cytoablative treatments associated with bone marrow transplantation and cancer therapies. While the capacity for long-term BM regeneration following SSA has not yet been established, this work provides the basis for more detailed investigations into hematopoietic niche aging and SSA-induced rejuvenation, to develop more targeted strategies for HSC recovery.

Experimental Procedures

Author Contributions


Cartilage is an avascular, alymphatic, and aneural tissue (Mankin, 1982) that, consequently, has limited repair capacity. Therefore, cartilage damage requires clinical intervention. In the last two decades, cell-based therapies have emerged as promising treatment options. Autologous chondrocyte implantation (ACI) was first applied in 1994 and is still used to treat cartilage defects in human patients (Brittberg ampa et al., 1994). In ACI, however, chondrocytes are harvested from the patient, creating an additional cartilage defect. Moreover, before use, the chondrocytes require in vitro expansion, which causes the progressive loss of cartilage matrix gene expression (Benya et al., 1978; Mayne et al., 1976).

Microcephaly is a neurodevelopmental disorder

Microcephaly is a neurodevelopmental disorder where the head is smaller than the typical size during fetal development and at birth, with the circumference less than 2 SDs below the mean (Centers for Disease Control and Prevention, 2016b). Babies with microcephaly can have a wide array of problems such as developmental delays, seizures, vision and hearing loss, and feeding difficulty. To date, little is known about the mechanism underlying ZIKV-associated microcephaly. Since a normal SB 203580 hydrochloride develops from neural stem cells (NSCs) and their differentiated neural cells, microcephaly is most likely associated with the abnormal function of these cells. Yet, many questions remain to be addressed, such as how human fetal brain NSCs or their progeny are susceptible to ZIKV infection, whether different strains of ZIKV infect NSCs with equal efficiency, if such infection affects functions of NSCs important in human brain development, and whether NSCs from different human origins respond to ZIKV equally. Recent evidence shows that ZIKV directly infects NSCs of the fetus and impairs growth in mice (Li et al., 2016; Wu et al., 2016). It has also been shown that ZIKV infects neural progenitors from human skin-cell-induced pluripotent stem cells (Garcez et al., 2016; Tang et al., 2016), but these studies used the murine neuro-adapted prototype strain (MR766) belonging to the African lineage. A more recent study showed that a 2015 Puerto Rico strain of ZIKV, PRVABC59, infects and kills primary human fetal neural progenitors (Hanners et al., 2016). However, none of these studies investigated the effect of ZIKV on neural stem cell functions, particularly their differentiation into neurons and glial cells, which is critical for brain development.


Here, we established an in vitro system using primary human fetal brain-derived NSCs from three different donors to characterize the effect of ZIKV infection. We particularly focused on an Asian-lineage ZIKV strain, Mex1-7, that was involved in the first outbreak in North America in late 2015 in Chiapas State (Guerbois et al., 2016). Interestingly, we found that the Mex1-7 strain had a substantial lower infectivity (1.5%) in primary hNSCs when compared with other strains (10% by FSS and 8% by DakAr) tested in this study, as well as compared with the 1947 African lineage MR766 strain (20%–80% infection rate) and ArB41644 strain (40% infection rate) reported previously (Garcez et al., 2016; Tang et al., 2016; Simonin et al., 2016). The high infectivity of MR766 may be explained by the fact that it has been passaged for over 150 times in suckling mouse brains and developed a neuro-adapted phenotype, a concern addressed previously (Miner and Diamond, 2016). An alternative explanation is that African ZIKV strains may have a higher infectivity rate than Asian ZIKV strains. In this study, the FSS and DakAr strains used were passaged 3 and 7 times, respectively, only in mosquito and mammalian cell culture and not in neural cells. On the other hand, the source of NSCs may also contribute to the discrepant infectivity of ZIKV. For example, our observation of less than 10% cell infection rates are more in line with recent reports (Hanners et al., 2016). Both this, and the fact that our study used primary cultured human fetal brain NSCs may account for differences compared with Tang et al. (2016) and Garcez et al. (2016) who used neural progenitor cells derived from human skin-cell-induced pluripotent stem cells. However, all of these results indicate that the type of neural cells, the viral lineage/strain from different sources, and the viral propagation methods need to be considered when interpreting ZIKV infectivity and functional consequences in human cells.
Microcephaly may result from abnormal proliferation or differentiation of NSCs during early development (Homem et al., 2015). We thus established an in vitro system to characterize the effect of Mex1-7 on survival, proliferation, and differentiation of three primary human fetal NSC strains: G010, K048, and K054. These three cell strains were derived from three human fetal donors at gestational weeks 9 (K048) and 13 (K054 and G010), around the end of the first trimester of pregnancy and within the time frame with high risk of viral-mediated abnormal neural development, including ZIKV-induced microcephaly (Cauchemez et al., 2016). Further, Mex1-7 infections decreased the cell population in all three cell strains without significant changes in Cas3 or BrdU during the proliferation stage. The lack of change of Cas3 could indicate that, during the proliferative stage, cell-cycle progression is halted but cells are not undergoing apoptosis. Since only a small percentage of hNSCs are infected (1.5%), a bystander effect may be occurring to inhibit proliferation. Alternatively, a necrotic mechanism of cell death could account for the decreased population. The population decrease is in general accordance with the previous studies using either human embryonic stem cells or induced pluripotent stem cells (Dang et al., 2016; Garcez et al., 2016; Qian et al., 2016; Tang et al., 2016). In addition SB 203580 hydrochloride to these in vitro studies, two groups have also shown that ZIKV infection in pregnant mice leads to inhibition of neural progenitor proliferation in mouse embryos by cell-cycle arrest (Wu et al., 2016; Li et al., 2016). Further studies are warranted to dissect the mechanisms underlying ZIKV inhibition of NSC proliferation both in vitro and in animal models in vivo.

