Abstract:
:In multinucleated heterokaryons formed from the fusion of differentiated muscle cells to either hepatocytes or fibroblasts, muscle-specific gene expression is activated, liver-specific gene expression is repressed, and there are changes in the location of the Golgi apparatus. An understanding of the regulatory mechanisms that underlie this plasticity is of particular interest given the stability of the differentiated state in vivo. We have now investigated whether MyoD or myogenin, regulators of muscle-specific gene expression that have a helix-loop-helix motif, can induce the phenotypic conversion observed in heterokaryons. When these regulators were stably or transiently introduced into fibroblasts or hepatocytes by microinjection, transfection or retroviral infection with complementary DNA in expression vectors, fibroblasts expressed muscle-specific genes, whereas hepatocytes did not. However, fusion of hepatocytes stably expressing MyoD to fibroblasts resulted in activation in the heterokaryon of muscle-specific genes of both cell types. These results imply that other regulators, present in fibroblasts but not in hepatocytes, are necessary for the activation of muscle-specific genes, and indicate that the differentiated state of a cell is dictated by its history and a dynamic interaction among the proteins that it contains.
journal_name
Naturejournal_title
Natureauthors
Schäfer BW,Blakely BT,Darlington GJ,Blau HMdoi
10.1038/344454a0subject
Has Abstractpub_date
1990-03-29 00:00:00pages
454-8issue
6265eissn
0028-0836issn
1476-4687journal_volume
344pub_type
杂志文章相关文献
NATURE文献大全abstract::Most patients with cancer either do not respond to immune checkpoint blockade or develop resistance to it, often because of acquired mutations that impair antigen presentation. Here we show that loss of function of the RNA-editing enzyme ADAR1 in tumour cells profoundly sensitizes tumours to immunotherapy and overcome...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-018-0768-9
更新日期:2019-01-01 00:00:00
abstract::Quantum information science involves the storage, manipulation and communication of information encoded in quantum systems, where the phenomena of superposition and entanglement can provide enhancements over what is possible classically. Large-scale quantum information processors require stable and addressable quantum...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature06118
更新日期:2007-09-06 00:00:00
abstract::Owing to their scientific and technological importance, inorganic single crystals with highly reactive surfaces have long been studied. Unfortunately, surfaces with high reactivity usually diminish rapidly during the crystal growth process as a result of the minimization of surface energy. A typical example is titaniu...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature06964
更新日期:2008-05-29 00:00:00
abstract::Cell and lipid membranes are able to bend, as manifested during membrane fusion and the formation of non-lamellar lyotropic mesophases in water. But there is an energy cost to bending of lipid layers, called the curvature elastic energy. Although the functional form of this energy is known, a complete quantitative kno...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/368224a0
更新日期:1994-03-17 00:00:00
abstract::Assembly of multi-component supramolecular machines is fundamental to biology, yet in most cases, assembly pathways and their control are poorly understood. An example is the type III secretion machine, which mediates the transfer of bacterial virulence proteins into host cells. A central component of this nanomachine...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature04822
更新日期:2006-06-01 00:00:00
abstract::The amino-terminal region of the common corticotropin/beta-lipotrophin (beta-LPH) precursor has been identified in the AtT-20 mouse tumor cells as a glycopeptide with an apparent molecular weight of 16,000 (the '16K fragment'). A third melanotropin core sequence or gamma-MSH similar to that found in ACTH and beta-LPH ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/291156a0
更新日期:1981-05-14 00:00:00
abstract::Life implies movement. Most forms of movement in the living world are powered by tiny protein machines known as molecular motors. Among the best known are motors that use sophisticated intramolecular amplification mechanisms to take nanometre steps along protein tracks in the cytoplasm. These motors transport a wide v...
