Pharmacokinetics of Oral and Intravenous Paracetamol (Acetaminophen) When Co-Administered with Intravenous Morphine in Healthy Adult Subjects.

Background And Objective: Several features favor paracetamol (acetaminophen) administration by the intravenous rather than the oral route in the postoperative setting. This study compared the pharmacokinetics and bioavailability of oral and intravenous paracetamol when given with or without an opioid, morphine.

Methods: In this randomized, single-blind, parallel, repeat-dose study in healthy adults, subjects received four repeat doses of oral or intravenous 1000 mg paracetamol at 6-h intervals, and morphine infusions (0.

Ropivacaine and Bupivacaine prevent increased pain sensitivity without altering neuroimmune activation following repeated social defeat stress.

Objective: Mounting evidence indicates that stress influences the experience of pain. Exposure to psychosocial stress disrupts bi-directional communication pathways between the central nervous system and peripheral immune system, and can exacerbate the frequency and severity of pain experienced by stressed subjects. Repeated social defeat (RSD) is a murine model of psychosocial stress that recapitulates the immune and behavioral responses to stress observed in humans, including activation of stress-reactive neurocircuitry and increased pro-inflammatory cytokine production.

Effect of inhaled nitric oxide on oxygen therapy, mechanical ventilation, and hypoxic respiratory failure.

To assess the role of inhaled nitric oxide (iNO) in reducing the need for oxygen therapy, decreasing time on mechanical ventilatory support, and attenuating probability of hypoxic respiratory failure severity progression, we reviewed published reports of phase III iNO studies in neonates with hypoxic respiratory failure and pulmonary hypertension, as well as a novel post-hoc analysis of data from the Clinical Inhaled Nitric Oxide Research Group Initiative (CINRGI) study population not been previously reported. The post-hoc analysis of the CINRGI study showed that iNO shortens the duration of oxygen therapy versus placebo (17 vs. 34 days; P<0.

Sympathetic Release of Splenic Monocytes Promotes Recurring Anxiety Following Repeated Social Defeat.

Background: Neuroinflammatory signaling may contribute to the pathophysiology of chronic anxiety disorders. Previous work showed that repeated social defeat (RSD) in mice promoted stress-sensitization that was characterized by the recurrence of anxiety following subthreshold stress 24 days after RSD. Furthermore, splenectomy following RSD prevented the recurrence of anxiety in stress-sensitized mice.

Oxytocin mediates social neuroprotection after cerebral ischemia.

Background And Purpose: The reduced incidence, morbidity, and mortality of stroke among humans with strong social support have been well-documented; however, the mechanisms underlying these socially mediated phenomena remain unknown, but may involve oxytocin (OT), a hormone that modulates some aspects of social behavior in humans and other animals.

Methods: In the present study, adult male mice were socially isolated (housed individually) or socially paired (housed with an ovariectomized female); social pairing increased hypothalamic OT gene expression. To determine whether a causal relationship exists between increased OT and improved stroke outcome, mice were treated with exogenous OT or OT receptor antagonist beginning 1 week before induction of experimental stroke via middle cerebral artery occlusion.

Stress and social isolation increase vulnerability to stroke.

Stress is a universal experience for living organisms. Under many circumstances activation of the hypothalamic-pituitary adrenal (HPA) axis is an adaptive response to stress. However, when stress or HPA activation is prolonged or its timing immediately precedes or coincides with an ongoing neurodegenerative process, the results can be deleterious.