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Gammaglutamyltransferase activity in buffalo mammary tissue during lactation

Published online by Cambridge University Press:  09 March 2007

M. E. Pero ,
N. Mirabella ,
P. Lombardi ,
C. Squillacioti ,
A. De Luca  and
L. Avallone
M. E. Pero
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
N. Mirabella
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
P. Lombardi*
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
C. Squillacioti
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
A. De Luca
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
L. Avallone
Affiliation:
Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Naples Federico II, Via Delpino 1, 80137, Napoli, Italy
*
†Corresponding author. E-mail: [email protected]
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Abstract

In the present study, the rôle of gammaglutamyltransferase (GGT) during lactation has been investigated in the water buffalo. GGT activity has been evaluated in the mammary tissue at 4 and 6 months after calving and during the non-lactating period. The highest GGT activity levels were found at day 120 (32·57±7·41 U per g) of lactation and were statistically higher than those at 180 (10·76±3·6 U per g) or during the non-lactating period (9·86±7·94 U per g). Histochemistry confirmed these findings and revealed that GGT reactivity was distributed throughout the cytoplasm of alveolar epithelial cells. Such results showed that the GGT production is high during lactation thus supporting the hypothesis that this enzyme plays a rôle in determining milk production in water buffalo by supporting milk protein synthesis.

Keywords

buffaloesγ-glutamyltransferasehistochemistrylactation
Type
Research Article
Information
Animal Science , Volume 82 , Issue 3 , June 2006 , pp. 351 - 354
Copyright
Copyright © British Society of Animal Science 2006

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