Gaikwad and Gupta associate acid mine drainage also known

Gaikwad and Gupta (2008) associate faah inhibitor mine drainage, also known as abandoned mine drainage, to the reaction of water and oxygen specifically with coal mining. Water passing through the rocks from mining operations that have been deposited on the surface and the underground voids left behind by mining activities causes the formation of acidic drainage effluents. This occurs by the reaction involving oxygen, water and pyrite sulfidic and non-sulfidic minerals to produce acid sulfate rich wastewater know as AMD. Kuyucak (2002) terms the AMD phenomenon as “acid rock drainage” (ARD) and notes that the same chemical reactions can take place in roads and bridge construction, and in the construction of tunnels through rock formations.
With the formation of net acidity, effluent water becomes increasingly laden with Fe, Mn, Al, Zn, Cu, Ni, Pb, As and Cd as the principle heavy metal contaminants. Ben and Baghour (2013) found that Cd is typically the most mobile and therefore has the highest bioavailability. Furthermore, the presence of microorganisms promoting geochemical processes together with mineral oxidation reduces the amount of dissolved oxygen in water (Bhattacharya et al., 2006).
Generally, the most common uses of algae as phycoremediators reported in the literature are their character of being alkalinity boosters rather than as direct absorbers. The removal of heavy metal contaminants by algae species assists in monitoring the levels of heavy metals in an environment. However, in terms of efficiency and ease of maintenance, the turnover of algae due to toxicity of the accumulated heavy metals makes continuous processes much more attractive. The performance of such systems over time is also more easily monitored. According to Costello (2003) many examples of these passive systems are operational and are still undergoing research to improve their functional characteristics.
The use of various algae strains to remove heavy metals from AMD has only more recently become the subject of closer scrutiny. Gok and Yel (2009) carried out studies of the kinetic characteristics of heavy metals uptake by microalgae. These characteristics would be of fundamental importance in designing effective and long-lasting phycoremediation systems. Perales-Vela et al. (2006) completed a study on heavy metals detoxification mechanisms in microalgae examining the biomolecular way by which the algae isolate and sequester those environmental materials to which they are exposed. They particularly examined the formation of metallothionein peptides in the algae.

Absorbent and adsorbent properties of algae biomass
The removal of heavy metals and sulphates by algae is very flexible. It depends on the metal type, the taxon and age of material (Novis and Harding, 2007). Optimum heavy metals and contaminants removal vary with season type (Elbaz-Poulichet et al., 2000; Brake et al., 2004). Seasons of the year can highly influence the contaminants removal because of parameters such as light and temperatures. Algae are very sensitive when it comes to parameters related to seasons such temperature and light intensity.
The absorbency and adsorbency mechanisms are commonly used by algae species to remove nutrients, heavy metals (depending on the specie type) and other minerals from wastewater. While these elements are removed from wastewater algae growth takes place because species need also nutrient elements to grow. Some are taken by the surface and other taken into the inner cells as presented in Fig. 1. According to Mehta and Gaur (2005), algae in aqueous solution is very effective for the removal of low concentration of metal ions and also bio accumulate these metals within their cells more specially in the cell vacuoles and/or in the intercellular spaces (Afkar et al., 2010; Chen et al., 2012; Kumar and Gaur, 2011). Cladophora glomerata and Oedogonium rivulare are amongst species used to continuously remove Co, Ni, Pb, Cd, Mn, Fe, Cr and Cu from wastewater (Vymazal, 1984).

br Conclusion This paper numerically investigates propagation characteristics of proposed

This paper numerically investigates propagation characteristics of proposed O-PCF, including confinement loss and sensitivity for a wide range of wavelength. The behavior of the proposed PCF for change of different parameters has been also investigated by using Water, Ethanol and Benzyne as analytes. The investigated results indicate that the increment of ring number increases sensitivity until a certain time and confinement loss is vice versa. Better performance of sensitivity and confinement are also shown through the increment of pitch value, air filling ratio, core diameter and inner ring diameter such as increment by ring number. The proposed PCF shows sensitivity: 45.05%, 46. 87%, and 47.35% and confinement loss: 6.63622×10, 2.28217×10, and 5.28542×10dB/m for Water, Ethanol and Benzyne analytes respectively at the wavelength λ=1.33μm. Our proposed O-PCF shows better performance for both sensitivity and confinement loss compared to prior O-PCF [33], H-PCF and S-PCF structures. So, it Tasquinimod is affirmed that it could provide new dimension for liquid sensing.

