ostreatus To develop a system for in vivo analysis of poxa1b pro

ostreatus. To develop a system for in vivo analysis of poxa1b promoter and its metal regulation, the gene-encoding GFP was adopted as reporter gene putting its expression under the control of 1400-bp-long poxa1b promoter region. GFP of the jellyfish Aequorea victorea emits fluorescence as a result of its intrinsic chromophore structure, not requiring any substrate or cofactor (Chalfie et al., 1994), and it represents a versatile reporter gene (Cubitt et al., 1995). The vector pEGFPea1b for in vivo analysis of P. ostreatus laccase promoters was constructed using the gene coding for

enhanced GFP (EGFP). A P. ostreatus poxa1b promoter region of 1336 bp was used as cis-regulatory element to drive expression of EGFP. An intron/exon fragment containing an intron/exon sequence of the poxc selleck compound library gene was included between the poxa1b promoter and the egfp gene, considering previous results showing that efficient GFP expression in Agaricus bisporus and Coprinus cinereus (Burns et al., 2005) and Phanerochaete chrysosporium (Ma et al., 2001) requires introns. A homologous selection marker, the mutant gene cassette CbxR, encoding a modified iron–sulfur protein Ip subunit of succinate dehydrogenase with an aminoacid substitution (His239 to Leu) and conferring

resistance to systemic fungicide carboxin (Honda et al., 2000), was adopted. Cotransformation with pTM1 vector conferring carboxin resistance and pEGFPea1b vector containing egfp gene under the control of poxa1b promoter region was carried out, by adopting Adriamycin ic50 an adapted version of transformation protocol reported by Salame et al. (2010). Moreover, an unique vector containing both the mutant gene cassette CbxR and the reporter cassette poxa1b promoter-egfp Protirelin gene was constructed and adopted for transformation. Transformants were firstly screened for carboxin resistance. The carboxin-resistant colonies were subjected to at least four rounds

of selection by transferring on fresh selection medium. Around 50 carboxin-resistant transformants were obtained per μg of pTM1 DNA per 107 viable protoplasts in a transformation with pTM1 and pEGFPea1b, and five carboxin-resistant transformants were obtained per μg of pEGFPCBX DNA per 107 viable protoplasts in a transformation with this vector. Hence, cotransformation with vectors containing gene cassette CbxR and the reporter cassette poxa1b promoter-egfp gene allowed a 10-fold higher transformation efficiency than transformation with an unique vector containing both cassettes. This could be ascribed to the larger size of the latter construct. The carboxin-resistant transformants were further analyzed for checking the presence of egfp and fluorescence emission. Carboxin-resistant transformants were analyzed by PCR to verify the presence of the transforming DNA.

25-fold per subsequent year The prevalence of non-B subtypes in

25-fold per subsequent year. The prevalence of non-B subtypes in Italy was first estimated in a 2001 study which reported an overall prevalence of 5.4% among drug-naïve patients, with an increasing trend over time [7]. Two later studies reported higher prevalences of 12.6 and 10.7% in regions Selleckchem STA-9090 with

low/medium and high incidences of infection, respectively [25,26]. Both these figures, although showing an increase in non-B prevalence over time, are lower than those reported in this work, as well as in surveillance studies carried out in other European countries such as France, Belgium and the United Kingdom [8,9,11]. According to several studies, the spread of non-B subtypes is highly dependent upon several

variables that define the demographics of local HIV-1 epidemics and their evolution over time. The proportions of patients of non-Caucasian ethnicity and those infected via the heterosexual route increased in our case file throughout the study period. However, we also detected a higher prevalence of non-B variants in European individuals after 1992, with a 5-fold increase being found in the proportion of patients with non-B variants compared with the earlier period. As expected, the regression analysis indicated a strong association between the African ethnicity and the carriage of non-B strains. ERK inhibitor However, Meloxicam 50% of individuals infected with strains other than B were Caucasian, suggesting that these strains have been onward-transmitted to Europeans at a considerable rate. Overall, an increase in the prevalence of non-B strains was seen in all risk categories; however, the most relevant increase was found in heterosexuals. The multivariable analysis performed on the patient subset with CD showed that the heterosexual route of infection was a strong independent predictor of HIV-1 infection with non-B clades, a 9.5-fold higher risk of carriage of non-B infection being

