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Determinants of P3 amplitude and response to alcohol in Native American Mission Indians

Academic Article
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Overview

authors

  • Ehlers, Cindy
  • Garcia-Andrade, C.
  • Wall, Tamara L.
  • Sobel, D. F.
  • Phillips, E.

publication date

  • April 1998

journal

  • Neuropsychopharmacology  Journal

abstract

  • To examine more closely the anti-oestrogenic action of progesterone (P), its effect on various parameters in the 17 beta-oestradiol (E2)-primed uterus of the mouse, guinea pig, rabbit and ewe was studied. Changes in uterine wet weight, rate of in vitro protein synthesis, protein : DNA and RNA : DNA ratios, peroxidase activity and the level of cytosol receptors for E2 and P were measured. Considerable between-species differences in the effect of P on these parameters were observed. The anti-uterotrophic action was greater in the mouse than in the guinea pig and was not seen in the rabbit or ewe. P inhibited protein synthesis in the mouse, was without significant effect in the guinea pig and was mildly stimulatory in the rabbit and ewe. Inhibitory effects on protein : DNA and RNA : DNA ratios were substantial in the mouse, minor in the guinea pig and absent in the rabbit and ewe. Peroxidase activity was decrease in the mouse and guinea pig, essentially lacking in the rabbit and not detectable in the ewe. In all species the level of both oestrogen and progesterone cytosol receptors was decreased, although the effect on the E2 receptor was less marked in the ewe. The results indicate that in the species studied an effect of P on the replenishment of the E2 receptor is not necessarily associated with other anti-oestrogenic actions of P and argue against the concept that initial anti-oestrogenic actions of P are mediated via a specific effect on such replenishment.

subject areas

  • Animals
  • Castration
  • Cytosol
  • DNA
  • Estradiol
  • Female
  • Guinea Pigs
  • Male
  • Mice
  • Organ Size
  • Peroxidases
  • Progesterone
  • Protein Biosynthesis
  • RNA
  • Rats
  • Receptors, Estrogen
  • Receptors, Progesterone
  • Sheep
  • Uterus
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Research

keywords

  • ERPs
  • Native Americans
  • P3
  • alcohol dependence
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Identity

International Standard Serial Number (ISSN)

  • 0893-133X

PubMed ID

  • 95094
  • 9509496
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Additional Document Info

start page

  • 282

end page

  • 292

volume

  • 18

issue

  • 4

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