Financial support

Conflict of interest


The geometry or orientation of the optical setup has an impact on the detection of targeted and interfering fluorescence signals. Fig. 1 shows four different optical setup geometries utilized to excite and collect fluorescence signal. The geometry depicted in Fig. 1-a, which is widely used in fluorescent enzyme-linked immunosorbent assays (ELISA) or microfluidic devices, involves directly illuminating and collecting the signals from the top of the fluorescent analytes [16,17]. Similarly, the analytes in the Fig. 1-b geometry are also directly illuminated. However, instead of being collected directly, the signals are coupled into a transducer and transferred for detection [3,15]. Since the analyte solution contains a high concentration of interfering particles, the exciting light in Fig. 1-a and -b will not only illuminate the analyte but also those particles in the path of the exciting light, resulting in decreased sensitivity and specificity of the immunoassay.
The evanescent wave (EW), which is a near-field wave, has been utilized in biosensors for decades to generate fluorescence close to the surface of the transducer [10]. By using EW as the exciting light source, the biosensor is able to detect analytes in the presence of interfering particles (Fig. 1-c,d). The most commonly used transducers for the EW-based biosensor are the optical fiber and the planar waveguide. Compared to the previous two geometries, the EW not only can specifically excite the captured analyte, but can illuminate all analytes on the transducer simultaneously instead of in a limited area. To collect the entire excited signal, one of the most efficient ways is to detect the signal at the end of the transducer where all coupled signals are delivered to (Fig. 1-d) instead of directly detecting at the top of the analytes (Fig. 1-c). With high aspect ratio transducers such as an optical fiber, the signal density (intensity of signal per unit area) can increase due to the small area of the distal end; therefore, most optical fiber biosensors adopt this method [1,2,5–8,12,19], while waveguide biosensors primarily collect the signal directly from the top of the analytes [9,21].
During the last two decades, an alternative transducer, the silica capillary, has been used to improve the EW-based biosensor [4,14,20]. Since the capillary serves dual roles as a light propagator and a sampling vessel, no extra container is required. For the immunoassay application, the analytes are captured on the inside wall of the capillary; therefore, the capillary protects the sensing surface and eases handling of the immunoassay. Moreover, the capillary itself is the core part, and no etching is required. However, among all the EW-based capillary biosensors, most designs still adhere to the Fig. 1-c geometry [11,14]. The reason for this might be the difficulty in aligning the exciting laser with the thin wall of the capillary, which makes changing from probe to probe inconvenient. Therefore, using Fig. 1-c geometry can accomplish multiplex detection in one capillary but sacrifices sensitivity. To design a multiplexed capillary biosensor using the Fig. 1-d geometry, we present a novel EW-based microfluidic capillary fiber-optic biosensor (MCFOB). Multiple silica capillaries are embedded in a polydimethylsiloxane (PDMS) multichannel device to facilitate multi-sample detection, which also serve as cladding for the capillaries. Furthermore, the detection instrument is a fluorescence microscope with a CCD camera that uses a Xenon lamp as the exciting light source. Therefore the alignment of exciting light to a capillary is much easier, especially for changing from probe to probe, since the design does not use a capillary holder for Tasquinimod mounting on the detection instrument.

