Close Association between Fas Ligand (FasL; CD95L)‐positive Tumor‐associated Macrophages and Apoptotic Cancer Cells along Invasive Margin of Colorectal Carcinoma: A Proposal on Tumor‐Host Interactions

Anti‐tumor immune responses are considered to be one of the key host reactions in human colorectal cancer, with T cells as important effector cells. For the induction of tumor‐specific immunity, processing of cancer cells and pruning of T cells by antigen‐presenting cells are important. The present...

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Veröffentlicht in:Cancer science 2002-03, Vol.93 (3), p.320-328
Hauptverfasser: Sugita, Junichi, Ohtani, Haruo, Mizoi, Takayuki, Saito, Kazuya, Shiiba, Kenichi, Sasaki, Iwao, Matsuno, Seiki, Yagita, Hideo, Miyazawa, Masaaki, Nagura, Hiroshi
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container_end_page 328
container_issue 3
container_start_page 320
container_title Cancer science
container_volume 93
creator Sugita, Junichi
Ohtani, Haruo
Mizoi, Takayuki
Saito, Kazuya
Shiiba, Kenichi
Sasaki, Iwao
Matsuno, Seiki
Yagita, Hideo
Miyazawa, Masaaki
Nagura, Hiroshi
description Anti‐tumor immune responses are considered to be one of the key host reactions in human colorectal cancer, with T cells as important effector cells. For the induction of tumor‐specific immunity, processing of cancer cells and pruning of T cells by antigen‐presenting cells are important. The present study was designed to clarify the relationship between Fas ligand (FasL; CD95L) expression and apoptotic cancer cells. Immunohistochemistry using frozen sections taken from 58 patients with colorectal cancer revealed that stromal cells composed mainly of tumor‐associated macrophages expressed FasL, leaving cancer cells negative for FasL. These macrophages were abundantly distributed along the invasive margin. In situ hybridization revealed that these macrophages as well as cancer cells expressed FasL mRNA, whereas macrophages in the normal colon mucosa rarely expressed FasL. Apoptotic cancer cells recognized by monoclonal antibody M30 CytoDEATH were localized not only in cancer cell nests, but also in the stroma along the invasive margin showing a dissociated pattern, which was particularly evident in the areas of FasL+ macrophages. Furthermore, these macrophages, phenotypically similar to dendritic cells, occasionally contained M30+ apoptotic cancer cells in the cytoplasm. Clinicopathologic analyses in 123 cases revealed 1) a positive correlation between the degree of dissociated M30+ apoptotic cancer cells and the number of macrophages along the invasive margin and 2) an inverse association between the degree of dissociated M30+ apoptotic cancer cells and the occurrence of hematogenous metastasis after surgical resection of the primary tumor. In conclusion, the present study shows the impor‐ tance of FasL+ activated macrophages as one of the host defense mechanisms against cancer cell spread in human colorectal cancer.
doi_str_mv 10.1111/j.1349-7006.2002.tb02175.x
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For the induction of tumor‐specific immunity, processing of cancer cells and pruning of T cells by antigen‐presenting cells are important. The present study was designed to clarify the relationship between Fas ligand (FasL; CD95L) expression and apoptotic cancer cells. Immunohistochemistry using frozen sections taken from 58 patients with colorectal cancer revealed that stromal cells composed mainly of tumor‐associated macrophages expressed FasL, leaving cancer cells negative for FasL. These macrophages were abundantly distributed along the invasive margin. In situ hybridization revealed that these macrophages as well as cancer cells expressed FasL mRNA, whereas macrophages in the normal colon mucosa rarely expressed FasL. Apoptotic cancer cells recognized by monoclonal antibody M30 CytoDEATH were localized not only in cancer cell nests, but also in the stroma along the invasive margin showing a dissociated pattern, which was particularly evident in the areas of FasL+ macrophages. Furthermore, these macrophages, phenotypically similar to dendritic cells, occasionally contained M30+ apoptotic cancer cells in the cytoplasm. Clinicopathologic analyses in 123 cases revealed 1) a positive correlation between the degree of dissociated M30+ apoptotic cancer cells and the number of macrophages along the invasive margin and 2) an inverse association between the degree of dissociated M30+ apoptotic cancer cells and the occurrence of hematogenous metastasis after surgical resection of the primary tumor. 