1,529 research outputs found
Induction of Stress Granule Assembly is Essential for the Orchestration of DNA Damage Response
DNA damage provokes several responses including DNA repair, cell cycle regulation and apoptosis that collectively represent the DNA damage response (DDR). Here, we demonstrate that the DDR incorporates the activation of stress granule (SG) formation pathway as a mechanism to process destabilized RNAs. UV irradiation induced the assembly of SGs during the G2 phase and newly formed SGs appeared exclusively in the early G1 phase. SG assembly pathway was activated within the first hours after DNA damage, suggesting that the processing of destabilized RNAs is activated at an early stage. The induction of SGs and RNAi effector protein Argonaute 2 recruitment after UV exposure was independent of ATM and ATR signaling cascades. Apoptosis occurred only in SG-negative cells indicating that SGs promote cell survival after genotoxic stress. Analysis of several DNA damage/repair deficient MEFs revealed that the SG accumulation remained unaltered after UV exposure. Our results show that SGs are an essential component of DDR that is activated in parallel to the DNA damage kinase response networks
Lamvitaliteit bij melkschapen
In de biologische melkschapenhouderij is de lammerensterfte relatief hoog. De sector wil de sterfte graag verminderen. In dit BioKennisbericht enkele tips en aanbevelingen naar aanleiding van onderzoek door Wageningen UR Livestock Research. De lamvitaliteit blijkt verbeterd te kunnen worden door een betere biestopname, een lagere besmettingsdruk, beter (gebruik van) managementinformatie en het inkruisen van andere rassen
Incidenteel problemen met oormerken bij schapen
Een beperkt aantal meldt veel verwondingen, ontstekingen, slaphangende oren of verlies. De kans op deze problemen neemt af door het oormerk op de juiste plaats in te brengen
Reduction of salt: will iodine intake remain adequate in The Netherlands?
Salt is the main vehicle for iodine fortification in The Netherlands. A reduction in salt intake may reduce the supply of iodine. Our aim was to quantify the effect of salt reduction on the habitual iodine intake of the Dutch population and the risk of inadequate iodine intake. We used data of the Dutch National Food Consumption Survey (1997–8) and an update of the food composition database to estimate habitual salt and iodine intake. To take into account uncertainty about the use of iodised salt (industrial and discretionary) and food supplements, a simulation model was used. Habitual iodine and salt intakes were simulated for scenarios of salt reduction and compared with no salt reduction. With 12, 25 and 50 % salt reduction in industrially processed foods, the iodine intake remained adequate for a large part of the Dutch population. For the extreme scenario of a 50 % reduction in both industrially and discretionary added salt, iodine intake might become inadequate for part of the Dutch population (up to 10 %). An increment of the proportion of industrially processed foods using iodised salt or a small increase in iodine salt content will solve this. Nevertheless, 8–35 % of 1- to 3-year-old children might have iodine intakes below the corresponding estimated average requirement (EAR), depending on the salt intake scenario. This points out the need to review the EAR value for this age group or to suggest the addition of iodine to industrially manufactured complementary food
Leverbot in kaart gebracht
Dairy cows grazing outside, or fed indoors with fresh grass, are increasingly infected by liver fluke, a parasitic flatworm. Losses resulting from liver fluke disease are generally underestimated, but include growth retardation, reduced resistance, lower milk production, and rejection of infected livers at the slaughterhouse
Kijk lam vaker in ogen
Aan de kleur van het ooglid kan worden afgelezen of een lam lijdt aan bloedarmoede, als gevolg van haemonchose. Op basis van deze waarneming kunnen alleen de lammeren die lijden aan haemonchose worden ontwormd. Dit minimaliseert de selectie op resistente maagdarmwormen en maximaliseert het behoud van de effectiviteit van het gebruikte middel op het bedrij
Voeding van melkschapen
In dit rapport is een studie uitgevoerd naar voeding van melkschapen, bestaand uit literatuuronderzoek, een praktijkorientatie en knelpunten in voeding bij traditionele en biologische melkschapenhouderi
Mogelijkheden aangepast beheer zeedijken met schapen
Om meer inzicht te krijgen in het gewenste dijkbeheer voor een voldoende erosiebestendige grasbekleding is in het najaar van 1999 het beheer van de zeedijken geonventariseerd zoals 18 schapenhouders in Zeeland, Noord-Holland en Friesland dat in het voorliggende jaar hadden uitgevoerd
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