title: Expression of KIAA 0864 protein in neuroepithelial tumors: an analysis based on the presence of monoclonal antibody HFB-16.
abstract: The KIAA 0864 (KA) protein is a putative protein of a cDNA from 100 cDNA clones that was newly determined from a set of size-fractionated human brain cDNA libraries and their coding potentials of large proteins (180-200 kD) by using in vitro transcription assays. To elucidate the correlation between the KA protein and neuroepithelial tumors (NETs), the present study assessed the KA expression by the NETs using immunohistochemical and Western blot analyses with HFB-16 monoclonal antibody. Among the 55 NETs, a moderate-to-intense KA protein immunoreactivity was observed in 8 of 8 medulloblastomas, 1 of 1 central nervous system supratentorial primitive neuroectodermal tumor (CNS supratentorial PNET), 4 of 4 retinoblastomas, 1 of 1 neuroblastoma, 8 of 8 central neurocytomas, 4 of 4 oligodendrogliomas, 4 of 4 oligoastrocytomas, 1 of 1 extraventricular neurocytoma, and 1 of 1 gangliocytoma. No or a weak KA protein immunoreactivity was observed in 11 of 11 glioblastomas (GBs), 4 of 4 anaplastic astrocytomas, 4 of 4 astrocytomas, and 4 of 4 pilocytic astrocytomas. These results indicate that the antibody HFB-16 could be a useful marker for neuronal tumors and primitive neuroectodermal tumors that may originate from immature neural progenitor cells. In addition, it could be a useful tool for performing the differential diagnosis between GBs and CNS supratentorial PNET.
authors.affiliation: Department of Pathology, Kurume University School of Medicine, Asahimachi 67, Kurume, Fukuoka, 830-0011, Japan. sugita_yasuo@med.kurume-u.ac.jp
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Sugita
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Munehiko
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Sachiko
authors.initials: S
authors.lastname: Ogasawara
authors.forename: Kouichi
authors.initials: K
authors.lastname: Ohshima
authors.forename: Minoru
authors.initials: M
authors.lastname: Shigemori
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D002528:Cerebellar Neoplasms / Q000235:genetics / Q000378:metabolism*; D002648:Child; D002675:Child, Preschool; D005260:Female; D020662:Guanine Nucleotide Exchange Factors / Q000276:immunology / Q000378:metabolism*; D006801:Humans; D008297:Male; D008527:Medulloblastoma / Q000235:genetics / Q000378:metabolism*; D008875:Middle Aged; D018302:Neoplasms, Neuroepithelial / Q000235:genetics / Q000378:metabolism*; D012189:Retrospective Studies; D020663:ras Guanine Nucleotide Exchange Factors
chemical_list: D000911:Antibodies, Monoclonal; D020662:Guanine Nucleotide Exchange Factors; C413212:RASGRP3 protein, human; D020663:ras Guanine Nucleotide Exchange Factors