found for heterosexuals. Probably because of the local characteristics of the HIV-1 epidemic, such as the high proportion of women among IDUs, the male to female ratio was comparable between the period before 1993 and the period from 1993 onwards (2.25 vs. 2.32, respectively), and female gender was not an independent predictor of non-B infection. Nevertheless, women with non-B variants represented a sizeable proportion (almost one-third) of the total number of women diagnosed after 1992. Finally, the evaluation of time of HIV-1 diagnosis clearly indicated that the risk of acquiring non-B infection was 4-fold higher for those diagnosed after 1993 as compared with previous years. High heterogeneity in group M non-B clades was detected in our study, indicating that the sources of non-B infection were dispersed world-wide.

3 We summarize and review current knowledge on life-threatening j

3 We summarize and review current knowledge on life-threatening jellyfish stings in Thailand, hoping this report will provide a stimulus for improved awareness and management of jellyfish problems throughout Southeast Asia. Two kinds of potentially deadly jellyfish are confirmed in Thai waters: chirodropid box jellyfish and Irukandji box jellyfish (L. Gershwin, unpublished

data). Hundreds of other species of jellyfish are also present but are not considered as life threatening. Chirodropids are large box-shaped jellyfish www.selleckchem.com/products/lee011.html (ie, “box jellyfish”) with multiple tentacles arising from each of the four lower corners of the bell. Irukandji are easily distinguished from chirodropids, as their box-shaped body has just a single tentacle at each lower corner. Chironex kill by massive envenomation, causing respiratory arrest or cardiac arrest in systole in as little as 2 to 3 min. Their stings have caused multiple human fatalities throughout the Indo-Pacific, including the Maldives,

southern India, Myanmar, the Malaysian archipelago (east and west coasts), Indonesia, Brunei, Sarawak, Sabah, the Philippines and Solomon Islands, Okinawa (Japan), and Australia (Nakorn, Smad phosphorylation personal communication).3-8 At least two confirmed Irukandji deaths have occurred in Australia, probably more, given that the sting leaves little or no mark, and later symptoms resemble acute myocardial infarction (AMI), cerebrovascular accident, or even drowning.9-11 Irukandji syndrome has also been confirmed from Hawaii, Florida, the Caribbean, North Wales (UK), New Guinea, and throughout the tropical Pacific.5,6,9 Chirodropids appear mainly in the summer months in the

northern and southern hemispheres, usually during the local rainy or monsoonal season, and most commonly around sandy beaches near mangrove areas. Their season is longest at the equator, where it can last all year, and reduces moving toward both Tropics. Irukandji are also commonest in the warmer months, although seasonal patterns of some different species9 in Australia have been recorded all months of the year and are probably similar elsewhere.12 Sting case histories were gathered from a variety of sources: PubMed searching keywords “Thailand” and “jellyfish” C1GALT1 provided four relevant publications; most case histories were obtained through Thai physicians, Divers Alert Network reports, witnesses, media, and e-mail contacts. These reports are certainly a significant underestimation of the true occurrence of fatal or severe stings in Thailand. Diagnoses of “box jellyfish sting” and “Irukandji syndrome” were made by standard acceptance. Chirodropids—causing sudden severe skin pain, obvious severe whip-like skin marks (often on the legs from shallow water), rapid reduction of consciousness, and life-threatening breathing and/or cardiac problems.

, 2007) Currently used surfactants are often petroleum derived,

, 2007). Currently used surfactants are often petroleum derived, but production of these compounds from renewable substrates is now of considerable interest. Sophorolipids, which consist of the sugar sophorose linked to a long-chain hydroxy fatty acid, are among candidate compounds that can be produced from renewable sources. Interest in sophorolipids is not limited to selleck production of surfactants. The unique chemical structure of sophorolipids can serve as the basis for synthesizing certain hydroxy fatty acids and other compounds (Van Bogaert et al., 2007). Perhaps of greater interest are reports that these glycolipids have antimicrobial activity against certain yeasts (Ito et al., 1980), plant pathogenic fungi (Yoo et

