Instructions and practice trials were repeated until the particip

Instructions and practice trials were repeated until the participant and the experimenter were confident the task requirements selleck screening library were understood. Trials were excluded when the saccade was masked by a blink; when no saccade was made; when saccades were made at latencies shorter than 80 ms (i.e. anticipations), or longer than 700 ms; or when saccades had a primary gain of less than 0.3 or more than 1.3. The proportion of excluded trials was similar in the control and the PD groups (both 20%). Trials with saccades initiated at latencies longer than 80 ms, but with directional errors (i.e. the primary saccade was not directed at

the cued target location), were analysed separately. The proportion of correct discriminations in the saccade tasks ‘with discrimination’ was calculated from

the total number of valid trials without directional errors. Effects of the discrimination task and the symbol-changes on saccade latency and gain were analysed with multi-level models. These have the advantage that all observations contribute GDC-0199 in vitro to the model, and the data are not reduced to mean values per condition for each participant, as occurs in traditional anova. The function lme from the R package nlme (Pinheiro et al., 2009) was used to fit the models. Latency and gain values of voluntary saccades were analysed with a linear multi-level model. Proportions of errors Succinyl-CoA and discrimination judgments were compared with multi-level binomial models. Associations between variables were assessed with Pearson’s product-moment correlations. In the text, predicted group means are shown followed by 95%

CI in parentheses. The saccade task without discrimination was performed only in the first session. The saccade task with discrimination was performed in both the first and the second session. There was no significant practice effect and the mean latencies and gain in the discrimination trials were similar in the two sessions in both groups, so the results from the two sessions were pooled (see Table 2). Saccades were performed in trials without peripheral symbol-changes (in the No-change trials) and in trials with peripheral symbol-changes (in the Target, Distractor and Target/Distractor trials). Within each group, the mean latency and gain values in the three trial types with symbol-changes were similar (see Table 3). Therefore, the results from these three trial types were pooled for comparison with the No-change trials: the model included Group (Control or PD), Trial type (trials with or without peripheral symbol-change) and Task (with or without discrimination task) as predictors. The factor Trial type was nested inside the factor Task, which was nested within Subject. Due to the collapsing of the data across SOAs there were more trials with symbol-changes than trials without symbol-changes.

’ (pharmacist 12) ‘It depends on who gets paid’ (pharmacist 18)

’ (pharmacist 12). ‘It depends on who gets paid.’ (pharmacist 18). GPs and pharmacists were asked about perceived barriers to collaboration.

Some GPs didn’t identify any barriers, others listed the expected issues; that is, time and poor communication. Several GPs and pharmacists mentioned payment as a potential issue. Pharmacists identified many more barriers which included time and poor communication but also lack of communication, GP attitudes, inaccessibility, lack of familiarity and motivation to interact. For example ‘doctors are a bit insular, they tend to socialise selleck with each other and that actually carries over to the workplace, that kind of barrier, an invisible barrier . . .’ (pharmacist 1). ‘You can’t tell a doctor anything, he can’t learn from anybody he’s supposed to know it all . . .’ (pharmacist 7). ‘For some doctors, they look down on the pharmacist, they tell you what to do . . . they don’t treat you equally. . . .’ (pharmacist 13). Pharmacists also identified that GPs might feel threatened by pharmacist involvement or that there might be an element of territorialism involved. For example ‘I went on a conference. . . . It

got GPs and pharmacists together, you can see they are not very comfortable being together and in terms of providing health care for the patients, they think we are actually stealing their customers.’ (pharmacist 5). For example ‘. . . the GPs might feel that they’re Carnitine dehydrogenase a little bit under attack because they haven’t put their patients on asthma plans, stuff like that.’ (pharmacist 18). GPs

negated this, describing it as their role or responsibility selleck chemical in patient care. Pharmacists recognised this as well. For example ‘. . . the doctor should lead the team, that’s got nothing to do with territorialism, it’s . . .  accept[ing] responsibility . . .’ (GP 2). ‘. . . doctors still see themselves as the number one provider.’ (pharmacist 10). ‘For some doctors, they look down on the pharmacist, they tell you what to do . . . they don’t treat you equally.’ (pharmacist 13). Low morale of the GP was reported by some GPs and pharmacists and was clearly identified as a potential barrier to teamwork/improved relationships. Universally, the patient was also perceived to be a barrier to a team approach. For example ‘. . . some customers (patients), when you advise them something they never return to the GP or they go to the GP and they might have a different opinion . . . and that’s the problem. . . .’ (pharmacist 5), ‘The patient, if they think its too much trouble [to follow your advice] . . . if you talk to the patient they’ll say “I don’t have time to go see the doctor” that’s probably the main problem because they don’t see asthma as one of the biggest health problems, even though they’re using their puffer four or five times a day . . .’ (pharmacist 12).