br La estabilidad de precios tasas de inter

La estabilidad de precios, tasas de interés y tipo de cambio en Estados Unidos y en la eurozona
Una moneda internacional, por definición, debe fungir adecuadamente como unidad de cuenta, medio de pago y depósito de valor, tanto dentro como fuera del país que la emite. De allí que los países que emiten monedas internacionales puedan obtener beneficios de señoreaje en dos ámbitos claramente diferenciables: el doméstico, cuando el dinero recién emitido se gasta en territorio nacional, y el foráneo, cuando el dinero de nueva creación se emplea para pagar importaciones o liquidar pasivos con el exterior. El ejemplo más destacado de este fenómeno es Estados Unidos, pues esta nación, gracias PR-957 la elevada demanda mundial de dólares, ha podido financiar una fracción importante de su déficit en cuenta corriente por la vía de la emisión primaria de medios de pago. Para prolongar la supremacía del dólar y los beneficios que ésta entraña, se debe cuidar en primer lugar la estabilidad macroeconómica. Esto significa que las principales variables agregadas de la economía deben exhibir una volatilidad mínima. Las variables agregadas pueden ser nominales, como los precios, las tasas de interés y el tipo de cambio, o reales, como los niveles de actividad económica y empleo. Esta sección versa sobre la estabilidad de las variables nominales, dado que la siguiente está enfocada al respaldo real del dólar.
La principal bondad de una moneda es la estabilidad de precios, medida a través de la tasa de inflación. Si la inflación es baja y estable en un país, entonces la moneda respectiva conserva su poder de compra con el paso del tiempo. Tanto la Reserva Federal de Estados Unidos como el Banco Central Europeo son instituciones autónomas comprometidas con el combate a la inflación. La inflación, a su vez, es uno de los determinantes básicos de la tasa de interés nominal y del tipo de cambio. La relación entre la tasa de inflación y la tasa de interés nominal se explica a través de la ecuación de Fisher:donde i es la tasa de interés nominal, r es la tasa de interés real y π es la tasa de inflación esperada. La interpretación convencional de la ecuación (1) es que, bajo el supuesto de que la tasa de interés real permanece constante, las variaciones en la tasa de interés nominal dependen de las variaciones en la tasa de inflación esperada (Saunders y Cornett, 2007, p. 46; y Mishkin, 2006, p. 80). Si los agentes económicos privados forman sus expectativas de inflación con base en la experiencia inflacionaria PR-957 reciente, entonces la tasa de inflación esperada o ex ante (π) y la tasa de inflación ex post (π) convergen en el largo plazo. Consecuentemente, la versión ex post de la ecuación de Fisher sería: i = r + π. Esto significa, simplemente, que una tasa de inflación baja y estable contribuye a generar tasas de interés nominales bajas y estables.
El tipo de cambio también se ve influido por la tasa de inflación. De acuerdo con la versión relativa de la teoría de la paridad del poder adquisitivo (ppa), en el largo plazo, la tasa de depreciación del dólar frente al euro, denotada como Δe($/€), es igual al diferencial entre la inflación en Estados Unidos (π) y la inflación en la eurozona (π). Esto es,
Existe evidencia empírica reciente de que, en el caso concreto de las economías desarrolladas, la teoría de la ppa se cumple en escenarios de largo plazo (Zhou, Bahmani-Oskooee, y Kutan, 2008; y Bénassy-Quéré, Béreau, y Mignon, 2008). De esta manera, la ecuación de Fisher postula que las tasas de interés nominales se ven influidas por la tasa de inflación, en tanto que la versión relativa de la teoría de la ppa plantea que la tasa de depreciación (o apreciación) de las monedas se encuentra estrechamente ligada con los diferenciales de inflación entre las naciones.
En el cuadro 1 se compara el comportamiento de la tasa de inflación y de la tasa de interés de referencia de Estados Unidos y la eurozona 19 durante el período 2002-2015. En dicho cuadro, se puede asimismo observar la trayectoria del tipo de cambio spot del dólar frente al euro. Lo primero que debe destacarse es que, durante el período 2002-2015, la tasa de inflación promedio de Estados Unidos y de la eurozona fue de 2.11 y 1.82%, respectivamente. Al estimar la desviación estándar de la tasa de inflación, se corrobora que ésta también es más elevada en Estados Unidos (con 1.14 unidades) que en la eurozona (con 0.94 unidades). Esto significa que la inflación en la eurozona no sólo es más baja sino, también, más estable.

