20 results found
    1. Computational and Systems Biology
    2. Microbiology and Infectious Disease

    Inter-species population dynamics enhance microbial horizontal gene transfer and spread of antibiotic resistance

    Robert M Cooper et al.
    Killing their neighbors allows bacteria to steal genes, including antibiotic resistance genes, which we observed under a microscope, quantified, modeled, and predicted potentially guiding strategies to combat it.
    1. Neuroscience

    Selective and regulated trapping of nicotinic receptor weak base ligands and relevance to smoking cessation

    Anitha P Govind et al.
    The smoking cessation drug varenicline (Chantix) and other weak base ligands reduce a4b2-type nicotinic receptor (a4b2R) upregulation through slow intracellular release due to selective trapping in acidic vesicles that contain a4b2Rs.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Reverse evolution leads to genotypic incompatibility despite functional and active site convergence

    Miriam Kaltenbach et al.
    Enzyme evolution is reversible on a structural and functional (phenotypic) level, but through a different mutational pathway that leads to genotypic incompatibility with the ancestor.
    1. Structural Biology and Molecular Biophysics
    2. Evolutionary Biology

    An atomic-resolution view of neofunctionalization in the evolution of apicomplexan lactate dehydrogenases

    Jeffrey I Boucher et al.
    The convergent evolution of unusually strict substrate specificity in apicomplexan LDHs arose by classic neofunctionalization of a duplicated MDH gene via few mutations of large effect.
    1. Biochemistry and Chemical Biology
    2. Neuroscience

    Organic electrochemical transistor arrays for real-time mapping of evoked neurotransmitter release in vivo

    Kai Xie et al.
    An implantable device based on organic electrochemical transistors is developed for quantitative mapping of neurotransmitter release across multiple brain regions, revealing a cross-talk between the mesolimbic and nigrostriatal dopaminergic pathways.
    1. Cell Biology
    2. Cancer Biology

    Tumor microenvironment derived exosomes pleiotropically modulate cancer cell metabolism

    Hongyun Zhao et al.
    Exosomes from cancer-associated fibroblasts enhance the "Warburg effect" in tumors and contain de novo metabolites that can contribute to the entire compendia of central carbon metabolism within cancer cells.
    1. Genetics and Genomics
    2. Evolutionary Biology

    Oral transfer of chemical cues, growth proteins and hormones in social insects

    Adria C LeBoeuf et al.
    The socially exchanged fluid passed mouth-to-mouth during trophallaxis contains molecules that can influence development, potentially mediating communal control of colony phenotypes.
    1. Neuroscience

    MCTP is an ER-resident calcium sensor that stabilizes synaptic transmission and homeostatic plasticity

    Özgür Genç et al.
    MCTP is a novel presynaptic calcium sensor, resident within the endoplasmic reticulum, that is required for normal baseline neurotransmission, short-term synaptic plasticity and presynaptic homeostatic plasticity.
    1. Chromosomes and Gene Expression
    2. Microbiology and Infectious Disease

    sRNA-mediated activation of gene expression by inhibition of 5'-3’ exonucleolytic mRNA degradation

    Sylvain Durand et al.
    Small regulatory RNAs are able to modulate mRNA degradation rates by controlling access to the 5' end of mRNAs in bacteria.
    1. Cell Biology
    2. Developmental Biology

    Nutrient restriction enhances the proliferative potential of cells lacking the tumor suppressor PTEN in mitotic tissues

    Katarzyna Nowak et al.
    Nutrient limitation elicits differential responses in cells lacking the tumor suppressor PTEN and in normal cells, resulting in hyperplastic overgrowth of PTEN mutant tissue independent of additional mutations.

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