1 mL of rabies vaccine over both deltoids and thighs are an effec

1 mL of rabies vaccine over both deltoids and thighs are an effective and convenient 1-day alternative.[20, 22] Even with a history of PrEP, the importance of immediate wound care and booster vaccination must be stressed. Following a PrEP schedule requires planning and time. Abbreviated PrEP schemes are now undergoing study.[23] Our report has limitations inherent of a retrospective study at one center in one country with high awareness of the rabies threat. However, it represented the overview of a practice in realistic conditions of a travel clinic in canine-rabies region. In conclusion, this study

has shown the size of the risk of rabies to Pembrolizumab travelers and what travel clinics are facing in Southeast Asia. Education of travelers before LEE011 purchase they leave is the effective method to reduce the risk. We are grateful to Miss Nartanong Khumniphat for her secretarial support and Dr Lowell Skar for reviewing the manuscript.

The authors declare no conflict of interest in this study. “
“We congratulate Gautret and Parola on their comments[1] in response to our review of human rabies cases in travelers.[2] We could not agree more. It is indeed crucial for everybody at risk of exposure to rabies to be made aware of that risk. This refers not only to people living in endemic areas but also to travelers visiting endemic areas. Everybody needs to be informed of this specific risk, which can only be minimized by avoiding contact with animals, taking the appropriate measures without delay when exposed, and considering the risks and benefits of pre-exposure prophylactic vaccination. As suggested by the Global Alliance for Rabies Control,[3] dealing with rabies should always be a multi-disciplinary, intersectoral endeavor, looking beyond the rim of the teacup. The fight against rabies can pheromone only be successful if medical, veterinarian, and public health experts work closely together, including those specialized in travel medicine. “
“We thank our colleagues for their interest in our paper, and are pleased that our contribution is leading

to debate in the journal about best practice approaches to intradermal (ID) rabies vaccination. It was not our intention to demonstrate that our suggested TRID2 regime was the only or definitive ID vaccine schedule possible—we state in our paper that our study was based on a case series in a busy travel medicine clinic, rather than a funded research trial comparing different approaches. As discussed in our paper, the schedule used in TRID2 was chosen for a number of reasons. We did consider giving single ID doses at 0, 3, and 7 days, but this schedule would require a total of four visits for the vaccines and post-vaccination serology, and would be more inconvenient and costly for travelers than the TRID2 schedule. Also, the current ID rabies vaccination schedule recommended by the NHMRC in Australia is single ID doses at 0, 7, and 28 days.

J Cancer Res Clin Oncol 2012; 138: 425–430 127 González-Molleda

J Cancer Res Clin Oncol 2012; 138: 425–430. 127 González-Molleda L, Wang Y, Yuan Y. Potent antiviral activity of topoisomerase I and Quizartinib II inhibitors against Kaposi’s sarcoma-associated herpesvirus. Antimicrob Agents Chemother 2012; 56: 893–902.

128 Davies BR, Logie A, McKay JS et al. AZD6244 (ARRY-142886), a potent inhibitor of mitogen-activated protein kinase/extracellular signal-regulated kinase kinase 1/2 kinases: mechanism of action in vivo, pharmacokinetic/pharmacodynamic relationship, and potential for combination in preclinical models. Mol Cancer Ther 2007; 6: 2209–2219. People living with HIV have an increased risk of developing non-Hodgkin lymphoma (NHL) [1–4]. The two commonest subtypes are diffuse large B-cell lymphoma (DLBCL) and Burkitt lymphoma/leukaemia Sotrastaurin concentration (BL), which are considered AIDS-defining illnesses (ADI). NHL is the second most common tumour in individuals with HIV and although studies show a decline in incidence since the introduction of HAART [5–8], AIDS-related lymphomas (ARLs)

have increased as a percentage of first ADI [9,10]. The development of ARL has been shown to be related to older age, low CD4 cell count and no prior treatment with HAART [11]. Patients tend to present with advanced clinical stage, B symptoms and extranodal involvement, including bone marrow. Before the introduction of HAART, the outlook for patients with ARL was poor, with the median survival for patients treated with chemotherapy being around 2–13 months. Median survival in the post-HAART era is beginning to approach that observed in the HIV-negative population and depends critically on histological subtype and stage of disease