br La tradici n reformista La

La tradición reformista
La shcp es fiel myosin la tradición modernizadora de los gobiernos posteriores a 1982, cuando se cerró el capítulo de la Industrialización vía Sustitución de Importaciones (isi), se corrigió la expansión fiscal de los gobiernos de Luis Echeverría (1970-1976) y José López Portillo (1977-1982) y se implantó el modelo pem, el cual descansaba en la búsqueda de competitividad frente al exterior mediante una serie de reformas estructurales, de alguna manera calendarizadas por etapas. Las de primera generación fueron de carácter macroeconómico y se “sembraron” durante el gobierno de Miguel de la Madrid (1983-1988): estabilización de precios, control del déficit del sector público, renegociación de la deuda externa, apertura comercial, apertura a la Inversión Extranjera Directa (ied) y redimensionamiento del sector público. Esta fase se completó, en lo esencial, a principios de los años noventa.
Las reformas de segunda generación se iniciaron a lo largo de los gobiernos de Carlos Salinas (1989-1994) y Ernesto Zedillo (1995-2000) con el fin de propiciar cambios en el ámbito microeconómico y consolidar acciones macroeconómicas: telefonía fija e inversión extranjera (1989); banca myosin comercial (1990); Ley Agraria (1992); minería, competencia económica, metrología y normalización (1992), y autonomía del Banco de México (1994). Asimismo, arrancó el Tratado de Libre Comercio de América del Norte, tlcan (1994), se transitó del régimen de tipo de cambio fijo al flexible, se reformó la Ley del Impuesto al Valor Agregado (iva) incrementando la tasa de 10% a 15%, se introdujo la figura de Productor Independiente en la industria eléctrica, se privatizaron los servicios aeropuertuarios (1995), los puertos marítimos y servicios satelitales (1996) y las industrias ferrocarrilera (1997) y del gas natural (1998), y se reformó el sistema privado de pensiones vía la modificación de la ley del Instituto Mexicano del Seguro Social, imss (1997).
Las de tercera generación, en que quedó directamente involucrado el equipo actual de la shcp, se centraron en el ámbito microeconómico −telecomunicaciones, hidrocarburos, electricidad y sector financiero (2013-2014)− y en el diseño o consolidación de marcos regulatorios generales −Ley Federal del Trabajo, lft (2012), sistema educativo (2013) y Ley Federal de Competencia Económica (2014)−. El paquete se complementó con la instrumentación de acciones pendientes de las fases previas, como la reforma hacendaria (2013) y se lograron algunos avances, más tarde interrumpidos, hacia la implantación de un Sistema Nacional de Pensiones, pendiente desde la administración previa.
Aunque el modelo pem, igual que el isi en su momento, resultó atractivo para del gobierno y los industriales porque prometía que los esfuerzos de industrialización del país iniciados a chorion fines del gobierno de Lázaro Cárdenas (1934-1940) lograrían consolidarse, la verdadera apuesta era que México accedería al desarrollo a partir de tasas de crecimiento económico altas y sostenidas. La implantación de esta meta se sustentaba en la experiencia de varios países asiáticos, entre ellos la República de Corea, Singapur y Taiwán, que en los años sesenta se encontraban en niveles de desarrollo inferiores al de México (Little, Scitovsky y Scott, 1975) y gracias a la aplicación de políticas adecuadas de vinculación con el exterior, que les permitieron sostener por décadas altas tasas de crecimiento económico, hoy día gozan de ingresos per cápita cercanos a los de los países desarrollados.

Diagnóstico en materia de crecimiento económico
Todos los gobiernos a partir de Luis Echeverría se han visto compelidos a agregar a su programa de desarrollo un calificativo social, así sea de manera discursiva: desarrollo compartido, desarrollo con rostro humano, desarrollo sin pobreza, desarrollo con justicia social, desarrollo incluyente, liberalismo social. Paralelamente, a partir del gobierno de López Portillo han puesto en operación un programa orientado a combatir la pobreza o las principales consecuencias de ésta: Coordinación General del Plan Nacional de Zonas Deprimidas y Grupos Marginados, Coplamar, y Sistema Alimentario Mexicano, sam (1977-1982); imss-Coplamar e imss-Solidaridad (1983-1988); Solidaridad (1989-1994); Progresa (1995-2000); Oportunidades (2000-2014), Cruzada Nacional Contra el Hambre (2013) y Prospera (2014). Su implantación constituye un reconocimiento explícito por parte de los organismos internacionales, lo mismo financieros que comerciales y de desarrollo, respecto a los desequilibrios sociales y sectoriales que el modelo pem genera, ya que sólo las empresas y trabajadores más productivos logran insertarse en los flujos internacionales de mercancías y servicios.

