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Updated: Jun 22, 2025
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Isolation and Flow Cytometric Characterization of Murine Small Intestinal Lymphocytes
Published on: May 8, 2016
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Non B Cell-Derived Immunoglobulins in Intestinal Tract
Zihan Geng1, Lina Wu2, Qianqian Wang3
1Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China. zhgeng@icmm.ac.cn.
Advances in Experimental Medicine and Biology
|July 5, 2024
Summary
Intestinal epithelial cells produce immunoglobulins (Igs), including unique cancer-derived IgG. These Igs promote colorectal cancer (CRC) progression and immune escape, offering potential diagnostic and therapeutic targets.
Area of Science:
- Immunology
- Gastroenterology
- Oncology
Background:
- The intestinal epithelium acts as a crucial barrier against pathogens and harmful substances.
- Intestinal epithelial cells possess innate immune functions and contribute to immune homeostasis via immunoglobulin A (IgA) and other antibodies.
- Recent findings indicate that intestinal epithelial cells, not just plasma cells, produce significant amounts of immunoglobulins (Igs).
Purpose of the Study:
- To investigate the role of immunoglobulins (Igs) produced by intestinal epithelial cells, particularly in the context of colorectal cancer (CRC).
- To explore the unique characteristics and functions of cancer cell-derived Igs, including SIA-IgG and free Ig light chains, in CRC development and progression.
Main Methods:
- Analysis of immunoglobulin (Ig) expression in colorectal cancer (CRC) cells.
- Characterization of unique features of cancer-derived Igs, such as V(D)J rearrangement and sialic acid modification (SIA-IgG).
- Investigation of the functional roles of cancer-derived Igs and free Ig light chains in CRC initiation, progression, metastasis, and immune evasion.
Main Results:
- Colorectal cancer (CRC) cells overexpress Igs, particularly IgG, with distinct V(D)J rearrangement patterns compared to B cell-derived Ig.
- Cancer-derived IgG exhibits unique sialic acid modification (SIA-IgG) crucial for promoting CRC initiation, progression, metastasis, and immune escape.
- CRC cells also express free Ig light chains that contribute to colitis, associated carcinogenesis, and CRC progression.
Conclusions:
- Immunoglobulins (Igs) expressed by colorectal cancer (CRC) cells, including SIA-IgG and free Ig light chains, play significant roles in cancer development and progression.
- These cancer-associated Igs represent potential biomarkers for diagnosing and preventing inflammation-induced cancer.
- Targeting cancer cell-derived Igs offers a promising strategy for the treatment of colorectal cancer (CRC).
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