[12–20]. The diagnosis of ARL should be based on a tissue biopsy rather than a cytological sample. In addition to the routine investigations advised as part of HIV clinical care, all patients require staging with clinical evaluation, blood tests, computerized tomography (CT) scanning and bone Sclareol marrow aspiration and trephine (Table 4.1). 18fluoro-2-deoxy-D-glucose positron emission tomography (18F-FDG PET) scanning at diagnosis improves the staging accuracy and the Imaging Subcommittee of the International Harmonisation Project in Lymphoma has produced guidelines strongly recommending a baseline pretreatment 18F-FDG PET scan [21]. Cerebrospinal fluid (CSF) examination is recommended if there are clinical signs of central nervous system (CNS) disease, or paranasal sinus, breast, epidural or testicular involvement. Cytological assessment by cytospin and flow cytometry is recommended [22]. Indications for intrathecal prophylaxis will be outlined in BCSH guidelines and should be administered at time of first CSF examination in these patients.

J Cancer Res Clin Oncol 2012; 138: 425–430 127 González-Molleda

J Cancer Res Clin Oncol 2012; 138: 425–430. 127 González-Molleda L, Wang Y, Yuan Y. Potent antiviral activity of topoisomerase I and Pexidartinib purchase II inhibitors against Kaposi’s sarcoma-associated herpesvirus. Antimicrob Agents Chemother 2012; 56: 893–902.

128 Davies BR, Logie A, McKay JS et al. AZD6244 (ARRY-142886), a potent inhibitor of mitogen-activated protein kinase/extracellular signal-regulated kinase kinase 1/2 kinases: mechanism of action in vivo, pharmacokinetic/pharmacodynamic relationship, and potential for combination in preclinical models. Mol Cancer Ther 2007; 6: 2209–2219. People living with HIV have an increased risk of developing non-Hodgkin lymphoma (NHL) [1–4]. The two commonest subtypes are diffuse large B-cell lymphoma (DLBCL) and Burkitt lymphoma/leukaemia Akt inhibitor (BL), which are considered AIDS-defining illnesses (ADI). NHL is the second most common tumour in individuals with HIV and although studies show a decline in incidence since the introduction of HAART [5–8], AIDS-related lymphomas (ARLs)

have increased as a percentage of first ADI [9,10]. The development of ARL has been shown to be related to older age, low CD4 cell count and no prior treatment with HAART [11]. Patients tend to present with advanced clinical stage, B symptoms and extranodal involvement, including bone marrow. Before the introduction of HAART, the outlook for patients with ARL was poor, with the median survival for patients treated with chemotherapy being around 2–13 months. Median survival in the post-HAART era is beginning to approach that observed in the HIV-negative population and depends critically on histological subtype and stage of disease

[12–20]. The diagnosis of ARL should be based on a tissue biopsy rather than a cytological sample. In addition to the routine investigations advised as part of HIV clinical care, all patients require staging with clinical evaluation, blood tests, computerized tomography (CT) scanning and bone Hormones antagonist marrow aspiration and trephine (Table 4.1). 18fluoro-2-deoxy-D-glucose positron emission tomography (18F-FDG PET) scanning at diagnosis improves the staging accuracy and the Imaging Subcommittee of the International Harmonisation Project in Lymphoma has produced guidelines strongly recommending a baseline pretreatment 18F-FDG PET scan [21]. Cerebrospinal fluid (CSF) examination is recommended if there are clinical signs of central nervous system (CNS) disease, or paranasal sinus, breast, epidural or testicular involvement. Cytological assessment by cytospin and flow cytometry is recommended [22]. Indications for intrathecal prophylaxis will be outlined in BCSH guidelines and should be administered at time of first CSF examination in these patients.

