Bourne F J, Curtis J
Immunology. 1973 Jan;24(1):157-62.
The proportion of IgA, IgG and IgM in sow colostrum and milk that is derived from serum has been determined by measuring the transfer of I-labelled immunoglobulin from serum. All colostral IgG and a high proportion of IgM are derived from serum as is 40 per cent of IgA. Thus it would appear that colostrum is not a true secretion since 90 per cent of its immunoglobulin content is of serum origin. In milk, however, 90 per cent of IgA and IgM and 70 per cent of IgG would appear to be locally produced in mammary tissue.
通过测量血清中 I 标记免疫球蛋白的转移情况,已确定了母猪初乳和乳汁中源自血清的 IgA、IgG 和 IgM 的比例。所有初乳中的 IgG 以及高比例的 IgM 都源自血清,IgA 的 40% 也是如此。因此,初乳似乎并非真正的分泌物,因为其免疫球蛋白含量的 90% 源自血清。然而,在乳汁中,90% 的 IgA 和 IgM 以及 70% 的 IgG 似乎是在乳腺组织中局部产生的。