The aims of this study were to determine the effects of morning vs. evening milking time on blood and milk leptin. Six lactating (120±12 DIM) Saanen goats were randomly selected for this experiment. On two subsequent milkings, blood and milk samples were collected and milk yield and composition measured. On plasma and whole sonicated milk and skim milk, leptin content were analyzed. Mean morning milk yield, fat, and protein were respectively, 1.36 kg/d, 3.84 %, 3.58 %, whereas on evening milking the same variable measured were 1.11 kg/d, 3.97 % and 3.57 %. Morning and evening whole sonicated milk leptin content and total secretion did not show significant differences (17.91 vs. 23.77 mg/l, and 24.33 vs. 24.32 mg/milking, respectively), but a wide range of variability was observed. Skim milk leptin was higher (P<.05) in morning milk than evening one (5.43 vs. 4.53 mg/l), without significant correlation to plasma leptin at correspondent sampling time (4.05 vs. 3.90 mg/l). Three main conclusions can be drawn: 1) no correlation was observed between milk and plasma leptin; 2) skim milk showed a higher leptin level than plasma, suggesting a possible mammary secretion; 3) of total leptin measured in milk, 57% was associated to fat fraction, remarking that milk sampling and handling procedures must be as accurate as possible.

Leptin distribution in goat milk fractions / F. Rosi, L. Pinotti, A. Campagnoli, D. Magistrelli (ANNUAL MEETING OF THE EUROPEAN ASSOCIATION FOR ANIMAL PRODUCTION). - In: Annual meeting of the European Association for Animal Production : book of abstracts[s.l] : Wageningen Academic Pub, 2003. - ISBN 9789086865192. - pp. 221-221 (( Intervento presentato al 54. convegno Annual meeting of the European Association for Animal Production tenutosi a Roma nel 2003 [10.3920/978-90-8686-519-2].

Leptin distribution in goat milk fractions

F. Rosi
Primo
;
L. Pinotti
Secondo
;
A. Campagnoli
Penultimo
;
D. Magistrelli
Ultimo
2003

Abstract

The aims of this study were to determine the effects of morning vs. evening milking time on blood and milk leptin. Six lactating (120±12 DIM) Saanen goats were randomly selected for this experiment. On two subsequent milkings, blood and milk samples were collected and milk yield and composition measured. On plasma and whole sonicated milk and skim milk, leptin content were analyzed. Mean morning milk yield, fat, and protein were respectively, 1.36 kg/d, 3.84 %, 3.58 %, whereas on evening milking the same variable measured were 1.11 kg/d, 3.97 % and 3.57 %. Morning and evening whole sonicated milk leptin content and total secretion did not show significant differences (17.91 vs. 23.77 mg/l, and 24.33 vs. 24.32 mg/milking, respectively), but a wide range of variability was observed. Skim milk leptin was higher (P<.05) in morning milk than evening one (5.43 vs. 4.53 mg/l), without significant correlation to plasma leptin at correspondent sampling time (4.05 vs. 3.90 mg/l). Three main conclusions can be drawn: 1) no correlation was observed between milk and plasma leptin; 2) skim milk showed a higher leptin level than plasma, suggesting a possible mammary secretion; 3) of total leptin measured in milk, 57% was associated to fat fraction, remarking that milk sampling and handling procedures must be as accurate as possible.
goat; milk fat; milk leptin
Settore AGR/18 - Nutrizione e Alimentazione Animale
Settore VET/01 - Anatomia degli Animali Domestici
2003
Book Part (author)
File in questo prodotto:
File Dimensione Formato  
2003 EAAP Leptin in goa milk fraction 221.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 554.19 kB
Formato Adobe PDF
554.19 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/8127
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact