Limits to sustained energy intake. XXIII. Does heat dissipation capacity limit the energy budget of lactating bank voles?

Acknowledgements We are grateful to our technicians and several students for their help during this study and for animal care. We thank Catherine Hambly and Peter Thompson for technical assistance for the isotope analysis for the DLW measurements. We thank Ulf Bauchinger for stimulating discussion and his comments, and two anonymous referees for comments on the manuscript. Funding This project was supported by grants from the Polish Ministry of Science and Higher Education [0595/B/P01/2011/40 to E.T.S. and 8167/B/P01/2011/40 to P.K.], and Jagiellonian University [DS/WBINOZ/INOS/757 to P.K.].Peer reviewedPublisher PD

Pandemic legislation in the European Union: Fit for purpose? The need for a systematic comparison of national laws.

Sound governance is central to effective pandemic management. Key international legal instruments governing pandemic management in the European Union (EU): the International Health Regulations (2005) and Decision 1082/13 require EU Member States to develop national plans and invite them to establish national legal frameworks to support compliance with this international legislation. Although Member States may design the legal framework as they choose, the strongest instrument of pandemic governance is national legislation. It is currently unclear what national pandemic governance exists in Member States as it has not been mapped, i.e. identified and collated. Legal analysis and empirical evaluation of implementation and impact have therefore not been possible. We propose comprehensive mapping to create the necessary comparative data for legal analysis assessing national legislation's compliance with international obligations and ethical principles. Empirical research could evaluate its effectiveness in promoting cross-border coherence and robust emergency response. We draw on the U.S. experience with "policy surveillance", the systematic scientific mapping of laws of public health importance. Until national pandemic governance is mapped and evaluated, we cannot know if it is lawful, ethical or effective

Trapped in the darkness of the night: thermal and energetic constraints of daylight flight in bats

Bats are one of the most successful mammalian groups, even though their foraging activities are restricted to the hours of twilight and night-time. Some studies suggested that bats became nocturnal because of overheating when flying in daylight. This is because—in contrast to feathered wings of birds—dark and naked wing membranes of bats efficiently absorb short-wave solar radiation. We hypothesized that bats face elevated flight costs during daylight flights, since we expected them to alter wing-beat kinematics to reduce heat load by solar radiation. To test this assumption, we measured metabolic rate and body temperature during short flights in the tropical short-tailed fruit bat Carollia perspicillata at night and during the day. Core body temperature of flying bats differed by no more than 2°C between night and daytime flights, whereas mass-specific CO2 production rates were higher by 15 per cent during daytime. We conclude that increased flight costs only render diurnal bat flights profitable when the relative energy gain during daytime is high and risk of predation is low. Ancestral bats possibly have evolved dark-skinned wing membranes to reduce nocturnal predation, but a low degree of reflectance of wing membranes made them also prone to overheating and elevated energy costs during daylight flights. In consequence, bats may have become trapped in the darkness of the night once dark-skinned wing membranes had evolved

Elevated O-GlcNAc levels activate epigenetically repressed genes and delay mouse ES cell differentiation without affecting naive to primed cell transition

The differentiation of mouse embryonic stem (ES) cells is controlled by the interaction of multiple signaling pathways, typically mediated by post-translational protein modifications. The addition of O-linked N-acetylglucosamine (O-GlcNAc) to serine and threonine residues of nuclear and cytoplasmic proteins is one such modification (O-GlcNAcylation), whose function in ES cells is only now beginning to be elucidated. Here we demonstrate that the specific inhibition of O-GlcNAc hydrolase (Oga) causes increased levels of protein O-GlcNAcylation and impairs differentiation of mouse ES cells both in serum-free monolayer and in embryoid bodies (EBs). Use of reporter cell lines demonstrates that Oga inhibition leads to a reduction in the number of Sox1-expressing neural progenitors generated following induction of neural differentiation, as well as maintained expression of the ES cell marker Oct4 (Pou5f1). In EBs expression of mesodermal and endodermal markers is also delayed. However, the transition of naïve cells to primed pluripotency indicated by Rex1 (Zfp42), Nanog, Esrrb and Dppa3 downregulation and Fgf5 upregulation remains unchanged. Finally, we demonstrate that increased O-GlcNAcylation results in upregulation of genes normally epigenetically silenced in ES cells, supporting the emerging role for this protein modification in the regulation of histone modifications and DNA methylation. Stem Cells 2014

Comparison of activity levels measured by a wrist worn accelerometer and direct observation in young children

Peer reviewedPublisher PD

Gabriella Berki, Free Movement of Patients in the EU-A Patient’s Perspective

The right of EU citizens to receive health care in other Member States, paid by their home country, is a valuable benefit, capable of greatly improving the quality of life of those who use it, but involving legal complexity, cumbersome processes, and inequalities. Gabriella Berki’s book, which originated as a doctoral thesis, examines these flaws with the aim of identifying how ‘European cross-border patient mobility legislation can be improved in a way that better serves patients’ interests while respecting the responsibilities of the Member States in this field’ (p x). Dr Berki is now an Assistant Professor and lecturer at universities in Hungary, France, and Croatia, so she brings a useful pan-European..