Ki-1 positive large cell anaplastic lymphoma: multiple bone lytic lesions and interleukin-6.
Ki-1-positive large cell anaplastic lymphoma (Ki-1 LCAL) is recognized as a clinicopathologic syndrome with fever, peripheral lymphadenopathy and cutaneous nodules; the neoplastic cells express Hodgkin's disease-associated antigen, Ki-1 (CD30). We review here a recent case of Ki-1 LCAL with multiple bone lesions with destruction and present additional information. Although bone absorption is reported in some cases of Ki-1 LCAL, the genesis of bone absorption is unclear. Interleukin-6 (IL-6) is an important regulator of osteoclast formation and activation and can induce bone absorption. In our case, the surgically removed tumor tissue was studied for IL-6 mRNA expression and IL-6 secretion without any stimulation. Northern blot analysis showed strong IL-6 mRNA expression in the tumor tissue and ELISA assay showed a large amount of IL-6 in culture supernatants of the tumor tissue. Based on these results, coupled with the reported evidence, we discuss the close relationship between the presence of osteolytic lesions and IL-6 production in Ki-1 LCAL.
Agematsu
K
K
Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan.
Komiyama
A
A
D015703:Antigens, CD / Q000032:analysis*; D000951:Antigens, Neoplasm / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis; D001842:Bone and Bones / Q000473:pathology*; D002648:Child; D005838:Genotype; D006801:Humans; D015850:Interleukin-6 / Q000032:analysis / Q000096:biosynthesis* / Q000235:genetics; D017730:Ki-1 Antigen; D016403:Lymphoma, Large B-Cell, Diffuse / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D008297:Male; D010006:Osteoblasts / Q000502:physiology; D010014:Osteolysis / Q000473:pathology; D012333:RNA, Messenger / Q000032:analysis
D015703:Antigens, CD; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D015850:Interleukin-6; D017730:Ki-1 Antigen; D012333:RNA, Messenger