al., 2005) and bacteria (Mager et al.,

1987; Lang et al., 1989). Furthermore, Shah et al. (2005) showed inhibition of the HIV virus by sophorolipids, and Chen et al. (2006) provided evidence that the compounds have anticancer activity. Sophorolipids Selleckchem Enzalutamide are synthesized by a phylogenetically diverse group of yeasts. The earliest report appears to be that of Gorin et al. (1961), who demonstrated sophorolipid biosynthesis by the anamorphic ascomycetous yeast Candida apicola, which was initially identified as Candida magnoliae. Later, Spencer et al. (1970) showed sophorolipid production by Candida bombicola, and Konoshi et al. (2008) reported Candida batistae to also form sophorolipids. The preceding Atorvastatin three Candida sp. are closely related, but sophorolipid biosynthesis was also demonstrated for the less closely related Wickerhamiella domercqiae (Chen et al., 2006) as well as for the basidiomycetous yeast Rhodotorula bogoriensis (Tulloch et al., 1968). Phylogenetic analysis of sequences for the D1/D2 domains of the nuclear large subunit (LSU) rRNA gene has shown that C. apicola and C. bombicola are members of a clade that is well separated from other ascomycetous

yeasts (Kurtzman & Robnett, 1998). Candida bombicola is the first member of the clade for which ascospore formation was discovered and the species was reassigned to the teleomorphic genus Starmerella (Rosa & Lachance, 1998). With the application of sequence analysis to yeast identification, the group of yeasts related to Starmerella bombicola, now termed the Starmerella clade, has increased markedly in the past decade to over 40 species. Many of these species have not been described as yet but are presently recognized from their gene sequences, which have been deposited in GenBank. Candida apicola, C. batistae and S. bombicola are the only members of the Starmerella clade that have been reported to produce sophorolipids. In the present work, we examined additional species of the Starmerella clade for production of sophorolipids using a matrix-assisted laser desorption/ionisation-time of flight (MALDI-TOF) MS-based screen similar to that used previously to identify bacterial biosurfactants, rhamnolipids, surfactins and iturins (Price et al.

, 2009), and with subjective ratings of appetite during the prese

, 2009), and with subjective ratings of appetite during the presentation of food-related stimuli in healthy young individuals (Porubská et al., 2006). In contrast to these studies, we used the questionnaire of PFS which was designed to examine directly individual differences in the appetitive motives Metformin chemical structure in the face of incentive of food (food available, present or tasted) in daily life. In our recent report, significant correlations were observed in

the Fasting condition between the intensities of the MEG responses and the aggregated scores and the subscale scores of factor-1 (food available) and those of factor-2 (food present) of PFS (Yoshikawa et al., 2013). The correlations were replicated in the present study. Combined with the results, while the intensities of magnetic responses of insular cortex in the Fasting condition were correlated with self-awareness of appetitive motives when food is available or present before tasting, those in the ‘Hara-Hachibu’ condition were more correlated with the self-awareness of motives after tasting. The findings are plausible in the view of one-to-one correspondence between click here dietary condition (Fasting or ‘Hara-Hachibu’) and the setting of PFS (before or after tasted). In other words, the insular cortex in some individuals might tend to be more reactive to information about food cues before eating, and the brain area in others might

be susceptible to the visual stimuli of food even after they have eaten (in the ‘Hara-Hachibu’ condition). Such tendencies of acute activity in insular cortex might lead to self-awareness of their appetitive motives in daily dietary life. It is thought that the sensitivity of the insular cortex to visual food stimuli might be genetically inherited or acquired (learned)

later in life. Previous animal studies showed that the gustatory insular cortex is involved in encoding changes in the incentive value assigned to instrumental outcomes on the basis of prevailing PTK6 motivational conditions (Balleine and Dickinson, 2000), supporting the latter acquired (conditioned) theory. Accordingly, conditioning is one of the possible mechanisms of the observed association of insular cortex activity with subscale scores of factor-3 of PFS in the ‘Hara-Hachibu’ condition as well as the factors-1 and 2 of PFS in the Fasting condition. It is interesting to speculate as to whether and how the conditioning-related sensitivity of the insular cortex to visual food stimuli can be altered by life-style changes such as overfeeding (Cornier et al., 2009) and exercise (Cornier et al., 2012 and Evero et al., 2012). Future investigation will be needed to elucidate the mechanism whereby the conditioned instantaneous responses of insular cortex can be altered. The present study has several potential limitations. Firstly, we examined the brain activity in normal-weight young males without apparent eating disorders.

