[Ortho-geriatric rehabilitation: challenges and impact]. / Réadaptation ortho-gériatrique : enjeux et impact.

The risk of developing functional dependence rises with age. Following an acute event, a rehabilitation stay is often needed to restore functional capacities and consider home discharge. The geriatric rehabilitation process usually involves standardized multidisciplinary management, setting and frequent reviewing of the goals, and a discharge plan. In a retrospective observational study conducted in orthogeriatric rehabilitation conducted in Geneva, comorbidities, functional status at admission, and length of stay appear to have a significant impact on recovery potential and destination at discharge, whereas the intensity of the rehabilitation program (number of therapies per week) does not influence patient outcome.

Le risque de développer une dépendance fonctionnelle augmente avec l'âge. À la suite d'un événement aigu, un séjour en réadaptation est souvent nécessaire pour restaurer les capacités fonctionnelles et permettre un retour à domicile. Le processus de réadaptation gériatrique comporte une prise en charge standardisée pluridisciplinaire, la fixation et la révision régulière d'objectifs et la planification de la sortie. Dans une étude observationnelle rétrospective en réadaptation ortho-gériatrique menée à Genève, les comorbidités, l'état fonctionnel à l'admission et la durée de séjour prédisent les chances de récupération fonctionnelle et le retour à domicile, tandis que l'intensité du programme (nombre de thérapies par semaine) n'influence pas le devenir du patient.

Separation and identification of candidate protein elicitors from the cultivation medium of Leptosphaeria maculans inducing resistance in Brassica napus.

The Dothideomycete Leptosphaeria maculans, a worldwide fungal pathogen of oilseed rape (Brassica napus), secretes a broad spectrum of molecules into the cultivation medium during growth in vitro. Here, candidate elicitor molecules, which induce resistance in B. napus to L. maculans, were identified in the cultivation medium. The elicitation activity was indicated by increased transcription of pathogenesis-related gene 1 (PR1) and enhanced resistance of B. napus plants to the invasion of L. maculans. The elicitation activity was significantly lowered when the cultivation medium was heated to 80°C. Active components were further characterized by specific cleavage with the proteolytic enzymes trypsin and proteinase K and with glycosidases α-amylase and ß-glucanase. The elicitor activity was eliminated by proteolytic digestion while glycosidases had no effect. The filtered medium was fractionated by either ion-exchange chromatography or isoelectric focusing. Mass spectrometry analysis of the most active fractions obtained by both separation procedures revealed predominantly enzymes that can be involved in the degradation of plant cell wall polysaccharides. This is the first study searching for L. maculans-specific secreted elicitors with a potential to be used as defense-activating agents in the protection of B. napus against L. maculans in agriculture. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:918-928, 2016.

Cell wall components of Leptosphaeria maculans enhance resistance of Brassica napus.

Preparations with elicitation activity were obtained from the mycelium of Leptosphaeria maculans , a fungal pathogen of oilseed rape (Brassica napus). Crude delipidated and deproteinized extract from fungal cell walls induced expression of pathogenesis related gene 1 (PR1), hydrogen peroxide accumulation, and enhanced resistance of B. napus plants toward infection by L. maculans. Elicitation activity significantly decreased after treatment of a crude extract with α- or ß-glucanase. Monosaccharide composition analysis of a crude extract purified by ion-exchange chromatography revealed glucose (∼58 mol %), mannose (∼22 mol %), and galactose (∼18 mol %) as the major sugars. FT-IR and NMR spectra confirmed the presence of both carbohydrate and polypeptide components in the purified product. Correlation NMR experiments defined trisaccharide bound to O-3 of serine residue α-D-Glcp-(1→2)-ß-D-Galf-(1→6)-α-D-Manp-(1→3)-L-Ser. Terminal α-D-Glcp and (1→6)-ß-D-glucan were also detected. The obtained results strongly support the conclusion that these carbohydrates induce defense response in B. napus plants.