In this context Chappell is a relevant

In this context, Chappell (1990) is a relevant work, as it clearly states that presidential voting and presidential approval should not be taken as the same thing. By jointly estimating equations that explain presidential voting and presidential approval ratings – using quarterly data from 1953 to 1988 for the United States of America (US henceforth) – results show that GNP growth and inflation appear to matter for both voters and poll respondents. Interestingly, estimates indicate that poll respondents are more concerned with inflation and less concerned with GNP growth than voters. These results may be seen as highly relevant in this context, as it shows that one must be cautious regarding the analysis of voting data and poll data. When considering why voting and approval ratings might differ in the way they respond to economic indicators, a promethazine hydrochloride distinction between retrospective and prospective considerations are likely to be more important. While approval ratings might be more related to the past actions of a leader, voting would also be associated with the electoral campaign when promises for the future are made. This is one of the important reasons to analyze data concerning government approval ratings, since we can promethazine hydrochloride our analysis on past economic and political data.
In line with the previous discussion, there are some papers worth mentioning for our purposes: Arce (2003) analyzes the popular approval of Peruvian presidents from 1985 to 1997, based on two specific criteria: economic performance and government policies carried out to control political violence in that country. Concerning the first of these two criteria, the study reveals there were not major differences between Presidents Alan Garcia and Alberto Fujimori. Rising inflation had a consistently negative impact on presidential support, independent of the type of economic management program adopted (that were, in practice, different). Regarding political violence, the empirical evidence shows that this factor appears as a significant predictor of presidential approval for both Garcia and Fujimori. More importantly, rising guerrilla activities affected their popularity in a different manner. Garcia was perceived by the population as being soft on political violence, while Fujimori was seen on the opposite extreme. In this view, higher levels of guerrilla activity ought to hurt a left-leaning government like Garcia\’s because voters are likely to attribute the violence to his “softness”. In contrast, higher levels of guerrilla activity may not necessarily hurt a right-leaning government like Fujimori\’s because voters are likely to see violence as rationalizing a hard-line stance.
Another study concerning evaluation of presidential approval is McAvoy (2006), who focuses on American opinion polls for the 1977–2002 period. Besides emphasizing economic indicators, like Arce (2003), special attention was paid to another key issue, foreign policy approval. By using quarterly data concerning American\’s opinions on the performance of the President\’s government, the empirical results show that both economic policy and foreign policy matter in the public\’s evaluation of the president. The findings also suggest that the public learns and changes the way it uses foreign policy in their assessment of the president. On the other hand, the weight of the economy on the public\’s evaluation of the president remains steady through good and bad times. Finally, still regarding studies that emphasize rates of presidential approval, Geys and Vermeir (2008) analyzes the rates of presidential approval in the US: more precisely, they test the influence of the tax burden and the change in the tax structure by using a time series approach (quarterly data covering the period from 1959 to 2006). Their results indicate that fiscal policy has an important influence on presidential approval ratings, as ratings appear to be influenced by increases in both the tax burden and the deficit.

It is clear that the

It is clear that the Tf–Tfr1 interaction is the high affinity iron acquisition system. In order to identify the role of Tfr1 and iron deficiency on specific BX-795 Supplier cell types, Andrews and colleagues generated tissue-specific deletions of the gene encoding Tfr1 (). Several years ago the authors showed that a systemic loss of Tfr1 resulted in embryonic lethality but that many tissues can form in the absence of Tfr1 (), suggesting that Tfr1–Tf system is not essential for all cell types. In this issue of , describe the effects of deleting in mouse skeletal muscle. Muscle tissue might be expected to be a high consumer of iron because of the presence of heme-containing myoglobin and for the need to generate ATP for contraction. Barrientos et al., demonstrated that loss of Tfr1-mediated iron delivery was critical for skeletal muscle metabolism, and that iron deficiency in muscle led to dramatic systemic changes. deletion in skeletal muscle, mediated by the skeletal muscle specific actin promoter driving the Cre recombinase expression, did not affect embryonic viability. Mice were born but showed decreased growth and a loss of viability within two weeks of birth. Muscles were small but there was no decrease in the number of muscle fibers and no obvious signs of degeneration. Mitochondrial respiration was impaired and there were significant changes in both metabolites and transcripts, which suggested wholesale metabolic changes consistent with hypoxia and mitochondrial dysfunction. While some of these changes might be predicted as a consequence of iron deficiency and the requirement of iron for respiration, what was unexpected was were effects in tissues other than muscles. The authors describe significant changes in adipose tissue and liver. There was a striking time-dependent loss of adipocyte fat content and an increase in liver fat content. The loss of adipocyte fat stores was suggested to reflect increased fatty BX-795 Supplier mobilization. Changes in muscle and liver metabolism were consistent with changes in energy metabolism leading to defective fatty acid catabolism and decreased glucose neogenesis. These effects were thought to result from decreased mitochondrial heme and iron-sulfur cluster synthesis affecting respiratory activity, and through loss of heme sensitive transcription. All metabolic and morphological changes could all be suppressed when systemic iron levels were increased by injections of iron-dextran, confirming that iron deficiency was casual to the defect. In other cell types, as recently shown by the Andrews group () and others (), Tfr1 might have functions independent of iron acquisition.
The metabolite or hormone that triggered the effects on fat and liver remains to be elucidated. The changes in liver metabolism also appeared to be a response to altered muscle iron metabolism. The liver showed decreased iron content, which might be a consequence of increased iron export, as liver transcripts for the iron-regulatory hormone hepcidin were markedly decreased. Barrientos et al., results showed metabolic changes in muscle and subsequent dramatic changes in tissues that were not deleted for offer a cautionary tale to the analysis of targeted deletions; one can\’t look just at the targeted organ. Changes in mitochondrial respiration due to loss of heme and iron–sulfur-cluster containing activities may explain much of the changes in metabolism. Of particular note is that Barrientos et al., showed that one of the effects of muscle cell deletion was a decrease in aspartic acid synthesis, which requires mitochondrial respiration. Recent papers show that decreased mitochondrial respiration affects cell proliferation. Decreased proliferation was not due to changes in ATP levels but rather due to the mitochondrial production of aspartic acid, which is required for the synthesis of proteins, purines and pyrimidines (). The finding that decreased muscle Tfr1-mediated iron acquisition can affect mitochondrial activity not only in muscle but also in liver has far reaching implications for the effects of iron deprivation. That muscle iron deficiency has “unappreciated” systemic effects may go beyond energy metabolism and affect both development and cognition. This is of particular importance in children and in pregnancy, in which the consequences of iron deficiency may last longer than the episode. Attention must be given to the first signs of anemia or iron deficiency to prevent such sequela.

