SELEX and SHAPE reveal that sequence motifs and an extended hairpin in the 5' portion of Turnip crinkle virus satellite RNA C mediate fitness in plants.

Noncoding RNAs use their sequence and/or structure to mediate function(s). The 5' portion (166 nt) of the 356-nt noncoding satellite RNA C (satC) of Turnip crinkle virus (TCV) was previously modeled to contain a central region with two stem-loops (H6 and H7) and a large connecting hairpin (H2). We now report that in vivo functional selection (SELEX) experiments assessing sequence/structure requirements in H2, H6, and H7 reveal that H6 loop sequence motifs were recovered at nonrandom rates and only some residues are proposed to base-pair with accessible complementary sequences within the 5' central region.

Interleukin-6 (IL-6) expression and natural killer (NK) cell dysfunction and anergy in heart failure.

Immune dysfunction has been postulated to play a role in the pathophysiology of chronic heart failure. We examined the relation between interleukin-6 (IL-6) production and natural killer (NK) cell dysfunction in patients with chronic heart failure. Sera and peripheral blood mononuclear cells (PBMCs) were collected from 82 patients with advanced heart failure.

Beta blocker and angiotensin-converting enzyme inhibitor therapy is associated with decreased Th1/Th2 cytokine ratios and inflammatory cytokine production in patients with chronic heart failure.

Objective: To examine the potential impact of beta-blockers and angiotensin-converting enzyme (ACE) inhibitors, medications which modulate beta-adrenergic signaling, on immune function in patients with chronic heart failure (HF).

Methods: 118 patients attending an HF center were tested for circulating levels of norepinephrine (NE), T cells and the inflammation-associated cytokine interleukin 6 (IL-6). Levels of the cytokines interferon-gamma (IFNgamma), IL-10, and tumor necrosis factor-alpha (TNFalpha) produced by cultured peripheral blood mononuclear cells (PBMC) were measured in culture supernatants following T cell stimulation in vitro.

Acute dissociative responses in law enforcement officers involved in critical shooting incidents: the clinical and forensic implications.

The authors examine the prevalence of acute traumatic dissociative responses in a group of 115 law enforcement officers involved in critical incidents. Law enforcement officers were retrospectively surveyed for the presence of dissociative symptoms at the time of the critical incident, as well as for the presence of acute stress symptoms and posttraumatic stress symptoms. Results show that 90% of the officers reported experiencing a dissociative response during the critical incident.

Estimates of nursing infant daily dose of fluoxetine through breast milk.

Background: This study compared three methods of estimating the daily dose of fluoxetine to nursing infants and the relationship between these estimates and infant serum concentrations.

Methods: Breast milk and infant serum concentrations of fluoxetine and norfluoxetine were obtained from 10 nursing mother-infant pairs. Quantification of daily infant dose was determined by three methods: 1) collection of the total volume of breast milk over 24 hours and determination of the average breast milk concentration (Baby's Total Daily Dose); 2) determination of the maximum and minimum breast milk concentrations during 24 hours and an estimated milk consumption of 150 mL/kg/day (Atkinson Model); and 3) determination of the gradient of excretion of medication into breast milk at a specified time after the maternal dose, applying this gradient to each nursing collection and summing the values for 24 hours (Mathematical Model).