During the stress testing session, cortisol responses to two behavioral this website tasks were assessed. The associations of dispositional optimism with cortisol and subjective appraisal were assessed using hierarchical multiple
regression analysis. Results: The cortisol awakening response, but not the diurnal profile, was negatively associated with optimism independently of age, sex, employment grade, body mass index, smoking status, depressive symptoms, and time of awakening (beta = -0.12, p <= .05). No associations were observed between optimism and stress-induced cortisol changes in the laboratory; however, perceived stress was lower (beta = -0.18, p <= .001), and perception of control was higher (beta = 0.18, p <= .001), in more optimistic participants during the psychophysiological testing session. Conclusions: Dispositional optimism may confer benefits to the individual through attenuated hypothalamic-pituitary-adrenal TGF-beta/Smad inhibitor axis response to waking in everyday life. However, no evidence emerged for an association between optimism and cortisol laboratory stress responses, which suggests that other compensatory mechanisms might
play a role.”
“The t(10;11)(p12;q23) translocation and the t(10;11)(p12;q14) translocation, which encode the MLL (mixed lineage leukemia)-AF10 and CALM (clathrin assembly lymphoid myeloid leukemia)-AF10 fusion oncoproteins, respectively, are two recurrent chromosomal rearrangements
observed in patients with acute myeloid leukemia and acute PF477736 mouse lymphoblastic leukemia. Here, we demonstrate that MLL-AF10 and CALM-AF10-mediated transformation is dependent on the H3K79 methyltransferase Dot1l using genetic and pharmacological approaches in mouse models. Targeted disruption of Dot1l using a conditional knockout mouse model abolished in vitro transformation of murine bone marrow cells and in vivo initiation and maintenance of MLL-AF10 or CALM-AF10 leukemia. The treatment of MLL-AF10 and CALM-AF10 transformed cells with EPZ004777, a specific small-molecule inhibitor of Dot1l, suppressed expression of leukemogenic genes such as Hoxa cluster genes and Meis1, and selectively impaired proliferation of MLL-AF10 and CALM-AF10 transformed cells. Pretreatment with EPZ004777 profoundly decreased the in vivo spleen-colony-forming ability of MLL-AF10 or CALM-AF10 transformed bone marrow cells. These results show that patients with leukemia-bearing chromosomal translocations that involve the AF10 gene may benefit from small-molecule therapeutics that inhibit H3K79 methylation. Leukemia (2013) 27, 813-822;doi:10.1038/leu.2012.327″
“Objective: Psychological stress and sleep disturbances are highly prevalent and are both implicated in the etiology of cardiovascular diseases.
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