Dendritic cell distribution in lymphomas.
Dendritic cells (DC) are specialized antigen presenting cells (APC) that have important roles in host defenses and in generating anti-tumour immune response. Altered frequency and maturation of DC have been reported in malignant tumours. We studied the distribution and maturation status of DC by immunohistochemistry, on the formalin-fixed, paraffin-embedded lymph node tissues of 32 histologically diagnosed lymphomas and 40 inflammatory conditions that were retrieved from the Department of Pathology, UKM Medical Centre, Kuala Lumpur. Our study showed a significant reduction in the total DC counts in the lymphoma tissues compared to the inflammatory conditions. The mature and immature DC counts were both significantly reduced (p = 0.008 and 0.001 respectively), although a greater reduction was observed in mature DC numbers. We also observed compartmentalization of DC where the immature DC were seen within the tumour tissues and the mature DC were more in peri-tumoural areas. Our findings were similar to other reports, suggesting that reduced numbers of DC appears to be a factor contributing to lack of tumour surveillance in these cases.
Department of Pathology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur.
Hamidah Noor
HN
Hussin
Fadzilah Noor
FN
Zulkifli
Koon Song
KS
Phang
Soon Keng
SK
Cheong
D000328:Adult; D015703:Antigens, CD / Q000378:metabolism; D018949:Antigens, CD1 / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D002452:Cell Count; D003713:Dendritic Cells / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006689:Hodgkin Disease / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D007136:Immunoglobulins / Q000378:metabolism; D007150:Immunohistochemistry; D008198:Lymph Nodes / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D008224:Lymphoma, Follicular / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D017728:Lymphoma, Large-Cell, Anaplastic / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism; D008875:Middle Aged; D009367:Neoplasm Staging; D055815:Young Adult; D000097802:CD83 Antigen
D015703:Antigens, CD; D018949:Antigens, CD1; D014408:Biomarkers, Tumor; D007136:Immunoglobulins; D008562:Membrane Glycoproteins; D000097802:CD83 Antigen; C419393:CD1a antigen