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Inhibition of intestinal polyp growth by oral ingestion of bovine lactoferrin and immune cells in the large intestine
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Inhibition of intestinal polyp growth by oral ingestion of bovine lactoferrin and immune cells in the large intestine
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Journal Article
Inhibition of intestinal polyp growth by oral ingestion of bovine lactoferrin and immune cells in the large intestine
2014
Overview
Studies using animal models have demonstrated that ingestion of bovine lactoferrin (bLF) inhibits carcinogenesis in the colon and other organs of experimental animals. As a result of these studies, a blinded, randomized, controlled clinical trial was conducted in the National Cancer Center Hospital, Tokyo, Japan to determine whether ingestion of bLF had an effect on the growth of colorectal polyps in humans. Patients with colorectal polyps ≤5 mm diameter and likely to be adenomas ingested 0, 1.5, or 3.0 g bLF daily for 1 year. Ingestion of 3.0 g bLF suppressed the growth of colorectal polyps and increased the level of serum human lactoferrin in trial participants 63 years old or younger. The purpose of the present study was to investigate correlations between immune parameters and changes in polyp size. Trial participants with regressing polyps had increased NK cell activity, increased serum hLF levels (indicating increased neutrophil activity), and increased numbers of CD4+ cells in the polyps. These findings are consistent with a correlation between higher immune activity and suppression of colorectal polyps. In addition, participants with regressing polyps had lower numbers of PMNs and increased numbers of S100A8+ cells in the polyps, consistent with a correlation between lower inflammatory potential in the colon and suppression of colorectal polyps. Trial participants ingesting bLF had increased serum hLF levels, a possible increase in systemic NK cell activity, and increased numbers of CD4+ and CD161+ cells in the polyps. Taken together, our findings suggest that bLF suppressed colorectal polyps by enhancing immune responsiveness.
Publisher
Springer Netherlands,Springer Nature B.V
Subject
/ Animals
/ Biomedical and Life Sciences
/ Cattle
/ CD4-Positive T-Lymphocytes - immunology
/ Cell Adhesion Molecules - metabolism
/ Cells
/ Colon
/ GPI-Linked Proteins - metabolism
/ Human
/ Humans
/ Intestinal Polyps - drug therapy
/ Intestinal Polyps - immunology
/ Intestinal Polyps - pathology
/ Intestine, Large - drug effects
/ Intestine, Large - immunology
/ Intestine, Large - pathology
/ Killer Cells, Natural - immunology
/ Lactoferrin - administration & dosage
/ NK Cell Lectin-Like Receptor Subfamily B - metabolism
/ Serums
