title: Serum and tissue concentrations of gallium after oral administration of gallium nitrate and gallium maltolate to neonatal calves.
abstract: OBJECTIVE
  To determine serum and tissue concentrations of gallium (Ga) after oral administration of gallium nitrate (GaN) and gallium maltolate (GaM) to neonatal calves.
  
  
  METHODS
  8 healthy neonatal calves.
  
  
  METHODS
  Calves were assigned to 1 of 2 groups (4 calves/group). Gallium (50 mg/kg) was administered as GaN or GaM (equivalent to 13.15 mg of Ga/kg for GaN and 7.85 mg of Ga/kg for GaM) by oral gavage once daily for 5 days. Blood samples were collected 0, 0.25, 0.5, 1, 2, 4, 8, 12, and 24 hours after Ga administration on day 1; 4 and 24 hours after Ga administration on days 2, 3, and 4; and 4, 12, and 24 hours after Ga administration on day 5. On day 6, calves were euthanized and tissue samples were obtained. Serum and tissue Ga concentrations were measured by use of mass spectrometry.
  
  
  RESULTS
  Data were adjusted for total Ga dose, and comparisons were made between the 2 groups. Calves receiving GaM had a significantly higher dose-adjusted area under the curve and dose-adjusted maximum serum Ga concentration than did calves receiving GaN. Despite receiving less Ga per dose, calves receiving GaM had tissue Ga concentrations similar to those for calves receiving GaN.
  
  
  CONCLUSIONS
  In this study, calves receiving GaM had significantly higher Ga absorption than did calves receiving GaN. These findings suggested that GaM might be useful as a prophylactic agent against Mycobacterium avium subsp paratuberculosis infection in neonatal calves.
authors.forename: Caroline S
authors.initials: CS
authors.lastname: Monk
authors.forename: Raymond W
authors.initials: RW
authors.lastname: Sweeney
authors.forename: Lawrence R
authors.initials: LR
authors.lastname: Bernstein
authors.forename: Marie-Eve
authors.initials: ME
authors.lastname: Fecteau
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000831:Animals, Newborn; D002417:Cattle; D005708:Gallium / Q000008:administration & dosage / Q000097:blood* / Q000378:metabolism / Q000493:pharmacokinetics; D008297:Male; D013058:Mass Spectrometry; D009942:Organometallic Compounds / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D011753:Pyrones / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*
chemical_list: D009942:Organometallic Compounds; D011753:Pyrones; C512662:gallium maltolate; D005708:Gallium; C027235:gallium nitrate