5%) The study synbiotic, AKSB, did not demonstrate a preventativ

5%). The study synbiotic, AKSB, did not demonstrate a preventative effect against TD compared to placebo at the interim analysis (n = 174) and therefore study was halted. Although adherence to the study was less than expected, we also found no evidence that AKSB could reduce TD incidence in the 114 subjects who were fully protocol adherent. The study drug, AKSB, was found to be safe in all study participants including those older Caspase activation than 60 years (n = 46). We also demonstrated good viability

of organisms within unused capsules indicating that the AKSB synbiotic was of high quality. Probiotic studies for the prevention of TD have indeed shown variable results. Briand and colleagues did not find a protective effect with the use of L acidophilus,[20] whereas other animal[21, 22] and human studies have shown a positive preventative effect of probiotics on TD.[11, 14] Similarly, in a recent meta-analysis, selleckchem only 50% of the randomized clinical trials reported efficacy in the prevention of TD. Efficacy was reported with S boulardii, and L rhamnosus GG.[11, 13-15] Compared to placebo, S boulardii[13] decreased the incidence of TD from 39% to 29%–34% but success depended directly on the rigorous use of the preparation and only

1016 of the 3000 (34%) participants completed the study. Despite the high incidence of TD in our study, only seven subjects demonstrated carriage of a pathogen post-travel. AKSB pill microbiologic assessment showed that the capsules still contained viable organisms although there was a decline in the total CFU of probiotic Fenbendazole in approximately half of the pills returned. The medications were not required to be refrigerated but it is possible that travel to high temperature or humid climates may have affected the viability of the organisms. Limitations of this study include the lack of evidence of protocol adherence because the subjects were traveling and data were collected through self-reporting. Of those that reported compliance

only 58.2% were adherent to the protocol. There was no effective way to document reliability of the data entered into the daily diary. As less than half of the participants (43.8%) returned their pill bottles, post-travel pill count was not a reliable measure of compliance. Although there was a lack of protocol adherence, a trend toward benefit would have been expected toward reduction of TD incidence if the synbiotic had a beneficial effect. It is possible that the success of any TD prevention study will be fraught with such problems of compliance. Adherence to the study drugs (and real-life preventive medications) could potentially be increased with the use of individualized schedules, dosettes, and electronic-reminder devices including mobile smart phone-reminder utilization. These have been studied well in the HIV population for drug adherence.

The normalized assay values were analyzed statistically by single

The normalized assay values were analyzed statistically by single-factor anova at a level of significance of 0.05. DGGE was used to examine the relationship Temsirolimus chemical structure between diet and the

rumen Treponema community. The analysis was carried out in a Bio-Rad DCode Universal Mutation Detection System (Bio-Rad Laboratories, Hercules, CA). The g-TrepoF and BAC926R primers used for real-time PCR were used to amplify the V3–V5 regions of the 16S rRNA gene of Treponema in the sheep rumen samples. Genomic DNA from T. bryantii ATCC 33254 was also included in the analysis. An amplicon of c. 575 bp for DGGE analysis was obtained by modifying the reverse primer by addition of a 40-bp GC clamp (5′CGCCCGCCGCGCGCGGCGGGCGGGGCGGGGGCACGGGGGG-3′). PCR was performed with a Veriti 96-well thermal cycler (Applied Biosystems, Singapore). NVP-AUY922 supplier A reaction mixture containing 0.4 μM of each primer, 5 μL of 10 × ExTaq buffer, 0.2 μM of

each dNTP, 1.25 U ExTaq polymerase (Takara, Otsu, Japan) and 10 ng of template DNA in a total volume of 50 μL was prepared. The temperature program for cycling consisted of an initial denaturation at 94 °C for 5 min, followed by 30 cycles of 94 °C for 30 s, annealing at 64 °C for 30 s and extension at 72 °C for 30 s with a final extension at 72 °C for 5 min. PCR-amplified 16S rRNA gene fragments were separated using an 8% polyacrylamide gel with 0.5 × TAE buffer (20 mM Tris-acetate, 10 mM sodium acetate, 0.5 mM EDTA, pH 8.0) and a 35–60% linear gradient of denaturant [100% denaturant corresponded to 40% (v/v) deionized formamide and 7 M urea]. Each gel was run at 60 °C, 80 V for 16 h, and then placed in fixing

