Fishy tales of prolactin-releasing peptide

Sakamoto, Tatsuya; Fujimoto, Masaaki; Ando, Masaaki

doi:10.1016/s0074-7696(05)25003-9

Cited by 43 publications

(33 citation statements)

References 169 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increased plasma levels of sodium/ osmolality and cortisol during terrestrial adaptation Fig. 2) have been known to suppress PRL expression in teleosts (Sakamoto et al 2003a). Under terrestrial conditions, the brain PrRP seems to importantly induce pituitary PRL.…”

Section: Discussionmentioning

confidence: 99%

“…Although there are contradictory data on PRL-releasing effects in rats, PrRP appears to be a potent hypothalamic secretagogue for PRL as well as an inducer of PRL transcription in teleost pituitaries (Sakamoto et al 2003a). On the other hand, both in fish and in mammals, PrRP appears to inhibit secretion of growth hormone (GH; Sakamoto et al 2003a), another member of the hormone family sharing a common ancestral gene with PRL (Rand-Weaver et al 1993). In mammals, PrRP is expressed in the central nervous system, but is also produced in the digestive tract, kidney, pancreas, adrenal gland, gonads and decidua (Fujii et al 1999).…”

Section: Introductionmentioning

confidence: 95%

“…PRL-releasing peptide (PrRP) is a peptide identified from mammalian hypothalamus with a specific PRLreleasing activity on pituitary cells (Hinuma et al 1998, Sakamoto et al 2003a. Concurrently, Fujimoto et al (1998) isolated a homologue of PrRP from the Japanese crucian carp, Carassius auratus langsdorfii.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, homologues have also been isolated from tilapia and chum salmon, showing these peptides to be identical to the carp peptide , Seale et al 2002. Although there are contradictory data on PRL-releasing effects in rats, PrRP appears to be a potent hypothalamic secretagogue for PRL as well as an inducer of PRL transcription in teleost pituitaries (Sakamoto et al 2003a). On the other hand, both in fish and in mammals, PrRP appears to inhibit secretion of growth hormone (GH; Sakamoto et al 2003a), another member of the hormone family sharing a common ancestral gene with PRL (Rand-Weaver et al 1993).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Expression of prolactin-releasing peptide and prolactin in the euryhaline mudskippers (Periophthalmus modestus): prolactin-releasing peptide as a primary regulator of prolactin

Sakamoto¹,

Amano²,

Hyodo³

et al. 2005

Journal of Molecular Endocrinology

View full text Add to dashboard Cite

Prolactin (PRL)-releasing peptide (PrRP) is a strong candidate stimulator of pituitary PRL transcription and secretion in teleosts. However, the role in control of extrapituitary PRL expression is unclear even in mammals. To study the possible presence of PrRP-PRL axes not only in the brain-pituitary but also in peripheral organs, the expression patterns of PrRP, PRL and growth hormone (GH) were characterized in amphibious euryhaline mudskippers (Periophthalmus modestus). PrRP mRNA is abundantly expressed not only in the brain but also in the liver, gut and ovary, while less abundant expression was also detected in the skin and kidney. Corresponding to the distribution of PrRP mRNA, PRL mRNA was also detectable in these organs. During adaptation to different environments, the changes in mRNA levels of PrRP paralleled those in PRL in the brain-pituitary, liver and gut in an organ-specific manner. Brain PrRP mRNA and the pituitary PRL mRNA increased under freshwater and terrestrial conditions (P,0·05); expression of PrRP and PRL in the gut of freshwater fish was higher (P,0·05) than those in sea-water fish although there were no changes in fish kept out of water; no significant change was seen in the liver. Expressions of GH were not correlated with PrRP. In the gut, PrRP and PRL appear to be co-localized in the mucosal layer, especially in the mucous cells. Thus, PrRP may also be a local modulator of extrapituitary PRL expression and the PrRP-PRL axes in various organs may play an organ-specific role during environmental adaptation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Expression of prolactin-releasing peptide and prolactin in the euryhaline mudskippers (Periophthalmus modestus): prolactin-releasing peptide as a primary regulator of prolactin

Sakamoto¹,

Amano²,

Hyodo³

et al. 2005

Journal of Molecular Endocrinology

View full text Add to dashboard Cite

show abstract

“…The PrRPs-31 has no stimulatory effect on PRL release in sheep (Curlewis et al, 2002), but it is essential for secretion of this hormone in teleost fish (Sakamoto et al, 2003). Chicken PrRPs-31/32 increases plasma PRL concentration in chicks when administered peripherally whereas infused centrally decreases PRL release, suggesting that in these animals PrRPs-31/32 has distinct effect on PRL secretion between tissue (Tachibana et al, 2011).…”

Section: Factors Stimulating Prolactin Releasementioning

confidence: 97%

Prolactin and the physiological regulation of its secretion. A review

Ciechanowska¹,

Misztal²,

Przekop³

2013

J. Anim. Feed Sci.

View full text Add to dashboard Cite

Effect of Stress During Handling, Seawater Acclimation, Confinement, and Induced Spawning on Plasma Ion Levels and Somatolactin‐Expressing Cells in Mature Female Liza ramada

et al. 2012

View full text Add to dashboard Cite

The present experiments were designed to determine the effect of different stress factors; handling, seawater acclimation, confinement, and induced spawning on plasma cortisol, hydro mineral balance as well as changes in size, number and integrated intensity of somatolactin (SL)-expressing cells in Liza ramada mature females confined to fresh water ponds. The plasma levels of cortisol, PO(4)(3-), Na(+), and K(+) were higher, while Ca(2+) and Mg(2+) were lower than controls during transportation without anesthesia. By using clove oil (5 mg L(-1)) as an anesthetic during transportation, the plasma cortisol, PO(4) (3-), Na(+), and K(+) were similar to controls, while Ca(2+) and Mg(2+) were higher. During seawater acclimation, the plasma cortisol and minerals were significantly higher except Na(+) which was lower than controls. In addition, during induction of spawning, the plasma levels of cortisol, PO(4)(3-), Na(+), K(+), and Mg(2+) were significantly higher than controls. The SL-producing cells are located in the pars intermedia (PI) bordering the neurohypophysis. The stress affected the number, size, and immunostaining of SL-expressing cells. During seawater acclimation, the size and the integrated intensity of SL immunoreactivity were lower, but the number of these cells was higher than controls. Furthermore, the number, size, and the integrated intensity of SL immunoreactivity were significantly lower than controls during handling and after spawning, which was opposite to confinement. The response of SL-expressing cells in PI in parallel with changes in cortisol and hydro mineral balance induced by stress support the possible role of SL in the adaptive response of fish to stress.

show abstract

Fishy tales of prolactin-releasing peptide

Cited by 43 publications

References 169 publications

Expression of prolactin-releasing peptide and prolactin in the euryhaline mudskippers (Periophthalmus modestus): prolactin-releasing peptide as a primary regulator of prolactin

Expression of prolactin-releasing peptide and prolactin in the euryhaline mudskippers (Periophthalmus modestus): prolactin-releasing peptide as a primary regulator of prolactin

Prolactin and the physiological regulation of its secretion. A review

Effect of Stress During Handling, Seawater Acclimation, Confinement, and Induced Spawning on Plasma Ion Levels and Somatolactin‐Expressing Cells in Mature Female Liza ramada

Contact Info

Product

Resources

About