The 10 selected questions were: 1 When should we introduce corti

The 10 selected questions were: 1. When should we introduce corticosteroids, and for how long?

After identifying the 10 questions, a specialist company was contacted to perform a literature search. Based on the literature search, a group of five bibliographic fellows from different countries, analysed the results of the search, and produced a report for each question including draft answers and supporting information with references, based on the evidence levels (Table 1) and grades of recommendation (Table 2) from the Oxford Centre for Evidence.8 The report developed signaling pathway by the bibliographic fellows was reviewed and each of the draft answers was consolidated and approved by a group of project mentors, members of the International Steering Committee. A National Steering Committee (NSC) was created including eight experts. Their main objective was to help elaborate the agenda, selleckchem identify additional delegates with good anti-TNF therapy experience, develop/approve materials, and moderate the National

Meeting with the end purpose of contributing to the development of its outputs. During the National Meeting, the 21 participants split into five small groups (Group 1 with five members and the remaining ones with four each) to review two answered questions each. The small groups were chaired by two of the members of the NSC who presented the proposed draft answers and moderated the discussion until the group had agreed on revised wording for the answers to their selected questions. All answers were classified according

to the Oxford levels of evidence (Table 1) and graded according to the Oxford grades of evidence (Table 2).8 After reaching an agreement, all participants reconvened to present their selected answers to the entire group, followed by an overall group vote to reach a consensus for each answer. If the voting did not achieve an agreement after the initial round, participants discussed the response further and proposed a new answer, one on which an agreement could be reached. If there was no consensus after two votes, there was Lepirudin no further discussion. Participants voted according to a scale from 1 (strong disagreement) to 9 (strong agreement). Consensus was defined as a score of 7–9 by ≥75% of the participants. Table 3 shows the mean scores of agreement and the percentage of participants who agreed with the answer to each question. Question 1. When should we introduce corticosteroids and for how long? Draft answer modified by National Meeting Working Group (1) When considered as a treatment option, conventional corticosteroids should be introduced in moderate to severely active Crohn’s disease of any localization (level of evidence: 1a; grade of recommendation: A). Question 2.

DArT is a hybridization-based molecular marker system It has bee

DArT is a hybridization-based molecular marker system. It has been used in barley [90], wheat [91], rye [92] and triticale [93].

It is particularly noted for its high-throughput, quickness, high reproducibility and low cost [94]. Hundreds to thousands of polymorphisms can be detected Selleckchem SGI-1776 very quickly [95]. The use of DArT markers to perform whole-genome mapping in some Brazilian wheat cultivars validated the citrate efflux mechanism for Al tolerance [59]. DArT markers combined with SSR and STS markers also validated the candidate Al tolerance gene HvMATE on chromosome 4H in barley [89]. Genetic mapping refers to the mapping of gene/loci to specific chromosome locations using linked genetic markers [96]. Some cereal crops, such as wheat [97], barley, sorghum (Sorghum bicolor L.) and oat were reported to have simple genetic mechanisms of Al tolerance, whereas rice and maize (Zea mays L.) have more complicated inheritance with numerous genes/loci involved. Generally, a single dominant gene is responsible for Al tolerance in wheat [98]; however,

there are exceptions in some cultivars [99]. Using different populations, genes/loci for Al tolerance were mapped on different wheat chromosomes. Single loci for Al tolerance Y-27632 price were identified on chromosomes 4DL, 4D, 4BL or 3BL, which had phenotypic contributions as high as 85% (locus on 4DL), 50% (4D), 50% (4BL) and 49% (3BL) [59], [81], [86] and [100]. In addition, genes/loci on chromosomes 6AL, 7AS, 2DL, 5AS, 3DL Resveratrol and 7D had roles in Al tolerance in wheat [101] and [102]. Complex inheritance of Al tolerance was found in wheat. Zhou et al. [103] identified a secondary QTL for Al resistance on chromosome 3BL in Atlas 66, which was effective only when the epistatic gene on 4DL was absent. Cai et al. [104] mapped three QTL responsible for Al tolerance on wheat chromosomes 4DL, 3BL and 2A, which collectively explained 80% of the phenotypic variation. In sorghum, Al tolerance was simply inherited [105]. Magalhaes et al. [106] reported a major locus AltSB

