Gene expression changes following extinction testing in a heroin behavioral incubation model

<p>Abstract</p> <p>Background</p> <p>A number of gene expression studies have investigated changes induced by drug exposure, but few reports describe changes that persist following relapse. In this study, genome-wide analysis of gene expression was conducted following an extinction session (90 min) in rats that expressed behavioral incubation of heroin-seeking and goal-directed behavior. As an important modulator of goal-directed behavior, the medial prefrontal cortex (mPFC) was the target of genomic analysis. Rats were trained to self-administer heroin during 3 h daily sessions for 14 d. Following the self-administration period, rats were reintroduced to the self-administration chambers for a 90-minute extinction session in which they could seek heroin, but received none. Extinction sessions were conducted on groups after either 1 d or 14 d of drug-free enforced abstinence to demonstrate behavioral incubation.</p> <p>Results</p> <p>Behavioral data demonstrated incubation (increased expression) of heroin-seeking and goal-directed behavior after the 14 d abstinent period. That is, following 14 d of enforced abstinence, animals displayed heightened drug-seeking behavior when returned to the environment where they had previously received heroin. This increased drug-seeking took place despite the fact that they received no drug during this extinction session. Whole genome gene expression analysis was performed and results were confirmed by quantitative real-time PCR (RT-qPCR). Microarrays identified 66 genes whose expression was identified as changed by at least 1.4 fold (p < 0.02) following 14 d of abstinence and the 90-minute extinction session compared to the saline treated controls. Orthogonal confirmation by RT-qPCR demonstrated significant alterations in <it>bdnf</it>, <it>calb1</it>, <it>dusp5</it>, <it>dusp6</it>, <it>egr1</it>, <it>npy</it>, <it>rgs2</it>.</p> <p>Conclusion</p> <p>Ontological analysis indicates that several of the genes confirmed to be changed are important for neuroplasticity, and through that role may impact learning and behavior. The importance of drug-seeking behavior and memory of previous drug-taking sessions suggest that such genes may be important for relapse. The global gene expression analysis adds to the knowledge of heroin-induced changes and further highlights similarities between heroin and other drugs of abuse.</p

The Ursinus Weekly, May 11, 1964

New Lost City Ramblers to perform Friday: Agency sponsors blue grass group • Bombers bombed by MSGA, faculty reviewing • UC scholar wins St. Andrews scholarship • Survey supports APO projects • Loved you Conrad : Spring festival succeeds with new program • Bible fellowship • Two classes elect officers today • Pi Nu Epsilon inducts members • Ursinus Circle • Obituary • Editorial: Attention administration • Mr. Pennypacker stages a remarkable performance: Robbins, Sinclair, Auchincloss and Matusow star in production • Spring hits UC campus with sun, fun and studies • Next President: Johnson • Letter to the Editor • Ursinus thinclads retain MAC crown: Cooper wins two, Dunn ties 440 record; Gladstone, Robart, Walter, relay take 1st • Softballers win; Season undefeated • Batsmen even for week: Defeated Drexel, split with Haverford and lost to LaSalle • Tennis loses 3rd; Bryn Mawr takes 4 • Lacrosse wins 4th; Swamp E-burg 13-3 • MAC summary • Greek gleaningshttps://digitalcommons.ursinus.edu/weekly/3110/thumbnail.jp

Exploitation of the Timing Capabilities of Metallic Magnetic Calorimeters for a Coincidence Measurement Scheme

In this report, we compare two filter algorithms for extracting timing information using novel metallic magnetic calorimeter detectors, applied to the precision X-ray spectroscopy of highly charged ions in a storage ring. Accurate timing information is crucial when exploiting coincidence conditions for background suppression to obtain clean spectra. For X-rays emitted by charge-changing interactions between ions and a target, this is a well-established technique when relying on conventional semiconductor detectors that offer a good temporal resolution. However, until recently, such a coincidence scheme had never been realized with metallic magnetic calorimeters, which typically feature much longer signal rise times. In this report, we present optimized timing filter algorithms for this type of detector. Their application to experimental data recently obtained at the electron cooler of CRYRING@ESR at GSI, Darmstadt is discussed

The association between histamine 2 receptor antagonist use and Clostridium difficile infection: a systematic review and meta-analysis.

Background Clostridium difficile infection (CDI) is a major health problem. Epidemiological evidence suggests that there is an association between acid suppression therapy and development of CDI. Purpose We sought to systematically review the literature that examined the association between histamine 2 receptor antagonists (H2RAs) and CDI. Data source We searched Medline, Current Contents, Embase, ISI Web of Science and Elsevier Scopus from 1990 to 2012 for all analytical studies that examined the association between H2RAs and CDI. Study selection Two authors independently reviewed the studies for eligibility. Data extraction Data about studies characteristics, adjusted effect estimates and quality were extracted. Data synthesis Thirty-five observations from 33 eligible studies that included 201834 participants were analyzed. Studies were performed in 6 countries and nine of them were multicenter. Most studies did not specify the type or duration of H2RAs therapy. The pooled effect estimate was 1.44, 95% CI (1.22–1.7), I2 = 70.5%. This association was consistent across different subgroups (by study design and country) and there was no evidence of publication bias. The pooled effect estimate for high quality studies was 1.39 (1.15–1.68), I2 = 72.3%. Meta-regression analysis of 10 study-level variables did not identify sources of heterogeneity. In a speculative analysis, the number needed to harm (NNH) with H2RAs at 14 days after hospital admission in patients receiving antibiotics or not was 58, 95% CI (37, 115) and 425, 95% CI (267, 848), respectively. For the general population, the NNH at 1 year was 4549, 95% CI (2860, 9097). Conclusion In this rigorous systematic review and meta-analysis, we observed an association between H2RAs and CDI. The absolute risk of CDI associated with H2RAs is highest in hospitalized patients receiving antibiotics

Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR

We report on a new experimental approach for the Doppler correction of X-rays emitted by heavy ions, using novel metallic magnetic calorimeter detectors which uniquely combine a high spectral resolution with a broad bandwidth acceptance. The measurement was carried out at the electron cooler of CRYRING@ESR at GSI, Darmstadt, Germany. The X-ray emission associated with the radiative recombination of cooler electrons and stored hydrogen-like uranium ions was investigated using two novel microcalorimeter detectors positioned under 0∘ and 180∘ with respect to the ion beam axis. This new experimental setup allowed the investigation of the region of the N, M → L transitions in helium-like uranium with a spectral resolution unmatched by previous studies using conventional semiconductor X-ray detectors. When assuming that the rest-frame energy of at least a few of the recorded transitions is well-known from theory or experiments, a precise measurement of the Doppler shifted line positions in the laboratory system can be used to determine the ion beam velocity using only spectral information. The spectral resolution achievable with microcalorimeter detectors should, for the first time, allow intrinsic Doppler correction to be performed for the precision X-ray spectroscopy of stored heavy ions. A comparison with data from a previous experiment at the ESR electron cooler, as well as the conventional method of conducting Doppler correction using electron cooler parameters, will be discussed

Síndrome de Sampson: Sampson Syndrome

Introdução: a endometriose é uma doença que acomete, principalmente, mulheres em idade fértil entre 20-30 anos, caracterizada por presença de tecido endometrial nas cavidades, tecidos e órgãos extrauterinos, que cursam com sintomatologia principal: dor pélvica e/ou infertilidade. Apresentação do caso: paciente com 23 anos, sexo feminino, com desejo de engravidar, cessou o uso de contraceptivos há 12 meses. Em consulta ginecológica, refere que vem apresentando quadro de dor.&nbsp; Discussão: Há manifestações assintomáticas ou oligossintomáticas, a depender do grau de acometimento bem como localização de tecido endometrial ectópico. As lesões da síndrome de Sampson costumam ser bem pequenas e dispersas, exames de ressonância magnética ou ultrassonografia costumam ser inconclusivos para esse tipo de endometriose, pois os nódulos geralmente apresentam-se como imagens sólidas, hipoecogênicas e irregulares. Desse modo, por se tratar de lesões extremamente pequenas, exames de imagem podem não ser eficazes em sua detecção. Conclusão: A etiologia da doença ainda é desconhecida, entretanto existem algumas hipóteses como metaplasia celômica, remanescentes embrionários e menstruação retrógrada

Síndrome de malformação cavernomatosa múltipla familiar: Familial multiple cavernomatous malformation syndrome

Introdução: A Síndrome da má formação cavernomatosa múltipla familiar ocorre principalmente em adultos jovens, e é encontrada no sistema nervoso, com predominância no encéfalo. As cavernomas são lesões raras de malformações vasculares do sistema nervoso central, podendo acometer igualmente indivíduos de ambos os sexos, embora sejam mais comuns em pacientes na terceira e quinta década de vida. Apresentação do caso: Paciente com 36 anos, do sexo feminino, admitida no Pronto Atendimento Municipal de Pindamonhangaba, após episódio de cefaleia de forte intensidade e crise convulsiva tônico-clônica generalizada. A paciente apresentou exame neurológico normal a não ser pelo déficit focal no membro superior direito. Foi realizado procedimento cirúrgico para exérese de lesões e também tecidos anormais adjacentes. Discussão: Existem pacientes assintomáticos e os que apresentam queixas, sendo as mais comuns, a depender do local de acometimento, tamanho e extensão de sangramento, a cefaleia, crise convulsiva e/ou déficit focal. A síndrome se mostrava como uma má formação cerebrovascular oculta e desconhecida, mas com a evolução dos exames de imagem foi possível realizar um melhor diagnóstico e avaliar as características da comorbidade. A Ressonância Nuclear Magnética é considerada o exame padrão-ouro para diagnóstico. Conclusão: A patologia possui origem hereditária em 30-40% dos casos, associada a mutação que leva a perda de função do gene KRIT1 (CCM1), malcavernin (CCM2) e PDC10 (CCM3). Torna-se aconselhável a observação clínica do paciente, e estratégias para controle dos sinais e sintomas. Em casos de lesões profundas no córtex e em locais, indica-se a radiocirurgia na tentativa de interromper a progressão da doença