1998
DOI: 10.1002/(sici)1098-2795(199808)50:4<451::aid-mrd9>3.3.co;2-t
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Progesterone receptor in the reproductive system of the female of Octopus vulgaris: Characterization and immunolocalization

Abstract: In this study for the first time we have characterized a progesterone receptor in the reproductive system of the female of Octopus vulgaris. Scatchard analysis revealed that one binding component with high affinity and low capacity for the ligand was present only in the nuclear extract. Competition experiments showed that the progesterone receptor was strictly specific for progesterone. DNA-cellulose binding and DEAE-Sephacel both confirmed the presence of one 3H-progesterone binding component which eluted at … Show more

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Cited by 15 publications
(21 citation statements)
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“…Similar to our finding, PR with molecular weight of 70 kDa was identified by Western blotting in O. vulgaris and A. pallipes (Di Cosmo et al 1998. All of the above data suggest that the occurrence of PR in invertebrates is well-conserved.…”
Section: Discussionsupporting
confidence: 90%
See 1 more Smart Citation
“…Similar to our finding, PR with molecular weight of 70 kDa was identified by Western blotting in O. vulgaris and A. pallipes (Di Cosmo et al 1998. All of the above data suggest that the occurrence of PR in invertebrates is well-conserved.…”
Section: Discussionsupporting
confidence: 90%
“…For example, in Octopus vulgaris, PR immunoreactivity was observed in the nuclei of the follicle cells in the ovary of the proximal portion of the oviduct and of the outer region of the nidamental gland (Di Cosmo et al 1998). In Austropotamobius pallipes (crayfish), PR has also been identified in the ovary and hepatopancreas .…”
Section: Discussionmentioning
confidence: 99%
“…For invertebrates an equally complex system has not been proven yet. However, the recent discovery of estrogen receptors in invertebrate taxa, both in the deuterostome and protostome clades (de Waal et al, 1982;di Cosmo et al, 2002) indicates that steroid-binding proteins and, therefore, mechanisms associated with the signal transduction process are phylogenetically very old (Thornton et al, 2003). Therefore in the present study, hsp90 was selected as a potential biomarker, particular in view to possible uncoupling effects.…”
Section: Introductionmentioning
confidence: 99%
“…PRG receptor immunoreactive elements were identified in the reproductive system of the female Octopus vulgaris [90]. According to Tosti, the PRG receptors are physiologically active because the external application of PRG stimulates the activation of spermatozoa in Octopus [91].…”
Section: Sex Steroid-like Receptors In Molluscsmentioning
confidence: 99%