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Liver. Pancreas. Abdomen ; Host-tumor relations. Immunology. Biological markers ; Humans ; Hybridization ; Immunoenzyme Techniques ; Immunohistochemistry ; In Situ Hybridization ; Invasiveness ; Ligands ; Lymphocytes T ; Macrophage Activation - physiology ; Macrophages ; Macrophages - metabolism ; Male ; Medical sciences ; Membrane Glycoproteins - metabolism ; Metastases ; Microscopy, Immunoelectron ; Middle Aged ; Monoclonal antibodies ; mRNA ; Mucosa ; Neoplasm Invasiveness - genetics ; Prognosis ; Stomach. Duodenum. Small intestine. Colon. Rectum. Anus ; Stromal cells ; Tumors ; Tumor‐associated macrophages</subject><ispartof>Cancer science, 2002-03, Vol.93 (3), p.320-328</ispartof><rights>2002 INIST-CNRS</rights><rights>Copyright John Wiley &amp; Sons, Inc. 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In conclusion, the present study shows the impor‐ tance of FasL+ activated macrophages as one of the host defense mechanisms against cancer cell spread in human colorectal cancer.</description><subject>Aged</subject><subject>Antigen-presenting cells</subject><subject>Antigens, CD - immunology</subject><subject>Antigens, CD - metabolism</subject><subject>Antigens, Differentiation, Myelomonocytic - immunology</subject><subject>Antigens, Differentiation, Myelomonocytic - metabolism</subject><subject>Anti‐tumor immunity</subject><subject>Apoptosis</subject><subject>Apoptosis - physiology</subject><subject>Biological and medical sciences</subject><subject>Colorectal cancer</subject><subject>Colorectal carcinoma</subject><subject>Colorectal Neoplasms - metabolism</subject><subject>Colorectal Neoplasms - pathology</subject><subject>Cytoplasm</subject><subject>Dendritic cells</subject><subject>Effector cells</subject><subject>Fas ligand</subject><subject>Fas Ligand Protein</subject><subject>fas Receptor - immunology</subject><subject>fas Receptor - metabolism</subject><subject>FasL protein</subject><subject>Female</subject><subject>Gastroenterology. 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Furthermore, these macrophages, phenotypically similar to dendritic cells, occasionally contained M30+ apoptotic cancer cells in the cytoplasm. Clinicopathologic analyses in 123 cases revealed 1) a positive correlation between the degree of dissociated M30+ apoptotic cancer cells and the number of macrophages along the invasive margin and 2) an inverse association between the degree of dissociated M30+ apoptotic cancer cells and the occurrence of hematogenous metastasis after surgical resection of the primary tumor. In conclusion, the present study shows the impor‐ tance of FasL+ activated macrophages as one of the host defense mechanisms against cancer cell spread in human colorectal cancer.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>11927015</pmid><doi>10.1111/j.1349-7006.2002.tb02175.x</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects Aged
Antigen-presenting cells
Antigens, CD - immunology
Antigens, CD - metabolism
Antigens, Differentiation, Myelomonocytic - immunology
Antigens, Differentiation, Myelomonocytic - metabolism
Anti‐tumor immunity
Apoptosis
Apoptosis - physiology
Biological and medical sciences
Colorectal cancer
Colorectal carcinoma
Colorectal Neoplasms - metabolism
Colorectal Neoplasms - pathology
Cytoplasm
Dendritic cells
Effector cells
Fas ligand
Fas Ligand Protein
fas Receptor - immunology
fas Receptor - metabolism
FasL protein
Female
Gastroenterology. Liver. Pancreas. Abdomen
Host-tumor relations. Immunology. Biological markers
Humans
Hybridization
Immunoenzyme Techniques
Immunohistochemistry
In Situ Hybridization
Invasiveness
Ligands
Lymphocytes T
Macrophage Activation - physiology
Macrophages
Macrophages - metabolism
Male
Medical sciences
Membrane Glycoproteins - metabolism
Metastases
Microscopy, Immunoelectron
Middle Aged
Monoclonal antibodies
mRNA
Mucosa
Neoplasm Invasiveness - genetics
Prognosis
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Stromal cells
Tumors
Tumor‐associated macrophages
title Close Association between Fas Ligand (FasL; CD95L)‐positive Tumor‐associated Macrophages and Apoptotic Cancer Cells along Invasive Margin of Colorectal Carcinoma: A Proposal on Tumor‐Host Interactions
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