Prolactin, Growth Hormone, and Luteinizing Hormone-β Subunit Gene Expression in the Cephalic and Caudal Lobes of the Anterior Pituitary Gland during Embryogenesis and Different Reproductive Stages in the Chicken

Kansaku, Norio; Shimada, Kiyoshi; Terada, Osamu; Sakai, Noboru

doi:10.1006/gcen.1994.1174

Cited by 58 publications

(43 citation statements)

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“…Since incubation behaviour is associated with aphagia and a 20-30% decrease in body weight (Zadworny et al, 1985(Zadworny et al, , 1988, it has been proposed by Hoshino and Wakita (1989) (fig 3). Similar results have been reported in the chicken (Kansaku et al, 1994). Therefore, factors other than, or in addition to, GH may be involved in the lipolytic process during incubation behaviour.…”

Section: Rna Dot Blot Analysissupporting

confidence: 88%

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Changes in expression of the prolactin and growth hormone gene during different reproductive stages in the pituitary gland of turkeys

Karatzas

Guemene²,

Zadwomy³

et al. 1997

Reprod. Nutr. Dev.

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Summary ― The changes in levels of prolactin (PRL) and growth hormone (GH) in plasma and the pituitary gland and their transcripts were measured in turkey hens at different physiological stages by radioimmunoassay and dot blot hybridization analysis, respectively. The levels of tPRL mRNA in the pituitary gland increased from those of the immature group to the egglaying group, reaching a maximum during the incubation and a minimum during the moulting stages. Changes in pituitary levels of PRL and PRL mRNA followed a similar trend and consequently were highly correlated (r 2 = 0.83), whereas a significant but lower correlation was observed between circulating and pituitary levels (r 2 = 0.62). Less significant changes were measured for tGH mRNA, with maximum and minimum levels measured in the pituitaries of egglaying and non-laying hens, respectively. These data suggest that although changes in con

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Section: Rna Dot Blot Analysissupporting

confidence: 88%

“…Conversely, it has been shown that both the pituitary content and synthetic rate of GH is significantly increased in incubating hens compared to laying hens. In addition, Kansaku et al (1994) noted that levels of GH mRNA also significantly increase in incubating chickens. Why pituitary content, but not release of GH during incubation, increases is not clear.…”

mentioning

confidence: 99%

Changes in expression of the prolactin and growth hormone gene during different reproductive stages in the pituitary gland of turkeys

Karatzas

Guemene²,

Zadwomy³

et al. 1997

Reprod. Nutr. Dev.

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“…Their spatial and temporal dynamics as observed in other vertebrate taxa point to physiologically variable actions [15,22]. However, the ontogeny of hormones of the GH-PRL group have been studied in only a limited number of fish.…”

Section: Discussionmentioning

confidence: 99%

“…A single histochemical study of development has been reported for a catfish, Clarias batrachus [5]. More recently the embryonic and larval appearance of GH, SL and PRL transcripts in lower vertebrates has been shown to trace the appearance of these peptides [14,22].…”

Section: Introductionmentioning

confidence: 99%

Immunohistochemically detected ontogeny of prolactin and growth hormone cells in the African catfish Clarias gariepinus

Volckaert

Mugoyo

Lescroart

et al. 1999

Comparative Biochemistry and Physiology Part B: Biochemistry an

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The chronological appearance of selected endocrine cells in the pituitary of African catfish Clarias gariepinus (Burchell, 1822) was studied morphologically, histologically and immunohistochemically by using antisera raised against catfish growth hormone (cgGH) and recombinant tilapia prolactin I (tPRL). cgGH-and tPRL-like immunoreactive cells were visible from day 1 post fertilisation (hatching) throughout the juvenile and the adult stage. From 1 to 90 days after hatching, the larval pituitary is oval in shape with a distinctly shaped rostral pars distalis, proximal pars distalis and pars intermedia. From day 120 onwards allometric growth of the rostral and proximal pars distalis extended the prolactin and growth hormone cells anteriorily and posteriorily, respectively. Size and activity of the prolactin and growth hormone cells, measured by the ratio of cell surface to nuclear surface remained constant until day 40 and showed a growth spurt thereafter. Growth hormone content, measured with a catfish-specific radio-immunoassay from hatching until 60 h post hatching, increased exponentially between 30 and 60 h.

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“…It has been demonstrated that GH significantly accelerates bovine oocyte maturation in vitro (Izadyar et al 1996). Significantly enhanced expression of GH and prolactin has been reported from chicken during embryogenesis (Kansaku et al 1994, Karatzas et al 1997. In catfish, however, prolactin was only modestly induced by injection of carp pituitary extract.…”

Section: Changes Of Transcriptinal Activities In the Catfish Pituitarmentioning

confidence: 99%

Transcriptional activities in the pituitaries of channel catfish before and after induced ovulation by injection of carp pituitary extract as revealed by expressed sequence tag analysis

Karsi

Li²,

Ra³

et al. 1998

Journal of Molecular Endocrinology

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Expressed sequence tag (EST) analysis was adopted to address physiological changes after injection of carp pituitary extract for induction of ovulation. ESTs were analyzed from cDNA libraries constructed from mRNA isolated from channel catfish (Ictalurus punctatus) pituitaries before and after induction of ovulation by injection of carp pituitary extract. One hundred randomly picked clones were analyzed. Of the sequences generated, a large percentage (59%) of ESTs were identified as known genes by identity comparisons. These 59 clones of known gene products represent transcriptional products of 30 genes. The 41 clones of unknown gene products represent 33 genes. Expression of gonadotropin (GtH) -subunit (149%) and prolactin (176%) was slightly enhanced as a result of induced ovulation. Large increases in frequencies of several peptide hormones were observed as a result of induced ovulation: GtH -I, 486%; GtH -II, 933%; growth hormone, 393%; proopiomelanocortin (POMC), 345%. POMC represented about 21% of all transcriptional activity in the pituitaries after induced ovulation. This is the first study addressing physiological changes after injection of carp pituitary extract, a procedure widely used in catfish hatcheries.

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Prolactin, Growth Hormone, and Luteinizing Hormone-β Subunit Gene Expression in the Cephalic and Caudal Lobes of the Anterior Pituitary Gland during Embryogenesis and Different Reproductive Stages in the Chicken

Cited by 58 publications

References 0 publications

Changes in expression of the prolactin and growth hormone gene during different reproductive stages in the pituitary gland of turkeys

Changes in expression of the prolactin and growth hormone gene during different reproductive stages in the pituitary gland of turkeys

Immunohistochemically detected ontogeny of prolactin and growth hormone cells in the African catfish Clarias gariepinus

Transcriptional activities in the pituitaries of channel catfish before and after induced ovulation by injection of carp pituitary extract as revealed by expressed sequence tag analysis

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