solution (10% ethanol and next 0.5% acetic acid) for 2 h, stained in 0.1% (w/v) silver nitrate solution for 20 min and developed in 1.5% sodium hydroxide (w/v), 0.1% sodium borohydride (w/v) and 0.4% formaldehyde (v/v) for 8 min. Thereafter, the gel was rinsed and kept in distilled water until the image was scanned. Gel images were analyzed by bionumerics software version 4.5 (Applied Maths, Kortrijk, Belgium). Normalized banding patterns were used to generate dendrograms by calculating Dice similarity coefficients and by an unweighted pair group method with an arithmetic average clustering algorithm. For statistical analysis, the DGGE banding patterns were converted into binary data as the presence or the absence of bands using bionumerics software, and principal component analysis (PCA) was conducted using the primer 5 data analysis software system (PRIMER-E Ltd, Plymouth, UK). Three clone libraries were constructed for the respective feeding conditions. Mixed DNA samples obtained from the rumen content DNA from three animals under the same dietary conditions were used for library construction.

This mutant was also cross-resistant to the three macrolides ment

This mutant was also cross-resistant to the three macrolides mentioned above. In this study, the selection of pleuromutilin-resistant mutants of M. gallisepticum was associated with several mutations in 23S rRNA gene. Although a single mutation could cause an increase in tiamulin and valnemulin MICs, high levels of resistance were obtained when combinations of two or three mutations were present. This explains the stepwise decrease in tiamulin and valnemulin

susceptibility observed in this study. Moreover, susceptibility to valnemulin was generally less affected by these 23S rRNA gene mutations than susceptibility to tiamulin. One possible explanation for this difference NVP-BKM120 cost is that the side chain extension of valnemulin can establish additional interactions with the binding cavity and these interactions can reduce the influence of the 23S rRNA gene mutations. Mutations in ribosome protein L3 are the most common determinant of resistance or reduced susceptibility to pleuromutilin antibiotics in several bacterial species. A point mutation in a region of ribosome protein L3 in close proximity to the peptidyl transferase center is responsible for reduced susceptibility to tiamulin in E. coli (Bøsling et al., 2003). Mutations MLN8237 in vitro in the same region of ribosome protein L3 have also been

associated with resistance or decreased susceptibility to pleuromutilins in Brachyspira spp., S. pyogenes and S. aureus (Pringle et al., 2004; Kosowska-Shick et al., 2006; Gentry et al., 2007; Miller et al., 2008). However, no mutations were found in ribosome protein L3 for any M. gallisepticum mutants selected in this study. This result indicated that mutations in ribosome protein L3 are not a preferential method to produce pleuromutilin resistance in M. gallisepticum. Mutations at positions 2032, 2055, 2447, 2499, 2504 and 2572 of 23S rRNA gene have been described

in tiamulin-selected Methamphetamine mutants of Brachyspira spp. (Pringle et al., 2004). However, these mutations were not observed in this study. Instead, mutations at positions 2058, 2059, 2061, 2447 and 2503 were found in domain V of 23S rRNA gene. Of these mutations, the A2503U mutation was present in all the mutants obtained in this study. The crystal structures of pleuromutilins binding on the 50S ribosomal subunit (Schlünzen et al., 2004; Davidovich et al., 2007) showed that A2503 is located in close proximity to the ribosomal binding sites of this class of antibiotics. Interestingly, the recently described Cfr methyltransferase, which methylates A2503 in 23S rRNA gene, can reduce the binding of tiamulin and valnemulin to ribosomes and confer resistance to both drugs in S. aureus and E. coli (Kehrenberg et al., 2005; Long et al., 2006b). Moreover, the Cfr methyltransferase also confers resistance to lincosamides and phenicols.

Despite

Despite Selleckchem Talazoparib their low atmospheric concentration, they have a large impact on atmospheric chemistry, delivering bromine and chlorine atomic radicals arising from the breakdown of methyl halides to the stratosphere where they catalyse ozone destruction. The oceans are both a source and a sink of CH3Br, but overall are a net sink (for a review of methyl halide biogeochemistry, see Schäfer et al. 2007). King & Saltzman (1997) demonstrated that biological loss rates for CH3Br in surface ocean waters were significantly higher than chemical loss rates, indicating that biological pathways existed for the removal of

