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Hypoxia in the primary tumour microenvironment leads to upregulation of a dormancy signature in the tumour cells that persists after their dissemination to distant sites, permitting them to evade therapy.p120
Spectacular images of the process of myosin II filament formation and organization in migrating cells are unveiled by super-resolution imaging. A combination of short- and long-range interactions with actin filaments is seen to play a critical role in filament partitioning and alignment into contractile actin arcs and stress fibres.
Under misfolded protein stress, the endoplasmic reticulum (ER) activates the unfolded protein response (UPR) to restore homeostasis, or commits the cell to apoptosis. A study now uncovers how the UPR is governed by the circadian clock to adjust ER protein-folding capacity to metabolic demand and protect against liver damage.
Long noncoding RNAs (lncRNAs) are increasingly recognized for their role in cancer progression. The previously uncharacterized lncRNA MAYA is now shown to promote bone metastasis by bridging ROR1–HER3 and Hippo–YAP pathways. Neuregulin-induced HER3 phosphorylation by ROR1 recruits a MAYA-containing protein complex to methylate Hippo/MST1 and activate YAP target genes that are essential for bone metastasis.
Using structured illumination microscopy, Beach et al. and Hu et al. visualize the assembly of myosin II filaments in cells, describing a filament-partitioning mechanism, and long-range self-organization of filaments, respectively.
Maillo et al. show that in hepatocytes ER stress upregulates CPEB4 through the UPR and circadian clock, leading to CPEB4-mediated translation for mitochondrial and ER homeostasis. CPEB4 loss leads to ageing- and high fat diet-induced liver steatosis.
Li et al. show that ROR1–HER3 receptor tyrosine kinase signalling in breast cancer cells inhibits the MST1/2 Hippo pathway kinases through a lncRNA termed MAYA. The resulting activation of YAP promotes osteoclast differentiation for bone metastasis.
Aguirre-Ghiso and colleagues report that hypoxia in the primary tumour microenvironment leads to upregulation of a dormancy signature in the tumour cells that persists after their dissemination to distant sites, permitting them to evade therapy.
Using structured illumination microscopy, Beach et al. and Hu et al. visualize the assembly of myosin II filaments in cells, describing a filament-partitioning mechanism, and long-range self-organization of filaments, respectively.
