Iron mobilization in estrogenized male quail

Iron Content and Distribution in Japanese Quail

“…iron). The initial values agreed, quite well, with previous data obtained in non-laying hens (Garcia et al 1984b).…”

“…Liver weight was higher in females than in males; the laying process induced an initial reduction in females. Similar results were seem 96 h after a single oestrogen administration (Garcia et al 1984b).…”

“…During the laying period, oestrogen induced iron mobilization, with a 4-5 times increase in plasma iron bound to vitellogenin and to transferrin (Fig. 1), as has been also observed in other species under natural conditions (Planas, de Castro & Recio, 1961;Lopez-Berges, Recio & Planas, 1981) or after oestrogen administration (Ramsay & Campbell, 1956;Garcia et al 1984b).…”

“…Thus, during this period the iron is mobilized from its deposits increasing plasma iron content (Ramsay & Campbell, 1954) and plasma iron turn-over (Balasch & Planas, 1972). Oestrogen mediates this mobilization affecting the iron levels, especially in the liver (Garcia, Sanchez & Planas, 1984b), as was noted in immature pullets (Ramsay & Campbell, 1956).…”

Iron Content and Distribution in Japanese Quail

“…iron). The initial values agreed, quite well, with previous data obtained in non-laying hens (Garcia et al 1984b).…”

“…Liver weight was higher in females than in males; the laying process induced an initial reduction in females. Similar results were seem 96 h after a single oestrogen administration (Garcia et al 1984b).…”

“…During the laying period, oestrogen induced iron mobilization, with a 4-5 times increase in plasma iron bound to vitellogenin and to transferrin (Fig. 1), as has been also observed in other species under natural conditions (Planas, de Castro & Recio, 1961;Lopez-Berges, Recio & Planas, 1981) or after oestrogen administration (Ramsay & Campbell, 1956;Garcia et al 1984b).…”

“…Thus, during this period the iron is mobilized from its deposits increasing plasma iron content (Ramsay & Campbell, 1954) and plasma iron turn-over (Balasch & Planas, 1972). Oestrogen mediates this mobilization affecting the iron levels, especially in the liver (Garcia, Sanchez & Planas, 1984b), as was noted in immature pullets (Ramsay & Campbell, 1956).…”

Hematological changes associated with egg production: estrogen dependence and repeatability

“…However, similar differential effects on estrogendependent reproductive traits have been documented here and in previous studies: tamoxifen treatment causes a robust decrease in egg size (Williams, 2000;Williams, 2001;Wagner and Williams, 2007), whereas exogenous estradiol does not increase egg size (Christians and Williams, 1999;Williams, 1999). Although previous studies have reported that estradiol treatment induces anemia (range -2 to -15%) in domestic fowl (Domm and Taber, 1946;Sturkie and Eiel, 1966), pilgrim geese (Hunsaker, 1968), Japanese quail (Nirmalan and Robinson, 1972;Nirmalan and Robinson, 1973;Garcia et al, 1984), rain quail (Deshmukh and Suryawanshi, 1982) and white-crowned sparrows (Kern et al, 1972), these studies all used non-breeding birds, which would have low baseline levels of endogenous estrogens. To our knowledge, our study is the first to assess effects of physiological levels of estradiol on hematological parameters in laying females specifically within the context of egg production.…”

Iron Content and Distribution in Japanese Quail

“…iron). The initial values agreed, quite well, with previous data obtained in non-laying hens (Garcia et al 1984b).…”

“…Liver weight was higher in females than in males; the laying process induced an initial reduction in females. Similar results were seem 96 h after a single oestrogen administration (Garcia et al 1984b).…”

“…During the laying period, oestrogen induced iron mobilization, with a 4-5 times increase in plasma iron bound to vitellogenin and to transferrin (Fig. 1), as has been also observed in other species under natural conditions (Planas, de Castro & Recio, 1961;Lopez-Berges, Recio & Planas, 1981) or after oestrogen administration (Ramsay & Campbell, 1956;Garcia et al 1984b).…”

“…Thus, during this period the iron is mobilized from its deposits increasing plasma iron content (Ramsay & Campbell, 1954) and plasma iron turn-over (Balasch & Planas, 1972). Oestrogen mediates this mobilization affecting the iron levels, especially in the liver (Garcia, Sanchez & Planas, 1984b), as was noted in immature pullets (Ramsay & Campbell, 1956).…”

Hematological changes associated with egg production: estrogen dependence and repeatability

“…However, similar differential effects on estrogendependent reproductive traits have been documented here and in previous studies: tamoxifen treatment causes a robust decrease in egg size (Williams, 2000;Williams, 2001;Wagner and Williams, 2007), whereas exogenous estradiol does not increase egg size (Christians and Williams, 1999;Williams, 1999). Although previous studies have reported that estradiol treatment induces anemia (range -2 to -15%) in domestic fowl (Domm and Taber, 1946;Sturkie and Eiel, 1966), pilgrim geese (Hunsaker, 1968), Japanese quail (Nirmalan and Robinson, 1972;Nirmalan and Robinson, 1973;Garcia et al, 1984), rain quail (Deshmukh and Suryawanshi, 1982) and white-crowned sparrows (Kern et al, 1972), these studies all used non-breeding birds, which would have low baseline levels of endogenous estrogens. To our knowledge, our study is the first to assess effects of physiological levels of estradiol on hematological parameters in laying females specifically within the context of egg production.…”

Iron Content and Distribution in Japanese Quail

“…iron). The initial values agreed, quite well, with previous data obtained in non-laying hens (Garcia et al 1984b).…”

“…Liver weight was higher in females than in males; the laying process induced an initial reduction in females. Similar results were seem 96 h after a single oestrogen administration (Garcia et al 1984b).…”

“…During the laying period, oestrogen induced iron mobilization, with a 4-5 times increase in plasma iron bound to vitellogenin and to transferrin (Fig. 1), as has been also observed in other species under natural conditions (Planas, de Castro & Recio, 1961;Lopez-Berges, Recio & Planas, 1981) or after oestrogen administration (Ramsay & Campbell, 1956;Garcia et al 1984b).…”

“…Thus, during this period the iron is mobilized from its deposits increasing plasma iron content (Ramsay & Campbell, 1954) and plasma iron turn-over (Balasch & Planas, 1972). Oestrogen mediates this mobilization affecting the iron levels, especially in the liver (Garcia, Sanchez & Planas, 1984b), as was noted in immature pullets (Ramsay & Campbell, 1956).…”

Hematological changes associated with egg production: estrogen dependence and repeatability

“…However, similar differential effects on estrogendependent reproductive traits have been documented here and in previous studies: tamoxifen treatment causes a robust decrease in egg size (Williams, 2000;Williams, 2001;Wagner and Williams, 2007), whereas exogenous estradiol does not increase egg size (Christians and Williams, 1999;Williams, 1999). Although previous studies have reported that estradiol treatment induces anemia (range -2 to -15%) in domestic fowl (Domm and Taber, 1946;Sturkie and Eiel, 1966), pilgrim geese (Hunsaker, 1968), Japanese quail (Nirmalan and Robinson, 1972;Nirmalan and Robinson, 1973;Garcia et al, 1984), rain quail (Deshmukh and Suryawanshi, 1982) and white-crowned sparrows (Kern et al, 1972), these studies all used non-breeding birds, which would have low baseline levels of endogenous estrogens. To our knowledge, our study is the first to assess effects of physiological levels of estradiol on hematological parameters in laying females specifically within the context of egg production.…”