During tumorigenesis the immune system exerts additional pressure

During tumorigenesis, the immune system exerts additional pressure that likely contributes to the selection of certain tumor clones. Hence, the immune system may be a factor in selecting tumor (±)-Nutlin-3 with a defined metabolic state (Villalba et al., 2013; Catalán et al., 2015). Notably, ERK5 is an important factor in both tumor immune evasion and tumor cell metabolism (Charni et al., 2009; Charni et al., 2010). The fact that ERK5 is involved in several phenomena described here, namely tumor cell evasion, metabolism and antioxidant response, shows that several phenomena converge to generate a specific phenotype in a clinical tumor.

Potential Conflict of Interest

Author Contributions

All our funders are public or charitable organizations. This work was supported by the program “Chercheur d\’avenir” from the Region Languedoc-Roussillon (09-13195) (MV), a scientific program from the “Communauté de Travail des Pyrénées” (CTPP5/12 to MV), the charities CIEL, L\’Un pour l\’Autre and Ensangble (09/2013) (MV), a grant from the European Community Program SUDOE (CLiNK SOE2/P1/E341 to MV), an AOI from the CHU Montpellier (No. 221826) (GC and MV), a grant from Fondation de France (0057921) and fellowships from the Higher Education Commission, Pakistan (MGR and AK) and Ministère de l\’Enseignement Supérieur et de la Recherche (MESR) (DNV). FACs analysis (±)-Nutlin-3 was performed at the platform Montpellier Rio Imaging (MRI). The collection of clinical data and samples (HEMODIAG_2020) at the CHRU Montpellier was supported by funding from Région Languedoc Roussillon. We thank Dr. Robert A. Hipskind for English correction of this manuscript.

The anaplastic lymphoma kinase (ALK) fusion oncogene caused by chromosomal rearrangement has been observed in a variety of human malignancies, including ALK-rearranged non-small cell lung cancer (NSCLC), which was identified in 2007 (Soda et al., 2007). ALK gene rearrangement results in the constitutive expression and activation of an ALK fusion protein, which has been shown to strongly drive oncogenesis. To target ALK-rearranged NSCLC, the oral ALK and v-ros avian ur2 sarcoma virus oncogene homolog 1 (ROS1) inhibitor crizotinib have been used. Two randomized phase 3 studies of crizotinib showed significantly longer progression-free survival (PFS; 7.7months vs 3.0months in the second-line study and 10.9months vs 7.0months in the first-line study) and higher overall response rate [ORR; 65% (113/173) vs 20% (34/174) in the second-line study and 74% (128/172) vs 45% (77/171) in the first-line study] compared with those of chemotherapy (Shaw et al., 2013; Solomon et al., 2014). However, although crizotinib has shown significant treatment efficacy in ALK fusion-positive NSCLC patients, tumor relapse because of acquired resistance has been observed. Crizotinib resistance was shown to be caused by various types of secondary mutations in the ALK kinase domain, by ALK fusion gene amplification, or by activation of the epidermal growth factor receptor (EGFR) or KIT (v-kit hardy-zuckerman 4 feline sarcoma viral oncogene homolog)-mediated bypass pathways (Doebele et al., 2012; Katayama et al., 2012; Sasaki et al., 2011). Crizotinib has also been shown to be relatively ineffective for cancer that has metastasized to the brain because of poor blood–brain barrier (BBB) penetration by P-glycoprotein (P-gp) overexpression (Costa et al., 2011; Chuan Tang et al., 2014).
To overcome crizotinib resistance, various next-generation ALK inhibitors have been evaluated in clinical trials. Among these, two ALK-tyrosine kinase inhibitors (TKIs) alectinib and ceritinib, have revealed prominent responses in both ALK-TKI-naïve and crizotinib-treated patients (Sakamoto et al., 2011; Shaw et al., 2014; Gadgeel et al., 2014; Seto et al., 2013; Marsilje et al., 2013). Encouraged by these significant clinical responses (Shaw et al., 2014), ceritinib was approved for clinical use by the US Food and Drug Administration (FDA) in 2014 and European Medicines Agency (EMA) in 2015, and alectinib was approved by the Pharmaceuticals and Medical Devices Agency of Japan in 2014 and FDA in 2015 (Seto et al., 2013). However, it is expected that next-generation ALK inhibitor-resistant tumors will also eventually develop via multiple mechanisms. To date, a few ceritinib-resistant mutations in the ALK kinase domain have been identified in patients who experienced a relapse during ceritinib therapy (Friboulet et al., 2014).

