Abstract:
:HT 29-D4 is a clonal cell line, derived from the human colon adenocarcinoma cell line HT 29, which can be induced to differentiate into enterocyte-like cells by replacing glucose with galactose in the culture medium (Fantini et al. [1986], J. Cell Sci. 83, 235-249). Both undifferentiated and differentiated HT 29-D4 cells have been successfully grown to confluency in Costar Transwell permeable chambers. Only HT 29-D4 cells grown in glucose-free, galactose-containing medium were able to form leakproof monolayers, as demonstrated by their ability to prevent diffusion of serum proteins. These monolayers consist of highly polarized epithelial-like cells with a well organized apical brush border. Transepithelial electrical parameters have been measured under sterile conditions for both types of monolayer. Only HT 29-D4 monolayers cultured in glucose-free, galactose-containing medium were electrically active, with a transepithelial resistance R = 172 +/- 46 omega.cm2, a potential difference PD = 0.35 +/- 0.05 mV, apical negative and a short-circuit current Isc = 2.0 +/- 0.4 microA.cm-2. Apical addition of amphotericin B induced a rapid and considerable increase in Isc and PD, which was abolished by basal ouabain. In contrast, HT 29-D4 cells grown in glucose-containing medium did not generate any potential difference (PD = 0 mV) and their resistance was very low (R = 34.1 +/- 0.9 omega.cm2). It is concluded from these studies that HT 29-D4 cells grown in glucose-free, galactose-containing medium acquire functional characteristics of epithelia, compared to HT 29-D4 cells grown in glucose-containing medium.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Biol Celljournal_title
Biology of the cellauthors
Fantini J,Verrier B,Marvaldi J,Mauchamp Jsubject
Has Abstractpub_date
1989-01-01 00:00:00pages
163-9issue
2eissn
0248-4900issn
1768-322Xpii
0248-4900(89)90024-5journal_volume
65pub_type
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