45 research outputs found
Irregularity of an analogue of the Gauss-Manin systems
In the D-modules theory, Gauss-Manin systems are defined by the direct image
of the structure sheaf O by a morphism. A major theorem says that these systems
have only regular singularities. This paper examines the irregularity of an
analogue of the Gauss-Manin systems. It consists in the direct image complex of
a D-module twisted by the exponential of a polynomial g by another polynomial
f, where f and g are two polynomials in two variables. The analogue of the
Gauss-Manin systems can have irregular singularities (at finite distance and at
infinity). We express an invariant associated with the irregularity of these
systems by the geometry of the map (f,g)
Formal structure of direct image of holonomic D-modules of exponential type
We compute formal invariants associated with the cohomology sheaves of the
direct image of holonomic D-modules of exponential type. We also prove that
every formal C[[t]]-modules is isomorphic, after a ramification, to
a germ of formalized direct image of analytic D-module of exponential type.Comment: 19 pages, 5 figures, supported by a fellowship of the Deutsche
Forschungsgemeinschaft. Revised versio
Le Probleme de tournees de vehicules : etude et resolution approchee
Résumé disponible dans le fichier PD
Interferon α kinoid induces neutralizing anti-interferon α antibodies that decrease the expression of interferon-induced and B cell activation associated transcripts: analysis of extended follow-up data from the interferon α kinoid phase I/II study.
IFN α Kinoid (IFN-K) is a therapeutic vaccine composed of IFNα2b coupled to a carrier protein. In a phase I/II placebo-controlled trial, we observed that IFN-K significantly decreases the IFN gene signature in whole blood RNA samples from SLE patients. Here, we analysed extended follow-up data from IFN-K-treated patients, in order to evaluate persistence of neutralizing anti-IFNα Abs antibodies (Abs), and gene expression profiling.
Serum and whole blood RNA samples were obtained in IFN-K-treated patients included in the follow-up study, in order to determine binding and neutralizing anti-IFNα Ab titres, and perform high-throughput transcriptomic studies.
Neutralization studies of 13 IFNα subtypes demonstrated the polyclonal nature of the Ab response induced by IFN-K. Follow-up analyses in six patients confirmed a significant correlation between neutralizing anti-IFNα Ab titres and decrease in IFN scores compared to baseline. These analyses also revealed an inhibitory effect of IFNα blockade on the expression of B cell associated transcripts.
IFN-K induces a polyclonal anti-IFNα response that decreases IFN- and B cell-associated transcripts.
ClinicalTrials.gov, clinicaltrials.gov, NCT01058343