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Centre for Neuroendocrinology and Department of Anatomy, Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 913, Dunedin 9054, New Zealand
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Introduction When Geoffrey Harris wrote his influential monograph on ‘Neural Control of the Pituitary Gland’, it was already apparent that prolactin, or ‘lactogenic hormone’ as he referred to it, might be controlled differently to the other
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the physical expansion of the pituitary during pregnancy and lactation ( Gonzalez et al . 1988 , Elster et al . 1991 , Dinc et al . 1998 , Chanson et al . 2001 ). Several morphometric studies have identified the prolactin (PRL) cell population
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/adrenocorticotropic hormone- (Acth), somatotrophs/growth hormone- (Gh), prolactin- (Prl), thyroid-stimulating hormone-, luteinizing hormone-, follicle-stimulating hormone-secreting cells), the anterior lobe (AL) of the pituitary consists of Sox2 + (stem) cells and a meshwork
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-cell adaptive changes during gestation are not fully understood. It is well established that the lactogenic hormones, prolactin (Prl) and placental lactogen (PL), play an important role in driving β-cell proliferation and increasing glucose-stimulated insulin
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-out of the seasonal response is seen in the expression of a seasonal pituitary prolactin rhythm, which is activated by long photoperiods, driving moult cycles in birds and mammals ( Fig. 1 ). In small short-lived mammals such as Siberian hamsters, LD
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suckling does not take place, lactotroph mass returns to almost normal within 1–3 weeks, but remains slightly higher after pregnancy than in nulliparous rats, implying that pregnancy-induced changes in the size of the prolactin immunopositive population are
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αGSU will only be detected in thyrotropes and gonadotropes ( Ericson et al . 1998 , Himes & Raetzman 2009 , Kelberman et al . 2009 ). The expression of GH and Prolactin ( Prl ) by E15.5 is the hallmark of the differentiation of somatotrope and
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, expression levels of members of the prolactin family, prolactin family 2, subfamily c, member 3 ( Prl2c3: Plf ) and prolactin family 2, subfamily c, member 5 ( Prl2c5 ) were elevated only in SPA. On the other hand, microarray revealed that numerous adipocyte
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organ, secreting numerous hormonal signals, which influence maternal and foetal physiology ( Jansson 2016 ). The lactogenic hormones, prolactin and placental lactogen, are important pregnancy-associated signals, well-established to act via β
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very recent study demonstrated an important role of prolactin in the lactation-induced suppression of KP release and reproduction ( Brown et al . 2014 ). Figure 3 A possible mechanism of lactation-induced suppression of the reproductive axis. Metabolic