journal_title:Nature
pub_type: 杂志文章,评审
doi:10.1038/nature01601
更新日期:2003-04-17 00:00:00
abstract::Acute stress suppresses pain by activating brain pathways that engage opioid or non-opioid mechanisms. Here we show that an opioid-independent form of this phenomenon, termed stress-induced analgesia, is mediated by the release of endogenous marijuana-like (cannabinoid) compounds in the brain. Blockade of cannabinoid ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature03658
更新日期:2005-06-23 00:00:00
abstract::The existence of prostate stem cells (PSCs) was first postulated from the observation that normal prostate regeneration can occur after repeated cycles of androgen deprivation and replacement in rodents. Given the critical role of PSCs in maintaining prostate tissue integrity and their potential involvement in prostat...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature07427
更新日期:2008-12-11 00:00:00
abstract::One of us has previously reported that treatment of the Keilin and Hartree heart-muscle preparation with 2,3-dimercaptopropanol (BAL), in the presence of air, leads to the complete inactivation of the succinate oxidase system with little if any effect on the activities of succinate dehydrogenase (until more than half ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/288717a0
更新日期:1980-12-25 00:00:00
abstract::In Drosophila, a large group of structural genes exhibit coordinate regulation, not because they function in a common developmental pathway but because they happen to reside on the X chromosome. These genes are subjected to the regulatory mechanism of dosage compensation which insures that their phenotypic products ar...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/285573a0
更新日期:1980-06-19 00:00:00
abstract::Malignancy is a common and dreaded complication following organ transplantation. The high incidence of neoplasm and its aggressive progression, which are associated with immunosuppressive therapy, are thought to be due to the resulting impairment of the organ recipient's immune-surveillance system. Here we report a me...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/17401
更新日期:1999-02-11 00:00:00
abstract::Methyl chloride is the largest natural source of ozone-depleting chlorine compounds, and accounts for about 15 per cent of the present atmospheric chlorine content. This contribution was likely to have been relatively greater in pre-industrial times, when additional anthropogenic sources-such as chlorofluorocarbons-we...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/416163a
更新日期:2002-03-14 00:00:00
abstract::ELLIPTICAL galaxies acting as gravitational lenses occasionally produce spectacular images-Einstein rings-of distant objects. Giant arcs(1) and radio rings(2) have been observed. A wide variety of image morphologies is possible, the generation of which is qualitatively understood in terms of large magnifications at ca...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/344043a0
更新日期:1990-03-01 00:00:00
abstract::Comparative mapping, which compares the location of homologous genes in different species, is a powerful tool for studying genome evolution. Comparative maps suggest that rates of chromosomal change in mammals can vary from one to ten rearrangements per million years. On the basis of these rates we would expect 84 to ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/46555
更新日期:1999-11-25 00:00:00
abstract::Galactic cosmic rays (CRs) are widely believed to be accelerated by shock waves associated with the expansion of supernova ejecta into the interstellar medium. A key issue in this long-standing conjecture is a theoretical prediction that the interstellar magnetic field can be substantially amplified at the shock of a ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature06210
更新日期:2007-10-04 00:00:00
abstract::The evolution of self-fertilization in hermaphrodites is opposed by costs that decrease the value of self progeny relative to that of outcross progeny. However, self-fertilization is common in plants; 20% are highly selfing and 33% are intermediate between selfing and outcrossing. Darwin proposed an adaptive benefit o...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature02776
更新日期:2004-08-19 00:00:00
abstract::Polycomb group proteins have an essential role in the epigenetic maintenance of repressive chromatin states. The gene-silencing activity of the Polycomb repressive complex 2 (PRC2) depends on its ability to trimethylate lysine 27 of histone H3 (H3K27) by the catalytic SET domain of the EZH2 subunit, and at least two o...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature08398
更新日期:2009-10-08 00:00:00
