title: Relative and combined effects of ethanol and protein deficiency on bone manganese and copper.
abstract: Both manganese and copper may affect bone synthesis. Bone content of both metals can be altered in alcoholics, although controversy exists regarding this matter. To analyse the relative and combined effects of ethanol and a low protein diet on bone copper and manganese, and their relationships with bone structure and metabolism, including trabecular bone mass (TBM), osteoid area (OA), osteocalcin (OCN), insulin-like growth factor-1 (IGF-1), parathyroid hormone (PTH), urinary hydroxyproline (uHP) and vitamin D. Adult male Sprague-Dawley rats were divided into four groups. The control rats received a 18% protein-containing diet; a second group, an isocaloric, 2% protein-containing diet; a third one, an isocaloric, 36% ethanol-containing diet and a fourth, an isocaloric diet containing 2% protein and 36% ethanol. After sacrifice, TBM and OA were histomorphometrically assessed; bone and serum manganese and copper were determined by atomic absorption spectrophotometry, and serum OCN, IGF-1, PTH, uHP and vitamin D by radioimmunoassay. Ethanol-fed rats showed decreased TBM and bone manganese. Significant relationships existed between bone manganese and TBM, serum IGF-1 and OCN. Ethanol leads to a decrease in bone manganese, related to decreased bone mass and bone synthesis. No alterations were found in bone copper.
authors.affiliation: Servicio de Medicina Interna, Hospital Universitario de Canarias, Tenerife-Canary Islands, Spain. jmgperez79@gmail.com
authors.forename: José M
authors.initials: JM
authors.lastname: González-Pérez
authors.forename: Emilio
authors.initials: E
authors.lastname: González-Reimers
authors.forename: María José
authors.initials: MJ
authors.lastname: DeLaVega-Prieto
authors.forename: María del Carmen
authors.initials: Mdel C
authors.lastname: Durán-Castellón
authors.forename: José
authors.initials: J
authors.lastname: Viña-Rodríguez
authors.forename: Luis
authors.initials: L
authors.lastname: Galindo-Martín
authors.forename: Julio
authors.initials: J
authors.lastname: Alvisa-Negrín
authors.forename: Francisco
authors.initials: F
authors.lastname: Santolaria-Fernández
mesh_terms: D000818:Animals; D015519:Bone Density / Q000187:drug effects; D001842:Bone and Bones / Q000187:drug effects* / Q000378:metabolism; D002492:Central Nervous System Depressants / Q000008:administration & dosage / Q000494:pharmacology; D003300:Copper / Q000097:blood / Q000378:metabolism*; D018753:Diet, Protein-Restricted / Q000009:adverse effects; D000431:Ethanol / Q000008:administration & dosage / Q000494:pharmacology*; D006909:Hydroxyproline / Q000652:urine; D007334:Insulin-Like Growth Factor I / Q000378:metabolism; D008297:Male; D008345:Manganese / Q000097:blood / Q000378:metabolism*; D015675:Osteocalcin / Q000097:blood; D010281:Parathyroid Hormone / Q000097:blood; D011488:Protein Deficiency / Q000097:blood / Q000378:metabolism* / Q000503:physiopathology; D011863:Radioimmunoassay; D051381:Rats; D017207:Rats, Sprague-Dawley; D013054:Spectrophotometry, Atomic; D014807:Vitamin D / Q000097:blood
chemical_list: D002492:Central Nervous System Depressants; D010281:Parathyroid Hormone; D015675:Osteocalcin; D014807:Vitamin D; D000431:Ethanol; D008345:Manganese; D007334:Insulin-Like Growth Factor I; D003300:Copper; D006909:Hydroxyproline