Psychological challenges, including traumatic events, have been hypothesized to increase the age-related pace of biological aging. Here we test the hypothesis that psychological challenges can affect the pace of telomere attrition, a marker of cellular aging, using data from an ongoing longitudinal-cohort study of Kaqchikel Mayan women living in a population with a high frequency of child morta...

objective: helicobacter pylori is a widely distributed gram negative bacterium that infects the human stomach and duodenum. some antibiotic regimens are subjected to cure the infection but the cost of drugs, poor patient compliance and emerging of antibiotic-resistant strains are limiting the usefulness of these antibiotic therapies. therefore, interest in developing a h. pylori vaccine is grow...

The purposes of this study were to examine the effect of acute incremental exercise on the performance of a central executive task; the responses of the sympathoadrenal system (SAS) and hypothalamic-pituitary-adrenal axis (HPAA) during exercise, while simultaneously carrying out the central executive task; and the ability of Delta plasma concentrations of epinephrine, norepinephrine, adrenocort...

The title complex, [Nd(2)(C(8)H(7)O(3))(6)(C(10)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, contains two Nd atoms, six 4-hy-droxy-phenyl-acetate (hpaa) anions, two 4,4'-bipyridine mol-ecules (bipy) and two water mol-ecules; an additional water mol-ecule of solvation is also present in the crystal structure. Each of the Nd(III) ions is nine-coordinated by seven O atoms from four hpaa ligands, an N atom from ...

In the title dinuclear complex, [Ho(2)(C(8)H(7)O(3))(6)(C(10)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, each of the two independent Ho(III) ions is coordinated by eight O atoms from four 4-hy-droxy-phenyl-acetate (HPAA) ligands and a water mol-ecule, and one N atom from a 4,4'-bipyridine (bipy) ligand in a distorted tricapped trigonal-prismatic geometry. The HPAA ligands are coordinated in bis-chelate, bri...

BACKGROUND Early life stress, such as painful and stressful procedures during neonatal intensive care after preterm birth, can permanently affect physiological, hormonal and neurobiological systems. This may contribute to altered programming of the hypothalamic-pituitary-adrenal axis (HPAA) and provoke changes in HPAA function with long-term health impacts. Previous studies suggest a lower HPAA...

In sheep, parturition is initiated by increased fetal hypothalamic-pituitary-adrenal axis (HPAA) activity leading to PGE(2) and PGF(2alpha) production and a rise in the 17beta-estradiol-progesterone (E(2)/P(4)) ratio. Uteroplacental PG production can also increase fetal HPAA activity. Periconceptional maternal undernutrition accelerates fetal HPAA maturation resulting in preterm labor. We deter...

Kumarasamy, Vasumathy, Murray D. Mitchell, Frank H. Bloomfield, Mark H. Oliver, Melanie E Campbell, John R. G. Challis, and Jane E. Harding. Effects of periconceptional undernutrition on the initiation of parturition in sheep. Am J Physiol Regul Integr Comp Physiol 288: R67–R72, 2005. First published August 26, 2004; doi:10.1152/ajpregu.00357.2004.—In sheep, parturition is initiated by increase...

In the title dinuclear complex, [Dy(2)(C(8)H(7)O(3))(6)(C(10)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, the Dy(III) atoms are coordinated by eight O atoms from four 2-(4-hy-droxy-phen-yl)acetate (HPAA) ligands and a water mol-ecule, and one N atom from a 4,4'-bipyridine (bipy) ligand in a distorted tricapped trigonal prismatic geometry. Whereas four HPAA ligands coordinate to just two Dy(III) atoms, the re...

In the polymeric title complex, {[Ce(C(8)H(7)O(3))(3)(H(2)O)(2)]·2C(10)H(8)N(2)·H(2)O}(n), the Ce(III) ion is coordinated by ten O atoms from four 2-(4-hy-droxy-phen-yl)acetate (HPAA) ligands and two water mol-ecules. One HPAA ligand coordinates just to one Ce(III) ion, whereas the remaining two bridge two Ce(III) ions. The 4,4'-bipyridine mol-ecule and one water mol-ecule are not coordinated t...