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S100A4 protects mice from high-fat diet-induced obesity and inflammation
As a member from S100 calcium-binding protein family, S100A4 is ubiquitous and elevated in tumor progression and metastasis, but its role in regulating obesity has not been well characterized. In this study, we showed that S100A4 was mainly expressed by stromal cells in adipose tissue and the S100A4 level in adipose tissue was decreased after high-fat diet (HFD). S100A4 deficient mice exhibited aggravated symptoms of obesity and suppressed insulin signaling after 12 weeks of HFD. Aggravated obesity in S100A4 deficient mice were found to be positively correlated with higher inflammatory status of the liver. Then, we found that extracellular S100A4 or overexpressed S100A4 inhibited adipogenesis and decreased mRNA levels of inflammation gene in 3T3-L1 adipocytes in vitro; whereas small interfering RNA (siRNA)-mediated suppression of S100A4 displayed the opposite results. Additionally, the protective effect induced by S100A4 during HFD-induced obesity was tightly related with activation of Akt signaling in adipose tissues, as well as livers and muscles. Taken together, we demonstrate that S100A4 is an inhibitory factor for obesity and attenuates the inflammatory reaction, while activating the Akt signaling, which suggest that S100A4 is a potential candidate for the treatment of diet-induced obesity and its complications.
Response to 'Evolving M-protein pattern in patients with smoldering multiple myeloma: impact on early progression'
Response to 'Evolving M-protein pattern in patients with smoldering multiple myeloma: impact on early progression', Published online: 25 May 2018; doi:10.1038/s41375-018-0155- ... mehr
Coppery inks paint an underwater rainbow
Coppery inks paint an underwater rainbow, Published online: 25 May 2018; doi:10.1038/d41586-018-05282-y
Inexpensive version of luminescent pigment shrugs off water. mehr
Previous studies suggested that MeCP2 competes with linker histone H1, but this hypothesis has never been tested in vivo. Here, we performed chromatin immunoprecipitation followed by sequencing (ChIP-seq) of Flag-tagged-H1.0 in mouse forebrain excitatory neurons. Unexpectedly, Flag-H1.0 and ... mehr
(dpa) Vom visionären Quanten-Physiker über den Experten für Gen-Editing bis hin zum umstrittenen neuen Chef der US-Umweltbehörde EPA - sie alle gehören zu den zehn Menschen, die nach Ansicht des Fachmagazins «Nature» im Jahr 2017 eine entscheidende Rolle in der Wissenschaft gespielt haben. ... mehr
(dpa) Die laut «Nature» einflussreichsten Forscher des Jahres 2016 haben ein breites Themenspektrum. Ihre Arbeitsgebiete reichen von Gravitationswellen über Künstliche Intelligenz bis hin zu den Rechten von Minderheiten in der Wissenschaft. «Die Wissenschaftler auf der 2016 Nature-Zehnerlis ... mehr
(dpa) Ein Genetiker, der eine riesige Ethik-Debatte auslöst, eine Frau, die gegen sexuelle Belästigung an Unis kämpft und ein Atom-Experte, dem große Diplomatie gelingt: Sie zählen aus Sicht des britischen Wissenschaftsmagazins «Nature» zu den zehn bedeutenden Menschen 2015. Auch ein in Mai ... mehr