TY - JOUR
T1 - Effect of fecal water on an in vitro model of colonic mucosal barrier function
AU - Gill, Chris I.R.
AU - Heavey, Patricia
AU - McConville, Eileen
AU - Bradbury, Ian
AU - Fässler, Caroline
AU - Mueller, Susanne
AU - Cresci, Alberto
AU - Dore, Joel
AU - Norin, Elisabeth
AU - Rowland, Ian
PY - 2007
Y1 - 2007
N2 - Fecal water (FW) has been shown to exert, in cultured cells, cytotoxic and genotoxic effects that have implications for colorectal cancer (CRC) risk. We have investigated a further biological activity of FW, namely, the ability to affect gap junctions in CACO2 cell monolayers as an index of mucosal barrier function, which is known to be disrupted in cancer. FW samples from healthy, free-living, European subjects that were divided into two broad age groups, adult (40 ± 9.7 yr; n = 53) and elderly (76 ± 7.5 yr; n = 55) were tested for effects on gap junction using the transepithelial resistance (TER) assay. Overall, treatment of CACO2 cells with FW samples from adults increased TER (+4%), whereas FW from elderly subjects decreased TER (-5%); the difference between the two groups was significant (P < 0.05). We also measured several components of FW potentially associated with modulation of TER, namely, short-chain fatty acid (SCFA) and ammonia. SCFAs (propionic, acetic, and n-butyric) were significantly lower in the elderly population (-30%, -35%, and -21%, respectively, all P £ 0.01). We consider that FW modulation of in vitro epithelial barrier function is a potentially useful noninvasive biomarker, but it requires further validation to establish its relationship to CRC risk.
AB - Fecal water (FW) has been shown to exert, in cultured cells, cytotoxic and genotoxic effects that have implications for colorectal cancer (CRC) risk. We have investigated a further biological activity of FW, namely, the ability to affect gap junctions in CACO2 cell monolayers as an index of mucosal barrier function, which is known to be disrupted in cancer. FW samples from healthy, free-living, European subjects that were divided into two broad age groups, adult (40 ± 9.7 yr; n = 53) and elderly (76 ± 7.5 yr; n = 55) were tested for effects on gap junction using the transepithelial resistance (TER) assay. Overall, treatment of CACO2 cells with FW samples from adults increased TER (+4%), whereas FW from elderly subjects decreased TER (-5%); the difference between the two groups was significant (P < 0.05). We also measured several components of FW potentially associated with modulation of TER, namely, short-chain fatty acid (SCFA) and ammonia. SCFAs (propionic, acetic, and n-butyric) were significantly lower in the elderly population (-30%, -35%, and -21%, respectively, all P £ 0.01). We consider that FW modulation of in vitro epithelial barrier function is a potentially useful noninvasive biomarker, but it requires further validation to establish its relationship to CRC risk.
UR - http://www.scopus.com/inward/record.url?scp=34249907043&partnerID=8YFLogxK
U2 - 10.1080/01635580701268220
DO - 10.1080/01635580701268220
M3 - Article
AN - SCOPUS:34249907043
SN - 0163-5581
VL - 57
SP - 59
EP - 65
JO - Nutrition and Cancer
JF - Nutrition and Cancer
IS - 1
ER -