2005
DOI: 10.1210/en.2004-1004
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Influence of Ovarian Ornithine Decarboxylase in Folliculogenesis and Luteinization

Abstract: LH plays a relevant role in folliculogenesis, ovulation, and luteinization. Although ornithine decarboxylase (ODC), a key enzyme in polyamine biosynthesis, is a target of LH in the ovary, the functional significance of ODC induction has remained elusive. Our study reveals that the blockade of the induction of ovarian ODC by means of the specific inhibitor alpha-difluoromethylornithine (DFMO) affects folliculogenesis and luteinization. In immature female mice, DFMO was found to inhibit ovarian growth, the forma… Show more

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Cited by 38 publications
(30 citation statements)
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“…This level of ODC activity is at least 10 times that required for the preceding follicular phase, which is characterized by significant cell proliferation within the antral follicles (Kobayashi et al, 1971;Fozard et al, 1980b;Bastida et al, 2005), suggesting a function(s) unrelated to cell proliferation. Within the ovaries, LH stimulates the transitory rise of ODC proteins mainly in preovulatory follicles (Icekson et al, 1974), both in the somatic (theca and granulosa) cells and in the oocytes (Bastida et al, 2005). Complete inhibition of this transitory ODC/putrescine rise does not affect oocyte maturation or ovulation (Fozard et al, 1980b;Bastida et al, 2005).…”
Section: Introductionmentioning
confidence: 93%
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“…This level of ODC activity is at least 10 times that required for the preceding follicular phase, which is characterized by significant cell proliferation within the antral follicles (Kobayashi et al, 1971;Fozard et al, 1980b;Bastida et al, 2005), suggesting a function(s) unrelated to cell proliferation. Within the ovaries, LH stimulates the transitory rise of ODC proteins mainly in preovulatory follicles (Icekson et al, 1974), both in the somatic (theca and granulosa) cells and in the oocytes (Bastida et al, 2005). Complete inhibition of this transitory ODC/putrescine rise does not affect oocyte maturation or ovulation (Fozard et al, 1980b;Bastida et al, 2005).…”
Section: Introductionmentioning
confidence: 93%
“…On the other hand, the function of ODC during mammalian ovulation remains enigmatic (Lefevre et al, 2011). During estrous cycles in rats (Kobayashi et al, 1971) and mice (Bastida et al, 2005), ovarian ODC activity, and the corresponding ovarian putrescine concentration (Fozard et al, 1980b;Bastida et al, 2005) exhibit a LH-mediated transitory rise during the evening of proestrus, concurrent with oocyte maturation in vivo. This level of ODC activity is at least 10 times that required for the preceding follicular phase, which is characterized by significant cell proliferation within the antral follicles (Kobayashi et al, 1971;Fozard et al, 1980b;Bastida et al, 2005), suggesting a function(s) unrelated to cell proliferation.…”
Section: Introductionmentioning
confidence: 99%
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“…The homogenate was centrifuged at 12 000 g for 20 min, and DDC activity was determined in the supernatant by measuring 14 CO 2 release from 1-14 C DOPA, using a protocol similar to the one used for measuring ODC activity (Bastida et al 2005). In brief, the incubation mixture contained 20 mM Tris pH 7 .…”
Section: Measurement Of Ddc Activitymentioning
confidence: 99%
“…Although it has been known for many years that pituitary and gonadal hormones induce ODC in target tissues (2,24,59), the physiological function of ODC induction in response to these factors still remains largely unknown. In this respect, we (7,8) recently found that the induction of ovarian ODC mediated by luteinizing hormone is necessary for folliculogenesis and luteinization. These studies suggested that ODC induction may be relevant for the regulation of the steroidogenic activity in the mouse ovary.…”
mentioning
confidence: 97%