University of Amsterdam

About: University of Amsterdam is a education organization based out in Amsterdam, Noord-Holland, Netherlands. It is known for research contribution in the topics: Population & Randomized controlled trial. The organization has 59309 authors who have published 140894 publications receiving 5984137 citations. The organization is also known as: UvA & Universiteit van Amsterdam.

Educational leadership and student achievement: The elusive search for an association

Abstract: This study revisits the existing scholarly debate on the possible impact of the principal's leadership on student achievement. Both `direct effect' and `indirect effect' models are discussed. A quantitative meta-analysis examines to what extent principals directly affect student outcomes. The small positive effects found in this meta-analysis confirm earlier research findings on the limitations of the direct effects approach to linking leadership with student achievement. Finally, lines of future research inquiry are discussed.

Reappraisal of European guidelines on hypertension management:: A European Society of Hypertension Task Force document

Abstract: ACEangiotensin-converting enzymeBPblood pressureDBPdiastolic blood pressureeGFRestimated glomerular filtration rateESCEuropean Society of CardiologyESHEuropean Society of HypertensionETendothelinIM...

Duration of androgen suppression in the treatment of prostate cancer.

Abstract: Background The combination of radiotherapy plus long-term medical suppression of androgens (≥2 years) improves overall survival in patients with locally advanced prostate cancer We compared the use of radiotherapy plus short-term androgen suppression with the use of radiotherapy plus long-term androgen suppression in the treatment of locally advanced prostate cancer Methods We randomly assigned patients with locally advanced prostate cancer who had received external-beam radiotherapy plus 6 months of androgen suppression to two groups, one to receive no further treatment (short-term suppression) and the other to receive 25 years of further treatment with a luteinizing hormone–releasing hormone agonist (long-term suppression) An outcome of noninferiority of short-term androgen suppression as compared with long-term suppression required a hazard ratio of more than 135 for overall survival, with a one-sided alpha level of 005 An interim analysis showed futility, and the results are presented with an a

A Next-Generation Cleaved, Soluble HIV-1 Env Trimer, BG505 SOSIP.664 gp140, Expresses Multiple Epitopes for Broadly Neutralizing but Not Non-Neutralizing Antibodies

Abstract: A desirable but as yet unachieved property of a human immunodeficiency virus type 1 (HIV-1) vaccine candidate is the ability to induce broadly neutralizing antibodies (bNAbs). One approach to the problem is to create trimeric mimics of the native envelope glycoprotein (Env) spike that expose as many bNAb epitopes as possible, while occluding those for non-neutralizing antibodies (non-NAbs). Here, we describe the design and properties of soluble, cleaved SOSIP.664 gp140 trimers based on the subtype A transmitted/founder strain, BG505. These trimers are highly stable, more so even than the corresponding gp120 monomer, as judged by differential scanning calorimetry. They are also homogenous and closely resemble native virus spikes when visualized by negative stain electron microscopy (EM). We used several techniques, including ELISA and surface plasmon resonance (SPR), to determine the relationship between the ability of monoclonal antibodies (MAbs) to bind the soluble trimers and neutralize the corresponding virus. In general, the concordance was excellent, in that virtually all bNAbs against multiple neutralizing epitopes on HIV-1 Env were highly reactive with the BG505 SOSIP.664 gp140 trimers, including quaternary epitopes (CH01, PG9, PG16 and PGT145). Conversely, non-NAbs to the CD4-binding site, CD4-induced epitopes or gp41ECTO did not react with the trimers, even when their epitopes were present on simpler forms of Env (e.g. gp120 monomers or dissociated gp41 subunits). Three non-neutralizing MAbs to V3 epitopes did, however, react strongly with the trimers but only by ELISA, and not at all by SPR and to only a limited extent by EM. These new soluble trimers are useful for structural studies and are being assessed for their performance as immunogens.

2010 update of the ASAS/EULAR recommendations for the management of ankylosing spondylitis

Abstract: This fi rst up date of the ASAS/EULAR recommendations on the management of anky lo sing spondylitis (AS) is based on the original paper, a systematic review of existing recommendations and the literature since 2005 and the discussion and agreement among 21 international experts, 2 patients and 2 physiotherapists in a meeting in February 2010. Each original bullet point was discussed in de tail and rewor ded if necessary. Decisions on new re com men da tions were made — if necessary after voting. The strength of the recommen dations (SOR) was scored on an 11-point nume rical rating scale after the meeting by email. These recommendations apply to patients of all ages that fulfi ll the modifi ed NY criteria for AS, independent of extra-ar ticu lar manifestations, and they take into ac count all drug and non-drug interventions related to AS. Four overarching principles were introduced, implying that one bullet has been moved to this section. There are now 11 bullet points in clu ding 2 new ones, one related to extra-articular manife sta tions and one to changes in the disease course. With a mean score of 9.1 (range 8-10) the SOR was generally very good.