on chromosome 3 for Al tolerance using comparative mapping. In rye, Al tolerance was reported to be controlled by several loci; at least four independent loci, Alt1 on 6RS [107], Alt2 on 3RS [101], Alt3 on 4RL [83] and Alt4 on 7RS [108], were validated by QTL analysis. The genes on 3R, 6RS and 4R were validated using wheat addition and substitution lines with rye chromosomes [101]. Gallego and Benito [109] reported that Al tolerance in rye was controlled by dominant loci Alt1 and Alt3; the latter on chromosome 4RL was validated using recombinant inbred lines [83]. Alt4 on chromosome 7RS was identified in three different F2 populations [108]. In Arabidopsis, Al tolerance seems to be multi-genetically controlled.

For all tank configurations the flushing efficiencies

of

For all tank configurations the flushing efficiencies

of ‘far open’ and ‘both open’ were similar and higher than that of the ‘near open’ case. For the ‘far open’ and ‘both open’ cases, the flushing efficiency increased linearly Selleckchem CP868596 with time up until T≃0.6T≃0.6, because the water exiting consisted entirely of water that was initially in the tank. When T≳0.6T≳0.6, the water exiting the tank consisted of an increasing fraction of the water that was being used for flushing the tank. In total, the flushing efficiency at T  =3 of these two cases was lower than the pure displacement, but higher than estimates based on perfect mixing in the whole tank. For the ‘near open’ case, the transition from displacement flushing to mixing occurred earlier at T≃0.5T≃0.5, because the incoming water bypassed a large part of the tank and was not able to exchange the initial water efficiently. Table 2 summarises the flushing efficiency at T  =3 for each case. Generally, the flushing efficiency at T  =3 obtained from the experiments was slightly lower than predicted, except for the ‘near open’ case in the 3×3 tank. In these experiments, the effective Re   decreased in the peripheral compartments leading to lower increase

rates of flushed fraction and higher residence time. Since the total flushing efficiency is an integrated measure over the whole tank, the impact of the peripheral compartments is not significant and this is why the agreement between the theory and the experiments selleck chemicals is generally good. The discrepancy between the model predictions and the experimental measurements for C¯|T=3 is within 1.1%, lower than the limit of experimental errors ~5%. Therefore,

the model is able to understand how the flushing efficiency depends on the outlet arrangements and tank geometries. In this paper, we have examined theoretically and experimentally the flushing of water from a multi-compartment ballast tank. The model is based on perfect mixing within compartments and advection between Thymidylate synthase compartments. To test the model predictions, a series of detailed experiments on tanks with 2×2 and 3×3 compartment configurations were undertaken. When the lightening holes between compartments are identical, the model has no adjustable free parameters, and the agreement between the measurements of the flushed fraction of water in each compartment and predictions is quite good. When the holes between compartments of a tank are different in size, an empirical closure is required to estimate pressure drop coefficients. The flushing from a tank with more complex geometry, typical of a ballast tank, was also analysed. The agreement between predictions and measurements for the flushing efficiency is good. The increased complexity means that the flow through the edge compartments is reduced and in the laboratory study, probably to the extent that the flow within these regions was not turbulent.

WAS is a primary immunodeficiency Many patients with WAS present

WAS is a primary immunodeficiency. Many patients with WAS present with UC-like noninfectious colitis during early infancy.80 The syndrome is caused

by the absence or abnormal expression of the cytoskeletal regulator WASP and is associated with defects in most immune subsets (effector and regulatory T cells, natural killer [NK] T cells, B cells, dendritic cells, macrophages, selleck inhibitor NK cells, and neutrophils).91 In addition to features of UC, patients develop many other autoimmune complications. Allogeneic bone marrow transplantation is the standard of care for those patients.80 Patients who are not candidates for bone marrow transplantation have been successfully treated with experimental gene therapy approaches.92 and 93 Patients with atypical SCID defects have residual B- and T-cell development and oligoclonal T-cell expansion.94 VEOIBD is commonly observed in patients with atypical SCID due to hypomorphic defects in multiple genes such as DCLRE1C, ZAP70, RAG2, IL2RG, LIG4, ADA, and CD3G. 81, 82 and 95 This list of genes is likely not complete, and it

