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More Than a Tumor Marker…A Potential Role for Alpha-Feto Protein in Inflammatory Bowel Disease
Elyse A Linson1, Stephen B Hanauer2
1Northwestern Memorial Hospital, Chicago, Illinois.
Insights
Human alpha-fetoprotein (AFP) shows potential in regulating the immune system and reducing inflammation in autoimmune diseases. Further research may explore AFP as a therapeutic agent for inflammatory conditions.
Area of Science:
- Immunology
- Biochemistry
- Reproductive Biology
Background:
- Human alpha-fetoprotein (hAFP) is a glycoprotein produced by the yolk sac, fetal liver, and gastrointestinal tract.
- Serum AFP levels are undetectable in healthy adults but have clinical utility in pregnancy and malignancy monitoring.
- The precise physiological functions of AFP remain incompletely understood.
Purpose of the Study:
- To review the immunoregulatory role of AFP.
- To assess AFP's capacity to modulate disease activity in autoimmune disorders.
- To evaluate AFP's potential as a therapeutic agent.
Main Methods:
- Literature review focusing on AFP's immunomodulatory functions.
- Analysis of studies involving animal models of autoimmune diseases.
- Examination of human clinical studies, including those in pregnant patients.
Main Results:
- AFP induces T-cell suppressor activity and downregulates antigen expression on dendritic-like cells.
- AFP impairs macrophage function and is associated with reduced inflammation in animal models.
- AFP expression correlates with disease activity in pregnant patients with immune-mediated inflammatory diseases.
Conclusions:
- AFP exhibits significant immunoregulatory properties.
- AFP may hold potential as a novel therapeutic agent for inflammatory and autoimmune conditions.
- Further prospective studies in inflammatory bowel disease patients during pregnancy are warranted.
Background:
Human alpha-fetoprotein (hAFP) is a glycoprotein derived from the gut entoderm and expressed sequentially by cells of the yolk sac, fetal liver, and gastrointestinal tract. By adulthood, serum levels of alpha-fetoprotein (AFP) are undetectable in healthy, nonpregnant adults. Despite the clinical utilities of AFP monitoring in pregnancy and malignancy, much remains to be determined regarding its potential physiological functions.
Methods:
We focused on literature related to AFP's immunoregulatory role and its ability to modulate disease activity both in animal models of autoimmune disorders and in human clinical studies.
Results:
Evidence suggests that AFP plays an important role in immunoregulation by inducing T-cell suppressor activity, downregulating dendritic-like cell antigen expression, and impairing the function of macrophages. Studies evaluating AFP and its effects in rodent models of autoimmune diseases have shown that AFP is associated with downregulation of inflammation. Observations in studies of pregnant patients with immune-mediated inflammatory diseases have also described potential correlations between AFP expression and disease activity during different stages of pregnancy and postpartum.
Conclusions:
We propose further prospective evaluations of AFP expression during pregnancy in inflammatory bowel disease patients to further correlate with disease activity and consider the potential of AFP as a novel therapeutic agent.
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