Immunohistolocalization of carbonic anhydrase isozyme (CA-VI) in bovine mammary glands
2003
Ichihara, N. (Azabu Univ., Sagamihara, Kanagawa (Japan)) | Asari, M. | Kasuya, T. | Susaki, E. | Matsui, K. | Nishita, T. | Amasaki, H.
ABSTRACT. The localization of bovine carbonic anhydrate isozyme VI (CA-VI) was examined immunohistochemically in bovine mammary glands during early lactation period (after 2-3 days of postpartum) and dry period (at about 2 months preparturition in adults), and young calves (at 30 and 150 days after birth) using specific CA-VI antiserum. The immunoreaction for anti-CA-VI antiserum was very weak in the maimmary glands in young (prepubescent) calves. In dry period, CA-VI was also weakly expressed in secretory epithelial (acinar) and ductal cells. In contrast, the reaction was intense in mammary gland cells in early lactation period. Dot blotting analysis indicated that anti-CA-VI reacted positively to beastings and mature saliva, but weakly or not at all to milk during the dry period or calf saliva, respectively. The intense expression of CA-VI in the mammary glands in early lactation period might compensate for low levels of secretion from functionally and structurally immature salivary glands in young calves.
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