seems reasonable to assume that most genetic defects that cause T-cell atypical SCID also cause IBD. A subset of patients with SCID LBH589 purchase present with severe eczematous rash (Omenn syndrome).81 It is not clear whether residual lymphocyte function in patients with hypomorphic TTC7A mutations is a precondition for IBD or contributes to VEOIBD. 38 Intestinal and skin lesions also develop in patients

with SCID due to graft-versus-host disease in response to maternal cells. 96 Hoyeraal–Hreidarsson syndrome is a severe form of dyskeratosis congenita characterized by dysplastic nails, lacy reticular skin pigmentation, and oral leukoplakia. It is a multiorgan disorder. Patients with mutations in RTEL1 97 and 98 or DKC1 99, 100 and 101 C-X-C chemokine receptor type 7 (CXCR-7) can develop SCID and intestinal inflammation. Loss-of-function defects in IL-10 and its receptor (encoded by IL10RA and IL10RB) 102, 103, 104, 105 and 106 cause VEOIBD with perianal disease and folliculitis within the first months of life. All patients with loss-of-function mutations that prevent IL-10 signaling develop IBD-like immunopathology, indicating that these defects are a monogenic form of IBD with 100% penetrance. 106 and 107 The anti-inflammatory cytokine IL-10 is secreted by natural and induced regulatory T cells (in particular, intestinal CD4+FOXP3+ and Tr1 cells), macrophages, and B cells. Many intestinal and extraintestinal cell types express the IL-10 receptor and respond to IL-10. Defects in IL-10 receptor signaling affect the differentiation of macrophage M1/M2, shifting them toward an inflammatory phenotype.

Orlandini for animal care, Henrique B Biehl and Carlos E L San

Orlandini for animal care, Henrique B. Biehl and Carlos E. L. Santos for their assistance with confocal microscopy (Centro de Microscopia Eletrônica da UFRGS). Technical assistance

was provided by Silvia Barbosa and Antônio Severino. We also thank Ana Paula Horn and Lauren Valentim for their helpful information in immunofluorescence. This study was supported by grants from CNPq and CAPES. There was no conflict of interests. “
“For the growing number of people who have the risk of, or experienced cerebral infarction or TIA (Weimar et al., 2010 and Hata et al., 2005), development of a novel compound to protect neurons from selleck focal ischemia, or even to promote cerebral repair, is urgently required. In the incretin family, glucagon-like peptide-1 (GLP-1), or insulinotropic learn more secreted from L cells in the gastrointestinal tract as a response to food ingestion (Cefalu, 2010 and Rizzo et al., 2009), acts as a trophic factor for β cells in the islets by enhancing insulin biosynthesis/release and their proliferation ( Turton et al., 1996). In addition to the β cell-trophic/insulinotropic

effect, GLP-1 exerts a neurotrophic effect in the brain ( McClean et al., 2010 and Perry et al., 2002). Indeed, GLP-1 can enter the brain; the GLP-1 receptors (GLP-1R) is expressed widely in the central nervous system ( During et al., 2003 and Turton et al., 1996); and the activation of GLP-1R was found to improve cognitive performance ( Li et al., 2010a and During et al., 2003). However, once secreted PAK5 into the blood, GLP-1 is rapidly degraded and inactivated following release

of the intrinsic antagonizing enzyme, dipeptidylpeptidase-4 (DPP-4). Exendin-4 (Ex-4), a long-acting analog of GLP-1 (a GLP-R agonist), developed for intravenous treatment of type II diabetes mellitus (DM-2), demonstrated a neuroprotective property in vivo after cerebro-ventricular administration (Li et al., 2009). Ex-4 also exerted a neurotrophic property in vitro (Li et al., 2010c). Moreover, in a transgenic mouse model of Alzheimer’s disease (AD) combined with streptozocin-induced DM-2, a continuous subcutaneous injection of Ex-4 reduced the levels of amyloid-β (Aβ) protein in the brain ( Li et al., 2010b). Alogliptin benzoate (AGL), a potent and highly selective inhibitor of DPP-4, developed for once-daily oral treatment of DM-2, demonstrated a lower incidence of unfavorable side effects such as hypoglycemia and hyperphagia, compared to previous drugs (Moritoh et al., 2008 and Feng et al., 2007). Although treatment with AGL for a prolonged period in DM-2 patients is expected to protect β cells and prevent atherosclerotic vascular damage, it is unknown whether AGL, independent of its insulinotropic properties, protects neurons against lethal ischemia.