CH3Br from these waters. Examination of CH3Br loss rates associated with individual size fractions of the marine biomass revealed that loss of CH3Br was associated with the fraction that encompassed

the bacterial size range. Microbial degradation of methyl halides by several metabolic pathways has been demonstrated in a range of microorganisms. Methyl halides can be co-oxidised by three different classes of monooxygenases: methane monooxygenase (Stirling & Dalton, 1979; Stirling et al., 1979), ammonia monooxygenase (Rasche et al., 1990) and toluene monooxygenase (Goodwin et al., 2005). In the methanotroph Methylomicrobium album BG8, assimilation of carbon from methyl chloride and its use as a supplementary energy source (alongside methane) has been demonstrated (Han & Semrau, 2000); however, only one pathway has been identified that is specific for methyl halide degradation in methylotrophic bacteria that Veliparib solubility dmso Glutamate dehydrogenase utilise methyl halides as sole source of carbon and energy (Vannelli et al., 1999). The initial reaction of the pathway

is catalysed by CmuA, a methyltransferase/corrinoid-binding protein that transfers the methyl group of the methyl halide to the Co atom of a corrinoid group on the same enzyme. The methyl group is next transferred to tetrahydrofolate by another methyltransferase (CmuB), and the methyl tetrahydrofolate is progressively oxidised to formate and CO2, with carbon assimilation at the level of methylene tetrahydrofolate (Vannelli et al., 1999). Several species of bacteria that use this methyltransferase-based pathway have been isolated from a range of environments, including soils, plant phyllosphere and the marine environment (Doronina et al., 1996; Connell-Hancock et al., 1998; Goodwin et al., 1998; Coulter et al., 1999; Hoeft et al., 2000; McAnulla et al., 2001; Schaefer et al., 2002; Borodina et al., 2005; Schäfer et al., 2005; Nadalig et al., 2011). The unique structure of CmuA has been exploited to design primers for studying the diversity of methyl halide-degrading bacteria in the environment (McDonald et al., 2002; Miller et al., 2004; Borodina et al.

In the present study, we investigated the regional and cellular d

In the present study, we investigated the regional and cellular distribution of CC in normal, aging and pathological mouse brains. Immunoblotting failed to detect CC protein in whole brain tissues of normal mice, as previously described. However, low proteolytic activity of CC was detected in a brain region-dependent manner, and granular immunohistochemical signals were found in neuronal perikarya of particular brain regions, including the accessory olfactory bulb, the septum, CA2 of the hippocampus, a part of the cerebral cortex, the medial geniculate, and the inferior colliculus. In aged mice, the number of CC-positive neurons increased to some extent. The protein

level of CC and its proteolytic activity showed significant increases in particular brain regions of mouse models with Palbociclib molecular weight pathological conditions – the thalamus in cathepsin D-deficient mice, the hippocampus of ipsilateral brain hemispheres after hypoxic–ischemic brain injury, and peri-damaged portions of brains after penetrating injury. In such pathological conditions, the majority of the cells that were strongly immunopositive for CC were activated microglia. These lines of evidence suggest that CC is involved in normal neuronal function in certain brain regions, and also participates

click here in inflammatory processes accompanying pathogenesis in the CNS. “
“Adult rats exposed to the DNA-methylating agent methylazoxymethanol on embryonic day 17 show a pattern of neurobiological deficits that model some of the neuropathological and behavioral changes observed in schizophrenia. Although it is generally assumed that these changes reflect targeted disruption of embryonic neurogenesis, it is unknown whether these effects generalise to other antimitotic agents administered at

different stages of development. In the present study, neurochemical, behavioral and electrophysiological techniques were used to determine whether exposure to the antimitotic agent Ara-C later in development recapitulates some of the changes observed in methylazoxymethanol (MAM)-treated animals and in patients with schizophrenia. Male rats exposed to Ara-C (30 mg/kg/day) at embryonic days 19.5 and 20.5 show reduced cell numbers and heterotopias in hippocampal CA1 and CA2/3 regions, Resveratrol respectively, as well as cell loss in the superficial layers of the pre- and infralimbic cortex. Birth date labeling with bromodeoxyuridine reveals that the cytoarchitectural changes in CA2/3 are a consequence rather that a direct result of disrupted cortical neurogenesis. Ara-C-treated rats possess elevated levels of cortical dopamine and DOPAC (3,4-didyhydroxypheylacetic acid) but no change in norepinephrine or serotonin. Ara-C-treated rats are impaired in their ability to learn the Morris water maze task and showed diminished synaptic plasticity in the hippocampocortical pathway. These data indicate that disruption of neurogenesis at embryonic days 19.5 and 20.