Abstract:
:alpha 2,6 sialyltransferase towards the N-acetyllactosaminyl sequence (alpha 2,6 ST, E.C. 2.4.99.1) is one of the major sialyltransferases in human colonic cells; it strongly increases in human colorectal tumors and is largely expressed in fetal and neonatal rat colon. In this study we demonstrate that human colon carcinoma CaCo-2 cells, which differentiate spontaneously into enterocytes when maintained confluent for several days, exhibit a very high expression of alpha 2,6 ST both in the cell-bound and soluble form. When the CaCo-2 cells were cultured on porous membranes the soluble alpha 2,6 ST was mainly detected in the medium collected from the chamber corresponding to the basolateral face of the monolayer. The soluble alpha 2,6 ST could be concentrated and purified from the alpha 2,3 sialyltransferase by affinity chromatography on Blue Sepharose.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Dall'Olio F,Malagolini N,Serafini-Cessi Fdoi
10.1016/s0006-291x(05)80039-7subject
Has Abstractpub_date
1992-05-15 00:00:00pages
1405-10issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(05)80039-7journal_volume
184pub_type
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