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  • Parental olfactory experience influences behavior and neural structure in subsequent generations. 24292232

    Using olfactory molecular specificity, we examined the inheritance of parental traumatic exposure, a phenomenon that has been frequently observed, but not understood. We subjected F0 mice to odor fear conditioning before conception and found that subsequently conceived F1 and F2 generations had an increased behavioral sensitivity to the F0-conditioned odor, but not to other odors. When an odor (acetophenone) that activates a known odorant receptor (Olfr151) was used to condition F0 mice, the behavioral sensitivity of the F1 and F2 generations to acetophenone was complemented by an enhanced neuroanatomical representation of the Olfr151 pathway. Bisulfite sequencing of sperm DNA from conditioned F0 males and F1 naive offspring revealed CpG hypomethylation in the Olfr151 gene. In addition, in vitro fertilization, F2 inheritance and cross-fostering revealed that these transgenerational effects are inherited via parental gametes. Our findings provide a framework for addressing how environmental information may be inherited transgenerationally at behavioral, neuroanatomical and epigenetic levels.
    Tipo de documento:
    Referencia
    Referencia del producto:
    Múltiplo
    Nombre del producto:
    Múltiplo

  • Water in Acetophenone

    Tipo de documento:
    Aplicación
    Referencia del producto:
    Múltiplo
    Nombre del producto:
    Múltiplo

  • A quorum-sensing signal promotes host tolerance training through HDAC1-mediated epigenetic reprogramming. 27694949

    The mechanisms by which pathogens evade elimination without affecting host fitness are not well understood. For the pathogen Pseudomonas aeruginosa, this evasion appears to be triggered by excretion of the quorum-sensing molecule 2-aminoacetophenone, which dampens host immune responses and modulates host metabolism, thereby enabling the bacteria to persist at a high burden level. Here, we examined how 2-aminoacetophenone trains host tissues to become tolerant to a high bacterial burden, without compromising host fitness. We found that 2-aminoacetophenone regulates histone deacetylase 1 expression and activity, resulting in hypo-acetylation of lysine 18 of histone H3 at pro-inflammatory cytokine loci. Specifically, 2-aminoacetophenone induced reprogramming of immune cells occurs via alterations in histone acetylation of immune cytokines in vivo and in vitro. This host epigenetic reprograming, which was maintained for up to 7 days, dampened host responses to subsequent exposure to 2-aminoacetophenone or other unrelated pathogen-associated molecules. The process was found to involve a distinct molecular mechanism of host chromatin regulation. Inhibition of histone deacetylase 1 prevented the immunomodulatory effects of 2-aminoacetophenone. These observations provide the first mechanistic example of a quorum-sensing molecule regulating a host epigenome to enable tolerance of infection. These insights have enormous potential for developing preventive treatments against bacterial infections.
    Tipo de documento:
    Referencia
    Referencia del producto:
    17-10085
    Nombre del producto:
    Magna ChIP™ A/G Chromatin Immunoprecipitation Kit
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