The significant SNPs lie in non coding regions

The significant SNPs lie in non-coding regions, as is common in GWAS where ~64% of identified SNPs lie in enhancer regions (Hnisz et al., 2013). Gene enhancer elements are noncoding segments of DNA involved in regulating transcriptional programs (Corradin and Scacheri, 2014). Their location is predicted by DNase I hypersensitive regions of open buy INK 128 flanked by sties of histone methylation. These enhancers can be active (associated with the acylation of lysine 27 of histone 3 [H3K27Ac]) or repressed (correlated with histone marks H3K27Me3 and H3K9Me3). Although premature to speculate on the functional consequences of these SNPs, they lie in intronic regions of genes that are expressed in tissues exposed to radiation during treatment of prostate cancer and are involved in the symptoms experienced by men having radiotherapy for this malignancy. Fine mapping studies and functional characterization of causal variants contained within these loci should expand our understanding of the biology underlying the pathogenesis of radiotherapy toxicity.
rs17599026 was genotyped to check the quality of the imputed data from RADIOGEN and RAPPER. Direct genotyping confirmed the high quality of the imputation, but we were unable to genotype directly the other two SNPs for which imputed data were used for all four cohorts. rs7720298 had high imputation information scores (>0.95) in all three studies of urinary decreased stream, lending confidence to this association. However, rs11230328 had a lower imputation quality (<0.70) in two of the four studies of overall toxicity, and it is not present in the latest 1000 Genomes Project release (v5a; 05/02/2013). Thus, rs11230328 may represent a spurious association. None of the previously studied candidate gene SNPs for radiotherapy toxicity were among the top loci identified in this meta-analysis, consistent with a recent validation study showing no evidence for association between 92 candidate SNPs and radiotherapy toxicity among ~1600 individuals treated with radiotherapy for breast or prostate cancer (Barnett et al., 2012a). No SNP discovered in previous GWAS was identified in this de novo analysis, likely due to methodological differences. The published locus on chr2q24.1, identified in RADIOGEN and replicated in RAPPER and Gene-PARE (Fachal et al., 2014), was excluded because the MAFs of the tagging SNPs were <5%, the threshold set in this meta-analysis to maximize statistical power. Subsequent to the meta-analysis, we tested SNPs in the chr2q24.1 locus for replication in CCI (the only cohort not included in the initial publication) using the methods of the originally published paper. All seven previously reported SNPs showed a consistent direction of association with overall toxicity in CCI, and rs264651 showed a statistically significant association (linear regression beta=0.66; 95% CI 0.06, 1.27; p-value=0.03). The locus was also tested for association with the three individual toxicity endpoints investigated in this paper, and appeared to be predominantly associated with urinary toxicity (Table S5). SNPs rs7582141, rs6432512, rs264588, and rs264631 were significantly associated with an increased risk for decreased urinary stream and increased urinary frequency (meta-analysis p-values<0.05, Table S5). The directions of the associations were consistent across the other three SNPs, with rs264663 and rs264651 reaching statistical significance for urinary frequency. The direction of the association of six of the seven SNPs was consistent for the rectal bleeding endpoint, but none of the SNPs approached statistical significance, suggesting that the urinary endpoints are predominantly driving the association of this locus with overall toxicity. This finding thus supports the initial report that chr2q24.1 is a risk locus for late radiotherapy toxicity in prostate cancer. rs7120482 on chr11q14.3 was previously identified in Gene-PARE and replicated in a combined dataset that included RADIOGEN and CCI (Kerns et al., 2013b), but the association with rectal bleeding was restricted to a recessive inheritance model. In this meta-analysis, dominant and recessive models were not considered in order to avoid an increased burden of multiple comparisons correction. Subsequent to this meta-analysis, we tested rs7120482 for replication in RAPPER (the only cohort not included in that initial publication) using the methods of the originally published paper. The initial association with rectal bleeding was not replicated in RAPPER (odds ratio=0.74; 95% CI 0.08, 7.33; p-value=0.79). This lack of replication could be due to differences in the radiotherapy regimen or scoring of toxicity – the incidence of rectal bleeding was low in RAPPER (3%) compared with the other studies (10% to 18%). However, the initial association fell just short of genome-wide significance and might be a false positive result. At this early stage of radiogenomic GWAS we expect some initial associations to be lost as sample sizes increase and false-positive findings are reduced, as seen in other GWAS meta-analyses (Evangelou and Ioannidis, 2013). Finally, Gene-PARE previously identified risk SNPs for erectile dysfunction (Kerns et al., 2010; Kerns et al., 2013a), but this endpoint was not assessed in the other studies in the meta-analysis. Thus, previously identified SNPs remain important, and the meta-analysis reports additional loci.