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1.
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2.
  • Landén, Mikael, 1966-, et al. (författare)
  • Heart rate variability in premenstrual dysphoric disorder.
  • 2004
  • Ingår i: Psychoneuroendocrinology. - 0306-4530. ; 29:6, s. 733-40
  • Tidskriftsartikel (refereegranskat)abstract
    • Measuring heart rate variability (HRV) is a way to assess the autonomic regulation of the heart. Decreased HRV, indicating reduced parasympathetic tone, has previously been found in depression and anxiety disorders. The objective of this study was to assess HRV in women with premenstrual dysphoric disorder (PMDD). To this end, time domain variables and frequency domain variables were assessed in 28 women with PMDD and in 11 symptom-free controls during both the symptomatic luteal phase and the non-symptomatic follicular phase of the menstrual cycle. Two variables reflecting vagal activity in the time domain, the root mean square of differences of successive normal RR intervals (rMSSD) and standard deviation of normal RR intervals (SDNN) were lower in PMDD patients, but this difference was statistically significant in the follicular phase only. The most important vagal measure in the frequency domain, supine high frequency (HF), also appeared lower in PMDD subjects during the follicular phase. It is suggested that PMDD may be associated with reduced vagal tone compared to controls and that this difference is most apparent in the non-symptomatic follicular phase of the menstrual cycle.
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3.
  • Melke, Jonas, 1971-, et al. (författare)
  • Serotonin transporter gene polymorphisms and platelet [3H] paroxetine binding in premenstrual dysphoria.
  • 2003
  • Ingår i: Psychoneuroendocrinology. - 0306-4530. ; 28:3, s. 446-58
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of this study was to investigate if women with premenstrual dysphoria differ from controls with respect to the number of platelet serotonin transporters, and with respect to three polymorphisms in the gene coding for the serotonin transporter: a 44 base pair insertion/deletion in the promoter region, a variable number of tandem repeats in the second intron, and a single nucleotide polymorphism in the 3' untranslated region. Also, the possible relationship between the three polymorphisms and platelet serotonin transporter density was analyzed. The density of platelet [(3)H]paroxetine binding sites was significantly lower in women with premenstrual dysphoria than in controls, but patients and controls did not differ with respect to allele or genotype frequency for any of the three polymorphisms examined. A significant association between the number of platelet serotonin transporters and the promoter polymorphism was observed, subjects being homozygous for the short (deletion) variant having higher platelet serotonin transporter density than subjects carrying the long (insertion) allele. The results support the assumption that serotonin-related psychiatric disorders-such as premenstrual dysphoria-may be associated with a reduction in platelet [(3)H]paroxetine binding, but argue against the notion that this reduction is due to certain variants of the serotonin transporter gene being more common in patients than in controls.
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7.
  • Olsson, Marie, 1971-, et al. (författare)
  • Intracerebroventricular administration of the angiotensin II receptor antagonist saralasin reduces respiratory rate and tidal volume variability in freely moving Wistar rats.
  • 2004
  • Ingår i: Psychoneuroendocrinology. - 0306-4530. ; 29:1, s. 107-12
  • Tidskriftsartikel (refereegranskat)abstract
    • The possible importance of intra-individual variations in respiratory rate and tidal volume has recently gained interest in psychiatric research, as a result of the observations that patients with panic disorder or premenstrual dysphoric disorder display enhanced respiratory variability as compared to controls. Although the role of brain neurotransmitters in the regulation of breathing has been extensively studied, as yet data on the central regulation of respiratory variability is sparse. Prompted by previous studies indicating that angiotensin II (ANG II) may influence ventilation as well as anxiety, we have studied the effect of intracerebroventricular administration of an ANG II receptor antagonist, saralasin, on respiratory variability in unrestrained, freely moving male Wistar rats. Treatment with saralasin, 5 mug dissolved in 1 mul saline followed by 9 mul saline in each lateral cerebral ventricle, did not influence tidal volume, but markedly reduced tidal volume variability (p=0.0005), as compared to saline injections (10 mul). Respiratory rate was reduced by saralasin (p=0.02), and there was also a non-significant tendency for a reduction in respiratory rate variability. Both minute volume (p=0.005) and volume/10 s variability (p=0.0006) were reduced. It is suggested that ANG II in the brain of Wistar rats may regulate respiratory rate and tidal volume variability.
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  • Anckarsater, Rolf, et al. (författare)
  • Association between thyroid hormone levels and monoaminergic neurotransmission during surgery.
  • 2007
  • Ingår i: Psychoneuroendocrinology. - 0306-4530. ; 32:8-10, s. 1138-43
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Human studies assessing thyroid hormone metabolism in relation to brain monoaminergic activity in vivo are scarce. The few studies that do exist suggest significant associations between thyroid function and monoaminergic activity, but the cause-and-effect relationships are far from elucidated. Methods: We simultaneously collected cerebrospinal fluid (CSF) and serum samples from 35 patients undergoing orthopaedic surgery before, 3 h after and the morning after interventions and performed analyses for thyroid hormones and monoamine metabolites. Results: At baseline, the CSF 3-methoxy-4-hydroxyphenylglycol concentrations were significantly correlated to the serum T-3/T-4 ratio (rho = 0.41, p = 0.017). During surgery, serum thyroid hormones and the T-3/T-4 ratio decreased (p < 0.0001), while the CSF T-3/T-4 ratio increased (p = 0.0009). There were no correlations between serum and CSF levels of T-3 and T-4 at any of the samplings. Strong correlations were noted between baseline CSF thyroid hormone concentrations and subsequent increases in CSF 5-hydroxyindoleacetic acid (5-HIAA), and homovanillinic acid (HVA), but not vice versa. Conclusions: Thyroid hormone levels in serum and CSF during stress seem to be distinctly regulated. Baseline thyroid hormone activity may facilitate changes in brain monoaminergic neurotransmission in response to stress.
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