Dietary magnesium, calcium homeostasis, and parathyroid gland activity of chickens

Breitenbach, RP; Wa, Gonnerman; Erfling, WL; Cs, Anast

doi:10.1152/ajplegacy.1973.225.1.12

Cited by 11 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hypocalcemia in a Mg deficiency occurs in several species (Breitenbach et al, 1973;Reddy et al, 1973;Chou et al, 1979;Welsh et al, 1981); the current results confirm this effect. However, serum Ca was not disturbed in hypomagnesemic chicks fed 260 ppm or more of Mg, showing that a marginal deficiency does not affect Ca homeostasis.…”

Section: Figure 2 Effect Of Mg-deficient Diets On Serumsupporting

confidence: 82%

Growth, Thyroid Function, and Serum Macromineral Levels in Magnesium-Deficient Chicks

1992

View full text Add to dashboard Cite

Growth and thyroid function were studied in Mg-deficient chicks. Dietary levels of 80 to 315 ppm Mg were compared with control levels of 578 to 787 ppm Mg. Signs of Mg deficiency appeared rapidly and acutely within 2 to 5 days at dietary levels of 250 to 260 ppm or lower. Growth and feed intake decreased progressively as the deficiency became more severe. Control chicks pair-fed with the deficient chicks gained significantly more weight. Serum Mg decreased at all levels of Mg below control, but at 260 and 315 ppm it returned to control values after 21 days on treatment. Serum Ca diminished only when dietary Mg was 250 ppm or less. Serum K increased in severely deficient chicks but decreased over time in milder deficiencies. Thyroid gland weights were unchanged. However, very young chicks fed a Mg-deficient diet had lower serum 3,5,3'-triiodothyronine (T3) whereas serum thyroxine (T4) was generally unaffected. Beyond 1 wk of age chicks that had prior access to a Mg-sufficient diet had low serum T4 levels whereas serum T3 was unchanged. Therefore, peripheral thyroid hormone metabolism is altered in a Mg deficiency, but this effect is dependent on the age at which the deficiency occurs.

show abstract

Section: Figure 2 Effect Of Mg-deficient Diets On Serumsupporting

confidence: 82%