Search results for "E-F"

Leucine-58 in the putative 5th helical region of human interleukin (IL)-6 is important for activation of the IL-6 signal transducer, gp130

1995

A model of the tertiary structure of human IL-6, derived from the crystal-structure of granulocyte-colony stimulating factor, reveals a 5th helical region in the loop between the first and second alpha-helix. To investigate the importance of this region for biological activity of IL-6, residues Glu-52, Ser-53, Ser-54, Lys-55, Glu-56, Leu-58, and Glu-60 were individually replaced by alanine. IL-6.Leu-58Ala displayed a 5-fold reduced biological activity on the IL-6 responsive human cell lines XG-1 and A375. This reduction in bioactivity was shown to be due to a decreased capacity of the mutant protein to trigger IL-6 receptor-alpha-chain-dependent binding to the IL-6 signal transducer, gp130.

The membrane distal half of gp130 is responsible for the formation of a ternary complex with IL-6 and the IL-6 receptor

1995

AbstractGp130 is the signal transducing subunit of the interleukin-6 receptor. Signaling is initiated by the complex formation of gp130 with IL-6 bound to the IL-6 receptor (IL-6R). We have subdivided the extracellular domain of gp130 in two parts and expressed the mutant proteins as soluble IgG fusion proteins in COS-7 cells. By studying the formation of the ternary complex we show that the membrane distal half of gp130 which contains a cytokine receptor domain is responsible for the interaction with the IL-6/IL-6R complex. Interestingly this is the same region which is believed to be involved in specific recognition of the related cytokines LIF, OM, and probably also of CNTF and IL-11.

Monumenti della natura: i castagni dell'Etna - Natural monuments: Mount Etna's chestnut trees

2017

L’articolo premette l’importanza che hanno le antiche essenze arboree nel paesaggio italiano. si sofferma poi sulla necessità di un censimento continuo della conoscenza, della conservazione e della loro messa in valore e cita alcune delle normative esistenti nel territorio nazionale. Infine, tra i monumenti dal ‘naturale portento’, il saggio si sofferma sui castagni dell’Etna, che tanta meraviglia hanno suscitato tra i viaggiatori del sec. XVIII e che continuano ancora oggi a stupire ed emozionare. The article addresses the importance of ancient tree crops in the Italian landscape. It dwells on the need for a long-standing census on knowledge, preservation and promotion of these trees and q…

Mott-Schottky analysis of differential capacitance data of passive-film electrolyte junctions. Is it really providing correct physical insights on th…

2009

: Noeud visuel, site monastique, production d'image

2018

Le manuscrit 1 conservé à la Bibliothèque municipale de Semur est l’un des plus anciens manuscrits conservés en Bourgogne, sinon le plus ancien, pour les uns à dater autour de l’an mil, pour les autres à rattacher, vers la même époque, au grand mouvement des « abbés réformateurs » et aux livrets hagio-liturgiques de prestige. C’est un recueil composite, de 260 mm par 207, comprenant 78 feuillets réunis en cahiers, et provenant de l’abbaye de Saint-Jean de Réôme (Moutiers-Saint-Jean), en Côte-d’Or. Les différentes pièces qui le composent furent probablement réalisées entre le Xe et le XVe siècle ; la reliure en carton date de 1834.Au fil de son histoire, au cours des différentes étapes de sa…

Understanding melt generation beneath the slow-spreading Kolbeinsey Ridge using 238U, 230Th, and 231Pa excesses

2011

International audience; To examine the petrogenesis and sources of basalts from the Kolbeinsey Ridge, one of the shallowest locations along the global ridge system, we present new measurements of Nd, Sr, Hf, and Pb isotopes and U-series disequilibria on 32 axial basalts. Young Kolbeinsey basalts (full-spreading rate = 1.8 cm/yr; 67 degrees 05'-70 degrees 26'N) display ((230)Th/(238)U) 1 with ((230)Th/(238)U) from 0.95 to 1.30 and have low U (11.3-65.6 ppb) and Th (33.0 ppb-2.40 ppm) concentrations. Except for characteristic isotopic enrichment near the Jan Mayen region, the otherwise depleted Kolbeinsey basalts (e. g. (87)Sr/(86)Sr = 0.70272-0.70301, epsilon(Nd) = 8.4-10.5, epsilon(Hf) = 15…

Multiplicity and history have a detrimental effect on survival in patients with T1G3 bladder tumors selected for conservative treatment.

2008

Purpose: In the absence of Tis tumor we assessed whether history and multiplicity have a detrimental effect on conservative treatment in carefully selected patients with T1G3 bladder carcinoma. Materials and Methods: Between January 1976 and December 1999, 165 select patients with T1G3 bladder tumors were conservatively treated with transurethral resection plus adjuvant intravesical therapy. Patients with concomitant or previous Tis, previous T1G3, tumor size greater than 3 cm and more than 3 lesions were excluded from analysis. Repeat transurethral resection was not routinely performed. However, cytology had to be negative for atypia before the start of adjuvant intravesical therapy. Resul…

Renal tumour surgery in elderly patients.

2008

OBJECTIVE To analyse morbidity, renal function and oncological outcome in patients aged ≥80 years who had surgery for renal tumours, as in the elderly such surgery is controversial in relation to life-expectancy and other causes of death. PATIENTS AND METHODS Between 1990 and 2006, in our institution 1625 patients had surgery to treat solid renal tumours suspected to be renal cell carcinoma (RCC); 62 (4%) were aged ≥80 years (mean 82.5), and 73% of these elderly patients had radical nephrectomy (RN) and 27% nephron-sparing surgery (NSS). Results The median (range) follow-up was 3.1 (0.2–14.1) years (89% of the patients). There was no perioperative mortality. There were only minor complicati…

Predictors of oncological outcomes in T1G3 patients treated with BCG who undergo radical cystectomy

2018

PURPOSE: To evaluate the oncological impact of postponing radical cystectomy (RC) to allow further conservative therapies prior to progression in a large multicentre retrospective cohort of T1-HG/G3 patients initially treated with BCG. METHODS: According to the time of RC, the population was divided into 3 groups: patients who did not progress to muscle-invasive disease, patients who progressed before radical cystectomy and patients who experienced progression at the time of radical cystectomy. Clinical and pathological outcomes were compared across the three groups. RESULTS: Of 2451 patients, 509 (20.8%) underwent RC. Patients with tumors > 3 cm or with CIS had earlier cystectomies (HR = 1…

Implications of irradiating the subventricular zone stem cell niche

2016

Radiation therapy is a standard treatment for brain tumor patients. However, it comes with side effects, such as neurological deficits. While likely multi-factorial, the effect may in part be associated with the impact of radiation on the neurogenic niches. In the adult mammalian brain, the neurogenic niches are localized in the subventricular zone (SVZ) of the lateral ventricles and the dentate gyrus of the hippocampus, where the neural stem cells (NSCs) reside. Several reports showed that radiation produces a drastic decrease in the proliferative capacity of these regions, which is related to functional decline. In particular, radiation to the SVZ led to a reduced long-term olfactory memo…