abstract::Men who develop metastatic castration-resistant prostate cancer (CRPC) invariably succumb to the disease. Progression to CRPC after androgen ablation therapy is predominantly driven by deregulated androgen receptor (AR) signalling. Despite the success of recently approved therapies targeting AR signalling, such as abi...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature13229
更新日期:2014-06-12 00:00:00
abstract::Arid ecosystems, which occupy about 20% of the earth's terrestrial surface area, have been predicted to be one of the most responsive ecosystem types to elevated atmospheric CO2 and associated global climate change. Here we show, using free-air CO2 enrichment (FACE) technology in an intact Mojave Desert ecosystem, tha...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35040544
更新日期:2000-11-02 00:00:00
abstract::The perception of yellow has played a central role in distinguishing two main theories of colour vision. Hering proposed that yellow results from the activation of a distinct retinal-neural mechanism, whereas according to the Young-Helmholtz-Maxwell view, yellow results from the combined activation of red and green co...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/386066a0
更新日期:1997-03-06 00:00:00
abstract::The protein TFIIB is a general transcription initiation factor that interacts with a promoter complex (D.DNA) containing the TATA-binding subunit (TFIID tau, or TBP) of TFIID to facilitate subsequent interaction with RNA polymerase II (ref. 2) through the associated TFIIF (ref. 3). The potential bridging function of T...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/363744a0
更新日期:1993-06-24 00:00:00
abstract::Type Ia supernovae have been used empirically as 'standard candles' to demonstrate the acceleration of the expansion of the Universe even though fundamental details, such as the nature of their progenitor systems and how the stars explode, remain a mystery. There is consensus that a white dwarf star explodes after acc...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature10644
更新日期:2011-12-14 00:00:00
abstract::Calcium-triggered fusion of synaptic vesicles and neurotransmitter release are fundamental signalling steps in the central nervous system. It is generally assumed that fast transmitter release is triggered by elevations in intracellular calcium concentration ([Ca2+]i) to at least 100 microM near the sites of vesicle f...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35022702
更新日期:2000-08-24 00:00:00
abstract::Hydrophobic signal-sequences direct the transfer of secretory proteins across the inner membrane of prokaryotes and the endoplasmic reticulum membranes of eukaryotes. In mammalian cells, signal-sequences are recognized by the 54K protein (M(r) 54,000) of the signal recognition particle (SRP) which is believed to hold ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/359741a0
更新日期:1992-10-22 00:00:00
abstract::Pairs of asteroids sharing similar heliocentric orbits, but not bound together, were found recently. Backward integrations of their orbits indicated that they separated gently with low relative velocities, but did not provide additional insight into their formation mechanism. A previously hypothesized rotational fissi...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature09315
更新日期:2010-08-26 00:00:00
abstract::The NMDA (N-methyl-D-aspartate) receptor transduces the binding of glutamate and glycine, coupling it to the opening of a calcium-permeable ion channel 1 . Owing to the lack of high-resolution structural studies of the NMDA receptor, the mechanism by which ion-channel blockers occlude ion permeation is not well unders...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-018-0039-9
更新日期:2018-04-01 00:00:00
abstract::Colorectal cancer (CRC) is a heterogeneous disease of the intestinal epithelium that is characterized by the accumulation of mutations and a dysregulated immune response. Up to 90% of disease risk is thought to be due to environmental factors such as diet, which is consistent with a growing body of literature that des...
journal_title:Nature
pub_type: 杂志文章,评审
doi:10.1038/s41586-020-2729-3
更新日期:2020-09-01 00:00:00
abstract::Intracellular signalling following mitogenic stimulation of quiescent cells involves the initiation of a phosphorylation cascade that leads to the rapid and reversible activation of the mitogen-activated protein (MAP) kinases ERK1 and ERK2. MAP kinase activation is mediated by dual phosphorylation within the motif Thr...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/367651a0
更新日期:1994-02-17 00:00:00
abstract::The separation of cells into populations that do not intermix, termed compartments, is a fundamental organizing principle during development. Dorsal-ventral compartmentalization of the Drosophila wing is regulated downstream of the apterous (ap) gene, which encodes a transcription factor that specifies dorsal wing fat...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/46786
更新日期:1999-09-30 00:00:00